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      模具论坛»论坛 › 模具技术中心 › 『 压铸模具 』 › 『 压铸资料区 』 › 常见压铸缺陷
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      常见压铸缺陷

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      观海听鸥
      发表于 2006-2-16 15:55:00 | 显示全部楼层 |阅读模式
      <P  align=center>常见铸造缺陷<p></p></P>
      <TABLE  cellSpacing=0 cellPadding=0 border=1>

      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>名称<p></p></P></TD>
      <TD  vAlign=top width=204>
      <P  align=center>特征<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P  align=center>形成原因<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P  align=center>防止方法及修补<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>气孔<p></p></P></TD>
      <TD  vAlign=top width=204>
      <P >1.     气孔主要呈梨形，圆形或椭圆形            <p></p></P>
      <P >2.     孔壁表面光滑带有金属光泽                  <p></p></P>
      <P >3.     大多数存在于铸件皮下 ，大气孔单独存在，小气孔成群出现<p></p></P>
      <P >4. 油烟气孔呈油黄色      <p></p></P></TD>
      <TD  vAlign=top width=192>
      <P >1.     液体金属浇注时被卷入的气体在合金液凝固以后以气孔的形式存在于铸件中 <p></p></P>
      <P >2.     金属与铸型反应后再铸件表皮下生成皮下气孔<p></p></P>
      <P >3.  合金液中的夹渣或氧化皮上附着的气体或混入合金液后形成气孔<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P >1. 浇注时防止气体卷入                                      2.  合金液在进入型腔前先经过过滤网   以去除合金液中的夹渣，氧化皮及气泡                                   3.  更换铸型材料或加涂料层防止合金  液与铸型发生反应                                               4.  在允许焊补的部位将缺陷清理后进行焊补<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>针孔<p></p></P></TD>
      <TD  vAlign=top width=204>
      <P >1.     均匀的分布在铸件的整个端面上的析出性小孔（小于<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="1" UnitName="mm">1mm</st1:chmetcnv>）<p></p></P>
      <P >2.     凝固快的部位孔小数量少，凝固慢的部位孔大数量多<p></p></P>
      <P >3.     在共晶合金中呈圆形孔洞，在凝固间隔宽的合金中呈长形孔洞<p></p></P>
      <P >4.     在X射线底片上呈小黑点，在断口上呈互不连接的乳白色小凹点<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P  align=center>合金在液体状态下溶解的气体（主要为氢），在合金凝固过程中自合金中析出面形成的均匀形式的孔洞<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P >1.     合金在液体状态下彻底精炼除气<p></p></P>
      <P >2.     在凝固过程中加大凝固速度防止溶解的气体自合金中析出<p></p></P>
      <P >3.     铸件在压力下凝固，防止合金溶解的气体析出<p></p></P>
      <P >4.     炉料，辅助材料及工具应干燥<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>缩孔<p></p></P>
      <P  align=center>和<p></p></P>
      <P  align=center>缩松<p></p></P></TD>
      <TD  vAlign=top width=204>
      <P ><FONT face="Times New Roman">1.<FONT size=3>      </FONT></FONT>铸件在凝固过程中由于补缩不良形成的孔洞<p></p></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>      </FONT></FONT>缩孔相对集中，形状极不规则，孔壁粗糙并带有枝晶状，常出现在铸件最后凝固部位<p></p></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>      </FONT></FONT>缩松细小而分散地出现在铸件的断面上<p></p></P>
      <P ><FONT face="Times New Roman">4.<FONT size=3>      </FONT></FONT>铸件缩孔和缩松引起气密性实验的渗漏<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P  align=center><FONT face="Times New Roman">1.<FONT size=3>      </FONT></FONT>铸件冒口位置和尺寸与热节不配套，不能有效补缩引起缩孔<p></p></P>
      <P  align=center><FONT face="Times New Roman">2.<FONT size=3>      </FONT></FONT>同时凝固的铸件厚大部位不能有效获得补缩获得缩松<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P >合理设计铸件浇冒系统和浇注位置，尽量保证铸件顺序凝固和冒口充分补缩，可以减轻缩松和缩松的产生<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>疏松（显微缩松）<p></p></P></TD>
      <TD  vAlign=top width=204>
      <P >1.     呈海绵状的不紧密组织，严重时呈缩孔<p></p></P>
      <P >2.     孔的表面粗糙的凹坑，晶粒粗大<p></p></P>
      <P >3.     断口呈灰色或浅黄色，热处理后为灰白色，浅黄或灰黑色<p></p></P>
      <P >4.     多在热节等铸件缓慢凝固部位产生，分布在枝晶间或枝晶内<p></p></P>
      <P >5.     在X射线底片上呈云雾状，萤光检验时呈密集的小亮点<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P >1.     合金液除气不干净形成气体性疏松<p></p></P>
      <P >2.     最后凝固部位补缩不足<p></p></P>
      <P >3.     铸型局部过热，水分过多，排气不良<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P >1.     保持合理的凝固速度和补缩<p></p></P>
      <P >2.     炉料洁净<p></p></P>
      <P >3.     在疏松部位放置冷铁<p></p></P>
      <P >4.     在允许补焊的部位可将缺陷部位清理干净后焊补<p></p></P></TD></TR></TABLE>
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      观海听鸥
       楼主| 发表于 2006-2-16 15:57:00 | 显示全部楼层
      <P  align=center>常见铸造缺陷<p></p></P>
      <TABLE  cellSpacing=0 cellPadding=0 border=1>

      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>名称<p></p></P></TD>
      <TD  vAlign=top width=204>
      <P  align=center>特征<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P  align=center>形成原因<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P  align=center>防止方法及修补<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center><FONT face="Times New Roman"> <p></p></FONT></P>
      <P  align=center>夹杂<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P >1.由涂料，造型材料，耐火材料等混入合金液中而形成铸件表面或内部的与基体金属成分不同的质点<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P >1.     外来物混入液体合金并浇注入铸型<p></p></P>
      <P >2.     精炼效果不良<p></p></P>
      <P >3.     铸型的内腔表面的外来物或造型材料剥落<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P >1.     仔细精炼并注意扒渣<p></p></P>
      <P >2.     熔炼工具涂层附着牢固<p></p></P>
      <P >3.     浇注系统及型腔应清理干净<p></p></P>
      <P >4.     炉料应保持清洁<p></p></P>
      <P >5.     表面夹杂可打磨去除，必要时可进行焊补<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center><FONT face="Times New Roman">  <p></p></FONT></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center>冷隔<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P >1.     铸件上穿透性的或不穿透性的，边缘呈圆角状的裂缝<p></p></P>
      <P >2.     多出现在远离浇口的宽大薄壁部位，金属汇合部位以及冷铁和芯撑等激冷部位<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P  align=center>1.     金属液浇注温度太低<p></p></P>
      <P  align=center>2.     金属液充型流程太长<p></p></P>
      <P >3.  壁厚太薄<p></p></P>
      <P >4.  冷铁和芯撑冷却能力太大<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P ><FONT face="Times New Roman">1.<FONT size=3>       </FONT></FONT>适当提高浇注温度<p></p></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>       </FONT></FONT>调整浇冒系统位置，减少金属液流程<p></p></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>       </FONT></FONT>适当加大薄壁件的壁厚<p></p></P>
      <P ><FONT face="Times New Roman">4.<FONT size=3>       </FONT></FONT>减少冷铁或芯撑的尺寸<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center>夹渣<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P >1.     氧化夹渣以团絮状存在于铸件内部断口呈黄色或灰白色，无光泽<p></p></P>
      <P >2.     溶剂夹渣呈暗褐色点状，夹渣清除后呈光滑表面的孔洞，在空气中暴漏一段时间后，有时出现腐蚀特征<p></p></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>      </FONT></FONT>一般存在于铸件上部或浇注死角部位<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P >1．  精炼变质处理后除渣不干净<p></p></P>
      <P >2．  精炼变质后静置时间不够<p></p></P>
      <P >3．  浇注系统不合理，二次氧化皮卷入合金液中<p></p></P>
      <P >4．  精炼后合金液搅动或被污染<p></p></P>
      <P ><p><FONT face="Times New Roman"> </FONT></p></P></TD>
      <TD  vAlign=top width=251>
      <P ><FONT face="Times New Roman">1.<FONT size=3>       </FONT></FONT>严格按精炼变质浇注工艺操作<p></p></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>       </FONT></FONT>浇注时应使金属液流平稳的注入铸型，采用过滤技术<p></p></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>       </FONT></FONT>炉料应保持清洁，回炉料处理及使用量应严格遵守工艺规章<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center><p><FONT face="Times New Roman"> </FONT></p></P>
      <P  align=center>裂纹<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P ><FONT face="Times New Roman">1.<FONT size=3>      </FONT>铸件在较低的温度下生的裂纹称冷裂冷裂纹一般有金属光泽常穿过晶粒延伸到整个断面<p></p></FONT></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>      </FONT>铸件在凝固后期或凝固后在较高的温度下形成的裂纹称热裂热裂纹断面呈氧化特征无金属光泽多产生在热节区尖角内侧，厚薄断面交汇处常和疏松共生，热裂纹沿晶粒边界产生和发展，外形曲折不规则<p></p></FONT></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>      </FONT>由于铸件补缩不当，收缩受阻或收缩不均匀而产生的裂纹称缩裂，一般出现在铸件刚凝固后<p></p></FONT></P></TD>
      <TD  vAlign=top width=192>
      <P ><FONT face="Times New Roman">1.<FONT size=3>      </FONT>铸件各部分冷却不均匀<p></p></FONT></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>      </FONT>铸件凝固和冷却过程受到外界阻力而不能自由收缩，内应力超过合金强度而产生裂纹<p></p></FONT></P></TD>
      <TD  vAlign=top width=251>
      <P ><FONT face="Times New Roman">1.<FONT size=3>       </FONT></FONT>尽可能保持顺序凝固或同时凝固，减少内应力<p></p></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>       </FONT></FONT>细化合金组织<p></p></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>       </FONT></FONT>选择适宜的浇注温度<p></p></P>
      <P ><FONT face="Times New Roman">4.<FONT size=3>       </FONT></FONT>增加铸型和型芯的退让性<p></p></P></TD></TR></TABLE>
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      观海听鸥
       楼主| 发表于 2006-2-16 15:58:00 | 显示全部楼层
      <P  align=center>常见铸造缺陷<p></p></P>
      <TABLE  cellSpacing=0 cellPadding=0 border=1>

      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>名称<p></p></P></TD>
      <TD  vAlign=top width=204>
      <P  align=center>特征<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P  align=center>形成原因<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P  align=center>防止方法及修补<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>偏析<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P >1.     用肉眼或低倍放大镜可见的化学成分不均匀性称宏观偏析<p></p></P>
      <P >2.     用显微镜或其他仪器方能确定的显微尺度范围内的化学成分不均匀性称微观偏析，分为枝晶偏析和晶界偏析<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P >1.     宏观偏析一般是由于熔炼过程中某些元素的化合物因密度与基体不同沉淀或上浮<p></p></P>
      <P >2.     合金凝固过程中由于溶质再分配引起某些元素或低熔点物质在晶界或枝晶间富集导致微观偏析<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P >1.     宏观偏析可以通过适当缩短金属液的停留时间，浇注时充分搅拌金属液，在合金液中加入阻碍初晶浮沉的元素，降低浇注温度或加快凝固温度等方法减弱<p></p></P>
      <P >2.     晶粒细化，提高冷却速度和均匀化热处理可以减轻微观偏析<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>外渗豆<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P >1.     铸件表面上形成豆粒状的凸起物<p></p></P>
      <P >2.     金相检查一般为低熔点共晶富集区<p></p></P></TD>
      <TD  vAlign=top width=192>
      <P >当铸件中心部位尚未凝固时，铸件表面收缩，中心未凝固的液相穿透表面层渗出而生成<p></p></P></TD>
      <TD  vAlign=top width=251>
      <P ><FONT face="Times New Roman">1.<FONT size=3>       </FONT></FONT>适当降低浇注温度<p></p></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>       </FONT></FONT>适当提高铸型的冷却能力<p></p></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>       </FONT></FONT>延长开模时间<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>金相组织不合理<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P ><FONT face="Times New Roman">1.<FONT size=3>      </FONT>晶粒粗大<p></p></FONT></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>      </FONT>变质不足或变质过度<p></p></FONT></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>      </FONT>其他有金相要求的项目不合格<p></p></FONT></P></TD>
      <TD  vAlign=top width=192>
      <P ><FONT face="Times New Roman">1.<FONT size=3>      </FONT>晶粒细化不均匀<p></p></FONT></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>      </FONT>变质处理孕育期短或停留时间太长，变质剂使用量不合格<p></p></FONT></P></TD>
      <TD  vAlign=top width=251>
      <P ><FONT face="Times New Roman">1.<FONT size=3>       </FONT></FONT>采用合理科学的晶粒细化和变质工艺<p></p></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>       </FONT></FONT>炉前检测并即时调整合金质量<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>化学成分不合格<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P ><FONT face="Times New Roman">主要元素含量超过上限或低于下限，杂质元素超过允许的上限含量<p></p></FONT></P></TD>
      <TD  vAlign=top width=192>
      <P ><FONT face="Times New Roman">1.<FONT size=3>      </FONT>中间合金或预制合金成分不均匀或成分分析误差过大<p></p></FONT></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>      </FONT>炉料计算或炉料称量错误<p></p></FONT></P>
      <P ><FONT face="Times New Roman">3.<FONT size=3>      </FONT>熔炼操作失当，易氧化元素烧损过大<p></p></FONT></P>
      <P ><FONT face="Times New Roman">4.<FONT size=3>      </FONT>熔炼搅拌不均，易偏析元素分布不均<p></p></FONT></P></TD>
      <TD  vAlign=top width=251>
      <P ><FONT face="Times New Roman">1.<FONT size=3>       </FONT></FONT>炉前分析成分不合格时可适当进行调整<p></p></P>
      <P ><FONT face="Times New Roman">2.<FONT size=3>       </FONT></FONT>最终检验不合格时可会同设计及使用部门协商处理<p></p></P></TD></TR>
      <TR >
      <TD  vAlign=top width=85>
      <P  align=center>物理力学性能不合格<p></p></P></TD>
      <TD  vAlign=top width=98>
      <P ><FONT face="Times New Roman">铸件强度，硬度，伸长率及耐热，耐蚀，耐磨和电性能等不符合技术条件的规定<p></p></FONT></P></TD>
      <TD  vAlign=top width=192>
      <P ><FONT face="Times New Roman">合金成分不合格，金相不合格或热处理不合适等因素<p></p></FONT></P></TD>
      <TD  vAlign=top width=251>
      <P >根据需要调整合金成分，热处理等<p></p></P></TD></TR></TABLE>
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      qxxie10
      发表于 2006-2-16 19:33:00 | 显示全部楼层
      怎么压铸缺陷变成了铸造缺陷，不要混为一谈。
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      qwqwqw2008
      发表于 2006-2-17 10:11:00 | 显示全部楼层
      顶一下，太好了
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      pandeqi
      发表于 2006-2-18 22:15:00 | 显示全部楼层
      <DIV class=quote twffan="done"><B>以下是引用<I>qxxie10</I>在2006-2-16 19:33:00的发言：</B><BR>怎么压铸缺陷变成了铸造缺陷，不要混为一谈。</DIV>
      <P>很多都是有共性的东西呀!</P>
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      yola
      发表于 2006-2-20 08:35:00 | 显示全部楼层
      <P>讲得很好,为小女子又增加知识一两!多谢,</P>
      <P>还有问题,不知你们设计模具是用哪个软件?哪个软件较好?</P>
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      观海听鸥
       楼主| 发表于 2006-2-23 12:20:00 | 显示全部楼层
      用的UG，感觉还可以！
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      weisanhong
      发表于 2006-3-1 17:33:00 | 显示全部楼层
      如果产品动定模不平行，请问如果模具抽芯部位！
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      qaz5201399
      发表于 2006-3-2 05:41:00 | 显示全部楼层
      谢谢了``辛苦楼主了~
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      weisanhong
      发表于 2006-3-3 15:39:00 | 显示全部楼层
      <P>还可以对我有帮助！</P>
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      weisanhong
      发表于 2006-3-3 16:38:00 | 显示全部楼层
      <TABLE 806pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=1074 border=0 x:str>
      <COLGROUP>
      <COL style="WIDTH: 101pt; mso-width-source: userset; mso-width-alt: 4288" width=134>
      <COL style="WIDTH: 67pt; mso-width-source: userset; mso-width-alt: 2848" width=89>
      <COL style="WIDTH: 60pt; mso-width-source: userset; mso-width-alt: 2560" width=80>
      <COL style="WIDTH: 54pt" span=2 width=72>
      <COL style="WIDTH: 92pt; mso-width-source: userset; mso-width-alt: 3936" width=123>
      <COL style="WIDTH: 54pt" span=7 width=72>

      <TR 25.5pt; mso-height-source: userset" height=34>
      <TD class=xl24 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 536pt; BORDER-BOTTOM: black 0.5pt solid; HEIGHT: 39.75pt; BACKGROUND-COLOR: transparent" width=714 colSpan=8 height=53 rowSpan=2><STRONG><FONT size=2>                 压 铸 件 表 面 缺 陷</FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD></TR>
      <TR 14.25pt" height=19>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD></TR>
      <TR 29.25pt; mso-height-source: userset" height=39>
      <TD class=xl27 windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 29.25pt; BACKGROUND-COLOR: transparent" height=39><STRONG><FONT size=2>缺 陷 名 称</FONT></STRONG></TD>
      <TD class=xl27 windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" colSpan=2><STRONG><FONT size=2>特  征</FONT></STRONG></TD>
      <TD class=xl27 windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" colSpan=3><STRONG><FONT size=2>产 生 的 原 因</FONT></STRONG></TD>
      <TD class=xl28 black 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" colSpan=7><STRONG><FONT size=2>防  止  方  法</FONT></STRONG></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl31 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: black 0.5pt solid; HEIGHT: 182.25pt; BACKGROUND-COLOR: transparent" height=243 rowSpan=9><STRONG><FONT size=2>拉 伤</FONT></STRONG></TD>
      <TD class=xl32 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 127pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=169 colSpan=2 rowSpan=5><FONT size=2>沿开模方向铸件表面呈现条状的拉伤痕迹，有一定的深度，严重时为一面状伤痕</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>1.型腔表面有损伤</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=4><FONT size=2>1.修理模具表面损伤处,修正斜度,提高光洁度</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3 height=27><FONT size=2>2.出模方向斜度太小或倒斜</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3><FONT size=2>2.调整顶杆,使顶出力平衡</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2 height=27><FONT size=2>3.顶出时偏出</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>3.更换脱模剂</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl36 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 200pt; BORDER-BOTTOM: #d4d0c8; HEIGHT: 40.5pt; BACKGROUND-COLOR: transparent" width=267 colSpan=3 height=54 rowSpan=2><FONT size=2>4.浇注温度过高或过低、模温<BR>  过高导致合金液产生粘附</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>4.调整合金的成分</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3 height=27><FONT size=2>5.控制合适的浇注温度,控制模温</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl32 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 127pt; BORDER-BOTTOM: black 0.5pt solid; HEIGHT: 81pt; BACKGROUND-COLOR: transparent" width=169 colSpan=2 height=108 rowSpan=4><FONT size=2>另一种是金属液与模具产生焊合、粘附而拉伤，以致铸件表面多肉或缺肉</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>5.脱模剂使用效果不好</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=5><FONT size=2>6.修改内浇口,避免直冲型心型壁或对型心表面进行特殊处理</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3 height=27><FONT size=2>6.铝合金成分铁含量低于0.6%</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2 height=27><FONT size=2>7.冷却时间过长或过短</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl42 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent" height=27><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl44 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl42 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl44 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR></TABLE>
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      weisanhong
      发表于 2006-3-3 16:40:00 | 显示全部楼层
      <TABLE 806pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width=1074 border=0 x:str>
      <COLGROUP>
      <COL style="WIDTH: 101pt; mso-width-source: userset; mso-width-alt: 4288" width=134>
      <COL style="WIDTH: 67pt; mso-width-source: userset; mso-width-alt: 2848" width=89>
      <COL style="WIDTH: 60pt; mso-width-source: userset; mso-width-alt: 2560" width=80>
      <COL style="WIDTH: 54pt" span=2 width=72>
      <COL style="WIDTH: 92pt; mso-width-source: userset; mso-width-alt: 3936" width=123>
      <COL style="WIDTH: 54pt" span=7 width=72>

      <TR 25.5pt; mso-height-source: userset" height=34>
      <TD class=xl24 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 536pt; BORDER-BOTTOM: black 0.5pt solid; HEIGHT: 39.75pt; BACKGROUND-COLOR: transparent" width=714 colSpan=8 height=53 rowSpan=2><STRONG><FONT size=2>                 压 铸 件 表 面 缺 陷</FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 54pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=72><STRONG><FONT size=2></FONT></STRONG></TD></TR>
      <TR 14.25pt" height=19>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent" height=19><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><STRONG><FONT size=2></FONT></STRONG></TD></TR>
      <TR 29.25pt; mso-height-source: userset" height=39>
      <TD class=xl27 windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 29.25pt; BACKGROUND-COLOR: transparent" height=39><STRONG><FONT size=2>缺 陷 名 称</FONT></STRONG></TD>
      <TD class=xl27 windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" colSpan=2><STRONG><FONT size=2>特  征</FONT></STRONG></TD>
      <TD class=xl27 windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" colSpan=3><STRONG><FONT size=2>产 生 的 原 因</FONT></STRONG></TD>
      <TD class=xl28 black 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent" colSpan=7><STRONG><FONT size=2>防  止  方  法</FONT></STRONG></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl31 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: black 0.5pt solid; HEIGHT: 182.25pt; BACKGROUND-COLOR: transparent" height=243 rowSpan=9><STRONG><FONT size=2>拉 伤</FONT></STRONG></TD>
      <TD class=xl32 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 127pt; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent" width=169 colSpan=2 rowSpan=5><FONT size=2>沿开模方向铸件表面呈现条状的拉伤痕迹，有一定的深度，严重时为一面状伤痕</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>1.型腔表面有损伤</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=4><FONT size=2>1.修理模具表面损伤处,修正斜度,提高光洁度</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3 height=27><FONT size=2>2.出模方向斜度太小或倒斜</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3><FONT size=2>2.调整顶杆,使顶出力平衡</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2 height=27><FONT size=2>3.顶出时偏出</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>3.更换脱模剂</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl36 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 200pt; BORDER-BOTTOM: #d4d0c8; HEIGHT: 40.5pt; BACKGROUND-COLOR: transparent" width=267 colSpan=3 height=54 rowSpan=2><FONT size=2>4.浇注温度过高或过低、模温<BR>  过高导致合金液产生粘附</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>4.调整合金的成分</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3 height=27><FONT size=2>5.控制合适的浇注温度,控制模温</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl32 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; WIDTH: 127pt; BORDER-BOTTOM: black 0.5pt solid; HEIGHT: 81pt; BACKGROUND-COLOR: transparent" width=169 colSpan=2 height=108 rowSpan=4><FONT size=2>另一种是金属液与模具产生焊合、粘附而拉伤，以致铸件表面多肉或缺肉</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2><FONT size=2>5.脱模剂使用效果不好</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=5><FONT size=2>6.修改内浇口,避免直冲型心型壁或对型心表面进行特殊处理</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 black 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=3 height=27><FONT size=2>6.铝合金成分铁含量低于0.6%</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: #d4d0c8; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent; mso-ignore: colspan" colSpan=2 height=27><FONT size=2>7.冷却时间过长或过短</FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl34 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl25 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2></FONT></TD>
      <TD class=xl35 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: #d4d0c8; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR>
      <TR 20.25pt; mso-height-source: userset" height=27>
      <TD class=xl42 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 20.25pt; BACKGROUND-COLOR: transparent" height=27><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl44 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl42 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl43 #d4d0c8; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD>
      <TD class=xl44 windowtext 0.5pt solid; BORDER-TOP: #d4d0c8; BORDER-LEFT: #d4d0c8; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent"><FONT size=2>　</FONT></TD></TR></TABLE>
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      qwqwqw2008
      发表于 2006-3-3 18:45:00 | 显示全部楼层
      顶呀．厉害，就是牛！
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      lshzhm
      发表于 2006-12-27 10:03:00 | 显示全部楼层
      <p>kk</p><p></p>
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      liuhuzaqw
      发表于 2008-3-23 14:51:40 | 显示全部楼层
      慢慢理解中吧~!~!~!~!
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