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裂纹产生的原因及预防?

  答:原因:A.结(jie)构(gou)设计不合理;B.浇注(zhu)系统设计不合理,产生(sheng)热裂;C.金属有害杂质超标预(yu)防:A.裂纹处(chu)加(jia)筋;B.裂纹处(chu)圆角(jiao)加(jia)大;C.控制(zhi)钢水中有害杂质(P、S、Pb、Bi等)

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