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裂纹产生的原因及预防?

  答:原因(yin):A.结构设(she)计不(bu)合(he)理(li);B.浇注系(xi)统(tong)设(she)计不(bu)合(he)理(li),产生热(re)裂(lie);C.金属有害杂(za)质超标预防:A.裂(lie)纹(wen)处(chu)加筋;B.裂(lie)纹(wen)处(chu)圆角加大(da);C.控制钢水中有害杂(za)质(P、S、Pb、Bi等)

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