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采用化学、金相分析等方法对质量异议提出的裂纹缺陷进行了分析,结果认为,料温偏低和设计中分型模在该区的过渡弧角过小,引起金属流线的交叠错动,是产生折叠缺陷的原因。
The chemical defects and the metallographic analysis were used to analyze the crack defects proposed by the quality objection. The results show that the low transition temperature and the transition arc angle of the parting mold in this area are too small, causing the overlap of metal flow lines Dynamic, is the reason for folding defects.