摘 要:对在用户锻造加工后的50CrMo4钢出现内部裂纹缺陷的原因进行了分析，找出了内部裂纹产生的原因是由于交货钢材在生产过程中缓冷效果不良，钢材内外组织和性能不均匀差异，并且用户锻造加热时加温速度过快造成的，并提出了解决的措施。
Abstract:This paper simply analyzed the reason of finding the crack in the hot rolled round bars 50CrMo4 produced by BOF→LF+RH→CC of rectangular section→800/650mm Mill in BX STEEL COORPERATION.Find the quality of the 50CrMo4 bars fit the Standards.but the process of heat treatment was not well done.The organization and properties in the section of the bars are very different,and the bars were heated very quickly when were used. emphsis on the organization we analyzed the steel. The notes in heated comes.
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