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我厂在模具生产实践中遇到过几种开裂情况,通过分析这些开裂的产生原因,提出了一些相应的措施。现将我们的一些经验介绍如下: 1.慎施调质工艺为了减少模具在最终热处理时的淬火变形,生产中习惯上先作毛坯调质处理。作者认为不妥。其原因是,当模具钢的含碳量在0.6%以上时,淬火所获得的组织主要是透镜片状马氏体。这种马氏体片与片之间大致呈50°夹角,而且马氏体片在瞬时形成时以1500
I plant in the mold production practice encountered several cracking situation, by analyzing the causes of these cracks, put forward some corresponding measures. Now introduce some of our experience as follows: 1. Shen Shi quenching and tempering process In order to reduce the mold quenching deformation in the final heat treatment, the production of the first habit of pre-quenched and tempered. The author thinks it is wrong. The reason is that when the carbon content of the mold steel is above 0.6%, the microstructure obtained by quenching is mainly lens flaky martensite. This martensite sheet and the sheet roughly between the angle of 50 °, and the martensite sheet in the instantaneous formation of 1500