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本文研究了Cr12钢经4种不同的预处理工艺处理后钢中碳化物的大小、数量、分布及钢的硬度、强度和韧性。试验结果表明，经调质处理、高温固港淬火＋高温回火及高温固港淬火＋等温退火处理后，Cr12钢中碳化物的大小、分布及其组织、性能均优于常规球化退火预处理的。通过扫描电镜对冲击断口的分析，初步探讨了新的预处理工艺提高韧性的原因。
In this paper, the size, quantity, distribution and hardness, strength and toughness of carbides in Cr12 steel after four different pretreatment processes were studied. The results show that the size, distribution, microstructure and properties of carbides in Cr12 steel are better than that of conventional spheroidizing annealing after quenched and tempered, high temperature solidified, high temperature tempered and high temperature solidified and isothermal annealed Deal with. By scanning electron microscopy analysis of impact fracture, preliminary discussion of the new pretreatment technology to improve the toughness of the reasons.