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研究了渗碳后深冷处理对20钢机械性能的影响，分析讨论了深冷处理的作用机理。实验结果表明，20钢渗碳淬火后经深冷处理，其硬度、强度及韧性均有不同程度的提高。
The effect of cryogenic treatment on the mechanical properties of 20 steel after carburizing was studied, and the mechanism of cryogenic treatment was discussed. The experimental results show that the hardness, strength and toughness of 20 steel after carburizing and quenching after the cryogenic treatment have different degrees of improvement.