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一般认为钢材淬火强化,回火后强度和韧性是很难得的。但是,本文介绍了近年来国内外的研究成果,就是将低碳钢经强化淬火后得到与一般马氏体不同的既强又韧的低碳马氏体组织。如何得到低碳马氏体,工艺方法如何?性能如何?本文在大量的试验基础上得到了六种钢材采用适当工艺规范时得到的性能数据、曲线、组织观察照片。经强化处理的15号钢、20号钢、20Cr钢、20CrMnMo钢、20SiMn2MoVA钢的性能均优于调质状态的30CrMnSiA钢。尤其是低温韧性远优于30CrMnSiA钢。这对处于低温使用环境的产品是非常可贵的。本文还对如何使用低碳马氏体钢做了具体论述。
It is generally believed that steel quench hardening, tempering strength and toughness is very rare. However, this paper introduces the research results at home and abroad in recent years, that is, the low-carbon martensitic structure of low-carbon martensite, which is different from the ordinary martensite, is strengthened and quenched. How to get low-carbon martensite, how is the process? What is the performance? In this paper, we get the performance data, curves and histogram of the six kinds of steel obtained by the appropriate process specification on the basis of a large number of tests. The 15, 20, 20Cr, 20CrMnMo, and 20SiMn2MoVA steels treated by strengthening treatment are better than 30CrMnSiA steels being tempered. Especially low temperature toughness is far superior to 30CrMnSiA steel. This is very valuable for products in low temperature environment. This article also made a specific discussion on how to use low-carbon martensitic steel.