Cr12MoV钢CD渗碳后马氏体形态的研究EI

本文采用扫描电镜和透射电镜分析了Ｃｒ１２ＭｏＶ钢ＣＤ渗碳淬火后碳及合金元素的微区成分、表层与心部的组织形态及其对力学性能的影响。经观察，尽管Ｃｒ１２ＭｏＶ钢名义含碳量很高，但ＣＤ渗碳淬火后渗层及心部的马氏体仍是以位错马氏体为主的混合马氏体。这种类型的马氏体和残余奥氏体及其中弥散分布的碳化物构成的渗层—复相组织，显著提高了钢的强韧性。

Study on the Morphology of Martensite in CD CarburizedCr 12MoV Steel

In this paper, Content of carbon and alloy element, morphology of martensite both in inside and surpace,and Their affects on properties,which emerge in CD carbured and quenched Crl2MoV steel, are studied by means of TEM and SEM. The observation reveals, although Cr12MoV steel containes high content of carbon and was carburized,both in outside and inside micro.structure exists only multi-martensite, in which dislocation martensite is dominant.The carburized layer is composed of this typo of martensite, retained austenite as well as dispersed fine carbide, which contributes stength and toughness.