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本文用 x 射线衍射仪、透射电镜、显微硬度计等仪器对40Cr、42CrMo、38CrMoAl 及 32Cr2MoVAl 钢尿素软氮化后的渗层组织、微观内应力、成分和硬度间的关系进行了实验和分析,提出不同成分的钢在一定温度下软氮化后渗层中形成不同成分、不同数量和形态的合金元素氮碳化合物的 GP 区;中间相和弥散分布的微细氮碳化合物机理,并认为它们是表层内形成高的内应力和高的显微硬度的根本原因,是提高材料机械性能、耐磨性能和零件使用寿命的关键。
In this paper, the relationship between microstructure, microscopic internal stress, composition and hardness of nitrided nitrided 40Cr, 42CrMo, 38CrMoAl and 32Cr2MoVAl steel was studied by means of X-ray diffraction, transmission electron microscope and microhardness tester. , Proposed different composition of the steel at a certain temperature nitriding layer after the formation of different composition, the number of different forms and forms of alloying elements of nitrogen and carbon compounds in the GP zone; mesophase and dispersed distribution of fine carbon and carbon compounds, and that they Is the root causes of the formation of high internal stress and high microhardness in the surface and is the key to improve the mechanical properties, wear resistance and service life of parts.