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本文主要论述应用 X 时线衍射和电子显微分析等对热处理 M2高速钢经不同工艺的氮离子注入层显微组织形态及合金相结构进行的一些研究。实验确认,注层所含合金相计有;a,Fe_(16)N_2,Fe_4N,Fe_3N,Fe_2N,Cr_2N,CrN 和 M_6C,M_3C,M_2C,MC 等。并初步探讨了注层强化作用的物理机制,认为是由常规合金化过程所发生的现象和只由注入才有的效应等两类结构因素所决定的。
This paper mainly discusses the application of X-ray diffraction and electron microscopy analysis of the microstructure and alloy phase structure of the heat-treated M2 high-speed steel by different processes of nitrogen ion implantation. It is experimentally confirmed that the alloy layer contained in the injection layer contains a, Fe_ (16) N_2, Fe_4N, Fe_3N, Fe_2N, Cr_2N, CrN and M_6C, M_3C, M_2C and MC. The physical mechanism of the strengthening of the injection layer is also discussed preliminarily, which is determined by two kinds of structural factors, such as the phenomenon of the conventional alloying process and the effect of injection only.