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分析了２５Ｃｒ２ＭｏＶＡ钢经常规离子渗氮和快速离子渗氮后氮化表层的物相组成；研究了快速离子渗氮后时效温度与物相的关系。
The phase composition of nitrided surface layer of 25Cr2MoVA steel after conventional ion nitriding and rapid ion nitriding was analyzed. The relationship between aging temperature and phase was studied after rapid ion nitriding.