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《Heat Treatment of Metals》 2005-04
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Investigation of Carbide Precipitation Order of 2.25Cr-1Mo Steel During Tempering

LIU Zheng-dong,YANG Gang,CHENG Shi-chang,ZHANG Guang-zhong (Central Iron & Steel Research Institute,Beijing 100081,China)  
The variations of carbides and precipitation order of 2.25Cr-1Mo steel with a fully granular bainite microstructure during tempering were investigated by chemical phase analysis.The results show that within the tempering parameters of 18140~22000,the carbides precipitated are M_2(CN),M_6C,M_4C_3,Cr_9C_3和M_(23)C_6,and the precipitation order is M_2(CN)→M_6C→M_7C_3,Cr_7C_3→M_(23)C_6.The variation process of the carbides is a series of overlapping phases.
【CateGory Index】: TG156.2
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