【作者】 马欣新； 唐光泽； 徐芳君； 孙明仁；

【Author】 Ma Xinxin;Tang Guangze;Xu Fangjun;State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology;National Key Laboratory of Materials Behavior & Evaluation in Space Environment,Harbin Institute of Technology;National Key Laboratory of Science and Technology on Precision Hot Processing of Metals, Haerbin Institute of Technology;

【机构】 先进焊接与连接技术国家重点实验室哈尔滨工业大学； 金属精密热加工国家级重点实验室哈尔滨工业大学； 空间环境材料行为及评价技术重点实验室哈尔滨工业大学；

【摘要】 本文采用强流脉冲电子束对M50钢进行了辐照处理,并对经过辐照处理的M50钢进行了回火处理,采用X射线衍射(XRD)及透射电子显微镜(TEM)对经过辐照及回火的M50钢熔层显微结构进行了研究。结果表明,M50钢经过电子束多次辐照后表层全部由胞状残余奥氏体所组成,其直径大约为150nm左右,熔层中的合金元素在胞状晶周围出现了富集现象。经过回火处理后,表层的残余奥氏体发生分解,生成了马氏体及碳化物。更多还原

【Abstract】 In the present work, M50 steel was irradiated by high current pulsed electron beam(HCPEB). The subsequent tempering had been carried out. Microstructure evolution was analyzed by XRD and TEM. The results indicate that after electron beam irradiation, cellular austenite formed in the melted layer. The dimension is about 150 nm. Metallic elements concentrate among the boundaries. After tempering, the retained austenite decomposed into martensite and carbides.更多还原