核电用ERNiCrMo-3熔敷金属组织及力学性能研究

核电用ERNiCrMo-3熔敷金属组织及力学性能研究 Research on microstructure and mechanical properties of ERNiCrMo-3 deposited metal for nuclear power industry 唐雪 TANG Xue 1 first-author 玉昆 YU Kun 1 蒋力 JIANG Li 1 叶祥熙 YE Xiangxi 1 徐长征 XU Changzheng 1 李志军 LI Zhijun 1 corresp lizhijun@sinap.ac.cn 中国科学院上海应用物理研究所  2. 中国科学院大学  3. 宝武特种冶金有限公司  中国科学院上海应用物理研究所  2. 中国科学院大学  3. 宝武特种冶金有限公司  Shanghai Institute of Applied Physics,Chinese Academy of Sciences Shanghai Institute of Applied Physics,Chinese Academy of Sciences 对采用钨极氩弧焊方法(GTAW)获得的ERNiCrMo-3焊丝熔敷金属进行微观组织表征及力学性能测试。结果表明,熔敷金属微观组织由粗大的柱状晶组成,不同柱状晶内分布树枝晶、等轴晶等亚晶,枝晶间析出Laves相、NbC/TiN和针状δ相;在熔敷金属厚度方向上,硬度从底部到顶部呈现逐渐减小的趋势。熔敷金属中多种析出相未对冲击及拉伸性能产生不利影响。 The multi-pass welding within the groove butt of ERNiCrMo-3 was operated by the gas tungsten arc welding（GTAW）,and the deposited metal was obtained for microstru-cture observation and mechanical properties analysis. The microstructure of deposited metal is dominated by dendrite crystals. The precipitates which are Laves phase,NbC/TiN and δphase are mainly located in the interdendritic core. From the bottom to the top in the deposition direction,the hardness gradually decreases. Various precipitates in the deposited metal have no adverse effect on impact and tensile properties. ERNiCrMo-3 熔敷金属 硬度 冲击性能 拉伸性能 ERNiCrMo-3 deposited metal hardness impact properties tensile properties TM623;TG422.3 国家自然科学基金（U2032205,51971238,52005492） 2022-03-08 7 51