Ta、Nb元素对ERNiCrFe-13焊丝熔敷金属组织与性能的影响

Ta、Nb元素对ERNiCrFe-13焊丝熔敷金属组织与性能的影响 Effect of Ta and Nb on microstructure and properties of deposited metal of ERNiCrFe-13 welding wire 霍树斌 HUO Shubin 1 first-author 侯永涛 HOU Yongtao 1 2 郭枭 GUO Xiao 2 徐锴 XU Kai 2 陈波 CHEN Bo 1 杨再勋 YANG Zaixun 1 哈尔滨威尔焊接有限责任公司 哈尔滨威尔焊接有限责任公司 Harbin Well Welding Co., Ltd. Harbin Well Welding Co., Ltd. 哈尔滨焊接研究院有限公司 哈尔滨焊接研究院有限公司 Harbin Welding Institute Co., Ltd. Harbin Welding Institute Co., Ltd. 采用光学显微镜（OM）、扫描电镜及能谱仪（SEM、EDS）、拉伸试验和冲击试验等对比研究了Ta、Nb元素含量对ERNiCrFe-13镍基合金焊丝（1#焊丝高Ta低Nb,2#焊丝高Nb低Ta）熔敷金属组织与性能的影响。结果表明,1#焊丝和2#焊丝熔敷金属组织均为柱状枝晶,且存在偏析带,在偏析带上存在析出相,1#焊丝的析出相主要为碳化物和Laves相,面积约为0.5～2μm 2 ;2#焊丝的析出相除碳化物和Laves相外,还存在σ相和γ/Laves相共晶组织,析出相面积约为3～10μm 2 ;1#焊丝熔敷金属的力学性能远高于要求值,满足在核电工程上的安全应用条件,2#焊丝熔敷金属冲击性能较差,整体上看1#焊丝熔敷金属的力学性能优于2#焊丝。 The effects of Ta and Nb element content on the organization and properties of ERNiCrFe-13 nickel-based alloy wire（1# wire high Ta and low Nb, 2# wire high Nb and low Ta） deposited metal were studied comparatively by optical microscope（OM）,scanning electron microscope（SEM）,energy dispersive spectrometer（EDS）,tensile test and impact test. The results show that the microstructure of deposited metal of 1# welding wire and 2# welding wire is columnar dendrite, and there is segregation zone, and there are precipitates on the segregation zone. The precipitates of 1#welding wire are mainly carbide and Laves phase, with an area of about 0.5～2 μm 2 ;in addition to carbide and Laves phase, the precipitated phase of 2# welding wire also exists σ Phase harmony γ/Laves phase eutectic structure, the area of precipitated phase is about 3～10 μm 2 ;the mechanical properties of the deposited metal of 1#welding wire are much higher than the required value, meeting the safety application conditions in nuclear power engineering. The impact properties of the deposited metal of 2# welding wire are poor. On the whole, the mechanical properties of the deposited metal of 1# welding wire are better than that of 2# welding wire. During the development of nickel-based alloy wire, the formation of Laves and σ phases in the molten metal should be minimized. ERNiCrFe-13 力学性能 γ/Laves相共晶组织 ERNiCrFe-13 mechanical property γ/Laves phase eutectic structure TG422.3 国家科技重大专项资金资助项目(2018ZX06004001) 2022-03-08 12 51