Analysis of organizational structure and wear resistance of Nb-Ni-Ti-B strengthened flux-cored wire surfacing metal

Nb-Ni-Ti-B强化药芯焊丝堆焊金属组织结构及耐磨性分析 Analysis of organizational structure and wear resistance of Nb-Ni-Ti-B strengthened flux-cored wire surfacing metal 朱厚囯 ZHU Houguo 1 first-author 赵昆 ZHAO Kun 2 霍树斌 HUO Shubin 1 吉荣亮 JI Rongliang 1 宋昌洪 SONG Changhong 1 陈波 CHEN Bo 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. 针对Nb-Ni-Ti-B强化药芯焊丝堆焊金属进行研究,采用XRD和SEM分析了样品的相结构和显微结构;研究发现焊丝熔敷金属中的Fe 2 B能使熔敷金属堆焊层更加稳固,具有良好的抗剥离性能,Fe 2 B的硬度高、耐磨性好、分布均匀,镶嵌在熔敷金属的基体中有着骨架的作用,使该合金具有了良好的耐磨性;堆焊金属中的TiC为NbC提供了凝结核,形成NbC+TiC复合相,在提高耐磨性的同时有利于促进NbC弥散分布。NbC+TiC复合相弥散分布在熔敷金属中,部分NbC+TiC复合相嵌于Fe 2 B组织中有利于固化Fe 2 B组织。通过Nb-Ni-Ti-B强化药芯焊丝堆焊金属与5C-27Cr型高碳高铬合金焊丝熔敷金属磨损试验比较,Nb-Ni-Ti-B强化堆焊金属相对5C-27Cr型高碳高铬合金的耐磨性为2.08。 This paper studies the surfacing metal of Nb-NiTi-B strengthened flux-cored wire,the crystalline structure and morphology were analyzed by XRD and SEM. The results show that Fe 2 B in the deposited metal can make the deposited metal more stable and has good peeling resistance. Fe 2 B has high hardness,good wear resistance and uniform distribution. It is embedded in the deposited metal as a skeleton,making the alloy have good wear resistance. TiC in the surfacing metal provides condensation nucleus for NbC to form NbC+TiC eutectic tissue,it is beneficial to promote NbC dispersion distribution while improving wear resistance. The NbC + TiC eutectic structure is dispersed in the surfacing metal,and part of the NbC + TiC eutectic structure embedded in the Fe 2 B structure is conducive to the fixation of Fe 2 B structure. By comparing the wear test of NbNi-Ti-B strengthened flux cored wire and 5C-27Cr high carbon and high chromium alloy welding wire, the wear resistance of NbNi-Ti-B strengthened flux cored wire is 2.08 compared with 5C-27Cr high carbon and high chromium alloy welding wire. 耐磨堆焊 药芯焊丝 组织 hardfacing flux cored wire microstructure TG455 2022-03-08 3 51