Study o n surfacing process of Ni₃Al-based metal powder-cored wire

Ni 3 Al基金属粉芯焊丝的堆焊工艺性研究 Study o n surfacing process of Ni 3 Al-based metal powder-cored wire 卓晓 ZHUO Xiao 1 2 first-author 唐卫岗 TANG Weigang 1 2 罗寿根 LUO Shougen 1 2 刘金湘 LIU Jinxi-ang 1 2 罗良良 LUO Liangliang 1 2 赵琳 ZHAO Lin 3 浙江省华光新型绿色钎焊材料重点企业研究院 浙江省华光新型绿色钎焊材料重点企业研究院 Zhejiang Huaguang New Green Brazing Materials Key Enterprise Research Institute Zhejiang Huaguang New Green Brazing Materials Key Enterprise Research Institute 杭州华光焊接新材料股份有限公司 杭州华光焊接新材料股份有限公司 Hangzhou Huaguang Advanced Welding Materials Co.,Ltd. Hangzhou Huaguang Advanced Welding Materials Co.,Ltd. 钢铁研究总院 钢铁研究总院 Central Iron and Steel Research Institute Central Iron and Steel Research Institute 采用非熔化极气体保护焊（TIG）进行熔覆堆焊,研究Ni 3 Al及Ni 3 Al+Cr 3 C 2 金属间化合物基金属粉芯焊丝在45#钢、304不锈钢、42Cr Mo合金钢、4Cr14Ni14W2Mo耐热不锈钢基板上的熔覆层组织和性能。结果表明:（1）Ni 3 Al+Cr 3 C 2 熔覆后的平均稀释率（34.55%）低于Ni 3 Al熔覆后的平均稀释率（42.8%）;（2）采用纯Ni 3 Al金属粉芯焊丝堆焊后的熔覆层主要为单一的γ’-Ni 3 Al相,采用Ni 3 Al+Cr 3 C 2 时,熔覆层主要由γ’-Ni 3 Al相MC型及M 23 C 6 型碳化物组成;（3）Ni 3 Al+Cr 3 C 2 熔覆层的显微硬度显著高于纯Ni 3 Al熔覆层;（4）采用Ni 3 Al、Ni 3 Al+Cr 3 C 2 金属粉芯焊丝在4种实验基板上熔覆,焊道冶金结合良好、润湿良好,堆焊后缺陷少,堆焊层硬度高于母材,能够用于相关材料表面增强熔覆。 The TIG welding is used for surfacing to study the cladding layers of Ni 3 Al and Ni 3 Al+Cr 3 C 2 intermetallic compoundbased metal powder-cored wires on different substrate materials.The results show that:（1） After cladding, the average dilution rate of Ni 3 Al+Cr 3 C 2 wire（34.55%） is lower than that of Ni 3 Al wire（42.8%）;（2） The microstructure of cladding layer after surfacing with pure Ni 3 Al metal powder-cored wire is mainly single γ’-Ni 3 Al phase, and when using Ni 3 Al+Cr 3 C 2 wire, the cladding layer is mainly composed of γ’-Ni 3 Al phase and MC type and M23 C6 type carbides;（3）The microhardness of Ni 3 Al+Cr 3 C 2 cladding layer is significantly higher than that of pure Ni 3 Al cladding layer;（4） Using Ni 3 Al,Ni 3 Al+Cr 3 C 2 metal powder-cored wire for cladding on 4 kinds of experimental substrates, the bead has good metallurgy bonding and wetting, and few defects after surfacing, and the hardness of the surfacing layer is higher than that of the base metal, so it can be used for surfacing of related materials. Ni3Al Ni3Al+Cr3C2 工艺性 熔覆层 金属粉芯焊丝 Ni3Al Ni3Al +Cr3C2 manufacturability cladding layer metal powder-cored wire TG455 2022-03-08 10 51