焊管2024，Vol.47Issue(2)：50-56,7.DOI:10.19291/j.cnki.1001-3938.2024.02.008
不同工艺参数MIG焊Inconel 625熔覆层微观组织研究
Study on Microstructure of Inconel 625 Cladding Layer by MIG Welding with Different Process Parameters
摘要
Abstract
In order to improve the performance of traditional steel material Q345,the nickel-based cladding layer was prepared by MIG deposition method with commercial Inconel 625 solid core welding wire.The microstructure,element distribution,dilution rate of different welding currents,phase composition and surface hardness of the cladding layer were studied by OM,SEM,EDS,XRD and microhardness test.The results show that the nickel-based cladding layer prepared by MIG deposition method has good bonding with the substrate,and the cladding layer has no obvious macroscopic defects.The cladding layer produces equiaxed crystals,columnar crystals,and cellular crystals from the top to the bottom.The cladding layer is mainly composed of a single face-centered cubic(fcc)γ-Ni solid solution phase.Due to the microsegregation of the cladding layer,the intergranular concentration of Nb,Mo and other elements is high.With the increase of welding current,the dilution rate of the cladding layer gradually increases,the columnar crystal at the bottom of the cladding layer grows up by heat,and the average hardness and the hardness in the depth direction of the cross section of the cladding layer gradually decrease.关键词
MIG堆焊/Q345钢/镍基熔覆层/微观组织/硬度Key words
MIG surfacing welding/Q345 steel/nickel-based cladding layer/microstructure/hardness分类
矿业与冶金引用本文复制引用
马克,程龙,李继红,毛威,刘智博,王森淼..不同工艺参数MIG焊Inconel 625熔覆层微观组织研究[J].焊管,2024,47(2):50-56,7.基金项目
陕西省重点研发计划(秦创原"科学家+工程师"队伍建设项目)"航空航天用高品质钛基钎料的设计开发与应用"(项目编号2023KXJ-234) （秦创原"科学家+工程师"队伍建设项目）
西安市科技计划项目(秦创原"科学家+工程师"队伍建设项目)"重点装备用高性能稀贵金属膏状钎料的设计开发及工程化"(项目编号23KGDW0004-2022). （秦创原"科学家+工程师"队伍建设项目）
