焊管2024，Vol.47Issue(12)：38-43,6.DOI:10.19291/j.cnki.1001-3938.2024.12.006
不同保护气成分对B10合金MIG/MAG焊接接头组织和性能的影响
Effect on Microstructure and Properties of B10 Alloy MIG/MAG Welded Joints with Different Protective Gas Components
摘要
Abstract
In order to study the effects of different welding torch shielding gases on the microstructure and properties of B10 alloy MIG/MAG welded joints,helium and carbon dioxide gas were added to argon,and the microstructure,mechanical properties,technological properties and corrosion properties of B10 alloy MIG/MAG welded plates under three kinds of welding torch shielding gases were tested.The results show that the weld microstructure of the welded joints under the three shielding gases is dendritic α-phase,and the heat-affected zone microstructure is twinned α-phase,with no obvious difference.The average tensile strength of the joint is 344 MPa,345 MPa and 339 MPa,respectively,and the fracture locations of the joint occurs in the base metal,which is higher than the standard lower limit value of the base metal.Under the condition that the bending radius is equal to 4 times the thickness of the specimen and the bending angle is 180°,the bending performance is good.The hardness of the weld and heat affected zone is lower than that of the base metal.The uniform full immersion corrosion rates of the welded specimens under the three protective gases are similar,but in the seawater erosion corrosion test,the corrosion amount of the 97.5%Ar+2.5%CO2 welding protective gas is the highest,the corrosion amount of the 99.99%Ar welding protective gas is the second,and the 80%Ar+20%He welding protective gas has the smallest corrosion amount.关键词
MIG焊接/MAG焊接/B10合金/微观组织/力学性能Key words
MIG welding/MAG welding/B10 alloy/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
刘甲,孙崇锋,陈利阳,雷小伟,晏阳阳,崔永杰,张浩,郁炎,韩茂盛..不同保护气成分对B10合金MIG/MAG焊接接头组织和性能的影响[J].焊管,2024,47(12):38-43,6.基金项目
国防基础科研项目资助(项目编号JCKY2021206B039). （项目编号JCKY2021206B039）
