高强高硬合金钢双丝焊接工艺与接头组织性能

Welding technology and microstructure and properties of welded joint of high strength and hardness alloy steel for tandem GMAW

摘要: 高效化焊接技术是目前焊接领域研究的热点,其应用领域越来越广泛和深入。针对轻型车辆广泛采用的高强高硬合金钢,采用高效双丝熔化极气体保护焊系统,进行了高强高硬合金钢高效化双丝共熔池对接焊缝焊接技术研究。试验采用奥氏体不锈钢焊丝进行高强高硬合金钢的焊接工艺试验,并与相同热输入的单丝熔化极焊接接头进行了对比分析,进行了金相组织、显微硬度、力学性能分析。结果表明,采用高效双丝共熔池熔化极气体保护焊工艺,获得良好的高强高硬合金钢对接焊缝焊接接头,力学性能满足使用要求。

Abstract: Tandem GMAW (gas metal arc welding) is high efficiency welding technology for high strength and hardness alloy steel in heavy vehicles was studied.Austenitic stainless steel wire was adopted to make welding process experiment for high strength and hardness alloy steel, and the performance and microstructure of the joint were researched.The experiment results proved the good joint of high strength and hardness alloy steel was attained with tandem GMAW.