SMA490BW耐候钢激光-电弧复合焊接接头性能  

Properties of welded joint in laser-MAG hybrid welding of SMA490BW weather-resistance steel

作　　者：单清群 孙福庆 朱善峰 

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111

出　　处：《电焊机》2017年第3期79-83,共5页Electric Welding Machine

摘　　要：高速列车转向架服役环境复杂,易受到大气腐蚀,通常使用耐候钢作为转向架材料。SMA490BW耐候钢以普通碳素钢为基础,添加了耐大气腐蚀的Cu、P、Cr、Ni等元素,具备较好的耐腐蚀性。采用激光-MAG复合焊及MAG焊,针对SMA490BW接头性能、微观组织及合金元素波动进行研究。结果表明,复合焊接头组织核力学性能优于MAG焊接接头,且合金元素成分波动较小,在转向架焊接中可实现对MAG焊接工艺的替代和优化。The research on bogie has been a key issue. Because of a complex service environment and atmospheric corrosion,weather- resistance steel is usually taken as the bogie material. Compared with ordinary carbon steel,elements with good corrosion resistance, such as Cu, P,Cr and Ni, have been added to SMA490BW weather-resistance steel. As for SMA490BW weather-resistance steel,laser- MAG hybrid welding has the advantages of high efficiency,small welding deformation and lower residual stress level. In this paper,the mechanical properties,microstructure and the variety of alloy elements of SMA490BW weather-resistance steel welded joints by different welding method were investigated. The resuhs illustrated that the microstructure and mechanical properties of hybrid welded joints were superior to those of MAG welded joints,and the alloy elements fluctuation was smaller. Therefore,laser-MAG hybrid welding is the substitution and optimization of MAG welding.

关 键 词：SMA490BW耐候钢 激光-MAG复合焊 接头组织 合金元素 

分 类 号：TG456.7[金属学及工艺—焊接]