S355J2W钢焊接接头的组织和力学性能  

Microstructure and mechanical properties of S355J2W steel welded joint

作　　者：赵忠成 李晓娜[2] 

机构地区：[1]中车长春轨道客车股份有限公司,吉林长春130062 [2]成都纺织高等专科学校机械工程与自动化学院,四川成都610031

出　　处：《电焊机》2016年第12期93-95,共3页Electric Welding Machine

摘　　要：S355J2W低合金钢是高速列车转向架构架所用材料之一。针对国产S355J2W低合金钢焊接接头,通过拉伸、弯曲、冲击、硬度、金相和扫描电镜等试验方法研究其力学性能和显微组织。结果表明:采用JM55-Ⅱ焊丝对S355J2W钢进行焊接,焊接接头具有良好的力学性能,其制定的焊接工艺切实可行。S355J2W low alloy steel is one of the materials used in the railway vehicle bogie frame. In the paper,the mechanical properties of S355J2W low alloy steel MAG butt joints of a high speed train bogie are tested by tensile,bending and impact test,and the hardness of the welded joints are also measured. The microstructure and fracture morphology of the joints are observed. The test results show that the JM55- Ⅱ welding wire for S355J2W steel welding, welding joint has good mechanical properties, its welding process is feasible.

关 键 词：转向架 S355J2W钢 JM55-Ⅱ焊丝 MAG焊接头 低温性能 

分 类 号：TG407[金属学及工艺—焊接]