异种金属焊接构件腐蚀疲劳性能研究  

Study on Corrosion Fatigue Performance of Dissimilar Metal Welded Components

作　　者：郝雪龙 禄璐 张东晖 吴磊 Hao Xuelong;Lu Lu;Zhang Donghui;Wu Lei

机构地区：[1]国家有色金属及电子材料分析测试中心,国标(北京)检验认证有限公司,北京101407

出　　处：《大型铸锻件》2022年第6期79-82,共4页Heavy Casting and Forging

基　　金：国家科技部重点研发计划(2020YFF0218202)。

摘　　要：选用SUS304不锈钢材料,采用MAG(135)焊接方法将其与低合金钢Q345B进行焊接,结合腐蚀疲劳环境加载装置研究了焊接件的腐蚀疲劳性能,并对断口进行电镜观察。研究发现腐蚀疲劳裂纹扩展源于表面腐蚀缺陷,且断口的腐蚀疲劳裂纹扩展区域、条带特征明显,为典型的腐蚀疲劳断裂。In this study,SUS304 stainless steel has been welded with low alloy steel Q345B by MAG(135)welding method.The corrosion fatigue properties of the weldments have been studied by using a corrosion fatigue environment loading device,and the fracture surfaces have been observed by electron microscope.It has been found that the corrosion fatigue crack propagation originates from the surface corrosion defects,and the corrosion fatigue crack propagation area and strip characteristics of the fracture are obvious,which is a typical corrosion fatigue fracture.

关 键 词：异种金属焊接 SUS304不锈钢 Q345B 腐蚀疲劳 

分 类 号：O346.21[理学—固体力学]