6061铝合金FSW接头组织与耐蚀性能的研究  

Study on Microstructure and Corrosion Resistance of 6061 Aluminium Alloy Friction Stir Welded Joint

作　　者：王淼[1] 李天景[1] 黄婷婷 曾一达 WANG Miao;LI Tianjing;HUANG Tingting;ZENG Yida(School of Automobile and Transportation,Yancheng Vocational&Technical Institute of Industry,Yancheng 224002,China;School of Aeronautical Manufacturing Engineering,Nangchang Hangkong University,Nangchang 330063,China)

机构地区：[1]盐城工业职业技术学院汽车与交通学院,江苏盐城224002 [2]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《热加工工艺》2024年第15期31-34,共4页Hot Working Technology

基　　金：江苏省高等学校自然科学研究面上项目(21KJD430003);江苏省大学生创新创业训练计划立项项目(202113752010Y);江苏省现代教育技术研究课题(2021-R-92586)。

摘　　要：对4 mm厚的6061-T6铝合金板进行了搅拌摩擦焊接,通过浸泡腐蚀试验和电化学腐蚀试验研究焊缝腐蚀性能,采用金相显微镜、透射电镜等观察接头的微观组织。结果表明:6061铝合金FSW焊核区晶粒显著细化,晶界第二相较少;焊核区的耐剥落腐蚀和晶间腐蚀性能优于热影响区的;焊核区比热影响区的腐蚀电位较高,腐蚀电流密度较小,焊核区表现出更好的耐腐蚀性能。The friction stir welding of 4 mm thick 6061-T6 aluminum alloy plate was carried out.The corrosion behavior of the weld area was studied by immersion corrosion test and electrochemical corrosion test,and the microstructure of the joint was investigated by using optical microscopy and TEM.The results show that the grain in FSW nugget area of 6061 aluminum alloy is significantly refined,and the content of the second phase at grain boundary is small;the resistance to exfoliation corrosion and intergranular corrosion of the nugget area is better than that of heat affected zone.Compared with the heat affected zone,the nugget zone has higher corrosion potential and lower corrosion current density,which shows better corrosion resistance.

关 键 词：6061铝合金 搅拌摩擦焊 焊核区 耐蚀性能 

分 类 号：TG453.9[金属学及工艺—焊接] TG146.21[一般工业技术—材料科学与工程]