焊接速度对Al-Zn-Mg高强铝合金搅拌摩擦焊接头组织及力学性能的影响  

Effect of Welding Speed on Microstructure and Mechanical Properties of Al-Zn-Mg Alloy Friction Stir Welding

作　　者：马志华[1,2] 刘桂强[1,2] 陈东高[1,2] 马冰[1,2] 李娜[1,2] 郭海林[1,2] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]山东捷科采油设备有限公司,山东东营8180826

出　　处：《热加工工艺》2014年第19期179-180,183,共3页Hot Working Technology

摘　　要：针对10 mm厚的7A05铝合金采用搅拌摩擦焊接技术进行单道焊接试验,利用光学显微镜等工具对焊接接头组织及力学性能等进行了研究,结果表明:在转速一定时,随着焊接速度的增加,可以细化焊接接头焊核区的微观组织;焊接接头的抗拉强度随着焊接速度的增加先增加而后基本稳定,而屈服强度随着焊接速度的增加,无明显变化。7A05 aluminum alloy with 10 mm thickness was welded by friction stir welding. The microstructure and mechanical properties of the welded joint was researched by optical microscope, etc. The results show that ： the microstructure of the weld nugget zone are refined as the welding speed increasing when the rotate speed is constant. As the welding speed increasing, the strength of extension of the welded joint increases first and then stable basically. The yield strength has no obvious change.

关 键 词：7A05铝合金 搅拌摩擦焊 微观组织 力学性能 

分 类 号：TG453.9[金属学及工艺—焊接]