Study on formation,microstructure and properties of weldin friction stir welding for ZL102 aluminum alloy plate

ZL102铝合金搅拌摩擦焊焊缝成形及组织性能研究 Study on formation,microstructure and properties of weldin friction stir welding for ZL102 aluminum alloy plate 温雨 WEN Yu 1 first-author 金玉花 JIN Yuhua 2 内蒙古交通职业技术学院汽车工程系 内蒙古交通职业技术学院汽车工程系 Transportation Vocational Technical College of Inner Mongolia,Department of Automotive Engineering Transportation Vocational Technical College of Inner Mongolia,Department of Automotive Engineering 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室 State Key Laboratory of Gansu New Non-ferrous Metal Materials,Lanzhou University of Technology State Key Laboratory of Gansu New Non-ferrous Metal Materials,Lanzhou University of Technology 采用搅拌摩擦焊对15 mm厚ZL102铝合金进行焊接,观察焊缝成形并分析接头微观组织和力学性能。结果表明:在文中试验条件下,旋转速度900 r/min、焊接速度50 mm/min时可获得成形良好的焊缝;焊核区组织晶粒相对母材发生显著细化,为细小的等轴晶组织;焊接接头显微硬度在横截面方向呈非中心对称分布,最高值位于偏离焊缝中心的前进侧焊核区,在板厚方向显微硬度呈逐渐下降趋势,轴肩作用区硬度最大,底部最低。 Friction stir welding process is used to weld ZL102 aluminum alloy with the thickness of 15 mm.The formation of weld is observed and the microstructure and properties of the joints are analyzed.The results show that under this experimental condition,the weld is well formed at the rotating speed of 900 r/min andwelding speed of 50 mm/min.The microstructure grain in the nugget zone is finer than that in the base metal,which is fine equiaxed grain.The microhardness of welded joint asymmetrically distributes along the weld center,and the maximum microhardness is in the weld nugget zone on forward side deviating from the weld center.And the microhardnessin the plate thickness direction gradually declines,which means the hardness of shoulder function zone is maximum and that of bottom is minimum. 搅拌摩擦焊 焊缝成形 微观组织 显微硬度 friction stir welding formation of weld microstructure microhardness TG453.9 2022-03-08 12 50