AZ31镁合金搅拌摩擦点焊  

Friction stir spot welding of AZ31 Mg-alloy

作　　者：尹玉环[1,2] 胡绳荪[1,2] North T.H. 张晓博[4] 孙娜[5] 

机构地区：[1]天津大学材料科学与工程学院,天津300072 [2]天津市现代连接技术重点实验室,天津300072 [3]多伦多大学,材料科学与工程学院,多伦多N5S3E4 [4]上海宝钢铸造有限公司,上海201900 [5]吉林大学教育部汽车材料重点实验室,长春130025

出　　处：《焊接学报》2011年第3期101-104,118,共4页Transactions of The China Welding Institution

摘　　要：研究了搅拌头旋转频率以及停留时间对AZ31镁合金搅拌摩擦点焊接头力学性能的影响.随着旋转频率的增大,不同搅拌针条件下,AZ31搅拌摩擦点焊接头的力学性能均呈现先增大后减小的趋势.随着停留时间的延长,AZ31搅拌摩擦点焊接头的力学性能先增大随后在一定范围内波动.结果表明,结合宽度是影响搅拌摩擦点焊接头力学性能的重要因素,结合宽度越大,点焊接头的力学性能越好;此外,上下板之间界面特征对搅拌摩擦点焊接头的力学性能也具有重要的影响.The influences of tool rotational speed and dwell time on the mechanical properties of AZ31 friction stir spot welds were investigated.Along with the increase in tool rotational speed,the mechanical properties of AZ31 friction stir spot welds which were made by different tool designs increased first and then decreased.Along with the increase of dwell time,the mechanical properties of AZ31 friction stir spot welds increased first and then kept relatively constant.Bonded width affected the properties of friction stir spot welds significantly.The bigger the bonded widths,the better the properties of the friction stir spot welds were.In addition,the feature of the interface between the upper and the lower sheet also had an important influence on the properties of AZ31 friction stir spot welds.

关 键 词：搅拌摩擦点焊 力学性能 旋转频率 停留时间 结合宽度 

分 类 号：TG407[金属学及工艺—焊接]