摘要
基于双轴肩搅拌摩擦焊热输入的理论分析,建立了焊接工具结构尺寸特征值与待焊工件厚度之间的工程模型.利用该工程模型,设计并优化得到适用于厚度为2.5 mm的6061-T6铝合金薄板的双轴肩搅拌摩擦焊工具.使用该工具对中空薄壁型材进行焊接,并对焊接工艺参数进行优化.结果表明,当焊接工具转速为1000 r/min、焊接速度为600 mm/min时,可以得到综合力学性能最佳的焊接接头,其中正面焊缝焊接接头抗拉强度可达231 MPa,为母材抗拉强度的77%,弯曲角度达180°;反面焊缝焊接接头抗拉强度可达226 MPa,为母材抗拉强度的76%,弯曲角度达180°.
An engineering model between characteristic value of welding tool and specimen thickness was established based on heat input theoretical analysis of bobbing tool friction stir welding.According to this model,a welding tool was designed and optimized,which was used for join 2.5 mm thinwalled extrude profile of 6061-T6 aluminum alloy.Friction stir welding parameters were optimized as well.When the rotation speed of the tool was 1000 r/min and welding speed was 600mm/min,the joint obtained a maximum mechanical properties.The front side joint had a tensile strength of 231 MPa,77%of the base material,and a bend angle of 180°,while the back side joint had a tensile strength of 226 MPa,76%of the base material,and a bend angle of 180°.
作者
张颖川
马国栋
代鹏
王敬水
金炜
ZHANG Yingchuan;MA Guodong;DAI Peng;WANG Jingshui;JIN Wei(Beijing Zhongheng Electro-Mechanical Technology Co.,Ltd.,Beijing,100091,China;Locomotive&Car Research Institute,China Academy of Railway Sciences Co.,Ltd.,Beijing,100081,China)
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2022年第6期88-95,I0008,共9页
Transactions of The China Welding Institution
基金
中国铁道科学研究院集团有限公司院基金重点课题(2019YJ021)。
关键词
双轴肩搅拌摩擦焊
6061-T6铝合金
中空薄壁型材
焊接工具设计
bobbing tool friction stir welding
6061-T6 aluminum alloy
thin-walled cavity extrude profile
welding tool design
