薄板铝合金空间曲线焊缝CMT焊接试验研究  

Study on Cold Metal Transfer(CMT) Welding of Aluminium Alloy Sheet with Space Curve Weld

作　　者：田志杰[1] 熊林玉[1] 李延民[1] 周庆[1] 杜岩峰[1] 李鸣钺 

机构地区：[1]首都航天机械公司,北京100076

出　　处：《压力容器》2015年第4期22-28,共7页Pressure Vessel Technology

摘　　要：针对薄板铝合金三维曲线焊缝较大的残余应力和焊接变形,进行了冷金属过渡(CMT)无垫板自动焊试验研究,分析了电流、焊接速度、弧长修正、保护气流量对焊接过程的影响,进行了接头拉伸性能试验及焊缝微观组织研究,并焊接了变形小的产品。结果表明,利用合理的焊接参数,可实现厚度1.5 mm的5A06铝合金的无垫板CMT焊接,焊缝成形稳定均匀,焊接接头抗拉强度值达到347 MPa,接头断裂位置在热影响区。无垫板CMT焊接技术可用于薄板铝合金空间曲线焊缝的焊接。For the higher residual stress and distortion of aluminium alloy sheet with three-dimensional weld distortion was manufactured. The results show that 1.5 mm thick 5A06 aluminium alloy three-dimen- sional curve weld can be achieved by reasonable no-hner plate CMT parameters. The weld shape is stable and uniform, tensile strength reached 347 MPa, fracture occurred in HAZ. No-liner plate CMT welding technology can be used in space curve welding for the aluminium alloy sheet.

关 键 词：冷金属过渡 5A06铝合金 拉伸性能 无垫板焊接 曲线焊缝 薄板 

分 类 号：TH131.2[机械工程—机械制造及自动化] TG457.1[金属学及工艺—焊接]