摘要
提出了激光-数字化精确控制短路过渡电弧复合热源焊接新方法。以CMT(Cold Metal Transfer)电弧焊和激光-CMT复合热源焊接为例,利用304不锈钢平板堆焊,对比分析了CMT电弧焊及激光-CMT电弧复合热源的焊缝成形特点,研究了在采用纯Ar保护气体焊接304不锈钢时的激光-CMT电弧复合热源焊接过程稳定性、飞溅、焊缝成形特征、焊接效率及焊接接头的力学性能,并将试验结果与304不锈钢TIG填丝焊进行对比。分析结果表明,纯Ar保护激光-CMT复合热源焊接接头的综合力学性能与TIG填丝焊接头的综合力学性能相当,但焊接效率可以提高5倍,因此在不锈钢和镍基合金等高性能金属材料的焊接中,用纯Ar保护的激光-CMT电弧复合热源焊接取代TIG填丝焊具有可行性。
Laser-digital controlled short circuiting transfer arc hybrid welding was brought forward in this paper.Taken CMT(Cold Metal Transfer) welding and laser-CMT hybrid welding of 304 stainless steel for example,the characteristics of weld appearance between CMT weld and laser-CMT hybrid weld were compared.In experiment the laser-CMT hybrid welding with argon as shielding gas was studied,and CMT arc stability,weld appearance,welding efficiency and mechanical properties of joints were analyzed.Results indicated that the mechanical properties of the joints were as good as those of TIG welding with filler wire,when the welding efficiency of laser-CMT hybrid welding was 5 times higher than that of TIG welding with filler wire.Thus it is possible that laser-CMT hybrid welding with argon shielded replaces TIG welding with filler wire in stainless steel and nickel base alloy welding.
出处
《焊接》
北大核心
2009年第5期23-26,共4页
Welding & Joining
基金
机械科学研究总院院技术发展基金资助项目(20080601)
