摘要
以AZ31B变形镁合金为主要对象,研究了其激光-TIG复合热源缝焊工艺特点,探讨了缝焊表面成形、缝焊熔深的影响因素以及缝焊缝的抗剪强度变化规律。结果表明,激光-TIG复合缝焊的焊缝为明显的“图钉型”形貌,上部分为TIG电弧焊接成形,下部分为典型的激光焊接成形。镁合金复合热源缝焊具有焊接速度高、焊缝成形美观、焊接参数范围较宽等特点,接头抗剪强度较高,是一种优良的焊接方式。
Wrought magnesium alloy AZ31B was welded with laser-TIG (tungsten inert-gas) hybrid overlap welding process and the surface appearance of the bead, the influencing factors of the penetration and shear strength were discussed. The results show that the bead evidently presents pin shape when welded by laser-TIG hybrid overlap welding. The top of bead is the typical shape when welded with TIG process, while the bottom of bead showed the typical shape of laser welding. It was a good way to weld magnesium alloy by using the laser-TIG hybrid welding with advantages high welding speed, aesthetic bead form, comparative wide welding parameters and high shear strength of joints.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2005年第3期21-24,共4页
Transactions of The China Welding Institution
基金
国家高技术研究发展专项经费(863计划.2002AA331160)资助项目
关键词
镁合金
激光-钨极氩弧
复合热源缝焊
抗剪强度
Automobile manufacture
Inert gas welding
Laser beam welding
Magnesium alloys
Shear strength
Sheet metal
Soldered joints
