摘要
焊丝的熔化速率及焊缝的熔深不仅与热输入有关,而且与焊接的过渡形式及熔滴温度相关。在相同的热输入情况下,直流CMT(DC CMT)与脉冲MIG(P-MIG)以一定的比例组合实现混合过渡焊,使焊丝的熔化量、焊缝的熔深、熔宽发生变化。结果表明,DC CMT焊时焊丝的比熔化量最大,P-MIG焊时焊丝的比熔化量最小;DC CMT焊的熔深最大。焊接铝合金时,通过调整DC CMT与PMIG的比例,可以避免出现焊接熔合不良、烧穿及熔池下塌现象。
The factors which affect the melting rate of welding wire and weld penetration is not only the welding line energy,but also the droplet-transfer and temperature of drop.Under the same heat input,DC CMT welding and PMIG welding with certain proportion for mix droplet-transfer,which there were some changes of welding wire melting,weld penetration and weld width.The results showed that the fusion quality of welding stick of DC CMT welding was the most and P-MIG welding was the minimum.The weld penetration of DC CMT welding was the deepest,and with the increase of pulse(excluding P-MIG welding),the weld penetration was became lower.When aluminium alloy was welded in order to avoid having problem of poor fusion,burn-through and beam sinking by adjusting the proportion of DC CMT welding and P-MIG welding.
出处
《焊接技术》
2015年第1期26-29,6,共4页
Welding Technology
基金
国家自然科学基金资助项目(51005069
51205106)
先进焊接与连接国家重点实验室开放课题资助项目(AWPT-M12-03)
四方股份工艺开发资助项目
