激光介入不锈钢自保护药芯焊丝MAG电弧堆焊熔滴受力分析

Force analysis of droplet in MAG arc surfacing with stainless steel self-shielded cored wire as laser intervened

关键词:  激光技术  熔滴受力  自保护药芯焊丝

Key words:  laser technique  droplet force  self-shielded flux cored wire

摘要:

以不锈钢自保护药芯焊丝为研究对象，借助高速摄像采集了激光介入MAG电弧堆焊的熔滴和电弧图像，研究了激光介入不锈钢自保护药芯焊丝MAG电弧堆焊的熔滴受力. 结果表明，激光的介入改变了焊丝端头熔化状态，焊丝端头发生局部熔化、半熔熔化、全熔熔化三种状态；增大了电磁收缩力、等离子流力在焊丝轴线上的分力，有利于熔滴过渡；减小了表面张力，有利于细化熔滴；增加了气体动力，在合适的激光参数下促进熔滴过渡；熔滴过渡轨迹出现了右偏轴过渡、左偏轴过渡、沿轴过渡三种模式.

Abstract:

Selecting the stainless steel self-shielded flux cored wire as research subject, the pictures of droplet and electric arc were taken using high-speed photography and force on the droplet was analyzed during MAG surfacing intervened by laser. The results showed that laser intervening changed melted state of end of the wire. The melted states were partial melting, half melting and dead melting. Laser intervening made electromagnetic pinch force and the components of plasma flow force in axial line of wire increase, which were beneficial to droplet transfer. Laser intervening made surface tension force reduce, which was beneficial to tessellate droplet. Laser intervening increased atmosphere dynamics and promoted droplet transfer in appropriate laser parameter. The track of droplet transfer had three patterns which were right shaft transfer, left shaft transfer and along the shaft transfer.