外加磁场作用下焊接方法的研究进展

Research progress of welding method under external magnetic field

当前工业生产对焊接技术提出更高的要求,传统焊接方法的优化改进受到广泛关注。外加磁场作用于电弧等离子体会导致电弧行为发生显著改变,从而影响熔滴过渡和熔池形成过程,最终影响焊缝成形和接头质量。阐述外加磁场作用下焊接行为的研究进展,包括外加磁场对电弧形态和参数分布、熔滴过渡过程、熔池的形成和焊缝成形的作用规律。与传统焊接相比,外加磁场下熔滴过渡频率增加,焊缝组织晶粒更加细小均匀,接头的力学性能得到提升。

Curren t industrial production has put forward higher requirements for welding technology,the optimization of traditional welding methods attracts more and more attention. The external magnetic field acting on the arc plasma will cause a significant change in the arc behavior,which affects the droplet transfer and the forming process of molten pool and ultimately influences the appearance of weld and the quality of welded joint. The research progress of welding behavior under the external magnetic field is mainly introduced,including the effects of external magnetic field on arc morphology,parameter distribution,droplet transfer process,and the formation of molten pool and the appearance of weld. Comparing with the traditional welding,under external magnetic field,the droplet transfer frequency increases,the grain of the weld microstructure is more fine and uniform,and the mechanical properties of welded joint improves.