Effect of transverse magnetic field on weld formation and microstructure & properties of high-speed hot-wire tungsten inert gas welding joints

ABSTRACT

A transverse magnetic field generator combined with high-speed hot-wire tungsten inert gas welding system is used to generate an external magnetic force to adjust the molten pool behaviours and the arc. Owing to the forward external magnetic force is helpful to balance the backward arc shear stress and the stirring of the electromagnetic force on molten pool, the weld formation and joint microstructure are improved, and the corrosion resistance of the joint is increased. The test results show that only a low level of assisted transverse magnetic field (3–5 mT) is able to significantly improve the weld formation, to refine and homogenise the microstructure, and to improve the electrochemical and atmospheric corrosion resistances of welded joints.

KEYWORDS:

• Hot-wire tungsten inert gas welding
• transverse magnetic field
• weld formation
• microstructure
• corrosion resistance

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by Natural Science Foundation of Shandong Province (grant number ZR2018MEE020) and National College Students Innovation and Entrepreneurship Training Program (grant number 201910425015).