Effect of Different Magnetic Field Types on Microstructure and Properties of Deposited Metal Prepared from High-Strength Steel Wire

In this paper, 800 MPa high-strength steel wire is used to prepare a kind of deposited metal with good toughness by magnetic field-assisted MAG welding. A high-speed camera is used to observe the arc morphology and melt drop transition during the welding process assisted by different types of magnetic field. The microstructure evolution of deposited metal is characterized by means of OM and EBSD, whose effects on mechanical properties also are analyzed. The results show that the transverse magnetic field can change the arc morphology and melt droplet trajectory, reduce the formation of PF, and refine the grain size. The low-temperature impact toughness of deposited metal is increased to 128 J, with a 28