The use of automatic welding technology provides roller body repair, surface strengthening, and functional coatings for steel mills' pinch rollers, auxiliary rollers, continuous casting rollers, hot straightening rollers, and other roller bodies, effectively restoring the size of the roller bodies and extending their service life. This technology has been widely applied in steel mills such as Maanshan Iron and Steel, New Steel, and Lianyungang Iron and Steel.

　　Walking welding technology uses the arc between the welding wire and the workpiece as a heat source to melt the welding wire, flux, and base metal under a protective and alloying flux layer, forming a repair layer or functional protective coating.

　　By selecting and proportioning welding wires, fluxes, and surfacing processes, as well as pre weld and post weld heat treatment processes, a series of wear-resistant surfacing layers with complete metallurgical reactions, high metal purity, ideal alloy composition, and hardness ranging from HRC35 to HRC62 can be efficiently prepared. The coating has excellent fatigue resistance, wear resistance, and corrosion resistance, effectively extending the service life of the workpiece.