Welding tool is a process of cladding materials with certain properties on the surface of workpieces by welding method. The difference from welding is that surfacing is not to connect the workpiece, but to strengthen the surface performance of the workpiece to obtain a cladding layer with special properties such as wear resistance, heat resistance, corrosion resistance, or repair the workpiece (recovery of the workpiece is caused by serious wear and processing errors). Of insufficient size).

Characteristics of welding:
(1) The combination of the welding layer and the base metal is metallurgical, with high bonding strength and good impact resistance;
(2) The adjustment of the composition and performance of the welding layer metal is convenient; the adjustment formula of the commonly used electrode arc welding surfacing electrode or flux cored electrode is very convenient, and various alloy tools can be designed to adapt to different working conditions.
(3) The thickness of the welding layer is large, and the welding layer is generally adjusted within 2-20mm, which is more suitable for severe wear.
(4) Cost saving and good economy;
(5) Since the welding technology is to increase or restore the size of the part through welding, or to obtain an alloy layer with special properties on the surface of the part, it is not difficult for those who are skilled in welding and surfacing technology , Strong operability. Widely used in the repair and manufacture of parts in metallurgy, mining, power, agriculture, petroleum and other industries.