Welding tool is a process in which materials with certain properties are cladding on the surface of the workpiece by welding. The difference with 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, and corrosion resistance, or to repair the workpiece (recovering serious wear and processing errors caused by The size is insufficient).
Characteristics of welding:
(1) The combination of the welding layer and the base metal is a metallurgical combination, with high bonding strength and good impact resistance;
(2) It is convenient to adjust the composition and performance of the welding layer metal; generally, the commonly used electrode arc welding surfacing electrode or flux-cored electrode adjustment formula is very convenient, and various alloy tools can be designed to meet the requirements of 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 conditions.
(4) Cost saving and good economy;
(5) Since the welding technology is to increase or restore the size of the parts by welding, or to obtain an alloy layer with special properties on the surface of the parts, it is not difficult for those who can master welding and surfacing technology. , Strong operability. It is widely used in the repair and manufacturing of parts in metallurgy, mining, electric power, agriculture, petroleum and other industries.
