Introduction to Overlay Welding and Overlay Welding Applications

Overlay welding is a technique that uses welding techniques to deposit filler metal onto the surface of a metal material or component. Specific surface properties and surface dimensions can be obtained through overlay welding.

The use of overlay welding is often aimed at extending the service life of equipment or parts. Overlay welding is widely used in the manufacturing or repair of parts with wear resistance, corrosion resistance, or special performance requirements. In a few cases, overlay welding is also used solely for the purpose of restoring part dimensions. Surfacing welding has the following functions or both: it can improve wear resistance and corrosion resistance, thereby extending the service life of the parts; Facilitate the production of a hard metal surface on a resilient base material to achieve the best performance combination; Economically utilizing precious alloy elements to reduce manufacturing costs; Can save maintenance and replacement parts costs for enterprises; Sometimes it can also improve the efficiency of equipment and reduce power consumption. Nowadays, overlay welding is widely used in the manufacturing and repair of mining, metallurgy, agricultural machinery construction power stations, railways, vehicles, petroleum, chemical equipment, tools, molds, etc

To apply welding technology to production, two problems must be solved: first, selecting welding materials, and second, selecting appropriate welding methods and developing corresponding welding processes. The selection of welding materials includes selecting the composition of the welding alloy and the shape of the welding material.