A variety of roll surface treatment technologies improve roll performance
In steel rolling production, roll surface treatment is the core technology that determines the quality and production efficiency of steel. In view of complex working conditions such as hot rolling high temperature wear and cold rolling precision forming, modern roll surface treatment technology provides protection for working rolls in different aspects.
The surface quenching treatment technology is to increase the hardness of the roll surface to HRC55-65 through induction heating quenching to strengthen the wear resistance; The hard chrome plating process is to form a dense chromium layer (thickness 50-100μm) on the surface of the cold roll to improve corrosion resistance and surface finish, and ensure the rolling accuracy of thin sheets; The surfacing repair technology is to use high-alloy welding wire (such as high-chromium cast iron, tungsten carbide) to surlay the wear area, which can restore the size of the roller surface and form a wear-resistant layer, in addition to laser cladding technology through in-situ repair of nanoalloy coating to achieve performance reconstruction of the wear area.
The choice of surface treatment process requires a combination of rolling materials (e.g. carbon steel, stainless steel), rolling process (hot/cold rolling) and wear form. Advanced processing technology not only reduces the frequency of roll replacement, but also improves the surface quality of steel, helping enterprises reduce costs and increase efficiency. Through customized surface treatment solutions, it can effectively cope with complex working conditions such as high load and strong corrosion, which is an important direction for the technological upgrading of the steel rolling industry.