A kind of surface treatment, according to the need to use a certain diameter of steel shot on the surface of parts, forming uniform small pits, in order to improve the surface fatigue strength of the chain.
After the parts are heated to a certain temperature, they are cooled by chemical water solution and saponified to make the surface color of parts appear blue. After blue treatment of the chain appearance beautiful, but also the role of rust.
The parts are immersed in a certain temperature phosphating solution to form a phosphating layer on the surface of the parts, which can make the surface color of the parts appear black or gray, improve the beauty of the chain and achieve the purpose of anti-corrosion. These phosphating solutions can be recycled and have less environmental pollution.
Plate with nickel
Nickel coating is formed on the surface of parts by electroplating or electroless nickel plating. The nickel coating can not only beautify the chain, but also prevent corrosion. Nickel chain - generally used in open air.
Zinc coating is formed on the surface of parts by electroplating or chemical galvanizing. The zinc coating can not only beautify the chain, but also prevent corrosion. Galvanized chains are generally suitable for outdoor use.
In heat treatment equipment, various auxiliary media are used at high temperature to improve the structure and physical properties of parts.