The cylinder tube is processed by rolling . Because the surface layer leaves the surface residual compressive stress , it helps to close the micro cracks on the surface and hinder the expansion of corrosion. Thereby improving the surface corrosion resistance, and can delay the generation or expansion of fatigue cracks, thereby improving the fatigue strength of the cylinder tube. Through roll forming, a cold work hardened layer is formed on the rolled surface , which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the inner wall of the cylinder tube and avoiding burns caused by grinding. After rolling, the surface roughness value is reduced, which can improve the mating properties.
https://www.ht-tube.com/