Cylinder piston rod is a connecting part that supports the piston to do work. It is mostly used in the hydraulic oil cylinder and cylinder movement execution part. It is a moving part with frequent movement and high technical requirements.Taking hydraulic cylinder as an example, it is composed of cylinder barrel, piston rod (cylinder rod), piston and end cover.The quality of its processing directly affects the life and reliability of the whole product.
After quenching and tempering treatment, the piston rod obtained good comprehensive mechanical properties and prepared for subsequent surface treatment.The purpose of surface quenching is to obtain high surface hardness to support the surface chrome-plated layer, so as to improve the wear resistance and corrosion resistance of piston rod.Stress relief annealing is arranged before electroplating after grinding to fully eliminate the residual stress inside the piston rod, improve the coating quality and product qualification rate, and improve the service life of the piston rod.After the piston rod heat treatment can effectively improve the wear resistance and hardness of the piston rod surface, effectively reduce the possibility of cracking after quenching.
