Ck45 Hydraulic Piston Bar Hard Chrome Plated Piston Rod Hollow Material Specification Suppliers

The piston rod is the connecting part that supports the piston to do work. It is mostly used in the oil cylinder and the execution part of the cylinder movement. It is a moving part with frequent movement and high technical requirements.

Taking hydraulic cylinder as an example, it is composed of cylinder, piston rod (cylinder rod), piston, end cap, etc., and its processing directly affects the life and reliability of the entire product. Piston rod processing requirements are high, its surface roughness requirements are Ra0.4~0.8um, coaxiality, wear resistance requirements are strict.

Hard chrome plated piston rod by hot rolling, peeling, (induction hardening), surface grinding, hard chrome plated processing. More than ten processes, using CK45, 20MnV6, 42CrMo4, SUS304, SUS316 and other materials made of screw steel.

Accuracy grade f7 tolerance, surface hardness ≥HV900. Chrome-plated layer thickness 20-50 microns optional, salt spray test 60-90 hours. Induction hardening hardness HRC55±2, quenching depth 0.5-3.5mm optional.

Due to the residual compressive stress on the surface of the surface layer, the rolling machining is helpful to seal the small cracks on the surface and prevent the expansion of erosion. Thus, the corrosion resistance of the surface can be improved, and the fatigue crack can be delayed or expanded, and the fatigue strength of the cylinder rod can be improved. 

By rolling forming, the cold-working hardened layer is formed on the rolling surface, which reduces the elastic-plastic deformation of the contact surface of the grinding pair, thus improving the wear resistance of the cylinder rod surface and avoiding the burn caused by grinding. After rolling, the reduction of surface roughness can improve the matching performance.