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How to choose the material of quenched and tempered piston rod
In order to increase the service time of the piston rod and reduce the wear of the piston rod, 38crmoalan alloy structural steel is selected as the blank.
What is the processing technology of piston rod?
The piston rod is produced by rolling, because the residual compressive stress in the surface layer is left in the surface layer, which is conducive to the closure of the micro cracks in the surface layer and hinders the development of sedimentation. In order to improve the surface corrosion resistance, the piston rod can slow down the fatigue crack or expansion, so as to improve the fatigue limit of the hydraulic cylinder rod. According to the rolling forming, a layer of cold work hardening layer is produced on the rolling surface layer, which reduces the ductility and plastic deformation of the cutting pair touching the surface layer, thus improving the wear resistance of the surface layer of the hydraulic cylinder rod and preventing the scald caused by cutting. After rolling, the reduction of roughness value can improve the matching characteristics. Together, the friction damage to the seal ring or hydraulic seal is reduced when the rod piston of the hydraulic cylinder moves, and the overall service life of the hydraulic cylinder is improved.
The effect of the piston rod is closely related to its hardness.
The use effect of piston rod has a great relationship with its hardness. In today's industrial processing, there are some adopted standards. If it can meet the rolling processing, it basically meets the hardness requirements. Because in industrial production, there is a strong effect requirement for the use details of this kind of piston rod. If you want to meet the use effect, you should pay attention to the quality of the surface layer of the piston rod.
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