The advantages of using the piston rod and the main processing materials
May 30, 2022
The quality of the piston rod in the process of processing will directly affect the quality and service life of the piston rod. The processing of the piston rod is generally carried out by rolling, because this processing method can improve the corrosion resistance of the surface of the piston rod, delay the generation and expansion of fatigue cracks, and thus improve the fatigue strength of the piston rod. In addition, by rolling, the surface roughness can also be reduced, and the occurrence of wear can be reduced, so that the service life of the piston rod can be extended as a whole.
Advantages of using the piston rod
1. Notch clearance: mainly used to compensate for the wear of the packing ring.
2. Axial clearance: It is mainly used to ensure that the packing ring can float freely, otherwise the piston rod cannot work normally.
3. Radial clearance: avoid the compression of the packing ring due to the sinking of the piston rod, so as to avoid deformation or damage.
The piston rod is mainly made of the following materials
1. 45# steel:
Generally speaking, the production of piston rod is made of 45# steel. 45# steel is a high-quality carbon structural steel with low hardness and easy cutting. After quenching, its surface hardness can reach 45-52HRC. Moreover, it can also have good cutting performance and comprehensive mechanical properties such as high strength and toughness, so it is one of the commonly used materials for shaft parts.
2. 40Cr steel:
40Cr steel is also a commonly used material in the production of piston rods. It is not only a medium carbon quenched and tempered steel, but also a cold heading die steel. It has good comprehensive mechanical properties and is generally suitable for the manufacture of shaft parts with medium precision and high speed. Therefore, it is often used in piston rods with large impact force and heavy load transmission requirements, because it can effectively ensure that the piston rod has sufficient working strength.
3. Stainless steel material:
Stainless steel is a material used in the production of piston rods, and it is resistant to weak corrosive media such as air, steam, and water. The commonly used materials are 304, 316, and 402. The weldability, polishability, heat resistance, corrosion resistance and corrosion resistance of these materials are relatively good. All technical indicators meet and exceed standards, so they are often used in oil cylinders, cylinders and shock absorbers.
