1. 45 steel
Under normal circumstances, if the load on the piston rod is not very large, 45# steel is usually used for manufacturing. Because 45# steel is a commonly used medium-carbon quenched and tempered structural steel, it has high strength and good machinability. Especially when the welded roller frame has undergone appropriate heat treatment, it can obtain a certain degree of toughness and plasticity. and wear resistance, so it is one of the more commonly used materials for piston rod processing.
2. 40Cr steel
If the piston rod is under heavy load, it is generally made of 40Cr steel. Because 40Cr steel is a medium carbon quenched and tempered steel with good hardenability and low temperature impact toughness. Especially when it is quenched and tempered, it can have good comprehensive mechanical properties, and the hardness can reach between 32-36HRC, that is, between 301-340HB. This can ensure that the piston rod can have sufficient working strength. Therefore, piston rods made of 40Cr steel are often used in piston rods with large impact forces and heavy load transmission requirements.
3.Gcr15.
GCr15 steel is a high-carbon chromium bearing steel with a low alloy content. It has relatively high hardenability and can obtain high and uniform hardness after heat treatment. When it is quenched and tempered at low temperature, it can have higher hardness, uniform structure, good wear resistance and relatively high contact fatigue performance. It is highly sensitive to the formation of white spots and has temper brittleness.
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