Process requirements for cylinder liners_Yucheng Wantong Power Machinery Parts Co., Ltd

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Process requirements for cylinder liners

2022-11-17 15:17

The cylinder liner should have sufficient strength, rigidity and heat resistance, and should also have good wear resistance. There should be good lubrication and cooling during work.

Mazda R2 Cylinder Liner

The cylinder liner is generally made of wear-resistant alloy cast iron containing phosphorus or boron, such as HT25-47, HP-CuCrMo, etc. The inner surface of the cylinder liner is sometimes chrome-plated (pine hole chrome-plated, oil storage network point chrome-plated), nitriding or phosphating to improve wear resistance. The hardness of the inner surface of the cylinder liner is usually required to be greater than HB200, and has a good match with the hardness of the piston ring. The inner surface should also have appropriate roughness, so that it has a certain oil storage capacity and running-in performance. The inner surface should have sufficient roundness and cylindricity accuracy, and the mounting support surface should have higher position accuracy in the center of the inner hole.
The inner surface of the cylinder is easily worn due to the action of high-temperature and high-pressure gas and contact with the high-speed moving piston. In order to improve the wear resistance of the cylinder and prolong the service life of the cylinder, there are different cylinder structures and surface treatment methods. There are three types of cylinder structure: no cylinder liner type, dry cylinder liner type, wet cylinder liner type.

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