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Composite coating piston rod and manufacturing method thereof

A composite coating and manufacturing method technology, applied in the direction of piston rod, coating, metal material coating process, etc., can solve the problems of low surface hardness of piston rod, economic loss of users, surface quenching cracks, etc., and achieve low friction coefficient, The effect of improving the service life and increasing the surface hardness

Active Publication Date: 2014-05-07
SICHUAN JINXING CLEAN ENERGY EQUIP CO LTD +3
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Problems solved by technology

The surface hardness of the piston rod made by this process is low, and the wear resistance is poor
To improve the surface hardness and wear resistance of the piston rod, if the transmission heat treatment method is used to increase the hardness value, surface quenching cracks will often occur and the product will be scrapped, or it will break during the user's application process, causing huge direct or indirect damage to the user. Economic losses

Method used

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  • Composite coating piston rod and manufacturing method thereof

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Composite coating piston rod, including piston rod main body 1, the surface of piston rod main body 1 is a nitrided layer 2, and a composite coating 3 is attached to the outside of the nitrided layer 2, and the composite coating 3 is metal bottom layer 4, hard Coating 5 and solid lubricating surface layer 6; metal bottom layer 4 is a Ti or Cr layer; hard coating 5 is a metal nitride or metal carbonitride layer with a hardness of 20GPa-50GPa and a surface friction coefficient of 0.2-0.5; solid lubrication The surface layer 6 is diamond-like carbon coating, MoS 2 Layer or WS 2 one of the layers. The recommended thickness of the metal bottom layer 4 is 100nm-200nm. The thickness of the hard coating 5 is recommended to be 2 μm-5 μm. The recommended thickness of the solid lubricating surface layer 6 is 80nm-120nm. The recommended materia...

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Abstract

The invention discloses a composite coating piston rod and a manufacturing method thereof, and relates to the field of air compressor piston rods. The composite coating piston rod has high surface hardness and comprises a piston rod body, a nitriding layer is arranged on the surface of the piston rod body, a composite coating is attached outside the nitriding layer, a metal bottom layer, a hard coating and a solid lubrication surface layer are sequentially arranged on the composite coating from inside to outside, the metal bottom layer is Ti or Cr layer, the hard coating is a metal nitride or metal carbonitride layer, the hardness of the metal nitride or metal carbonitride layer is 20GPa-50GPa, the surface friction coefficient of the metal nitride or metal carbonitride layer is 0.2-0.5, the solid lubrication surface layer is one of a diamond-like carbon coating, a MoS2 layer or WS2 layer, and the hard coating, the solid lubrication surface layer and the metal bottom layer are coated by a vapor deposition method. The manufacturing method can be applied to the air compressor piston rods and other parts with surfaces needing high hardness.

Description

technical field [0001] The invention relates to the field of air compressor piston rods, in particular to a composite coated piston rod and a manufacturing method thereof. Background technique [0002] At present, the manufacturing process of piston rod of reciprocating air compressor includes forging, normalizing, quenching and tempering, stress relief, high frequency quenching and low temperature tempering. The surface hardness of the piston rod made by this process is low, and the wear resistance is poor. To improve the surface hardness and wear resistance of the piston rod, if the transmission heat treatment method is used to increase the hardness value, surface quenching cracks will often occur and the product will be scrapped, or it will break during the user's application process, causing huge direct or indirect damage to the user. Economic losses. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a compos...

Claims

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Application Information

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IPC IPC(8): F16J7/00C23F17/00C23C8/00C23C14/34C23C14/06
Inventor 鄢强梁政吴涛吴俊李斌
Owner SICHUAN JINXING CLEAN ENERGY EQUIP CO LTD
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