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CN-121992351-A - Composite coating containing micropore array and lubricating storage material and preparation method thereof

CN121992351ACN 121992351 ACN121992351 ACN 121992351ACN-121992351-A

Abstract

The invention discloses a composite coating containing a micropore array and lubricating storage materials and a preparation method thereof, and relates to the technical field of preparation of wear-resistant coatings. The preparation method of the composite coating containing the micropore array and the lubricating storage material comprises the following steps of S1, preparing a nitriding layer on the surface of a substrate, S2, preparing a first micropore array, S3, forming a first lubricating storage material layer, S4, forming a first wear-resistant layer, S5, preparing a second micropore array, S6, forming a second lubricating storage material layer, S7, repeating the steps of S4 to S6, preparing a multilayer composite wear-resistant coating containing the micropore array and the lubricating storage material, and S8, depositing a continuous lubricating coating on the surface of the multilayer composite wear-resistant coating containing the micropore array and the lubricating storage material obtained in the step S7. According to the composite coating containing the micropore array and the lubricating storage and the preparation method thereof, the nitriding layer and the multi-layer wear-resistant layer containing the lubricating storage are arranged, so that the wear resistance and the antifriction performance are remarkably improved.

Inventors

  • YU JINLI
  • GUAN YUNQI
  • SHI ZHENGLIANG
  • ZHENG HUIYUN
  • LI YELIN

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260508
Application Date
20260202

Claims (10)

  1. 1. The preparation method of the composite coating containing the micropore array and the lubricating storage material is characterized by comprising the following steps of: S1, preparing a nitriding layer on the surface of a substrate; S2, preparing a first micropore array on the surface of the nitriding layer; s3, depositing and filling the lubrication storage material in the first micropore array to form a first lubrication storage material layer; S4, depositing a wear-resistant material on the surface on which the first lubrication storage material layer is formed so as to form a first wear-resistant layer; S5, preparing a second micropore array on the surface of the first wear-resistant layer; s6, depositing and filling the lubrication storage material in the second micropore array to form a second lubrication storage material layer; S7, repeating the steps S4 to S6, and preparing a multi-layer composite wear-resistant coating containing a micropore array and lubricating storage materials; S8, depositing a continuous lubricating coating on the surface of the multilayer composite wear-resistant coating containing the micropore array and the lubricating storage material obtained in the step S7, wherein the lubricating coating covers the micropore array below the continuous lubricating coating.
  2. 2. The method for preparing a composite coating containing a micropore array and lubricating storage material according to claim 1, wherein in step S1, the substrate is a metal substrate selected from one of spheroidal graphite cast iron, gray cast iron, malleable cast iron, bearing steel, stainless steel, structural steel and tool steel.
  3. 3. The method for preparing the composite coating containing the micropore array and the lubricating storage material according to claim 1, wherein in the step S1, the nitriding layer is prepared by adopting any one of gas nitriding, ion nitriding or salt bath nitriding, the thickness of the nitriding layer is 50-80 μm, and the hardness HV 0.05 is 800-850.
  4. 4. The method for preparing the composite coating containing the micropore array and the lubricating storage material according to claim 1, wherein the preparation method for the first micropore array in the step S2 and the second micropore array in the step S5 comprises the steps of covering a mask plate with a preset hole pattern on a surface to be treated, and then carrying out treatment by adopting an ion beam etching method, wherein in the step S2, the micropore diameter of the first micropore array is 300-500 micrometers, the distance between adjacent holes is 1.0-1.5 mm, the micropore depth is 10-15 micrometers, and in the step S5, the micropore diameter of the second micropore array is 300-500 micrometers, the distance between adjacent holes is 1.0-1.5 mm, and the micropore depth is 1-2 micrometers.
  5. 5. The method for preparing a composite coating containing a micropore array and a lubricating stock according to claim 1, wherein in the step S3 and the step S6, the lubricating stock is at least one selected from MoS 2 、WS 2 and graphite, and the filling is deposited by a magnetron sputtering method.
  6. 6. The method for preparing the composite coating containing the micropore array and the lubricating storage material according to claim 1, wherein in the step S4, the wear-resistant material is selected from at least one of ZrO 2 and CrN, tiN, WC, the first wear-resistant layer is formed by deposition through a magnetron sputtering method, and the thickness of the first wear-resistant layer is 4-6 μm.
  7. 7. The method for preparing a composite coating containing a micropore array and a lubricating storage material according to claim 1, wherein in the step S7, the number of layers of the composite wear-resistant coating containing the micropore array and the lubricating storage material is 5-10.
  8. 8. The method of claim 1, wherein in step S8, the lubricating coating is formed by direct deposition without using a reticle by a magnetron sputtering method, wherein the lubricating coating has the same composition as the lubricating reservoir in step S3 and/or S6.
  9. 9. The method for preparing the composite coating containing the micropore array and the lubricating storage material, which is disclosed in claim 5 or 6, is characterized in that the magnetron sputtering method is one of direct current magnetron sputtering, radio frequency magnetron sputtering or magnetron co-sputtering, the power of the power supply during sputtering is 200-220W, the argon sputtering air pressure is 0.5-1.5 Pa, and the substrate temperature is 80-120 ℃.
  10. 10. A composite coating containing a micropore array and lubricating storage materials is characterized in that, a method of preparing a composite coating comprising an array of micropores and a lubricating stock according to any one of claims 1 to 8.

Description

Composite coating containing micropore array and lubricating storage material and preparation method thereof Technical Field The invention relates to the technical field of wear-resistant coating preparation, in particular to a composite coating containing a micropore array and lubricating storage materials and a preparation method thereof. Background In modern air conditioning systems, the compressor is used as a core power device, and the stability and life of the operation of the compressor directly affect the energy efficiency, noise level and overall performance of the whole machine. The friction pairs in the compressor, such as a piston and a cylinder sleeve, a crankshaft and a connecting rod bearing, a sliding vane and a rotor groove, etc., work for a long time under the conditions of high-speed rotation, high pressure difference and complex thermodynamic environment, bear frequent mechanical contact and friction action, are extremely easy to generate abrasion, fatigue fracture and even jamming phenomena, and further cause efficiency reduction, energy consumption increase, abnormal operation and even equipment damage. In order to improve the wear resistance and the lubricating property of the friction pair, the traditional method mostly adopts carburization/nitrogen and carbonitriding or coating wear-resistant coatings, and adds MoS 2, graphite, diamond-like carbon (DLC) and other lubricating coatings on the surface of the carburized layer/coating, and the coatings can reduce the friction coefficient to a certain extent and reduce the direct contact between metals, thereby delaying the wear process and prolonging the service life of the parts. However, as the air conditioner compressor is being miniaturized, increased in speed, and reduced in noise, the contact pressure and relative speed between the friction pairs are significantly increased, further exacerbating the wear problem. In practical application, the temperature resistance, fatigue resistance and self-lubricating performance of the existing lubricating coating are generally insufficient, and the existing lubricating coating is difficult to adapt to increasingly severe working conditions of compressors. Particularly, under the conditions of high temperature, high load or long-time continuous operation, the coating is easy to fall off or lose efficacy, so that the lubricating effect is suddenly reduced, and the abrasion between friction pairs is further increased. In order to maintain long-term reliable and stable operation between friction pairs, a micro-texture is arranged on a nitriding substrate, a Cr binding layer and a composite solid lubricating film are sequentially arranged on the micro-texture, the micro-texture stores molybdenum disulfide for grinding while friction and abrasion are reduced, and a gradient nano multilayer lubricating film reduces friction coefficient and abrasion rate. The invention discloses a cutting tool with a wear-resistant lubricating coating coated on the surface, which is prepared by alternately depositing TiAlN coating and MoS 2 coating on a tool substrate to obtain a TiAlN/MoS 2 multilayer composite coating, wherein the MoS 2 lubricating layer effectively reduces the friction coefficient of the TiAlN coating while maintaining the high hardness and heat resistance of the TiAlN coating, and the multilayer alternating composite coating prolongs the service life of the cutting tool. However, the binding force between the soft coating and the hard coating in the prepared composite coating is difficult to ensure, and the strength and the hardness of the MoS 2 soft coating are low, so that the overall shearing strength of the composite coating can be reduced. Chinese patent CN119615060A provides a self-lubricating wear-resistant multilayer composite coating and a preparation method thereof, wherein a nitride wear-resistant layer and a lubrication isolation layer are sequentially prepared on the surface of a DLC coating of a main functional layer, and the DLC main functional layer, the wear-resistant layer and the lubrication isolation layer are continuously prepared on the lubrication isolation layer, so that the self-lubricating wear-resistant multilayer composite coating is repeatedly and alternately formed, and the self-lubricating wear-resistant multilayer composite coating has high strength, toughness, high lubrication and high wear resistance. The arrangement of the lubricating isolation layer improves the lubricating property of the self-lubricating wear-resistant multilayer composite coating, but weakens the bonding strength of the whole coating. The Chinese patent CN114481099A discloses a preparation process of alternately depositing a soft and hard composite film by an electrojet method based on a mask plate, and provides a strip-shaped soft and hard composite film which is alternately deposited transversely. In summary, the existing soft and hard composite coating still has the problems of short serv