Composite coating on aluminum workpiece surface and application thereof

A composite coating and workpiece surface technology, applied in the direction of surface reaction electrolytic coating, coating, metal material coating process, etc., can solve problems such as failure of lubricating layer, achieve small friction coefficient, reduce roughness, and strong binding force Effect

Pending Publication Date: 2019-01-08
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In order to solve the problem that the lubricating layer in the prior art will fail under high temperature and heavy load conditions, the present invention proposes a new composite coating on the surface of aluminum workpieces and its application. By setting the composite coating on the surface of aluminum workpieces coating, which reduces the friction coefficient of the scroll disc in the scroll compressor at the initial stage of running-in, and improves the stability of the single lubricating layer in the composite coating under high pressure and heavy load conditions

Method used

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  • Composite coating on aluminum workpiece surface and application thereof
  • Composite coating on aluminum workpiece surface and application thereof

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Embodiment 1

[0031] Such as figure 1 As shown, on the entire surface of the movable scroll 10 and the fixed scroll 20, Al 2 o 3 Ceramic-based hard wear-resistant layer (11a, 21a), the Al 2 o 3 The ceramic-based hard wear-resistant layer (11a, 21a) can be obtained by a hard anodic oxidation process or a micro-arc oxidation process. In this embodiment, hard anodizing is used to treat the surfaces of the movable scroll 10 and the fixed scroll 20 . The hard anodizing process complies with "GB / T 19822-2005 Specification for Hard Anodic Oxidation Films on Aluminum and Aluminum Alloys". The thickness of the hard anodized film layer measured by a thickness gauge is 35 μm. According to the test method described in "GB / T 4340.1 Metal Material Vickers Hardness Test Part 1: Test Method", a plurality of test points on the hard anodized layer are subjected to a Vickers microhardness test, and the measured The Vickers microhardness of the hard anodized layer is between 300HV-500HV, which is greatly...

Embodiment 2

[0037] There are also parts such as Oldham slip rings, upper brackets, pistons, cylinders, rollers or flanges in scroll compressors, and the composite coating of the present invention can also be arranged on the above parts. Hard anodizing or micro-arc oxidation can be used to set Al on the surface of the component 2 o 3 Ceramic-based hard wear-resistant layer. In this embodiment, micro-arc oxidation is carried out on the surface of the above-mentioned parts. The thickness of the micro-arc oxidation layer is 5-30 μm. In this embodiment, the thickness of the oxide layer on the surface of the above-mentioned parts is 15 μm. Between 700HV-1500HV, the hardness of the aluminum alloy base material is greatly improved, and the surface roughness of the micro-arc oxidation layer is Ra≤0.8μm, thereby improving the wear resistance of the air compressor scroll.

[0038] A tungsten disulfide layer is arranged on the micro-arc oxidation layer, and the coating method of the tungsten disulf...

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Abstract

The invention relates to the technical field of the composite coating, and specifically relates to a composite coating on an aluminum workpiece surface and an application thereof. An Al2O3-based ceramic hard wearing layer is arranged on the surface of the aluminum workpiece, and a tungsten disulfide layer is arranged thereon. By arranging the composite coating disclosed by the invention, the aluminum oxide-based ceramic hard wearing layer of the compositing coating is high in hardness and small in roughness, the wear resistance of the workpiece is improved; a tungsten disulfide monomer lubricating layer fills microproes of the aluminum oxide-based ceramic hard wearing layer, reduces the roughness of the aluminum oxide-based ceramic hard wearing layer and a friction coefficient is small; the film layer of the composite coating is good in uniformity, strong in binding force, and solves the problem that the monomer lubricating layer in the composite coating under a high-pressure heavy-load working condition is prone to failure; the tungsten disulfide monomer lubricating layer is thin in film layer, the leakage amount caused by the monomer lubricating layer wearing of the composite coating in the work process of a movable scroll plate and a stationary scroll plate of a scroll compressor is reduced, the cooling capacity is greatly improved, and the compression performance of the compressor is improved.

Description

technical field [0001] The invention relates to the technical field of composite coatings, in particular to a composite coating on the surface of an aluminum workpiece and its application. Background technique [0002] The scroll compressor is a compressor with variable compression volume composed of a fixed involute fixed scroll and an eccentric orbiting and translational involute moving scroll. The moving scroll and the fixed scroll are used as the scroll The most important friction pair in the compressor, the material, structure, surface coating and meshing precision of the two directly determine the sealing of the compression chamber, and the compression volume of the gas is most affected, which in turn affects the performance and reliability of the whole machine. [0003] At present, the vast majority of scroll compressors are applied to vehicle air-conditioning systems and air compressor systems. The working conditions and operating environments of vehicle air-conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/35C23C14/58C23C26/00C23C28/04C25D11/04
CPCC23C14/0623C23C14/35C23C14/5806C23C26/00C23C28/04C25D11/026C25D11/04
Inventor 魏会军李业林史正良郭小青陈晓晓
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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