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A kind of surface treatment method of aluminum alloy material for automobile air-conditioning parts

A technology for aluminum alloy materials and automotive air conditioners, which is applied in metal material coating technology, electrolytic coatings, liquid chemical plating, etc. The effect of increasing the hardness of the coating and reducing the coefficient of friction

Active Publication Date: 2021-05-11
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the rough polishing process with strong grinding effect can quickly achieve the effect of removing burrs and uneven structures on the surface of the coating, so that the flatness of the coating surface is greatly improved, but the effect of rough polishing on the roughness of the coating is not obvious. Rough polishing has a greater grinding effect, which will cause damage to the coating (peeling and peeling of the coating) and make the part invalid
The fine polishing process with weak grinding effect can greatly improve the surface finish of the coating and reduce the roughness, but it is difficult to remove the burrs and surface unevenness of the coating by fine polishing, and the flatness of the coating surface is insufficient.

Method used

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  • A kind of surface treatment method of aluminum alloy material for automobile air-conditioning parts
  • A kind of surface treatment method of aluminum alloy material for automobile air-conditioning parts
  • A kind of surface treatment method of aluminum alloy material for automobile air-conditioning parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First carry out stress relief heat treatment to AlCuMgSiFe aluminum alloy parts, heat treatment temperature 160 ℃, holding time 10h; The parts after stress relief treatment are subjected to electroless Ni-Co-P / graphite coating (wherein the volume percentage content of graphite is 2-20%) ; The volume percentage content of Ni-Co-P is 80-98%), and the thickness of the coating is 10 μm; vacuum heat treatment is carried out to the coating parts (the purpose of heat treatment is to remove the residual stress and residual moisture of the coating, and improve the hardness of the coating; the vacuum environment avoids the oxidation and discoloration of the coating ), the vacuum degree is 1×10Pa, the heating temperature is 180°C, and the holding time is 5h; the surface of the coating layer after heat treatment is polished three times, firstly, rough polishing treatment is performed, the equipment is a three-dimensional vibration polishing machine, and the abrasive is 4×4mm Oblique...

Embodiment 2

[0043] First, carry out stress relief heat treatment on AlCuMgSiNi alloy parts, heat treatment temperature is 180 ℃, and holding time is 8h; the parts after stress relief treatment are electroplated with Ni-Mo-P / SiC coating (the volume percentage of SiC is 2-20%, Ni- The volume percentage of Mo-P is 80-98%), and the thickness of the coating is 15 μm; vacuum heat treatment is carried out on the coated parts (the purpose of heat treatment is to remove the residual stress and residual moisture of the coating, and improve the hardness of the coating; the vacuum environment avoids oxidation and discoloration of the coating), vacuum The temperature is 2×10Pa, the heating temperature is 250°C, and the holding time is 3h; the surface of the coating after heat treatment is polished three times, firstly, rough polishing is performed, the equipment is a planetary polishing machine, and the abrasive is 10×10mm oblique triangular white corundum , cleaning agent mass percentage concentration...

Embodiment 3

[0048] Firstly, stress relief heat treatment is carried out on AlCuMgSiAg alloy parts, the heat treatment temperature is 210 ℃, and the holding time is 5h; the parts after stress relief treatment are electroless Ni-P / Si 3 N 4 Coating (Si 3 N 4 The volume percentage content of Ni-P is 2-20%, the volume percentage content of Ni-P is 80-98%), and the thickness of the coating is 12 μm; vacuum heat treatment is carried out on the coating parts (the purpose of heat treatment is to remove the residual stress and residual moisture of the coating, and improve the hardness of the coating ; Vacuum environment to avoid oxidation and discoloration of the coating), vacuum degree 1.5×10Pa, heating temperature 190°C, holding time 6h; 3 passes of polishing on the surface of the coating after heat treatment, first rough polishing treatment, the equipment is three-dimensional vibration polishing machine, the abrasive is 6×6mm oblique triangular brown corundum, the mass percentage concentration...

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Abstract

The invention relates to a surface treatment method of an aluminum alloy material used for automobile air-conditioning parts, and belongs to the technical field of automobile material preparation. The method comprises: (1) performing stress-relief heat treatment on the aluminum alloy part; (2) coating a composite coating on the aluminum alloy part after the stress-relief treatment; (3) performing vacuum heat treatment on the aluminum alloy part with the composite coating; ( 4) putting the parts after the vacuum heat treatment into the polishing equipment for rough grinding and polishing; (5) carrying out the intermediate grinding and polishing of the parts after the rough grinding; (6) carrying out the fine grinding and polishing of the parts after the intermediate grinding; ( 7) The polished parts are ultrasonically cleaned and dried. Compared with the original coating, the friction coefficient and roughness of the coating treated by the method of the present invention "vacuum heat treatment + 3-pass polishing" are greatly reduced, and the hardness is greatly improved. The durability test assessment of the actual vehicle system shows that the service life of the coating parts is improved. More than 10 times.

Description

technical field [0001] The invention relates to a surface treatment method of an aluminum alloy material used for automobile air-conditioning parts, and belongs to the technical field of automobile material preparation. Background technique [0002] In recent years, with the rapid development of the automobile industry, higher requirements have been put forward for the materials used in automobile parts. For example, the materials used are required to have low density to meet the lightweight requirements of automobiles; at the same time, the materials are also required to have high strength, high wear resistance and other mechanical and physical properties to improve the service life of parts, extend the scrap cycle, and reduce waste pollution. Taking the automobile air-conditioning system as an example, its core component is the air-conditioning compressor. For example, the core components such as the cylinder liner, front and rear end plates, rotors and blades of the rotar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04C22F1/02C25D15/00C23C18/32C23C18/50C25D5/50C25D5/52
CPCC22F1/02C22F1/04C23C18/1662C23C18/1689C23C18/1692C23C18/32C23C18/50C25D5/50C25D5/52C25D15/00
Inventor 聂俊辉樊建中赵月红魏少华刘彦强左涛马自力郝心想
Owner 有研金属复材技术有限公司