Preparation method of aluminum and aluminum alloy wear-resistant self-lubricating coating

A technology of self-lubricating coatings and aluminum alloys, applied in coatings, electrolytic coatings, etc., can solve problems such as insufficient self-lubricating properties of coatings, easy pulverization, and poor adhesion, so as to avoid secondary damage and improve adhesion Good, the effect of improving the service life

Active Publication Date: 2020-04-24
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method for preparing aluminum and aluminum alloy wear-resistant self-lubricating coatings, the coatings prepared by the method have both self-lubricating and wear-resistant properties, which solves the problems of coatings in the prior art. Insufficient self-lubrication, easy pulverization and poor adhesion during use, effectively reducing the friction coefficient of the coating and improving its service life

Method used

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  • Preparation method of aluminum and aluminum alloy wear-resistant self-lubricating coating
  • Preparation method of aluminum and aluminum alloy wear-resistant self-lubricating coating
  • Preparation method of aluminum and aluminum alloy wear-resistant self-lubricating coating

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Preparation of wear-resistant and self-lubricating coatings on aluminum and aluminum alloys. The base material of the test piece is 7A04-T6 aluminum alloy, the specification is φ90mm×5mm, and the surface is processed to a roughness of Ra≤1.6.

[0069] ① Soak the specimen in acetone for 2 minutes, then wipe it clean with absorbent cotton; then degrease it in an alkaline degreasing solution at 60-75°C for 5-10 minutes; then rinse it with tap water for 30s-60s.

[0070] ②Chemical roughening treatment: Carry out chemical roughening treatment according to the roughening solution and process conditions described in Table 1; time 15min, then rinse with tap water for 30s-60s, until the appearance of the substrate surface is uniform, without roughening such as shiny or blooming unpleasant sight.

[0071] Table 1 Composition and process conditions of chemical roughening solution

[0072]

[0073] ③Preparation of self-lubricating coating A: The self-lubricating coating is prep...

Embodiment 2

[0081] Preparation of wear-resistant and self-lubricating coatings on aluminum and aluminum alloys. The base material of the test piece is 6063-T6 aluminum alloy, the specification is φ90mm×5mm, and the surface is processed to a roughness of Ra≤1.6.

[0082] ① Soak the specimen in acetone for 2 minutes, then wipe it clean with absorbent cotton; then degrease it in an alkaline degreasing solution at 60-75°C for 5-10 minutes; then rinse it with tap water for 30s-60s.

[0083] ②Chemical roughening treatment: Carry out chemical roughening treatment according to the roughening solution and process conditions described in Table 3; time 15min, then rinse with tap water for 30s-60s, until the appearance of the substrate surface is uniform, without roughening such as shiny or blooming unpleasant sight.

[0084] Table 3 Composition and process conditions of chemical roughening solution

[0085]

[0086] ③Preparation of self-lubricating coating A: The self-lubricating coating was pre...

Embodiment 3

[0093] Preparation of wear-resistant and self-lubricating coatings on aluminum and aluminum alloys. The base material of the test piece is 7A04-T6 aluminum alloy, the specification is φ90mm×5mm, and the surface is processed to a roughness of Ra≤1.6.

[0094]① Soak the specimen in acetone for 2 minutes, then wipe it clean with absorbent cotton; then degrease it in an alkaline degreasing solution at 60-75°C for 5-10 minutes; then rinse it with tap water for 30s-60s.

[0095] ②Mechanical roughening treatment: the selected abrasive is 100 mesh 50% corundum + 50% glass sand, and the sample is sandblasted. After sandblasting until the surface of the sample is uniform, use organic solvents such as acetone or ethyl acetate. The sample surface was cleaned and dried.

[0096] ③Preparation of self-lubricating coating A: The self-lubricating coating was prepared on the surface of the substrate by air spraying method, wherein the coating was CP02 self-lubricating coating, and the solid com...

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Abstract

The invention particularly relates to a method for preparing a wear-resistant self-lubricating coating of aluminum and aluminum alloy. The method comprises the steps of firstly, carrying out roughening treatment on a matrix, then, preparing a self-lubricating coating A on the surface of the matrix, carrying out polishing treatment on the self-lubricating coating A, then, carrying out pretreatmenton a test piece, then, preparing a hard particle reinforcing phase by adopting an electrochemical in-situ growth method, and finally, preparing a self-lubricating coating B on the hard particle reinforcing phase, wherein the roughening treatment adopts a chemical roughening or mechanical roughening method, a roughening solution for chemical roughening treatment contains 80-200g / L of ammonium bifluoride, 10-90g / L of ammonium chloride, 0.01-5g / L of copper chloride, 1-20g / L of polyethylene glycol, 0.5-20g / L of sodium gluconate, 1-20g / L of boric acid and 1-20g / L of glycerol, and the mechanical roughening method comprises sandblasting roughening, shot jetting roughening, shot blasting roughening or 3D printing roughening. According to the method, the coefficient of friction of the wear-resistant self-lubricating coating is effectively lowered, and the service life of the wear-resistant self-lubricating coating is prolonged.

Description

technical field [0001] The invention belongs to the technical field of surface chemical treatment of metal materials using the reaction solution of an acidic aqueous solution with pH<6 to react with the surface, and the reaction product of the surface material remains in the covering layer, and specifically relates to the preparation of a wear-resistant self-lubricating coating for aluminum and aluminum alloys method. Background technique [0002] With the continuous improvement of energy saving and weight reduction requirements, aluminum and aluminum alloy materials are widely used in aviation, aerospace, automobiles, high-speed rail due to their advantages such as low density, high specific strength, good mechanical properties, electrical conductivity, processing performance and corrosion resistance. , ships, construction, food, chemical industry, machinery manufacturing, electronic communication and other fields ("Standard application status and method research progres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D5/44C25D5/48C23F1/20
CPCC23F1/20C25D5/44C25D5/48C25D15/00
Inventor 钱建才邹洪庆许斌吕基成吴厚昌方敏
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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