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Preparation method of wear-resistant self-lubricating coating for iron and steel materials

A self-lubricating coating, steel material technology, applied in the direction of metal material coating process, coating, device for coating liquid on the surface, etc. problems, to achieve the effect of increasing self-lubricating performance, improving fatigue resistance, and improving friction and wear life.

Active Publication Date: 2020-07-03
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

The application of wear-resistant film layers such as TiN and TiC has greatly improved the wear-resistant life of precision equipment and key moving parts of equipment, but its self-lubricating performance is relatively poor; while self-lubricating coatings such as molybdenum disulfide coating, Teflon Coatings, etc., although they have good self-lubricating properties, their wear-resistant life is relatively short; adding wear-resistant particles (silicon dioxide, silicon carbide, etc.) to some lubricating coatings can effectively improve the wear-resistant life of the coating However, in practical applications, there are problems such as easy powdering of the surface and poor adhesion
In summary, the current main wear-resistant and self-lubricating protection technology for the surface of steel materials can no longer fully meet the increasingly wide use requirements of products or equipment, and has become a bottleneck technology that restricts the further development of precision equipment and equipment.

Method used

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  • Preparation method of wear-resistant self-lubricating coating for iron and steel materials
  • Preparation method of wear-resistant self-lubricating coating for iron and steel materials
  • Preparation method of wear-resistant self-lubricating coating for iron and steel materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Preparation of wear-resistant self-lubricating coating for iron and steel materials. The sample material is 35 steel, the size is 100mm×50mm×5mm, the surface is milled to a roughness Ra≤1.6, and it is ready for use.

[0069] ① Soak the test piece in an organic solvent such as acetone or ethyl acetate for 2 minutes, then wipe it clean with absorbent cotton; then degrease it in an alkaline degreasing solution at 80±5°C for 30 minutes; then rinse it with tap water for 30s-60s.

[0070] ②Chemical roughening treatment: perform chemical roughening treatment according to the chemical roughening solution and process conditions shown in Table 1; the treatment time is 60 minutes, then rinse with tap water for 60 seconds, and dry.

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

[0072]

[0073] Remarks, the content of the concentrated sulfuric acid is 300g / L, specifically 300g of concentrated sulfuric acid per 1L of solution, and 90g / L of co...

Embodiment 2

[0081] Preparation of wear-resistant and self-lubricating coatings for steel materials. The sample material is 30CrMnSiA, the size is 100mm×50mm×5mm, and the surface is milled to a roughness of Ra≤1.6. It is ready for use.

[0082] ① Soak the test piece in an organic solvent such as acetone or ethyl acetate for 2 minutes, then wipe it clean with absorbent cotton; then degrease it in an alkaline degreasing solution at 80±5°C for 30 minutes; then rinse it with tap water for 30s-60s.

[0083] ②Chemical roughening treatment: perform chemical roughening treatment according to the chemical roughening solution and process conditions shown in Table 3; the treatment time is 120 minutes, then rinse with tap water for 60 seconds, and dry.

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

[0085]

[0086]

[0087] Remarks, the content of the concentrated sulfuric acid is 400g / L, specifically 400g of concentrated sulfuric acid per 1L of solution, an...

Embodiment 3

[0095] Preparation of wear-resistant and self-lubricating coatings for iron and steel materials. The sample material is 30SiMn2MoVA, the size is 100mm×50mm×5mm, and the surface is milled to a roughness of Ra≤1.6. It is ready for use.

[0096] ① Soak the test piece in an organic solvent such as acetone or ethyl acetate for 2 minutes, then wipe it clean with absorbent cotton; then degrease it in an alkaline degreasing solution at 80±5°C for 30 minutes; then rinse it with tap water for 30s-60s.

[0097] ②Chemical roughening treatment: perform chemical roughening treatment according to the chemical roughening solution and process conditions shown in Table 5; the treatment time is 120 minutes, then rinse with tap water for 60 seconds, and dry.

[0098] Table 5 Composition and process conditions of chemical roughening solution

[0099]

[0100] Remarks, the content of the concentrated sulfuric acid is 270g / L, specifically 270g of concentrated sulfuric acid per 1L of solution, and...

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Abstract

The invention concretely relates to a preparation method of a wear-resistant self-lubricating coating for a steel material. The method comprises the following steps of carrying out roughening treatment on a matrix firstly, 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 pretreatment on asample part, afterwards, preparing a hard particle-reinforced phase, and finally, preparing a self-lubricating coating B on the hard reinforced phase. A chemical roughening or mechanical roughening method is adopted for the roughening treatment, a roughening solution used for the chemical roughening treatment is prepared from 270-400 g / L concentrated sulfuric acid, 50-140 g / L concentrated nitricacid, 40-90 g / L ferric chloride, 1-20 g / L polyethylene glycol and 1-20 g / L glycerine, and the mechanical roughening method comprises sand blast roughening, ball blast roughening or ball throwing roughening. According to the method, the dry film friction coefficient of the coating can be lowered, the friction resistant wear life of the coating is prolonged, and the prepared coating has excellent corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of surface chemical treatment of metal materials using a 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 in particular relates to a preparation method of a wear-resistant self-lubricating coating for iron and steel materials. Background technique [0002] Wear is one of the most common failure forms of mechanical equipment parts. According to the statistics of some industrialized countries, the steel lost due to wear accounts for about 7% of the total output every year, causing economic losses of 10-15 billion yuan (" Preparation and Performance Research of Wear-resistant Self-lubricating Concorde Coating", Wang Wei, China University of Petroleum, 2006, p. 2, published on December 31, 2006). [0003] With the continuous development of science and technology, industrial production is inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/18C23C18/32C23C18/50C25D3/06C25D5/36C25F1/06B05D1/02B05D1/18B05D1/28
CPCB05D1/02B05D1/18B05D1/28C23C18/1806C23C18/1844C23C18/32C23C18/50C25D3/06C25D5/36C25F1/06
Inventor 钱建才邹洪庆吕基成许斌吴厚昌方敏
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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