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Material for preparing wear-resistant self-lubricating coating, wear-resistant self-lubricating coating and preparation method

A self-lubricating coating and cold spraying technology, which is applied in coating, metal material coating process, heating inorganic powder coating, etc., can solve the problems of high wear resistance and inability to realize coating self-lubrication at the same time

Active Publication Date: 2021-12-07
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a material for preparing wear-resistant self-lubricating coatings, wear-resistant self-lubricating coatings and preparation methods, so as to solve the problem that the self-lubricating and high wear-resistant coatings cannot be simultaneously realized in the prior art The problem

Method used

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  • Material for preparing wear-resistant self-lubricating coating, wear-resistant self-lubricating coating and preparation method
  • Material for preparing wear-resistant self-lubricating coating, wear-resistant self-lubricating coating and preparation method
  • Material for preparing wear-resistant self-lubricating coating, wear-resistant self-lubricating coating and preparation method

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preparation example Construction

[0038] The preparation method of wear-resistant self-lubricating coating of the present invention comprises the following steps:

[0039] Step 1, mixing polished alumina powder and aluminum alloy powder, and then placing the obtained mixed raw materials in a mixer for mixing for 6-8 hours, ensuring that they are fully mixed and then taking out the obtained mixed powder;

[0040] Step 2, drying the mixed powder obtained in step 1 in a vacuum oven at 60-100°C, keeping it warm for 5-8 hours, and taking it out;

[0041] Step 3: Spray the dried mixed powder onto the surface of the light alloy material that has been sandblasted by cold spraying technology to form a wear-resistant self-lubricating coating with a thickness of 500 μm-3000 μm.

[0042] In step 1, the mass of the polished alumina powder is 20%-40% of the total mass of the polished alumina powder and the aluminum alloy powder. Polished alumina powder is formed by agglomeration of fine lamellar alumina, the particle size ...

Embodiment 1

[0051] The preparation method of the wear-resistant self-lubricating coating of the present embodiment comprises the following steps:

[0052] 1. Weigh 40g of polished alumina powder and 160g of 6061 aluminum alloy powder respectively, wherein the particle size of 6061 aluminum alloy powder is 5-30μm, and the average particle size is 20μm.

[0053] 2. Mix the polished alumina powder and 6061 aluminum alloy powder weighed in step 1 evenly, then put them in a mixer for mixing, and take them out after 6 hours of mixing;

[0054] 3. Dry the mixed powder obtained from the mixing in step 2 in a vacuum oven at 80° C., keep it warm for 6 hours, and then take it out.

[0055] 4. Use cold spray technology to spray the dried mixed powder in step 3 onto the surface of 7075 aluminum alloy that has been sandblasted to form a wear-resistant and self-lubricating coating with a thickness of 2000 μm; wherein, when cold spraying, the carrier gas used is nitrogen, The carrier gas pressure is 0.8...

Embodiment 2

[0059] The preparation method of the wear-resistant self-lubricating coating of the present embodiment comprises the following steps:

[0060] 1. Weigh 60g of polished alumina powder and 140g of 6061 aluminum alloy powder respectively, wherein the particle size of 6061 aluminum alloy powder is 5-30μm, and the average particle size is 20μm.

[0061] 2. Mix the polished alumina powder and 6061 aluminum alloy powder weighed in step 1 evenly, then put them in a mixer for mixing, and take them out after 6 hours of mixing;

[0062] 3. Dry the mixed powder obtained from the mixing in step 2 in a vacuum oven at 80° C., keep it warm for 6 hours, and then take it out.

[0063] 4. Use cold spray technology to spray the dried mixed powder in step 3 onto the surface of 7075 aluminum alloy that has been sandblasted to form a wear-resistant and self-lubricating coating with a thickness of 2000 μm; wherein, when cold spraying, the carrier gas used is nitrogen, The carrier gas pressure is 0.8...

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Abstract

The invention discloses a material for preparing a wear-resistant self-lubricating coating, a wear-resistant self-lubricating coating and a preparation method. The material components are polished alumina powder and aluminum alloy powder, and the mass percentage of the polished alumina powder is 20% to 40% of the total mass of the polished alumina powder and the aluminum alloy powder. The material for preparing the wear-resistant self-lubricating coating is cold-sprayed onto the surface of the light alloy material to form the wear-resistant self-lubricating coating. The invention solves the problem that the self-lubrication and high wear resistance of the coating cannot be simultaneously realized in the prior art. The invention can improve the wear resistance of the coating while reducing the friction coefficient of the coating.

Description

technical field [0001] The invention belongs to the field of metal coating preparation, and in particular relates to a material for preparing a wear-resistant self-lubricating coating, a wear-resistant self-lubricating coating and a preparation method. Background technique [0002] Light alloys are widely used in the fields of aerospace and automobile manufacturing because of their advantages of high specific strength, high specific stiffness and small specific gravity. For example, the cylinder block of some automobile engines has been changed from gray cast iron to aluminum alloy, but some additional requirements must be met, such as: to ensure that the sliding surface of the cylinder barrel is wear-resistant and the friction pair is easy to slide. Researchers have so far developed many techniques for improving the wear resistance of light alloy surfaces. [0003] At present, the technologies for preparing wear-resistant coatings on the surface of light alloy alloys mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
CPCC23C24/085
Inventor 牛文娟王强李旭毛轩李洋洋杨驹王永刚王璐
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY