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Three-phase aluminum-titanium-copper micro-particle reinforced aluminum alloy protective coating and preparation method thereof

A technology of protective coating and copper particles, used in metal processing equipment, manufacturing tools, grinding/polishing equipment, etc., can solve the problems of low surface hardness and poor wear resistance of aviation aluminum alloy components, and achieve improved performance and improved performance. Hardness and wear resistance, uniform distribution effect

Active Publication Date: 2017-03-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to invent a method for preparing a three-phase aluminum-titanium-copper particle-reinforced aluminum alloy protective coating against defects such as low surface hardness and poor wear resistance of aviation aluminum alloy components.

Method used

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  • Three-phase aluminum-titanium-copper micro-particle reinforced aluminum alloy protective coating and preparation method thereof
  • Three-phase aluminum-titanium-copper micro-particle reinforced aluminum alloy protective coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of three-phase aluminum-titanium-copper particle-reinforced aluminum alloy protective coating, such as figure 1 As shown, the key is to pretreat the surface of 7050 aluminum alloy first, then prepare micro-nano composite powder, and finally obtain high hardness and high Protective coating with properties such as strength and excellent abrasion resistance. Specific steps are as follows:

[0034] 1. Pretreatment of the aluminum alloy surface: firstly use W28 metallographic sandpaper to polish it, and then use W20, W14, W10 sandpaper to polish it in sequence. treatment to maintain a certain roughness on the surface of the aluminum alloy, above Ra6.3 microns, which is conducive to enhancing the bonding force of the coating. Finally, clean the polished aluminum alloy with acetone, and then ultrasonically clean it in absolute ethanol for at least 10 minutes. , dry with cold air, set aside;

[0035] 2. Preparation of micro-composite powder: Fir...

Embodiment 2

[0041]A preparation method of a three-phase aluminum-titanium-copper particle-reinforced aluminum alloy protective coating, the key of which is to pretreat the surface of the aluminum alloy substrate with the grade of 7050, then prepare micro-nano composite powder, and finally pass laser cladding , grinding and quenching, cryogenic treatment and twice low temperature tempering to obtain a protective coating with high hardness, high strength and excellent wear resistance. Specific steps are as follows:

[0042] 1. Pretreatment of the aluminum alloy surface: firstly use W28 metallographic sandpaper to polish it, and then use W20, W14, W10 sandpaper to polish it in sequence. Treatment to maintain a certain roughness on the surface of the aluminum alloy, which is conducive to enhancing the bonding force of the coating. Finally, clean the polished aluminum alloy with acetone, then ultrasonically clean it in absolute ethanol for 5 minutes, dry it with cold air, and set aside;

[00...

Embodiment 3

[0049] A preparation method of a three-phase aluminum-titanium-copper particle-reinforced titanium alloy protective coating, the key of which is to pretreat the surface of the aluminum alloy (the grade can be 7050), then prepare micro-nano composite powder, and finally pass laser cladding , grinding and quenching, cryogenic treatment and twice low temperature tempering to obtain a protective coating with high hardness, high strength and excellent wear resistance. Specific steps are as follows:

[0050] 1. Pretreatment of the aluminum alloy surface: firstly use W28 metallographic sandpaper to polish it, and then use W20, W14, W10 sandpaper to polish it in sequence. Treatment to maintain a certain roughness on the surface of the aluminum alloy, which is conducive to enhancing the bonding force of the coating. Finally, clean the polished aluminum alloy with acetone, then ultrasonically clean it in absolute ethanol for 8 minutes, dry it with cold air, and set aside;

[0051] 2. P...

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Abstract

The invention discloses a three-phase Al-Ti-Cu microparticle enhanced Al alloy protective coating and a preparation method. The preparation method is characterized in that three-phase microparticle enhanced metal-based composite powder is prepared from micro-Al powder, micro-Ti powder and micro-Cu powder in certain proportion and is arranged on the surface of an Al alloy in a laser cladding manner, an Al alloy coating after cladding is subjected to grind-hardening, the Al alloy and the coating of the Al alloy after grind-hardening are placed in liquid nitrogen for cryogenic treatment, and finally, the Al alloy coating after cryogenic treatment is subjected to two times of low-temperature tempering. The Al alloy protective coating has excellent performance including high hardness, high strength, wear resistance, corrosion resistance and the like.

Description

technical field [0001] The present invention relates to an aluminum alloy coating and its preparation method, in particular to an aluminum alloy protective layer that generates intermetallic compounds and its preparation method, in particular to a three-phase metal particle reinforced aluminum alloy protective coating and its preparation method . Background technique [0002] As we all know, the working conditions of aerospace components represented by aluminum alloys are becoming increasingly harsh, and improving the surface hardness and wear resistance of aluminum alloy components has become an urgent problem to be solved. The use of laser cladding technology to prepare high-performance protective coatings on the surface of substrates has become an effective means to solve this problem. [0003] Intermetallic compounds have the advantages of low density, high hardness, high elastic modulus, good wear resistance, high oxidation resistance, etc., and have become the most pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C23C24/10C22C14/00B22F1/00C22F1/04B24B19/00
Inventor 陈竹黎向锋左敦稳王宏宇李建忠陈冠宇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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