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In-situ preparation of wear-resistant self-lubricating coating on surface of titanium alloy by laser cladding

A self-lubricating coating and laser cladding technology, applied in metal material coating technology, coating and other directions, can solve the problems of poor wear resistance and low hardness of titanium alloy, achieve improved wear performance, low friction coefficient, prevent The effect of oxidation

Inactive Publication Date: 2015-04-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the poor wear resistance caused by low hardness and high friction coefficient of titanium alloy. It provides a titanium alloy surface self-generated by laser cladding with strong bonding force, high hardness and low friction coefficient. Wear-resistant self-lubricating composite coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The TA15 titanium alloy sheet with a thickness of 10mm has a chemical composition of Ti-6.5Al-2Zr-1Mo-1V; the laser beam spot is circular, and TiC / Ti / TiC / Ti / is spontaneously formed on the surface of the titanium alloy by a preset powder laser cladding method. Ti 3 AlC 2 Multiphase wear-resistant self-lubricating composite material coating.

[0021] (1) Laser cladding equipment and cladding materials

[0022] The laser cladding equipment uses the LDF 10000-100 high-power fiber-coupled semiconductor laser produced by German Laserline Company. The cladding experiment uses Ti powder and Al powder with a powder size of 75-150μm, and TiC powder with a powder size of about 2.6μm. The purity is above 99.5%.

[0023] (2) Pre-processing

[0024] After the alloy powder is prepared, it is placed in a 100 ℃ oven to dry for 10 hours to remove moisture. The surface of the TA15 titanium alloy sheet to be cladding is sanded with sandpaper to remove the oxide film and oil stains, and cleaned...

Embodiment 2

[0030] The TA15 titanium alloy sheet with a thickness of 10mm has a chemical composition of Ti-6.5Al-2Zr-1Mo-1V; the laser beam spot is circular, and TiC / Ti / TiC / Ti / is spontaneously formed on the surface of the titanium alloy by a preset powder laser cladding method. Ti 3 AlC 2 Multiphase wear-resistant self-lubricating composite material coating.

[0031] (1) Laser cladding equipment and cladding materials

[0032] The laser cladding equipment uses the LDF 10000-100 high-power fiber-coupled semiconductor laser produced by German Laserline Company. The cladding experiment uses Ti powder and Al powder with a powder size of 75-150μm, and TiC powder with a powder size of about 2.6μm. The purity is above 99.5%.

[0033] (2) Pre-processing

[0034] After the alloy powder is prepared, it is placed in a 100 ℃ oven to dry for 10 hours to remove moisture. The surface of the TA15 titanium alloy sheet to be cladding is sanded with sandpaper to remove the oxide film and oil stains, and cleaned...

Embodiment 3

[0040] The TC4 titanium alloy sheet with a thickness of 10mm has a chemical composition of Ti-6Al-4V; the laser beam spot is circular, and TiC / Ti / Ti is self-generated in situ on the surface of the titanium alloy by a preset powder laser cladding method 3 AlC 2 Multiphase wear-resistant self-lubricating composite material coating.

[0041] (1) Laser cladding equipment and cladding materials

[0042] The laser cladding equipment uses the LDF 10000-100 high-power fiber-coupled semiconductor laser produced by German Laserline Company. The cladding experiment uses Ti powder and Al powder with a powder size of 75-150μm, and TiC powder with a powder size of about 2.6μm. The purity is above 99.5%.

[0043] (2) Pre-processing

[0044] After the alloy powder is prepared, it is placed in a 100 ℃ oven to dry for 10 hours to remove moisture. The surface of the TC4 titanium alloy plate to be cladding is sanded with sandpaper to remove the oxide film and oil stains, and cleaned with acetone. The al...

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Abstract

The invention discloses in-situ preparation of a wear-resistant self-lubricating composite material coating on the surface of a titanium alloy by laser cladding. The coating is formed by uniformly distributing a hard ceramic wear-resistant phase of titanium carbide and a metal ceramic self-lubricating phase of titanium aluminum carbide with low friction coefficient on a titanium substrate. Titanium carbide and titanium aluminum carbide in the coating are generated in situ, so that the compatibility of reinforcing particles and the substrate is good, the pollution problem caused by externally adding the reinforcing particles and the interface reaction problem of the reinforcing particles and the substrate are avoided, the interface bonding of a reinforcement and the substrate is good, and the reinforcing particles and the substrate are thermodynamically stable, and moreover, the metal ceramic of titanium aluminum carbide is lower than the conventional solid lubricant particles in friction coefficient and better than the conventional solid lubricant particles in self-lubricating property. The wear-resistant self-lubricating composite material coating is prepared in situ on the surface of the titanium alloy by adopting a laser cladding process, so that the operating process is simple, convenient and feasible, the energy consumption and the production cost can be lowered, and the wear-resistant self-lubricating coating is excellent in performance.

Description

Technical field [0001] The invention belongs to the technical field of surface treatment, relates to a titanium alloy laser cladding coating technology, and particularly relates to a wear-resistant self-lubricating composite material coating prepared in-situ on the surface of the titanium alloy. Background technique [0002] Titanium alloy has the outstanding characteristics of low density, high specific strength, high yield ratio, good thermal stability, excellent corrosion resistance and high temperature mechanical properties, and has good corrosion resistance and biocompatibility. It is widely used in aviation, Aerospace, chemical, marine, automotive and other fields. However, titanium alloys have inherent shortcomings such as low hardness, high temperature and high speed friction and flammability ("titanium fire"), poor wear resistance, high and unstable friction coefficient, and severe adhesive wear and fretting sensitivity, which limit The application of titanium alloy as ...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 陈德强黄正王华明
Owner BEIHANG UNIV
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