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A kind of laser cladding coating powder and preparation method

A technology of laser cladding and coating powder, which is applied in the direction of coating, metal material coating process, etc., can solve the problems of small powder mass, easy volatilization and splashing, difficult laser cladding of single aluminum, etc., to achieve fine grain Particles, reduced volatilization and splashing, and good macroscopic appearance

Active Publication Date: 2020-07-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, many coating preparation methods are prepared by simple powder, and in the laser cladding experiment, the experimental temperature is relatively high. For example, Al powder is a typical light metal. Due to its relatively low melting point, boiling point and density, the powder quality Relatively small, very easy to volatilize and spatter in this case, elemental aluminum is difficult to laser cladding

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  • A kind of laser cladding coating powder and preparation method
  • A kind of laser cladding coating powder and preparation method
  • A kind of laser cladding coating powder and preparation method

Examples

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Embodiment 1

[0031] A laser cladding coating powder, its composition and mole fraction are: TiAl powder: 99%, B powder: 1%, the average particle size of TiAl powder is 100 mesh, the average particle size of B powder is 200 mesh, Ti and The atomic ratio of Al is 1:1.

[0032] A method for preparing a laser cladding coating, comprising the following steps:

[0033] (1) Pretreatment of the substrate: polish and clean the metal substrate, and the specific steps of polishing and cleaning: polish the surface of the metal substrate with 200-grit sandpaper and then polish it with 400-grit sandpaper until there are no rough scratches on the surface Make the wear marks in the same direction and make the surface bright, and then wash with alcohol and acetone to remove the oxide film and oil stains on the surface of the metal substrate, and dry it for later use. The metal substrate is TC4 titanium alloy, and its chemical composition is shown in Table 1;

[0034] (2) Weigh the laser cladding coating p...

Embodiment 2

[0041] A laser cladding coating powder, its composition and mole fraction are: TiAl powder: 90%, B powder: 10%, the average particle size of TiAl powder is 120 mesh, the average particle size of B powder is 220 mesh, Ti and The atomic ratio of Al is 1:1.

[0042] A method for preparing a laser cladding coating, comprising the following steps:

[0043] (1) Pretreatment of the substrate: polish and clean the metal substrate, and the specific steps of polishing and cleaning: polish the surface of the metal substrate with 200-grit sandpaper and then polish it with 400-grit sandpaper until there are no rough scratches on the surface Make the grinding marks consistent direction, bright surface, then clean with alcohol and acetone, remove the oxide film and oil stain on the surface of the metal substrate, dry for subsequent use, the metal substrate is TC4 titanium alloy, its chemical composition is the same as in Example 1;

[0044] (2) Weigh the laser cladding coating powder in pro...

Embodiment 3

[0049] A laser cladding coating powder, its composition and mole fraction are: TiAl powder: 96%, B powder: 4%, the average particle size of TiAl powder is 150 mesh, the average particle size of B powder is 250 mesh, Ti and The atomic ratio of Al is 1:1.

[0050] A method for preparing a laser cladding coating, comprising the following steps:

[0051] (1) Pretreatment of the substrate: polish and clean the metal substrate, and the specific steps of polishing and cleaning: polish the surface of the metal substrate with 200-grit sandpaper and then polish it with 400-grit sandpaper until there are no rough scratches on the surface Make the grinding marks consistent direction, bright surface, then clean with alcohol and acetone, remove the oxide film and oil stain on the surface of the metal substrate, dry for subsequent use, the metal substrate is TC4 titanium alloy, its chemical composition is the same as in Example 1;

[0052] (2) Weigh the laser cladding coating powder in prop...

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Abstract

The invention discloses laser cladding coating powder and a preparation method thereof. The laser cladding coating powder is prepared from the components by mole: 90%-99% of TiAl powder and 1%-10% ofB powder; and the preparation method comprises the steps of metal matrix selection and pretreatment, powder matching and ball milling, powder presetting, and laser cladding. TiAl and B make an in-situreaction through the effect of a CO2 laser beam, and a TiAl based alloy coating with TiB and TiB2 as reinforcing phases is prepared on the surface of a metal matrix. According to the laser cladding coating powder and the preparation method thereof, the hardness of the laser cladding coating is high, good wear resistance and corrosion resistance are achieved, and the laser cladding coating is bonded to the matrix in a metallurgical mode and the bonding condition is good.

Description

technical field [0001] The invention relates to a laser cladding coating powder and a preparation method thereof, belonging to the technical field of surface modification of laser cladding metal materials. Background technique [0002] Aluminum alloy has low density, high specific strength, low coefficient of thermal expansion, and is easy to process. It has good electrical and thermal conductivity, plasticity, weldability and mechanical properties. As a lightweight structural material, aluminum alloys are widely used in industrial fields such as aviation, aerospace, automobiles, and ships. However, its inherent characteristics of friction and wear and poor high-temperature oxidation resistance limit its further use in complex environments or harsh working conditions. Similarly, titanium alloys are widely used in various fields such as aerospace, petrochemical, automobile and shipbuilding, and military chemical industry due to their high specific strength, high specific sti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 刘洪喜赵艳爽张晓伟张璐璐
Owner KUNMING UNIV OF SCI & TECH
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