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Preparing method for surface oxide-based coating of titanium alloy and titanium-aluminum intermetallic compound

An intermetallic compound and surface oxide technology, applied in metal material coating process, coating, melting spray plating, etc., can solve the problems of complex process, increased cost, poor thermal shock resistance of coating, and simplify the production process. , The effect of reducing production cost and improving thermal shock resistance

Active Publication Date: 2016-11-23
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a preparation method for oxide-based coatings on the surface of titanium alloys and titanium-aluminum intermetallic compounds. This common and inherent step of spraying a layer of alloy bottom layer, that is, the bonding layer, overcomes the complex process of preparing ceramic matrix inorganic composite coatings, the obvious increase in cost and the thermal shock resistance of the coating in the prior art by spraying a layer of alloy bottom layer poor sex defect

Method used

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  • Preparing method for surface oxide-based coating of titanium alloy and titanium-aluminum intermetallic compound
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  • Preparing method for surface oxide-based coating of titanium alloy and titanium-aluminum intermetallic compound

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The first step is to prepare aluminum / metal oxide composite powder for thermal spraying, that is, spraying feed:

[0038] 31% aluminum powder with a particle size range of 0.5 micron to 10 micron and TiO with a particle size range of 0.001 micron to 10 micron 2 Powder 69% is uniformly mixed into material powder, and then uniformly mixed into the weight ratio is material powder: polyvinyl alcohol binder of binder = 100: 0.8, is thus mixed with aluminum / metal oxide composite powder for thermal spraying , the above percentages are percentages by weight;

[0039] The second step is to sandblast the surface of the workpiece:

[0040] Sand blast the surface of the TC4 titanium alloy workpiece to be coated;

[0041] The third step, preparation of oxide-based coating:

[0042] Using the method of atmospheric plasma spraying, the aluminum / metal oxide composite powder prepared in the first step is sprayed on the surface of the TC4 titanium alloy workpiece obtained in the secon...

Embodiment 2

[0053] The first step is to prepare aluminum / metal oxide composite powder for thermal spraying, that is, spraying feed:

[0054] 10% aluminum powder with a particle size range of 0.5 micron to 10 micron and Cr with a particle size range of 0.001 micron to 10 micron 2 o 3 Powder 90% is evenly mixed into material powder, and then uniformly mixed into the weight ratio of material powder: binder = 100:0.1 binder methyl cellulose, thus being prepared as aluminum / metal oxide composite for thermal spraying powder, the above percentages are percentages by weight;

[0055] The second step is to sandblast the surface of the workpiece:

[0056] Sand blast the surface of the Ti-50Al titanium-aluminum intermetallic compound workpiece to be coated;

[0057] The third step, preparation of oxide-based coating:

[0058] Using the method of vacuum plasma spraying, the aluminum / metal oxide composite powder prepared in the first step is sprayed on the surface of the Ti-50Al titanium-aluminum ...

Embodiment 3

[0060] The first step is to prepare aluminum / metal oxide composite powder for thermal spraying, that is, spraying feed:

[0061] 50% of the aluminum powder with a particle size ranging from 0.5 micron to 10 micron and the Ni powder with a particle size ranging from 0.001 micron to 10 micron 2 o 3 Powder 50% is evenly mixed into material powder, and then evenly mixed into the weight ratio of material powder: binder = 100:1.5 binder polyvinyl alcohol, thus being prepared as aluminum / metal oxide composite powder for thermal spraying , the above percentages are percentages by weight;

[0062] The second step is to sandblast the surface of the workpiece:

[0063] The second step is to sandblast the surface of the workpiece:

[0064] Sand blast the surface of the TA12 titanium alloy workpiece to be coated;

[0065] The third step, preparation of oxide-based coating:

[0066] The aluminum / metal oxide composite powder prepared in the first step is sprayed on the surface of the TA...

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Abstract

The invention relates to a preparing method for a surface oxide-based coating of a titanium alloy and a titanium-aluminum intermetallic compound, and relates to plating on metal materials. The preparing method comprises the steps that aluminum / metal oxide composite powder used for thermal spraying is prepared; the surface of a titanium alloy workpiece or a titanium-aluminum intermetallic compound workpiece needing to be coated is subjected to sand blasting; and a thermal spraying method is adopted, the aluminum / metal oxide composite powder prepared in the first step is sprayed to the surface of the titanium alloy workpiece or the titanium-aluminum intermetallic compound workpiece obtained in the second step, and accordingly, the oxide-based coating is formed. According to the method, the universal and inherent step that in the prior art, before a ceramic-based inorganic composite coating is sprayed to a metal base body, an alloy bottom layer, namely a combining layer is sprayed firstly is omitted, and the defects that in the prior art, the alloy bottom layer is sprayed firstly, consequently, the ceramic-based inorganic composite coating technology is complex, cost is obviously increased, and the coating thermal shock resistance is poor are overcome.

Description

technical field [0001] The technical solution of the invention relates to the plating of metal materials, specifically the preparation method of oxide-based coatings on the surface of titanium alloys and titanium-aluminum intermetallic compounds. Background technique [0002] Titanium alloy has excellent properties such as low density, high specific strength, corrosion resistance, good low temperature resistance and stable medium temperature performance. It can work at a high temperature of 550°C and a low temperature of minus 250°C for a long time and maintain stable performance. Therefore, titanium alloys are widely used in aerospace, marine engineering, weaponry, ships, auto parts, petrochemical, biomedical and other fields due to their excellent comprehensive properties. However, titanium alloys have low hardness, large friction coefficient, poor wear resistance, low high temperature (higher than 600°C) oxidation resistance, and are poor conductors of heat; when used in ...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/134C23C4/129C23C4/126
CPCC23C4/06
Inventor 杨勇陈学广王磊褚振华董艳春阎殿然张建新
Owner HEBEI UNIV OF TECH
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