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Preparation method of chrome boride-based coating

A chromium boride-based, chromium boride-based technology, applied in the field of preparation of chromium boride-based coatings, can solve the problems of large pollution, high coating porosity, low coating thickness, etc., achieve simple preparation process, overcome technical problems Complex, highly dense effects

Inactive Publication Date: 2017-10-24
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a preparation method for chromium boride-based coatings, which uses thermal spraying in-situ reaction to synthesize chromium boride-based multiphase ceramic coatings, which overcomes the complex process of preparing chromium boride coatings in the prior art , high energy consumption, high pollution, low efficiency, low coating thickness, high coating porosity, low bonding force between coating and substrate and difficult powder preparation

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  • Preparation method of chrome boride-based coating
  • Preparation method of chrome boride-based coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The first step is to formulate the chromium oxide / boron carbide / aluminum composite powder for thermal spraying:

[0040] Evenly mix aluminum powder with a particle size range of 0.1 to 10 microns, chromium oxide powder with a particle size range of 0.001 to 10 microns, and boron carbide powder with a particle size range of 0.001 to 10 microns to form a composite powder, wherein, The weight percent that boron carbide powder accounts for these three kinds of raw material powders is 5%, and the weight percent that aluminum powder plus chromium oxide powder accounts for these three kinds of raw material powders is 95%, and the weight ratio between chromium oxide powder and aluminum powder is Then be 60: 40, then evenly mix into binder polyvinyl alcohol, the weight ratio of this binder polyvinyl alcohol consumption is above-mentioned composite powder: binding agent=100: 0.1, is thus formulated for thermal spraying Chromium oxide / boron carbide / aluminum composite powder;

[0...

Embodiment 2

[0046] The first step, formulating the chromium oxide / boron carbide / aluminum composite powder for thermal spraying:

[0047] Evenly mix aluminum powder with a particle size range of 0.1 micron to 10 microns, chromium oxide powder with a particle size range of 0.001 micron to 10 microns, and boron carbide powder with a particle size range of 0.001 micron to 10 microns to form a composite powder. Wherein boron carbide powder accounts for 18% by weight of the total mass of these three raw material powders, and the percentage by weight that aluminum powder plus chromium oxide powder accounts for the total mass of these three raw material powders is 82%, and the weight percentage between chromium oxide powder and aluminum powder The ratio is 74: 26, and then uniformly mixed into the binder polyvinyl alcohol, the weight ratio of the binder polyvinyl alcohol is the above-mentioned composite powder: binder = 100: 0.5, thus being prepared for thermal spraying Chromium oxide / boron carbi...

Embodiment 3

[0055] Step 1: Formulate chromium oxide / boron carbide / aluminum composite powder for thermal spraying:

[0056] Evenly mix aluminum powder with a particle size range of 0.1 to 10 microns, chromium oxide powder with a particle size range of 0.001 to 10 microns, and boron carbide powder with a particle size range of 0.001 to 10 microns to form a composite powder, wherein, Boron carbide powder accounts for 30% by weight of the total mass of the three raw material powders, aluminum powder plus chromium oxide powder accounts for 70% by weight of the total mass of the three raw material powders, and the weight ratio between the chromium oxide powder and the aluminum powder Then it is 90:10, and then uniformly mixed into the binder polyvinyl alcohol, the weight ratio of the binder vinyl alcohol amount is the above-mentioned composite powder: binder=100:1, thus being prepared as an oxidation agent for thermal spraying Chromium / boron carbide / aluminum composite powder;

[0057] The seco...

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Abstract

The invention provides a preparation method of a chrome boride-based coating, and relates to plating of metal materials with chrome boride. Chrome boride-based compound ceramic coatings are synthesized through thermal spraying in-situ reaction. The method comprises the steps of preparing chrome oxide / boron carbide / aluminum composite powder for thermal spraying; pretreating metal matrix materials; preparing the chrome boride-based coating. According to the preparation method provided by the invention, the shortcomings of complicated preparation technology of the chrome boride coating, high energy consumption, severe pollution, low efficiency, small coating thickness, high coating porosity, weak binding force between the coating and the matrix, and difficult powder preparation in the prior art are overcome.

Description

technical field [0001] The technical scheme of the invention relates to the plating of metal materials with borides, in particular to the preparation method of chromium boride-based coatings. Background technique [0002] With the rapid development of aviation, aerospace and modern new manufacturing industries, the requirements for high temperature resistance and wear resistance of materials are becoming more and more stringent. For example, in the field of aerospace, many parts often need to work under the extreme conditions of ultra-high temperature and high vacuum and strong corrosion. At this time, there are very strict requirements on the melting point and corrosion resistance of the material; And carbon fiber composite materials are used more and more in the aviation field, and there are more and more difficult-to-cut materials, and the requirements for the hardness of cutting tools are getting higher and higher, and traditional tools have been difficult to meet the re...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06C23C4/129C23C4/126
CPCC23C4/134C23C4/06C23C4/126C23C4/129
Inventor 杨勇任先行褚振华陈学广王磊董艳春张建新阎殿然
Owner HEBEI UNIV OF TECH
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