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Preparation method of titanium boride based inorganic composite coating

An inorganic composite material, titanium boride technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of high raw material cost, easy cracking of the coating, complicated preparation process, etc., to overcome the particle shape Irregularity, overcoming the effects of high cost of raw materials and simple preparation method

Active Publication Date: 2014-01-01
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is: to provide a preparation method of titanium boride-based inorganic composite material coating, with micron-sized metal Al powder, micron-sized, submicron-sized or nano-sized TiO 2 powder and micron, submicron or nanoscale B 4 The mixed powder of C powder is the raw material, and the Al and TiO in the mixed powder in the thermal spraying process 2 and B 4 C reacts with nitrogen in the powder feeding gas, and the main component is synthesized in situ as TiB 2 -TiC x N 1-x -Al 2 o 3 (where 0

Method used

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  • Preparation method of titanium boride based inorganic composite coating
  • Preparation method of titanium boride based inorganic composite coating
  • Preparation method of titanium boride based inorganic composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] First step, formulating TiO for thermal spraying 2 / B 4 C / Al composite powder;

[0047] Al powder with a particle size range of 1 micron to 5 microns, TiO with a particle size range of 0.001 micron to 0.1 micron 2 Powder and B with a particle size ranging from 0.5 microns to 5 microns 4 C powder is evenly mixed into a mixture powder, wherein the weight percentage of Al powder is 27%, TiO 2 The weight percentage of powder is 59%, B 4 The weight percent of C powder is 14%, and then uniformly mixed into polyvinyl alcohol with a weight ratio of material powder: binder = 100:1, thus being formulated into TiO2 for thermal spraying. 2 / B 4 C / Al composite powder;

[0048] The second step is to spray a layer of alloy primer on the surface of the metal workpiece to be coated

[0049] Shot peening is performed on the surface of the Q235 steel workpiece to be coated first, and then a layer of Ni-Al alloy bottom layer is sprayed on the surface of the Q235 steel workpiece afte...

Embodiment 2

[0056] First step, formulating TiO for thermal spraying 2 / B 4 C / Al composite powder;

[0057] Al powder with a particle size range of 1 micron to 10 microns, TiO with a particle size range of 0.001 micron to 0.1 micron 2 Powder and B with particle size ranging from 0.001 micron to 0.5 micron 4 C powder is evenly mixed into a mixture powder, wherein the weight percentage of Al powder is 27%, TiO 2 The weight percentage of powder is 59%, B 4 The weight percent of C powder is 14%, and then uniformly mixed into the methyl cellulose with a weight ratio of material powder: binder = 100:0.8, thus being formulated into TiO for thermal spraying 2 / B 4 C / Al composite powder;

[0058] The second step is to spray a layer of alloy primer on the surface of the metal workpiece to be coated

[0059] Shot peening is performed on the surface of the 45 steel workpiece to be coated first, and then a layer of Fe-Al alloy bottom layer is sprayed on the surface of the 45 steel workpiece afte...

Embodiment 3

[0063] Except that the metal workpiece to be coated is a Q195 steel workpiece, the others are the same as in Embodiment 1.

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Abstract

Relating to plating of metal materials, the invention provides a preparation method of a titanium boride based inorganic composite coating. The mixed powder of micron-sized metal Al powder, micron-sized, submicron-sized or nano-sized TiO2 powder, and micron-sized, submicron-sized or nano-sized B4C powder is taken as a raw material, the mixed powder is sprayed on the alloy underlayer surface of a metal or alloy workpiece surface by thermal spraying. During thermal spraying, the Al, TiO2 and B4C in the mixed powder react with nitrogen in a powder feeding gas to synthesize the titanium boride based inorganic composite coating in situ. The method provided in the invention overcomes the defects of high raw material cost, complicated preparation process, high energy consumption, low efficiency, difficult control of coating processing precision, low coating density, poor coating uniformity, weak binding force between the coating and a substrate, low coating toughness, easy coating cracking, and unsuitability for application in large-scale industrial production existing in the prior art for preparation of titanium boride based composite coatings.

Description

technical field [0001] The technical solution of the invention relates to the plating of metal materials, specifically the preparation method of the titanium boride-based inorganic composite material coating. Background technique [0002] Inorganic material coatings are the first choice for wear-resistant, corrosion-resistant and high-temperature resistant coatings. Boride-based inorganic material coatings are one of the most widely used inorganic material coatings. For example, titanium boride-based and zirconium boride-based inorganic material coatings are widely used as coating materials to improve the surface properties of the overall material. TiB 2 It has many excellent properties such as high melting point, high hardness, low density, good wear resistance and high chemical corrosion resistance, and is widely used in aerospace, weaponry, metallurgy and cutting tools, as cutting tools, electrodes, turbines, etc. Protection for blades, combustion chambers, chemical rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/04C23C4/06C23C4/131
Inventor 杨勇陈学广褚振华王磊董艳春阎殿然张建新袁立武张旭宁
Owner HEBEI UNIV OF TECH
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