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Method for reaction plasma spraying nano crystal titanium nitride coating

A titanium nitride and nanocrystalline technology, which is applied in the coating, metal material coating process and other directions to achieve the effect of improving preparation efficiency, good chemical stability and low cost

Inactive Publication Date: 2005-05-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention realizes the use of low-power plasma spraying equipment to prepare high-melting-point ceramic coatings by using micron-sized metal powder, and solves the problem of preparing high-melting-point nanocrystalline ceramic coatings by plasma spraying

Method used

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  • Method for reaction plasma spraying nano crystal titanium nitride coating
  • Method for reaction plasma spraying nano crystal titanium nitride coating
  • Method for reaction plasma spraying nano crystal titanium nitride coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as Figure 20 As shown, spray coatings on Q235 steel in the following order:

[0052] (1) Spray corundum (Al 2 o 3 ), roughen the surface and expose a fresh metal surface;

[0053] (2) 500g, 140-320 mesh nickel-aluminum alloy powder (Ni90) is packed into a powder feeder; the powder feeder is produced by Beijing Entropy Cole Company; the nickel-aluminum alloy powder is produced by Beijing Institute of Chemical Metallurgy.

[0054] (3) Connect the power supply of the spraying equipment control cabinet; the spraying equipment is produced by Jiujiang Spraying Equipment Factory;

[0055] (4) Delivery flow is 0.02m 3 / h of industrial nitrogen and 0.01m 3 / h of industrial argon;

[0056] (5) Turn on the power supply of the spray gun, adjust the air flow, control the arc power to 24.5KW, the spraying distance to 120mm, and the powder feeding air flow to 0.03m 3 / h, spray nickel-aluminum alloy (Ni90) bottom layer on the surface of the metal substrate; the spray gun is ...

Embodiment 2

[0075] The preparation process is the same as in Example 1, the process parameters for spraying the alloy bottom layer are the same as in Example 1, and the process parameters for spraying the TiN coating are different from Example 1.

[0076] Spray coating on Q235 steel in the following order:

[0077] (1) Spray corundum (Al 2 o 3 ), roughen the surface and expose a fresh metal surface;

[0078] (2) Put 500g, -140~+320 mesh nickel-aluminum alloy powder (Ni90) into the powder feeder; the powder feeder is produced by Beijing Entropy Cole Company;

[0079] (3) Connect the power supply of the spraying equipment control cabinet; the spraying equipment is produced by Jiujiang Spraying Equipment Factory;

[0080] (4) Delivery flow is 0.02m 3 / h of industrial nitrogen and 0.01m 3 / h of industrial argon;

[0081] (5) Turn on the power supply of the spray gun, adjust the air flow, control the arc power to 24.5KW, the spraying distance to 120mm, and the powder feeding air flow to ...

Embodiment 3

[0099] The preparation process is the same as in Example 1, the process parameters of the sprayed alloy bottom layer are the same as in Example 1, and the process parameters of the sprayed TiN coating are different from Examples 1 and 2

[0100] Spray coating on Q235 steel in the following order

[0101] (1) Spray corundum (Al 2 o 3 ), roughen the surface and expose a fresh metal surface;

[0102] (2) Put 500g, -140~+320 mesh nickel-aluminum alloy powder (Ni90) into the powder feeder; the powder feeder is produced by Beijing Entropy Cole Company;

[0103] (3) Connect the power supply of the spraying equipment control cabinet; the spraying equipment is produced by Jiujiang Spraying Equipment Factory;

[0104] (4) The delivery flow rate is 1.5L / h of industrial nitrogen and 1.5L / h of industrial argon;

[0105] (5) Turn on the power supply of the spray gun, adjust the air flow, control the arc power to 26KW, spray distance 110mm, powder feeding air flow 0.03m / h, spray nickel-a...

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Abstract

The reaction and plasma spraying process of preparing nano crystal titanium nitride coating on alloy base layer in metal or ceramic substrate includes the main steps of: pre-treating substrate, feeding mixed ion gas to start arc, feeding self-melting alloy powder into plasma flow for spraying to form the alloy base layer; and feeding nitrogen-containing reacting gas into the reaction chamber and feeding metal powder into the flame flow for spraying to form nano crystal titanium nitride coating on the alloy base layer. The process can form coating with raised toughness, wear resistance, friction reducing property and heat shock resistance, as well as thickness up to 600 microns, high smelting point, high hardness and excellent chemical stability. The present invention is mainly used in preparing high smelting point nano nitride ceramic coating.

Description

technical field [0001] The invention belongs to ceramic processing technology, in particular to a method for reactive plasma spraying nanocrystalline nitride coating. Background technique [0002] Nitride not only has the inherent excellent properties of general ceramics, but also exhibits metal properties such as good toughness, electrical conductivity, and thermal conductivity. Because of its special properties, it has attracted more and more attention. [0003] The current preparation method of nitride coating: physical vapor deposition method (cathodic arc deposition) and chemical vapor deposition method (magnetron sputtering, cathodic arc evaporation method, filter arc deposition, multi-arc ion plating technology, plasma enhanced CVD method) . [0004] Abroad, Japan's Akira Kobayashi (Akira kobayashi. Formation of TiN coatings by gas tunneltype plasma reactive spraying, Surface and Coatings Technology. 132 (2000) 152-157) prepared TiN with a thickness of 150 μm by reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C04B41/90C23C24/00
Inventor 阎殿然何继宁董艳春李香芝张建新
Owner HEBEI UNIV OF TECH
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