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Method for preparing tungsten-infiltrated composite coating

A composite coating and tungsten infiltration technology, applied in coatings, metal material coating processes, ion implantation plating, etc., can solve the problem of limited wear resistance improvement of tungsten coatings

Active Publication Date: 2021-11-26
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the tungsten coating formed by the above technologies has very limited improvement in the wear resistance of the material.

Method used

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  • Method for preparing tungsten-infiltrated composite coating
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  • Method for preparing tungsten-infiltrated composite coating

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for preparing a tungsten-infiltrated composite coating, comprising the following steps:

[0027] Grinding the carbon steel, the roughness of the carbon steel surface after treatment is 2.5; then fix the carbon steel, and use the pulse explosion-plasma technology to process the carbon steel, and use the tungsten rod as the Positive electrode, pulse type explosion-plasma technology processing power is 12kW, the vertical distance between the explosion spray gun and the carbon steel surface is 40mm, the impact frequency of the pulse type explosion treatment is 2 times / second, the action direction of the explosion spray gun and the carbon steel surface The included angle is 85°.

[0028] In this embodiment, the volume ratio of oxygen, nitrogen and propane is 2:3:1, and the flow rate of the mixed gas is 10 L / min.

Embodiment 2

[0030] A method for preparing a tungsten-infiltrated composite coating, comprising the following steps:

[0031] Grind the carbon steel, and the surface roughness of the carbon steel after treatment is 3.5; then fix the carbon steel, and use the pulse explosion-plasma technology to process the carbon steel, and use the tungsten rod as the Positive electrode, pulse type explosion-plasma technology processing power is 18kW, the vertical distance between the explosion spray gun and the carbon steel surface is 60mm, the impact frequency of the pulse type explosion treatment is 10 times / second, the action direction of the explosion spray gun is in line with the carbon steel surface The included angle is 95°.

[0032] In this embodiment, the volume ratio of oxygen, nitrogen and propane is 7:3:1, and the flow rate of the mixed gas is 120 L / min.

Embodiment 3

[0034] A method for preparing a tungsten-infiltrated composite coating, comprising the following steps:

[0035] Grind the carbon steel, and the surface roughness of the carbon steel after treatment is 3; then fix the carbon steel, and use the pulse explosion-plasma technology to process the carbon steel, and use the tungsten rod as the Positive electrode, pulse type explosion-plasma technology processing power is 15kW, the vertical distance between the explosion spray gun and the carbon steel surface is 50mm, the impact frequency of the pulse type explosion treatment is 5 times / second, the action direction of the explosion spray gun and the carbon steel surface The included angle is 90°.

[0036] In this embodiment, the volume ratio of oxygen, nitrogen and propane is 5:3:1, and the flow rate of the mixed gas is 50 L / min.

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Abstract

The invention relates to the technical field of metal material coating preparation, and provides a method for preparing a tungsten-infiltrated composite coating. The method comprises the following steps that a material is subjected to polishing treatment, and the roughness of the surface of the treated material is 2.5-3.5; and the material is treated by adopting a pulse type explosion-plasma technology, a tungsten rod is used as a positive electrode during the treatment of the pulse type explosion-plasma technology, the power during the treatment of the pulse type explosion-plasma technology is 12-18kW, the vertical distance between an explosion spray gun and the surface of the material is 40-60mm, and the impact frequency of the pulse type explosion treatment is 2-10 times per second. While the coating is prepared on the surface of the material, a tungsten permeation layer can be formed in the material, so that the coating of a composite structure is formed, the hardness of the surface of the material is greatly improved compared with that of the surface of the material before treatment, and the friction and wear resistance of the surface of the material is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of metal material coating preparation, in particular to a method for preparing a tungsten-infiltrated composite coating. Background technique [0002] With the continuous development of science and technology, the requirements for the wear resistance of components are also getting higher and higher. In order to enhance the hardness and wear resistance of parts, coatings are usually prepared on the surface of parts, among which tungsten is a commonly used material for preparing coatings. [0003] Metal tungsten is a refractory metal with high strength and hardness, good chemical stability, and is not easy to be corroded, but its high price and difficult processing characteristics limit its application. Therefore, metal tungsten is often used as a coating materials to improve the performance of the base material. At present, there are many methods for preparing tungsten coatings, which can be roughly summari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/48C23C14/16
CPCC23C14/32C23C14/48C23C14/16
Inventor 陆磊张明铭余玖明付青峰邹晋廖先金张林伟陆德平
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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