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Method for preparing high-content WC (Wolfram Carbide) enhanced alloy powder coating

An alloy powder, high-content technology, applied in metal material coating process, coating and other directions, can solve the problems of low bonding strength, thin coating, large deformation of workpiece, etc., achieve excellent corrosion resistance and high temperature performance, and improve service life , the effect of coating performance enhancement

Active Publication Date: 2013-09-11
无锡新松机器人自动化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since superhard and wear-resistant materials such as tungsten carbide are generally coated on the surface of parts by means of traditional surface engineering techniques, such as spraying, spray welding, deposition, etc., the quality of the coating often has the following deficiencies, such as low density, crystal Coarse grain structure, serious oxidation, easy to fall off, thin coating, large workpiece deformation and other problems, resulting in the excellent performance of cermet materials can not be fully exerted
For example, the Chinese invention patent "Application No. 200710150142.6" introduces a method of preparing WC / Co powder coating by supersonic flame spraying, but it has the disadvantages of non-metallurgical bonding, easy peeling off, and low microhardness of the coating; The Chinese invention patent "Application No. 200910067143.3" has invented a coating preparation method for tungsten carbide ceramic particles reinforced metal matrix composites, but there are problems of low content of tungsten carbide hard phase, thin coating and low bonding strength

Method used

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  • Method for preparing high-content WC (Wolfram Carbide) enhanced alloy powder coating
  • Method for preparing high-content WC (Wolfram Carbide) enhanced alloy powder coating
  • Method for preparing high-content WC (Wolfram Carbide) enhanced alloy powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Adopt the method of the present invention to carry out the laser cladding treatment of WC reinforced alloy powder coating to the pick of mining industry, the process is as follows:

[0020] In terms of weight percentage, the hard reinforcing phase WC content is 50%, and the bonding phase powder is iron-based self-fluxing alloy powder with a brand name of XS-F50, with a content of 50%. After the two are mixed, put them into a powder mixer and fully stir them. uniform. After the surface of the pick is polished and cleaned, laser cladding is carried out. The process parameters are: laser power 3.0KW, scanning speed 700mm / min, spot diameter 3.0mm, lap rate 30%, single-layer cladding thickness 1.2mm, cladding layer.

[0021] In this example, the air-borne coaxial powder feeding method is used to feed the WC composite powder into the laser melting pool. The coaxial powder feeding system is equipped with an argon gas protection function, which can well protect the laser melti...

Embodiment 2

[0023] Using the method of the present invention to carry out the laser cladding treatment of WC reinforced alloy powder coating on the blast furnace lining plate, the process is as follows:

[0024] In terms of weight percentage, the hard reinforcing phase WC content is 70%, and the bonding phase powder is nickel-based self-fluxing alloy powder with a brand name of XS-N30, with a content of 30%. After the two are mixed, put them into a powder mixer and fully stir them. uniform. After the surface of the workpiece is polished and cleaned, laser cladding treatment is carried out. The process parameters are: laser power 6.0KW, scanning speed 2000mm / min, spot diameter 6.0mm, lap rate 50%, single-layer cladding thickness 2.0mm, cladding two Floor. In this embodiment, the powder feeding method is the same as in Embodiment 1.

[0025] like image 3 As shown, the grains of the coating prepared in this example are fine and dense, and the coating structure is mainly composed of WC, F...

Embodiment 3

[0027] Using the method of the present invention to carry out the laser cladding treatment of WC reinforced alloy powder coating on the blast furnace lining plate, the process is as follows:

[0028] In terms of weight percentage, the hard reinforcing phase WC content is 60%, and the cobalt-based self-fluxing alloy powder with the brand name XS-C40 is selected as the bonding phase powder, and the content is 40%. After the two are mixed, put them into a powder mixer and fully stir them. uniform. After the workpiece surface is polished and cleaned, laser cladding treatment is carried out. The process parameters are: laser power 5.0KW, scanning speed 1500mm / min, spot diameter 4.5mm, lap rate 50%, single-layer cladding thickness 2.5mm, cladding two Floor. In this embodiment, the powder feeding method is gravity powder feeding, and argon gas is used for protection during the cladding process.

[0029] like Figure 4 As shown, the grain structure of the coating prepared in this e...

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Abstract

The invention belongs to the field of material surface engineering and in particular relates to a method for preparing a high-content WC (Wolfram Carbide) enhanced alloy powder coating by employing a laser cladding technology. The composite powder is clad on the surface of a workpiece by employing laser cladding, wherein the composite powder is prepared from WC powder and bonding-phase alloy powder according to a weight ratio, the content of WC powder in the composite powder is 50-70wt%, and the content of bonding-phase alloy powder is 30-50wt%. The WC enhanced alloy powder composite functional coating is prepared by employing the process method, the wear resistance and high-temperature performance of the workpiece are greatly improved after treatment, the service life is prolonged by over 8 times, and the economic benefits are obvious.

Description

technical field [0001] The invention belongs to the field of material surface engineering, in particular to a method for preparing a high-content WC reinforced alloy powder coating by using laser cladding technology. Background technique [0002] Wear is one of the main manifestations of component failure. Due to adverse consequences such as component failure and machine equipment shutdown caused by wear, material and energy are greatly wasted, and production costs increase sharply. Since the beginning of the 21st century, with the development of modern large-scale industrial production, higher requirements have been put forward for the comprehensive performance of various parts, such as wear resistance, corrosion resistance, oxidation resistance, and impact resistance. In recent years, with the rapid development of material surface engineering technology, cermet materials, such as tungsten carbide and titanium carbide, have been widely used in production because of their ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 于恩洪邢飞王晓东石磊
Owner 无锡新松机器人自动化有限公司
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