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Preparation method for wear-resistant and corrosion-resistant composite coating layer

A composite coating, corrosion-resistant technology, applied in the direction of coating, metal material coating process, additive processing, etc., can solve the problem of unstable quality of cladding layer, achieve large elastic modulus, good corrosion resistance, Good wear resistance

Inactive Publication Date: 2018-10-02
HUNAN UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, Q960 steel is used as the cladding matrix, a mixture of tungsten carbide powder and Stellite 6 alloy powder is used as the cladding material, and the coaxial powder feeding method is used for laser cladding under the action of a laser, which not only effectively solves the problem of unstable cladding layer quality problem, and the preparation process is simple, high efficiency, and no pollution to the environment

Method used

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  • Preparation method for wear-resistant and corrosion-resistant composite coating layer
  • Preparation method for wear-resistant and corrosion-resistant composite coating layer
  • Preparation method for wear-resistant and corrosion-resistant composite coating layer

Examples

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Embodiment 1

[0041] This embodiment provides a method for preparing a wear-resistant and corrosion-resistant composite coating, which specifically includes the following steps:

[0042] S1. Cladding substrate pretreatment: use Q960 steel as the cladding substrate, polish its surface with 600-grit sandpaper, and then use 95% ethanol solution to clean the oil and rust on the surface, and the cleaning time is 5 minutes;

[0043] S2. After drying the tungsten carbide powder and the Stellite 6 alloy powder, mix them uniformly in a mass ratio of 30:70 to make a mixed powder;

[0044] Among them, the process parameters of the drying treatment are: the drying temperature is 80°C, the drying time is 30 minutes, the particle size of the tungsten carbide powder is 60 μm, and the particle size of the Stellite 6 alloy powder is 50 μm;

[0045] S3. Using STAUBLTX90 CNC laser combined with coaxial powder feeding method to clad tungsten carbide powder and Stellite6 alloy powder on the surface of Q960 stee...

Embodiment 2

[0048] This embodiment provides a preparation method of a wear-resistant and corrosion-resistant composite coating, referring to the preparation method of Example 1, the difference from Example 1 is that in step S3, the power of the laser is 550W.

Embodiment 3

[0050] This embodiment provides a preparation method of a wear-resistant and corrosion-resistant composite coating, referring to the preparation method of Example 1, the difference from Example 1 is that in step S3, the power of the laser is 450W.

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Abstract

The invention discloses a preparation method for a wear-resistant and corrosion-resistant composite coating layer. The preparation method specifically comprises the following steps: S1. carrying out pretreatment on a cladding matrix; S2. carrying out drying treatment on a cladding material; S3. melting the cladding material and the surface layer of the cladding matrix simultaneously through a laser device and in combination with a coaxial powder feeding method to form an alloy coating layer, that is, the high-hardness corrosion-resistant layer, wherein the cladding matrix in the step S1 is made from Q960 steel; and the cladding material in the step S2 is made from the mixture of tungsten carbide powder and Stellite 6 alloy powder. According to the preparation method disclosed by the invention, the composite coating layer is creatively prepared on the surface of the Q960 steel through a laser cladding technology; the tungsten carbide powder and the Stellite 6 alloy powder are mixed as the cladding material in a specific ratio; and the process parameters of the laser cladding technology are scientifically and reasonably designed, so that the problems of low hardness and short servicelife under the working condition of abrasive wear, of a laser cladding coating layer made from Stellite 6 cobalt alloy, are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of laser additive manufacturing, and more specifically relates to a preparation method of a wear-resistant and corrosion-resistant composite coating. Background technique [0002] Aircraft structural parts, engine parts, metal molds and other high value-added parts often fail due to local damage caused by wear, high temperature gas erosion and ablation, high and low cycle fatigue, and external force damage. Therefore, it is very important to carry out surface treatment on the above-mentioned parts to improve the mechanical properties such as hardness, wear resistance, corrosion resistance and fatigue resistance of the surface of the parts. At present, the commonly used method is to use laser cladding technology to prepare coatings on the surface of parts. [0003] Laser cladding technology is an emerging part processing and surface modification technology, which has the characteristics of small dilution, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00C23C24/103
Inventor 阳建君汤伟张楠罗登柳萧蒋涵坤程畅栋刘丹范才河李芳芳吴艳辉孙斌欧玲覃喆华
Owner HUNAN UNIV OF TECH
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