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A preparation method of tungsten carbide anti-corrosion and wear-resistant composite coating

An anti-corrosion and wear-resistant, composite coating technology, applied in the field of material processing, can solve the problems of poor coating density, manual operation, cumbersome production, affecting anti-corrosion and wear resistance, etc., to prevent agglomeration, facilitate mechanized operation, coating Efficient effect

Inactive Publication Date: 2016-08-24
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the disadvantages of using "metal cloth" technology in the preparation process of the above-mentioned tungsten carbide wear-resistant composite coating, which has the disadvantages of manual operation and cumbersome production. The compactness of the layer is poor, which further affects its anti-corrosion, wear-resistant performance and other technical problems. A preparation method for a tungsten carbide anti-corrosion and wear-resistant composite coating is provided. The method adopts a vacuum brazing method, and the final obtained tungsten carbide anti-corrosion The abrasive composite coating has the characteristics of compactness, high hardness and high corrosion resistance

Method used

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  • A preparation method of tungsten carbide anti-corrosion and wear-resistant composite coating
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  • A preparation method of tungsten carbide anti-corrosion and wear-resistant composite coating

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Embodiment 1

[0036] A preparation method of tungsten carbide anti-corrosion wear-resistant composite coating, specifically comprising the following steps:

[0037] (1) Mix tungsten carbide particles, anticoagulant, nickel-based solder and water-based epoxy adhesive evenly to form a slurry containing tungsten carbide particles, anti-coagulant, nickel-based solder and water-based epoxy adhesive material, and then sprayed on the metal substrate to be protected, and dried naturally to obtain a metal substrate with a coating material with a thickness of about 1mm;

[0038] The above-mentioned slurry containing tungsten carbide particles, anticoagulant, nickel-based solder and water-based epoxy adhesive, calculated by mass percentage, its raw material composition and content are as follows:

[0039] Tungsten carbide particles 48.6%

[0040] Anticoagulant 1%

[0041] Nickel-based solder 30.4%

[0042] Water-based epoxy adhesive 20%;

[0043] The diameter of the tungsten carbide particles is 1...

Embodiment 2

[0051] A preparation method of tungsten carbide anti-corrosion wear-resistant composite coating, specifically comprising the following steps:

[0052] (1) Mix cobalt-coated tungsten carbide particles, anticoagulant, nickel-based solder and water-based epoxy adhesive evenly to form a cobalt-coated tungsten carbide particle, anti-coagulant, nickel-based solder and water-based epoxy adhesive. The slurry of the adhesive is then sprayed on the metal substrate to be protected, and then dried naturally to obtain a metal substrate sprayed with a coating material with a thickness of about 1mm;

[0053] The above-mentioned slurry containing cobalt-coated tungsten carbide particles, anticoagulant, nickel-based solder and water-based epoxy adhesive, calculated by mass percentage, its raw material composition and content are as follows:

[0054] Cobalt coated tungsten carbide particles 60.5%

[0055] Anticoagulant 1%

[0056] Nickel-based solder 28.5%

[0057] 0.1% water-based epoxy adh...

Embodiment 3

[0066] A preparation method of tungsten carbide anti-corrosion wear-resistant composite coating, specifically comprising the following steps:

[0067] (1) Mix cobalt-coated tungsten carbide particles, anticoagulant, nickel-based solder and water-based epoxy adhesive evenly to form a cobalt-coated tungsten carbide particle, anti-coagulant, nickel-based solder and water-based epoxy adhesive. The slurry of the adhesive is then sprayed on the metal substrate to be protected, and then dried naturally to obtain a metal substrate sprayed with a coating material with a thickness of about 1mm;

[0068] The above-mentioned slurry containing cobalt-coated tungsten carbide particles, anticoagulant, nickel-based solder and water-based epoxy adhesive, calculated by mass percentage, its raw material composition and content are as follows:

[0069] Cobalt coated tungsten carbide particles 50.5%

[0070] Anticoagulant 1%

[0071] Nickel-based solder 28.5%

[0072] 0.1% water-based epoxy adh...

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Abstract

The invention discloses a method for preparing a tungsten carbide anti-corrosion and wear-resistant composite coating, that is, first spraying a slurry containing tungsten carbide particles, an anticoagulant, a nickel-based solder and a water-based epoxy adhesive on a metal substrate, and naturally Dry to obtain a metal substrate sprayed with coating materials, and then in a vacuum brazing furnace, control the temperature rise rate to 20°C / min, rise from room temperature to 350°C for 20 minutes, and then continue to rise at a rate of 20°C / min Sinter at 1050-1200°C for 30 minutes, then control the cooling rate to 20°C / min for cooling, and cool down to 500°C with nitrogen until room temperature, that is, a layer of tungsten carbide with a thickness of 0.5-3mm is formed on the surface of the metal substrate Anti-corrosion and wear-resistant composite coating. The coating has a compact structure, high bonding strength with the metal substrate, has the ability to resist impact, wear and corrosion, and has a service life of up to 36‑42 months.

Description

technical field [0001] The invention relates to a method for preparing a tungsten carbide anti-corrosion and wear-resistant composite coating, which belongs to material processing [0002] The field of material protection in engineering. Background technique [0003] Corrosion and wear are the main forms of failure of metal workpieces in various mechanical equipment. Research data show that 50% of mechanical equipment function failures are due to wear and corrosion. For example, as the single unit capacity of thermal power plants increases, the abrasion problem of thermal equipment becomes more prominent. Corrosion and wear problems have become an urgent problem to be solved in safe operation. In other industrial fields, such as chemical, paper, mining and plastics processing, many equipment have serious corrosion and wear problems. At present, people mainly use the method of preparing a coating on the surface of the workpiece to improve the wear resistance of the compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04B22F7/02B23K1/008B23K103/08
Inventor 张大全周腾高立新
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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