A preparation method of amorphous nickel-phosphorus-tungsten carbide powder composite coating

A composite coating, amorphous nickel technology, applied in the field of preparation of amorphous nickel-phosphorus tungsten carbide powder composite coating, can solve problems such as no literature reports, achieve wide applicability, improve hardness and wear resistance, have The effect of contributing to corrosion resistance

Inactive Publication Date: 2017-07-07
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the amorphous nickel-phosphorus-tungsten carbide powder composite coating technology is combined with the laser surface modification technology, and the method for improving the coating performance has not been reported in the literature.

Method used

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  • A preparation method of amorphous nickel-phosphorus-tungsten carbide powder composite coating
  • A preparation method of amorphous nickel-phosphorus-tungsten carbide powder composite coating
  • A preparation method of amorphous nickel-phosphorus-tungsten carbide powder composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) 45 steel sample, size

[0051] (2) Mechanically grind the 45 steel sample, and grind it step by step with 400, 600, 800, and 1000 mesh sandpaper to make the surface smooth and bright, then use deionized water to clean it ultrasonically, and then immerse the sample in acetone solution for ultrasonic cleaning Wash in the container for 5 minutes, remove grease, rinse with deionized water and dry; then put in sulfuric acid solution with a mass fraction of 15% to 20% for pickling and activation treatment for 3 minutes, and rinse with deionized water;

[0052] (3) Preparation of chemical plating solution and powder composite chemical plating solution

[0053]The chemical plating solution composition ratio is expressed in g / L as:

[0054] Nickel sulfate 25, sodium hypophosphite 30, sodium acetate 30, ammonium sulfate 30, lead acetate 1.

[0055] Plating solution configuration method:

[0056] (a) take by weighing required amount of nickel sulfate, sodium hypophosphite...

Embodiment 2

[0078] (1) Alloy steel 42CrMo sample, size 20mm×10mm×5mm

[0079] (2) The plating solution formula and steps (2) (3) (4) (5) (6) (7) of the present embodiment are exactly the same steps as in the above-mentioned embodiment 1. In the step (8), the voltage used in the pulse laser treatment is 600V, and the others are the same, and the surface hardness of the coating is 850HV, which is characterized by an amorphous coating by XRD analysis.

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Abstract

The invention discloses a method for preparing an amorphous nickel-phosphorus-tungsten carbide powder composite coating. Including the following steps: (1) The surface of the carbon steel or alloy steel sample is mechanically polished, smooth and bright, and activated; (2) Pre-plating primer: the sample is plated in a neutral chemical plating solution with pH=7 for 20 to 30 minutes , to obtain a certain thickness of nickel-phosphorus primer; (3) powder composite electroless plating: after pre-plating, the sample is placed in the tungsten carbide powder composite plating solution, pH6~7, temperature 70°C~85°C, time 40~60min, Magnetic stirring to obtain nickel-phosphorus-tungsten carbide powder composite coating; (4) Replating: After composite plating, the sample is placed in a neutral plating solution at a temperature of 70°C to 85°C, plated for 20 to 30 minutes, washed with deionized water, and dried. Obtain a composite coating; (5) Use a pulsed nanosecond laser to laser treat the composite coating to obtain an amorphous high-hardness corrosion-resistant and wear-resistant nickel-phosphorus-tungsten carbide composite coating.

Description

technical field [0001] The invention relates to a powder composite electroless plating method on a steel substrate, in particular to a method for preparing an amorphous nickel-phosphorus-tungsten carbide powder composite coating, which belongs to the surface coating strengthening and anti-corrosion technology of metal materials. Background technique [0002] Electroless plating has a history of more than 60 years since its rise and development. As a surface modification technology, it has been widely used in petrochemical, machinery, automobile, electronics, textile and other industries. However, with the development of industry, people's requirements for the wear resistance of materials and parts have increased, and the traditional nickel-phosphorus coating can no longer meet the needs. In particular, the traditional hard chromium plating technology has been restricted due to its environmental pollution hazards. Therefore, it is urgent to seek a surface modification technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/36C23C18/50
Inventor 胡建文张贤
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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