Introduction to Tungsten Carbide Spraying

       Introduction of tungsten carbide spraying: In tungsten carbide, carbon atoms are embedded in the gaps of the tungsten metal lattice, without destroying the original metal lattice, forming an interstitial solid solution, so it is also called an interstitial (or insertion) compound. Tungsten carbide can be prepared by heating a mixture of tungsten and carbon at high temperature, and the presence of hydrogen or hydrocarbons can accelerate the reaction. If prepared with oxygenated compounds of tungsten, the final product must be vacuum treated at 1500°C to remove carbon oxides. Tungsten carbide is suitable for machining at high temperature, and can be used to make cutting tools, structural materials of kilns, jet engines, gas turbines, nozzles, etc. Another compound of tungsten and carbon is ditungsten carbide, the chemical formula is W2C, the melting point is 2860°C, the boiling point is 6000°C, and the relative density is 17.15. Its properties, preparation methods and uses are the same as those of tungsten carbide.

Cobalt-based tungsten carbide alloy powder or nickel-based tungsten carbide alloy powder and chromium-based tungsten carbide alloy powder are sprayed with HVOF. The hardness can reach HV1200 and high temperature resistance of 850 degrees, so that valve parts are resistant to wear, corrosion, high temperature and oxidation. . More than manual surfacing, chroming, carburizing, quenching and tempering, and processes, the production efficiency can be increased by more than 2 times, the production cost can be reduced by more than 50%, and the service life can be extended dozens of times.

Examples of tungsten carbide coating sprayed parts: gate, valve seat, valve core, plunger, ball, flange, valve stem The function and characteristics of supersonic TAFA 1343VM WC-17C0 spraying

1. The principle of spraying

Using a high temperature heat source, the powder material is melted and sprayed onto the working surface at a high speed to form a coating with special properties.

2. Application areas

Wear-resistant, anti-corrosion, heat insulation, paper making; railway, machinery, automobile, steel, petroleum, chemical industry, printing, aerospace, power coal. 3. Function and characteristics

1. Applying the thermal spraying process, according to the different requirements of the surface performance of the material parts, the corresponding materials can be used to make the surface performance of the parts after spraying change greatly.

2. The workpiece can obtain excellent wear resistance, corrosion resistance, heat resistance, heat insulation, insulation and other characteristics that the base material does not have, and prolong the service life several times to dozens of times.

3. While saving a lot of high-quality materials, it exerts incomparable excellent performance in conventional and other special provincial treatments.

4. Due to the superior performance of the workpiece, the inventory of materials and spare parts can be saved, the downtime rate can be greatly reduced, and the economic benefit can be improved.

3. Function and characteristics

1. Applying the thermal spraying process, according to the different requirements of the surface performance of the material parts, the corresponding materials can be used to make the surface performance of the parts after spraying change greatly.

2. The workpiece can obtain excellent wear resistance, corrosion resistance, heat resistance, heat insulation, insulation and other characteristics that the base material does not have, and prolong the service life several times to dozens of times.

3. While saving a lot of high-quality materials, it exerts incomparable excellent performance in conventional and other special provincial treatments.

4. Due to the superior performance of the workpiece, the inventory of materials and spare parts can be saved, the downtime rate can be greatly reduced, and the economic benefit can be improved.