Tungsten Carbide Coating Hardness
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Tungsten carbide is a chemical carbide containing equal parts of tungsten and carbon atoms.
Tungsten carbide coating hardness. A wolfram carbide hard metal coating is either carried out with self fluxing powder flame spraying according to din en iso 14920 1999 or with hvof high speed flame spraying. Hvof tungsten carbide coatings material properties. Wc 12co thermal spray coatings are usually harder compared to coatings of wc 17co as a result of higher tungsten carbide levels in the coating. Hardness of hvof tungsten carbide coatings is greater than 70 rc rock well scale compared with typical values of 60 to 70 rc for hard chrome plating.
Tungsten carbide wc is a chemical compound made up of equal parts of both tungsten and carbon making it a stronger material than steel and titanium. Tungsten carbide materials are recommended for wear applications with service temperatures of less than 500 degrees celsius as higher temperatures will result in the formation of brittle phases that reduce wear resistance and coating integrity. Plasma sprayed carbide coatings may be selected to achieve a higher texture as sprayed. In its most basic form tungsten carbide is a fine gray powder but it can be pressed and formed into shapes through a process called sintering for use in industrial machinery cutting tools abrasives armor piercing shells and jewellery.
Tungsten carbide s hardness level is comparable with corundum and can only be polished and finished with abrasives of superior hardness such as cubic boron nitride and diamond powder wheels and. The tungsten carbide wc 12co coatings are resistant to sliding wear impact abrasion and fretting at temperatures up to 510 c 950 f preferably in non corrosive media. Microhardness values for the tungsten carbide coating are on the order of 1050 dph 300 diamond pyramid hardness compared with values of 750 to 850 dph that are typ ical of hard chrome plate. Tungsten carbide is the most versatile and widely used of our hvof applied coatings.
Most carbide coatings are applied by hvof to achieve the densest and most well bonded coatings available by thermal spray. Tungsten carbide chemical formula. We offer coating formulation options mainly tungsten carbide c1000 c1000ni c9000 and chromium carbide c4000. In both coating methods the wolfram tungsten carbide powder is sprayed on the surface of the work element as plastic and clings onto the previously sprayed base component.
Wc is a chemical compound specifically a carbide containing equal parts of tungsten and carbon atoms. Most standard wear resistant alloys contain a maximum of 35 by volume of softer chromium carbide. Tungsten carbide measures 90 on the rockwell c scale which approaches the hardness and durability of natural diamonds.
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