Hvof Tungsten Carbide Coating Hardness

Thus tungsten carbide coatings and ceramic coatings are particularly effective in conditions of extreme wear.

Hvof tungsten carbide coating hardness.

Kermetico hvaf equipment to spray tungsten carbide cobalt coatings. Tungsten carbide chemical formula. Tungsten carbide coating is done through a process known as high velocity oxygen fuel spraying hvof. This tungsten carbide coating process involves the use of combustive thermal spray at high velocity to develop exceptional wear and corrosion resistance.

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. Hvof tungsten carbide coatings are often applied to roll surfaces used in paper production. Domex355 steel substrates were sprayed to a targeted coating thickness of 380 microns. Hvof tungsten carbide coatings material properties.

Hi usually in thermal spray applications they use to measure macrohardness that is only as reference value only to have an idea of the hardness of the coating and this value for wc17 co is about 65 to 72 hrc it depend of the system or parameters been used to obtain this values you must use an hvof system. In 1988 sulzer metco introduced its first hvof coating solutions with a new line of spray equipment and materials. Ehc reference was introduced in. Tungsten carbide is a chemical carbide containing equal parts of tungsten and carbon atoms.

Wc is a chemical compound specifically a carbide containing equal parts of tungsten and carbon atoms. When choosing a tungsten carbide powder the particle size and type of carbide selected are important in determining the correct material to combat various forms of erosion abrasion and wear whereas the amount of metal matrix in the coating nickel cobalt or alloy will depend on the. Most standard wear resistant alloys contain a maximum of 35 by volume of softer chromium carbide. Most kermetico guns are good to spray wc 12co coatings.

Wear resistant thermal spray coatings of tungsten carbide are used for their hardness and wear resistance. It is by far the most preferred method of coating owing to the many benefits it presents. Tungsten carbide with a vickers number of 1700 2400 85 hrc equivalent is composed of 90 carbide particles by weight 80 by volume. Two tungsten carbide powders with co matrix tab 1 and two tungsten carbide powders with co cr matrix fujimi incorporated japan were sprayed utilizing the hvaf m3 process uniquecoat us and the hvof jp5000 praxair.

We offer coating formulation options mainly tungsten carbide c1000 c1000ni c9000 and chromium carbide c4000. Uniform high hardness and ductility low stress and porosity lead to a substantial increase of service life of parts protected with kermetico hvaf wc co coatings in comparison with hvof tungsten carbide versions.