A 12 tungsten carbide cobalt coating will have a typical micro hardness of 1100 to 1350 dph300.
Hvof tungsten carbide coating hardness.
Tungsten carbide coating is done through a process known as high velocity oxygen fuel spraying hvof.
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.
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.
Wc is a chemical compound specifically a carbide containing equal parts of tungsten and carbon atoms.
Tungsten carbide with a vickers number of 1700 2400 85 hrc equivalent is composed of 90 carbide particles by weight 80 by volume.
Most kermetico guns are good to spray wc 12co coatings.
Hvof tungsten carbide coatings material properties.
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.
Ehc reference was introduced in.
In these challenging environments erosion abrasion and corrosion are some of the most common issues.
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.
Thus tungsten carbide coatings and ceramic coatings are particularly effective in conditions of extreme wear.
It is by far the most preferred method of coating owing to the many benefits it presents.
Tungsten carbide chemical formula.
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.
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.
Tungsten carbide is a chemical carbide containing equal parts of tungsten and carbon atoms.
Wear resistant thermal spray coatings of tungsten carbide are used for their hardness and wear resistance.
Domex355 steel substrates were sprayed to a targeted coating thickness of 380 microns.
Hvof tungsten carbide coatings are often applied to roll surfaces used in paper production.
In 1988 sulzer metco introduced its first hvof coating solutions with a new line of spray equipment and materials.
Most standard wear resistant alloys contain a maximum of 35 by volume of softer chromium carbide.
