Tungsten Carbide Coating Hardness

This cermet composite coating combines the ductility of the metallic material with the high hardness of the ceramic tungsten carbide which results in the excellent properties associated with this coating.

Tungsten carbide coating hardness.

How can tungsten carbide coatings strengthen aircraft parts. In the case of tungsten carbide coatings hrc equivalents are very hit and miss and meaningless. Tungsten carbide is approximately twice as stiff as steel with a young s modulus of approximately 530 700 gpa 77 000 to 102 000 ksi and is double the density of steel nearly midway between that of lead and gold. While tungsten carbide is a hard brittle ceramic it is typically combined with nickel cobalt and or chrome when used as a coating.

Containing 88 tungsten carbide as a hard material and a cobalt matrix that functions as a binder material for the car bide particles. Wc 10co 4cr tungsten carbide cobalt chrome thermal spray powder for hvaf spraying carbide coatings. This is because softer wires wear away allowing the tungsten carbide to literally fall off the wear surface. Hardness varies but all cemented carbides are harder than the hardest metals.

It is comparable with corundum α al 2 o. All products are agglomerated and sintered powders coatings of these materials are harder compared to coatings of 83wc 17co as a result of higher tungsten carbide levels. 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. Widely used in fields such as machinery metallurgy petroleum and aerospace for their corrosion resistance high temperature resistance abrasion resistance and hardness are today s tungsten carbide coatings for applications used in industries throughout the world in general protective coatings are formed by these hard alloy.

As said by luigi it seems 91 seems to be a realistic value for hr15n rockwell superficial scale but not hrc. Tungsten carbide with a vickers number of 1700 2400 85 hrc equivalent is composed of 90 carbide particles by weight 80 by volume. 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. If you are considering increasing hardness you need to be cautious.

Wc co cr coating properties structure and applications. 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 compounds.