Abrasion and impact resistant coatings

Details Abrasion and impact resistant coatings Abrasion and impact resistant coatings

C - Chemistry, Metallurgy

23

C

C23C 24/08 (2006.01)

Patent

CA 2631579

A method of hard facing a metal substrate with a two-layer abrasion and impact resistant coating by fusing a softer inner first coat of a matrix alloy of nickel-, cobalt- or iron-base alloy with carbide particles onto the substrate and fusing a harder second outer coat of a matrix alloy of nickel-, cobalt- or iron-base alloy with angular carbide particles onto the softer inner first coat. The softer inner first coat preferably has a hardness of about 30 - 40 Rc and the harder outer second coat preferably has a hardness of about 50 - 60 Rc. The carbide particles preferably are tungsten carbide particles in the size range of about 60 to 250 µ and comprise about 55 to 65 wt% of each of the inner and outer coats.

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