Tungsten carbide-containing hard alloy that may be processed...

Details Tungsten carbide-containing hard alloy that may be processed... Tungsten carbide-containing hard alloy that may be processed...

C - Chemistry, Metallurgy

22

C

C22C 1/10 (2006.01) B23K 35/32 (2006.01) C22C 29/06 (2006.01) C22C 29/08 (2006.01) C22C 32/00 (2006.01) C22C 33/02 (2006.01)

Patent

CA 2060889

A matrix-bonded carbide-containing composition material of high hardness is provided herein. Such composite material comprises a matrix-bonded carbide-containing composite material, It includes a matrix having a composition of from about 15 to about 45 percent by weight chromium, from 0 to about 3 percent by weight silicon, from about 2 to about 6 percent by weight boron, from about 3 to about 11 percent by weight titanium less than about 2 percent by weight of at least one element, namely, manganese, cobalt, nickel, molybdenum, or carbon, and the balance iron. It also includes a dispersion of tungsten carbide in the matrix, the tungsten carbide being present in an amount of from about 15 to about 60 percent by weight of the total material, and the matrix being present in a corresponding amount of from about 85 to about 40 percent by weight of the total material. During melting, the tungsten carbide particle size is reduced by interaction with the liquid phase. The melting can be accomplished by a conventional melt casting procedure, or by welding or by any other technique that produces a liquid matrix phase. The fine tungsten carbide particles which are produced during melting exhibit little if any settling, so that the final solidified product is macroscopically homogeneous.

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