Boron treated hard metal

C - Chemistry – Metallurgy – 04 – B

Patent

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261/5

C04B 35/56 (2006.01) C22C 1/05 (2006.01) C22C 29/08 (2006.01)

Patent

CA 1334434

A hard, relatively non-brittle, cemented carbide body is made by sintering pressed grade carbide powders in the presence of a boron-containing material such as boron nitride. During sintering, appreciable quantities of boron migrate or diffuse into the body to become incorporated throughout the microstructure of the carbide resulting in the formation of a third quarternary phase comprised of tungsten, cobalt, boron and carbon.

593448

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