Heat-resistant sintered hard alloy

Details Heat-resistant sintered hard alloy Heat-resistant sintered hard alloy

C - Chemistry, Metallurgy

22

C

C22C 29/14 (2006.01) C22C 1/05 (2006.01)

Patent

CA 2060723

A heat-resistant sintered hard alloy comprises 35% to 95% by weight of a WCoB type complex boride in a cobalt base alloy. The alloy contains 1.5% to 4.1% boron, 19.1% to 69.7% tungsten, optionally 1 to 25% chromium, the balance being cobalt and a maximum of 1% impurities. Nickel, iron and/or copper may be substituted for portions of the cobalt content.

Un alliage dur fritté résistant à la chaleur qui comprend 35 % à 95 % en poids d'un borure complexe de type WcoB dans un alliage à base de cobalt. L'alliage contient 1,5 % à 4,1 % de bore, 19,1 % à 69,7 % de tungstène, de façon optionnelle 1 à 25 % de chrome, le reste étant du cobalt et un maximum de 1 % d'impuretés. On peut remplacer une partie du cobalt par du nickel, du fer et/ou du cuivre.

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