Sintered hard material

Details Sintered hard material Sintered hard material

1998-01-23

2000-02-29

Marcantoni, Paul

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 91, 501 92, 501 93, 75236, 75240, 75242, C04B 3556

Patent

active

060309121

ABSTRACT:
A sintered hard material according to the invention comprises 0.02 to 0.10 wt % of one or more metals selected from the group consisting of Fe, Co and Ni, 0.3 to 3.0 wt % of one or more compounds selected from the group consisting of carbides, nitrides and carbonitrides of transition metals of the IVa, Va and VIa groups of the periodic table and a residue of tungsten carbide component having an average particle size of 0.5 .mu.m or less, the tungsten carbide component containing WC and W.sub.2 C in a proportion W.sub.2 C/(WC+W.sub.2 C) of between 0.01 and 0.15, the W.sub.2 C in the tungsten carbide component having a lattice constant reduced by 0.3 to 1.5 %.

REFERENCES:
patent: 3480410 (1969-11-01), Hummer
patent: 4945073 (1990-07-01), Dubensky et al.
patent: 5089447 (1992-02-01), Timm et al.
patent: 5288676 (1994-02-01), Shimada et al.
patent: 5880382 (1999-03-01), Fang et al.
PCT/US89/04080 WO90/03348 (Japan Publication No. 3-505862).

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