Cermet sintered body

Details Cermet sintered body Cermet sintered body

1994-05-20

1995-10-31

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 96, 75242, C04B 3556

Patent

active

054629012

ABSTRACT:
A cermet sintered body excellent in wear resistance, oxidation resistance and toughness, which is suitable for cutting tools. The cermet sintered body includes: a hard dispersion phase in an amount of from 70 to 95 wt. %, which contains TiC and/or Ti(C, N) and carbides (excluding TiC) and/or nitrides of one or more kinds selected from a group consisting of elements in IVa, Va, and VIa groups of the periodic system, and a binder phase in an amount of from 5 to 30 wt. %, which contains one kind or two or more kinds of iron family elements. Moreover, the average particle size of a raw powder of TiC and/or Ti(C, N) is in the range of 1.0 .mu.m or less, and TiC and/or Ti(C, N) are directly dissolved in a solid state in the carbides (excluding TiC) and/or nitrides during sintering, to form a hard dispersion phase. The hard dispersion phase thus obtained mainly contains solid-solutions without any structure having a core, and which has a uniform distribution of composition.

REFERENCES:
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patent: 4636252 (1987-01-01), Yoshimura et al.
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patent: 4948425 (1990-08-01), Watanabe et al.
patent: 4990410 (1991-02-01), Saitoh et al.
patent: 5053074 (1991-10-01), Buljan et al.
patent: 5145505 (1992-09-01), Saito et al.
patent: 5306326 (1994-04-01), Oskarsson et al.
patent: 5330553 (1994-07-01), Weinl et al.

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