Blade member of tungsten-carbide-based cemented carbide for cutt

Details Blade member of tungsten-carbide-based cemented carbide for cutt Blade member of tungsten-carbide-based cemented carbide for cutt

1989-10-31

1992-04-21

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

51295, 51307, 51309, 76DIG11, 407119, 428408, 428457, 428469, 428697, 428698, B32B 900

Patent

active

051066742

ABSTRACT:
A blade member of tungsten carbide based cemented carbide for cutting tools has a tungsten carbide based cemented carbide substrate having a hard phase, a binder phase and unavoidable impurities. The hard phase has 5% to 60% by weight of one or more of carbide and carbo-nitride of titanium, tantalum and tungsten, and carbide and carbonitride of titanium, tantalum, niobium and tungsten. The binder phase has 3% to 10% by weight of cobalt and a balance tungsten carbide. The substrate has a surface softening layer having a cobalt-pool phase and an interior portion. The surface softening layer has an outermost region in which hardness is generally constant with respect to depth from the substrate surface and an inner region in which hardness rises inwardly of the substrate up to the hardness of the interior portion. There is also disclosed a process for producing the above-mentioned blade member.

REFERENCES:
patent: 4359335 (1982-11-01), Garner
patent: 4642003 (1987-02-01), Yoshimura
patent: 4698266 (1987-10-01), Buljan et al.

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