Coated cemented carbides and processes for the production of sam

Details Coated cemented carbides and processes for the production of sam Coated cemented carbides and processes for the production of sam

1992-10-07

1994-02-01

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Plural heating steps including sintering

419 10, 419 13, 419 15, 419 38, 419 54, 419 57, 427314, 427318, B22F 302, B22F 312, B22F 702, B05D 302

Patent

active

052830306

ABSTRACT:
A coated cemented carbide alloy, excellent in toughness as well as wear resistance and which is used for cutting tools and wear resistance tools is provided herein. This coated cemented carbide alloy is composed of a cemented carbide substrate consisting of a hard phase of at least one member selected from carbides, nitrides and carbonitrides of the Group IVb, Vb and VIb metals of Periodic Table and a binder phase consisting of at least one member selected from the iron group metals, and a monolayer or multilayer provided on the substrate consisting of at least one member selected from the carbides, nitrides, oxides and borides of Group IVb, Vb and VIb metals of Periodic Table, solid solutions thereof and aluminum oxide, and wherein a binder phase-enriched layer is provided in a space 0.01 mm and 2 mm below the surface of the substrate with A-type and/or B-type pores inside the binder phase-enriched layer.

REFERENCES:
patent: 4318733 (1982-03-01), Ray et al.
patent: 4497874 (1985-02-01), Hale
patent: 4649084 (1987-03-01), Hale et al.

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