Cemented carbide body with extra tough behavior

Details Cemented carbide body with extra tough behavior Cemented carbide body with extra tough behavior

1993-09-22

1995-09-26

Derrington, James

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 11, 419 15, 419 18, 419 38, B22F 312

Patent

active

054532418

ABSTRACT:
The present invention relates to cemented carbide bodies preferably for rock drilling and mineral cutting. Due to the fact that the bodies are built up of a core of eta-phase-containing cemented carbide surrounded by a surface zone free of eta-phase with low Co-content in the surface zone and successively increasing Co-content to a maximum in the outer part of the eta-phase-core they have obtained an increase in toughness and life at practical use.

REFERENCES:
patent: 3660050 (1972-05-01), Iler
patent: 4743515 (1988-05-01), Fischer

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