Cemented carbide body with extra tough behaviour

Details Cemented carbide body with extra tough behaviour Cemented carbide body with extra tough behaviour

B - Operations, Transporting

24

D

B24D 3/06 (2006.01) B24D 18/00 (2006.01) C22C 29/08 (2006.01) C23C 8/20 (2006.01) C23C 30/00 (2006.01) E21B 10/46 (2006.01) E21B 10/56 (2006.01)

Patent

CA 2060551

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.

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