Coated hard alloy blade member

Details Coated hard alloy blade member Coated hard alloy blade member

1995-03-06

1999-07-06

Gorgos, Kathryn

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428698, 427249, 4272557, B22F 300

Patent

active

059207604

ABSTRACT:
A coated hard alloy blade member is disclosed which includes a substrate formed of a hard alloy of a WC-based cemented carbide or a TiCN-based cermet, and a hard coating deposited on the substrate. The hard coating includes an inner layer of TiCN having unilaterally grown crystals of an elongated shape and an outer layer of Al.sub.2 O.sub.3 having a crystal form .kappa. or .kappa.+.alpha. wherein .kappa.>.alpha.. The resulting blade member is highly resistant to wear and fracturing, and possesses cutting ability of a higher level.

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