Coated hard alloy blade member

Details Coated hard alloy blade member Coated hard alloy blade member

1998-12-14

2000-07-25

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428469, 428697, 428698, 428699, 428701, 428702, C23C 3000

Patent

active

060934794

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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