Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1989-05-05
1991-12-24
Robinson, Ellis P.
Stock material or miscellaneous articles
Composite
Of inorganic material
51295, 51307, 51309, 428212, 428334, 428469, 428472, 428688, 428689, 428699, 428704, B32B 1504, C23C 2804, C23C 1630
Patent
active
050751816
ABSTRACT:
A cutting tool is provided composed of a hard substrate having a PVD coating thereon having three layers. The innermost or first layer is composed of a group IVB (titanium, hafnium or zirconium) metal nitride. The middle or second layer is composed of a group IVB carbonitride. The outermost or third layer is also composed of a group IVB metal nitride. The PVD coating is characterized by high hardness and high residual compressive stresses.
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Kaufmann Helmut J.
Quinto Dennis T.
Balzers Limited
Kennametal Inc.
Prizzi John J.
Robinson Ellis P.
Turner Archene
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