Invention Application
- Patent Title: HIGH HARDNESS/HIGH COMPRESSIVE STRESS MULTILAYER COATED TOOL
- Patent Title (中): 高硬度/高压应力多层涂层工具
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Application No.: PCT/US1990001986Application Date: 1990-04-12
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Publication No.: WO1990013422A1Publication Date: 1990-11-15
- Inventor: KENNAMETAL INC. , QUINTO, Dennis, T. , KAUFMANN, Helmut, Josef
- Applicant: KENNAMETAL INC.
- Assignee: KENNAMETAL INC.
- Current Assignee: KENNAMETAL INC.
- Priority: US348,241 19890505
- Main IPC: B32B18/00
- IPC: B32B18/00
Abstract:
A cutting tool is provided composed of a hard substrate having a PVD coating thereon having three layers. The innermost of first layer (1) is composed of a group IVB (titanium, hafnium or zirconium) metal alloy. The middle or second layer (2 and 3) is composed of a group IVB carbonitride. The outermost or third layer (4) 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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