Multilayered PVD coated cutting tool
US6333099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1998 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Dec 8, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is disclosed a cutting tool comprising a body of a sintered cemented carbide or cermet, ceramic or high speed steel on which at least on the functioning parts of the surface of the body, a thin, adherent, hard and wear resistant coating is applied. The coating comprises a laminar structure of refractory compounds in a polycrystalline, repetitive form, (MLX/Al.sub.2 O.sub.3)/(MLX/Al.sub.2 O.sub.3)/(MLX/Al.sub.2 O.sub.3)/(MLX/Al.sub.2 O.sub.3)/ . . . , where the alternating sublayers consist of metal nitrides (or carbides) and crystalline alumina of the alpha (.alpha.)- and/or the gamma (.gamma.) phase, preferably of metal nitrides and crystalline alumina of the gamma phase, and in said coating the sequence of individual layer thicknesses has no repeat period but is essentially aperiodic throughout the entire multilayered structure. The metal elements in the layers MLX are selected from Ti, Nb, Hf, V, Ta, Mo, Zr, Cr, W, Al and mixtures thereof. The total thickness of said multilayered coating is between 0.5 and 20 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.