Hard coating film for cutting tools
US9855608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2014 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Aug 27, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23B2224/24
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is a hard coating film formed on a hard base material such as cemented carbide. The hard coating film has a nanoscale multilayered structure to have improved oxidation resistance and wear resistance. The hard coating film is a hard coating film formed on the base material. The first layer is composed of a TiAl nitride having a composition of Ti1-aAla (0.3≦a≦0.7), and the second layer has a nanoscale multilayered structure or a structure in which the nanoscale multilayered structure is repeatedly laminated at least two times, the nanoscale multilayered structure including a thin layer A composed of an AlTiSi nitride, a thin layer B, a thin layer C composed of a AlCr nitride, and a thin layer D having thicknesses of 3 nm to 20 nm. The thin film B and the thin film D are composed of a TiAl nitride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.