Stratified protecting coating for wearing pieces and hard metal cutting tools
US4237184A · kind A · utility
57Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Jun 15, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to a hard metal wearing piece, especially for tools, which is covered at least on the places subjected to wear with stratified protecting coating. This stratified protecting coating comprises at least five superimposed layers, at least two of them being of different compositions; furthermore, the internal layer in contact with the substrate is a layer of carbide, the external layer is a layer of boride or carbide, and the intermediary layers are of carbide, nitride, oxide, boride, and/or of mixed compounds thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.