Cemented carbide body with high wear resistance and extra tough behavior
US6015614A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1997 |
| Grant date | Jan 18, 2000 |
| Priority date | — |
| Expiry date | Nov 3, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/264
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is provided an Al.sub.2 O.sub.3 -TiN coated cemented carbide insert intended for turning of steels and especially Ca-treated steels. The alumina layer is protected by an extra thick and multilayered coating of TiN. The TiN coating is wet blasted and, for this purpose, (Ti,Al)(C,O,N) bonded to the underlying Al.sub.2 O.sub.3 layer which preferably consists of .alpha.-Al.sub.2 O.sub.3. The extra tough behavior together with increased wear resistance can be obtained by optimizing the TiN layer thickness, structure and adhesion and wet blasting the said TiN coating. This invention is characterized by the fact that the coating layers are not missing at the cutting edge of the insert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.