Surface-coated cutting tool having therein hard coating layer capable of exhibiting excellent chipping resistance during high-speed intermittent cutting work
US9452478B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2013 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Mar 21, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A surface-coated cutting tool includes a body and a hard coating layer coating the cutting tool body. In the surface-coated cutting tool, the (Ti1-XAlX)(CYN1-Y) layer with a cubic crystal structure (X and Y are atomic ratio, and satisfy 0.60≦X≦0.90 and 0.0005≦Y≦0.005, respectively) is vapor-deposited on the body by a chemical vapor deposition method. The Al content XL is 0.55≦XL≦0.70, and the grain size DL is 0.1 μm or less in the (Ti1-XAlX)(CYN1-Y) layer near the interface between the body and the complex carbonitride layer. The Al content XH 0.80≦XH≦0.95 and the average grain size DH is 0.5 μm to 2 μm in the (Ti1-XAlX)(CYN1-Y) layer near the outer surface side. Furthermore, the Al content ratio and the grain size in the (Ti1-XAlX)(CYN1-Y) layer gradually increase to the outer surface side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.