Coated cutting tool for general turning in heat resistant super alloys (HRSA)
US8034438B2 · kind B2 · utility
8Cited by
8References
9Claims
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Key dates
| Filing date | Aug 21, 2008 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Aug 20, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to coated cemented carbide inserts, particularly useful in general turning of superalloys. The inserts are characterized by a cemented carbide of WC, about 5.0-7.0 wt-% Co, and about 0.22-0.43 wt-% Cr, where the substrate has a coercivity (Hc) of about 19-28 kA/m. The coating contains a single (TixAl1-x)N-layer, where x is about 0.25-0.50, with crystal structure of NaCl type, total thickness of about 3.0-5.0 μm, (200)-texture, and compressive residual strain of about 2.5×10−3-5.0×10−3, optionally containing an outermost TiN-layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.