Cemented carbide with improved toughness
US10597758B2 · kind B2 · utility
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Key dates
| Filing date | Nov 10, 2015 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Jun 10, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C29/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cemented carbide comprises particles including a tungsten carbide (WC) as a main component; a binder phase including cobalt (Co) as a main component; and particles including a carbide or a carbonitride of at least one selected from the group consisting of Group 4a, 5a, and 6a elements, or a solid solution thereof, wherein a cubic phase free layer (CFL), in which the carbide or the carbonitride is not formed, is formed from a surface of the cemented carbide to a depth of 5 μm to 50 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.