Surface-coated cemented carbide article and a process for the production thereof
US4150195A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1977 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Jun 15, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12576
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to surface-coated cemented carbide articles having a monolayer or multilayer consisting of one or more materials selected from oxides, carbides, nitrides and mixtures or compounds thereof, the most interior layer, in contact with the surface of the cemented carbide substrate, consisting of one or more materials selected from carbides and carbonitrides of Group IVa, Va and VIa elements, wherein the thickness of a decarburized layer (.eta. phase) present between the cemented carbide substrate and most interior coating layer is 0.5 micron or less in a case where the curvature of the interface is zero and the lattice constant of the binder metal of the coated cemented carbide article, as a mean value from the interface to 50 microns, is not more than that of the iron group metal solid solution by 0.005 A or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.