Functionally graded cemented tungsten carbide with engineered hard surface and the method for making the same
US8936750B2 · kind B2 · utility
1Cited by
24References
14Claims
0Family size
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Key dates
| Filing date | Nov 19, 2009 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Feb 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2207/05
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of preparing a functionally graded cemented tungsten carbide material via heat treating a sintered cemented tungsten carbide is disclosed and described. The heat treating process comprises at least a step that heats the sintered material to the multi-phase non-equilibrium temperature range in which multiple phases including solid tungsten carbide, liquid metal binder, and solid metal binder coexist. Additionally, the material, after the heat treating process comprises a surface layer with lower metal binder content than the nominal value of metal binder content of the bulk of the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.