Method of making cemented carbide or cermet agglomerated powder mixtures
US7737217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2007 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | May 25, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a method of making a ready-to-press agglomerated powder mixture by wet milling a powder mixture containing binder and spray drying said slurry to an agglomerated powder useful for making cutting tools for metal machining, tools for rock drilling and wear parts. If the binder is a baroplastic polymer having a pressure induced transformation from hard to soft well developed agglomerates with good flow properties and good plasticity are obtained. The hard property of the binder is used at normal pressures, during handling of the spray-dried powder and in the green body, whereas the softer properties are used at higher pressures during the pressing of the material when the pressure exceeds from about 10 to about 50 MPa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.