Process for manufacture of powder compact feed materials for fine grained hardmetal
US6113668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1997 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The manufacture of powdered feed materials for hard fine grained metal body production includes the reduction of metal oxides into powdered metal and the subsequent carburization into metal carbide. Processes currently used are very cost intensive, mainly because of very long reaction times at high temperatures. According to applicant's economical process, the above reactions occur in the range of seconds and in a high-temperature cyclone as the reaction chamber. The apparatus is rather simple to construct. The stock to undergo reaction is continuously introduced into the chamber as a solid powdered phase with reaction gas and/or carrier gas, and passes through the chamber on predetermined paths for reaction, without leaving the solid state thereby.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.