Iron-based mixed powder for powder metallurgy and iron-based sintered compact
US6648941B2 · kind B2 · utility
2Cited by
8References
20Claims
0Family size
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Key dates
| Filing date | Feb 21, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Feb 21, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In order to improve machinability of a sintered compact, a phosphate compound of an alkali earth metal (calcium phosphate compound or the like) is mixed with an iron-based powder, or an alkali earth metal fluoride (calcium fluoride, or the like) is further mixed with the iron-based powder. Alternatively, the alkali earth metal fluoride, together with a graphite powder, is preferably fixed to recesses of the iron-based powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.