Method for mixing raw material powder for powder metallurgy and method for producing raw material powder for powder metallurgy
US9108246B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2008 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Jun 10, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F1/142
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method for mixing a raw material powder for powder metallurgy that allows efficient mixing at a low cost with a simple measure and easy adjustment of the apparent density by performing first agitation mixing in which a powder mixture obtained by adding, to an iron powder, one or two or more members selected from lubricant powders, free-machining agent powders, and lubricant powders for sliding surface, an alloying powder, and a binding agent is agitated while increasing the temperature to a temperature TK equal to or higher than the melting point TM of the binding agent, the resultant is agitated while maintaining the temperature TK, and the resultant is further agitated while reducing the temperature from the temperature TK, and performing second agitation mixing in which the obtained powder mixture is agitated while cooling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.