Iron-based mixed powder for powder metallurgy and iron-based sintered compact
AssigneeKawasaki Steel Corporation
InventorsSatoshi Uenosono, Junichi Ohta, Akio Sonobe
Life of this patent
Estimating the term…
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.
Claims20
An iron-based mixed powder for powder metallurgy comprising an iron-based powder, an alloying powder, a machinability improving powder containing a phosphate compound of an alkali earth metal, and a lubricant.
An iron-based mixed powder for powder metallurgy comprising an iron-based powder, an alloying powder containing graphite powder, a machinability improving powder, a binder, and a lubricant, wherein the machinability improving powder contains an alkali earth metal fluoride powder, and the graphite powder and the alkali earth metal fluoride powder are mainly fixed to concave portions of surfaces of the iron-based powder with the binder.
Dependencies are inferred from the claim text.