Method for mixing raw material powder for powder metallurgy and method for producing raw material powder for powder metallurgy

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 po...

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Bibliographic Details
Main Authors SAKURADA ICHIO, MAEDA YOSHIAKI, OGURA KUNIAKI, OKAWA KOTARO, MAKINO KIYOSHI, OZAKI YUKIKO
Format Patent
LanguageEnglish
Published 18.08.2015
Subjects
ALLOYS
CASTING
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
POWDER METALLURGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary: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.
Bibliography:Application Number: US20080452857