MANUFACTURE OF FERROUS POWDER MIXED MATERIAL FOR POWDER METALLURGY

PURPOSE:To obtain product having excellent fluidity and less segregation and dusty characteristic by uniformly mixing powder for alloy, additive for improving cuttability, zinc stearate and/or wax, etc., together with ferrous powder with stirring wings and further heating, etc. CONSTITUTION:The powd...

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Bibliographic Details
Main Authors SAKURADA KAZUO, TAKAGI SHIGEAKI, OKABE RITSUO
Format Patent
LanguageEnglish
Published 16.02.1990
Subjects
CASTING
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
WORKING METALLIC POWDER
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Summary:PURPOSE:To obtain product having excellent fluidity and less segregation and dusty characteristic by uniformly mixing powder for alloy, additive for improving cuttability, zinc stearate and/or wax, etc., together with ferrous powder with stirring wings and further heating, etc. CONSTITUTION:The powder for alloy and the additive for improving cuttability, etc., and the zinc stearate and/or the wax are prepared. These are primarily mixed with the stirring wings together with the ferrous powder at 2-10m/sec circumferential speed. Successively, binder is added and secondarily mixed. During mixing or after mixing these, the temp. of the mixed powder is raised at 90-150 deg.C to manufacture co-melting combined agent of the binder and the zinc stearate and/or wax. Successively, while executing tertiary mixture at 2-5m/sec circumferential speed, these are cooled to <=85 deg.C. Then, the above powder for alloy and the additive for improving cuttability are fixed on the surface of the ferrous powder particles with the above co-melting combined agent.
Bibliography:Application Number: JP19880197579