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Title:
METHOD FOR PRODUCING MIXED POWDER FOR POWDER METALLURGY, AND EQUIPMENT FOR PRODUCING MIXED POWDER FOR POWDER METALLURGY
Document Type and Number:
WIPO Patent Application WO/2018/079160
Kind Code:
A1
Abstract:
Provided are a method and equipment for producing a mixed powder for powder metallurgy, which ensure high safety and have excellent production efficiency. The method for producing a mixed powder for powder metallurgy comprises: a primary mixing/stirring step for mixing and stirring a raw material including an iron-based powder, a powder for an alloy, a binder, and an auxiliary raw material using a first mixing/stirring device provided with a heating means; a secondary mixing/stirring step for mixing and stirring the raw material after the primary mixing/stirring step using a second mixing/stirring device which is different from the first mixing/stirring device and which is provided with a cooling means; and a tertiary mixing/stirring step for mixing and stirring the raw material after the secondary mixing/stirring step using a third mixing/stirring device which is different from the first mixing/stirring device and the second mixing/stirring device, wherein the raw material is heated up to a temperature T1 higher than a melting point Tm of the binder in the primary mixing/stirring step, and the raw material is cooled down to a temperature T2 lower than Tm in the secondary mixing/stirring step.

Inventors:
SONOBE Akio (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chom, Chiyoda-ku Tokyo 11, 〒1000011, JP)
Application Number:
JP2017/034554
Publication Date:
May 03, 2018
Filing Date:
September 25, 2017
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
International Classes:
B22F1/00
Domestic Patent References:
WO2009025274A12009-02-26
Foreign References:
JPH0247201A1990-02-16
JPS5016163A1975-02-20
JPH03162502A1991-07-12
CN103394686A2013-11-20
Attorney, Agent or Firm:
SUGIMURA Kenji (36F Kasumigaseki Common Gate West, 3-2-1 Kasumigasek, Chiyoda-ku Tokyo 13, 〒1000013, JP)
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