Journal of the Japan Society of Powder and Powder Metallurgy
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
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Volume 5, Issue 3
Displaying 1-4 of 4 articles from this issue
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  • Sintered Iron-Copper Alloys for Machine Parts
    Watanabe, Fujii, Hayashi
    1958 Volume 5 Issue 3 Pages 147-158
    Published: December 20, 1958
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.5.147
    JOURNAL OPEN ACCESS
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    Our studies on the sintered iron-base alloys for machine parts are still going on. This is a report covering the properties of iron-copper sintered alloys and a discussion on several problems as follows.:
    1) Effects of the iron powder distribution on dimensional changes of sintered compacts.
    2) Effects of the copper content on the properties of the sintered compacts.
    3) On the properties of sintered compacts made by a repressing method.
    4) On the properties of sintered compacts using electrolytic or reduced iron powders
    5) On the precipitation-hardening of sintered compacts.
    6) On the gas-carburization of sintered compacts.
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  • Study on OP Magnet (1st Report)
    Influence of solid state reaction on sintering of ferrite magnet
    Hiroshi Nakamura, Noboru Kawai, Katsuya Kudaka
    1958 Volume 5 Issue 3 Pages 159-161
    Published: December 20, 1958
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.5.159
    JOURNAL OPEN ACCESS
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    Mechanism of sintering of ferrite magnet-OP magnet-is investigated. Mixed powder of several metal oxides and ferrite powder are both sintered, measured in changes of shrinkage, porosity and intensity of magnetization with sintering and compared each other. As results, sintering process of ferrite magnet takes three stages:
    (1) Reaction and sintering both proceeds rapidly.
    (2) Reaction proceeds slowly and sintering ceases.
    (3) Reaction comes to an end, but sintering proceeds again. Finally the cause of sintering process in 2nd stage is discussed and considered to be the effect of solid state reaction.
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  • Preparation of Composite Powder by Chemical Method
    Kazuhiko Ogawa, Daizo Okubo, Ko Akahori
    1958 Volume 5 Issue 3 Pages 162-166
    Published: December 20, 1958
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.5.162
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    CoC2O4.2 H2O has been precipitated by pouring ammonium oxalate solution into the Co(No3)2 solution in which very fine particles of WC are suspended. Then the mixture of carbide and cobalt oxalate after filtration, washing and drying, was reduced by hydrogen. The obtained mixed powder of carbide and cobalt was pressed at room temperature and sintered in hydrogen. The mechanical properties of the alloys of carbide and cobalt by this process were comparable to those of the alloys of carbide and cobalt by ball-milling process.
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  • [title in Japanese]
    [in Japanese]
    1958 Volume 5 Issue 3 Pages 167-169
    Published: December 20, 1958
    Released on J-STAGE: May 22, 2009
    DOIhttps://doi.org/10.2497/jjspm.5.167
    JOURNAL OPEN ACCESS
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