52.5Fe-11Al-18Ni-12.5Co-6Cu焼結磁石の焼結後の冷却法並びに磁性について

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  • On the Cooling Procedure After Sintering and the Magnetic Properties of 52.5Fe-11Al-18Ni-12.5Co-6Cu Sintered Magnet. (Study on Sintered Fe-Al-Ni System Magnet. (4))
  • 52.5Fe-11Al-18Ni-12.5Co-6Cu ショウケツ ジシャク ノ ショウケツ ゴ ノ レイキャクホウ ナラビニ ジセイ ニ ツイテ

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抄録

The relatinoship between the cooling procedure after sintering and the magnetic properties, the hardness, the microstructure of Fe-Al-Ni-Co-Cu sintered magnets was studied. The specimens at their sintering temperature (1350°) were put into a cooling box kept at various temperatures. The experimental results obtained are summarized as follows: (1) A remarkable effect of cooling rate after sintering upon the magnetic properties of the specimens has been found. Excellent magnetic properties could be obtained under the average cooling rate of 1.5∼2.0°C/sec between 900° and 500°, but inferior magnetic properties were obtained under either faster or slower cooling rate. (2) No change of microstructure of the specimens under the various cooling rates has been observed. (3) Excellent magnetic properties could be obtained under the following optimum conditions: i.e.sintering at 1350° for 3∼6 hours in extra-pure hydrogen, and quenching cooling box retained at 700°.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (6), 318-321, 1959

    公益社団法人 日本金属学会

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