Fe-Al-Mo合金の磁性におよぼす熱処理の影響

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タイトル別名
  • Effect of Heat Treatment on Magnetic Properties of Fe-Al-Mo Alloys
  • Fe-Al-Mo ゴウキン ノ ジセイ ニ オヨボス ネツ ショリ ノ エイキョウ

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The effect of molybdenum on the Fe3Al-FeAl phase transformation of Fe-Al alloys was studied by means of electrical resistivity measurement at high temperatures, and magnetic properties of the alloys under the various heat treatments were compared with the transformation process.<BR>The results obtained are as follows:<BR>(1) The transformation temperature from Fe3Al to FeAl phase increases at a rate of 17°∼18°C per molybdenum percent.<BR>(2) The temperature coefficient of resistivity is negative at the FeAl phase, and its absolute value increases with increasing molybdenum content.<BR>(3) The FeAl phase quenched in water sharply changes to the Fe3Al phase at a temperature around 250°C independent of the molybdenum content, and then the magnetic properties decrease.<BR>(4) The FeAl phase increases with temperature in 400°C-transformation temperature regions in which both FeAl and Fe3Al phases exist, so that the magnetic properties increase with temperature. The best is obtained in water-quenching from temperature above the transformation in case of 0% molybdenum, but from temperature about 50°C below it in case of 3∼4%. More than 80% of the maximum value are obtained in water-quenching between 500° and 600°C.<BR>(5) The magnetic properties remarkably decrease due to the formation of the Fe3Al phase at a quenching temperature below 400°C in case of 0% molybdenum, but slightly decrease in case of 2∼4%. This is believed to depent on the change of magnetic anisotropy and magnetostriction with molybdenum.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 28 (8), 461-464, 1964

    公益社団法人 日本金属学会

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