窒素中における20%Cr-Fe合金の窒素吸収におよぼす各種因子の影響について

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タイトル別名
  • On the Effects of Various Factors on the Nitrogen-Absorption of the 20%Cr-Fe Alloy in Nitrogen
  • チッソ チュウ ニ オケル 20 Cr-Fe ゴウキン ノ チッソ キュウシュウ ニ オヨボス カクシュ インシ ノ エイキョウ ニ ツイテ

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抄録

The effects of heating time, heating temperature, the surface condition of specimens and the purity of the gas employed on the high temperature nitrogen-absorption of the 20%Cr-Fe alloy containing 0.1% carbon and 0.2% nitrogen in extremely pure nitrogen atmosphere were studied. The results obtained were as follows: (1) More nitrogen was absorbed as the heating was longer. The rate of absorption, however, was reduced gradually as the heating time was more prolonged. (2) Nitrogen was absorbed most readily when the alloy was heated at temperatures of 1100∼1150°C at which it contained most of austenite. (3) The oxide film preformed on the alloy surface appreciably inhibited the nitrogen-absorption of the alloy, whilst the effect due to the presence of oil on the surface was not so marked. The roughness of the alloy surface had some effect on the nitrogen-absorption of the alloy, and the rougher the surface, the greater the rate at which nitrogen was absorbed. (4) When unpurified gas was employed, the rate of nitrogen-absorption of alloy was more or less retarded. The effect of unpurified gas was more pronounced at relatively lower temperatures.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (9), 573-577, 1960

    公益社団法人 日本金属学会

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