高温圧延されたアルフェル合金の低温焼入

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  • Study on Hot-Rolled “Alfer” Sheets Subzero-Quenched in Liquid Nitrogen
  • コウオン アツエン サレタ アルフェル ゴウキン ノ テイオン ヤキイレ
  • Study on Hot-Rolled “Alfer” Sheets Subzero-Quenched in Liquid Nitrogen

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Hot-rolled “Alfer” sheets containing 12.29 per cent of aluminum were heated for one hour at some temperatures from 300°C to 1200°C, then quenched in liquid nitrogen from the heating temperature, and the magnetostriction, the Young’s modulus and the saturation magnetization were measured. In general, the saturation magnetostriction decreased almost linearly to a minimum at 500°C with rise of quenching temperature from 300°C to 500°C, then increased slowly with rise of quenching temperature. On the contrary, the Young’s modulus generally increased to a maximum at 500°C with rise of quenching temperature, then decreased abruptly, and showed again the tendency of slight increase above 800°C, although there was a minimum at 450°C at 0° or 90° to the roll direction. The saturation magnetization decreased to a minimum at 450°C, but increased abruptly at 500°C, then showed the tendency of slightly increasing until the quenching temperature at 800°C, and decreased again at 1000°C. From the results obtained, it may be inferred that the effect of thermal stress caused by the above subzero quenching is largest at 500°C, and becomes smaller at the temperatures above or under 500°C.

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