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| SOME EXPERIMENTS ON THE DISPERSION-STRENGTHENING AUSTENITIC HEAT-RESISTING STEEL |
| LIU MIN-CHIH;PAI FU-SHAN Institute of Metal Research;Academia Sinica |
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Cite this article:
LIU MIN-CHIH;PAI FU-SHAN Institute of Metal Research;Academia Sinica. SOME EXPERIMENTS ON THE DISPERSION-STRENGTHENING AUSTENITIC HEAT-RESISTING STEEL. Acta Metall Sin, 1963, 6(1): 59-64.
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Abstract The dispersion-strengthening phenomenon in an austenitic heat-resisting steel(ЭИ257)has been studied.The specimens are composed of powder ЭИ 257,blended with Al_2O_3,MgO,ThO_2,ZrO_2,or Nb_2O_5.The changes in hardness,at room or high temperatures,of the speci-mens with various compositions,show that the dispersion-strengthening effect in the steelis quite remarkable.The experiments gave the following results:(1)When a heat-resisting steel(ЭИ 257)is dispersion-strengthened with oxidepowder,its heat-resisting temperature for comparable hot hardness may be increasedfrom 650℃ to 900℃.(2)Al_2O_3 is the best among the five oxides,and 8—10 volume percent Al_2O_3 isthe best of all.(3)Dispersed oxide raises the recrystallization temperature.
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Received: 18 January 1963
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