鋼の階段燒入に關する研究 (III) : オーステンパリング的階段燒入及び短時間加熱階段燒入を行つた炭素鋼の組織分布, 硬度分布及び殘留應力分布

概要

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Two sorts of stepped quenching are studied. The first is an austempering-ike quenching, that is before quenching in water, the sample is dipped in a 300℃ salt bath for a little while. The second is characterized by the short time heating beyond A_3 point just before queuching. Hardness distribution curves reveal some interesting results which conform with structural aspects. Residual stress curves show that the thermal and the transformational stress can be superposed in various ways according to the time of heating beyond A_3, or the time of dipping in a 300℃ salt bath.
1949-02-25