低温焼入による鋼の材質の変化について (第2報) : 中炭素鋼の疲れ強度および衝撃強度

概要

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The investigation was carried out to improve the mechanical properties of medium carbon steel by the low-temperature quenching (LTQ) and the spheroidizing treatments. The fatigue and the impact strengths are remarkably increased by the LTQ and further more increased by spheroidizing treatments. The endurance limit and the notch impact value are improved by the LTQ about 33% and 83% respectively, and about 26% and 430% respectively by spheroidizing the carbide. The static strengh and hardness are also increased by these treatments, while the ductility is not decreased. An interpretation on the present results is offered on the metallurgical and the mechanical basis. The LTQ strengthens the ferrite itself by super-saturating the carbon in it and the spheroidizing treatment relieves the internal notch effects.
社団法人日本材料学会の論文
1956-09-15