抄録
After investigation of the effects of hot-working conditions on recrystallization behavior and mechanical properties of S40C, SCM 435, SCM 420 and SCM 420+Nb steels the following results were obtained.
(1) Recrystallizations during hot-working occurred in the order of easiness S40C, SCM 435, SCM 420 and SCM 420+Nb steels.
(2) The value of reduction in area in the tension test can be improved by hot-working the austenite with fine grains at temperature of 750 to 800°C in steels but S40C.
(3) The result of (2) was discussed in terms of the effects of hot-working on the cooling transformation of the steels.
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