발간논문

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Vol.31, No.2, 208 ~ 216, 1993
Title
Effect of the Conditions of Thermomechanical Treatment on the Reverse Transformation Behaviour from Martensite to Austenite in the Metastable Austenitic Fe - Cr - Ni Steels
이영국Young Kook Lee, 권오준Oh Joon Kwon
Abstract
Experiments were performed to investigate the effect of the thermomechanical treatment on the reverse transformation from martensite (α`) to austenite(γ). The mechanism of austenite reversion was changed from the diffusional transformation to the shear transformation with increase of the heating rate in Fe-14.5% Cr-8.7% Ni alloy. The reversion temperature was decreased with decrease of the heating rate and with increase of the amount of cold reduction in the diffusionally reverted steels. However, temperatures were not affected by these parameters in the shear transformed steels. Fine grained austenite was obtained by the reversion treatment of Fe-14.5%Cr-8.7% Ni alloy which had about 25% athermal martensite in the as-hot rolled condition. This was attributed to the fact that the Ms temperature was lowered by refining the reverted austenite grain size.
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