Abstract
The isothermal recrystallization behavior of 17% Cr stainless steel at the temperature range from 900 to 1250°C was investigated with a plain compression type hot deformation simulator. Special emphasis was put on the effects of α_??_γ partial transformation on recrystallization, which were studied by varying the amount of γ phase prior to deformation. In the partial transformation region, the effects of transformation on recrystallization were markedly large. When specimens were cooled down from the a single phase region to the α+γ phase region, recrystallization was suppressed by the strain enhanced transformation of α→γ. When specimens were cooled down from the α+γ phase region to the α+carbides phase region, recrystallization was suppressed by the strain enhanced decomposition of γ phase. From the above results, the suppression of recrystallization was attributed to the depletion of recrystallization nucleation sites by the strain enhanced partial transformation.
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