変態誘起塑性を示す冷延鋼板における残留オーステナイトの加工安定性

概要

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Mechanical properties of cold-rolled and continuously annealed TRIP steel with 0.14%C-1.9%Si-1.7%Mn have been discussed especially from the aspect of the plastic stability of retained austenite which was varied by changing austemper time at 400℃. The results obtained are as follows ; The plastic stability of retained austenite and the strength-ductility balance at room temperature are improved with the increase in C content in retained austenite after optimizing the austemper time in the continuous annealing process. Martensitic tranformation is considered to occur from the plastically unstable retained austenite with low C content. The kinetics model for deformation-induced martensitic transformation explains the experimentally obtained change in volume% of retained austenite with plastic strain in terms of the C content in retained austenite.
社団法人日本鉄鋼協会の論文
1995-06-01