熱延鋼板の変態集合組織とその予測計算

概要

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Crystallographic textures of hot-rolled steel sheets are thought to be inherited from the textures of austenite, which develop during hot rolling, due to the orientation relationship between austenite and product phases and the therein-involved variant selection rules. However, despite numerous investigations, there is still difficulty in the prediction of textures of ferrite or martensite in the hot-rolled steels. In this article are described the present state of such prediction of transformation textures in hot-rolled steel sheets. In particular, the way to calculate the transformation textures based on the so-called MODF method and a variant selection rule that has been recently proposed are described in detail. Combined with the proposed variant selection rule, the MODF method may be capable of quantitatively predicting the transformation texture in hot-rolled steel sheets.