高速連続熱間加工における炭素鋼オーステナイト組織の変化(熱間加工と再結晶)(<特集>再結晶・粒成長)

概要

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In this investigation, the recrystallization behaviour of austenite of carbon steels due to hot working has been studied. To investigate the change of structure of austenite during hot rolling of strip, a newly developed testing machine which enables simulations of hot rolling of plate, strip and wire rod has been used. The results of the experiments have been evaluated to make a calculation model of grain size and fraction recrystalized. The feature of this calculation model is that the effect of prior working on the recrystallization behaviour at next deformation can be quantitatively taken into consideration by means of dislocation density of material. The accuracy of the model has been examined by experiments of single pass rolling in laboratory and by wire rod rolling in practice. A reasonable agreement is obtained in most cases. The model is used to estimate the influence of rolling temperature, speed of strip, initial grain size, and schedule of reduction on the grain size after final rolling of hot strip.
社団法人日本鉄鋼協会の論文
1984-11-01