MATHEMATICAL MODELLING OF PHASE TRANSFORMATION FROM HOT-DEFORMED AUSTENITE IN LOW CARBON STEELS  

作　　者：Y.B.Xu G.D.Wang X.H.Liu 

机构地区：[1]State Key Laboratory of Rolling And Automation,Northeastern University, Shenyang 110004, China,State Key Laboratory of Rolling And Automation,Northeastern University, Shenyang 110004, China,State Key Laboratory of Rolling And Automation,Northeastern University, Shenyang 110004, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2003年第3期204-210,共7页金属学报（英文版）

基　　金：National Key Basic Research and Development Programme of China(No.G199806150).

摘　　要：On the basis of superelement model, Cahn’s transformation kinetics theory and Scheil’s additivity rule, the CCT diagrams and transformation kinetics in low carbon steel were predicted considering both undeformed and deformed conditions. The influence of deformation on phase equilibria and transformation incubation period was evaluated quantitatively. The recrystallization kinetics and the evolution of dislocation density were calculated during continuous cooling. The results show deformation considerably shortens transformation incubation period, accelerates transformation kinetics and makes CCT curve shift leftwards. The calculated CCT diagrams and the volume fraction of each phase are in good agreement with measurements.On the basis of superelement model, Cahn's transformation kinetics theory and Scheil's additivity rule, the CCT diagrams and transformation kinetics in low carbon steel were predicted considering both undeformed and deformed conditions. The influence of deformation on phase equilibria and transformation incubation period was evaluated quantitatively. The recrystallization kinetics and the evolution of dislocation density were calculated during continuous cooling. The results show deformation considerably shortens transformation incubation period, accelerates transformation kinetics and makes CCT curve shift leftwards. The calculated CCT diagrams and the volume fraction of each phase are in good agreement with measurements.

关 键 词：THERMODYNAMICS transformation kinetics continuous cooling hot-deformed austenite 

分 类 号：TG142[一般工业技术—材料科学与工程]