EFFECT OF SILICON ADDITION ON RECRYSTALLIZATION AND PHASE TRANSFORMATION BEHAVIOR OF HIGH-STRENGTH HOT-ROLLED TRIP STEEL
来源期刊：Acta Metallurgica Sinica2008年第3期
论文作者：X.M.Zhao L.J.Zhu D.Wu
Key words：TRIP steel; Recrystallization; Ferrite transformation; Bainite transformation; Silicon;
Abstract: Because Si is a noncarbide forming element, a multiphase microstructure consist ing of ferrite, bainite, and retained austenite, at room temperature, can be formed by controlling the thermomechanical process strictly. The cooling schedules must be restricted by the formation of pearlite and cementite. In the present article, a new integrated mathematical model for prediction of microstructure evolution during controlled rolling and controlled cooling is developed for a typical kind of low carbon Si-Mn TRIP steel, which consists of temperature simulation, recrystallization, and transformation models. The influence of Si contents has been thoroughly investigated. The calculated results indicate that Si retards recrystallization, restrains austenite grain growth as well as accelerates polygonal ferrite transformation.
X.M.Zhao1，L.J.Zhu2，D.Wu1
(1.The State Key Laboratory of Rolling Technology and Automation, Northeastern University, Shenyang 110004, China;
2.College of Materials Science and Engineering, Jilin University, Changchun 130025, China)
Abstract:Because Si is a noncarbide forming element, a multiphase microstructure consist ing of ferrite, bainite, and retained austenite, at room temperature, can be formed by controlling the thermomechanical process strictly. The cooling schedules must be restricted by the formation of pearlite and cementite. In the present article, a new integrated mathematical model for prediction of microstructure evolution during controlled rolling and controlled cooling is developed for a typical kind of low carbon Si-Mn TRIP steel, which consists of temperature simulation, recrystallization, and transformation models. The influence of Si contents has been thoroughly investigated. The calculated results indicate that Si retards recrystallization, restrains austenite grain growth as well as accelerates polygonal ferrite transformation.
Key words:TRIP steel; Recrystallization; Ferrite transformation; Bainite transformation; Silicon;
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