低合金钢奥氏体连续冷却过程中组织演变的预测  

Prediction of Microstructural Evolution for Low Alloy Steels During Continuous Cooling of Austenite

作　　者：贠冰[1] 董小雷[2] 刘新忠[3] 张习加[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]河北理工大学机械工程学院,河北唐山063009 [3]北京金自天正智能控制股份有限公司过程控制部,北京100070

出　　处：《热加工工艺》2009年第14期4-7,共4页Hot Working Technology

基　　金：唐山市科技发展计划项目资助(07160202B-3);教育部高等学校实验教学示范中心建设项目(2007年)

摘　　要：以热力学理论和形核生长理论为基础,对低合金钢奥氏体在连续冷却过程中的组织演变进行了数值分析。热力学计算使用软件Thermo-Calc来完成;根据"形核长大"和"位置饱和"机制,采用Cahn的相变动力学理论和Scheil叠加原理建立了铁素体相变动力学模型;以"位置饱和"机制建立了珠光体和贝氏体的相变动力学模型。模型的预测结果与实验数据基本相符。Based on thermodynamic theory and nucleation-growth theory, numerical simulation of microstructural evolution in low alloy steels during continuous cooling of austenite was carried out. In the model, the software Thermo-Calc was used to calculate thermodynamic data. According to the mechanism of nucleation-growth and saturation in nucleation sites, the ferrite transformation model was constructed based on Cahn＇s transforming kinetics theory and Scheil＇s additivity rule. The pearlite and bainite transformation model were constructed with the mechanism of saturated nucleation sites. Calculating results agree with experimental results reasonably.

关 键 词：连续冷却 奥氏体 组织演变 预测 

分 类 号：TP391.77[自动化与计算机技术—计算机应用技术] TG151.3[自动化与计算机技术—计算机科学与技术]