热轧带钢组织性能预报模型及应用  

Prediction model for microstructures and properties on hot strip rolling

作　　者：王蕾[1] 唐荻[1] 宋勇[1] 

机构地区：[1]北京科技大学工程技术研究院,北京100083

出　　处：《钢铁》2016年第11期73-78,共6页Iron and Steel

基　　金：中央高校基本科研业务费专项资金资助项目(FRC-IC-14-005)

摘　　要：基于物理冶金理论,研究了热轧带钢过程中的奥氏体晶粒长大模型、奥氏体再结晶模型、奥氏体相变模型以及力学性能模型。奥氏体再结晶模型中,通过研究位错密度的变化来描述由于再结晶不完全造成的变形抗力的变化。奥氏体相变模型中,通过碳扩散理论描述了奥氏体-铁素体相界面随冷却过程的变化规律。基于热轧带钢过程中的冶金物理模型,开发热轧带钢组织性能预报系统。系统包括4个模块,分别用于计算板坯在加热炉、粗轧精轧、层流冷却和卷取完成各阶段的组织和力学性能参数,生产工艺是该系统的重要输入参数。利用该系统对某钢厂实际生产过程的组织性能进行预报,预报的力学性能和现场实测值有较好的一致性。Based on physical metallurgy theory, the models for austenite grain growth, austenite recrystallization, austenite transformation and machanical properties were studied. In the model of austenite recrystallization, the effect of retained strain on deformation resistance was described by the variation of dislocation density. The kinetics of austenite transformation was described with the kinetics of austenite-ferrite interface migration on the basis of carbon diffusion theory. A prediction system for microstructures and properties was developed based on the metallurgical physics models.The system included four modules to calculate the parameters of microstructures and properties in furnace, rough rolling,finish rolling, laminar cooling and after coiling, respectively. Manufacturing processes were improtant as the input parameters for the system. The system calculation was based on the actual production datas from one steel mill. A good agreement was reached between the predicted and measured values of mechanical properties.

关 键 词：热轧带钢 组织性能预报 数学模型 系统开发 

分 类 号：TG335.56[金属学及工艺—金属压力加工]