热轧带钢冷却过程γ→α相变温度A_(r3)的计算  

Calculation on the γ→α transformation temperature A_(r3) of hot rolled strip during the cooling process

作　　者：刘云飞[1] 彭艳[1] 刘宏民[1] 马博[2] 

机构地区：[1]燕山大学轧制设备及成套技术教育部工程研究中心,秦皇岛066004 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004

出　　处：《塑性工程学报》2010年第4期140-143,共4页Journal of Plasticity Engineering

基　　金：霍英东教育基金会高等院校青年教师基金资助项目(101048);河北省自然科学基金资助项目(E2008000835)

摘　　要：基于相变热力学和相变动力学原理,考虑变形对铁素体相变孕育期的影响,并根据Scheil叠加原理和热膨胀实验结果,理论与实验相结合,在C语言环境下编译了热变形条件下铁素体相变实际温度计算模型,分析了变形和冷却速度对铁素体相变温度的影响。用该方法进行的计算机模拟结果与实验结果比较,两者吻合良好,表明该模型能够准确计算热轧带钢冷却过程中铁素体实际相变温度,为组织性能预报提供理论依据。Based on the principles of transformation kinetics and thermodynamics,considered the effects of deformation on the ferrite phase incubation period,according to the Scheil＇s additive principle and the dilatometric experimental data,a new model for the ferrite transformation starting temperature had been developed under C＋＋ with the influence of deformation and cooling rate being analyzed.The results given by the model has good agreements with the measured value.It shows that the model can have a good accuracy in predicting the starting temperature of ferrite transformation for hot rolled strip during the cooling process,and provide theoretical basis for predicting the evolution of microstructure and properties for hot rolled strip.

关 键 词：热变形 相变孕育期 冷却速度 相变温度 铁素体 

分 类 号：TG335.56[金属学及工艺—金属压力加工]