模拟层流冷却方式对厚板微观组织和性能的影响  

Modeling the Effect of Laminar Cooling Pattern on Microstructure and Mechanical Properties of Plates in Rolling Process

作　　者：谭文[1] 吴迪[1] 薛文颖[1] 刘振宇[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2007年第5期664-667,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50474086);教育部"新世纪优秀人才"支持计划项目(NECT-04-0278)

摘　　要：为了研究层流冷却方式对中厚板组织和性能的影响,用耦合有限差分和微观组织演变模型模拟计算了中厚板层流冷却过程中的温度和组织变化,预测出了不同冷却方式下的铁素体晶粒尺寸和相组成.在此基础上,利用组织-性能关系模型对产品的屈服强度、抗拉强度进行了预报,并进行了实验验证.模拟结果和轧制实验表明,对于低碳中厚板,层流冷却方式对最终相组成的影响较小,而对产品的铁素体晶粒尺寸有较大的影响.两段冷却方式能获得较好的组织和力学性能.To investigate the effect of different laminar cooling patterns on the microstructure and mechanical properties of plates in rolling process, the changes in temperature and microstructure of plate in such cooling process were calculated simulatively by coupling finite difference method with microstructural evolution models, thus predicting the ferrite grain size and phase composition under different cooling patterns. In addition, the yield/tensile strength were also predicted through the structure-property models and verified by tests. Simulation and rolling test results showed that the effect of laminar cooling patterns on the plate products is small in final phase composition but great in ferrite grain size. A two-stage cooling pattern was proved all the better for both plate＇s structure and mechanical properties.

关 键 词：中厚板 层流冷却 模拟 微观组织 

分 类 号：TG335.5[金属学及工艺—金属压力加工]