大棒材轧后控制冷却和组织预测的尺寸效应研究  

Research on Size Effect in Controlled Cooling and Microstructure Prediction for Large-scale Steel Rod After Rolling

作　　者：王巍[1] 燕猛 刘文文[2] 安子军[1] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]燕山大学国家冷轧板带装备及工艺技术工程研究中心,河北秦皇岛066004

出　　处：《热加工工艺》2014年第15期103-106,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51005197)

摘　　要：针对大棒材轧后冷却工艺中的尺寸效应问题，建立了42CrMo不同直径（φ25-φ150mm）棒材轧后冷却过程温度一组织耦合非线性有限元模型。通过数值模拟，对比分析了空冷、风冷、雾冷和水冷条件下，棒材直径对工件内部温度场、温降速率和组织分布均匀性的影响规律，研究了大棒材轧后控冷工艺的尺寸效应，并通过冷却实验验证了数值模型的正确性，这能为线棒材轧后控冷工艺制定与优化提供重要依据。Aiming at the size effect in cooling process after rolling for large scale steel rod, a nonlinear finite element model coupled with thermal and microstructure of cooling process for steel rods with diameters of φ25-φ150 mm was established. By nmnerical simulation, the influence law of rod diameter on the uniformity of temperature field, temperature drop rate and microstructure distribution was contrastively analyzed under four cooling conditions including air cooling, wind cooling, flog cooling and water cooling. And the size effect in controlled cooling was discussed in cooling process of large-scale steel rod after rolling. The correctness of the numerical model was verified through a cooling experiment, which can provide an important basis of controlled cooling for process design and optimization of wire rod rolling.

关 键 词：大棒材 控制冷却 温度场 相变组织 尺寸效应 

分 类 号：TG335.12[金属学及工艺—金属压力加工]