目前中高碳特殊钢方坯连铸生产过程中普遍采用电磁搅拌技术及与轻压下技术对控制宏观偏析，两种技术对宏观偏析的影响机理不同且多场耦合下宏观偏析存在更为复杂的变化规律，导致核心工艺参数确定存在较大技术难点。基于此，本书基于中高碳钢方坯连铸凝固过程温度场、凝固组织及宏观偏析的数值模拟的理论分析、结合实验室实验及工业试验综合系统研究，提出了中高碳特殊钢小方坯采用强搅拌的“结晶器电磁搅拌+末端电磁搅拌”复合电磁搅拌技术、大方坯采用“结晶器电磁搅拌+末端电磁搅拌+大压下量轻压下”的技术路线，为中高碳特殊钢方坯宏观偏析控制技术体系的构建提供了理论与实践指导。

安航航，1984年9月生，北京科技大学钢铁共性技术协同创新中心助理研究员。研究方向包括特殊钢铸坯内部质量控制、连铸过程多场耦合数值模拟、连铸二级控制模型开发以及基于数字化平台的连铸过程智能制造技术。近年来致力于高品质特殊钢均质化冶金技术的基础理论和工业应用研究。作为主要参与人参与国家科技重大专项及工信部智能制造新模式项目2项，参与并主持10余项与国内主要特钢公司合作的横向课题。获2020年度中国机械工业科学技术奖二等奖等5项省部级科技奖励。获国家发明专利授权4项，实用新型专利授权2项，发表钢铁冶金相关学术论文30余篇，以第一通讯作者发表中英文SCIEI论文11篇，其中钢铁冶金学科国际五大学术期刊论文8篇。

Chapter 1 Heredity of Center Segregation in Bloom on Hot Rolled Bars1.1 Introduction1.2 Experimental Section1.2.1 Determination of continuous casting parameters1.2.2 Samples analysis1.3 Results and Discussions1.3.1 Solidification end of bloom1.3.2 Magnetic field characteristics of electromagnetic stirring1.3.4 Influencing factors of solidification structure and center segregation1.3.5 The heredity of center segregation in bloom on the heredity1.4 ConclusionReferencesChapter 2 Evolution of Solidification Law and Structure in Bloom2.1 Introduction2.2 Mathematical Models2.2.1 Thermophysical properties of material2.2.2 Heat transfer model2.2.3 Nucleation model2.2.4 Dendrite tip growth kinetics model2.2.5 Calculation procedure of CAFE model2.2.6 SDAS model2.3 Model Verification2.3.1 Validation of heat transfer model2.3.2 Validation of CAFE model2.3.3 Verification of SDAS model2.4 Results and Discussion2.4.1 Effect of CC process parameters on solidification behavior2.4.2 Effect of CC process parameters on solidification structure2.4.3 Effect of CC process parameters on SDAS2.4.4 Optimization of CC process parameters2.5 ConclusionReferencesChapter 3 Macrosegregation of High Carbon Steel Bloom with M-EMS3.1 Introduction3.2 Experimental Method3.3 Mathematical Models3.2.1 Basic assumption3.2.3 The fluid flow model3.2.4 Heat transfer model3.2.5 Solute transport model3.2.6 The electromagnetic model3.2.7 Model validation3.4 Result and Discussion3.4.1 Macrosegregation in the cross section of high carbon steel bloom3.4.2 Formation of negative segregation band in high carbon steel bloom3.4.3 Influencing factors of negative segregation band3.5 ConclusionReferencesChapter 4 Macro Segregation Control in Billet and Bloom By M+F-EMS4.1 Introduction4.2 Development and Application of Electromagnetic Torque Device4.2.1 Electromagnetic torque model with M-EMS4.2.2 Design of the electromagnetic torque device4.2.3 Investigation method4.2.4 Results and discussion4.3 Effects of Electromagnetic Stirring on Fluid Flow and Temperature Distribution4.3.1 Model description4.3.2 Results and discussion4.4 Industry Application4.4.1 Improvement of macro segregation in billet by M-EMS4.4.2 Reduction of center segregation in billet by M+F-EMS4.4.3 Control of center segregation in rectangular bloom by M+ F-EMS4.5 ConclusionsReferencesChapter 5 Control of Macro Segregation in Bloom By M+F-EMS and MSR5.1 Introduction5.2 Reducing Macro Segregation in High Carbon Steel Bloom by F-EMS and MSR5.2.1 Model description5.2.2 Determining of process parameters5.2.3 Model validation and application5.3 High-efficiency CC of High Carbon Steel Bloom by M+F-EMS and MSR5.3.1 Background5.3.2 Model description and validation5.3.4 Experiments5.3.5 Results and discussion5.4 Improvement of macro segregation in Bloom Using DSR5.4.1 Investigation work5.4.2 Determination of process parameters5.4.3 Optimization application5.4 ConclusionsReferences