作者：安航航
页数：212
出版社：冶金工业出版社
出版日期：2022
ISBN：9787502491239
电子书格式：pdf/epub/txt
内容简介
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。
目录
Chapter 1 Heredity of Center Segregation in Bloom on Hot Rolled Bars
1.1 Introduction
1.2 Experimental Section
1.2.1 Determination of Continuous Casting Parameters
1.2.2 Samples Analysis
1.3 Results and Discussions
1.3.1 Solidification End of Bloom
1.3.2 Magnetic Field Characteristics of Electromagnetic Stirring
1.3.3 Influencing Factors of Solidification Structure and Center Segregation
1.3.4 The Heredity of Center Segregation in Bloom on the Heredity
1.4 Conclusions
References
Chapter 2 Evolution of Solidification Law and Structure in Bloom
2.1 Introduction
2.2 Mathematical Models
2.2.1 Thermophysical Properties of Material
2.2.2 Heat Transfer Model
2.2.3 Nucleation Model
2.2.4 Dendrite Tip Growth Kinetics Model
2.2.5 Calculation Procedure of CAFE Model
2.2.6 SDAS Model
2.3 Model Verification
2.3.1 Validation of Heat Transfer Model
2.3.2 Validation of CAFE Model
2.3.3 Verification of SDAS Model
2.4 Results and Discussion
2.4.1 Effect of CC Process Parameters on Solidification Behavior
2.4.2 Effect of CC Process Parameters on Solidification Structure
2.4.3 Effect of CC Process Parameters on SDAS
2.4.4 Optimization of CC Process Parameters
2.5 Conclusions
References
Chapter 3 Macrosegregation of High Carbon Steel Bloom with M-EMS
3.1 Introduction
3.2 Experimental Method
3.3 Mathematical Models
3.3.1 Basic Assumption
3.3.2 The Fluid Flow Model
3.3.3 Heat Transfer Model
3.3.4 Solute Transport Model
3.3.5 The Electromagnetic Model
3.3.6 Model Validation
3.4 Result and Discussion
3.4.1 Macrosegregation in the Cross Section of High Carbon Steel Bloom
3.4.2 Formation of Negative Segregation Band in High Carbon Steel Bloom
3.4.3 Influencing Factors of Negativesegregation Band
3.5 Conclusions
References
Chapter 4 Macrosegregation Control in Billet and Bloom by M+F-EMS
4.1 Introduction
4.2 Development and Application of Electromagnetic Torque Device
4.2.1 Electromagnetic Torque Model with M-EMS
4.2.2 Design of the Electromagnetic Torque Device
4.2.3 Investigation Method
4.2.4 Results and Discussion
4.3 Effects of Electromagnetic Stirring on Fluid Flow and Temperature Distribution
4.3.1 Model Description
4.3.2 Results and Discussion
4.4 Industry Application
4.4.1 Improvement of Macrosegregation in Billet by M-EMS
4.4.2 Reduction of Center Segregation in Billet by M+F-EMS
4.4.3 Control of Macrosegregation in Rectangular Bloom by M+F-EMS
4.5 Conclusions
References
Chapter 5 Control of Macrosegregation in Bloom by M+F-EMS and MSR
5.1 Introduction
5.2 Reducing Macrosegregation in High Carbon Steel Bloom by F-EMS and MSR
5.2.1 Model Description
5.2.2 Determining of Process Parameters
5.2.3 Model Validation and Application
5.3 High-efficiency CC of High Carbon Steel Bloom by M+F-EMS and MSR
5.3.11 Background
5.3.2 Model Description and Validation
5.3.3 Experiments
5.3.4 Results and Discussion
5.4 Improvement of Macrosegregation in Bloom Using DSR
5.4.1 Investigation Work
5.4.2 Determination of Process Parameters
5.4.3 Optimization Application
5.5 Conclusions
References
1.1 Introduction
1.2 Experimental Section
1.2.1 Determination of Continuous Casting Parameters
1.2.2 Samples Analysis
1.3 Results and Discussions
1.3.1 Solidification End of Bloom
1.3.2 Magnetic Field Characteristics of Electromagnetic Stirring
1.3.3 Influencing Factors of Solidification Structure and Center Segregation
1.3.4 The Heredity of Center Segregation in Bloom on the Heredity
1.4 Conclusions
References
Chapter 2 Evolution of Solidification Law and Structure in Bloom
2.1 Introduction
2.2 Mathematical Models
2.2.1 Thermophysical Properties of Material
2.2.2 Heat Transfer Model
2.2.3 Nucleation Model
2.2.4 Dendrite Tip Growth Kinetics Model
2.2.5 Calculation Procedure of CAFE Model
2.2.6 SDAS Model
2.3 Model Verification
2.3.1 Validation of Heat Transfer Model
2.3.2 Validation of CAFE Model
2.3.3 Verification of SDAS Model
2.4 Results and Discussion
2.4.1 Effect of CC Process Parameters on Solidification Behavior
2.4.2 Effect of CC Process Parameters on Solidification Structure
2.4.3 Effect of CC Process Parameters on SDAS
2.4.4 Optimization of CC Process Parameters
2.5 Conclusions
References
Chapter 3 Macrosegregation of High Carbon Steel Bloom with M-EMS
3.1 Introduction
3.2 Experimental Method
3.3 Mathematical Models
3.3.1 Basic Assumption
3.3.2 The Fluid Flow Model
3.3.3 Heat Transfer Model
3.3.4 Solute Transport Model
3.3.5 The Electromagnetic Model
3.3.6 Model Validation
3.4 Result and Discussion
3.4.1 Macrosegregation in the Cross Section of High Carbon Steel Bloom
3.4.2 Formation of Negative Segregation Band in High Carbon Steel Bloom
3.4.3 Influencing Factors of Negativesegregation Band
3.5 Conclusions
References
Chapter 4 Macrosegregation Control in Billet and Bloom by M+F-EMS
4.1 Introduction
4.2 Development and Application of Electromagnetic Torque Device
4.2.1 Electromagnetic Torque Model with M-EMS
4.2.2 Design of the Electromagnetic Torque Device
4.2.3 Investigation Method
4.2.4 Results and Discussion
4.3 Effects of Electromagnetic Stirring on Fluid Flow and Temperature Distribution
4.3.1 Model Description
4.3.2 Results and Discussion
4.4 Industry Application
4.4.1 Improvement of Macrosegregation in Billet by M-EMS
4.4.2 Reduction of Center Segregation in Billet by M+F-EMS
4.4.3 Control of Macrosegregation in Rectangular Bloom by M+F-EMS
4.5 Conclusions
References
Chapter 5 Control of Macrosegregation in Bloom by M+F-EMS and MSR
5.1 Introduction
5.2 Reducing Macrosegregation in High Carbon Steel Bloom by F-EMS and MSR
5.2.1 Model Description
5.2.2 Determining of Process Parameters
5.2.3 Model Validation and Application
5.3 High-efficiency CC of High Carbon Steel Bloom by M+F-EMS and MSR
5.3.11 Background
5.3.2 Model Description and Validation
5.3.3 Experiments
5.3.4 Results and Discussion
5.4 Improvement of Macrosegregation in Bloom Using DSR
5.4.1 Investigation Work
5.4.2 Determination of Process Parameters
5.4.3 Optimization Application
5.5 Conclusions
References
