Primer on Flat Rolling

Primer on Flat Rolling

2nd Edition - December 4, 2013

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  • Author: John Lenard
  • eBook ISBN: 9780080994123
  • Hardcover ISBN: 9780080994185

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Description

Primer on Flat Rolling is a fully revised second edition, and the outcome of over three decades of involvement with the rolling process. It is based on the author's yearly set of lectures, delivered to engineers and technologists working in the rolling metal industry. The essential and basic ideas involved in designing and analysis of the rolling process are presented. The book discusses and illustrates in detail the three components of flat rolling: the mill, the rolled metal, and their interface. New processes are also covered; flexible rolling and accumulative roll-bonding. The last chapter contains problems, with solutions that illustrate the complexities of flat rolling. New chapters include a study of hot rolling of aluminum, contributed by Prof. M. Wells; advanced applications of the finite element method, by Dr. Yuli Liu and by Dr. G. Krallics; roll design by Dr. J. B. Tiley and the history of the development of hot rolling mills, written by Mr. D. R. Adair and E. B. Intong. Engineers, technologists and students can all use this book to aid their planning and analysis of flat rolling processes.

Key Features

  • Provides clear descriptions for engineers and technologists working in steel mills
  • Evaluates the predictive capabilities of mathematical models
  • Assignments and their solutions are included within the text

Readership

University and industry libraries and also suitable for individual researchers in universities

Table of Contents

  • Dedication

    Preface to the Second Edition

    Preface to the First Edition

    Contributors

    Acknowledgements

    1. Introduction

    1.1 The Flat Rolling Process

    1.2 The Hot Rolling Process

    1.3 Continuous Casting

    1.4 Mini-Mills (See Also Chapter 2)

    1.5 The Cold Rolling Process

    1.6 The Warm Rolling Process

    1.7 Further Reading

    1.8 Conclusion

    2. History of Hot Strip Mills

    2.1 Hot Strip Mill Evolution

    2.2 Early Hot Strip Mills

    2.3 Early Steckel Mills

    2.4 Generation I Hot Strip Mills (USA)

    2.5 Generation II Hot Strip Mills (USA)

    2.6 Other Generation I and II Hot Strip Mills

    2.7 Generation III – Coil Box Hot Strip Mills

    2.8 Thin Slab Hot Strip Mills

    2.9 Newer Generation II Hot Strip Mills

    2.10 Modern Steckel Mills

    2.11 Hot Mill Electrical Systems

    2.12 Hot Strip Mill Innovations

    2.13 Revamped Hot Strip Mills

    3. Roll Design

    3.1 Introduction

    3.2 General Overview

    3.3 Historical Development of Rolls for Rolling Mills

    3.4 Roll Wear

    3.5 Friction and Wear

    4. Flat Rolling – A General Discussion

    4.1 The Flat Rolling Process

    4.2 The Physical Events Before, During and After the Pass

    4.3 The Metallurgical Events Before and After the Rolling Process

    4.4 Limitations of the Flat Rolling Process

    4.5 Conclusion

    5. Mathematical and Physical Modelling of the Flat Rolling Process

    5.1 A Discussion of Mathematical Modelling

    5.2 A Simple Model

    5.3 1D Models

    5.4 Refinements of the Orowan Model

    5.5 The Effect of the Inertia Force

    5.6 The Predictive Ability of the Mathematical Models

    5.7 The Friction Factor in the Flat Rolling Process

    5.8 Extremum Principles

    5.9 Comparison of the Predicted Powers

    5.10 The Development of the Mechanical Attributes of the Rolled Strip

    5.11 Miscellaneous Parameters and Relationships in the Flat Rolling Process

    5.12 How a Mathematical Model Should Be Used

    5.13 Conclusions

    6. An Advanced Finite Element Model of the Flat, Cold Rolling Process

    6.1 Introduction

    6.2 Modelling the Flat Rolling Process

    6.3 Experiments

    6.4 Results

    6.5 Comparison of the Experimental and Numerical Results

    6.6 Conclusion

    6.7 Acknowledgements

    7. Flat Rolling – Simulation and Reduction of Local Buckles in Cold Rolling

    7.1 Introduction

    7.2 Strain Rate Based Strip 3D Deformation Model

    7.3 Work Roll Thermal Crown Model

    7.4 Roll Stack Deformation Model

    7.5 Stress Unloading Model

    7.6 Local Buckling Threshold Model

    7.7 Local Buckling Shape Model

    7.8 Flow Chart of the Main Program

    7.9 Model Tuning and Verification

    7.10 User Interface

    7.11 Base Case for Local Shape Defect Simulation

    7.12 Effects of Entry Strip Profile Ridge

    7.13 Effect of Local Yield Stress Drop

    7.14 Roll Cooling Nozzle Clog or Work Roll Crown Ridge Effect

    7.15 Identification of Causes of Local Buckles

    7.16 Predicting Limiting Values for Factors Causing Local Buckles

    7.17 Reduction of Local Buckles

    8. Material Attributes

    8.1 Introduction

    8.2 Recently Developed Steels

    8.3 Steel and Aluminium

    8.4 The Independent Variables

    8.5 Traditional Testing Techniques

    8.6 Potential Problems Encountered During the Testing Process

    8.7 The Shape of Stress–Strain Curves

    8.8 Mathematical Representation of Stress–Strain Data

    8.9 Choosing a Stress–Strain Relation for Use in Modelling the Rolling Process

    8.10 Summary

    9. Tribology

    9.1 Tribology – A General Discussion

    9.2 Friction

    9.3 Determining the Coefficient of Friction or the Friction Factor

    9.4 Lubrication

    9.5 Dependence of the Coefficient of Friction or the Roll Separating Force on the Independent Variables

    9.6 Heat Transfer

    9.7 Roll Wear

    9.8 Nanotribology

    9.9 Conclusions

    10. Applications and Sensitivity Studies

    10.1 The Sensitivity of the Predictions of the Flat Rolling Models

    10.2 A Comparison of the Power Predictions Required for Plastic Deformation of the Strip

    10.3 The Roll Pressure Distribution

    10.4 The Statically Recrystallized Grain Size

    10.5 The Critical Strain

    10.6 The Hot Strength of Steels – Shida’s Equations

    11. Hot Rolling of Aluminium

    11.1 Introduction

    11.2 Hot Rolling Process

    11.3 Heat Transfer

    11.4 Deformation

    11.5 Microstructure Changes During Hot Rolling

    11.6 Summary

    12. Temper Rolling

    12.1 The Temper Rolling Process

    12.2 The Mechanism of Plastic Yielding

    12.3 The Effects of Temper Rolling

    12.4 Mathematical Models of the Temper Rolling Process

    12.5 Summary

    13. Severe Plastic Deformation – Accumulative Roll Bonding

    13.1 Introduction

    13.2 Manufacturing Methods of Severe Plastic Deformation

    13.3 A Set of Experiments

    13.4 Results and Discussion

    13.5 The Phenomena Affecting the Bonds

    13.6 A Potential Industrial Application: Tailored Blanks

    13.7 A Combination of ECAP and ARB

    13.8 Conclusions

    14. Roll Bonding

    14.1 Introduction

    14.2 Material, Equipment, Sample Preparation and Parameters

    14.3 Results and Discussion

    14.4 Examination of the Interface

    14.5 The Phenomenon of Bonding

    14.6 Conclusions

    15. Flexible Rolling

    15.1 Introduction

    15.2 Material, Equipment, Procedure and Sample Preparation

    15.3 Results and Discussion

    15.4 Predictions of a Simple Model

    15.5 Strain at Fracture

    15.6 Conclusions

    16. Problems and Solutions

    Part 1 Problems

    Part 2 Solutions

    Appendix

    List 1 Early USA Hot Strip Mills (Throughputs in Short Tons)

    Total Annual Capacity: 17,616,000 TPY

    List 3 USA Generation I Hot Strip Mills (Throughputs in Short Tons)

    Total Annual Capacity: 55,809,000 TPY

    Total Annual Capacity: 34,700,000 TPY

    List 6 Worldwide Coil Box Hot Strip Mills

    List 7 SMS Siemag Thin Slab Hot Strip Mills

    List 8 Mannesmann Demag Thin Slab Hot Strip Mills

    List 9 Some of the Danieli Thin Slab Hot Strip Mills

    List 10 Misubishi Hitachi Thin Slab Hot Strip Mills

    List 11 Arvedi Cremoni/Siemens VAI ESP Thin Slab Hot Strip Mill

    List 12 Some of the Newer Generation II Hot Strip Mills

    List 13 Some of the Modern Steckel Mills

    References

Product details

  • No. of pages: 450
  • Language: English
  • Copyright: © Elsevier 2013
  • Published: December 4, 2013
  • Imprint: Elsevier
  • eBook ISBN: 9780080994123
  • Hardcover ISBN: 9780080994185

About the Author

John Lenard

Affiliations and Expertise

Department of Mechanical and Mechatronics Engineering, University of Waterloo, Ontario, Canada

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