1st Edition

Friction and the Hot Rolling of Steel

By Vladimir Panjkovic Copyright 2014
    239 Pages 139 B/W Illustrations
    by CRC Press

    240 Pages 139 B/W Illustrations
    by CRC Press

    When it comes to metal rolling, understanding and controlling frictional phenomena is essential to improving product and developing a more effective approach to friction reduction. Providing a historical perspective that goes as far back as the days of Leonardo da Vinci and continues up until the present day, Friction and the Hot Rolling of Steel chronicles the fundamental causes of friction. This book includes well-documented, on-site observations in various commercial plants, presents and examines practical problems, and provides a critical analysis of literary data related to the subject.

    It explains the base mechanisms of friction, and offers insight and instruction on improving the control and understanding of friction in hot strip mills and other industrial plants. The text presents mathematical models of friction in control and general engineering in a way that enables engineers to test and refine them in their plants. Engineers have the ability to use them to control friction and minimize its negative effects, particularly as it relates to energy waste and product defects.

    Organized into four sections, this book outlines the evolutional concepts of friction, and covers the general phenomena relevant to the rolling of metals. This includes the impact of roughness and velocity, basics of liquid and solid lubrication, mathematical modelling, and the properties of materials that affect friction in steel rolling, such as metals, oxides, and carbides. It connects the theoretical concepts, laboratory-scale observations, and phenomena in other areas of science and engineering to the large-scale industrial process of hot rolling. It also addresses roll properties, oxidation, wear and chemical composition of rolls and their impact on friction, the evolution of friction over schedules and roll campaigns, and mathematical modelling of friction in hot rolling.

    Friction and the Hot Rolling of Steel contains a large body of technical information that includes various chemical and physical properties of relevant materials, mathematical models, and plant and laboratory observations. It also provides an extensive reference list of sources that address specific problems and interests in more detail.

    • Presents practical problems that help academics and industrial researchers to identify promising new research areas in tribology and metal processing
    • Offers an insight into the principles of the effective research that combines both academic excellence and industrial relevance
    • Illustrates with observations and easy-to-understand analogies, enhancing the understanding and control of the mechanisms that influence friction in industrial plants

    This text services technical, research, and academic personnel working in steel processing, railway engineering, rolling of other metals, solid lubrication, the automotive industry, and more.

    Section I History of Friction: From da Vinci to Now

    Early Studies of Friction

    Leonardo da Vinci

    Robert Hooke

    Guillaume Amontons

    References

    The Eighteenth Century

    France: Parent, Camus, Bélidor

    German-Speaking Lands: Leupold, Euler, Leibnitz

    Russia

    Desaguliers and the Concept of Adhesion

    Pieter van Musschenbroek

    Coulomb: Life, and Studies of Friction

    References

    The Nineteenth Century

    Dry Friction

    Liquid Lubrication

    References

    The Twentieth Century and Beyond

    Stribeck Curve

    Ludwig Gümbel

    Resurrection of the Molecular Theory of Friction

    Bowden and Tabor

    Ernst and Merchant

    More Recent Views on Friction at Macroscopic Level

    Studies of Friction at Microscopic and Atomic Levels

    Application of Adhesion Concept to Hot Rolling

    References

    Section II Phenomena Relevant to Friction and the Rolling of Hot Metals

    Roughness and Friction

    References

    Liquid Lubrication, Stribeck Curve and Friction-Velocity

    Dependence

    References

    Solid Lubricants

    Impact of Sliding Velocity and Load

    Various Explanations of Friction–Velocity Dependence

    Some Specific Aspects of Solid Lubrication

    References

    Modelling of Friction in Control Engineering

    Static Friction Models

    Dynamic Friction Models

    Experimental Validation of Models

    References

    Modelling of Macroscopic Friction

    Ernst and Merchant, with Recent Variations

    Straffelini, and the Work of Adhesion

    References

    Friction on Atomic and Molecular Scales

    Some Issues Specific to Atomic Scale Friction

    Friction of Metals

    References

    Tribological Properties of Oxidised Metals and Carbides

    General

    Iron Oxides

    Chromium and Molybdenum Oxides

    Oxide Glaze

    Properties of Key Carbides

    References

    Section III From Theoretical Concepts to Industrial Hot Rolling Processes

    Chemical Composition and Microstructure of the Shells of HSS, HiCr and ICDP Work Rolls

    Elemental Composition of Rolls and Carbides

    Carbide Structure and Content

    Role of Key Elements

    Roll Chemistry and Roll Microstructure

    Microstructure and Its Impact on Friction

    Impact of Rare Earths and Silicon

    References

    Presence and Behaviour of Oxides in Roll Gap

    Mechanism of Oxide Formation

    Properties of Oxide on Rolls

    Impact of Oxides on Friction in Roll Gap

    Modelling of Oxide Growth

    References

    Impact of Roll Wear on Friction

    Basic Types of Roll Wear

    Roll Surface Monitoring System Observations

    Formation of Fire Cracks and Depth of Damage on Different Roll Types

    References

    Friction Evolution over Schedules and Campaigns

    Schedule

    Campaign

    Discussion

    References

    Relationship between Friction and Chemical Composition of Rolls

    Differences in Friction between Same Type Rolls

    Relationship between Friction and Chemistry of Roll Shells

    Discussion

    References

    Mathematical Models of Friction in Steel Rolling

    Empirical Models

    First-Principle Models

    Model Based on Commercial Mill Data

    References

    Section IV Appendices: Technical Details

    Appendices

    Index

    Biography

    Vladimir Panjkovic, PhD, graduated with a degree in electrical engineering from the University of Novi Sad, and earned his PhD in materials science and engineering from the University of New South Wales. His fields of work include the applications of artificial intelligence to process control, development and deployment of mathematical models of ironmaking processes and steel rolling, analysis of tribological problems in hot strip rolling, and the design and commissioning of thermal equipment. Panjkovic has been awarded the BlueScope Steel Research Excellence Award; the National Project Excellence Award in Automation, Control and Instrumentation; and the John A. Brodie medal in chemical engineering.