Effect of process variables on scale formation in steel reheating

Authors

  • R. C. Ormerod IV,

    1. Centre for Advanced Gas Combustion Technology, Department of Chemical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
    2. Department of Mechanical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
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  • H. A. Becker,

    1. Centre for Advanced Gas Combustion Technology, Department of Chemical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
    2. Department of Mechanical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
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  • E. W. Grandmaison,

    Corresponding author
    1. Centre for Advanced Gas Combustion Technology, Department of Chemical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
    2. Department of Mechanical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
    • Centre for Advanced Gas Combustion Technology
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  • A. Pollard,

    1. Centre for Advanced Gas Combustion Technology, Department of Chemical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
    2. Department of Mechanical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
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  • A. Sobiesiak

    1. Centre for Advanced Gas Combustion Technology, Department of Chemical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
    2. Department of Mechanical Engineering, Queen's University, Kingston, ON K7L 3N6, Canada
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Abstract

Variables affecting the high temperature oxidation of steel were investigated using an experimental design strategy. The experimental methods included continuous mass-gain measurement to characterize the oxidation kinetics in terms of parabolic rate constants. A Morris and Mitchell (1983) eleven-run experimental design was used to identify main effects and interactions among seven independent variables (oxidation temperature, steel grade, steel surface condition, sample history and gas composition: H2O, O2 and CO2). The levels of these variables were chosen to reflect industrial steel reheat operations. The use of this type of strategy in assessing the effect of variables at an intermediate stage in an experimental program is also demonstrated.

Abstract

On a étudié les variables qui influent sur l'oxydation de l'acier à des températures élevées au moyen d'une stratégie de conception expérimentale. Les méthodes expérimentales incluent la mesure continu du gain de masse afin de caractériser la cinétique d'oxydation en termes de constantes de vitesse paraboliques. On a eu recours à une conception expérimentale à onze essais de Morris et Mitchell (1983) afin de déterminer les principaux effets et interactions parmi les sept variables indépendantes (température d'oxydation, qualité de l'acier, condition de surface de l'acier, histoire de l'échantillon et composition du gaz: H2 O, O2 et CO2). Les niveaux de ces variables ont été choisis afin de refléter les opérations de réchauffement d'acier industrielles. On démontre également l'utilisation de ce type de stratégie pour évaluer l'effet de variables à un stade intermédiaire dans un programme expérimental.

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