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Abstract
The paper presents the results of statistical analysis of production data on sheet metal rejection by defects of different origin. On the example of sheet metal from steel grade C355 the influence of slag-forming mixture, casting batch, chemical composition of steel and temperature and speed mode of casting on sheet metal rejection by defect "mesh crack" is shown. It is shown that rolling mesh crack on sheet metals appears as a result of transformation of mesh cracks of cast billet. Causes of occurrence of defect "mesh crack" on cast billet and rolled products are established. The quantitative influence of technological parameters of casting (temperature of metal superheating in the intermediate ladle, casting speed, casting series, type of slag-forming mixture, hydrogen content in steel) on sheet metal defect "mesh crack" is revealed. Technological recommendations on reduction of sheet metal rejects are given.
Keywords:
mesh crack, slab billet, sheet metal, continuous casting, sheet rejection.
Zhenin Evgeny V. – Ph.D. (Eng.), Associate Professor of Metallurgical Technologies and Equipment Department, Novotroitsk branch of the University of Science and Technology MISIS, Novotroitsk, Russia. E-mail:
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Shapovalov Alexey N. – Ph.D. (Eng.), Associate Professor of Metallurgical Technologies and Equipment Department, Novotroitsk branch of the University of Science and Technology MISIS, Novotroitsk, Russia. E-mail:
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Dema Roman R. – Doctor of Engineering (D.Sc. (Technology), Professor of Metallurgical Technologies and Equipment Department, Novotroitsk branch of the University of Science and Technology MISIS, Novotroitsk, Russia.
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Amirov Ruslan N. – Ph.D. (Eng.), Associate Professor of the Department of Machines and Technologies of Pressure Processing and Mechanical Engineering, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia.
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Kudryashov Alexander А. – Ph.D. (Eng.), Associate Professor of the Department of Mining Machines and Transportation Technological Complexes, Nosov Magnitogorsk State Technical University,Magnitogorsk,Russia.
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