Investigation of nonmetallic inclusions in continuously cast carbon steel by dissolution of the ferritic matrix |
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| Affiliation: | 1. State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (USTB), Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;2. State Key Laboratory of Mineral Processing Science and Technology, Beijing General Research Institute of Mining and Metallurgy, Beijing 100070, China;1. Department of Manufacturing and Materials Engineering, University of Campinas — UNICAMP, 13083-860 Campinas, SP, Brazil;2. Federal Institute of Education, Science and Technology of Pará — IFPA, 66093-020 Belém, PA, Brazil;3. Department of Materials Engineering, Federal University of São Carlos — UFSCar, 13565-905 São Carlos, SP, Brazil |
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| Abstract: | One of the main steel plant's problems has been the occurrence of inclusions throughout the process of steel making. In this sense, it is very important to detect nonmetallic inclusions in the steel, to determine their origin and to control the formation of such inclusions, in order to generate a final product of high quality. The aim of this work is to present a characterization method for nonmetallic inclusions which uses the expedient of dissolving the ferritic matrix in hydrochloric acid (HCl). Scanning electron microscopy connected to an energy-dispersive spectrometer (EDS) system is used to obtain the morphology, size and chemical composition of such inclusions. This analysis allows a better understanding about the nature of the inclusions, their incidence and distribution along the process of steel manufacturing, providing subsidies to formulate corrective actions that minimize the occurrence of nonmetallic inclusions. |
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