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Effect of Mold Electromagnetic Stirring Parameters on Segregation Level of a Medium-Carbon Steel

Oil country tubular goods (OCTG) is a class of steel used for oil and gas exploration in environments where pressure, temperature and acid solutions are frequently present. For this application, a fine-tuned combination of mechanical properties and surface quality are mandatory for the well integrity. One of the ways to reduce surface imperfections on the internal surface of pipes is by reducing solidification segregation. Based on that, this study evaluated the effect of varying the electrical current of mold electromagnetic stirring on segregation level of continuously cast bars of an OCTG steel. Both macro and microstructural characterization were performed to identify the effects of stirring current intensity. Results showed that too-high current levels increase spot segregation and chemical heterogeneity.
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2025/12 AIST Iron & Steel Technology December
PR-PM1225-3
Mariana da Mata Sacramento, José Francisco Caldeira Maranho, Stephano Piva, et al
December 01, 2025
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