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Abstract <p>The results of fundamental investigations of the physicochemical properties of the slags in the CaO–SiO<sub>2</sub>–FeO–MnO–P<sub>2</sub>O<sub>5</sub>–MgO and CaO–SiO<sub>2</sub>–B<sub>2</sub>O<sub>3</sub>–Al<sub>2</sub>O<sub>3</sub>–MgO systems are presented. They are the basis of a technology developed to melt semifinished steel products in oxygen converters and modern electric arc furnaces (EAFs) under magnesia-based slags. This technology provides a high-durability refractory lining in EAFs and a guaranteed low phosphorus content. Moreover, it includes innovative technological solutions for deep desulfurization and direct boron microalloying of structural steels in ladle furnaces (LFs) using environmentally friendly basic boron-containing slags. The introduction of these technological solutions has allowed for the production of next-generation low-carbon low-manganese-alloy boron-containing structural steels. These steels have a low sulfur content and enhanced mechanical properties, making them ideal for large-diameter strength class X80 pipes.</p>

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Scientific Foundations for the Development of Innovative Technological Solutions for Producing Next-Generation Structural Steels with Enhanced Properties

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • A. A. Babenko,
  • A. G. Upolovnikova,
  • L. Yu. Mikhailova,
  • A. N. Smetannikov

摘要

Abstract

The results of fundamental investigations of the physicochemical properties of the slags in the CaO–SiO2–FeO–MnO–P2O5–MgO and CaO–SiO2–B2O3–Al2O3–MgO systems are presented. They are the basis of a technology developed to melt semifinished steel products in oxygen converters and modern electric arc furnaces (EAFs) under magnesia-based slags. This technology provides a high-durability refractory lining in EAFs and a guaranteed low phosphorus content. Moreover, it includes innovative technological solutions for deep desulfurization and direct boron microalloying of structural steels in ladle furnaces (LFs) using environmentally friendly basic boron-containing slags. The introduction of these technological solutions has allowed for the production of next-generation low-carbon low-manganese-alloy boron-containing structural steels. These steels have a low sulfur content and enhanced mechanical properties, making them ideal for large-diameter strength class X80 pipes.