Effect of Surfactant Te on the Formation of MnS Inclusions in Steel

Lichun Zheng, Annelies Malfliet, Patrick Wollants, Bart Blanpain, Muxing Guo

研究成果: Article査読

12 被引用数 (Scopus)

抄録

The effect of surfactant Te on the formation of MnS inclusions was studied by adding different amounts of Te to liquid steel at 1873 K (1600 °C). Coarse and fine MnS inclusions, which were formed, respectively, during and after solidification, were observed. Both types show a chain-like pattern, suggesting that they precipitate in the interdendritic regions. Te significantly decreases the area fraction of the coarse inclusions in the interdendritic regions. Moderate Te additions (25 and 50 ppm) make these inclusions more globular, whereas high Te addition (120 ppm) makes their surfaces rugged. Te also decreases the area fraction of the fine inclusions. High Te addition (120 ppm) modifies these inclusions from faceted to spherical, and makes them homogeneously distributed in the steel matrix. The suppressed precipitation of both coarse and fine MnS inclusions in the interdendritic regions suggests that Te alleviates S segregation. The mechanisms by which Te alleviates S segregation and modifies the morphology of MnS inclusions were discussed.

本文言語English
ページ(範囲)2447-2458
ページ数12
ジャーナルMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
48
5
DOI
出版ステータスPublished - 2017 10 1

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学

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