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

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, sug...

Full description

Saved in:
Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2017-10, Vol.48 (5), p.2447-2458
Main Authors: Zheng, Lichun, Malfliet, Annelies, Wollants, Patrick, Blanpain, Bart, Guo, Muxing
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Heat treating
Inclusions
Materials Science
Metallic Materials
Metallurgy
Nanotechnology
Steels
Structural Materials
Surfaces and Interfaces
Surfactants
Tellurium
Thin Films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-017-1050-5