Effect of Sulfur Mass Fraction on Inclusions in Steel E36 Deoxidized by Titanium and Zirconium

doi:10.3969/j.issn.1005-3026.2015.09.013

Abstract

Abstract: In order to study the effect of sulfur mass fraction on inclusions in steel E36 deoxidized by titanium and zirconium， steelmaking experiments of three heats of steel E36 were done in a MoSi₂ furnace with 70mm×100mm MgO crucible at 1873K. The results showed that most of the inclusions in steel E36 deoxidized by titanium and zirconium are spherical inclusions of TiO_○x and ZrO₂ coated by MnS. The typical inclusions are Al₂O₃-TiO_○x-MnS， MgO-SiO₂-Al₂O₃， Al₂O₃-SiO₂-TiO_○x-ZrO₂ and TiO_○x-SiO₂-Al₂O₃-MnS. With the increasing of the sulfur mass fraction in steel， the inclusion percentages with the diameter less than 10μm increase to 99.5%; the average diameter of the inclusions reaches 2.3μm from 1.7μm; the sulfur mass fraction in the inclusions and the area of MnS in single inclusion are also bigger， the area is 0.15% when w［S］ is 0.001 5%， and it becomes 0.72% when w ［S］ is 0.011%.

Key words: steelmaking, ship plate steel, sulfur mass fraction, inclusion, deoxidation

CLC Number:

TG142.1

ZHAN Dong-ping， TANG Lei， JIANG Zhou-hua， ZHANG Hui-shu. Effect of Sulfur Mass Fraction on Inclusions in Steel E36 Deoxidized by Titanium and Zirconium[J]. Journal of Northeastern University:Natural Science, 2015, 36(9): 1273-1277.

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