Inclusion Modification in Si-Mn Killed Steels using Titanium Addition

被引：15

作者：

Thapliyal, Vivek ^{[1
]}

Kumar, Abhishek ^{[1
]}

Robertson, David ^{[1
]}

Smith, Jeffrey ^{[1
]}

机构：

[1] Missouri Univ Sci & Technol, Rolla, MO 65409 USA

来源：

ISIJ INTERNATIONAL | 2015年 / 55卷 / 01期

关键词：

inclusion modification; ferro-titanium addition; thermodynamic modeling; LIQUID STEEL; REMOVAL; OPTIMIZATION; FLOW;

D O I：

10.2355/isijinternational.55.190

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Modification of inclusions by titanium (Ti) additions in low-alloyed Si-Mn killed steels was studied. Formation of the modified inclusions was studied by measuring the inclusion count and chemistry. Mn-Si Al-S-O based inclusions were observed in the steel, after Si-Mn de-oxidation, to which ferro-titanium (FeTi) additions were made. Thermochemical software (Fact Sage) was used to study the equilibrium between steel and inclusions and subsequent modification due to Ti addition. Inclusion count and chemistry in the steel were measured at different time intervals after the FeTi additions. MnO-SiO2 inclusions transformed to TiO2-MnO-SiO2 based inclusions with Ti replacing both Mn and Si in the inclusions. Si removal was more prominent from the inclusions compared to Mn. When more FeTi was added to the steel the inclusions further decreased in their Mn and Si content. With further FeTi addition Ti based inclusions with Al and Mn content less than 10% and Si content less than 5% were formed. MnS inclusions were also observed in the steel and formed as a result of segregation during solidification.

引用

页码：190 / 199

页数：10

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