Effect of CaO/Al2O3 Ratio in Fluorine-Free Refining Slag with Low Basicity on the Cleanliness of SWRS82B Steel

被引：0

作者：

Luo, Ruiqi ^{[1
]}

Zhao, Yudong ^{[1
]}

Wang, Linzhu ^{[1
,2
,3
]}

Chen, Chaoyi ^{[1
]}

Li, Junqi ^{[1
,4
]}

机构：

[1] Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China

[2] Shanghai Univ, State Key Lab Adv Special Steel, Shanghai 200444, Peoples R China

[3] Shougang Shuicheng Iron & Steel Grp Co LTD, Shougang Grp Co Ltd, Liupanshui 553028, Guizhou, Peoples R China

[4] Guizhou Univ, Guizhou Prov Univ, Key Lab High Performance Battery Mat, Guiyang 550025, Guizhou, Peoples R China

来源：

STEEL RESEARCH INTERNATIONAL | 2024年 / 95卷 / 12期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

fluorine-free refining slags; low basicities; SWRS82B coil steels; AL2O3; INCLUSIONS; KINETIC-MODEL; BEHAVIOR; VOLATILIZATION; ROD;

D O I：

10.1002/srin.202400314

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A fluorine-free quaternary CaO-Al2O3-SiO2-MgO refining slag for SWRS82B coil steel is studied by considering the requirements of the steel wire. Laboratory experiments are conducted to study the equilibrium and kinetics of steel-slag reactions. The physical and chemical properties of refining slags, including the melting temperature, viscosity, and MgO solubility, are estimated by FactSage7.2 calculation. The cleanliness of SWRS82B steel refined by slags with a basicity of 1 and C/A ratio in the range of 1.36-7.13 is studied systematically. The plasticity of inclusions is studied by phase diagram and Young modulus calculation. Deoxidizing capacity and desulfurization capacity of refining slags are discussed by kinetic calculation of steel-slag reactions based on FactSage7.2 macro-editing and the kungliga tekniska h & ouml;gskolan model. Slag with a composition of 42%CaO-47%SiO2-4%Al2O3-7%MgO has the best refining effect, in which impurity elements are lowest and plastic inclusions with the smallest size and least quantity are obtained. The impurity elements oxygen and sulfur in steel can be controlled for 29 and 75 ppm, respectively. The average size of inclusions is 1.54 mu m. The majority of inclusions are in a liquid state at 1600 degrees C and Young modulus of the inclusions ranges from 99.78 to 152.87 GPa.

引用

页数：11