Characterization and evolution of non-metallic inclusions in GCr15 bearing steel during refining process

被引：0

作者：

Guo, Zhihong ^{[1
,2
]}

Lou, Xiangjie ^{[1
,2
]}

Wang, Jing ^{[1
,2
]}

Liu, Erkang ^{[3
]}

Wang, Qi ^{[1
,2
]}

Liu, Zhongxing ^{[1
,2
]}

Wang, Liming ^{[1
,2
]}

Zhu, Liguang ^{[1
,2
]}

机构：

[1] Hebei Univ Sci & Technol, Hebei Short Proc Steelmaking Technol Innovat Ctr, Sch Mat Sci & Engn, Shijiazhuang, Peoples R China

[2] Hebei Univ Sci & Technol, Sch Mat Sci & Engn, Shijiazhuang 050018, Peoples R China

[3] Univ Sci & Technol Beijing, Inst Powder Met & Adv Ceram, Sch Mat Sci & Engn, Beijing, Peoples R China

来源：

IRONMAKING & STEELMAKING | 2025年

基金：

中国国家自然科学基金;

关键词：

GCr15 bearing steel; LF refining; Inclusions; evolution behavior; thermodynamic calculation; HIGH-STRENGTH STEELS; SLAG;

D O I：

10.1177/03019233251353543

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The evolution of the inclusion characteristics of GCr15 bearing steel in industrial high basicity refining slag was studied. The number of inclusions with the size larger than 13 mu m (Ds inclusions) at the end of ladle furnace refining is 0.3 N/mm2, and the type of inclusions are MgO-Al2O3 and a small amount of CaO-Al2O3-MgO complex inclusions. At the end of RH refining, the number of Ds inclusions is 0.1 N/mm2, and the type of inclusions is CaO-Al2O3 with a high melting point. The inclusions in tundish stage are mainly high melting point CaO-Al2O3 inclusions, in which Ds inclusions disappear and 97% of the inclusions are less than 6 mu m. The transition mechanism of inclusions with different [Ca] and [Mg] contents was calculated by thermodynamic FactSage software. The results show that the basicity of refining slag has a great influence on the [Al] content and a little influence on the [Ca] content in molten steel. The [Al] content in molten steel can be increased by increasing the basicity and Al2O3 content of refining slag. This method can inhibit the formation of low melting point CaO-Al2O3 inclusions and reduce the size of inclusions.

引用

页数：12

共 37 条

[11] Mechanism study on the formation of liquid calcium aluminate inclusion from MgO.Al2O3Spinel [J].