Study on the modification of inclusions by Ca treatment in GCr18Mo bearing steel

被引：17

作者：

Zheng, Hong-Yan ^{[1
,2
,3
]}

Guo, Shu-Qiang ^{[1
,2
,3
]}

Qiao, Meng-Ran ^{[1
,2
,3
]}

Qin, Li-Bin ^{[1
,2
,3
]}

Zou, Xiu-Jing ^{[1
,2
,3
]}

Ren, Zhong-Ming ^{[1
,2
,3
]}

机构：

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

[2] Shanghai Univ, Shanghai Key Lab Adv Ferromet, Shanghai 200444, Peoples R China

[3] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China

来源：

ADVANCES IN MANUFACTURING | 2019年 / 7卷 / 04期

基金：

中国国家自然科学基金;

关键词：

GCr18Mo bearing steel; Ca treatment; Inclusion modification; Deoxidization; Thermodynamics; CALCIUM; DEOXIDATION; EQUILIBRIUM; ALUMINUM; IRON;

D O I：

10.1007/s40436-019-00266-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Ca treatment on the modification of inclusions in Al-killed GCr18Mo bearing steel was studied and a thermodynamic and kinetic model was established. The experimental results showed that oxygen content in the steel could be reduced from 120 mu g/g to the range 5.5-21.6 mu g/g by Al-Ca complex deoxidization at 1 873 K. An appropriate increase in Ca/Al mass ratio is beneficial to reduce the total oxygen content in steel. When the content of dissolved aluminum was in the range of 0.03%-0.3%, with the increase of Ca/Al mass ratio from 0.8-1.6 to 2.4-3.2, the number of inclusions per unit area significantly reduced. In addition, the main types of inclusions were modified from large-sized Al2O3 clusters to plastic or semi-plastic liquid phase calcium aluminates. The experimental results matched well with the thermodynamic analysis.

引用

页码：438 / 447

页数：10

共 21 条

[1] Study of Inclusions in High Sulfur, Al-Killed Ca-Treated Steel via Experiments and Thermodynamic Calculations [J].