摘要
太原钢铁集团公司第二炼钢厂引进的以预处理后铁水、合金为主要原料的不锈钢新生产线,在开发18-8型纯净不锈钢中,发挥主原料铁水Cu、P、S、等五害元素很低和VOD真空冶金的优势,对LF精炼不锈钢工艺进行优化;并采取措施优化中间包流体流场等,使得18-8纯净不锈钢铸坯O、Al2O3质量分数分别在30×10-6、5×10-6以下;金相法观察到50mm2铸坯内夹杂物总量降低幅度在40%左右,大于20μm的夹杂物控制在5%以下。
The stainless steel production line newly introduced in the No. 2 Steel-making Plant of Taiyun Iron ＆ Steel Group is a line which uses the pretreated hot metal and alloy elements as its primary raw materials. This new line has brought the superiority of extremenely low content of 5 harmful elements Cu, P, S and etc in the main raw material, the hot metal and VOD vacuum metallurgy into full play in developing the 18-8 grade stainless steel. By optimization of LF refining stainless steel process as well as optimization of the flow field of the tundish the inpurity of O and Al2O3 in the 18-8 grade stainless steel slab is reduced to less than 30 × 10^-6 and 5 × 10^-6 respectively. And by metallographical observation it＇s found that the total amount of inclusions in 50 mm^2 area of a slab is reduced by around 40% and the inclusions larger than 20μm in size are controlled in 5% or less.
出处
《炼钢》
CAS
北大核心
2009年第3期19-21,56,共4页
Steelmaking
关键词
18—8型
不锈钢
纯净钢
工艺
效果
type 18-8
stainless steel
clean steel
process
effect
