Cr3和Cr5系支承辊大型锻件脱氧工艺研究
Research on smelting deoxidation process of Cr3 and Cr5 roll steel large forgings
何川 1张延玲 1王冠博 1戴乐 2张威风 3石如星2
作者信息
- 1. 北京科技大学钢铁冶金新技术国家重点实验室,北京 100083
- 2. 洛阳中重铸锻有限责任公司,洛阳 471039
- 3. 北京科技大学钢铁冶金新技术国家重点实验室,北京 100083;洛阳中重铸锻有限责任公司,洛阳 471039
- 折叠
摘要
由于Cr3和Cr5系支承辊钢液中铬含量增加会抑制铝脱氧反应的进行.本文以Cr3和Cr5系支承辊冶金过程中脱氧工艺为研究背景,通过实验室脱氧实验,利用FactSage 8.1软件计算Cr3和Cr5系轧辊钢中氧含量,绘制铝脱氧平衡曲线,将Wagner模型与炉渣共存理论相结合,建立了钢渣反应模型,探讨铬含量对钢液中铝脱氧效果的影响.结果表明,钢液中铬含量在一定范围内增加会抑制铝脱氧反应进行;在精炼过程中,当Cr3系支承辊中铝含量控制在0.03%左右、Cr5系支承辊中铝含量控制在0.05%左右时,可将氧含量有效控制在10-5以下;而与之相匹配的最佳炉渣成分的碱度为2.5～3.0,w(Al2O3)>20%.
Abstract
Since the increase of chromium content in Cr3 and Cr5 bearing roll steel will inhibit the aluminum deoxidation reaction,this paper takes the deoxidation process in the metallurgical process of Cr3 and Cr5 bearing rolls as the research context,calculates the oxygen content of Cr3 and Cr5 roll steel by laboratory deoxidation experiments,and draws the aluminum deoxidation equilibrium curve by using FactSage 8.1 software,and establishes a steel-slag reaction model by combining the Wagner model with the slag coexistence theory to scrutinize the influence of chromium content on the aluminum deoxidation effect in steel.The Wagner model and the slag coexistence theory were combined to establish a steel slag reaction model to explore the influence of chromium content on the effect of aluminum deoxidation in steel.The results show that,within a certain range,the increase of chromium content in steel will inhibit the aluminum deoxidation reaction;in the refining process,the aluminum content in Cr3 supporting rolls should be controlled at about 0.03% and the aluminum content in Cr5 supporting rolls should be controlled at about 0.05%,so that the oxygen content can be effectively controlled at less than 10-5;and the alkalinity of the optimal slag composition to match it is 2.5-3.0,and the w(Al2O3)>20%.
关键词
轧辊钢/脱氧工艺/铬含量/钢渣反应模型/炉渣共存理论Key words
roll steel/deoxidation process/chromium content/steel-slag reaction model/slag coexistence theory引用本文复制引用
出版年
2024
NETL
NSTL
万方数据