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

作　　者：何川 张延玲 王冠博 戴乐 张威风 石如星 HE Chuan;ZHANG Yanling;WANG Guanbo;DAI Le;ZHANG Weifeng;SHI Ruxing(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Luoyang CITIC HIC Casting&Forging Co.,Ltd.,Luoyang 471039,China)

机构地区：[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

出　　处：《江西冶金》2024年第1期25-33,共9页Jiangxi Metallurgy

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(Al_(2)O_(3))>20%。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(Al_(2)O_(3))>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 

分 类 号：TF111.15[冶金工程—冶金物理化学] TG703[金属学及工艺—刀具与模具]