摘要
通过210t顶底复吹转炉-LF-RH-宽厚板坯连铸流程对Q345E、Q345GJC和BQ550D等钢种进行45炉次RH脱气工艺试验,研究了RH真空处理对钢水脱氢、脱氧和脱氮效果的影响。得出,在RH真空度≤270Pa,环吹氩流量1200～1500L/min,高真空时间≥10min,钢中氢含量可达到≤2×10^(-6);当高真空时间为16min时,钢中氢、氧、氮含量平均分别为2.0×10^(-6)、13.2×10^(-6)和41×10^(-6)。
RH vacuum degas process test on 45 heats Q345E, Q345GJC and BQ550D etc. steel grades has been carried out by 210 t top and bottom combined blown converter-LF-RH-wide heavy slab CC flow sheet, and the effect of RH vacuum treatment on liquid dehydrogenation, deoxidization and denitriding is studied. It is obtained that with RH vacuum ≤270 Pa, circle blowing argon rate 1 200 - 1 500 L/min, high vacuum treatment for 〉t 10 min the hydrogen content in steel is ≤2 ×10-6, and with high vacuum treatment for 16 min the hydrogen, oxygen and nitrogen content in steel are re- soectivelv 2 ×10-6. 13.2×10-6 and 41.0×10-6.
出处
《特殊钢》
北大核心
2012年第6期16-17,共2页
Special Steel
