IF钢碳含量不稳定因素分析  

Impact on the Instability of Carbon Content of IF Steel

作　　者：陈亮[1,2] 陈天明[2] 张桂芳[1] 曾建华[2] 施哲[1] 古隆建[2] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093 [2]攀枝花钢铁研究院,四川攀枝花617000

出　　处：《钢铁钒钛》2009年第1期68-73,共6页Iron Steel Vanadium Titanium

摘　　要：针对攀钢IF钢RH处理过程终点碳含量偏高及不稳定的问题,对IF钢生产工艺过程进行了跟踪调查。结果表明:RH处理前钢水[C]及α_([o])、真空度、脱碳时间、钢包耐火材料及合金增碳等是影响IF钢碳含量偏高及不稳定的主要因素。RH进站[C]含量高于0.045%,终点碳含量与进站碳含量成正比关系;最小真空度越低,脱碳时间越长,终点碳含量就越低。为保证攀钢IF钢碳含量合格,应将RH进站钢水碳含量控制在0.030%～0.045%、α_([o])控制在(500～700)×10^(-6),加强设备监控与维护以维持足够的深真空时间和进一步降低真空度。为减少RH处理后期钢液增碳,在保证真空室不结冷钢的前提下应使用渣线部位不含碳的钢包及低碳合金。In this paper, it aim at Panzhihua Steel RH refining process in the high carbon content and instability in IF steel production, its production process tracking survey shows that the impact of the carbon content of the main factors are RH initial steel [ C] and α[0], vacuum degree, decarburization time, carbon picking-up in molten steel caused by ladle refractory materials and alloys about Carbon Control of RH Refining Process for IF Steel in Panzhihua iron and steel company （PZHISC）. If the carbon content is more than 0.045 %, the end carbon content increases by initial carbon content. If the lowest vacuum degree is lower and progressing time is longer, the end carbon content is higher. To ensure that the carbon content of Panzhihua Iron and Steel IF steel qualified, initial [C] and α[0] should be controlled of 0.030% - 0.045% and （500- 700） × 10^-6, strengthen monitoring and maintenance of RH equipments are both needed to maintain adequate deep vacuum time and further reduce the vacuum degree. Also, in order to reduce the carbon picking-up in molten steel during the latter part of Rt4 process, on the premise of ensuring no solid steel on vacuum chamber, the ladle with a carbon-free slag line and low-carbon alloys should be used.

关 键 词：IF钢 RH精炼 脱碳 真空度 钢水增碳 

分 类 号：TG142.13[一般工业技术—材料科学与工程]