X65管线钢的控氮试验分析及预防措施  

Experimental analysis and Preventive Measures of Nitrogen Control for X65 Grade Pipeline Steel

作　　者：李艳[1] 吕亚[1] 刘磊[1] 王平[1] 王小峰[1] 张书铭[1] 

机构地区：[1]安阳钢铁集团有限责任公司

出　　处：《宽厚板》2013年第3期34-37,共4页Wide and Heavy Plate

摘　　要：安钢第二炼轧厂采用铁水预处理-顶底复吹转炉(BOF)-吹氩站-LF精炼炉-VD精炼炉-超宽板坯连铸机的工艺路线来生产X65管线钢。通过试验分析并结合实际冶炼情况找出影响钢液增氮的主要因素。增氮的主要环节为转炉(BOF)出钢、LF精炼、连铸机浇注3个环节,增氮的主要原因为钢液裸露、生产周期过长、物料带入及生产操作不规范等。通过采取增加VD工序等一系列措施,可将氮控制在(35～60)×10-6,满足了X65管线钢对[N]含量的要求。X65 grade pipeline steel is produced by taking a process route of hot metal pretreatment, BOF steel- making, argon stirring,ladle furnace refining,wide slab casting in No. 2 Steel Making and Rolling Plant of Anyang Iron and Steel Corporation. Major factors causing nitrogen increase in steel have been determined by tests and analysis based on actual melting process. Tile three major influencing procedures of Nitrogen increase includes BOF tapping, LF refining and continuous casting. The main causes of Nitrogen increase are molten steel exposure, longer production cycle, nitrogen introduced by furnace charge and nonstandard operation. By taking a series of measures like vacuum degassing, the nitrogen content is controlled down to （35 - 60） × 10^-6, satisfying the requirements of X65 grade pipeline steel on nitrogen content.

关 键 词：管线钢 氮 工艺分析 预防措施 

分 类 号：TF762[冶金工程—钢铁冶金]