提高高碳钢洁净度的冶炼工艺研究  

Study on Refining Process for Improvement of Cleanliness of High Carbon Steel

作　　者：冯军[1] 陈伟庆[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼钢》2005年第6期41-43,52,共4页Steelmaking

摘　　要：在电弧炉-LF-小方坯连铸工艺生产高碳钢时,通过配加直接还原铁和铁水及生铁、改进电炉出钢脱氧脱硫方法、采用合理的精炼渣系和精炼后的吹Ar软搅拌,加强保护浇铸等措施,显著提高了钢的洁净度。使得成品的总w(O)达到15×10-6左右、w(N)在45×10-6左右、w(P)≤12×10-5、w(S)在5×10-5左右。钢中当量直径(5μm)的氧化物显微夹杂数量平均达到3.29个/mm2、84%的氧化物夹杂尺寸小于5μm,并且小方坯中大型夹杂物总量为5.48mg/10kg。The cleanliness of high carbon steel from EAF-LF-CC billet has been notably improved by means of a series technical measures such as charging DRI, hot metal and pig iron, changing the deoxidation and desulphurization methods for EAF at tapping stage, using appropriate refining slag series and applying Argon gas soft stirring and protection casting practice etc. As the results, the total （O） content attains about 15 ppm, （N） about 45 ppm, （P） about 0. 012% and （S） about 0. 005%. The average of nonmetallic inclusions （5 μm） approaches to 3.29 entries/mm^2 and the ratio of inclusions below 5 μm is 84%. The quantity of large inclusions in billets is less than 5.48 mg/10 kg.

关 键 词：高碳钢 精炼 洁净度 夹杂物 

分 类 号：TF741.3[冶金工程—钢铁冶金]