120 t转炉-LF+RH-TB生产LZ50车轴钢坯的化学成分和质量控制  

Control of Chemical Composition and Quality of LZ50 Steel Billet for Vehicle Axle Produced by 120 t Converter-LF + RH-TB Process

作　　者：许家彦[1] 王荣武[1] 

机构地区：[1]本溪钢铁集团公司,本溪117000

出　　处：《特殊钢》2005年第6期61-62,共2页Special Steel

摘　　要：本钢采用优质铁水预处理-120 t转炉冶炼、硅铝钡锶钙复合脱氧-钢包精炼喷Si-Ca粉+RH-TB真空脱气-5 t铸锭-轧制工艺生产230 mm×230 mm×1 350 mm LZ50轴坯钢.生产结果表明,由于控制C 0.47%～0.50%,Si 0.20%～0.35%,Mn 0.71%～0.85%,且钢中P、S≤0.02%,平均[H]=1.77×10-6,平均[O]=12.22×10-6,使轴坯钢具有良好的低倍组织和稳定的机械性能,产品质量达到TB/T2945-1999标准要求.The 230 mm×230 mm×1350 mm LZ50 steel billet for vehicle axle is produced by quality hot metal pretreatment -120t converter melting and SiAlBaSrCa combined deoxidizing - ladle refining with Si-Ca powder injection ＋ RHTB vacuum degassing -5t ingot casting - rolling process. The production results showed that due to controlling C content between 0.47%～0.50%, Si 0.20%～0.35%, Mn 0.71%～0.85%, both P, S in steel ≤0.02%, average [H] = 1.77×10^-6, average [O] = 12.22×10^-6, the LZ50 steel billet had excellent macro structure and constant mechanical properties, and the quality of products was up to the requirement of TB/T2945 standard.

关 键 词：顶底复吹转炉 LF+tLH-TB精炼 轴坯钢LZ50 冶金质量 工艺生产 质量控制 转炉冶炼 钢坯 化学成分 车轴 

分 类 号：TF711[冶金工程—钢铁冶金]