【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C0.47%~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。更多还原

【Abstract】 The 230 mm×230 mm×（1 350） mm LZ50 steel billet for vehicle axle is produced by quality hot metal pretreatment-120 t converter melting and SiAlBaSrCa combined deoxidizing-ladle refining with Si-Ca powder injection + RH-TB vacuum degassing-5 t 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.更多还原