100t转炉-钢包炉精炼-连铸生产65Mn弹簧钢的工艺实践  

Practice of Production of Spring Steel 65Mn by 100t Converter-Ladle Furnace Refining-Concasting

作　　者：吕瑞国[1] 李京军[1] 阮细保[1] 

机构地区：[1]新余钢铁有限责任公司,新余338001

出　　处：《特殊钢》2005年第4期52-53,共2页Special Steel

摘　　要：采用100t顶底复吹转炉100t钢包炉(LF)精炼6机6流150mm×150mm方坯连铸机生产65Mn弹簧钢。转炉终点[C]0.08%～0.12%,[P]≤0.012%,[S]≤0.03%,增碳剂收得率为85%～90%。LF精炼渣碱度2.5～3.0,并喂SiCa线和吹氩。连铸时中间包钢水温度1495～1515℃,铸速1.6～1.8m/min,采用结晶器电磁搅拌。20炉65Mn钢质量检验结果表明,化学成分(%):C0.63～0.68,Mn0.95～1.07,P0.009～0.023,S0.006～0.017,连铸坯断面碳含量偏差≤0.02%C。65Mn钢盘条产品符合GB/T43541994要求。The spring steel 65Mn was produced by 100 t top and bottom combined blown converter melting - ladle furnace refining - 6 strand 150 mm×150 mm billet concasting. The end point [C] was 0.08%～0.12%, [P]≤0.012% and [S]≤0.03%, and the yield of recarburizer was 85%～90%. During refining the basicity of slag was 2.5～3.0 with feeding Si-Ca wire and argon stirring. During concasting the temperature of liquid steel in tundish was (1 495)～(1 515) ℃, the casting speed 1.6～1.8 m/min using mold electromagnetic stirring. The quality experiment results of 20 heats 65Mn steel showed that the analyses of steel were C 0.63～0.68, Mn 0.95～1.07, P 0.009～0.023, S 0.006～0.017, and the deviation of carbon content at section of casting billet was ≤0.02%. The coil products of 65Mn steel met the requirements of standard GB/T4354-1994.

关 键 词：65Mn弹簧钢 100t 钢包炉精炼 工艺实践 连铸生产 顶底复吹转炉 方坯连铸机 65MN钢 LF精炼 钢水温度 电磁搅拌 检验结果 化学成分 收得率 增碳剂 渣碱度 中间包 min 结晶器 碳含量 连铸坏 钢盘条 吹氩 铸速 

分 类 号：TF762.5[冶金工程—钢铁冶金]