攀钢转炉-大方坯连铸工艺生产齿轮钢20CrMoH的实践  

Practice on Production of Gear Steel 20CrMoH by Converter-Bloom Concasting Process at Panzhihua Iron and Steel

作　　者：蒲学坤[1] 

机构地区：[1]攀枝花钢铁研究院,攀枝花617000

出　　处：《特殊钢》2005年第4期36-37,共2页Special Steel

摘　　要：攀钢采用120t顶底复吹转炉→LF+RH精炼→大方坯连铸(280mm×380mm)→热轧工艺生产规格为Φ25～60mm的20CrMoH齿轮钢,检验结果表明,成品检验结果为成分(%):C0.19～0.22,Mn0.54～0.58,Cr0.97～1.03,Mo0.18～0.19,P0.019～0.028,S0.006～0.012,ΔHRCJ9≤6、J15≤9,[O]≤20×10-6,A,B类夹杂≤1.5级,C,D类夹杂≤1.0级,机械性能和低倍组织均满足标准要求。The Φ25～60 mm round bars of gear steel 20CrMoH have been produced at Panzhihua Iron and Steel by 120 t top and bottom combined blown converter - LF+RH refining - 280 mm×380 mm bloom concasting - hot rolling process. The examination results showed that the products analysis was 0.19～0.22C, 0.54～0.58Mn, 0.97～1.03Cr, 0.18～0.19Mo, 0.019～0.028P, 0.006～0.012S; the hardenability band ΔHRC J_9 was ≤6, ΔHRC J_(15) ≤9, [O]≤20×10^(-6), inclusion rating number- type A, B ≤1.5 and type C, D ≤1; and the mechanical properties and macrostructure all met requirement of standard.

关 键 词：大方坯连铸 工艺生产 齿轮钢 攀钢 顶底复吹转炉 检验结果 RH精炼 标准要求 低倍组织 机械性能 IRC 夹杂 

分 类 号：TF762[冶金工程—钢铁冶金]