Abstract: The φ25～160 mm round bars of gear steel 20CrMnTiH-0.20～0.22C,0.25～0.31Si,0.93~ 1.00Mn,1.03~1. 15Cr,0.05~0.08Ti were pilot-produced by 120 t converter- 130t LF+RH-280mm×380mm bloom concasting - hot rolling process at Panzhihua Steel. The examination results showed that oxygen content in steel was (10~20) ×10^-6average14×10^-6), hardenability(J₉,J₁₅) band width - △HRC value≤7; mechanical and structure all met the requirement of standard GB/T5216-2004.

摘要： 攀钢采用120 t转炉-130 t LF+RH-280 mm×380 mm方坯连铸-热轧工艺生产Φ25～160 mm 20CrMnTiH齿轮钢(%:0.20～0.22C、0.25～0.31Si、0,93～1.00Mn、1.03～1.15Cr、0.05～0.08Ti)。检验结果表明,钢中氧含量(10～20)×10^-6(平均14×10^-6),淬透性(J₉,J₁₅)带宽△HRC值≤7,机械性能和组织均符合GB/ T5216-2004标准要求。