Abstract:  As the requirement for included element C, P, S and Si content in ultra-pure austenite steel 005Cr25Ni20 (% ：24 ~26Cr, 19 〜22Ni) are very low i. e. (%) ：≤0. 010C, ≤0. 010S, ≤0. 010P and W≤0. 15 Si, the steel is smelted by 3 t vacuum induction furnace 4- vacuum consumption remelting furnace steelmaking process. With using quality pure iron (% ： 0. 009C, 0. 035Si, 0. 001 2S, 0. 004 5P), high pure chromium iron (%: 0. 010 - 0. 021C, 0. 11 - 0. 13Si, 0. 002 5 ~0. 005 OS, 0. 001 5 ~0. 005 OP) and Ni-plate (Ni399%), adding Al, metal Ca, Ni-Mg for deoxidation during vacuum induction smelting, and whole process computer control vacuum consumption remelting speed, the chemical composition of finished products of steel is (% ：) 0. 005 〜0.007C, 0. 33 〜0. 34Mn, 0. 03 -0. 04Si, 0. 001 〜0.002S, 0. 004 〜 0. 005P, 24. 34 〜24. 62Cr, 21. 20 〜21.25Ni to meet the technical requirement, and the oxygen content in steel- (12 ~ 22) x 10^-6 is lower than in steel by ESR process- (30 ~ 80) x 10^-6.

Key words:  , Ultra-pure Austenite Stainless Steel 005Cr25Ni20, Vacuum Induction Furnace. Vacuum Consumption Remelting Furnace, Smelting Process

摘要： 005Cr25Ni20钢(%:24～26Cr、19～22Ni)要求C、P、S、Si等杂质元素含量低-(%):≤0.010C、≤0.010S、≤0.010P、≤0.15Si,因此采用3 t真空感应炉+真空自耗重熔炉冶炼工艺。通过采用优质纯铁(%:0.009C、0.035Si、0.001 2S、0.004 5P)、高纯铬铁(%:0.010～0.021C、0.11～0.13Si、0.002 5～0.005 0S、0.001 5～0.005 0P)和Ni板(Ni≥99%),真空感应炉熔炼时加A1、金属Ca、Ni-Mg脱氧,全程计算机控制真空自耗重熔速度,该钢成品化学成分为(%):0.005～0.007C、0.33～0.34Mn、0.03～0.04Si、0.001～0.002S、0.004～0.005P、24.34～24.62Cr、21.20～21.25Ni,达到技术要求,钢中氧含量为(12～22)×10^-6,低于电渣重熔钢的氧含量-(30～80)×10^-6。