Abstract: The production flow sheet of non-quenched and tempered steel S38MnSiV (/%: 0.41 ~0.45C, 0.55 ~ 0.70Si, 1.40~1.55Mn, ≤0.025P, ≤0.025S, 0.10 ~ 0.20Cr, 0.11 ~ 0.15V, 0.012 0 ~ 0.020 ON) is 40% hot metal + scrap-100 t EAF-LF-VD-160 mm x 160 mm ~260 mm x 340 mm CC process. With controlling arc furnace tap end [C] 0.15% ~ 0.30%, tapping [P]≤0. 012%, tapping temperature 1 640 ~ 1 680 °C, refining by high basicity slag, controlling aluminum content in liquid, after VD feeding manganese-nitride wire to control nitrogen content in liquid etc. process measure, the 8 heat steelmaking results show that oxygen content in steel- [O] x 10^-6 -11 x 10^-6, [H]1.2 x 10^-6 1. 5 x 10^-6 and [N] 135 x 10^-6- 180 x 10^-6, for the Φ140 mm round bar products rolled from 260 mm x 340 mm casting bloom with normalizing at 880℃ for 120 min, airflow cooling and tempered at 580℃ for 240 min air cooling, the tensile strength Rm is 870 ~925 MPa and the yield strength Re] is 560 - 605 MPa, its metallurgy quality all meets the requirement of standard.

摘要： 非调质钢S38MnSiV(/%:0.41～0.45C、0.55～0.70Si、1.40～1.55Mn、≤0.025P、≤0.025S、0.10～0.20Cr、0.11～0.15V、0.012 0～0.020 0N)的生产流程为40%铁水+废钢-100 t EAF-LF-VD-160 mm×160 mm～260mm×340 mm CC工艺。通过控制电弧炉出钢终点[C] 0.15%～0.30%,出钢[P]≤0.012%,出钢温度1 640～1 680℃,高碱度渣精炼,控制钢液铝含量,VD后喂氮化锰线控制钢液中氮含量等工艺措施,8炉生产结果表明,钢中氧含量-[O]5×10^-6～11×10^-6,[H]1.2×10^-6～1.5×10^-6,[N]135×10^-6～180×10^-6;260 mm×340 mm铸坯热孔成Φ140 mm棒材经880℃ 120 min正火风冷,580℃ 240 min回火空冷后的抗拉强度Rm为870～925 MPa,屈服强度Rel为560～605 MPa,其冶金质量满足标准要求。

关键词: S38MnSiV非调质钢, 100 t EAF-LF-VD-CC流程, , 工艺实践