Abstract: The production flow sheet for steel TL1114Nb (% ：0. 07 - 0. 13C, 0. 80 - 1. 25Mn, 0. 10 〜0.30Si, ≤ 0.010P, ≤0.010S, 0. 03 〜0.05Nb, 0. 02 〜0. 07All) is 100 t UHP arc furnace-LF (VD)-150 mm x 150 mm billet casting-continuous rolling process. Examination results show that by using reasonable heating temperature for rolling ( 1 100 ~ 1 200 ℃ ) , suitable increasing finishing rolling temperature (780 ~ 820℃ ) and coiling temperature (700℃ ) , controlling cooling speed after rolling ( spraying water for 4 s, fan cooling) , all the various indexes of properties of hot rolled strip steel TL1114Nb are qualified i. e. strip grain size rating 10 ~ 10. 5 , structure- ferrite + pearlite without abnormal structure, strip yield strength R_el 440 -460 MPa, tensile strength R_m 530 - 550 MPa, elongation A 31. 5% - 33. 0% , cokl-bending ( d=a) test qualified.

摘要： TL1114Nb(%:0.07～0.13C、0.80～1.25Mn、0.10～0.30Si、≤0.010P、≤0.010S、0.03～0.05Nb、0.02～0.07Alt)钢的生产流程为100 t UHP电弧炉-LF(VD)-150 mm×150 mm连铸-连轧工艺。研制结果表明,通过采用合理的轧制加热温度(1 100～1 200℃),适当提高终轧温度(780～820℃),控制轧后冷速(喷水4 s,风冷)和卷取温度(700℃),带钢各项指标合格:TL1114Nb热轧钢带的晶粒为10～10.5级,组织为铁素体+珠光体,无异常组织,带钢的屈服强度R_el 440～460 MPa,抗拉强度R_m 530～550 MPa,伸长率A 31.5%～33.0%,冷弯d=a合格。

关键词: 100t EAF-LF(VD)-CC-连轧流程, 铌微合金化, 热轧带钢, 汽车后桥横梁钢, 开发