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。
Abstract The production flow sheet for steel TLI 114Nb （% ：0. 07 -0. 13C, 0. 80 - 1.25Mn, 0. 10 -0. 30Si, ≤ 0. 010P, ≤0. 010S, 0. 03 -0. 05Nb, 0. 02 -0. 07Alt） is 100 t UHP are furnaee-LF （VD）-150 mm ×150 mm billet casting-continuous rolling process. Examination results show that by using reasonable heating temperature for rolling （ 1 100- 1200 ℃）, 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 Rm, 440 -460 MPa, tensile strength Rm, 530 -550 MPa, elongation A 31.5% -33.0% , cold-bending （d = a） test qualified.
出处
《特殊钢》
北大核心
2011年第2期34-36,共3页
Special Steel
