ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2011, Vol. 32 ›› Issue (2): 34-36.

• 工艺技术 • 上一篇    下一篇

南钢铌微合金化汽车后桥横梁用热轧钢带TL1114Nb的开发

郜书忠, 仇必宁, 李军   

  1. 南京钢铁联合有限公司带钢厂,南京210035
  • 收稿日期:2010-11-23 出版日期:2011-04-01 发布日期:2022-11-09
  • 作者简介:郜书忠( 1969-),男,工程师,1992年北京科技大学毕业,特殊钢带的开发:

Development of Hot Rolled Strip of Niobium Microalloying Steel TL1114Nb for Rear Axle Crossbeam of Auto at Nanjing Steel

Gao Shuzhong, Qiu Bining,  Li Jun   

  1. Hot Strip Rolling Mill, Nanjing Iron and Steel Co Ltd, Nanjing 210035
  • Received:2010-11-23 Published:2011-04-01 Online:2022-11-09

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Rel 440~460 MPa,抗拉强度Rm 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

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 Rel 440 -460 MPa, tensile strength Rm 530 - 550 MPa, elongation A 31. 5% - 33. 0% , cokl-bending ( d=a) test qualified.