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 (6): 53-55.

• 组织和性能 • 上一篇    下一篇

精轧工艺对30 mm厚X65管线钢板组织和性能的影响

熊玉彰1, 李银华2, 王世森1, 徐进桥1, 余宏伟2   

  1. 1武钢集团公司研究院,武汉430080;
    2武钢集团鄂钢公司技术中心,鄂州436000
  • 收稿日期:2011-06-08 出版日期:2011-12-01 发布日期:2022-10-19
  • 作者简介:熊玉彰( 1963-),男,高级工程师,1985年武汉科技大学毕业,冶金工艺研究:

Effect of Finishing Rolling Process on Structure and Performance of 30 mm X65 Pipeline Steel Heavy Plate

Xiong Yuzhang1 , Li Yinhua2 , Wang Shisen1 , Xu Jinqiao1, Yu Hongwei2   

  1. 1 Research and Development Institute, Wuhan Iron and Steel (Group) Corp, Wuhan 430080;
    2 Technical Center, Echeng Iron anti Steel Co, Wuhan Steel Group, Ezhou 436000
  • Received:2011-06-08 Published:2011-12-01 Online:2022-10-19

摘要: Nb-Ti微合金化X65管线钢(/%:0.07C、1.60Mn、0.35Mo)的生产工艺流程为130 t顶底复吹转炉-钢包吹氩-LF-RH-250 mm×1500 mm板坯连铸-连轧至30 mm板-控冷工艺。研究了第Ⅱ阶段开轧(890~940℃)轧后冷却温度(780~850℃)和冷却速度(8~20℃/s)对X65钢厚板拉伸、落锤性能和组织的影响。结果表明,Ⅱ阶段开轧温度为940℃,轧后冷却速度为20℃/s可以使X65钢厚板得到以针状铁素体和粒状贝氏体为主的组织,钢板抗拉强度665~695 MPa,屈服强度495~520 MPa,落锤纤维组织率约为92%,满足标准要求。

Abstract: The production flow sheet for Nb-Ti microalloying pipeline steel X65 (/%: 0. 07C, 1. 60Mn, 0. 35Mo) is 130 t top and bottom combined blown converter-ladle argon blowing-LF-RH-250 mm X 1 500 mm slab casting-continuous rolling to 30mm plate-control cooling process. The effect of beginning rolling temperature (890 ~940 °C) in II rolling passes, cooling temperature (780 ~ 850℃) and cooling speed (8 ~ 20 ℃/s) after rolling on tensile properties, drop-weight tear test (DWTT) performance and structure of X65 steel heavy plate has been studied. Results show that with beginning rolling temperature 940 ℃ in II rolling passes and cooling speed 20 ℃/s after rolling the main structure in X65 steel heavy plate is acicular ferrite and granular bainite, the tensile strength and yield strength of plate are respectively 665 ~ 695 MPa and 495 〜520 MPa and the DWTT fibre structure ratio of plate is about 92% to meet the requirement of standard.