东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (5): 655-659.DOI: -

• 论著 • 上一篇    下一篇

热变形对超高强度管线钢组织及变形抗力的影响

张凯;邱春林;杜林秀;吴迪;   

  1. 东北大学轧制技术及连轧自动化国家重点实验室;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-05-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50527402)

Effects of hot deformation on microstructure and deformation resistance of ultra-high strength pipeline steel

Zhang, Kai (1); Qiu, Chun-Lin (1); Du, Lin-Xiu (1); Wu, Di (1)   

  1. (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-05-15 Published:2013-06-20
  • Contact: Zhang, K.
  • About author:-
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摘要： 运用光学显微镜和电子显微镜对不同热变形条件下组织、析出相进行观察与分析.研究结果表明:在1020℃奥氏体再结晶区轧制时,Nb,Ti以复相形式诱导析出,对组织细化产生一定影响.在保证积累压下量不变的情况下,奥氏体未再结晶区采用大压下量、少道次的轧制工艺对热变形奥氏体晶粒尺寸影响不大,对晶内变形带、亚结构和最终组织形貌及尺寸起到一定的作用.同时分析了再结晶轧制温度及未再结晶区轧制规程对变形抗力的影响

关键词: X120超高强度管线钢, 热轧工艺, 铌钛复合析出相, 大压下量, 变形带

Abstract: The microstructure of X120 ultra-high strength pipeline steel and precipitates during its hot deformation were characterized by optical microscope and electronic microscope. The results showed that the Nb-Ti diphase precipitate forms at 1020°C in the austenite recrystallization region when the steel is rolled, thus affecting the grain refinement somewhat. With the accumulated reduction kept unchanged, the effects of heavy reduction and a few number of passes on hot-deformed austenite size are small, while the effects on the deformation bands, substructure, final structure morphology and grain size are comparatively greater to a certain extent. Moreover, the effects of rolling temperature in recrystallization region and rolling schedule for non-recrystallized region on deformation resistance were analyzed.

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