东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (10): 1412-1416.DOI: 10.12068/j.issn.1005-3026.2014.10.011

• 材料与冶金 • 上一篇    下一篇

BH-IF钢超快速加热退火工艺

徐德超1，李俊1,2，孟庆格2，刘沿东1   

  1. (1 东北大学 材料与冶金学院， 辽宁 沈阳110819；2 宝钢集团中央研究院， 上海201900)
  • 收稿日期:2013-08-23 修回日期:2013-08-23 出版日期:2014-10-15 发布日期:2014-05-19
  • 通讯作者: 徐德超
  • 作者简介:徐德超(1989-)，男，山东日照人，东北大学博士研究生；李俊(1965-)，男，上海人，宝钢研究院教授级高工；刘沿东(1966-)，男，辽宁沈阳人，东北大学教授.
  • 基金资助:
    “十二五”国家科技支撑计划项目(2011BAE13B01，2011BAE13B03)

Ultrarapid Heating Annealing Process of BHIF Steel

XU Dechao1， LI Jun1,2， MENG Qingge2， LIU Yandong1   

  1. 1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China； 2. Central Research Institute of Baosteel， Shanghai 201900， China.
  • Received:2013-08-23 Revised:2013-08-23 Online:2014-10-15 Published:2014-05-19
  • Contact: MENG Qingge
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摘要： 研究了不同退火条件对BH-IF钢组织和织构演变及性能的影响.结果表明:随着加热速率的增加，BH-IF钢晶粒得到细化，但并不明显，强度和延伸率提高，再结晶织构仍为典型的管状γ织构；在超快速加热速率条件下，XRD织构分析显示BH-IF钢γ取向纤维织构组分及强度差异缩小，各组分更趋均匀.随保温时间增加，γ取向纤维织构强度增加，因而由其决定的r值(塑性应变比)增加.在超快速加热速率条件下，试样平行于轧向的r0降低，而垂直于轧向的r90增加，其均值rm无明显变化.

关键词: BH-IF钢, 加热速率, 塑性应变比, 再结晶织构, XRD

Abstract: The recrystallization texture evolution and mechanical properties of coldrolled BH (bakehardening)IF (interstitial free) steel were investigated under different annealing parameters. The results indicated that the tensile strength and the elongation increase with increasing heating rate. In the fully recrystallized condition， the ultrarapid heating gives rise to substantially refined structures with an unconspicuous reduction of average ferrite grain size. Under the condition of ultrarapid heating rate， XRD texture analysis showed that the difference in γ texture components and orientation intensity of BHIF steel get narrow and the γ texture becomes more homogenous. The strong γ texture is obtained simultaneously for both rapid and normal heating rate. The intensity of {111} texture increases with increasing holding time， so the r value increases. Under the ultrarapid heating rate， the r0 value decreases and the r90 increases， while the rm (average) remains almost unchanged.

Key words: BHIF steel, heating rate, plastic strain ratio, recrystallization texture, XRD

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