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氮合金化HRB500E钢的静态再结晶行为试验研究

武尚文 吴光亮 张永集 孟征兵

武尚文, 吴光亮, 张永集, 孟征兵. 氮合金化HRB500E钢的静态再结晶行为试验研究[J]. 西南交通大学学报, 2019, 54(6): 1314-1322. doi: 10.3969/j.issn.0258-2724.20170918
引用本文: 武尚文, 吴光亮, 张永集, 孟征兵. 氮合金化HRB500E钢的静态再结晶行为试验研究[J]. 西南交通大学学报, 2019, 54(6): 1314-1322. doi: 10.3969/j.issn.0258-2724.20170918
WU Shangwen, WU Guangliang, ZHANG Yongji, MENG Zhengbing. Static Recrystallization Behavior of Nitrogen Alloyed HRB500E Steel[J]. Journal of Southwest Jiaotong University, 2019, 54(6): 1314-1322. doi: 10.3969/j.issn.0258-2724.20170918
Citation: WU Shangwen, WU Guangliang, ZHANG Yongji, MENG Zhengbing. Static Recrystallization Behavior of Nitrogen Alloyed HRB500E Steel[J]. Journal of Southwest Jiaotong University, 2019, 54(6): 1314-1322. doi: 10.3969/j.issn.0258-2724.20170918

氮合金化HRB500E钢的静态再结晶行为试验研究

doi: 10.3969/j.issn.0258-2724.20170918
基金项目: 国家自然科学基金资助项目(50971135)
详细信息
    作者简介:

    武尚文(1989—),男,博士研究生,研究方向为特种钢制造工艺与产品研发,E-mail:wsw-csu@csu.edu.cn

  • 中图分类号: TF777.4

Static Recrystallization Behavior of Nitrogen Alloyed HRB500E Steel

  • 摘要: 为了对相关热轧工艺制度的确定提供必要的理论依据,采用应力松弛法研究了氮合金化HRB500E钢的静态再结晶行为,运用Gleeble-1500D热模拟试验机分析了不同的应变量、应变温度、应变速率对试验钢静态再结晶的影响,并与普通的钒微合金化HRB500E钢进行了对比. 依据试验结果,以Avrami 方程为基础,建立了两种试验钢的静态再结晶动力学模型,并进行了静态再结晶分数曲线与模型预测值的对比检验. 研究结果表明,控制两种试验钢的应变量在0.4~1.0区间递增,应变温度在950~1 100 ℃范围内递增,应变速率在0.1~1.0 s−1范围内递增时,其t0.5值(再结晶完成50%所需要的时间)均分别随之减少,再结晶速度加快;其中,应变量及应变温度对试验钢静态再结晶的影响较为显著,应变速率次之. 在应变条件相同的情况下,氮合金化HRB500E钢静态再结晶进程滞后于钒微合金化HRB500E钢. 检验结果表明,两种试验钢静态再结晶动力学模型预测结果与试验结果较吻合.

     

  • 图 1  试验钢的初始奥氏体组织

    Figure 1.  Initial austenite microstructure of test steels

    图 2  应力松弛曲线

    Figure 2.  Stress relaxation curve

    图 3  应力松弛试验热模拟示意

    Figure 3.  Stress relaxation test for thermal simulation

    图 4  应力松弛曲线

    Figure 4.  Stress relaxation curves for samples with different strain capacities

    图 5  再结晶动力学曲线

    Figure 5.  Recrystallization kinetics curves with different strain capacities

    图 6  t0.5与应变量关系曲线

    Figure 6.  Relationships between t0.5 and strain capacity

    图 7  应力松弛曲线

    Figure 7.  Stress relaxation curves for samples at different temperatures

    图 8  再结晶动力学曲线

    Figure 8.  Recrystallization kinetics curves at different temperatures

    图 9  t0.5与应变温度关系曲线

    Figure 9.  Relationships between t0.5 and strain temperature

    图 10  应力松弛曲线

    Figure 10.  Stress-relaxation curves for samples with different strain rates

    图 11  再结晶动力学曲线

    Figure 11.  Rrecrystallization kinetics curves with different strain rates

    图 12  t0.5与应变速率关系曲线

    Figure 12.  Relationships between t0.5 and strain rate

    图 13  lg t与lg(−ln(1−f))关系曲线

    Figure 13.  Relation curves of lg t与lg(−ln(1−f))

    图 14  预测值与试验值对比图

    实线为预测值;符号为测试值

    Figure 14.  Comparisons between predicted and experimental values

    图 15  相对误差对比

    Figure 15.  Comparison of relative errors

    表  1  试样铸坯实时参数及主要成分

    Table  1.   Main components and real-time parameters of samples in continous casting

    样品拉速/(m•min−1)热度/℃C/%Si/%Mn/%P/%S/%V/%N/%Ti/%
    1#2.8240.2100.3501.4900.0280.0320.0780.0110.005
    2#2.8200.2300.5401.5600.0330.0260.1100.005
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出版历程
  • 收稿日期:  2017-12-27
  • 修回日期:  2018-06-13
  • 网络出版日期:  2018-06-20
  • 刊出日期:  2019-12-01

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