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 ›› 2013, Vol. 34 ›› Issue (1): 62-65.

• 组织和性能 • 上一篇    下一篇

SWRCH22A冷傲钢的热变形行为和动态再结晶

丁 贝1, 赵刚1,叶传龙1, 程剑1, 杨林1, 李正嵩2, 魏福龙2   

  1. 1武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉430081 ;
    2首钢水城钢铁(集团)有限责任公司技术中心,六盘水553028
  • 收稿日期:2012-08-18 出版日期:2013-02-01 发布日期:2022-09-14
  • 作者简介:丁贝( 1989-),女,硕士研究生,钢的组织性能的控制研究。
  • 基金资助:
    中国博士后科学基金资助项目(2012M511282)

Hot Deformation Behavior and Dynamic Recrystallization of Cold Heading Steel SWRCH22A

Ding Bei1 , Zhao Gang1 , Ye Chuanlong1 , Cheng Jian1 , Yang Lin1 , Li Zhengsong2, Wei Fulong2   

  1. 1 Key Lab for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081 ;
    2 Technological Center, Shougang Shuicheng Iron and Steel (Group) Co Ltd, Liupanshui 553028
  • Received:2012-08-18 Published:2013-02-01 Online:2022-09-14

摘要: 采用Gleeble-1500D热模拟试验机,对Φ30 mm SWRCH22A冷镦钢中间坯(/%:0.18~0.20C、≤0.05Si、0.80~0.88Mn、≤0.020P、≤0.015S、≥0.025A1)进行850~1000℃、变形速度O.1~20 s-1、真应变≤1.0的单道次压缩变形试验,得出该钢在不同变形条件下的真应力应变曲线:试验结果表明,随着温度的升高及应变速率的降低,钢的流动应力降低,且动态再结晶在高变形温度和低变形速率下更容易发生。SWRCH22A钢的动态再结晶变形能Qdef=328 264 J/ml。通过回归分析得到了SWRCH22A冷镦钢的流动应力模型和动态再结晶动力学方程,模型计算与试验结果吻合。

关键词: SWRCH22A冷镦钢, 单道次热压缩, 模拟试验, 流动应力, 动态再结晶

Abstract: The single pass compression test of <I)30 mm intermediate billet of cold heading steel SWRCH22A (/% : 0. 18 ~0. 20C, ≤0. 050Si, 0. 80 ~0. 88Mn, ≤0. 020P, ≤0. 015S, ≥O. 025Al) with strain rate 0. 1 ~20 s-1, real strain ≤1.0 at 850 ~ 1 000℃ has been carried out by using Gleeble-1500D thermal simulator to get true stress-stress curves of the steel with different deformation parameters. Test results show that with increasing temperature and decreasing strain rate, the flow stress of steel decreases, and its dynamic crystallization occurs easily with low strain rate at higher temperature. The dynamic recrystallization deforming energy of steel SWRCH22A Qdef = 328 264 J/mol. The flow stress model and dynamic crystallization equation of cold heading steel SWRCH22A are obtained by regression analysis. The model calculation value nicely coincides with the test measured value.