退火温度对Fe-24.38Mn-0.44C TWIP钢组织性能的影响

doi:10.13251/j.issn.0254-6051.2022.02.026

金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 146-152.DOI: 10.13251/j.issn.0254-6051.2022.02.026

退火温度对Fe-24.38Mn-0.44C TWIP钢组织性能的影响

代永娟¹, 武祥祥¹, 李佳坤², 国栋¹, 王波²

1.天津职业技术师范大学机械工程学院, 天津 300222;
2.河北科技大学材料科学与工程学院, 河北石家庄 050018

收稿日期:2021-06-27 修回日期:2021-08-20 出版日期:2022-02-25 发布日期:2022-04-01
作者简介:代永娟(1975—),女,副教授,博士,主要研究方向为高强韧钢的研究及开发,E-mail:dai951236@163.com
基金资助:
国家自然科学基金面上项目(51674096, 51874117);河北省自然科学基金面上项目 (E2019208432)

Effect of annealing temperature on microstructure and properties of Fe-24.38Mn-0.44C TWIP steel

Dai Yongjuan¹, Wu Xiangxiang¹, Li Jiakun², Guo Dong¹, Wang Bo²

1. School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, China;
2. School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang Hebei 050018, China

Received:2021-06-27 Revised:2021-08-20 Online:2022-02-25 Published:2022-04-01

摘要/Abstract

摘要： 以冷轧Fe-24.38Mn-0.44C钢为研究对象,通过光学显微镜(OM)、透射电镜(TEM)、室温拉伸等试验手段,研究了不同退火温度(部分再结晶退火、再结晶退火以及高温退火)下其微观组织及力学性能的演变。结果表明,随着退火温度降低,试验钢的微观组织由高温退火时粗大的无畸变等轴再结晶晶粒逐渐向纳米级变形孪晶和细小的再结晶晶粒混合组织转变,强化机制逐渐由孪生滑移为主向位错滑移为主纳米孪晶强化为辅的机制转变,导致试验钢屈服强度迅速提高,屈强比由0.36提高到0.49,伸长率有所降低。

关键词: 孪晶诱导塑性, 退火温度, 晶粒尺寸, 强化机制

Abstract: Evolution of microstructure and mechanical properties of the cold-rolled Fe-24.38Mn-0.44C steel at different annealing temperatures (partial recrystallization annealing, recrystallization annealing and high temperature annealing) was studied by means of OM, TEM and tensile test at room temperature. The results show that with the decrease of annealing temperature, the microstructure of the tested steel changes from the coarse undistorted equiaxed recrystallized grains to the mixture structure of nano deformed twins and fine recrystallized grains. The strengthening mechanism gradually changes from twin slip to dislocation slip, supplemented by nano twin strengthening, which leads to a rapid increase of yield strength, an increase of yield ratio from 0.36 to 0.49 and a decrease of elongation.

Key words: twinning induced plasticity(TWIP), annealing temperature, grain size, strengthening mechanism

中图分类号:

TG142.13

代永娟, 武祥祥, 李佳坤, 国栋, 王波. 退火温度对Fe-24.38Mn-0.44C TWIP钢组织性能的影响[J]. 金属热处理, 2022, 47(2): 146-152.

Dai Yongjuan, Wu Xiangxiang, Li Jiakun, Guo Dong, Wang Bo. Effect of annealing temperature on microstructure and properties of Fe-24.38Mn-0.44C TWIP steel[J]. Heat Treatment of Metals, 2022, 47(2): 146-152.

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退火温度对Fe-24.38Mn-0.44C TWIP钢组织性能的影响

Effect of annealing temperature on microstructure and properties of Fe-24.38Mn-0.44C TWIP steel

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