析出強化與孿晶強化在Fe-24Mn-3Si-3Al TWIP鋼退火過程中的作用機制

楊永剛; 米振莉; 江海濤; 李輝; 徐梅

doi:10.13374/j.issn2095-9389.2017.06.006

析出強化與孿晶強化在Fe-24Mn-3Si-3Al TWIP鋼退火過程中的作用機制

doi: 10.13374/j.issn2095-9389.2017.06.006

1) 北京科技大學工程技術研究院, 北京 100083
2) 煙臺南山學院工學院, 煙臺 265700

基金項目:

國家重點研發計劃資助項目(2016YFB0101605)

詳細信息

中圖分類號: TG142.1
計量
- 文章訪問數: 884
- HTML全文瀏覽量: 354
- PDF下載量: 27
- 被引次數: 0
出版歷程
- 收稿日期: 2016-10-09

Mechanism of precipitation strengthing and twinning strengthing in annealing process of Fe-24Mn-3Si-3Al TWIP steel

1) Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China
2) College of Engineering, Yantai Nanshan University, Yantai 265700, China

摘要

摘要: 對Fe-24Mn-3Si-3Al TWIP鋼在不同退火工藝下進行力學性能測試,采用掃描電子顯微鏡(SEM)、能譜儀(EDS)和透射電子顯微鏡(TEM)觀察鋼的微觀組織形貌.結果表明:隨著退火溫度和保溫時間的變化,TWIP鋼的力學性能并不符合常規的單調上升或下降的規律,而在退火溫度為800℃、保溫10 min和退火溫度為900℃、保溫20 min時發生波動.退火溫度為800℃、保溫10 min條件下,鋼的主要強化機制為析出強化,析出相(Fe,Mn)₂₃C₆的增多導致屈服和抗拉強度升高;退火溫度為900℃、保溫20 min條件下,鋼中的析出相并未有明顯的變化,而二次孿晶的產生及孿晶相互交割成為抗拉強度增加的主導因素.
- TWIP 鋼 /
- 退火 /
- 碳化物析出 /
- 二次孿晶 /
- 強化機制
Abstract: The mechanical properties and strengthening mechanism of Fe-24Mn-3Si-3Al TWIP steels were investigated as a function of annealing process. The microstructures of the samples were analyzed by transmission electron microscopy, scanning electron microscopy, energy disperse spectroscopy. The experimental results indicate that as the annealing temperature and the holding time change, the mechanical properties of TWIP steel do not rise or fall monotonously, as would be conventionally. The mechanical properties change in the annealing processes of annealing temperature 800℃ for 10 min and 900℃ for 20 min. The strengthening mechanism is mainly dispersion strengthening in the case of annealing process of 800℃ annealing temperature for 10 min, and an increase in the precipitation of (Fe, Mn)₂₃C₆ leads to better mechanical properties. However, in the case of annealing process of 900℃ for 20 min, the precipitation of (Fe, Mn)₂₃C₆ does not change obviously, but many twinning systems are initiated and secondary twin and twin delivery are observed, which result in an increase in the ultimate tensile strength.
- TWIP steel /
- annealing /
- carbide precipitation /
- secondary twin /
- strengthening mechanism

HTML全文

參考文獻(6)

[1]	Grässel O, Krüger L, Frommeyer G, et al. High strength Fe-Mn-(Al, Si) TRIP/TWIP steels development properties application. Int J Plast, 2000, 16(10):1391
[4]	Mi Z L, Tang D, Jiang H T, et al. Effects of annealing temperature on the microstructure and properties of the 25Mn-3Si-3Al TWIP steel. Int J Miner Metall Mater, 2009, 16(2):154
[7]	Kang S, Jung Y S, Jun J H, et al. Effects of recrystallization annealing temperature on carbide precipitation, microstructure, and mechanical properties in Fe-18Mn-0.6C-1.5Al TWIP steel. Mater Sci Eng A, 2010, 527(3):745
[8]	Santos D B, Saleh A A, Gazder A A, et al. Effect of annealing on the microstructure and mechanical properties of cold rolled Fe-24Mn-3Al-2Si-1Ni-0.06C TWIP steel. Mater Sci Eng A, 2011, 528(10):3545
[13]	Gladman T. Precipitation hardening in metals. Mater Sci Technol, 1999, 15(1):30
[16]	Scot C, Remy B, Collet J L, et al. Precipitation strengthening in high manganese austenitic TWIP steels. Int J Mater Res, 2011, 102(5):538