Microstructure and mechanical properties of FGBA/BG air cooling bainitic steels containing niobium

Chun Feng; Hong-sheng Fang; Bing-zhe Bai; Yan-kang Zheng

doi:10.1007/s12613-010-0336-2

Volume 17 Issue 4

Aug. 2010

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International Journal of Minerals, Metallurgy and Materials > 2010 > 17(4): 429-434. > DOI: 10.1007/s12613-010-0336-2

Chun Feng, Hong-sheng Fang, Bing-zhe Bai, and Yan-kang Zheng, Microstructure and mechanical properties of FGBA/BG air cooling bainitic steels containing niobium, Int. J. Miner. Metall. Mater., 17(2010), No. 4, pp.429-434. https://dx.doi.org/10.1007/s12613-010-0336-2

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Microstructure and mechanical properties of FGBA/BG air cooling bainitic steels containing niobium

Author Affilications

Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

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This work was financially supported by the National Key Technologies R&D Program of China (No.2004CB619105).

Received: 29 July 2009; Revised: 14 August 2009; Accepted: 27 August 2009; Available Online: 13 June 2021

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Abstract

Abstract

The effect of different Nb additions on the mechanical properties and microstructure evolution of grain boundary allotriomorphic ferrite (F_GBA) / granular bainite (B_G) air cooling bainitic steels was investigated. The results indicate that the tensile strength and yield strength increase by 157 and 97 MPa, respectively with the addition of 0.02wt% Nb. The steel acquires superior strength and toughness with the addition of 0.06wt% Nb. The results of scanning electron microscopy and transmission electron microscopy reveal that the addition of Nb not only refines the size of granular bainite but also increases the volume fraction of granular bainite in FGBA/BG steels. The refinement effect of granular bainite is improved with the increase of Nb content.
- granular bainite,
- microstructure evolution,
- mechanical properties,
- Nb

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[1]	Li Lin, Bao-shun Li, Guo-ming Zhu, Yong-lin Kang, Ren-dong Liu. Effects of Nb on the microstructure and mechanical properties of 38MnB5 steel [J]. International Journal of Minerals, Metallurgy and Materials, 2018, 25(10): 1181-1190. DOI: 10.1007/s12613-018-1670-z
[2]	Yuan Gao, Zong-de Liu, Qi Wang, Yong-tian Wang. Microstructure and mechanical properties of Nb–Mo–ZrB₂ composites prepared by hot-pressing sintering [J]. International Journal of Minerals, Metallurgy and Materials, 2018, 25(7): 824-831. DOI: 10.1007/s12613-018-1631-6
[3]	Xue Yang, Lan Sun, Ji Xiong, Ping Zhou, Hong-yuan Fan, Jian-yong Liu. Effect of aging temperature on the microstructures and mechanical properties of ZG12Cr9Mo1Co1NiVNbNB ferritic heat-resistant steel [J]. International Journal of Minerals, Metallurgy and Materials, 2016, 23(2): 168-175. DOI: 10.1007/s12613-016-1224-1
[4]	Rong-hua Zhang, Ze-an Zhou, Ming-wei Guo, Jian-jun Qi, Shu-hua Sun, Wan-tang Fu. Hot deformation mechanism and microstructure evolution of an ultra-high nitrogen austenitic steel containing Nb and V [J]. International Journal of Minerals, Metallurgy and Materials, 2015, 22(10): 1043-1049. DOI: 10.1007/s12613-015-1166-z
[5]	Jing Zhou, Bao-yu Wang, Ming-dong Huang, Dong Cui. Effect of hot stamping parameters on the mechanical properties and microstructure of cold-rolled 22MnB5 steel strips [J]. International Journal of Minerals, Metallurgy and Materials, 2014, 21(6): 544-555. DOI: 10.1007/s12613-014-0940-7
[6]	Hui-ping Duan, Hong-xia Xu, Wen-huang Su, Yu-bin Ke, Zeng-qian Liu, Hong-hai Song. Effect of oxygen on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr alloy [J]. International Journal of Minerals, Metallurgy and Materials, 2012, 19(12): 1128-1133. DOI: 10.1007/s12613-012-0681-4
[7]	Zhi-gang Wang, Ai-min Zhao, Zheng-zhi Zhao, Jie-yun Ye, Di Tang, Guo-sen Zhu. Microstructures and mechanical properties of C-Mn-Cr-Nb and C-Mn-Si-Nb ultra-high strength dual-phase steels [J]. International Journal of Minerals, Metallurgy and Materials, 2012, 19(10): 915-922. DOI: 10.1007/s12613-012-0647-6
[8]	Yunbo Xu, Yongmei Yu, Xianghua Liu, Guodong Wang. Modeling of microstructure evolution and mechanical properties during hot-strip rolling of Nb steels [J]. International Journal of Minerals, Metallurgy and Materials, 2008, 15(4): 396-401. DOI: 10.1016/S1005-8850(08)60075-4
[9]	Xuemin Wang, Bing Cao, Guifeng Zhou, Chuang Li, Xinlai He. A creep technique for monitoring the aging precipitation in Cu-Nb bainitic steels [J]. International Journal of Minerals, Metallurgy and Materials, 2006, 13(1): 50-53. DOI: 10.1016/S1005-8850(06)60013-3
[10]	Shanwu Yang, Enlong Dong, Huibin Wu, Chengjia Shang, Xuemin Wang, Xinlai He. Microstructure evolution during reheating of a Nb-bearing steel Ⅰ. Metallographic examination [J]. International Journal of Minerals, Metallurgy and Materials, 2005, 12(4): 317-320.