Precipitation law of carbide containing aluminum in Fe-Mn-Al-C lightweight steel

doi:10.13251/j.issn.0254-6051.2022.08.011

Abstract

Abstract: Precipitation law of aluminous carbide containing aluminum-K phase in the Fe-18Mn-0.8C-0.3Si-xAl(x=3, 6, 9) lightweight steel and its effect on properties under different cooling rates and heating temperatures were investigated by means of OM, SEM, XRD, TEM, EPMA, tensile test and Vickers hardness test. The results show that the factors affecting the precipitation of K phase include Al content, cooling rate and heating temperature. In the case of furnace cooling, when the cooling rate is about 0.020 ℃/s, K phase in lightweight steel with Al content of more than 9% is capable of precipitating on the austenite boundary; K phase is capable of precipitating below 900 ℃, while the heating temperature is higher than 900 ℃, K phase no longer precipitates. The precipitated K phase will affect the mechanical properties of lightweight steel and sharply reduce the plasticity of the lightweight steel. Therefore, the thick K phase should be avoided from precipitation in steel during production, which can be avoided by using faster cooling rate and higher heating temperature(>900 ℃).

Key words: Fe-Mn-Al-C lightweight steel, carbide containing aluminum, precipitation law, mechanical properties

CLC Number:

TG162.83

Meng Jingzhu, Liu Rendong, Guo Jinyu, Xu Rongjie, Wang Keqiang, Pan Yong. Precipitation law of carbide containing aluminum in Fe-Mn-Al-C lightweight steel[J]. Heat Treatment of Metals, 2022, 47(8): 71-76.

References

[1]李扬, 刘汉武, 杜云慧, 等. 汽车用先进高强钢的应用现状和发展方向[J]. 材料导报, 2011, 25(13): 101-104.
Li Yang, Liu Hanwu, Du Yunhui, et al. Applications and developments of AHSS in automobile industry[J]. Materials Reports, 2011, 25(13): 101-104.
[2]康永林. 汽车轻量化先进高强钢与节能减排[J]. 钢铁, 2008, 43(6): 1-7.
Kang Yonglin. Lightweight vehicle, advanced high strength steel and energy-saving and emission reduction[J]. Iron and Steel, 2008, 43(6): 1-7.
[3]陈铭年, 潘翔, 梁霖锋. 汽车轻量化是节能环保的有效措施[J]. 福建工程学院学报, 2009, 6(12): 26-29.
Chen Mingnian, Pan Xiang, Liang Linfeng. Automobile lightening for energy conservation and environmental protection[J]. Journal of Fujian University of Technology, 2009, 6(12): 26-29.
[4]丁桦, 杨平. 高锰TRIP/TWIP钢变形行为的研究进展[J]. 材料与冶金学报, 2010, 9(4): 265-272.
Ding Hua, Yang Ping. Research in deformation behaviors of high Mn TRIP/TWIP steels[J]. Journal of Materials and Metallurgy, 2010, 9(4): 265-272.
[5]Choi K, Seo C H, Lee H, et al. Effect of aging on the microstructure and deformation behavior of austenite base lightweight Fe-28Mn-9Al-0.8C steel[J]. Scripta Materialia, 2010, 63(10): 1028-1031.
[6]Seol J B, Raabe D, Choi P, et al. Direct evidence for the formation of ordered carbides in a ferrite-based low-density Fe-Mn-Al-C alloy studied by transmission electron microscopy and atom probe tomography[J]. Scripta Materialia, 2013, 68(6): 348-353.
[7]Gutierrez-Urrutia I, Raabe D. Influence of Al content and precipitation state on the mechanical behavior of austenitic high-Mn low-density steels[J]. Scripta Materialia, 2013, 68(6): 343-347.
[8]Koyama M, Springer H, Merzlikin S V, et al. Hydrogen embrittlement associated with strain localization in a precipitation-hardened Fe-Mn-Al-C light weight austenitic steel[J]. International Journal of Hydrogen Energy, 2014, 39(9): 4634-4646.
[9]杨旗, 王俊峰, 丛郁, 等. 轻质钢的研究进展(二)——铁素体-奥氏体双相轻质钢和奥氏体轻质钢[J]. 宝钢技术, 2015(4): 1-8.
Yang Qi, Wang Junfeng, Cong Yu, et al. State of knowledge on lightweight steels(Part II)-Ferrite-austenite dual-phase lightweight steels and austenitic lightweight steels[J]. Baosteel Technology, 2015(4): 1-8.
[10]冯浩, 刘仁东, 乔军, 等. Al 含量对高锰轻质钢组织和力学性能的影响[J]. 金属热处理, 2016, 41(11): 62-65.
Feng Hao, Liu Rendong, Qiao Jun, et al. Effect of Al content on microstructure and mechanical properties of high-Mn light-weight steels[J]. Heat Treatment of Metals, 2016, 41(11): 62-65.
[11]赵超, 宋仁伯, 张磊峰, 等. 一种 Fe-Mn-Al-C 低密度高强钢的组织性能研究[C]//第十届中国钢铁年会暨第六届宝钢学术年会论文集. 2019: 1-5.
Zhao Chao, Song Renbo, Zhang Leifeng, et al. Microstructure and mechanical properties of a low-density high-strength Fe-Mn-Al-C steel[C]//Proceedings of the 10^th CSM Steel Congress and the 6^th Baosteel Biennial Academic Conference. 2019: 1-5.
[12]郑启泰. 四方晶系Patterson 法多解的一般形式[J]. 物理学报, 1981(7): 54-61.

[1]	Yang Xiaobin, Dong Ji, Tian Chunying, Ning Baoqun, Zhao Qian, Qiao Zhixia, Liu Yongchang. Effect of magnetic field on tempered microstructure and mechanical properties of 25CrMo48V ultra-high strength steel [J]. Heat Treatment of Metals, 2022, 47(8): 24-33.
[2]	Jiang Yue, Zhu Baixiang, Li Xiuming, Tan Yaping. Microstructure and mechanical properties of CrFeCoNiB_0.05Ti_x high-entropy alloy [J]. Heat Treatment of Metals, 2022, 47(8): 58-62.
[3]	Liu Dejia, Zha Xuean, Wang Weixiong, Tang Yanchuan, Zhao Longzhi, Xu Hongming. Microstructure and properties of 304/Q235 clad plate joints with high-entropy filler metals [J]. Heat Treatment of Metals, 2022, 47(8): 63-70.
[4]	Chi Haitao, Liu Fubing, Hu Xiaoguang. Mechanical properties and corrosion resistance of 7A41 aluminium alloy [J]. Heat Treatment of Metals, 2022, 47(8): 88-94.
[5]	Zhang Mingyu, Yun Xinbing, Fu Hongwang. Effect of cooling method of heat treatment on microstructure and properties of TC10 titanium alloy [J]. Heat Treatment of Metals, 2022, 47(8): 98-104.
[6]	Song Ninghong, Lin Chao, Bi Wenzhen, Wang Wurong, Wei Xicheng. Effect of tempering time on microstructure and properties of 1800 MPa hot stamping steel [J]. Heat Treatment of Metals, 2022, 47(8): 112-117.
[7]	Liu Lin, Xu Haiwei, Li Hongbin, Han Yun, Tian Yaqiang, Zheng Xiaoping, Chen Liansheng. Effect of intercritical continuous annealing temperature on microstructure and properties of Q&P980 steel [J]. Heat Treatment of Metals, 2022, 47(8): 177-181.
[8]	Liu Xiaowei, Zhou Guangjie, Tan Xiaobin. Tempering for direct quenched 800 MPa grade hydropower steel [J]. Heat Treatment of Metals, 2022, 47(8): 228-231.
[9]	Liao Jia, Fu Tao, Wang Xiaowei, Yu Shengfeng, Wang Ruiqi, Peng Fei. Influence of tempering temperature on microstructure and mechanical properties of forged 35CrMo steel with large-scale [J]. Heat Treatment of Metals, 2022, 47(8): 232-236.
[10]	Yang Laixia, Li Jiale, Xu Chao, Yang Wenxuan. Effect of scanning speed on mechanical properties and microstructure of ER630 wire repair layer by direct laser deposition [J]. Heat Treatment of Metals, 2022, 47(8): 271-278.
[11]	Jiang Chao, Jia Dongyong, Zhou Zhiyong, Tian Zheng, Guo Xingye, Wang Zhe, Han Xiuzhu. Heat treatment and space environment performance of high strength aluminum alloy parts by selective laser melting [J]. Heat Treatment of Metals, 2022, 47(7): 1-8.
[12]	Tong Rui, Yu Xingfu, Liu Yongbao, Xia Yunzhi, Su Yong, Jin Yingli. Comparative analysis on properties of 8Cr4Mo4V steel for bearing after vacuum gas quenching and isothermal salt bath quenching [J]. Heat Treatment of Metals, 2022, 47(7): 9-14.
[13]	Tian Ziwei, Yao Yanxin, Liu Jiaxing, Wang Zhiyi, Hu Zhangquan, Jiang Bo. Effect of cooling rate on microstructure and properties of microalloyed medium carbon non-quenched and tempered steel [J]. Heat Treatment of Metals, 2022, 47(7): 27-33.
[14]	Wei Xiaoyuan, Wei Wu, Guo Xiao, Cheng Zhiqiang, Wen Shengping, Shi Wei, Huang Hui. Effect of annealing treatment on microstructure and properties of Er-containing Al-6Mg-1Mn alloy [J]. Heat Treatment of Metals, 2022, 47(7): 47-51.
[15]	Wang Hua, Wang Zeyu, Song Jiaming, Qu Zonghong, Lai Yunjin, Liang Shujin. Effect of solution treatment on microstructure and properties of powder metallurgy GH4099 alloy [J]. Heat Treatment of Metals, 2022, 47(7): 86-91.