退火工艺对冷轧中锰中铝低密度钢组织与性能的影响

doi:10.11896/cldb.20080088

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Abstract Lightweight, strengthening and toughening of iron and steel materials are the key research directions of advanced metal materials. Based on the inherent alloy elements of steel, the comprehensive properties of steel can be improved and the weight of parts can be reduced by adding some strengthening elements and low density elements. With the rapid development of automobile industry, the development and application of lightweight automobile steel are more and more extensive. At present, Fe-Mn-Al-C low density steel mainly uses for reference the research ideas of composition design, heat treatment process, microstructure and properties controlling of medium/high manganese steel to form high strength and toughness steel with excellent performance and reasonable cost. According to the composition characteristics of medium manganese medium aluminum low density steel (12.4wt% Mn, 4.7wt% Al, 0.1wt% C), the stability and structure of the matrix were controlled by annealing the cold rolled samples near A_c1 and A_c3. The results show that the austenite stability is closely related to the original microstructure, annealing condition and tensile stress, and the transformation law follows the of austenite → ε-martensite → α' martensite, the excellent properties of tensile strength and elongation of 854 MPa, 44.3% and strength plastic product of 37.8 GPa·% are obtained after annealing at 850 ℃ for 15 min.

Key words： low-density steel annealing process cold rolling austenite stability mechanism of strength and toughness

Published: 07 September 2021

CLC number:

TG142.1

Fund:National Natural Science Fund (51674004).

About author:: Xiaofeng Zhangis an associate professor and master tutor in School of Metallurgical Engineering, Anhui University of Technology. He graduated from Wuhan University of Science and Technology in 1998. He got his Ph.D. degree in material processing engineering in Huazhong University of Science and Technology in July 2008. He worked in Anhui University of Technology in August at the same year. During his tenure, he conducted postdoctoral research in Nanjing University of Science and Technology from 2013 to 2016. He is mainly engaged in the research of the control of microstructure and properties of advanced automobile steel materials. In recent years, more than 30 papers have been published in the field of advanced steel materials.

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	ZHANG Xiaofeng
	LI Jiaxing
	WAN Yaxiong
	WU Xuejun
	HUANG Zhenyi

Cite this article:

ZHANG Xiaofeng,LI Jiaxing,WAN Yaxiong, et al. Effect of Annealing Process on Microstructure and Properties of Cold Rolled Medium Manganese Medium Aluminum Low Density Steel[J]. Materials Reports, 2021, 35(16): 16099-16103.

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http://www.mater-rep.com/EN/10.11896/cldb.20080088 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16099

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