退火温度对LH800空冷强化钢组织与力学性能的影响

doi:10.11896/cldb.21080047

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (13241KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to obtain air-hardening steel with good cold formability, the microstructure evolution and mechanical properties of cold rolled LH800 steel during the batch annealing were studied by means of scanning electron microscopy, electron back scatter diffraction, transmission electron microscopy, and other technical means. The results showed that the ferrite + carbide structure was obtained by annealing between 600 ℃ and 700 ℃, the tensile curve had an obvious yield plateau, and the length of the yield plateau decreased with annealing temperature increasing. As the annealing temperature increased, the nanoscale carbides inside the ferrite grain gradually decreased, the coarse carbides at the grain boundary gradually increased, the volume fraction of low-angle grain boundaries gradually decreased, and the kernel average misorientation (KAM) value gradually decreased. When the annealing temperature exceeded 700 ℃, the microstructure was ferrite + martensite + carbide, and no yield plateau appeaed in the tensile curve. As the annealing temperature continued to increase, the volume fraction of martensite gradually increased, as did the KAM value. The mechanical property analysis showed that, after annealing at 700 ℃ for 4 h, air-hardening steel had the lowest yield strength and tensile strength, the highest elongation, and the best cold-forming performance. Based on the evolution of the microstructure and the nanoscale carbides of cold-rolled LH800 steel during the annealing process, this work revealed the essence of the yield-plateau phenomenon of LH800 steel and obtained its key process parameters of best cold-forming-performance.

Key words： annealing temperature air-hardening steel LH800 microstructure evolution mechanical property nano-scale carbides yield plateau

Published: 10 February 2023 Online: 2023-02-23

CLC number:

TG156.2

Fund:The National Key R & D Program of China (2017YFB0304404).

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LUO Xiang
	MI Zhenli
	WU Yanxin
	YANG Yonggang
	JIANG Haitao
	HU Kuanhui

Cite this article:

LUO Xiang,MI Zhenli,WU Yanxin, et al. Effect of Annealing Temperature on Microstructure and Mechanical Properties of Air-hardening LH800 Steel[J]. Materials Reports, 2023, 37(3): 21080047-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.21080047 OR http://www.mater-rep.com/EN/Y2023/V37/I3/21080047

1 Kang Y L, Zhu G M. Iron & Steel, 2014, 49(12), 1(in Chinese).
康永林, 朱国明.钢铁, 2014, 49(12), 1.
2 Suh D W, Kim S J. Scripta Materialia, 2017, 126, 63.
3 Galán J, Samek L, Verleysen P, et al.Revista de Metalurgia, 2012, 48(2), 118.
4 Lee D, Kim J K, Lee S, et al.Materials Science and Engineering A, 2017, 706, 1.
5 Zhang R, Cao W Q, Peng Z J, et al.Materials Science and Engineering A, 2013, 583, 84.
6 Kalashami A G, Kermanpur A, Najafizadeh A, et al.Materials Science and Engineering A, 2016, 658, 355.
7 Zhang J, Di H, Deng Y, et al.Materials Science and Engineering A, 2015, 627, 230.
8 Grydin O, Rodman D, Schaper M. Steel Research International, 2012, 83(11), 1020.
9 Schaper M, Grydin O, Nürnberger F. HTM Journal of Heat Treatment and Materials, 2013, 68(1), 42.
10 Grydin O, Nuernberger F, Zou Y, et al.Steel Research International, 2014, 85(9), 1340.
11 Wolf L O, Nürnberger F, Rodman D, et al.Steel Research International, 2017, 88(2), 1600107.
12 Grydin O, Andreiev A, Zogaj M, et al.Advanced Engineering Materials, 2019, 21(10), 1900134.
13 Okan P, Bilgehan Ö.Journal of Materials Research and Technology, 2020, 9(5), 11263.
14 Zheng C, Raabe D. Acta Materialia, 2013, 61(14), 5504.
15 Butler J F.Journal of the Mechanics and Physics of Solids, 1962, 10(4), 313.
16 Morrison W B. ASM Trans Quart, 1966, 59(4), 824.
17 Tsuchida N, Tomota Y, Nagai K, et al.Scripta Materialia, 2006, 54(1), 57.
18 Johnson D H, Edwards M R, Chard-Tuckey P. Materials Science and Engineering A, 2015, 625, 36.
19 Schulson E M, Weihs T P, Viens D V, et al.Acta Metallurgica, 1985, 33(9), 1587.
20 Yuan W, Panigrahi S K, Su J Q, et al.Scripta Materialia, 2011, 65(11), 994.
21 Zhao M, Li J C, Jiang Q.Journal of Alloys and Compounds, 2003, 361(1-2), 160.
22 Hutten E, Liang S, Bellhouse E, et al.Journal of Materials Research and Technology, 2021,14, 2061.
23 Chen C Y, Yen H W, Kao F H, et al.Materials Science and Engineering A, 2009, 499(1-2), 162.