Effect of Cooling Rate and Austenite Deformation on Hardness and Microstructure of 960MPa High Strength Steel

Yang Xiong; Yu Wei; Tang Di; Shi Jiaxin; Li Yuqian; Fan Jia; Mei Donggui; Du Qiming

doi:10.1515/secm-2020-0045

Science and Engineering of Composite Materials (Dec 2020)

Effect of Cooling Rate and Austenite Deformation on Hardness and Microstructure of 960MPa High Strength Steel

Yang Xiong,
Yu Wei,
Tang Di,
Shi Jiaxin,
Li Yuqian,
Fan Jia,
Mei Donggui,
Du Qiming

Affiliations

Yang Xiong: Institute of Engineering Technology, University of Science and Technology Beijing, Beijing100083, China
Yu Wei: Institute of Engineering Technology, University of Science and Technology Beijing, Beijing100083, China
Tang Di: Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing100083, China
Shi Jiaxin: Institute of Engineering Technology, University of Science and Technology Beijing, Beijing100083, China
Li Yuqian: Hesteel Group Company Limited Handan branch, Technology Center, Handan, Hebei, China, 056015
Fan Jia: Hesteel Group Company Limited Handan branch, Technology Center, Handan, Hebei, China, 056015
Mei Donggui: Hesteel Group Company Limited Handan branch, Technology Center, Handan, Hebei, China, 056015
Du Qiming: Hesteel Group Company Limited Handan branch, Technology Center, Handan, Hebei, China, 056015

DOI: https://doi.org/10.1515/secm-2020-0045
Journal volume & issue: Vol. 27, no. 1
pp. 415 – 423

Abstract

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In order to develop 960MPa grade high strength steel, the effects of cooling rate and austenite deformation on the hardness and the microstructure of high strength steel has been studied by Scanning Electron microscope (SEM), Transmission Electron Microscope (TEM), Gleeble-3500 thermal simulation testing machine and T2500 Vickers hardness tester. The results show that only when the cooling rate was higher than 10∘C/s and the final cooling temperature was lower than 250∘C, the microstructure mainly consists of martensite, and the strength of high strength steel could be above 960MPa; and austenite deformation could effectively refine the width of martensite lath, thus improving the strength and toughness.

Published in Science and Engineering of Composite Materials

ISSN: 0792-1233 (Print); 2191-0359 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.degruyter.com/view/j/secm

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