New generation ultrahigh strength boron steel for automotive hot stamping technologies

Taylor, T. and Fourlaris, G. and Evans, P. and Bright, G. (2013) New generation ultrahigh strength boron steel for automotive hot stamping technologies. Materials Science and Technology, 30 (7). pp. 818-826. ISSN 0267-0836

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Abstract

The automotive industry is under increasing pressure to: (1) reduce the weight of vehicles and (2) improve crash performance. ‘Hot stamped’ mild carbon–manganese–boron steel 22MnB5 has become common place in the body structure of the European vehicle over the past decade. The ultrahigh strength martensitic microstructure resulting from hot stamping (proof strength ∼1200 MPa and ultimate tensile strength ∼1500 MPa) enables down gauging while not compromising crash performance. However, with demands for yet higher strength in the final component so to enable further down gauging, novel grades must be developed. In this paper, development of the novel grade 38MnB5 was reported. Following hot stamping, 38MnB5 demonstrated proof strength in excess of 1400 MPa and ultimate tensile strength in excess of 2000 MPa. Owing to the immense strength, the novel grade 38MnB5 was considered to offer significant down gauging and weight reduction opportunities to the automotive industry.

Item Type: Article
Uncontrolled Keywords: Hot stamping, Boron steel, Martensite
Subjects: H100 General Engineering
H700 Production and Manufacturing Engineering
J500 Materials Technology not otherwise specified
Divisions: Faculty of Computing, Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment
REF UoA Output Collections > REF 2021 UoA12: Engineering
Depositing User: Euan Scott
Date Deposited: 28 Jan 2019 09:56
Last Modified: 28 Jan 2019 09:56
URI: http://www.open-access.bcu.ac.uk/id/eprint/6942

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