MATEC Web of Conferences
Volume 21, 20154th International Conference on New Forming Technology (ICNFT 2015)
|Number of page(s)||7|
|Published online||10 August 2015|
Forming and quenching behaviours in hot stamping of thin quenchable sheets
Toyohashi University of Technology, Department of Mechanical Engineering, 1-1 Hibarigaoka, Tenpaku, Toyohashi, Aichi, Japan
a Corresponding author: e-mail: email@example.com
A thin aluminium-coated quenchable steel sheet was hot-stamped to investigate the effect of the thickness. The sheets having 0.6, 1.0 and 1.6 mm in thickness were heated at 900 ∘C by a furnace and formed after 7 s from the furnace. The cooling rates of 0.6 mm and 1.0 mm in thickness from 900 ∘C to 400 ∘C under air cooling were 20.9 ∘C/s and 13.6 ∘C/s, respectively. The hardness of the air-cooled sheets having 1.0 mm in thickness was 300 HV1, whereas that of the sheet having 0.6 mm in thickness was 380 HV1 because of the high cooling rate. The Vickers hardness of the U-bent sheets of 0.6 and 1.0 mm after 7 s from the furnace without the holding time at the bottom dead centre were 500 and 430 HV1, respectively.
© Owned by the authors, published by EDP Sciences, 2015
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