Hot forming limit curves for numerical press hardening simulation of AISI 420C

authored by: Bernd Arno Behrens, Johanna Uhe, Hendrik Wester, Eugen Stockburger
Abstract: A possible alternative to the established press hardening steel 22MnB5 are hot formed martensitic chromium steels. Both strength and ductility of the martensitic chromium steels can reach very high values with appropriate heat treatments. Therefore, car body parts with high crash safety can be produced by hot forming martensitic chromium steels. To identify the formability of a sheet metal, forming limit curves are state of the art. Conventional forming limit curves are recorded at room temperature and do not adequately describe the forming capacity for hot sheet metal forming as it strongly depends on temperature. Therefore, in this paper, an experimental-numerical method for determining quasi-isothermal FLC at high forming temperatures is applied to the martensitic chromium steel AISI 420C (X46Cr13) for forming temperatures between 750-1,050 °C according to its process route. The results show an increase of the formability with rising forming temperature with the highest at 1,050 °C.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Type: Conference contribution
Pages: 350-355
No. of pages: 6
Publication date: 25.08.2020
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanics of Materials, Metals and Alloys, Surfaces, Coatings and Films
Electronic version(s): https://doi.org/10.37904/metal.2020.3667 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{4028fde77fa44212a3ec3308c31ff682,
title = "Hot forming limit curves for numerical press hardening simulation of AISI 420C",
abstract = "A possible alternative to the established press hardening steel 22MnB5 are hot formed martensitic chromium steels. Both strength and ductility of the martensitic chromium steels can reach very high values with appropriate heat treatments. Therefore, car body parts with high crash safety can be produced by hot forming martensitic chromium steels. To identify the formability of a sheet metal, forming limit curves are state of the art. Conventional forming limit curves are recorded at room temperature and do not adequately describe the forming capacity for hot sheet metal forming as it strongly depends on temperature. Therefore, in this paper, an experimental-numerical method for determining quasi-isothermal FLC at high forming temperatures is applied to the martensitic chromium steel AISI 420C (X46Cr13) for forming temperatures between 750-1,050 °C according to its process route. The results show an increase of the formability with rising forming temperature with the highest at 1,050 °C.",
keywords = "Experimental-numerical material characterisation, Hot FLC, Hot sheet metal forming, Martensitic chromium steel",
author = "Behrens, {Bernd Arno} and Johanna Uhe and Hendrik Wester and Eugen Stockburger",
note = "Funding Information: The authors gratefully acknowledge the support of the German Research Foundation (DFG) within the project 385989694. Further Outokumpu Nirosta GmbH is thanked for providing the martensitic chromium steel AISI 420C for the investigations. ; 29th International Conference on Metallurgy and Materials, METAL 2020 ; Conference date: 20-05-2020 Through 22-05-2020",
year = "2020",
month = aug,
day = "25",
doi = "10.37904/metal.2020.3667",
language = "English",
series = "Proceedings of the conference were published in Web of Science and Scopus",
publisher = "TANGER Ltd.",
pages = "350--355",
booktitle = "Proceedings 29th International Conference on Metallurgy and Materials",
}