New Multiphase CP and DP 1000 MPa strength level grades for improved performance after hot forming

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ISSN: 1757-8981
DOI: 10.1088/1757-899X/651/1/012092
Publication date
2019-11-26
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Abstract
Pure martensitic steels have after hot forming limited performance in terms of rest ductility which limits the application in crash relevant parts. New steel grades were designed in the EU project HOTFORM including the corresponding process routes. These steel grades have ferritic-martensitic dual phase (DP) and martensitic-bainitic complex phase (CP) microstructures after hot forming process. The laboratory tests show an improved formability after hot forming. The basic concepts of the new alloys are explained. Furthermore, for validation of upscaling purposes a semi-industrial test is carried out and the results are discussed. The main application is for vehicle safety. This is evaluated by comparing the crash performance of these hot formed grades with cold rolled DP1000 and CP1000 for crash cans in a drop tower test.
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Publisher Copyright: © Published under licence by IOP Publishing Ltd.
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Pure martensitic steels , Crash relevant parts , Vehicle safety , Hot forming process , Pure martensitic steels , Crash relevant parts , Vehicle safety , Hot forming process , General Materials Science , General Engineering , SDG 3 - Good Health and Well-being , Funding Info , The research leading to these results was carried out in the framework of HOTFORM project with a financial grant of the Research Programme RFCS (Research Funds for Coal and Steel) under grant agreement (RFSR-CT-2015-00017). , The research leading to these results was carried out in the framework of HOTFORM project with a financial grant of the Research Programme RFCS (Research Funds for Coal and Steel) under grant agreement (RFSR-CT-2015-00017).
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Lahaije , C T W , Rana , R , Sunderkoetter , C , Pérez , I , Arribas , M , Aranguren , I , Caro , D D , Pérez , I & Aranguren , I 2019 , ' New Multiphase CP and DP 1000 MPa strength level grades for improved performance after hot forming ' , IOP Conference Series: Materials Science and Engineering , vol. 651 , no. 1 , 012092 , pp. 12092 . https://doi.org/10.1088/1757-899X/651/1/012092