RT Conference Proceedings
T1 Phase transformation and microstructural behavior of new steel grades for hot sheet stamping
A1 Bruschi, Stefania
A1 Ghiotti, Andrea
A1 Valoppi, Beatrice
A1 Puerta-Velasquez, Juan
A1 Drillet, P.
A1 Arribas, M.
A1 Aranguren, I.
A1 Clobes, J.
AB Since the last few years several researches have focused in proposing new approaches to decrease the energy impact of the hot sheet stamping process. Among them, one possibility is to use steel grades characterized by a lower austenitization temperature in order to reduce the heating energy required for the process, but still maintaining the steel quenchability under the investigated process conditions. In the paper, the behaviour of two new steel grades developed by ArcelorMittal and Tecnalia, and devoted to hot stamping is investigated in terms of transformation kinetics and microstructural behaviour. An extensive dilatometric analysis, performed by using a modified axial extensometer, permitted to evaluate the steel kinetics of phase transformation as a function of the applied cooling rate, amount of strain and strain rate. The micro-hardness of water and die quenched samples of the investigated steel grades was measured and their microstructure analyzed by means of optical and scanning electron microscopy to evaluate the characteristics of the formed martensite and the possible phenomenon of autotempering.
PB Trans Tech Publications Ltd
SN 9783038351061
SN 1013-9826
YR 2014
FD 2014
LK https://hdl.handle.net/11556/2272
UL https://hdl.handle.net/11556/2272
LA eng
NO Bruschi , S , Ghiotti , A , Valoppi , B , Puerta-Velasquez , J , Drillet , P , Arribas , M , Aranguren , I & Clobes , J 2014 , Phase transformation and microstructural behavior of new steel grades for hot sheet stamping . in Material Forming ESAFORM 2014 . Key Engineering Materials , vol. 611-612 , Trans Tech Publications Ltd , pp. 1054-1061 , 17th Conference of the European Scientific Association on Material Forming, ESAFORM 2014 , Espoo , Finland , 7/05/14 . https://doi.org/10.4028/www.scientific.net/KEM.611-612.1054
NO conference
DS TECNALIA Publications
RD 31 jul 2024