Charbel Zgheib
Sheet steels for cold forming of car-body parts.
Rel. Paolo Matteis. Politecnico di Torino, Corso di laurea magistrale in Automotive Engineering (Ingegneria Dell'Autoveicolo), 2021
Abstract
In this thesis problems were faced during the stamping operation (drawing phase exactly) of a 2.5 mm thick steel sheets. The main focus of this thesis is to investigate which is the optimal steel for this stamping operation. In order to avoid the problem of edge fractures in the drawing phase. For this scope three different steel alloys were characterized, DP600, Fe E340, and FB H590. However, the focus material of interest and believed to best suit this application was the DP600 since it has some distinct mechanical properties regarding strength, ductility and strain hardening behavior. The characterization tests and microstructure analysis conducted in the research for all three steel alloys: Chemical analysis, metallographic analysis (grain size, phase constituent, banding…etc.), tensile test.
These characterization tests have been specially selected to reveal the micro and macro characteristics of the studied steel sheets
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