Speaker
Description
The decarbonization of steel sheet metal production process introduces new challenges for the automotive part production process. Especially, the recyclability component, the efforts to increase the steel scrap in the primary steel making process beyond the levels currently used, produces increased variability intervals for certain residual elements outside the levels typically found in the iron ore-based chemistry liquid steel making. The chemistry variability produces small but still detectable mechanical properties deviations of the sheet metal products like plastic work hardening, anisotropy and total elongation. In this paper a study of material variability effect on part make-ability of several automotive parts currently produced with highly formable materials are investigated. New material parameter variation intervals are generated from data variability of mild steel grades with different degrees of formability. The study shows that material variability studies of existing forming processes provide an efficient way to gain insights in material suitability in relation to forming process control challenges and potential part design limitations.