Abstract
Bake hardenability steel sheets are used increasingly more for automotive outer panels, because they exhibit high yield strength after painting the baking treatment while they have a good formability in the press stamping stage. Bake hardening utilizes the phenomenon of strain aging to provide an increase in the yield strength of formed components. So high carbon solubility levels increase the bake hardening response but reduce the room temperature aging resistance. This study is on the effect of annealing conditions such as soaking temperature, rapid cooling start temperature, cooling rate on BH(Bake hardenability), AI(Aging Index), YP-El(Yield point Elongation) and other mechanical properties.
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