Experimental Investigation on Micro Deep Drawing of Stainless Steel Foils with Different Microstructural Characteristics

Abstract In the present work, austenitic stainless steel (ASS) 304 foils with a thickness of 50 µm were first annealed at temperatures ranging from 700 to 1100 ? for 1 h obtain different microstructural characteristics. Then effects characteristics on formability ASS and quality drawn cups using micro deep drawing (MDD) studied, mechanism involved was discussed. The results show that as-received foil has poor cannot be used form cup MDD. Serious wrinkling problem occurs cup, height profile distribution mouth symmetry is quite non-uniform when annealing temperature ?. At 900 950 ?, are both characterized very few wrinkles, profile, uniform mouths cups. becomes increasingly significant further increase optimal obtained in this study reducing generation wrinkling, therefore improving With non-optimized microstructure, compressive stress circumferential direction inhomogeneous, which thought cause occurrence localized deformation till during