Investigation on Formability of AISI 304 Circular Cups by Warm Deep Drawing.

Deep drawing is one of the sheet metal forming processes used widely in industries like automobile, aerospace etc. In drawing operation, the limiting draw ratio (LDR) is used as an index of drawability of a material. In this investigation, stainless steel AISI 304 grade blanks of 1.0 mm thickness with different diameters are drawn into a circular cups in single stage. The experiments were conducted at room temperature as well as at temperatures 100 degrees C, 200 degrees C, and 300 degrees C. The LDR values obtained in each condition were analyzed. The experimental results show that there is a significant improvement in LDR values by warm working.