Analytical studies for deep drawing formability of DP590 tailor-welded blanks on warm sheet metal forming

The warm forming process has been widely applied as a promising alternative, which can be applied to the forming of dual phase steel (DP) laser tailor-welded blanks (TWBs) to improve their drawing formability. The deep drawing formability of DP-TWBs on warm sheet forming has been investigated by the square cup. Tensile tests, finite element and experimental analysis on deep drawing of square cup, metallographic tests were used to investigate the formability of DP-TWBs at various temperatures ranging from room temperature to 500 degree C. The results show that the forming temperature has great effect on the formability of DP-TWBs, and the formability is much better when they are formed at the temperature from 400 degree C to 500 degree C.