The need to lower the weights of automotive vehicle and to improve the safety of cars has resulted
in the development of high strength steels such as TRIP(Transformation Induced Plasticity) and DP (Dual
Phase) steel. It is well known that the higher strength of steel shows the poorer press formability. Among
the high strength steels, DP steel shows several good characteristics such as low yield ratio, high initial n
value, high elongation, high bake hardenability and anti-aging property. However, there’s a certain limit in
application of DP steels to the automotive panel parts because their poor deep drawbility caused by
martensite. In this study, the effect of alloying elements on the deep drawability and recrystallization texture
in TS 440MPa grade DP steel with 0.015~0.02% carbon has been investigated on the base of SEM, TEM, XRD
and EBSD analysis.