VERBUNDBLECH ZUM TIEFZIEHEN

摘要

Composite sheet for deep drawing comprises main sheet (1) and a thicker overlying plate (2) adhered to an area of main sheet as reinforcement. Adhesive system (3) is selected, applied and, if necessary, reticulated to satisfy the following intrinsic criteria over the deep drawing temperature range: crack extension force in traction mode 1500 J/m<2>; crack extension force in shear mode 2000 J/m<2>. The adhesive system (3) is also selected in order to ensure that the break deformation is above that of the metal of the main sheet (1) and that of the overlying plate (2), preferably by at least 40%. An Independent claim is given for a process of fabricating the above composite sheet for deep drawing.