The invention discloses a preparation method for producing deep-drawn cold-formed medicinal
aluminum foil with a cast-rolling billet in a short process. The method sequentially includes the steps of
smelting, cast rolling, cold rolling, homogeneous high-
temperature treatment, intermediate rolling, slitting shear trimming, intermediate annealing, finish rolling, foil rolling, coil combining, finished product rolling, parting-off, and furnace loading for annealing. Raw materials of the deep-drawn cold-formed medicinal
aluminum foil include an aluminum
alloy and an Al-Fe intermediate
alloy with amass content of 20% or a Fe-containing additive with a
mass content of 75%, and elements in the aluminum
alloy include 0.025-0.10% of Si, 1.25-1.65% of Fe, 0.001-0.10% of Cu, less than 0.05% of Mn, less than 0.05% of Mg, less than 0.05% of Cr, less than 0.05% of Zn, 0.01-0.04% of Ti and the balance A. By means of the recorded preparation method, final product detection shows that the end face layer offset after parting-off is less than or equal to 0.5 mm, the width of the corrugated edge is 3 mm, and the
peak value is 1 mm; the surface cleanliness
dyne value is greater than or equal to 65 dyn; as for mechanical properties, the tensile strength is 80-115 MPa, the elongation rate is 23%, and the
yield ratio is 42%; and the Erichsen value is 5.0 mm, the
deep drawing height is 2.0 mm, the surface
hardness value is 22 HV, the
bursting strength is 400-800 Ka, and the surface swabbing reaches level A.