1998 Volume 48 Issue 10 Pages 507-510
The recrystallization texture in high purity aluminum foils for electrolytic condenser varies extensively with the conditions of cold rolling and heat treatment. The formation behavior of cube texture has been found to depend distinctly on the iron content less than 0.01 mass%, using hot rolled plates containing 7 ppm (4N) and 35 ppm Fe (3N). It has been elucidated that sharp cube texture can be developed in the 4N foils easily by high reduction cold rolling and high temperature final annealing, the combined process of an intermediate annealing at 260°C and a low reduction rolling prior to final annealing is indispensable to develop the cube texture and use of small diameter rolls in the final stage of rolling is effective to suppress the R component in the 3N foils, and the intermediate annealing temperature at 260°C is too high for the 4N foils.
