Process for producing an aluminum alloy rolled material for forming process comprising an aluminum alloy excellent in bending workability and anti-ridging property

摘要

The present invention relates to a process for homogenizing an ingot made of an aluminum alloy having a predetermined composition, a step for homogenizing the aluminum alloy after the homogenization, and an average cooling rate of 1/4 part of the ingot between 500 ° C and 320 ° C of 20 ° C / To 2,000 占 폚 / h, starting the hot rolling at 370 占 폚 to 440 占 폚, and winding the hot-rolled aluminum alloy at 310 to 380 占 폚. And a step of holding the aluminum alloy after the cooling step at a preheat heating temperature set within a range of 370 ° C to 440 ° C for at least 0.17 hours before hot rolling.