Process for the preparation of a plate alumu00ecnio alloy with improved flexibility and the plate of alloy of alumu00ecnio it produced

摘要

Process for the preparation of a plate alumu00ecnio alloy with improved flexibility and the plate of alloy of alumu00ecnio it produced.The present invention relates to a process for the production of a plate of aluminum alloy having excellent flexibility for use in forming panels for automobiles.It is used an aluminium alloy comprising from 0.5 to 0.75% by weight of Mg, 0.7 - 0.85% by weight of Si, 0.15 - 0.35% by weight of Mn, 0.1 - 0.3% by weight of Fe, optionally 0.2 0,4% by weight of Cu and the balance being Al and incidental impurities, and this alloy is melted into ingots by semi continuous casting.The ingot is subjected to hot rolling and cold rolling, followed by heat treatment in a solution of the plate formed.This material plate is then pre aged cooled rapidly from an initial temperature of pre aging of at least 80 198 C to room temperature at a rate of coolsGrowth of more than 5 198 C / hour.