ALUMINIUM ALLOY CONTAINING MAGNESIUM AND SILICON

摘要

The invention relates to a heat treatable Al-Mg-Si aluminium alloy which after shaping has been submitted to an ageing process, wherein the ageing after cooling of the extruded product is performed in a first stage in which the extrusion is heated with a heating rate above 30 DEG C/hour to a temperature between 100 - 170 DEG C, a second stage in which the extrusion is heated with a heating rate between 5 and 50 DEG C/hour to the final hold temperature between 160 and 220 DEG C and in that the total ageing cycle is performed in a time between 3 and 24 hours.