ALUMINIUM ALLOYS

摘要

The aluminum alloy AA 6063 containing 0.2-0.6% Si and 0.45-0.9% Mg is widely used for the production of extrusions. By incorporating 0.02-0.3% Mn or 0.02-0.3% Mo in AA 6063 alloy in which the Fe content is controlled to lie in the range of 0.1-0.25% Fe and is related to the Si content in excess of that required to convert all the Mg content to Mg2Si, it is found that significant improvements in the extrusion properties of the metal are obtained by converting the Al-Fe-Si phase to cubic alpha -phase by heating the ingot at a temperature of 550 DEG C for about 1 hour.