Aluminum alloy, useful to produce e.g. sheet and strip products in road vehicles, comprises composition comprising e.g. silicon, magnesium, manganese, copper, iron, chromium, titanium, hafnium, unavoidable impurities, aluminum and tantalum

摘要

Aluminum alloy (I) of 6XXX alloy group comprises composition comprising: silicon (0.3-11.5 wt.%); magnesium (0.06-1.2 wt.%); manganese (0.05-0.9 wt.%); copper (0.01-0.5 wt.%); iron (0.05-0.5 wt.%); chromium (0.05-0.25 wt.%); titanium (0.02-0.9 wt.%); optionally vanadium (0.05-0.3 wt.%); hafnium (0.02-0.3 wt.%); unavoidable impurities (maximum 0.1 wt.%); and aluminum (added to 100%), where the composition contains grain refinement component of tantalum (0.02-0.3 wt.%). An independent claim is included for producing semi-finished or intermediate products and components, profile parts, sheets and strip products comprising: providing cast molded-body, -bolt and -piece from (I); subjecting (I) by at least a one-step heating process at 470-580[deg] C; forming the semi-finished products by at least stamping, rolling, forging, stretching, pressing, extrusion, flow and drawing presses, or hydroforming at temperatures of 400-580[deg] C, preferably 430-550[deg] C; optionally, performing multi-stage treatment at 480-560[deg] C for 0.1-4 hours, preferably 1-2 hours; and artificial aging or heat treating at 140-215[deg] C for 0.5-20 hours, preferably 1-15 hours.