Hot-and cold-formed aluminum alloy

Abstract

A component or semi-finished piece is made from a hot-form aluminium alloy of the following composition in wt. %: silicon 0.9-1.3, magnesium 0.7-1.2, manganese 0.5-1.0, copper less than 0.1, iron less than 0.5, chromium less than 0.25, titanium less than 0.1, zinc less than 0.2, zirconium and/or hafnium 0.05-0.2 and further unavoidable impurities, whereby the total amount of chromium and manganese and zirconium and/or hafnium is at least 0.4 by weight. The aluminium/silicon mixed crystals are present in addition to magnesium silicide precipitates.

1 - 11 . (canceled)  
     
     
         12 : A method for manufacturing a component or semi-finished product, the method comprising: 
 homogenizing a cast raw material at a temperature between 420° C. and 540° C.;    forming the raw material into a shaped part at a temperature between 450° C. and 560° C.;    heating the shaped part to a solution treatment temperature between 440° C. and 560° C.;    hot-forming the shaped part at the solution treatment temperature so as to form a forged part;    quenching the forged part; and    artificially aging the forged part at a temperature between 160° C. and 240° C. so as to create the component or semi-finished product.    
     
     
         13 : The method as recited in claim  21 , wherein the quenching is performed in at least one of water and air.  
     
     
         14 : The method as recited in claim  21 , wherein the hot-forming is performed multiple times.  
     
     
         15 : The method as recited in claim  21 , wherein the homogenizing is performed for at least four hours.  
     
     
         16 : The method as recited in claim  21 , wherein the homogenizing is performed for twelve hours.