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 component or semi-finished product made of an aluminum alloy, comprising: 
 0.9-1.3 percent by weight of silicon;    0.7-1.2 percent by weight of magnesium;    less than 0.1 percent by weight of copper;    less than 0.5 percent by weight of iron;    less than 0.25 percent by weight of chromium;    0.05-0.2 percent by weight of at least one of circonium and hafnium; and    0.5-1.0 percent by weight of manganese, wherein the total content of chromium, manganese, circonium and/or hafnium is at least 0.6 percent by weight, wherein a grain structure of the component or semi-finished product contains an aluminum-silicon solid solution in addition to magnesium silicide precipitates, and wherein the component or semi-finished material has a tensile strength of 400 MPa.    
     
     
         13 . A component or semi-finished product made of an aluminum alloy, comprising: 
 0.9-1.7 percent by weight of silicon;    0.7-1.2 percent by weight of magnesium;    less than 0.1 percent by weight of copper;    less than 0.5 percent by weight of iron;    less than 0.25 percent by weight of chromium;    0.05-0.2 percent by weight of at least one of circonium and hafnium; and    0.5-1.0 percent by weight of manganese, wherein the total content of chromium, manganese, circonium and/or hafnium is at least 0.6 percent by weight, wherein a grain structure of the component or semi-finished product contains an aluminum-silicon solid solution in addition to magnesium silicide precipitates, and wherein the component or semi-finished material has a tensile strength of more than 390 MPa.    
     
     
         14 . The component or semi-finished product as recited in  claim 12 , further comprising: 
 less than 0.1 percent by weight of titanium; and    less than 0.2 percent by weight of zinc.    
     
     
         15 . The component or semi-finished product as recited in  claim 12 , wherein a ratio of the silicon to the manganese is between 1.1:1 and 1.3:1.  
     
     
         16 . The component or semi-finished product as recited in  claim 15 , wherein a ratio of the silicon to the manganese is between 1.16:1 and 1.24:1.  
     
     
         17 . The component or semi-finished product as recited in  claim 12 , wherein dispersoids containing the at least one of circonium and hafnium are anchored at grain boundaries of the grain structure.  
     
     
         18 . The component or semi-finished product as recited in  claim 12 , wherein the component has a breaking strain (A5) of more than 10%.  
     
     
         19 . The component or semi-finished product as recited in  claim 12 , wherein the component or semi-finished product is a suspension component.  
     
     
         20 . The component or semi-finished product as recited in  claim 12 , wherein the suspension component includes one of a tension rod, a bolt, a section, a screw, and a wheel.  
     
     
         21 . 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.    
     
     
         22 . The method as recited in  claim 21 , wherein the quenching is performed in at least one of water and air.  
     
     
         23 . The method as recited in  claim 21 , wherein the hot-forming is performed multiple times.  
     
     
         24 . The method as recited in  claim 21 , wherein the homogenizing is performed for at least four hours.  
     
     
         25 . The method as recited in  claim 21 , wherein the homogenizing is performed for twelve hours.