Method for manufacturing AlMgSi aluminium strip

Abstract

The invention relates to a method for producing a strip made of an AlMgSi alloy, in which a rolling ingot made of an AlMgSi alloy is cast, the rolling ingot is subjected to homogenization, the rolling ingot having been brought to rolling temperature is hot-rolled and is optionally cold-rolled to the final thickness thereafter. The problem of providing an improved method for producing aluminum strip made of an AlMgSi alloy, with which AlMgSi strips having very good shaping behaviour can be produced reliably, is solved in that immediately after exit from the final rolling pass, the hot strip has a temperature of between more than 130° C., preferably 135° C., and at most 250° C., preferably at most 230° C., and the hot strip is wound up at this temperature.

1 . A method for manufacturing a strip from an AlMgSi alloy, comprising casting a rolling ingot from an AlMgSi alloy, wherein the rolling ingot undergoes homogenization, the rolling ingot which has been brought to a rolling temperature is hot rolled then optionally cold rolled to final thickness, and the finished rolled strip is solution annealed and quenched, wherein immediately after being discharged from the last hot rolling pass, the hot strip is at a temperature of more than 130° C. to 250° C., preferably to 230° C., and the hot strip is coiled at this temperature. 
     
     
         2 . The method as claimed in  claim 1 , wherein the hot strip is quenched to the outlet temperature using at least one plate cooler and the hot rolling pass itself, loaded with emulsion. 
     
     
         3 . The method as claimed in  claim 1 , wherein prior to the start of the cooling process, the temperature of the hot strip is more than 400° C. 
     
     
         4 . The method as claimed in  claim 1 , wherein the temperature of the hot strip after the penultimate rolling pass is more than 250° C. 
     
     
         5 . The method as claimed in  claim 1 , wherein the temperature of the hot strip after the last rolling pass prior to coiling is 200° C. to 230° C. 
     
     
         6 . The method as claimed in  claim 1 , wherein the thickness of the prepared hot strip is 3 mm to 12 mm, preferably 5 mm to 8 mm. 
     
     
         7 . The method as claimed in  claim 1 , wherein the aluminium alloy is of alloy type AA6xxx, preferably AA6014, AA6016, AA6060, AA6111 or AA6181. 
     
     
         8 . The method as claimed in  claim 1 , wherein the finished, rolled aluminium strip undergoes a heat treatment, in which the aluminium strip is heated to more than 100° C. after solution annealing and quenching and then coiled and aged at a temperature of more than 55° C., preferably more than 85° C. 
     
     
         9 . Use of an aluminium strip manufactured by a method as claimed in  claim 1  for a component, chassis or structural part or panel in automotive, aircraft or railway vehicle engineering, in particular as component, chassis part, external or internal panel in automotive engineering, preferably as a bodywork component.