US 11,746,403 B2
Method for producing a motor vehicle component from a 6000 series aluminum alloy
Jochem Grewe, Salzkotten (DE); Feng Jiao, Paderborn (DE); Friedrich Bohner, Oerlinghausen (DE); Jörn Tölle, Paderborn (DE); and Nikolay Soritov, Paderborn (DE)
Assigned to BENTELER AUTOMOBILTECHNIK GmbH, Paderborn (DE)
Filed by BENTELER AUTOMOBILTECHNIK GMBH, Paderborn (DE)
Filed on Aug. 3, 2018, as Appl. No. 16/54,311.
Claims priority of application No. 10 2017 117 675.6 (DE), filed on Aug. 3, 2017.
Prior Publication US 2019/0040507 A1, Feb. 7, 2019
Int. Cl. C22F 1/05 (2006.01); C21D 9/00 (2006.01); C22F 1/00 (2006.01); C22C 21/04 (2006.01)
CPC C22F 1/05 (2013.01) [C21D 9/0062 (2013.01); C21D 9/0068 (2013.01); C22C 21/04 (2013.01); C22F 1/002 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for producing a motor vehicle component from a 6000 series aluminum alloy, comprising:
providing a blank made of a 6000 series aluminum alloy with a material structure, wherein the blank is in the state F temper condition according to EN515;
rapid contact heating of the blank to a temperature between 450 deg. C. and 600 deg. C. at a heating rate of more than 25 K/s in a period of less than 20 seconds;
solution annealing above 450 deg. C.;
ending the heating process after achieving a grain size between 20 and 50 μm for the material structure of the heated blank;
quenching the blank thus tempered;
applying a lubricant at a temperature between 20 deg. C. to 100 deg. C.;
cold forming the cooled blank in a forming tool, wherein the time between completion of the heating process and the start of the forming is less than 30 seconds;
wherein an aluminum alloy is used that comprises the following alloy elements, expressed in percent by weight:
 
 
 
 silicon (Si) 0.70 to 1.10,
 
 magnesium (Mg) 0.50 to 0.80
 
 manganese (Mn) 0.10 to 0.20
 
 
balance aluminum and impurities due to smelting, and
wherein the aluminum alloy further comprises at least one of the following alloy elements, expressed in percent by weight:
 
 
 
 copper (CU) 0.03 to 0.20
 
 chromium (Cr) 0.10 to 0.20
 
 titanium (Ti) 0.010 to 0.030
 
 iron (Fe) 0.10 to 0.25; and
 
 
aging.