C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 21/02 (2006.01) C22F 1/043 (2006.01)
Patent
CA 2712316
A sheet of a 6000 type aluminum alloy containing Si and Mg as main alloy components and having excellent formability sufficient to allow flat hemming, excellent resistance to denting, and good hardenability during baking a coating, which exhibits an anisotropy of Lankford values of more than 0.4 or the strength ratio for cube orientations of the texture thereof of 20 or more, and exhibits a minimum bend radius of 0.5 mm or less at 180° bending even when the offset yield strength thereof exceeds 140 MPa through natural aging; and a method for producing the sheet of the aluminum alloy, which comprises subjecting an ingot to a homogenization treatment, cooling to a temperature lower than 350°C at a cooling rate of 100°C/hr or more, optionally to room temperature, heating again to a temperature of 300 to 500°C and subjecting it to hot rolling, cold rolling the hot rolled product, and subjecting the cold rolled sheet to a solution treatment at a temperature of 500°C or higher, followed by quenching.
Asano Mineo
Furuyama Tsutomu
Minoda Tadashi
Ozeki Yoshikazu
Uchida Hidetoshi
Riches Mckenzie & Herbert Llp
Sumitomo Light Metal Industries Ltd.
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