Thermomechanical ageing for 6XXX extrusions

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United States of America Patent

PATENT NO 12043886
APP PUB NO 20200308681A1
SERIAL NO

16342745

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Abstract

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The present invention relates to extrusions for structural components, such as bumper, side impact beam, seat sill in vehicles and more particularly to a method for optimizing strength and energy absorption of 6XXX aluminium alloys extrusions by variations in thermomechanical ageing (TMA) consisting in

    i) an artificial preageing treatment with a duration t1 at a temperature T1 selected to increase the yield strength of said extrusion between 5% and 20%, said temperature T1 being typically between 120° C. and 180° C. and said duration t1 being typically between 1 and 100 hours, to obtain an artificially preaged extrusion,ii) a plastic deformation of said artificially preaged extrusion between 1% and 80% to obtain a deformed extrusion,iii) a final artificial ageing treatment of said deformed extrusion with a duration t2 at a temperature T2, said temperature T2 being typically between 140° C. and 200° C. and said the duration t2 being typically between 1 and 100 hours.

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Patent Owner(s)

Patent OwnerAddress
CONSTELLIUM SINGEN GMBH78224 SINGEN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beslin, Emmanuel Vaux Milieu, FR 3 0
Fitzner, Arnas Gerald Greater London, GB 2 0
Frank, Jochen Watterdingen, DE 7 13
Jarrett, Martin Oxfordshire, GB 12 21
Skubich, Alexis Zurich, CH 8 21

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