Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1994-03-02
1995-10-24
Jones, W. Gary
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148694, 148417, 148418, 148439, 420530, C22F 1047
Patent
active
054606667
ABSTRACT:
A method manufacturing an aluminum alloy sheet comprising preparing an aluminum alloy ingot essentially consisting of 1.5 to 3.5% by weight of Mg, 0.3 to 1.0% by weight of Cu, 0.05 to 0.6% by weight of Si, and a balance of Al, in which the ratio of Mg/Cu is in the range of 2 to 7, homogenizing the ingot in one step or in multiple steps, performed at a temperature within a range of 400 to 580.degree. C., preparing an alloy sheet having a desired sheet thickness by subjecting the ingot to a hot rolling and a cold rolling, subjecting the alloy sheet to heat treatment including heating the sheet up to a range of 500.degree. to 580.degree. C. at a heating rate of 3.degree. C./sec. or more, keeping it for 0 to 60 seconds at the temperature reached, and cooling it to 100.degree. C. or less at a looking rate of 2.degree. C./sec. or more, and keeping the alloy sheet at a temperature within a range of 180.degree. to 300.degree. C. for 3 to 60 seconds. Thus, a natural aging-retardated aluminum alloy sheet is obtained.
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Y. Komatsu; Development of All Aluminum Body for Automotive; Feb. 1991; pp. 42-48; JIDOSHA GIJYUTU (Automobile Technology), vol. 45, No. 6.
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Fujita Takeshi
Hasegawa Kohei
Mitao Shinji
Niikura Masakazu
Ohori Koichi
Jones W. Gary
Mitsubishi Aluminum Co. Ltd.
NKK Corporation
Vincent Sean
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