High-strength and high-ductility Al alloy and process for production of the same

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United States of America Patent

PATENT NO 8444777
APP PUB NO 20100101748A1
SERIAL NO

12529030

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Abstract

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An object of the present invention is to provide an Al—Zn—Mg—Cu 7000-series Al alloy having high ductility as well as having high strength. For attaining this purpose, an Al alloy having a structure in which an inclusion is not included is produced by reducing an amount of oxygen contained in an Al alloy that is obtained by solidifying a preform resulting from rapid solidification by preferably spray forming a molten metal of an Al—Zn—Mg—Cu 7000-series Al alloy with an inert gas. This Al alloy has, as mechanical properties at an ordinary temperature, a tensile strength of 600 MPa or more, and an elongation of 15% or more when the tensile strength is from 600 MPa or more and less than 800 MPa or an elongation of 10% or more when the tensile strength is 800 MPa or more, and is excellent in cold workability such as rollability.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL LTD )10-26 WAKINOHAMA-CHO 2-CHOME CHUO-KU KOBE-SHI HYOGO 651-8585

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hata, Hideo Kobe, JP 69 665
Kajihara, Katsura Kobe, JP 33 124
Nagao, Mamoru Kobe, JP 21 241
Namba, Shigenobu Kobe, JP 9 13
Takeda, Hiroyuki Kobe, JP 66 436

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