- Patent Title: Aluminum alloy clad sheet and aluminum alloy clad structural member
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Application No.: US15341569Application Date: 2016-11-02
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Publication No.: US10344359B2Publication Date: 2019-07-09
- Inventor: Kazufumi Sato , Katsushi Matsumoto
- Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Applicant Address: JP Kobe-shi
- Assignee: Kobe Steel, Ltd.
- Current Assignee: Kobe Steel, Ltd.
- Current Assignee Address: JP Kobe-shi
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2015-227582 20151120
- Main IPC: C22C21/10
- IPC: C22C21/10 ; B32B15/01 ; C22C21/08

Abstract:
Provided is an aluminum alloy clad sheet that resolves the contradiction between a high strength level and ductility in a single sheet of the existing 7000-series aluminum alloy or the like, and has high strength, good formability (high ductility), and a good BH property through short-time artificial age hardening. An aluminum alloy clad sheet subjected to diffusion heat treatment includes a plurality of aluminum alloy layers being laminated. In the clad sheet, aluminum alloy layers having specific compositions are adjacently laminated such that the contents of Mg or Zn are different from each other, and a microstructure after the diffusion heat treatment has fine grain size and an interdiffusion region of Mg and Zn. In addition, the clad sheet has a specific DSC characteristic. Consequently, high strength and good formability (high ductility) are exhibited, and a BH property through short-time artificial age hardening is improved.
Public/Granted literature
- US20170145546A1 ALUMINUM ALLOY CLAD SHEET AND ALUMINUM ALLOY CLAD STRUCTURAL MEMBER Public/Granted day:2017-05-25
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