公开(公告)号：US11591674B2

公开(公告)日：2023-02-28

申请号：US17065995

申请日：2020-10-08

Applicant: UACJ Corporation ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryo Kuramoto ,  Takeshi Nagai ,  Yuya Masuda ,  Kazutaka Ohno

IPC: C22C21/04 ,  C22F1/043 ,  C21D8/02 ,  C21D9/46

Abstract: An aluminum-alloy sheet has a chemical composition containing Si: 2.3-3.8 mass %, Mn: 0.35-1.05 mass %, Mg: 0.35-0.65 mass %, Fe: 0.01-0.45 mass %, and at least one element selected from the group consisting of Cu: 0.0010-1.0 mass %, Cr: 0.0010-0.10 mass %, Zn: 0.0010-0.50 mass %, and Ti: 0.0050-0.20 mass %. The ratio of the Si content to the Mn content is 2.5 or more and 9.0 or less. The aluminum-alloy sheet exhibits an elongation of 23% or more and a strain hardening exponent of 0.28 or more at a nominal strain of 3%. Such an aluminum-alloy sheet is well suited for press forming (stamping) applications, such as forming automobile body panels.

公开(公告)号：US11499209B2

公开(公告)日：2022-11-15

申请号：US15517518

申请日：2015-10-08

Applicant: UACJ Corporation

Inventor： Tomoyuki Kudo ,  Yoshifumi Shinzato ,  Ryo Kuramoto

IPC: C22C21/06 ,  B22D11/00 ,  C22F1/047 ,  C22C21/00 ,  B22D11/124 ,  B22D11/049 ,  C22F1/00 ,  C21D8/02

Abstract: The present disclosure shows a superplastic-forming aluminum alloy plate that has excellent properties for superplastic-forming, such as blow forming, and that has excellent surface properties after forming. Shown is a superplastic-forming aluminum alloy plate and a production method therefor, the superplastic-forming aluminum alloy plate being characterized by comprising an aluminum alloy which contains 2.0 to 6.0 mass % Mg, 0.5 to 1.8 mass % Mn and 0.40 mass % or less Cr and in which the balance consists of Al and unavoidable impurities, wherein the unavoidable impurities are restricted to have 0.20 mass % or less Fe and 0.20 mass % or less Si, the 0.2% proof stress is 340 MPa or more, and the density of intermetallic compounds having an equivalent circular diameter of 5 to 15 μm at the RD-TD plane which extends along the center of the plate cross-section is 50 to 400 pieces/mm2.

公开(公告)号：US11459642B2

公开(公告)日：2022-10-04

申请号：US15517518

申请日：2015-10-08

Applicant: UACJ Corporation

Inventor： Tomoyuki Kudo ,  Yoshifumi Shinzato ,  Ryo Kuramoto

IPC: C22C21/06 ,  B22D11/00 ,  C22F1/047 ,  C22C21/00 ,  B22D11/124 ,  B22D11/049 ,  C22F1/00 ,  C21D8/02

Abstract: The present disclosure shows a superplastic-forming aluminum alloy plate that has excellent properties for superplastic-forming, such as blow forming, and that has excellent surface properties after forming. Shown is a superplastic-forming aluminum alloy plate and a production method therefor, the superplastic-forming aluminum alloy plate being characterized by comprising an aluminum alloy which contains 2.0 to 6.0 mass % Mg, 0.5 to 1.8 mass % Mn and 0.40 mass % or less Cr and in which the balance consists of Al and unavoidable impurities, wherein the unavoidable impurities are restricted to have 0.20 mass % or less Fe and 0.20 mass % or less Si, the 0.2% proof stress is 340 MPa or more, and the density of intermetallic compounds having an equivalent circular diameter of 5 to 15 μm at the RD-TD plane which extends along the center of the plate cross-section is 50 to 400 pieces/mm2.