公开(公告)号：US11053576B2

公开(公告)日：2021-07-06

申请号：US15558089

申请日：2017-07-12

Applicant: UACJ CORPORATION

Inventor： Yusuke Yamamoto ,  Yoshifumi Shinzato ,  Mineo Asano

IPC: C22F1/05 ,  C22F1/057 ,  C22C21/02 ,  C22C21/08 ,  B21B3/00 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18

Abstract: The present disclosure relates to a method for producing an aluminum alloy rolled material for deformation molding, the method including: a step of performing homogenization treatment of an ingot including an aluminum alloy with predetermined composition; a step of cooling the aluminum alloy after the homogenization treatment so that an average cooling rate in an ingot thickness of ¼ part from 500° C. to 320° C. is 30° C./h to 2000° C./h; and a step of starting hot rolling at 370° C. to 440° C. and winding the hot-rolled aluminum alloy at 310 to 380° C., in which the method for producing an aluminum alloy rolled material for deformation molding further includes a step of retaining the aluminum alloy after the cooling step for 0.17 hours or more at a heating temperature before rolling set within a range of 370° C. to 440° C. before the hot rolling.

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.

公开(公告)号：US20190119800A1

公开(公告)日：2019-04-25

申请号：US15558089

申请日：2017-07-12

Applicant: UACJ CORPORATION

Inventor： Yusuke Yamamoto ,  Yoshifumi Shinzato ,  Mineo Asano

IPC: C22F1/05 ,  C22C21/02 ,  C22C21/08

Abstract: The present disclosure relates to a method for producing an aluminum alloy rolled material for deformation molding, the method including: a step of performing homogenization treatment of an ingot including an aluminum alloy with predetermined composition; a step of cooling the aluminum alloy after the homogenization treatment so that an average cooling rate in an ingot thickness of 1/4 part from 500° C. to 320° C. is 30° C./h to 2000° C./h; and a step of starting hot rolling at 370° C. to 440° C. and winding the hot-rolled aluminum alloy at 310 to 380° C., in which the method for producing an aluminum alloy rolled material for deformation molding further includes a step of retaining the aluminum alloy after the cooling step for 0.17 hours or more at a heating temperature before rolling set within a range of 370° C. to 440° C. before the hot rolling.

公开(公告)号：US20170247781A1

公开(公告)日：2017-08-31

申请号：US15442128

申请日：2017-02-24

Applicant: UACJ CORPORATION

Inventor： Yoshifumi Shinzato ,  Tomoyuki Kudo

IPC: C22F1/043 ,  B22D21/00 ,  B21D26/021 ,  C22C21/02

CPC classification number: C22F1/043 ,  B21D26/021 ,  B22D21/007 ,  C22C21/02

Abstract: The present invention provides an Al—Mg—Si-based hot forming aluminum alloy plate which has not only high age-hardening property but also a high m value in a high strain rate range and excellent surface properties after forming and which is suitable for hot forming. The hot forming aluminum alloy plate comprises an aluminum alloy comprising 0.3 to 1.8 mass % Mg, 0.6 to 2.0 mass % Si and 0.04 to 0.20 mass % Fe. In the aluminum alloy, Mn content is restricted to 0.030 mass % or less, and Cr content is restricted to 0.030 mass % or less, and a balance comprises Al and unavoidable impurities. The hot forming aluminum alloy plate has an electrical conductivity of 60% or less according to IACS %. A production method of the hot forming aluminum alloy plate is also provided.