公开(公告)号：US20170356073A1

公开(公告)日：2017-12-14

申请号：US15602839

申请日：2017-05-23

Applicant: UACJ CORPORATION

Inventor： Yuya SAWA ,  Minoru HAYASHI

IPC: C22F1/057 ,  C22F1/047 ,  C22C21/14 ,  C22C21/08 ,  C22C21/16

CPC classification number: C22F1/057 ,  C22C21/08 ,  C22C21/14 ,  C22C21/16 ,  C22F1/047

Abstract: The present invention relates to a high-strength aluminum alloy thick plate composed of an aluminum alloy including a prescribed quantity of Si, Mg, Ti, Fe, and the balance Al. The thick plate has a material structure in which an area ratio of Mg2Si having circle equivalent diameters of 3 μm or more in a plate thickness central portion is 0.45% or less; and an area ratio of Mg2Si having circle equivalent diameters of 3 μm or more in a region of 20 mm±1.5 mm from a plate surface in a plate thickness direction is 1.2 times or more and 3.0 times or less the area ratio of Mg2Si having circle equivalent diameters of 3 μm or more in the plate thickness central portion. The aluminum alloy thick plate has sufficient strength and good uniformity of strength in the plate thickness direction, and can be manufactured by cooling it after a solution treatment, so that suitable temperature difference occurs between a plate thickness central portion and a surface, and then performing a quenching treatment.

公开(公告)号：US20200239991A1

公开(公告)日：2020-07-30

申请号：US16315739

申请日：2017-07-13

Applicant: UACJ CORPORATION

Inventor： Yusuke YAMAMOTO ,  Yuya SAWA

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

Abstract: The present disclosure provides an aluminum alloy rolled material for molding, including an Al—Mg—Si—Cu-based alloy containing 0.30 mass % or more Cu. A ratio of a cube orientation density to a random orientation is 10 or more in a plane that is perpendicular to a sheet thickness direction and is at a depth of ¼ of a total sheet thickness from a surface. An absolute value of a difference between a maximum value and a minimum value of an average Taylor factor in a case in which molding is assumed to cause plane strain deformation having a main strain direction that is a rolling width direction is 1.0 or less. The average Taylor factor is obtained for each of subareas that are obtained by equal division of an area, having a 10 mm width in the rolling width direction and a 2 mm length in a rolling direction, into 10 subareas in the rolling width direction. The subareas are in a plane that is perpendicular to the sheet thickness direction and is at a depth of ½ of the total sheet thickness from the surface.