公开(公告)号：US11739405B2

公开(公告)日：2023-08-29

申请号：US17197238

申请日：2021-03-10

Applicant: SHOWA DENKO K.K.

Inventor： Takuya Arayama

IPC: C22F1/043 ,  C22C21/02

CPC classification number: C22F1/043 ,  C22C21/02

Abstract: A method of producing an Al—Mg—Si-based aluminum alloy forged product, includes a solution heat treatment step of performing a solution heat treatment for heating the forged product obtained in the forging step at a temperature rising rate of 5.0° C./min or more from 20° C. to 500° C. and holding the forged product at 530° C. to 560° C. for 0.3 hours to 3 hours, a quench treatment step of quenching the forged product in a water tank by bringing an entire surface of the forged product into contact with quenching water within 5 seconds to 60 seconds after the solution heat treatment step for more than 5 minutes and not more than 40 minutes, and an aging treatment step of performing an aging treatment by heating the forged product after the quench treatment step at a temperature of 180° C. to 220° C. for 0.5 hours to 1.5 hours.

公开(公告)号：US11840748B2

公开(公告)日：2023-12-12

申请号：US18086088

申请日：2022-12-21

Applicant: SHOWA DENKO K.K.

Inventor： Takuya Arayama

IPC: C22C21/02

CPC classification number: C22C21/02 ,  C22C2200/00

Abstract: An aluminum alloy forging includes 0.30 mass % or more and 1.0 mass % or less of Cu; 0.63 mass % or more and 1.30 mass % or less of Mg; 0.45 mass % or more and 1.45 mass % or less of Si; the balance being Al and inevitable impurities, wherein the following relations are satisfied,

[Mg content]×1.587≥−4.1×[Cu content]2+7.8×[Cu content]−1.9  (1)

[Si content]×2.730≥−4.1×[Cu content]2+7.8×[Cu content]−1.9  (2)

and the ratio of the integrated intensity Q1 of the X-ray diffraction peak of the CuAl2 phase to the integrated intensity Q2 of the X-ray diffraction peak of the (200) plane of the Al phase obtained by the X-ray diffraction method, Q1/Q2, is 2×10−1 or less.