公开(公告)号：US11866807B2

公开(公告)日：2024-01-09

申请号：US17290564

申请日：2020-04-24

Applicant: UACJ Corporation ,  UACJ EXTRUSION CORPORATION

Inventor： Taichi Suzuki ,  Kiyotake Sawa ,  Shuhei Shakudo

IPC: C22C21/06 ,  C23C4/08 ,  C22C21/08 ,  C21D8/10

CPC classification number: C22C21/08 ,  C21D8/10 ,  C23C4/08

Abstract: An aluminum alloy pipe includes a pipe body portion made of an Al—Mg series alloy that includes Mg at a concentration equal to or higher than 0.7 mass % and lower than 2.5 mass % and Ti at a concentration higher than 0 mass % and equal to or lower than 0.15 mass %, with the balance being Al and unavoidable impurities, and a Zn-containing layer being outside the pipe body portion and including Zn being diffused in the Al—Mg series alloy at a concentration equal to or higher than 0.1 mass %.

公开(公告)号：US20180347017A1

公开(公告)日：2018-12-06

申请号：US15777798

申请日：2016-11-18

Applicant: UACJ CORPORATION

Inventor： Taichi Suzuki ,  Hidenori Hatta ,  Shuhei Shakudo

IPC: C22C21/10 ,  C22F1/053

CPC classification number: C22C21/00 ,  C22C21/10 ,  C22F1/00 ,  C22F1/04 ,  C22F1/053

Abstract: An aluminum alloy material as one aspect of the present disclosure has a chemical composition including: Zn: more than 6.5% (mass %, same applies hereafter) and 8.5% or less; Mg: 0.5% or more and 1.5% or less; Cu: 0.10% or less; Fe: 0.30% or less; Si: 0.30% or less; Mn: less than 0.05%; Cr: less than 0.05%; Zr: 0.05% or more and 0.10% or less; and Ti: 0.001% or more and 0.05% or less, a balance including Al and inevitable impurities. In the aluminum alloy material, a mass ratio of Zn to Mg (Zn/Mg) is 5 or more and 16 or less, and a metallographic structure includes an equigranular recrystallized structure.

公开(公告)号：US20240247355A1

公开(公告)日：2024-07-25

申请号：US18583027

申请日：2024-02-21

Applicant: UACJ CORPORATION

Inventor： Shuhei Shakudo ,  Ken Atsuta

IPC: C22F1/053 ,  B23K9/23 ,  B23K31/00 ,  B23K103/10 ,  C22C21/10

CPC classification number: C22F1/053 ,  B23K9/23 ,  B23K31/00 ,  C22C21/10 ,  B23K2103/10

Abstract: A production method of producing a welded structural member with excellent stress corrosion cracking resistance that includes a first artificial aging treatment step of maintaining a 7000-series aluminum alloy material at a temperature of 90 to 110° C. for 1 to 5 hours, a second artificial aging treatment step of maintaining the 7000-series aluminum alloy material subjected to the first artificial aging treatment step at a temperature of 145 to 160° C. for 4 to 12 hours; a welding step of welding the 7000-series aluminum alloy material subjected to the second artificial aging treatment step with another aluminum alloy material to form a welded structure; and a heat treatment step of heat-treating the welded structure at a temperature of 165 to 195° C. for 10 to 60 minutes. The material includes Zn, Mg, Zr, Ti, Cu, Mn, Cr, and Al, and is formed of a metallographic structure that is of a fibrous structure.