Title:
WELDED STRUCTURAL MEMBER HAVING EXCELLENT STRESS CORROSION CRACKING RESISTANCE, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/070900
Kind Code:
A1
Abstract:
A welded structural member having excellent stress corrosion cracking resistance comprises a 7000-series aluminum alloy material having a metallic structure which comprises chemical components including 6.6 to 8.5 mass% of Zn, 1.0 to 2.1 mass% of Mg, 0.10 to 0.20 mass% of Zr, 0.001 to 0.05 mass% of Ti and a remainder made up by Al and unavoidable impurities and is a fibrous structure and another aluminum alloy material welded to the 7000-series aluminum alloy material, wherein the requirement represented by the formula: 0.120 ≤ (Y/X-1) ≤ 0.250 is satisfied wherein the electrical conductivity of the 7000-series aluminum alloy material before an artificial aging treatment is represented by X%IACS and the electrical conductivity of the 7000-series aluminum alloy material after the artificial aging treatment is represented by Y%IACS, and the difference between the electrical conductivity of a matrix zone excluding a weld heat affected zone in the 7000-series aluminum alloy material and the electrical conductivity of the weld heat affected zone is within 5%IACS.
More Like This:
Inventors:
SHAKUDO SHUHEI (JP)
ATSUTA KEN (JP)
ATSUTA KEN (JP)
Application Number:
PCT/JP2020/038115
Publication Date:
April 15, 2021
Filing Date:
October 08, 2020
Export Citation:
Assignee:
UACJ CORP (JP)
International Classes:
C22C21/10; B23K31/00; C22F1/00; C22F1/053
Foreign References:
| JP2007119904A | 2007-05-17 | |||
| JPH07180010A | 1995-07-18 | |||
| JP2018090839A | 2018-06-14 | |||
| JPH11302763A | 1999-11-02 | |||
| JPH09287046A | 1997-11-04 |
Attorney, Agent or Firm:
KIMURA Mitsuru (JP)
Download PDF: