Title:
HIGH-STRENGTH AL-CU-MG-MN ALUMINUM ALLOY AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/041268
Kind Code:
A1
Abstract:
Disclosed are a high-strength Al-Cu-Mg-Mn aluminum alloy and a preparation method therefor, relating to the field of aluminum alloys. The alloy comprises the following components in percentage by weight: Si: ≤0.5%, Fe: ≤0.5%, Cu: 4.5-6.3%, Mg: 0.6-1.2%, Mn: 0.6-1.5%, Sc: 0.15-0.35%, Zr: 0.1-0.2%, and Y: 0.1-0.3%, the balance being aluminum and non-removable impurities. The preparation method comprises: smelting, refining purification and degasification, pouring, homogenization heat treatment, three-dimensional large deformation forging pre-deformation, isothermal deformation processing, and heat treatment. A casting mold used is a special combined mold having a metal mold as an inner mold, a surrounding cooling pipe, and a sand mold as an outer mold, and can be utilized to prepare and obtain high-quality, high-performance castings. The heat treatment is solid solution treatment plus gradient aging treatment. The Al-Cu-Mg-Mn aluminum alloy prepared by the present invention has strength greater than 520 MPa and an elongation rate of 12-16%, that is, an increased elongation rate and improved strength. The method of the present invention is simple and has important value in the field of high-strength aluminum alloys.
Inventors:
LIU ZUMING (CN)
ZHOU XU (CN)
REN YAKE (CN)
NONG BIZHONG (CN)
LU SIZHE (CN)
CAO BIN (CN)
AI YONGKANG (CN)
WEI BING (CN)
LV XUEQIAN (CN)
ZHOU XU (CN)
REN YAKE (CN)
NONG BIZHONG (CN)
LU SIZHE (CN)
CAO BIN (CN)
AI YONGKANG (CN)
WEI BING (CN)
LV XUEQIAN (CN)
Application Number:
PCT/CN2020/112715
Publication Date:
March 03, 2022
Filing Date:
August 31, 2020
Export Citation:
Assignee:
UNIV CENTRAL SOUTH (CN)
International Classes:
C22C21/16; C22C1/03; C22C21/14; C22F1/057
Foreign References:
| CN108342628A | 2018-07-31 | |||
| CN101240390A | 2008-08-13 | |||
| CN111020320A | 2020-04-17 | |||
| JP2017128789A | 2017-07-27 |
Other References:
LIAO SIMIN: "Microstructural Evolution of Al-Cu-Mg-Mn-Sc-Zr Alloy during Homogenization", HEAT TREATMENT OF METALS, vol. 45, no. 4, 25 April 2020 (2020-04-25), JP , pages 55 - 59, XP055903184, ISSN: 0254-6051, DOI: 10.13251/j.issn.0254-6051.2020.04.011
Attorney, Agent or Firm:
CHANGSHA RONG ZHI PATENT AGENCY (CN)
Download PDF: