Title:
METHOD FOR IMPROVING STRENGTH OF AQ80M MAGNESIUM ALLOY AND PROLONGING STRAIN FATIGUE LIFE THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/048539
Kind Code:
A1
Abstract:
Disclosed is a method for improving strength of an AQ80M magnesium alloy and prolonging strain fatigue life thereof, comprising the following steps: performing homogeneous annealing on an AQ80M semi-continuous casting ingot blank, and then performing multi-directional hammer cogging; and performing primary rolling on an obtained forging blank at the high temperature of 380-430°C, and then reducing the temperature to 150-330°C, and performing finish-rolling forming. According to the method, the high-temperature plastic advantage of the AQ80M magnesium alloy is fully played, so that the forming property of the alloy is improved, and substantial reduction of material plasticity and fatigue performance due to dynamic precipitation is avoided. Moreover, the finish-rolling temperature is reduced by rapid cooling, grains can be effectively refined, the material strength is improved, and the strain fatigue life is prolonged. The operation process is simple and practicable, and a prepared AQ80M magnesium alloy board has the yield strength of higher than or equal to 280 MPa and the tensile strength of higher than or equal to 350 MPa, the fatigue life is 10 4 times or more when the additional total strain amplitude is 0.3%, and the fatigue life is 2200 times or more when the additional total strain amplitude is 0.5%.
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Inventors:
LIU CHUMING (CN)
MAO LONGHUI (CN)
WAN YINGCHUN (CN)
JIANG SHUNONG (CN)
GAO YONGHAO (CN)
MAO LONGHUI (CN)
WAN YINGCHUN (CN)
JIANG SHUNONG (CN)
GAO YONGHAO (CN)
Application Number:
PCT/CN2019/104796
Publication Date:
March 12, 2020
Filing Date:
September 06, 2019
Export Citation:
Assignee:
UNIV CENTRAL SOUTH (CN)
International Classes:
C22C23/02; C22F1/06
Domestic Patent References:
| WO2006003833A1 | 2006-01-12 |
Foreign References:
| CN109022975A | 2018-12-18 | |||
| CN106944799A | 2017-07-14 | |||
| CN102321836A | 2012-01-18 | |||
| CN107130197A | 2017-09-05 | |||
| CN106734205A | 2017-05-31 | |||
| CN107142431A | 2017-09-08 | |||
| JP3680818B2 | 2005-08-10 |
Attorney, Agent or Firm:
CHANGSHA RONG ZHI PATENT AGENCY (CN)
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