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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 3    No. 3    September 1993

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A NEW HEAT-TREATMENT PROCESS FOR 2014 ALUMINUM ALLOY AND ITS MECHANISM
Wang Lingyun; Huang Guangjie ;Chao Denju

Chongqing Univsrsity; Chongqing 630044; China

Abstract:The plan of heat-treatment process for 2014Al alloy is designed using orthogonal method, the heat-treatment experiments are made and the mechanical properties are tested according to the designed plan. The effect of solid solution temperature, ageing temperature, ageing time on microscopic mechanism of the mechanical properties of the 2014Al alloy is studied using microscope, transmission electron microscope. The best heat treatment process of the 2014Al alloy is developed. The experimental results indicate that the strength σ_b, yield stress σ_(0.2), percentage elongation δ of the alloy reach separately 490~500 MPa, 450~490 MPa, 10~12% adopting the new heat treatment process. Compared with GB, the strength increases 20~30%, the percentage elongation increases 30~40%. The mechanism of the new heat-treatment process is also discussed.

 

Key words: 2014Al new heat treatment process mechanism ultimate tensile strength yield stress percent age elongation

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
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