(1. 中南大學(xué) 材料學(xué)與工程學(xué)院，長沙 410083；
2. 邵陽學(xué)院 機(jī)械工程系， 邵陽 422004；
3. 西南鋁加工廠， 重慶 401326)
摘 要: 采用化學(xué)成分優(yōu)化、 熔體凈化、 晶粒細(xì)化、 鑄錠長時(shí)間均勻化即“四化”處理、 高溫長時(shí)間固溶處理及長時(shí)間時(shí)效處理， 對高強(qiáng)鋁合金的組織和性能進(jìn)行了研究。結(jié)果表明： 采用該方法能明顯改善和提高高強(qiáng)鋁合金的綜合性能， 合金B(yǎng)的σb， σ0.2， δ和KIC分別為652MPa， 604MPa， 12 %和36MPa·m1/2, 該性能指標(biāo)已超過美國和俄羅斯同類材料的標(biāo)準(zhǔn)。
關(guān)鍵字: 高強(qiáng)鋁合金；復(fù)合強(qiáng)韌化； 組織； 性能
properties of high strength
aluminum alloy
（1. College of Materials Science and Engineering,
Central South University, Changsha 410083, China;
2. Department of Mechanical Engineering, Shaoyang Institute, Shaoyang 422004, China;
3. Southwestern Aluminum Fabrication Plant,
Chongqing 401326, China）
Abstract:The microstructure and mechanical properties of high strength aluminum alloy were studied by means of four treatments: optimizing component elements, purifying solution, refining grain and enhancing homogenization, and higher temperature long time solution treatment and long time age treatment. The results show that the mechanical properties of the high strength aluminum alloy are improved effectively, and the σb, σ0.2, δ and KIC of the B alloy are 652MPa, 604MPa, 12 % and 36MPa·m1/2, respectively. The values of the mechanical properties of B alloy are higher than the ones of similar materials made in USA and Russia.
Key words: high strength aluminum alloy; multi-enhanced treatment; microstructure; properties
Key words: high strength aluminum alloy; multi-enhanced treatment; microstructure; properties
