摘要
采用挤压铸造技术制备了2024铝合金管件,研究了固溶处理对析出相溶解过程的影响.结果表明:固溶处理初期,组织中θ和S相的数量逐渐减少,但在晶界的共晶相中还有一定的Cu含量;随固溶时间增加,合金基体中Cu和Mg的含量逐渐增多,晶界处的共晶相大部分固溶进入基体,合金的固溶强化作用主要来源于富Cu,Mg相的溶解.合金经过495℃固溶处理16 h+190℃时效12 h后,抗拉强度达到435 MPa,延伸率6.9%.
The 2024 aluminium alloy tubes were prepared by squeeze casting.The dissolution of the intermetallic phases was studied,and the effect of solution on strengthening in 2024 casting alloys during heat treatment was analyzed.The results showed that the U phase（Al2Cu） and S phase（Al2CuMg） dissolved gradually in the initial stage of solution,but Cu element still existed around grain boundary.With the time of solution treatment prolonging,the amounts of Cu and Mg in matrix increased.However,the function of solution strengthening mainly originates from Cu and Mg dissolve.The alloys underwent solution treated at 495 ℃ and they were aged for 12 h hours at 190 ℃ afterwards,the tensile strength of the alloy reaches to 435 MPa and the specific elongation of the alloy is up to 6.9%.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第5期74-77,共4页
Journal of Hunan University:Natural Sciences
基金
横向课题轻量化传动空心轴的研制
