液相线半连续铸造7075铝合金的热处理性能  

Heat treatment performance of 7075 aluminum alloy cast by LSC

作　　者：路贵民[1] 董维国[1] 任栖锋[1] 崔建忠[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《材料与冶金学报》2002年第3期222-225,共4页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目 (No 5 99740 0 9);沈阳市基金资助项目 (No 2 0 0 12 2 8 0 7 13)

摘　　要：液相线半连续铸造是一种先进的半固态浆制备方法 ,本文研究了液相线半连续铸造70 75Al合金触变成形后的热处理工艺 .结果表明 ,固溶时间对合金力学性能的影响是显著的 ,时效时间对合金的力学性能也有较大的影响 ,固溶与时效处理对合金的强化是综合作用的结果 ,适当延长固溶与时效时间能有效提高合金的抗拉强度 ,70 75合金经 4 75℃ ,1 2h固溶淬火 ,1 4 0℃ ,2 2h时效之后 ,抗拉强度为 4 74 8MPa。Liquidus semi-continuous casting (LSC) is an advanced technology in semi-solid slurries making. This paper studies the heat treatment technics of 7075 alloy cast by LSC. The results show that the solution time has a prominent influence on the mechanical properties of 7075 alloy, and that the aging time also has an obvious effect on them. The hardening of alloy is caused by solution and aging indispensably. Properly prolonging the solution and aging time may enhance tensile strength efficiently. After 18 h's solution at 475℃ and 22 h's aging at 140℃, the tensile strength reaches 474.8 MPa..

关 键 词：液相线半连续铸造 7075铝合金 热处理性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG2[金属学及工艺—金属材料]