不同厚度Ta-2.5wt%W合金箔材退火行为的研究  

Study on Annealing Behaviors of Ta-2.5wt%W Alloy Foil with Different Thickness

作　　者：金鹏[1] 汪明朴[1] 郭明星[1] 谭望[1] 张真[1] 陈畅[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2009年第1期104-107,共4页Mining and Metallurgical Engineering

基　　金：国家高新技术发展"863"计划资助项目(2006AA03Z517);湖南省自然科学基金(05JJ30095)

摘　　要：通过显微硬度测试、金相显微镜和透射电镜观察,研究了Ta-2.5wt%W合金不同状态下的性能与组织的变化。结果表明:Ta-2.5wt%W合金冷轧态硬度可达240左右,同一厚度Ta-2.5wt%W合金在退火过程中,其硬度均随退火温度的升高而不断降低。厚度为0.068 mm的Ta-2.5wt%W合金在1 200℃退火时开始发生再结晶,而在1360℃退火时,发生完全再结晶且晶粒粗大。几种不同厚度Ta-2.5wt%W合金在退火过程中,随着试样厚度的不断变薄,其开始再结晶温度依次降低。不同厚度Ta-2.5wt%W合金经同一温度退火后,其回复再结晶程度也随试样厚度的变薄而有所加剧。The mechanical properties and microstructures of Ta-2.5wt% W alloy under different conditions are studied by micro-hardness test, TEM and metallographic observation. The results show that the hardness of cold-rolled Ta-2.5wt% W alloy reaches to 240. During the annealing, the hardness of Ta-2.5wt% W alloy with same thickness gradually falls with the increase of annealing temperature. The recrystallization of Ta-2.5wt% W alloy with 0. 068 mm thickness occurs at 1 200 ℃, while its complete recrystallization occurs at 1 360 ℃, with coarse grains. The initial recrystallization temperature of Ta-2.5wt% W alloys with different thickness falls with the samples＇ becoming thinner in the process of annea- ling. When Ta-2.5wt% W alloys with different thickness are annealed at the same temperature, the recovery degree of recrystallization increases with the samples＇ becoming thinner as well.

关 键 词：Ta—W合金 退火 回复 再结晶 

分 类 号：TG146.2[一般工业技术—材料科学与工程]