时效工艺对Ti-10V-2Fe-3Al合金显微组织和力学性能的影响  

Influence of Aging Processing on Microstructure and Mechanical Properties of Ti-10V-2Fe-3Al Alloy

作　　者：商国强[1] 寇宏超[1] 费跃[1] 常辉[1] 朱知寿[2] 王新南[2] 张丰收 李金山[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072 [2]北京航空材料研究院,北京100095 [3]西部超导材料科技有限公司,陕西西安710016

出　　处：《稀有金属材料与工程》2010年第6期1061-1065,共5页Rare Metal Materials and Engineering

基　　金：航空重点基金(2007ZF21011);国家重点基础研究发展计划资助项目(2007CB613802)

摘　　要：研究单重时效、低温-高温双重时效、时效加热速度等工艺对Ti-10V-2Fe-3Al合金显微组织和力学性能的影响。结果表明:经过高温变形后的合金,在双重时效处理过程中,先析出的ω相为α相的沉淀析出提供均匀的形核点,使合金获得比单重时效处理更加均匀细小的α+β显微组织,获得更好的强韧化匹配;合金在以较低的升温速度(0.1℃/s)加热过程中,细小弥散分布的等温ω相有充足的时间析出,从而为后续α相的析出提供有利的形核位置,产生细小盘状α相,获得与双重时效相同的强韧化匹配效果。Effects of one-step aging, two-step aging of low-temperature and high-temperature and heating rate of aging on the microstructure and mechanical properties of Ti-10V-2Fe-3Al titanium alloy after high temperature deformation were studied. The results show that comparing with one-step aging, in the two-step aging the early precipitated ω particles provided uniform nucleation sites for α phase during the low-temperature aging. As a result, the two-step aging sequences led to much finer and more uniform α＋β microstructure to obtain good match of strength and ductility. For a slow heating rate of 0.1 oC/s to the peak aging temperature, a very finely dispersed isothermal ω-phase had enough time to precipitate, and thus provided nucleation sites of high density for the α-phase, resulting in the very fine α plates; therefore, the same match effect of strength and ductility was obtained

关 键 词：钛合金 时效工艺 显微组织 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]