摘要
对比研究了单重时效、低温-高温双重时效、时效加热速度等工艺对经热变形后的Ti-10V-2Fe-3A l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相的沉淀析出提供了均匀的形核位置,使合金获得了比单重时效处理更加均匀细小的α+β显微组织,使得强度获得了较大幅度的提高;合金在较低的升温速度(0.1℃.s-1)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,获得了与双重时效相同的强化效果。
The effects of one-step aging, low-tempera- ture-high-temperature two-step aging and heating rate in aging process on microstructure and mechanical properties of Ti-10V-2Fe-3Al titanium alloy after high temperature deformation were investigated. The results showed that the low-temperature-high-temperature two- step aging was effective to yield the α ＋ β phase of u- niform and fine dispersion, and the pre-precipitated i sothermal ω phase provided more uniform nucleation position for precipitation of α phase than one-step ag- ing so as to improve the alloy tensile strengthen great- ly. During heating process of low （0.1 ℃.s-1）, a very finely dispersed phase could precipitate sufficiently so more advantageous nucleation position heating rates isothermal so as to provide to precipitate very fine α phase of plate style, and the strengthening effect was the same with that of low-temperature-high- temperature two-step aging.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2009年第4期484-488,共5页
Chinese Journal of Rare Metals
基金
航空重点基金(2007ZF21011)
国家973计划(2007CB613802)资助项目
关键词
钛合金
时效工艺
显微组织
力学性能
titanium alloy
aging processing
microstructure
mechanical properties
