摘要
分别采用1 045℃/40 min+500℃/1.5 h、1 045℃/40 min+40%冷加工+500℃/1.5 h、1 045℃/40 min+70%冷加工+500℃/1.5 h工艺,将Zr-Sn-Nb新锆合金加工成厚度为1.4 mm的试样,用透射电镜观察它们的显微组织,对各种条件处理的试样进行拉伸性能研究。结果表明:在本试验所有的形变和热处理中,1 045℃/40 min+70%冷加工+500℃/1.5 h处理的样品的拉伸性能最好,这归因于经此工艺处理后的析出相细小、弥散、均匀分布,使材料得到第二相较理想的强化效果。
The specimens of Zr-Sn-Nb new zirconium alloys were treated in different ways at 1 045℃/40 min＋500℃/1.5 h, 1 045℃/40 min＋40% cooling work＋500℃/ 1.5 h, 1 045℃/40 min＋70% cooling work ＋500 ℃/1.5 h, respectively, the final thickness was 1.4 mm. Their microstructures were examined by transmission electron microscopy （TEM）, the stretch property was investigated with stretching experiments. It is found that the stretch property of specimens worked at 1 045 ℃/40 min＋70% cooling work ＋500℃/1.5 h is best among all specimens processed in different ways in this study. It is concluded that bigger deformation （70%） is adopted for Zr-Sn-Nb new zirconium alloy in the processing, which enables the grain size refiner. The strengthening effect of the precipitate phase is related to their size and shape, uniform dispersion of precipitate phase can achieve ideal strengthening effect.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2008年第B09期202-204,共3页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(50571083)
