显微组织对Zr-Sn-Nb新锆合金拉伸性能的影响  

Effect of Microstructure on Stretch Property for Zr-Sn-Nb New Zirconium Alloys

作　　者：张建军[1] 李中奎[1] 王文生[1] 田锋[1] 周军[1] 石明华[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《原子能科学技术》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)

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.

关 键 词：Zr-Sn-Nb新锆合金 拉伸性能 微观组织 

分 类 号：TG146.414[一般工业技术—材料科学与工程]