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热处理制度对Zr-Sn-Nb新锆合金耐腐蚀性能的影响

Effect of Heat Treatment on the Corrosion Resistance for Zr-Sn-Nb New Zirconium Alloy

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【作者】 严青松刘文庆雷鸣李强姚美意周邦新

【Author】 Yan Qingsong1, Liu Wenqing1, Lei Ming1, Li Qiang1, Yao Meiyi2, Zhou Bangxin2 (1. Instrumental Analysis and Research Center, Shanghai University, Shanghai 200444, China) (2. Institute of Materials, Shanghai University, Shanghai 200072, China)

【机构】 上海大学分析测试中心上海大学材料研究所上海大学材料研究所 上海200444上海200444上海200072

【摘要】 将Zr-Sn-Nb新锆合金样品分别进行多种变形热处理,用透射电子显微镜研究它们的显微组织和第二相粒子。然后把它们放入高压釜中,在350℃,16.8MPa,0.01mol/LLiOH水溶液中腐蚀。结果表明:580℃-3h/冷轧/500℃-30h处理的样品具有最好的耐腐蚀性能,这是因为该样品中Zr-Fe-Nb第二相粒子呈均匀细小分布,且体积分数在几种样品中最高,导致基体中的Nb元素固溶含量最低。

【Abstract】 After being treated in different ways, Zr-Sn-Nb zirconium alloy specimens were exposed in 0.01 mol/L LiOH aqueous solution at 350℃, 16.8 MPa. The microstructures and second phase particles of these specimens were observed by transmission electron microscope. The results indicate that the specimen treated by 580℃-3 h/CR/500℃-30 h (580℃, holding 3 h→rapid cooled down to PT→Cold rolled, 50% reduction degree→500℃ for 30 h→cooled to RT) show best corrosion resistance among all specimens. TEM observation shows that a large number of the fine second phase particles are dispersed uniformly in the alloy. Moreover, the volume percent of second phase particles in this specimen is maximal, which result in the lowest Nb content in the matrix.

【基金】 国家自然科学基金资助项目(50571056);上海市科委自然基金(04ZR14057);核燃料及材料国家级重点实验室基金资助
  • 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2007年01期
  • 【分类号】TL341
  • 【被引频次】27
  • 【下载频次】416
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