杨忠波.Zr-0.8Sn-1Nb-0.3Fe锆合金显微组织与耐腐蚀性能关系研究[J].稀有金属材料与工程,2018,47(3):794~798.[yangzhongbo.Studies on the correlation between microstructure and corrosion behavior of Zr-0.8Sn-1Nb-0.3Fe alloy[J].Rare Metal Materials and Engineering,2018,47(3):794~798.]
Zr-0.8Sn-1Nb-0.3Fe锆合金显微组织与耐腐蚀性能关系研究
投稿时间:2016-03-25  修订日期:2016-09-27
中文关键词:  Zr-0.8Sn-1Nb-0.3Fe锆合金  热处理  显微组织  腐蚀
基金项目:
中文摘要:
      采用不同的热处理工艺制备出Zr-0.8Sn-1Nb-0.3Fe合金板材,用OM、TEM分析了合金样品的显微组织,用静态高压釜进行了360℃/18.6MPa/0.01mol/LLiOH水溶液和400℃/10.3MPa蒸汽腐蚀试验。结果表明,随着热轧温度从600℃增加至700℃,第二相分布均匀性逐渐变差,第二相主要为C14型HCP-Zr(Nb,Fe)2;热轧前时效改善第二相分布均匀性的同时,促进Nb的扩散,相应增加了βNb的数量,延长最终退火时间对第二相分布影响不大,但增加了第二相中的Nb/Fe比;合金在两种水化学介质中的耐腐蚀性能随热轧温度升高而降低,热轧前时效能改善合金的耐腐蚀性能,延长最终退火时间,提高了合金在LiOH溶液中的耐腐蚀性能,但对合金在过热蒸汽中腐蚀不利;分析了显微组织与耐腐蚀性能的关系,认为第二相尺寸分布、Nb含量是影响Zr-Sn-Nb-Fe锆合金耐腐蚀性能差异的主要原因。
Studies on the correlation between microstructure and corrosion behavior of Zr-0.8Sn-1Nb-0.3Fe alloy
英文关键词:Zr-0.8Sn-1Nb-0.3Fe zirconium alloy  heat treatment  microstructure  corrosion
英文摘要:
      Zr-0.8Sn-1Nb-0.3Fe zirconium alloy sheets were prepared by different heat treatment processes, then OM and TEM were used to analyze the microstructure of the samples, and static autoclave tests were carried out in 360℃/18.6MPa/0.01mol/L LiOH solution and 400℃/10.3MPa superheated steam to investigate the corrosion behavior. The results showed that the second phase particles(SPPs) are mainly C14 type Zr(Nb,Fe)2 with a HCP structure, and the uniformity of SPPs distribution gradually become worse when the hot-rolling temperature increases from 600℃ to 700℃. Aging treatment before hot-rolling not only improved the uniformity of SPPs distribution, but also promoted the diffusion of Nb, which increased the amount of βNb SPPs. Extension of final annealing time had little influence on size and distribution of the SPPs, but increased the Nb/Fe ratio in the SPPs. After long time corrosion tests, the corrosion resistance became worse when the hot-rolling temperature increased in both corrosion conditions. Aging treatment before hot-rolling could increase the corrosion resistance. Extension of final annealing time also could increase the corrosion resistance in LiOH solution, but decrease the corrosion resistance in superheated steam. The relationship between microstructure and corrosion resistance was discussed, and the size, distribution and the Nb content of SPPs were considered to be the main reason for the difference of the corrosion resistance of Zr-Sn-Nb-Fe zirconium alloys.
作者单位E-mail
杨忠波 中国核动力研究设计院 yangzhongb@mails.ucas.ac.cn 
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