广西师范大学学报（自然科学版） ›› 2016, Vol. 34 ›› Issue (3): 95-101.doi: 10.16088/j.issn.1001-6600.2016.03.013

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热处理工艺对镍基纳米晶合金材料组织结构的影响

郭润江1, 孙衍乐1, 单默昆1, 付立铭1,2, 郭平生3, 单爱党1,2   

  1. 1.上海交通大学材料科学与工程学院,上海200240;
    2. 上海交通大学环境科学与工程学院,上海200240;
    3. 广西师范大学物理科学与技术学院,广西桂林541004
  • 收稿日期:2016-02-23 出版日期:2016-09-30 发布日期:2018-09-17
  • 通讯作者: 单爱党(1965—),男,江苏徐州人,上海交通大学教授。E-mail:adshan@sjtu.edu.cn
  • 基金资助:
    国家“十二五”水体污染控制与治理科技重大专项(2014ZX07214-002)

Effect of Annealing on Microstructure of a Ni-based Nano-grained Alloy

GUO Runjiang1, SUN Yanle1, SHAN Mokun1, FU Liming1,2, GUO Pingsheng3, SHAN Aidang1,2   

  1. 1.College of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. College of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    3. College of Physical and Technology, Guangxi Normal University, Guilin Guangxi 541004, China
  • Received:2016-02-23 Online:2016-09-30 Published:2018-09-17

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摘要： 本研究通过对一种镍基合金进行大变形异步与同步轧制,制备了纳米组织材料,研究了退火处理对纳米组织镍基合金材料的组织与力学性能的影响。结果表明,大变形轧制后材料的晶粒细化至约50 nm,大变形轧制后的材料出现(2 2 0)晶面择优取向,退火温度对该取向影响不大。所制备的超细晶材料具有良好的组织热稳定性,在700 ℃下退火,晶粒尺寸约150 nm,在800 ℃以下退火1 h,晶粒尺寸仍然能够保持在250 nm以下。分析认为,超细晶镍基合金材料的组织稳定性与γ′相的析出所起到的钉扎作用有直接关系。

关键词: 镍基合金, 大变形轧制, 纳米晶, 热处理

Abstract: Nano-grained (NG) alloy was obtained through symmetric and asymmetric rolling at room temperature.The effects of annealing on microstructure and mechanical properties of nano-grained Ni-based alloy were investigated. It was found that, after severe cold rolling, the NG material with an average grain size about 50 nm and (2 2 0) preferential orientation was fabricated. In addition, after annealing at 700 ℃, the grain size was about 150 nm and it was still below 250 nm even after annealing at 800℃, which shows that the nano-grained material has high thermal stability and is attributed to precipitation of γ′ phase.

Key words: Ni-based alloy, severe rolling, nano-grain material, heat treatment

中图分类号: 

  • TG156.24
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