+高级检索
高强度Cu-Ni-(Al)-Si合金的组织和性能
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金 (51271203);国家科技支撑计划(2014BAC03B05);湖南有色基金 (YSZN2013CL06)


Microstructure and Properties of Superhigh Strength Cu-Ni-(Al)-Si Alloy
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    通过光学显微镜、维氏硬度计、双臂电桥、扫描电子显微镜、透射电子显微镜等测试手段对Cu-5.2Ni-1.2Si和Cu-5.2Ni-1.5Al-1.2Si合金的组织结构和性能进行了表征与测试。结果表明:2种合金的铸态组织均为发达的树枝晶组织,包括白亮的枝晶区、非平衡凝固相粒子及中间过渡区。其中枝晶为富Cu区,凝固相为富Ni和Si区,Al元素则比较均匀地分布在铸态组织中。峰值时效后,Cu-5.2Ni-1.5Al-1.2Si合金具有比Cu-5.2Ni-1.2Si合金更高的硬度。Al元素不但促进了Ni2Si的沉淀析出,还形成了Ni3Al沉淀相,从而大大提高合金强度。2种合金的时效早期均出现了有序化,峰时效时主要为沉淀析出强化,合金具有较好的抗过时效能力

    Abstract:

    Microstructure and properties of the Cu-5.2Ni-1.2Si and Cu-5.2Ni-1.5Al-1.2Si alloy were studied by optical microscope, Vickers hardness tester, two-arm electricity bridge, scanning electron microscope and transmission electron microscope. Results show that the developed dendrite appears in the casting ingot, which can be divided into dendrite area, non-equilibrium precipitates and the middle transition region. The dendrite area is rich in Cu element, the precipitates are rich in Ni and Si elements, and the Al element is distributed in the ingot evenly. After the appropriate thermo-mechanical treatment, the hardness of Cu-5.2Ni-1.5Al-1.2Si alloy is higher than that of Cu-5.2Ni-1.2Si alloy, and Ni2Si precipitates contribute to the main strength. Al element promotes the Ni2Si precipitation process. A new phase of Ni3Al is formed, which also improves the strength of the alloy effectively. Ordering transformation appears in the early state of ageing treatment, and the high strength is attributed to the precipitation particles. The designed alloy exhibits good anti-over aged capability

    参考文献
    相似文献
    引证文献
引用本文

黎三华,李 周,雷 前,汪明朴,申镭诺,潘志勇,刘会群.高强度Cu-Ni-(Al)-Si合金的组织和性能[J].稀有金属材料与工程,2015,44(6):1427~1431.[Li Sanhua, Li Zhou, Lei Qian, Wang Mingpu, Shen Leinuo, Pan Zhiyong, Liu Huiqun. Microstructure and Properties of Superhigh Strength Cu-Ni-(Al)-Si Alloy[J]. Rare Metal Materials and Engineering,2015,44(6):1427~1431.]
DOI:[doi]

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2014-06-14
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2016-01-04
  • 出版日期: