刘佳,王献辉,冉倩妮,刘彦峰,李聪.Cu-3Ti-2Mg合金的时效特征[J].稀有金属材料与工程,2018,47(7):1980~1985.[Liu Jia,Wang Xianhui,Ran Qianni,Liu Yanfeng,Li Cong.Pre-deformation and Aging Characteristics of Cu-3Ti-2Mg Alloy[J].Rare Metal Materials and Engineering,2018,47(7):1980~1985.]
Cu-3Ti-2Mg合金的时效特征
投稿时间:2016-12-17  修订日期:2017-03-31
中文关键词:  铜合金  变形  相变  硬度  导电率
基金项目:
中文摘要:
      本文研究了冷变形及时效处理对Cu-3Ti-2Mg合金组织与性能的影响。采用光学显微镜(OM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、透射电子显微镜(TEM)及电子背散射衍射(EBSD)对Cu-3Ti-2Mg合金的组织和析出相进行了表征,并对其硬度和导电率进行了测试。结果表明:铸态Cu-3Ti-2Mg合金由Cu2Mg相、板条状Cu4Ti相及Cu基体组成。时效处理后析出β"-Cu4Ti相,过时效则会导致亚稳定β"-Cu4Ti相转变为稳定的Cu3Ti相。在本实验范围内,Cu-3Ti-2Mg合金的最佳热处理工艺是 700°C 保温4h后水淬,随后冷变形60%并在450 °C保温2 h炉冷。Cu-3Ti-2Mg合金的导电率及硬度分别是16.7 % IACS和328 HV。
Pre-deformation and Aging Characteristics of Cu-3Ti-2Mg Alloy
英文关键词:Cu-Ti alloy  deformation  phase transformation  hardness  electrical conductivity
英文摘要:
      The effect of cold deformation and aging on the microstructure and properties of Cu-3Ti-2Mg alloy was investigated. The microstructure and phase constituents were characterized by optical microscope (OM), scanning electron microscope (SEM), X-ray diffractometer (XRD), transmission electron microscope (TEM) and electron backscattering diffraction (EBSD), and the hardness and electrical conductivity were measured as well. The results show that the microstructure of as-cast Cu-3Ti-2Mg alloy is consisted of Cu2Mg phase, plate-like Cu4Ti phase and Cu matrix. The microstructural characterizations revealed that the β′-Cu4Ti phase precipitate from the supersaturated Cu matrix during aging. However, excessive aging causes the phase transformation from metastable, coherent β"-Cu4Ti to equilibrium, incoherent Cu3Ti phases. In the range of experiments, the optimum process for Cu-3Ti-2Mg alloy is solutized at 700 °C for 4h, cold deformation of 60%, and aging at 450 °C for 2h. The electrical conductivity and hardness of Cu-3Ti-2Mg alloy are 16.7% IACS and 328 HV, respectively.
作者单位E-mail
刘佳 西安理工大学材料科学与工程学院 liujia09200920@163.com 
王献辉 西安理工大学材料科学与工程学院  
冉倩妮 西安理工大学材料科学与工程学院  
刘彦峰 西安理工大学材料科学与工程学院  
李聪 西安理工大学材料科学与工程学院  
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