Microstructure and properties of Cu-Cr-Zr alloy fabricated by up-drawn casting-continuous extrusion

被引：0
|
作者：
Zhang W.-J. [1 ,2 ,3 ]
Xie H.-F. [1 ]
Peng L.-J. [1 ]
Huang G.-J. [1 ]
Yang Z. [1 ]
Mi X.-J. [1 ]
Huang L. [1 ,2 ]
Wang L.-M. [3 ]
机构：
[1] State Key Laboratory of Nonferrous Metals & Processes, GRIMAT Engineering Institute Co., Ltd., Beijing
[2] General Research Institute for Nonferrous Metals, Beijing
[3] GRIPM Advanced Materials Co., Ltd., Beijing
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 05期
关键词：
Aging treatment; Cu-0.88Cr-0.14Zr alloy; Electrical conductivity; Hardness; Up-drawn casting-continuous extrusion;
D O I：
10.11817/j.ysxb.1004.0609.2021-39793
中图分类号：
学科分类号：
摘要：
Cu-0.88Cr-0.14Zr (mass fraction) alloy was prepared by up-drawn casting and continuous extrusion technology, and then the extruded bar was aged at different temperature for different time. The evolution of microstructure and properties of the alloy treated by different processes were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron back-scattered diffraction technology (EBSD), and so on. The results show that the Cu-Cr-Zr alloy casting rod billet has severe shear deformation and dynamic aging happened during continuous extrusion process, the grains are refined obviously and the Cr phases with size of 15-20 nm are precipitated. Compared to as-cast alloys, the electrical conductivity and hardness of the as-extruded alloy increase by 28.6% IACS and 49.6 HV, respectively. The peak aging of the extruded alloy after homogenization annealing at (925℃, 12 h) and solution treatment at (1000℃, 1 h) is determined to be (475℃, 3 h). The Cr phase with average grain size of 2.68 nm is precipitated in the matrix after peak aging, and the electrical conductivity and hardness can reach 73% IACS and 155 HV, respectively. © 2021, Science Press. All right reserved.
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页码：1168 / 1175
页数：7
相关论文
共 25 条
  • [1] LIU J B, HOU M L, YANG H Y, Et al., In-situ TEM study of the dynamic interactions between dislocations and precipitates in a Cu-Cr-Zr alloy, Journal of Alloys & Compounds, 765, pp. 560-568, (2018)
  • [2] FENG H, JIANG H C, YAN D S, Et al., Effect of continuous extrusion on the microstructure and mechanical properties of a CuCrZr alloy, Materials Science and Engineering A, 582, pp. 219-224, (2013)
  • [3] SUN L X, TAO N R, LU K., A high strength and high electrical conductivity bulk CuCrZr alloy with nanotwins, Scripta Materialia, 99, pp. 73-76, (2015)
  • [4] XIA C D, JIA Y L, ZHANG W, Et al., Study of deformation and aging behaviors of a hot rolled-quenched Cu-Cr-Zr-Mg-Si alloy during thermomechanical treatments, Materials & Design, 39, pp. 404-409, (2012)
  • [5] ZHANG Y, VOLINSKY A A, TRAN H T, Et al., Aging behavior and precipitates analysis of the Cu-Cr-Zr-Ce alloy, Materials Science and Engineering A, 650, pp. 248-253, (2016)
  • [6] PENG L J, XIE H F, HUANG G J, Et al., Dynamic of phase transformation in Cu-Cr-Zr alloy, Advance Materials Research, 887, 888, pp. 333-337, (2014)
  • [7] MISHNEV R, SHAKHOVA I, BELYAKOV A, Et al., Deformation microstructures, strengthening mechanisms, and electrical conductivity in a Cu-Cr-Zr alloy, Materials Science and Engineering: A, 629, pp. 29-40, (2015)
  • [8] FU H D, XU S, LI W, Et al., Effect of rolling and aging processes on microstructure and properties of Cu-Cr-Zr alloy, Materials Science and Engineering A, 700, pp. 107-115, (2017)
  • [9] LI Hua-qing, XIE Shui-sheng, WU Peng-yue, Et al., Vacuum smelting casting process for Cu-Cr-Zr-Mg alloy, Special Casting and Nonferrous Alloys, 26, 7, pp. 387-399, (2006)
  • [10] WENG Yuan-hui, CHEN Gang, WU Yuan, Et al., Melting loss and defects of Cu-Cr-Zr alloy prepared in non-vacuum condition, Foundry Technology, 34, 8, pp. 1021-1023, (2013)
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