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Effect of High-Pressure Aging Treatment on Microstructure and Properties of Cu-51.15W-0.24Cr Alloy
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1.School of Materials Science and Engineering, North University of China, Taiyuan 030051, China;2.GRIPM Advanced Materials Co., Ltd, General Research Institute for Nonferrous Metals, Beijing 100088, China;3.National Innovation Institute of Defense Technology, Academy of Military Science PLA China, Beijing 100071, China;4.Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China

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Fund Project:

National Natural Science Foundation of China (51801189, 51804279); Shanxi Province Science Foundation for Youths (201801D221145, 201801D221150, 201801D221153); Major Science and Technology Projects of Shanxi Province (20181101002); Science and Technology Innovation Project of Colleges and Universities in Shanxi Province (2019L0514, 2019L0526)

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    Abstract:

    Aiming at solving the problem of poor strength, low conductivity and thermal conductivity of Cu-W alloys, high pressure aging treatment was conducted to reinforce Cu-51.15W-0.24Cr alloy. The microstructure, hardness, thermal conductivity and conductivity of the alloy after high pressure aging treatment and normal pressure aging treatment were compared. The results show that high pressure aging treatment can increase the compactness of Cu48.61W51.15Cr0.24 alloy, eventually resulting in more dispersed distribution and finer grain size of Cr phase during the aging treatment, and improving the hardness and thermal conductivity of the alloy. After solution treatment at 960 °C for 1 h and aging at 500 °C for 1 h under a pressure of 3 GPa, the hardness, thermal diffusivity and resistivity are determined to be 1540 MPa, 0.5236 cm2·s-1 and 4.458×10-8 Ω·m, respectively, which are 17.56% and 10.74% higher than and 4.85% lower than those of alloy under normal pressure, respectively. Therefore, high pressure aging treatment can be an effective way to improve mechanical properties and to reduce resistivity of Cu-51.15W-0.24Cr alloy.

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[Gu Tao, Zhang Shuaixin, Zhao Yuhong, Fu Dongxing, Zhang Zhibin, Liu Jianhua, Hou Hua. Effect of High-Pressure Aging Treatment on Microstructure and Properties of Cu-51.15W-0.24Cr Alloy[J]. Rare Metal Materials and Engineering,2021,50(12):4224~4229.]
DOI:10.12442/j. issn.1002-185X. E20200051

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History
  • Received:October 13,2020
  • Revised:November 20,2020
  • Adopted:December 22,2020
  • Online: December 30,2021
  • Published: December 24,2021