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Influence of different treatment processes on microstructure and properties of Cu-Ni-Co-Si alloy
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Affiliation:

1.NingBo XingYe Sheng Tai Group Co Ltd,Provincial enterprise technology center,Zhejiang,NingBo;2.State Key laboratory ofSbiological metallurgy,General Research Institute for Nonferrous Metals,Beijing

Clc Number:

TG146.1

Fund Project:

National Key R&D Program of China (2016YFB0301300),National Natural Science Foundation of China (51601017 and 51401026)

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    Abstract:

    The influence of different treatment processes on microstructure and properties of Cu-Ni-Co-Si alloy were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution electron microscopy (HRTEM). The physical properties were tested as well. The results show that a large number of (Ni、Co)2Si large phases with orthorhombic structure and few of little (Ni、Co)2Si phase are found in the Cu-Ni-Co-Si alloy when the alloy is quenched on-line and aged treatment, which is ascribed to the low strength of the alloy. The relation curve between Vickers hardness and aging time exhibit a single peak and the electrical conductivity firstly rapid increase, then slowly raise, finally trended to stable as the aging time rise, when the Cu-Ni-Co-Si alloy is treated by solution and aging treatment and solution, cold deformation and aging treatment, respectively. Meanwhile, a lot of disc-shaped (Ni、Co)2Si precipitates with orthorhombic structure are found in the above condition. These precipitates with orientation relationship with Cu matrix could be analyzed as 。

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[Peng Lijun, Ma Jimiao, Liu Xingyu, Liu Feng, Huang Guojie, Hong Songbai, Xie Haofeng, Liu Dongmei. Influence of different treatment processes on microstructure and properties of Cu-Ni-Co-Si alloy[J]. Rare Metal Materials and Engineering,2019,48(6):1969~1974.]
DOI:10.12442/j. issn.1002-185X.20170869

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History
  • Received:September 25,2017
  • Revised:January 08,2018
  • Adopted:January 08,2018
  • Online: July 26,2019
  • Published: