Abstract: Ni and Si were added in Cu-Cr-Zr alloy to prepare Cu-0.6Cr-0.15Zr, Cu-2.8Ni-0.7Si-0.6Cr-0.15Zr (w(Ni)/w(Si)=4∶1), Cu-2.8Ni-0.9Si-0.6Cr-0.15Zr (w(Ni)/w(Si)<4∶1) and Cu-2.8Ni-0.56Si-0.6Cr-0.15Zr (w(Ni)/w(Si) > 4∶1) four kinds of alloy. The influence of Ni, Si and their mass ratio on the microstructure and properties of the alloy were studied. The results indicated that Si and Ni could refine the microstructure of the alloy and enhance the mechanical properties of the alloy at high temperature. In the early aging stage, the CrSi2 phase was precipitated, and CrSi2, Ni2Si, ZrCrSi2 phases were precipitated at the later aging stage, with elongated, oval and round shapes. After aging treatment, the addition of Ni,Si elements resulted in an increase of the alloy′s hardness from 131HV to higher than 240HV, compared to Cu-0.6Cr-0.15Zr alloy. The electrical conductivity of the alloy decreased from 88%IACS to about 40%IACS. The Ni to Si mass ratio had limited effect on the conductivity of the alloy (between 4%IACS-9%IACS) and the change of peak value of the hardness was between 20HV-30HV.
周清泉, 帅歌旺, 刘建彬. Ni、Si元素配比对Cu-Cr-Zr合金组织与性能的影响[J]. 《材料导报》期刊社, 2017, 31(6): 76-80.
ZHOU Qingquan, SHUAI Gewang, LIU Jianbin. Effect of Ni and Si Mass Ratio on Microstructure and Properties of Cu-Cr-Zr Alloy. Materials Reports, 2017, 31(6): 76-80.
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