Ni、Si元素配比对Cu-Cr-Zr合金组织与性能的影响

doi:10.11896/j.issn.1005-023X.2017.06.016

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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.

Key words： Cu-Ni-Si-Cr-Zr alloy electrical conductivity hardness

Published: 02 May 2018

CLC number:

TG146

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	Articles by authors
	ZHOU Qingquan
	SHUAI Gewang
	LIU Jianbin

Cite this article:

ZHOU Qingquan,SHUAI Gewang,LIU Jianbin. Effect of Ni and Si Mass Ratio on Microstructure and Properties of Cu-Cr-Zr Alloy[J]. Materials Reports, 2017, 31(6): 76-80.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.06.016 OR http://www.mater-rep.com/EN/Y2017/V31/I6/76

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