Effects of Ni on the Microstructure and Properties of Heat Resistant Cast Cu-Ni-Al Alloy

Chen Jiliang; Luo Zongqiang; Zhang Weiwen; Li Yuanyuan

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Effects of Ni on the Microstructure and Properties of Heat Resistant Cast Cu-Ni-Al Alloy
Vol. 29, Issue 5, Pages: 483-485(2009)
Published： 2009 ，
DOI：

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[1]陈继亮,罗宗强,张卫文,李元元.Ni对耐热铸造Cu-Ni-Al合金组织和性能的影响[J].特种铸造及有色合金,2009,29(05):483-485+392.

Chen Jiliang, Luo Zongqiang, Zhang Weiwen, et al. Effects of Ni on the Microstructure and Properties of Heat Resistant Cast Cu-Ni-Al Alloy. [J]. Special Casting & Nonferrous Alloys 29(5):483-485(2009)
[1]陈继亮,罗宗强,张卫文,李元元.Ni对耐热铸造Cu-Ni-Al合金组织和性能的影响[J].特种铸造及有色合金,2009,29(05):483-485+392. DOI：

Chen Jiliang, Luo Zongqiang, Zhang Weiwen, et al. Effects of Ni on the Microstructure and Properties of Heat Resistant Cast Cu-Ni-Al Alloy. [J]. Special Casting & Nonferrous Alloys 29(5):483-485(2009) DOI：

摘要

采用压缩试验、硬度测试、金相观察和电子探针分析等手段分析了合金元素Ni对耐热铸造Cu-Ni-Al合金组织和性能的影响。结果表明

随着合金元素Ni含量（质量分数）从10%增加到25%

室温硬度（HB）提高了25.2%

σb提高了82%

σ0.2提高了70.5%。500℃时硬度（HB）提高了40%。Ni改变合金力学性能的主要原因是Ni在铜基体中的固溶强化作用和与其他合金元素形成化合物产生的第二相强化作用。

Abstract

Effects of Ni on the microstructure and mechanical properties of heat resistant cast Cu-Ni-Al alloy were analyzed by optical microscope

EMPA（electron micro-probe analysis）

hardness and compression testing.The results indicate that with Ni content increasing from 10% to 25%

the hardness（HB）

tensile strength

yield strength of the alloy at room temperature are increased by 25.2%

82%

70.5%

respectively

while hardness of the alloy is increased by 40% at 500 ℃.Solution strengthening effects of Ni in Cu matrix and second phase strengthening effects of Ni formed with other alloying element are responsible for the improvement of mechanical properties of the heat resistant cast Cu-Ni-Al alloy.