Effect of Nickel on the Microstructures and Properties of Heat-resistant Cast Cu-Ni-Al Alloy

Chen Jiliang; Luo Zongqiang; Zhang Weiwen; Li Yuanyuan

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Effect of Nickel on the Microstructures and Properties of Heat-resistant Cast Cu-Ni-Al Alloy
Issue S1, Pages: 263-265(2008)
Published： 2008 ，
DOI：

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[1]陈继亮,罗宗强,张卫文,李元元.镍对耐热铸造Cu-Ni-Al合金组织和性能的影响[J].特种铸造及有色合金,2008(S1):263-265.

Chen Jiliang, Luo Zongqiang, Zhang Weiwen, et al. Effect of Nickel on the Microstructures and Properties of Heat-resistant Cast Cu-Ni-Al Alloy. [J]. Special Casting & Nonferrous Alloys (S1):263-265(2008)
[1]陈继亮,罗宗强,张卫文,李元元.镍对耐热铸造Cu-Ni-Al合金组织和性能的影响[J].特种铸造及有色合金,2008(S1):263-265. DOI：

Chen Jiliang, Luo Zongqiang, Zhang Weiwen, et al. Effect of Nickel on the Microstructures and Properties of Heat-resistant Cast Cu-Ni-Al Alloy. [J]. Special Casting & Nonferrous Alloys (S1):263-265(2008) 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对一种耐热铸造Cu-Ni-Al合金组织和性能的影响。研究结果表明

随着合金元素Ni质量分数从10%增加到25%

室温下合金硬度HBS提高了25.2%

σb提高了82%

σ0.2提高了70.5%。500℃下的HBS提高了40%。镍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

The effect of Ni on the microstructures and mechanical properties of heat-resistant cast Cu-Ni-Al alloy was analyzed by using optical microscope

EMPA

hardness and compression test. The results show that the Brinell hardness HB

ultimate compression strength σbc and yield compression strength σ0.2pc of the alloy at room temperature increase by 25.2%

82% and 70.5%

respectively

with the increase in Ni content from 10% to 25%. Meanwhile

the Brinell hardness of the alloy at the elevated temperature 500 ℃ increases by 40%. The improvement of the mechanical properties of the alloy by increasing Ni content is attributed to the solution strength of Ni in the copper matrix and second-phase strength of the formation of some complex compounds.