Solidification Structure and Properties of Low Beryllium Cu-1.7Ni-0.2Co-xBe Alloy

Fang Senpeng; Chen Leping; Zhou Quan; Zhou Shuijun; Yu Yibiao

doi:10.15980/j.tzzz.2022.05.018

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Solidification Structure and Properties of Low Beryllium Cu-1.7Ni-0.2Co-xBe Alloy
Vol. 42, Issue 5, Pages: 610-613(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.05.018

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Fang Senpeng, Chen Leping, Zhou Quan, et al. Solidification Structure and Properties of Low Beryllium Cu-1.7Ni-0.2Co-xBe Alloy. [J]. Special Casting & Nonferrous Alloys 42(5):610-613(2022)
DOI：

Fang Senpeng, Chen Leping, Zhou Quan, et al. Solidification Structure and Properties of Low Beryllium Cu-1.7Ni-0.2Co-xBe Alloy. [J]. Special Casting & Nonferrous Alloys 42(5):610-613(2022) DOI： 10.15980/j.tzzz.2022.05.018.

摘要

利用OM、XRD、SEM、万能拉伸试验机和电导率测量仪等分析测试手段，对低铍Cu-1.7Ni-0.2Co-xBe合金的凝固组织和性能进行了研究。结果表明，当Be添加量在0.4%～0.7%内，随着Be添加量增加，合金的宏观组织得到不同程度的细化，二次枝晶臂间距从31.85μm减小到16.58μm;合金的抗拉强度先提高后降低，在Be添加量为0.5%时达到最大值490.4 MPa

其伸长率总体上逐渐增加；电导率先降低后增加，在Be添加量为0.5%时达到最小值，18.792 MS/m;当Be含量大于0.5%时合金中开始出现BeNi相。

Abstract

The solidification structure and properties of Cu-1.7 Ni-0.2 Co-xBe alloy with low beryllium addition were investigated by OM

XRD

SEM

universal tensile testing machine and conductivity measurement instrument. The results indicate that when the addition of Be is in the range of 0.4%～0.7%

the macrostructure of the alloy is refined with the increase of Be addition

and the secondary dendrite arm spacing is decreased continuously from 31.85 μm to 16.58 μm. The tensile strength of the alloy is increased at first and then decreased

which reaches the maximum of 490.4 MPa with the 0.5% addition of Be

and the elongation is increased gradually. The conductivity of the alloy is decreased at first and then increased

which reaches the minimum value of 18.792 MS/m when the addition of Be is 0.5%. BeNi phase can be observed in the alloy when the addition of Be is more than 0.5%.