Effects of Melting Process on Microstructure and Thermal Conductivity of Cu-Ni-Nb Alloy

Zhang Junzhe; Lu Baiping; Yang Wei

doi:10.15980/j.tzzz.2014.07.030

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Effects of Melting Process on Microstructure and Thermal Conductivity of Cu-Ni-Nb Alloy
Vol. 34, Issue 7, Pages: 774-777(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.07.030

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[1]张俊哲,卢百平,杨伟.熔炼工艺对Cu-Ni-Nb合金组织及导热性能的影响[J].特种铸造及有色合金,2014,34(07):774-777.

Zhang Junzhe, Lu Baiping, Yang Wei. Effects of Melting Process on Microstructure and Thermal Conductivity of Cu-Ni-Nb Alloy. [J]. Special Casting & Nonferrous Alloys 34(7):774-777(2014)
[1]张俊哲,卢百平,杨伟.熔炼工艺对Cu-Ni-Nb合金组织及导热性能的影响[J].特种铸造及有色合金,2014,34(07):774-777. DOI： 10.15980/j.tzzz.2014.07.030.

Zhang Junzhe, Lu Baiping, Yang Wei. Effects of Melting Process on Microstructure and Thermal Conductivity of Cu-Ni-Nb Alloy. [J]. Special Casting & Nonferrous Alloys 34(7):774-777(2014) DOI： 10.15980/j.tzzz.2014.07.030.

摘要

采用真空电弧熔炼工艺制备了Cu-Ni-Nb合金

研究了Nb的加入方式和加入量对Cu-Ni-Nb合金组织、热导率和熔点的影响。结果表明

采用一次熔炼法

难以将高熔点Nb熔入Cu-Ni合金。采用二次熔炼法

以Nb-Ni中间合金方式可使Nb熔入Cu-Ni合金

生成Ni3Nb、Ni8Nb等第二相。Cu-Ni-Nb合金热导率随Nb含量的增加而提高

合金熔点随着Nb含量的增加而下降。Cu-20Ni-3Nb合金热导率为43.23 W/（m·K）

熔点为1 146℃。

Abstract

Effects of adding method and addition content of niobium element on the microstructure

thermal conductivity and melting point of the Cu-Ni-Nb alloy were investigated by vacuum arc melting process. The results show that it is difficult to mix the high melting point element Nb into Cu-Ni alloy only by one smelting. However

the Nb element can be dissolved into the Cu-Ni alloy in style of Nb-Ni master alloy by using two steps melting.Some new phases such as Ni3Nb

Ni8Nb are generated. In addition

with the increase of Nb content

the thermal conductivity the Cu-Ni-Nb alloy prepared is increased while the melting point of the alloy is decreased. The thermal conductivity of Cu-20Ni-3Nb alloy reaches 43. 23 W /（ m·K）

and the melting point is 1 146 ℃.