Nb含量对Cu-Ni-Nb合金组织与熔点及导热性能的影响
发布时间：2018-11-24 16:47
【摘要】：采用真空电弧熔炼工艺制备了Cu-Ni-Nb合金,研究了Nb含量对Cu-Ni-Nb合金组织、合金熔点及热导率的影响。结果表明,Cu-Ni-Nb合金基体为Cu0.81Ni0.19,第二相为NbNi3;当Ni、Nb质量比为(6~10)∶1时,Cu-Ni-Nb合金第二相形态全部为片状;当Ni、Nb质量比为(2~4)∶1时,Cu-Ni-Nb合金第二相为片状和球状。随着Nb含量的增加,Cu-NiNb合金基体中Ni原子固溶度降低,合金熔点下降,而热导率提高。Cu-20Ni-5Nb合金第二相为细小的片状和球状,均匀分布在基体中,第二相体积分数为19.2%,合金熔点为1 134.92℃,热导率为45.25 W/(m·K),可满足铸Cu冷却水套的制造和使用要求。
[Abstract]:Cu-Ni-Nb alloy was prepared by vacuum arc melting. The effect of Nb content on the microstructure, melting point and thermal conductivity of Cu-Ni-Nb alloy was studied. The results show that when the second phase of Cu-Ni-Nb alloy is Cu0.81Ni0.19, second phase is NbNi3;, when the mass ratio of Ni,Nb is (6 ~ 10): 1, the second phase morphology of Cu-Ni-Nb alloy is all flake. When the mass ratio of Ni,Nb is (2 ~ 4): 1, the second phase of Cu-Ni-Nb alloy is flaky and spherical. With the increase of Nb content, the solution of Ni atoms in Cu-NiNb alloy matrix decreases, the melting point of the alloy decreases, and the thermal conductivity increases. The second phase of Cu-20Ni-5Nb alloy is fine flake and spherical, and distributes uniformly in the matrix. The volume fraction of the second phase is 19.2, the melting point of the alloy is 1 134.92 鈩，
本文编号：2354393
[Abstract]:Cu-Ni-Nb alloy was prepared by vacuum arc melting. The effect of Nb content on the microstructure, melting point and thermal conductivity of Cu-Ni-Nb alloy was studied. The results show that when the second phase of Cu-Ni-Nb alloy is Cu0.81Ni0.19, second phase is NbNi3;, when the mass ratio of Ni,Nb is (6 ~ 10): 1, the second phase morphology of Cu-Ni-Nb alloy is all flake. When the mass ratio of Ni,Nb is (2 ~ 4): 1, the second phase of Cu-Ni-Nb alloy is flaky and spherical. With the increase of Nb content, the solution of Ni atoms in Cu-NiNb alloy matrix decreases, the melting point of the alloy decreases, and the thermal conductivity increases. The second phase of Cu-20Ni-5Nb alloy is fine flake and spherical, and distributes uniformly in the matrix. The volume fraction of the second phase is 19.2, the melting point of the alloy is 1 134.92 鈩，
本文编号：2354393
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