Two new Cu-Cr alloy contact materials
Two new Cu-Cr alloy contact materials
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两种新型铜铬合金触头材料
DOI：
10.1109/deiv.2000.879092
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Yu
中科院分区：
文献类型：
--
作者：
B. Miao;Yan Zhang;Yumin Zhao;Guoxun Liu;Shenlin Ding;Yu
研制了真空铸造Cu-25 Cr合金和激光细化Cu-50 Cr表面合金两种新型触头材料。扫描电镜背散射电子像和能谱分析表明，两种合金均具有细小的Cr枝晶和Cu基体，成分分布均匀，Cu和Cr相界面结合良好，Cr和Cu相在室温下互溶度高。同时，测定了两种合金触头材料的相对密度、维氏硬度和电导率。38 kV 25 kA标准真空开断试验和38kV31.5kA超负荷试验结果表明，用这两种新合金材料制造的灭弧室触头的真空开断性能上级同成分的粉末冶金触头。因此，采用这两种新型Cu-Cr合金材料制作真空灭弧室触头，可望实现真空灭弧室的高性能、节能和小型化。
Two new contact materials, vacuum casting Cu-25Cr alloy and a laser refining Cu-50Cr surface alloy, have been developed. Examined by the backscattered electron imaging of scanning electron microscopy and attached energy dispersive X-ray spectrometer, it is shown that both alloys are uniform and have very fine Cr-dendrites surrounded by Cu-matrix, homogeneous composition distribution, good cohesive interface between Cu and Cr phases and high mutual solubility of Cr and Cu phases at room temperature. Meanwhile, the relative density, Vickers hardness and electrical conductivity of the two alloy contact materials were measured. The results of standard vacuum interruption test at 38 kV 25 kA and then overfulfilled test at 38 kV 31.5 kA, have shown that the vacuum interruption performance of the interrupter contacts made from the two new alloy materials are superior to that of the powder metallurgy contacts with the same composition. Therefore, it is expected that high performance, energy saving and minimum size of the vacuum interrupters will be realized if the two new Cu-Cr alloy materials are adopted to make the contacts in practice.