The Study of Properties of Cu-0.8Cr-0.2Zr Alloy Used as Contact Materials

Abstract:

Although alloy QCr0.5 has been used as the contact materials in the high-voltage equipment extensively, but it always confronts the awkwardness of over aging in the heat treatment, and results in brittleness during the switching on and breaking process. In the present work by the technology of interalloy-adding, the Zr-containing alloy Cu-0.8Cr-0.2Zr has been prepared and investigated. The results of the microstructure and properties indicate that the alloy matrix maintains FCC microstructure and lots of Zr-containing precipitation is dispersed in the matrix uniformly. The brinell hardness, the ultimate tensile strength and the elastic modulus increase greatly, reach 140 MPa, 430 Mpa and 130 GPa respectively, meanwhile the electric conductivity maintains 75%IACS and the softening temperature is up to 550 °C.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 616-622
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.616
• Online since: December 2012
• Authors: Liu Cheng Hao, Li Juan Han, Ya Fei Li, Bao Zeng Li, Lu Ping Wang, Quan Min Zhang
• Keywords: Conductivity, Cu-0.8Cr-0.2Zr Alloy, Electric, Hardness, Interalloy-Adding, Microstructure, Tensile Strength

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