Property and thermal stability of in situ composite Cu–Cr alloy contact cable

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• 作者：Li-Ming Peng ; Xie-Min Mao ; Kuang-Di Xu and Wen-Jiang Ding
• 关键词：In situ composite ; Cu– ; Cr alloy ; Thermal stability ; M index
• 刊名：Journal of Materials Processing Technology
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：166
• 期：2
• 页码：193-198
• 全文大小：280 K

文摘

The in situ composite Cu–Cr alloy, a new type of potential electric material that can be used for contact cables, is reported in this paper. The combination property and thermal stability of the in situ composite Cu–Cr alloy were investigated. Experimental results showed that the in situ composite Cu–Cr alloy has not only high room temperature properties, including ultimate tensile strength σ_b, elongation rate 5, relative conductivity σ_r, and combination property that is scaled by M index (), but also excellent thermal stability of these properties. At room temperature, the combination property of in situ composite Cu–Cr could be up to 18.3 × 10⁶ MPa² % , which is higher than those of commonly used copper contact cables all over the world. After being heated for 3 h at 500 °C, the combination property of the in situ composite Cu–Cr alloy only decreased 3 % . In this paper, the relationship between thermal stability and strengthening mechanism of in situ composite alloy was analyzed.