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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 2    September 2009

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Properties of vacuum cast CuCr25 and CuCr25Te contact material
XIU Shi-xin(修士新)1, YANG Ren(杨 韧)2, XUE Jun(薛 军)3, WANG Jin-xing(汪金星)3

1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China;
2. Shaanxi Electric Power Research Institute, Xi’an 710054, China;
3. Shaanxi Electric Power Company, Xi’an 710004, China

Abstract:The CuCr25 and CuCr25Te contact materials were manufactured by vacuum casting process. The microstructures of two alloys were observed by metallographic microscope, the electrical conductivity, density and hardness were measured. The tensile test was done by universal testing machine while the fractography was observed by SEM, the breaking current tests were carried out in Weil Synthetic Circuit with arc-igniting branch in Xi’an Jiaotong University. The results show that the microstructures and physical parameters change after adding Te element. The tensile strength decreases and the toughness turns bad, which is propitious to improve the anti-welding property. But the breaking current capacity of CuCr25Te alloy is inferior to CuCr25 alloy. Thus, adding Te element has both advantages and disadvantages on main properties of CuCr contact material.

 

Key words: Te; CuCr contact material; vacuum cast

ISSN 1672-7029
CN 43-1423/U

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