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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Microstructure and properties of Cu-0.6Cr alloy after
vacuum continuous casting
TSAI De-chang(蔡德昌)1, HWANG Weng-sing(黄文星)1, CHEN Siang-yong(陈向永)2,
KANG Jin-sing(康进兴)2, JIANG Cheng-xue(蒋承学)2

1. Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, China;
2. Metal Industries Research & Development Centre, Kaohsiung 81160, China

Abstract:To promote the solution of chromium in copper and the purity of copper-chromium (Cu-Cr) alloy, vacuum continuous casting (VCC) process was employed to fabricate the Cu-Cr alloy required for electrode material. Cu-0.6Cr (containing 0.6%(mass fraction) chromium) alloy bar with a diameter of 12 mm was cast with a constant rate of 250 mm/min. The microstructure, mechanical properties, and physical properties were discussed. After solid solution strengthening and aging treatments, Cu-0.6Cr alloy fabricated by VCC process has higher tensile strength (σ≥314 MPa), elongation rate (δ≥34%), conductivity (≥80.5% IACS), and hardness (80 HRB) compared to the as-cast alloy.

 

Key words: Cu-Cr alloy; vacuum continuous casting; solid solution treatment; aging treatment; conductivity

ISSN 1672-7029
CN 43-1423/U

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