Influence of Cerium and Yttrium on Cu-Cr-Zr Alloys
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第2期
论文作者：Cheng Lei Mi Xujun Liu Yong Xie Shuisheng Wu Pengyue Li Huaqing
Key words：Cu-Cr-Zr alloys; softening temperature; hardness; conductivity; rare earth elements;
Abstract: Testing results shows that alloying with Ce and Y improves the hardness and softens temperature of cold worked Cu-Cr-Zr alloys obviously, while the conductivity was fluctuant with the variation of RE content. Observation and analysis indicate that micro-dosage RE elements helps to refine microstructure and morphology of Cu-Cr-Zr-RE alloys, suppress microstructure coarsening and improves homogeneous level of Cu-Cr-Zr alloys. Alloying with 0.01% Ce causes about 1% IACS increment of conductivity, and reduces about 2%～3.5% IACS conductivity after alloying with 0.03%～0.04% RE (Ce or Ce+Y) for Cu-Cr-Zr alloys. The microstructure of as-cast Cu-Cr-Zr alloy is refined after alloying with 0.01% Ce while the plasticity is improved slightly. Alloying with 0.01%～0.04% RE improves the softening temperature of deformed Cu-Cr-Zr alloys about 20～40 K; hardness is also improved about 20～35 HV. Test data indicate that alloying with Ce+Y raises softening temperature and hardness of Cu-Cr-Zr alloys more notably than alloying with pure Ce.
Cheng Lei1，Mi Xujun1，Liu Yong2，Xie Shuisheng1，Wu Pengyue1，Li Huaqing1
(1.General Research Institute for Nonferrous Metals, State Key Laboratory for Fabrication and Processing of Nonferrous Metals, Beijing 100088, China;
2.School of Materials Science & Engineering, Henan University of Science & Technology, Luoyang 471003, China)
Abstract:Testing results shows that alloying with Ce and Y improves the hardness and softens temperature of cold worked Cu-Cr-Zr alloys obviously, while the conductivity was fluctuant with the variation of RE content. Observation and analysis indicate that micro-dosage RE elements helps to refine microstructure and morphology of Cu-Cr-Zr-RE alloys, suppress microstructure coarsening and improves homogeneous level of Cu-Cr-Zr alloys. Alloying with 0.01% Ce causes about 1% IACS increment of conductivity, and reduces about 2%～3.5% IACS conductivity after alloying with 0.03%～0.04% RE (Ce or Ce+Y) for Cu-Cr-Zr alloys. The microstructure of as-cast Cu-Cr-Zr alloy is refined after alloying with 0.01% Ce while the plasticity is improved slightly. Alloying with 0.01%～0.04% RE improves the softening temperature of deformed Cu-Cr-Zr alloys about 20～40 K; hardness is also improved about 20～35 HV. Test data indicate that alloying with Ce+Y raises softening temperature and hardness of Cu-Cr-Zr alloys more notably than alloying with pure Ce.
Key words:Cu-Cr-Zr alloys; softening temperature; hardness; conductivity; rare earth elements;
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