| Preparation of CuCr alloys by thermit-reduction electromagnetic stirring |
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| 作者姓名： | Zhihe Dou Tingan Zhang Haien Yu Liping Niu Xiaoli Jiang and Huan Yang School of Materials and Metallurgy Northeastern University Shenyang China |
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| 作者单位： | Zhihe Dou，Tingan Zhang，Haien Yu，Liping Niu，Xiaoli Jiang，and Huan Yang School of Materials and Metallurgy，Northeastern University，Shenyang 110004，China |
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| 摘 要： | The influences of the additive CaF2, different molds, mold pre-heating temperature, electromagnetic stirring, and alloying elements on CuCr have been investigated respectively during the preparation of CuCr alloys by thermit-reduction electromagnetic stirring. The results indicate that the reasonable reactant mass ratio of CuO: Cr2O3: Al is 100:140:160; CaF2 can reduce the solidifica- tion point of slags to improve the metal separating efficiency from slags; the crystal particles become thinner because of the high cooling velocity in the metal mold; while casting in the graphite mold, the casting properties of CuCr improve with the increase of pre-heating temperature; the compact alloys are prepared at 500°C; electromagnetic stirring can prevent the growth of dendrite crys- tal into refine crystal particles, as well as homogenize Cu and Cr to improve the CuCr properties; the optimal stirring time is 7 min; when the alloying elements Ni and Co are added to the reactants, elements Cu and Cr can distribute evenly but the crystal particles become thick.
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| 关 键 词： | 触点材料 CuCr合金 铝热剂 电磁 |
| 收稿时间： | 24 December 2006 |
Preparation of CuCr alloys by thermit-reduction electromagnetic stirring |
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| Zhihe Dou,Tingan Zhang,Haien Yu,Liping Niu,Xiaoli Jiang,and Huan Yang School of Materials and Metallurgy,Northeastern University,Shenyang ,China.Preparation of CuCr alloys by thermit-reduction electromagnetic stirring[J].Journal of University of Science and Technology Beijing,2007,14(6):538-542. |
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| Authors: | Zhihe Dou Tingan Zhang Haien Yu Liping Niu Xiaoli Jiang Huan Yang |
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| Affiliation: | School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China |
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| Abstract: | The influences of the additive CaF2, different molds, mold pre-heating temperature, electromagnetic stirring, and alloying elements on CuCr have been investigated respectively during the preparation of CuCr alloys by thermit-reduction electromagnetic cation point of slags to improve the metal separating efficiency from slags; the crystal particles become thinner because of the high cooling velocity in the metal mold; while casting in the graphite mold, the casting properties of CuCr improve with the increase of pre-heating temperature; the compact alloys are prepared at 500℃; electromagnetic stirring can prevent the growth of dendrite crystal into refine crystal particles, as well as homogenize Cu and Cr to improve the CuCr properties; the optimal stirring time is 7 min;when the alloying elements Ni and Co are added to the reactants, elements Cu and Cr can distribute evenly but the crystal particles become thick. |
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| Keywords: | contact material CuCr alloy thermit reduction electromagnetic stirring additive |
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