Preparation of CuCr alloys by thermit-reduction electromagnetic stirring

查看全文 作　　者：Zhihe Dou Tingan Zhang Haien Yu Liping Niu Xiaoli Jiang Huan [1]Yang

机构地区：[1]School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

出　　处：《Journal of University of Science and Technology Beijing》索引2007年第14卷第6期,共5页

基　　金：This work was financially supported by the National Natural Science Foundation of China (No.50374026, 50644016) 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. 关键词：触点材料 CUCR合金铝热剂电磁

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Preparation of CuCr alloys by thermit-reduction electromagnetic stirring

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