Revealing the influential mechanism of electromagnetic vibration on the bulk solidification and the upward continuous casting of Cu-15Ni-8Sn Alloy  

作　　者：Ganpei Tang Zhe Sun Zhongze Lin Tianxiang Zheng Bangfei Zhou Peijian Shi Qiang Li Chunmei Liu Haibiao Lu Zhe Shen Biao Ding Yunbo Zhong 

机构地区：[1]State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China

出　　处：《Journal of Materials Science & Technology》2024年第22期166-182,共17页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51904184,52204392,52274385,and 52204347);the National Key Research and Development Program of China(No.2022YFC2904900);the Young Elite Scientists Sponsorship Program by CAST(No.2022QNRC001).

摘　　要：The effect of electromagnetic vibration(EMV)on the solidification structure of Cu-15Ni-8Sn alloy during bulk solidification and the upward continuous casting was investigated experimentally and numerically.The bulk solidification results indicated that in the case of B=0.5 T and J=1.27×10^(5)A/m^(2),the most effective grain refinement frequency was at f=10 Hz,where fine non-dendrites were obtained.The solidification structure became coarser at f=0.1 Hz and f=1 Hz compared to the case of f=10 Hz,while no grain refinement was observed at f=100 Hz.The numerical simulations showed that at f=10 Hz,the strong melt convection surrounding the primary solid phase promotes the diffusion of the rejected solute,consequently,resulting in a reduction of the solute boundary layer,which leads to the decrease in the nucleation-free zone(NFZ)and the grain refinement.Additionally,the most effective grain refinement frequency transformed to 1 Hz when the electromagnetic force was reduced by five times.Moreover,we proposed that the most effective grain refinement frequency range aligns with the EMV-induced relative displacement in the range of 10^(2)–10^(3)μm.Finally,the upward continuous casting was conducted to validate the relative displacement range,and the experimental results matched well.

关 键 词：Electromagnetic vibration Grain refinement Solidification structure Upward continuous casting 

分 类 号：TG146.23[一般工业技术—材料科学与工程]