Effect of electromagnetic field on macrosegregation of continuous casting 7075 alloy
(Key Laboratory of Ministry of Education for Electromagnetic Processing of Materials,
Northeastern University, Shenyang 110004, China)
Northeastern University, Shenyang 110004, China)
Abstract: The effect of electromagnetic field on macrosegregation of continuous casting aluminum alloy was studied. 7075 aluminum alloy ingot with diameter of 200mm was produced by electromagnetic casting. Magnitude of coil current was varied from 100A to 600A, and frequency from 10Hz to 100Hz. Variation of element content along the radius of ingot was examined by means of chemical analysis. The results show that electromagnetic casting process can effectively reduce the macrosegregation, and electromagnetic frequency has a great influence on element distribution along the radius of ingot. When frequency is 30Hz, macrosegregation is eliminated completely.
Key words: electromagnetic field; continuous casting; macrosegregation; aluminum alloy