期刊
MATERIALS SCIENCE AND TECHNOLOGY
卷 24, 期 5, 页码 560-566出版社
TAYLOR & FRANCIS LTD
DOI: 10.1179/174328408X278466
关键词
combination electromagnetic field; horizontal direct chill casting; macrostructure; macrosegregation; 7050 aluminium alloy
Influence of combined electromagnetic field application on horizontal direct chill casting of 7050 aluminium alloy is investigated. Temperature measurement and structure observation are carried out to analyse the casting process under different electromagnetic fields. Combined electromagnetic field can reduce the harmful gravitational thermal effect in the horizontal direct chill casting process and improve the ingot properties. With application of combined electromagnetic field, temperature distribution in the melt is more uniform, sump of the ingot becomes flat and symmetric, surface quality of ingot improves markedly, grain morphology changes from feathery grains to equiaxed grains and grain size decreases. Distribution of copper and zinc in the transverse section of the ingot becomes more uniform.
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