Direct chill casting of Φ500mm ZK60 magnesium alloy billets under low frequency electromagnetic field
Effects of low frequency electromagnetic field on surface quality, microstructure and hot-tearing tendency of direct chill casting of Φ500mm ZK60 magnesium alloy billets were investigated. The results show that with the application of the low frequency electromagnetic field, the surface quality of Φ500mm ZK60 magnesium alloy billets has been markedly improved, and the depth of cold fold is decreased. In the conventional direct chill casting, the microstructures of the billet, especially at the center, are coarse. The distribution of the grain size is non-uniform throughout the billet. From the edge to the center, the microstructure gradually changes from fine to coarse in all billets. However, under the low frequency electromagnetic casting, the microstructures of the billet is significantly refined, the distribution of the grains size is relatively uniform from the billets edge to the billets center. And it also shows that the hot-tearing tendency of direct chill casting Φ500mm ZK60 magnesium alloy billets under low frequency electromagnetic field is significantly reduced.
magnesium alloy direct chill casting low frequency electromagnetic field refinement
Z. Q. Zhang Q. C. Le J. Z.Cui
Key Laborat ory of Electromagnetic Processing of Materials, Ministry of Education, NortheasternUnive Key Laborat ory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern Univ
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
26-29
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）