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张俊凯,厉英.永磁场对金合金二次枝晶臂间距和析出相的影响[J].稀有金属材料与工程(英文),2018,47(9):2857~2860.[zhangjunkai and liying.Effects of Permanent Magnetic Field on Secondary Dendrite Arm Spacing and Precipitate of Gold Alloy[J].Rare Metal Materials and Engineering,2018,47(9):2857~2860.]
Effects of Permanent Magnetic Field on Secondary Dendrite Arm Spacing and Precipitate of Gold Alloy
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Received:November 13, 2016  Revised:January 05, 2017
DOI:
Key words: permanent magnetic field  precipitate  gold alloy  secondary dendrite arm spacing
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
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zhangjunkai and liying  
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Abstract:
      In this work, the permanent magnetic field was applied to prepare gold alloy and the influences of permanent magnetic field on secondary dendrite arm spacing and precipitate of gold alloy was also discussed. The results show that the rotating magnetic field remarkably refined the microstructure and reduced secondary dendrite arm space of gold alloy. However, a too high rotating speed can increase the skin effect of the molten metal and lower the magnetic flux density of the centre, thereby increasing secondary dendrite arm space. The area fractions of α2 can be increased by rotating magnetic field. At 300r/min, the gold alloy had the highest area fractions of α2, which was 59.4% higher than without permanent magnetic field.