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| HORIZONTAL CONTINUOUS CASTING OF Al-1wt%Si ALLOY CAST INGOTS UNDER ULTRASONIC FIELD |
| Xue－Peng GAO;;;;; |
| 大连理工大学材料科学与工程学院原材料特种制备重点实验室 |
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Cite this article:
Xue－Peng GAO. HORIZONTAL CONTINUOUS CASTING OF Al-1wt%Si ALLOY CAST INGOTS UNDER ULTRASONIC FIELD. Acta Metall Sin, 2007, 42(1): 17-22 .
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Abstract ABSTRACT In this paper, the effect of ultrasonic field during horizontal continuous casting of ?0mm Al-1wt%Si alloy bonding wire on the solidification has been investigated and the phenomenon has been theoretically interpreted. Experimental results showed that when the ultrasonic power of 1000W was imposed, the surface quality was improved, the surface roughness decreased from 40祄 to 10祄; the solidification structure was refined, the average grain size reduced from 94.1祄 to 31.2祄 and the mechanical properties were enhanced, not only the tensile strength and elongation increased by 20.5% and 37.5% respectively, but the hardness value increased by 23.9%. Meanwhile, the uniformity of the distribution of Si in ?(Al) was improved and the boundary segregation was suppressed, the fine globular microstructure of Si could be effectively obtained.
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Received: 14 April 2006
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