TY - JOUR
T1 - Industrial Application of Ultrasonic Vibrations to Improve the Structure of Al-Si Hypereutectic Alloys
T2 - Potential and Limitations
AU - Komarov, Segrey
AU - Ishiwata, Yasuo
AU - Mikhailov, Ivan
N1 - Funding Information:
The authors gratefully acknowledge the financial support of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST «MISiS» (No. К3-2014-069).
Publisher Copyright:
© 2015, The Minerals, Metals & Materials Society and ASM International.
PY - 2015/7/26
Y1 - 2015/7/26
N2 - This work presents the results of research conducted by the authors over the past years in Nippon Light Metal Co., ltd. In the first stage, highly durable ceramic sonotrodes were designed and manufactured to introduce ultrasonic vibrations into molten metal in a launder or in a hot top during DC casting. It was shown that ultrasound can greatly refine the crystals of primary silicon in 75 to 178-mm billets, if vibration amplitude exceeds 40 μm (p–p). The structure uniformity was insufficient in launder treatment and fairly good in hot-top treatment. Care must be taken in controlling the passage of melt through the cavitation zone in order to fully exploit the refining potential of ultrasonic vibrations. The results suggest that if the treatment conditions are controlled properly, up to 20 kg/min of molten metal can be effectively treated using a 2-kW ultrasonic installation equipped with one ceramic sonotrode of 40 to 60 mm in diameter.
AB - This work presents the results of research conducted by the authors over the past years in Nippon Light Metal Co., ltd. In the first stage, highly durable ceramic sonotrodes were designed and manufactured to introduce ultrasonic vibrations into molten metal in a launder or in a hot top during DC casting. It was shown that ultrasound can greatly refine the crystals of primary silicon in 75 to 178-mm billets, if vibration amplitude exceeds 40 μm (p–p). The structure uniformity was insufficient in launder treatment and fairly good in hot-top treatment. Care must be taken in controlling the passage of melt through the cavitation zone in order to fully exploit the refining potential of ultrasonic vibrations. The results suggest that if the treatment conditions are controlled properly, up to 20 kg/min of molten metal can be effectively treated using a 2-kW ultrasonic installation equipped with one ceramic sonotrode of 40 to 60 mm in diameter.
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U2 - 10.1007/s11661-015-2829-0
DO - 10.1007/s11661-015-2829-0
M3 - Article
AN - SCOPUS:84929706423
SN - 1073-5623
VL - 46
SP - 2876
EP - 2883
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 7
M1 - 2829
ER -