A Novel Ultrasonic Casting Process Using Controlled Cavitation and Melt Flow in Hot Top Molds

Abstract:

The present work introduces a novel ultrasonic DC casting process which allows producing billets of hypereutectic Al-Si alloys with greatly refined and uniformly distributed particles of primary Si. In the process, ultrasonic vibrations are introduced into an Al-17Si-0.01~0.03P melt in a hot top positioned on the mold by using a high-amplitude ceramic sonotrode. The hot top design and sonotrode arrangement provided a highly effective cavitation treatment of the melt in the hot top and well-controlled flow in the sump. A simplified model is proposed to explain the obtained results.

• Periodical: Materials Science Forum (Volumes 794-796)
• Pages: 124-129
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.794-796.124
• Online since: June 2014
• Authors: Sergey Komarov*, Yasuo Ishiwata, Yoshihiro Takeda
• Keywords: Al-Si Alloy, DC Process, Primary Silicon, Structure Refinement, Structure Uniformity, Ultrasonic Casting

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