Evaluation of Horizontal and Vertical Constrained Rod Casting Mold on Hot Tearing Susceptibility of Al-Cu Alloys
Kardo Rajagukguk (Institut Teknologi Sumatera (ITERA), Universitas Gadjah Mada)
Suyitno Suyitno (Universitas Tidar (UNTIDAR), Universitas Gadjah Mada)
Harwin Saptoadi (Universitas Gadjah Mada)
Indraswari Kusumaningtyas (Universitas Gadjah Mada)
Budi Arifvianto (Universitas Gadjah Mada)
Urip Agus Salim (Universitas Gadjah Mada)
Muslim Mahardika (Universitas Gadjah Mada)
Eko Pujiyulianto (Universitas Gadjah Mada, Institut Teknologi Sumatera (ITERA))
Laurens Katgerman (Katgerman Aluminium Technology, TU Delft - Team Joris Dik)
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Abstract
This research aims to evaluate horizontal and vertical constrained rod casting (CRC) molds on hot tearing susceptibility (HTS) of Al-xCu casting alloys with 2.2, 3.6, 7.5, and 12.5 percent Cu. The hot tears on the casting product were observed using a macroscopic approach. In addition, the hot tearing susceptibility of each casting product prepared using these molds was evaluated using the HTS formula. The results show that the vertical CRC mold has a higher HTS value than the horizontal CRC mold. The rod length is a significant factor in causing hot tearing. Longer rods are more susceptible to hot tearing. The horizontal CRC mold provides a clearer effect of rod length and Cu composition on the average HTS value. In the vertical CRC mold, the effect of Cu composition on the average HTS value is less clear. Therefore, it is highly recommended to use horizontal CRC mold for HTS testing of aluminum casting alloys.