Pengaruh Temperatur Cetakan, Bentuk Produk dan Inokulan Al-Ti-B Pada Proses Pengecoran sentrifugal Terhadap Sifat Fisis dan Mekanis pada Paduan Alumunium
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Abstract
Kata kunci: Vertical Centrifugal casting, Al-Ti-B, Mechanical properti, Rpm.
This study was carried out to produce aluminum alloy components in vertical centrifugal casting process 1000 rpm with 2 different temperatures mold in 3 variation compositions Al-Ti-B as an inoculation and investigating microstructures and mechanical properties of aluminum alloy by various testing. For this purpose specimen for testing such as; Hardness test, tensile test, Impact test were prepared by ASTM standard and tested in a testing machine. It was observed that the grain size of the microstructures of the cast products gradually smoothest from the inside to the outside of the product. This phenomenon is because a CF (Centrifugal Force), which push out all materials during filling period to the centrifugal mold. This explain why the cast product from this method are free from defect, the far side of the cast product was harder than the centre side. The mechanical properties of the cast products improved from less centrifugal force to bigger (outside). The mold temperature also influenced to the hardness of the cast product.
Keywords: Vertical Centrifugal casting, Al-Ti-B, Mechanical properties, Rpm.