Poppy Puspitasari, Deby Yangin Drajat, Dewi Puspitasari, Za'im Zarkasi, Muhammad Ilman Nur Sasongko, Rudi Anggoro Kurniawan, Putut Murdanto, Tuwoso
Sand casting carried by medium and large scale industries typically uses commercial silica sand. Natural disaster on Mount Kelud eruption has introduced a new breakthrough in the form of ideas to use volcanic sand foundry sand as a base material for aluminum silica based products. This study, meanwhile, used the experimental method in which, prior to be given the treatment, the specimens were analyzed on the strength of molding sand, disability and ability to cast the metal flow (fluidity), and the quality of Al-Si as casting product. In addition, to observe the defects, tests on surface hardness and microstructure of Al-Si using Optical Microscope and Scanning Electron Microscope (SEM) were conducted. The results showed the best fluidity owned by the eruption of Mount Kelud sand specimens with a variety of bentonite 10% and hardness value at 129.71 HV. The data obtained from the microstructure result revealed that the eruption of Mount Kelud sand specimens with 10% portland cement variations have the pinhole defect size of most small amounting to ± 7 pieces and open grain structure defects ± 117 pieces. In other words, sand Kelud eruption molding sand can be an alternative to the metal casting industry. © 2006-2016 Asian Research Publishing Network (ARPN).
Mechanical Engineering Department, Engineering Faculty, Universitas Negeri Malang, Semarang Malang, East Java, Indonesia
