Perancangan dan Pembuatan Pulley Material Alluminium Alloy dengan Metode Vertical Centrifugal Casting

Abstract

This research was conducted to design and manufacture pulley prints used for vertical centrifugal laboratory-scale casting. The cor products are made of pulleys made of aluminum with variations of Si of 20%, 25%, and 30%. Tests carried out on materials include, among other things, strength tests, stiffness tests, and SEM tests. As for the purpose of this design, it is to know and understand the vertical centrifugal casting process and the material properties of the casting results. The result of the design and printing of this pulley has a height of 73 mm and a diameter of 356 mm. The result of the product specimen in the hardness test that has the highest hardness value is a mixture variation of Si 30% with a value of 78.43. In the wear test, the mixture variant of Si 20% has a higher wear value with a value of 3.41615x10-6. For the SEM test, the observation results using SEM showed that there is a low height difference of the surface, as can be seen from the dark and bright color of the morphological results of a surface. The darker the surface image of the specimen, the more it gets in the porosity hole.