PENGARUH TEMPERATUR CETAKAN TERHADAP KEKUATAN IMPAK DAN STRUKTUR MIKRO HASIL PENGECORAN ALUMINIUM SKRAP
Abstrak
This study aims to analyze the effect of mold temperature variations on metal molds on impact strength and microstructure with aluminum raw materials from used motorcycle wheels. In this study using 3 variations of mold temperature namely: 150 °C, 200 °C and 300 °C. Testing of impact test specimens refers to ASTM E23 standards, with Charpy method testing. Microstructure observations were made with microphotographs using an optical microscope and comparing the results of each mold temperature variation. The higher the mold preheating temperature will increase the impact strength. This is evident in the impact strength at mold temperature 150 ˚C of 122500 J/m², at mold temperature 200 ˚C of 127400 J/m², and the highest impact strength at mold temperature 300 ˚C of 142100 J/m². In addition, the increasing mold temperature will increase the grain size of the specimen, so that the specimen properties are also more ductile. It can be concluded that mold temperature affects the microstructure and mechanical properties of aluminum.
Referensi
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