Pengaruh Temperatur pada Proses Hot Isostatic Pressing terhadap Porositas, Keausan dan Mikrostruktur Sludge Powder Duralumin
Sludge is the starting raw material in the process of forming wheels with forging method. Performance wheels strongly influenced by the quality of sludge. Sludge should have physical properties that light , soft and easy strengthened. One material that can be used as materials for sludge are: duralumin material. Duralumin is another name for aluminum & copper alloy (Al / Cu) with a Cu content of about 4 %. Making sludge powder duralumin with powder metallurgical methods can improve the quality of sludge.Making the specimen begins to weigh 100 g of powder duralumin and enter into a mold that has been in the preheating (100 Â° C). Wait about 10-15 minutes until the mold temperature reached (450 Â° C), (475 Â° C) , (500 Â° C) , and (525 Â° C). Perform (hot iso- static pressing) HIPing by using a hydraulic press machine at 50 MPa and kept constant for 30 minutes. After the specimens were removed from the mold. The results showed the higher temperature tends to result in a percentage sitering porosity and wear rate decreases. This is evidenced by the percentage of porosity at a temperature of 450 Â° C , 475 Â° C , 500 Â° C , and 525 Â° C is 1.193 Â° C , 1:03 Â° C , 0757 Â° C and 0733 Â° C. While the wear rate at the sintering temperature of 450 Â° C , 475 Â° C , 500 Â° C , and 525 Â° C is 0.00095 g / s , 0.00080 g / s , 0.00059 g / s , 0.00050 g / s. Then from the microstructural observations with 500x magnification SEM image shown that with increasing temperature HIPing likely to result looks smooth surface of the test specimen.
Keywords: Powder Metallurgy, Temperature HIPing, Duralumin, Sludge, Porosity, Wear, Microstructure.
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