PADUAN VARIASI PUTARAN 0, 250, 550 RPM CENTRIFUGAL CASTING SIFAT FATIK PADUAN A 356 UNTUK VELG SEPEDA MOTOR

Abstract

The destination of this research was to determine the effect of rotational speed on the characteristics of fatigue in centrifugal casting alloy A356 aluminum alloy two-wheeled vehicle with a low round and 350 RPM and 550 RPM middle rounds. The casting in this research using a centrifugal casting method. The material used is a cast aluminum alloy A356. Variations rounds used in centrifugal casting is 350 and 550 RPM. Casting process carried out by pre-heating the mold 2500oC, 7500oC casting temperature and with the addition of titanium boron grain refiner 12:08%. Results foundry then made specimen for rotary bending fatigue test in accordance with JIS Z 2274 standard 1. The examination has been done is the rotary bending fatigue test. The examination results showed that the wheels with a round 0 RPM produces a voltage amplitude relationship with the number of cycles σa = 350 RPM rotation have a relationship with the voltage amplitude and at 550 RPM rotation have a relationship with the voltage amplitude.