Pengaruh Temperatur Tempering terhadap Kekuatan Lelah Material Baja Thyssen-6582

Abstract

The purpose of this study is to examine the influence of the variation of tempering temperature on the fatigue strength of the steel material of Thyssen 6582. The tempering was first carried out for the fatigue test specimen by using a furnace at the temperatures of 100°C, 200°C, 300°C, 400°C, 500°C, and 600°C for 20 minutes. To obtain the fatigue strength, a test was carried out by using a fatigue test machine of Cantilever Rotating Bending with the speed of 850 revolution per minute (rpm). Mechanical tests such as tensile test, Rockwell C hardness test, and microstructure observation by using an optical microscope and Scanning Electron Microscope (SEM) were conducted to obtain supporting data in analyzing the fatigue strength of the material. The result of this study shows that the fatigue strength is very influenced by tempering temperature. At the tempering temperature of 300°C, the fatigue strength reaches up to 500 MPa and this is the highest fatigue strength of steel material of Thyssen 6582 compared to the fatigue strength tested under other tempering temperatures. Based on the S-N Curve, the tempering at the temperature of 300°C can increase the fatigue strength for 22% of the fatigue strength of material obtained without process of tempering, and will increase for 32% compared to the lowest fatigue strength obtained at the tempering temperature 100°C.