A Study on the Mechanical Properties and the Fatigue Life of the Braking Disc due to the Temperature Change

초록

This study investigates the mechanical properties and fatigue life of the braking disc (Cast iron GC25~30) for the railroad vehicle due to the temperature change test during the commercial operation. The temperature change was measured by non-contact Infra-red thermometers. Average temperature was measured between 92.60℃ and 104.46℃ and the maximum temperature is measured over 200℃ during the intercity line. In addition, we tested the thermal conductivity, tensile and J-integral at 100℃, 200℃, 300℃, that from the results of temperature change, and the fatigue life test was tested at the same temperatures.