A Study of the Change of Temperature on Brake Disk Surface during the Service and The Fatigue Characteristic of disk material due to Temperature

철도차량 운행중 제동디스크의 표면 온도변화 및 디스크 재료의 온도변화에 따른 피로특성 연구

This study investigates the change of the temperature and fatigue property of the braking disk (GC25-30 material) for the railway vehicle. The average temperature is measured about $100^{\circ}C$ and the maximum temperature is measured over $200^{\circ}C$ by non-contact sensor from Seoul to Chun-an. In the $20^{\circ}C-300^{\circ}C$. The Fatigue tests did for new and used disk specimens. The fatigue test results of new disk specimens were similar due to the temperature change. But the compare of specimens between new disk and old disk, The fatigue life of old disk specimens was smaller than new disk specimens about 10%.