Abstract: The temperature characteristics of the developed friction material showed in the parking brake test by friction & wear tester for railway rolling stocks are studied, and the analyses are given from the point of view of energy conversion, heat transmission and change of material nature. The results showed that all of the temperature characteristic curves under different initial braking speed can be divided into three tages, that is irresponsive stage, rapid temperature rise stage and slow temperature change stage, and the curve of 180 km?h–1 showed abnormal change. The reason of abnormity of the third stage is that the rate of energy conversion during parking brake slowed down and at the same time the effect of heat dissipation enhanced relatively when the braking close to finished. The abnormity of the temperature characteristic curve at 180 km?h–1 is attributed to the formation of friction film on the surface of brake pads.

Key words: Brake Temperature Friction