Ma Lei, Ding Siyuan, Zhang Chao, Zhang Meixian, Shi Hanbo
School of Mechanical Engineering, Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu 610039, China.
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China.
Materials (Basel). 2022 Dec 8;15(24):8763. doi: 10.3390/ma15248763.
The pin on the disc friction tester was used to conduct the intermittent braking testing of train brake materials with a low-temperature environment simulation device at temperatures 20 °C, 0 °C, -10 °C, -20 °C, and -30 °C. The results show that intermittent braking presents different wear characteristics of braking materials at low temperatures. Under different ambient temperature conditions, the most volatile friction coefficient caused by intermittent braking happens at 0 °C, and the wear rate of brake materials reaches its maximum at 0 °C. The wear surface morphology of the brake pad material mainly includes scratches, furrows, adhesions, and abscission pits, while the surface of the brake disc material was dominated by scratches, furrows, and adhesions. With the decrease in temperature, the adhesion damage of the brake pad/disc material increases. At 0 °C, the brake pad material has crack damage.
利用盘式摩擦试验机上的销子，通过低温环境模拟装置在20℃、0℃、-10℃、-20℃和-30℃的温度下对列车制动材料进行间歇制动试验。结果表明，间歇制动在低温下呈现出制动材料不同的磨损特性。在不同环境温度条件下，间歇制动引起的摩擦系数波动最大发生在0℃，制动材料的磨损率在0℃时达到最大值。制动片材料的磨损表面形貌主要包括划痕、犁沟、粘着和脱落坑，而制动盘材料表面则以划痕、犁沟和粘着为主。随着温度降低，制动片/盘材料的粘着损伤增加。在0℃时，制动片材料出现裂纹损伤。
