Effect of Brake Parameters on Friction Properties of Brake Materials in Low Temperature Environment

doi:10.3901/JME.2021.08.230

Abstract

Abstract: Using a pin-on-disc testing rig and a temperature-controlled chamber to simulate the braking behavior of train in low temperature environment. The influences of braking pressure and speed on the friction and wear performances of the brake disc and brake pad in low temperature environment (-20 ℃) are studied. The results show that the friction coefficient and wear rate of the brake disc and the brake pad at low temperature (-20 ℃) are slightly higher than those at the room temperature (20 ℃). In low temperature environment, braking pressure and braking speed have obvious influences on friction, wear and damage behaviors of brake materials. With the increase in brake pressure, the friction coefficient between the brake disc and the brake pad decreased firstly and then tended to be stable. With the increase in brake speed, the friction coefficient decreased firstly and then increased. With the increase in brake pressure, the wear rate of brake disc and brake pad increased firstly and then tended to be stable, and the wear rate of brake pad material was greater than that of brake disc material. With the increase in brake speed, the wear rate of brake disc decreased rapidly, while the wear rate of brake pad decreased firstly and then tended to be stable. With the increase in braking pressure and braking speed, the third body layer on the worn surface of the brake pad was more evenly distributed, and the number and area of peeling pits on the surface showed a decreasing trends.

Key words: low temperature environment, brake parameters, brake disc material, brake pad material, friction and wear

CLC Number:

TH117

ZHANG Chao, MA Lei, DING Haohao, GUO Lichang, WANG Wenjian, GUO Jun, LIU Qiyue. Effect of Brake Parameters on Friction Properties of Brake Materials in Low Temperature Environment[J]. Journal of Mechanical Engineering, 2021, 57(8): 230-239.

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