Failure Causes and the Improvement Countermeasures on High-speed Brake Disc

doi:10.3901/JME.2023.14.264

Abstract

Abstract: Disc brake is an important way of high-speed railway braking. As an important part of disc brake, the brake disc has many failure forms, such as wear, hot spot, hot crack and so on. The three failure forms and causes of brake disc were summarized. The improvement of brake disc from three aspects of structure improvement, material improvement and surface modification are reviewed. The combination of ventilated brake disc and floating brake pad can enhance heat dissipation, and the high thermal conductivity material can be used for preparation. At the same time, the defects in the manufacturing process should be reduced, therefore the thermal shock resistance and wear resistance of the brake disc can be improved. In addition, two directions of improving the comprehensive performance of the brake disc and stabilizing the braking system through surface modification are reviewed, namely, the surface strengthening layer is prepared by laser cladding and thermal spraying. Evaluating coatings by friction experiments is prospected, in order to promote the development of technical means and test methods for surface modification of brake discs.

Key words: braking system, brake disk, failure causes

CLC Number:

TG156

WEN Yuying, ZHANG Xiaoxin, YAN Qingzhi. Failure Causes and the Improvement Countermeasures on High-speed Brake Disc[J]. Journal of Mechanical Engineering, 2023, 59(14): 264-276.

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