Page 39 - 摩擦学学报2025年第8期

第 8 期 刘雄强, 等: 多次制动工况下列车制动闸片摩擦块磨损行为的演变规律分析 1137

Contact pressure/MPa Contact pressure/MPa Contact pressure/MPa Contact pressure/MPa
(a) 9.35 2.25 1.83 1.90

0.00 0.61 1.10 1.14
Time
Contact pressure/MPa Contact pressure/MPa Contact pressure/MPa Contact pressure/MPa
4.23 1.88 2.07 1.95

0.00 1.16 0.93 1.37

Depth/μm Depth/μm Depth/μm Depth/μm
(b) 9.20 6.45 6.70 7.36

1.86 4.37 6.01 7.04
Time
Depth/μm Depth/μm Depth/μm Depth/μm
6.17 6.49 7.01 7.71

3.55 5.31 6.57 7.47
Fig. 15 Evolution of wear behavior during the second braking process: (a) pressure distribution; (b) main wear areas
图 15 第2次制动过程中磨损行为的演变：(a)压力分布；(b)主要磨损区域

Depth/μm Depth/μm Depth/μm 16.9 Wear depth/μm 275.6
(a) 23.2 56.1 49.7
(b)

16.9 38.7 49.6
Running-in First braking Second braking After running-in After the first After the second
braking braking
Depth/μm Depth/μm Depth/μm
49.7 49.7 49.7

49.6 49.6 49.6
Third braking Fourth braking Fifth braking After the third After the fourth After the fifth
braking braking braking
Fig. 16 Evolution of wear behavior of the friction block under multiple braking conditions: (a) main wear areas during
each braking process; (b) accumulated wear depth
图 16 多次制动工况下摩擦块的磨损行为演变：(a)每一次制动过程中的主要磨损区域；(b)累积磨损深度

c. 跑合过程中摩擦块切入端磨损严重，第1次制 增加而不断增加.

动中摩擦块中部磨损严重，在后续制动过程中，虽然 d. 摩擦块表面的压力分布由初始磨损状态、热膨
主要磨损区域随时间发生变化，但摩擦块整体磨损较 胀行为和磨损行为共同决定. 初始磨损状态决定了制
为均匀. 同时，摩擦块的总磨损深度随着制动次数的 动开始时摩擦块的压力分布，热膨胀引起摩擦块表面