Page 111 - 《摩擦学学报》2021年第6期

896 摩 擦 学 学 报 第 41 卷

0.465 20 12
d p =4.21F n +2.02 16 0.8
Friction coefficient, μ 0.460 12 Penetration depth, d p /μm Residual depth, d r /μm 8 4 0.6 Elastic recovery rate, f

0.455
μ=0.005F n +0.44
8 0.4
0.450 0 0.2
1 2 3 4 1 2 3 4
Normal load, F n /N Normal load, F n /N
(a) Friction coefficient, penetration depth vs normal load (b) Residual depth, elastic recovery vs normal load
0.40
0.12
μ p =0.017F n +0.052
0.38
μ a +μ v
0.10
μ p
0.36
0.08
μ a +μ v =−0.018F n +0.41 0.34

0.06
1 2 3 4
Normal load, F n /N
(c) Ploughing friction coefficient, the sum of adhesion and viscoelastic friction coefficient vs normal load

Fig. 6 Relationship between scratch parameters and normal load under the 15th scratch (υ=4 mm/min)
图 6 第15次划痕下，划痕参数与法向载荷的关系(υ=4 mm/min)

d r =−0.07υ+6.1 0.9
24 6
Friction coefficient, μ 22 Penetration depth, d p /μm Residual depth, d r /μm 4 f=−0.72υ 0.05 0.8 Elastic recovery rate, f
0.46

0.45
d p =−0.075υ+24.5 2
20 0.7
0 10 20 30 40 50 60 0 10 20 30 40 50 60
Scratch speed, υ/(mm/min) Scratch speed, υ/(mm/min)
(a) Friction coefficient, penetration depth vs scratch speed (b) Residual depth, elastic recovery rate vs scratch speed

0.135
0.33
μ p =−0.000 21υ+0.135
0.130
0.32 μ a +μ V
μ p

0.125
0.31

0.120
0 10 20 30 40 50 60
Scratch speed, υ/(mm/min)
(c) Ploughing friction coefficient, the sum of adhesion and viscoelastic friction coefficient

Fig. 7 Relationship between scratch parameters and scratch speed under the 15th scratch (F n =5 N)
图 7 第15次划痕下，划痕参数与划痕速度的关系(F n =5 N)