Page 124 - 《摩擦学学报》2021年第6期

第 6 期 刘旭东, 等: 原始组织对ER9车轮钢滚动接触疲劳性能的影响 909

(a1) (b1)

Fine-grained region
2 μm 2 μm
(a1) Original P+PF sample (b1) Original TS sample

(a2) (b2)

Fine-grained region

Fine-grained region
2 μm 2 μm

5
5
(a2) Pre-wear 1×10 cycles of P+PF sample (b2) Pre-wear 1×10 cycles of TS sample
(a3) (b3)

2 μm

2 μm 2 μm 2 μm

(a3) Fatigue test operate 1×10 cycles of P+PF sample (b3) Fatigue test operate 1×10 cycles of TS sample
5
5
(a4) (b4)

2 μm 2 μm

5
5
(a4) Fatigue test operate 3×10 cycles of P+PF sample (b4) Fatigue test operate 3×10 cycles of TS sample

Fig. 9 Surface microstructure of the two samples after working for different cycles
图 9 两种试样运行不同周次的表面组织