25CrNi2MoV钢的微动磨损性能

采用微动摩擦磨损试验机在干摩擦条件下对新型高速重载传动轴用25CrNi2MoV钢进行微动磨损试验,研究了不同载荷(50~200N)和频率(15~30Hz)下该钢的微动磨损性能。结果表明:在频率为20Hz条件下,当载荷由50N增至200N时,25CrNi2MoV钢的平均摩擦因数由0.766减至0.661,磨损体积由19.65×10^-3 mm^3增至75.83×10^-3 mm^3;在载荷为30N条件下,当频率由15Hz增至30Hz时,平均摩擦因数由0.790增至0.905,磨损体积由11.43×10^-3 mm^3增至23.88×10^-3 mm^3;在不同试验参数下,25CrNi2MoV钢磨损表面均出现了氧化和犁沟现象,磨损机制包含氧化磨损和磨粒磨损;在频率为20Hz条件下,载荷为50,100N时,25CrNi2MoV钢的磨损机制以黏着磨损为主,载荷为150,200N时,主要磨损机制为疲劳磨损;在载荷为30N条件下,频率为15~25Hz时,磨损机制以磨粒磨损为主,当频率增至30Hz时,磨损机制以疲劳磨损为主。

Fretting Wear Property of 25CrNi2MoV Steel

The fretting wear test of new type 25CrNi2MoV steel for high-speed and heavy-duty drive shaft was carried out by fretting friction and wear tester under dry friction condition.The fretting wear property of the steel under different loads(50-200 N)and frequencies(15-30 Hz)was studied.The results show that the average friction coefficient of 25CrNi2MoV steel decreased from 0.766 to 0.661,and the wear volume increased from19.65×10^-3 mm^3 to 75.83×10^-3 mm^3 when the load increased from 50 N to 200 N at the frequency of 20 Hz.Under the load of 30 N,when the frequency increased from 15 Hz to 30 Hz,the average friction coefficient increased from 0.790 to 0.905,and the wear volume increased from 11.43×10^-3 mm^3 to 23.88×10^-3 mm^3.Under different test parameters,the oxidation and ploughing appeared on the wear surface of 25CrNi2MoV steel,indicating that the wear mechanism contained oxidation wear and abrasive wear.The wear mechanism of 25CrNi2MoV steel was mainly adhesive wear under the load of 50,100 N,and was fatigue wear under the load of 150,200 Nat the frequency of 20 Hz.Under the load of 30 N,the wear mechanism was mainly abrasive wear at the frequency of 15,25 Hz,and was mainly fatigue wear at the frequency of 30 Hz.