Study on Tribological Properties of Friction Pair of HFC Hydraulic Components
In order to explore the tribological properties of hydraulic components under HFC water-glycol hydraulic fluids,the MFT-5000 friction and wear testing machine was used to investigate the friction and wear changes of three hydraulic components com-monly used materials(304 steel ball,ZrO2 and Si3 N4)&304 stainless steel pairs under different loads and sliding frequencies.The wear marks of 304 steel were analyzed by white-light 3D interferometer.The results show that under the lubrication of water-glycol hy-draulic fluids,the sliding frequency has more influence on the friction coefficient than the load,and the load has more influence on the wear volume than the sliding frequency.When the load is 50 N and the sliding frequency is 3 Hz,the friction coefficient and wear vol-ume of ZrO2 and 304 steel pairs are the smallest,and the wear mechanism is mainly three-body abrasive wear.Considering comprehen-sively,the friction coefficient and wear volume of ZrO2/304 steel pair are more stable under different loads and sliding frequencies,and it is more suitable as a friction pair material for HFC hydraulic components.
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