Abstract:The friction coefficient, wear volume and wear scar morphology of the slipper pair composed of tool steel ball and 304 steel under different loads and speeds were investigated by using a friction and wear tester and a white light interferometer, so as to find the optimal working conditions to improve the service life and work efficiency of the slipper pair. Through range and variance analysis, it is found that the influence of load, speed and radius on the friction coefficient is significant, and the friction coefficient reaches the minimum when the load is 100 N, the speed is 50 r/min and the radius is 20 mm. Based on the optimal results of orthogonal test, the control variable test was carried out. The results show that the wear volume first increases and then decreases with the increase of load, and the minimum wear volume is 91.468×106 μm3 at 50 N; the wear volume increases gradually with the increase of rotating speed, and the minimum wear volume is 926.613×106 μm3 at 50 r/min; with the change of load and speed, the depth and width of the wear mark also change, the load has a significant effect on the width of the wear mark; when the load is from 50 N to 150 N, the width of the wear mark increases by 2.2 times and the depth increases by 1.9 times; the speed has a significant impact on the depth of the wear mark, and the width and depth of the wear mark increase by 34% and 1.66 times respectively when the speed is from 50 r/min to 150 r/min.