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Highlights

The wear behavior between the metal and the nonmetal was discussed.

Abstract. A jujube branches crusher can effectively solve the difficult processing problem of the abandoned jujube branches, but the hammer claw, a key part in the crusher, often breaks due to wear. Studying the wear resistance of the hammer claw under different rotating speeds can improve the service life of the jujube branches crusher. The factors affecting the wear characteristics of the hammer claw were studied by means of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Wear tests and theoretical calculations showed that the friction coefficient between the hammer claw and the jujube branches tended to decrease as the speed increased, and the friction coefficient was the lowest at 45 m/min. There are two reasons for this phenomenon. The first reason is that the physical characteristics of jujube branches lead to a decrease in the friction coefficient. Second, with increasing speed, the friction coefficient of the contact surface will be further reduced by the lamellar-type debris of the jujube branches and spherical debris of the hammer claw. This work should be able to provide an experimental and theoretical basis for the selection of the rotation speed of a jujube branches crusher under actual working conditions.