Investigation of the process of abrasive wear of materials working bodies ripping equipment

The problem of ensuring the reliability and longevity of the working bodies of the ripping equipment is considered. These properties are largely determined by the amount of abrasive wear of the materials of which the machines and their working bodies are made. In the process of the power action of the abrasive particle, two stages are distinguished on the surface of the working body during abrasive wear. The first of them is characterized by the introduction of an abrasive particle into the metal of the surface layer of the working body. To ensure the introduction of the surface hardness of the abrasive particle should be higher than the hardness of the metal wear surface. At the second stage, the particle, having penetrated into the material at a certain depth, makes a translational motion along its surface. At the same time, the abrasive particle performs a complex polydeformation destruction of the material of the working body. The article analyzes the factors influencing the abrasive wear of the materials of the working bodies. The expediency of taking into account the physicomechanical and morphological properties of abrasive particles in evaluating the type of their frictional interaction with the materials of the working bodies of the ripping equipment is substantiated. The results of investigation of the hardness of abrasive quartz particles of the Irtysh region are considered. The results of the investigation of the process of interaction of abrasive sand particles with the material of the working body are presented, which allow to determine the amount of force of introduction of particles into the material during its wear. The value of the depth of introduction of an abrasive particle into the material of the working body from the action of the normal component of the penetration force is determined. This allowed us to justify the limiting values of the criterion for the transition of one type of frictional interaction to the other and establish the boundaries of the zones of friction interaction along the length of the working body.