In the introduction of the diploma thesis, the description describes the process of wear and the specified types of wear depending on the function and construction and certain working conditions. Wear is a loss, that is, the removal of material from solid surfaces that touch each other during movement. Wear is understood as a gradual loss of material from the surface of machine parts and equipment that is undesirable, and takes place due to the dynamic action of another body, particles and/or fluid. The second chapter describes the basic mechanisms of wear. Depending on the causative agents, the following wear cases are distinguished: abrasion, adhesion, surface fatigue, freting (eating), erosion (liquid with or without hard particles), cavitational and tribocorrosion. In the third chapter, various cases of wear are described, and they are classified into the following types: sliding, rolling, impact, freting, abrasion, particle erosion, liquid erosion and cavitational erosion. The fourth chapter describes the process of boring, the formation and properties of the boride layer and the basic procedures of boring. Boring belongs to the procedures of thermochemical modification of the surface, which allows the chemical element boron to diffuse into the surface of the steel object. The boron process can be carried out with various boron-containing agents, which can be in three physical states: gaseous, liquid and solid. In the experimental part, which was carried out in the Materials Testing Laboratory located within the Faculty of Engineering in Slavonski Brod, steel C15 was boronized at a temperature of 870 ℃ for 4 and 8 hours. After that, the surface of the C15 steel was worn on the Taber Abraser device and the mass loss was measured after a certain number of revolutions. The obtained results were compared with the results of abrasive wear of the base material. The aim of the experimental part was to see if the surfaces that were beaten for 4 or 8 hours at 870 °C were consumed faster.