A review of various approaches used to model the contact interaction between the grinding wheel grain and the surface layer of the workpiece during grinding is presented. In addition, the influence of material properties, grinding parameters and grain morphology on the contact process is studied.

Keywords: grinding, grain, contact zone, modeling, grinding wheel, indenter, micro cutting, cutting depth

The effect of the feed on the tooth on the durability of a carbide tool when cutting corrosion-resistant austenitic steel 08H18N10T on a milling machine is being experimentally investigated. The main attention is paid to the analysis of the mechanisms of tool wear, chip formation and the phenomenon of riveting in various cutting modes. It is shown that a paradoxical decrease in feed from 0.07 mm/tooth to 0.06 mm/tooth increases adhesive wear and worsens chip removal, which leads to a decrease in tool durability by 5.7% and a decrease in the number of cuts by 16-23%. The test results confirm that the optimal feed rate is 0.07 mm/tooth ensures a stable process with abrasive wear and curled chips, increasing tool life.

Keywords: cutting, austenitic steel 08H18N10T, carbide tool, tool durability, tooth feed, adhesive wear, chip formation, riveting, optimization of cutting modes

The article discusses the main methods of carbon black granulation, and compares the results with an existing industrial installation. The granulation process is necessary to convert powdered carbon black into homogeneous granules in order to simplify its further transportation and use. Despite the wide variety of granulation methods, there are problems with the uniformity of granules, equipment wear, and the formation of stagnant zones. As a result of the experiments conducted on the laboratory granulator described in the article, photos of the results are provided. Each of the methods used has a description of stagnation zones, which allows us to conclude that the most efficient method is to convert powdered carbon black into granules.

Keywords: pelletizing, wear, granulator, rotor fingers, experiment, technique, carbon black

The oil and gas engineering industry is undergoing changes that are associated with the introduction of innovative technologies, methods and tools to improve production processes and systems. All changes make it possible to achieve an increase in the average resource, durability and profit of the enterprise as a whole. Processing parts of the oil and gas complex and reducing all types of wear on the cutting part of the tool currently remains the most pressing topic. The continuous operation of a cutting tool is influenced by many factors. The relationship between cutting speed and tool life allows you to select the optimal speed. The work identifies the main directions of research on the selection of wear-resistant coatings for cutters to improve the accuracy of metalworking. The research was carried out using modern computer programs, which made it possible to draw certain conclusions, derive dependencies and determine the range of tasks for further research. Application of the main results will improve the processing efficiency and surface quality of parts in the oil and gas sector.

Keywords: durability, cutting mode, cutter, optimization, experiment, methodology, accuracy, processing, coatings, deformation

Studies have been carried out to determine the microhardness of the base metal, the microhardness at the fusion boundary and the deposited coating. The influencing factors of the value of the height of the protective coating of the sample on the value of microhardness are considered. Graphs of the distribution of microhardness in the base metal and the protective coating of samples by gas-powder surfacing are presented.

Keywords: microhardness, protective coatings, gas-powder surfacing, fusion boundaries