APPLICATION OF METALLOPHYSICAL METHODS OF CERTIFICATION OF ROLLER DRIVE MATERIALS

The paper is devoted to the selection of methods for determining the materials used for the manufacture of roller drive in the framework of import substitution. Modern research methods were used such as optical and scanning electron microscopy, microhardness measurements using an automatic microhardness tester. As a result of measuring the microhardness of the roller drive material, the authors obtained an increase from 779HV in the center to 835HV on the teeth of the part. Based on metallographic studies, the microstructure of fine-needled martensite with well-defined chains of chromium, molybdenum, and vanadium carbides with a microhardness of 1200…1500 HV has been obtained. In case of microrentgenospectral analysis using a TESCAN LYRA 3 scanning electron microscope with the Ultim MAX microanalysis system, information was obtained on the point chemical composition of the sample material, traces of precipitation of carbides from a matrix with low visco-plastic properties were observed. Recommendations are given on suitable domestic analog materials. The research results can be used in constructive solutions for the design and modernization of machines and mechanisms.

roller, roller drive, linear actuator, microhardness, chemical composition, microstructure