QUALITY CONTROL OF HIGH-MANGANESE STEELS BY THE PARAMAGNETIC STATE OF AUSTENITE

Purpose. Determination of the methodology for the comprehensive evaluation of the mechanical properties of high-manganese steels according to one parameter that is sensitive to the influence of external factors, which will contribute to the reduction of laboratory research costs during the selection of the best samples (melts) of steel for the production of quality-critical products of responsible mechanical engineering. Research methods. Tearing tests were carried out on the УРМ-50 machine, the relative elongation was determined according to the standard method. Microhardness was measured using a ПMT3 device at a load of 50 g by a standard method. Determination of the specific paramagnetic susceptibility c0 of austenite (before mechanical tests) was carried out on automated magnetometric scales. Results. Based on the results of experimental studies, a correlation between mechanical properties and specific paramagnetic susceptibility c0 of austenite was established. The parameter c0 is a characteristic of the atomic-magnetic state of austenite and is a supersensitive value to the influence of various external factors. That is why it is proposed to use the specific paramagnetic susceptibility of austenite as an integral characteristic to determine the influence of various factors (chemical composition, smelting conditions, deformation, temperature, etc.) on the properties of steel. Scientific novelty. The idea of a relationship between the mechanical properties of austenitic steels and the previously formed atomic-magnetic state of the austenite matrix was proposed and experimentally confirmed. Practical value. The determined correlation between the mechanical properties of high-manganese steels and the specific paramagnetic susceptibility c0 of austenite and the proposed trend correspondence matrix make it possible to perform express forecasting and quality control of steels without conducting labor-intensive mechanical tests.