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Information × Registration Number 0222U004455, 0121U113418 , R & D reports Title Increasing of the complex mechanical properties of iron-carbon alloys by optimizing the chemical composition, traditional and promising methods of thermal hardening popup.stage_title Head Cheiliakh Oleksandr P., д.т.н. Registration Date 08-08-2022 Organization State Higher Educational Institution "Azov State Technical University" popup.description2  The object of research is the properties of semi- and finished products made of structural steels and white cast iron, which were subjected to modern methods of heat hardening. The purpose of the work is to improve the quality and properties of metal products due to alloying, modern options for thermal strengthening. Research methods – metallographic analysis, measurement of microhardness, testing of standard mechanical properties, testing for wear resistance, dynamic crack resistance, mathematical modeling of critical points, phase composition using the JMatPro computer program. The creation of a fine-grained multiphase dispersed structure with metastable austenite by heat treatments, which include heating and regulated aging in intercritical temperature interval (ITI), allows to obtain properties in steels 60Si2Mn and 60Si2MnCrV that make it possible to use them for various operating conditions, and not only as a spring-spring material. It was experimentally established that plasma modification of white cast iron of the 300Cr25Ni3Si3 grade leads to a simultaneous increase in hardness and wear resistance (by ~2 times) and crack resistance (by ~1.5 times), which is due to the formation of a surface modified layer with a highly dispersed structure. The effect of different heat treatment options (isothermal treatment with ITI, Q&P treatment with MKI or single-phase austenite region) on the microstructure and mechanical properties of low-alloy TRIP-assisted steel was established. It was established that heat treatment according to the ITI/Q&P scheme is optimal and provides 20Si2Mn2Nb steel with high strength during cold plastic deformation. The level of strength of cold-rolled steel HC260LA is determined by the additivity of various impact mechanisms. Alloying with titanium in the amount of 0.015-0.030% and coiling of the roll at 620 °C with subsequent accelerated cooling leads to an increase in strength by ~30 MPa. Product Description popup.authors Efremenko Vasily Georgievich Gavrylova Viktoriya Grygorivna Malinov Leonid S Malysheva Inna Yu Ryabikina Marina A Samotugina Uliya S popup.nrat_date 2022-08-08 Close