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Information × Registration Number 0222U000585, 0117U004153 , R & D reports Title The development of scientifically based technology solutions production and effective use of high-strength shaped sections in innovative building and transport constructions popup.stage_title Head Babachenko Oleksandr І., Доктор технічних наук Registration Date 13-01-2022 Organization Institute of Ferrous Metallurgy. ZI Nekrasov of the National Academy of Sciences of Ukraine popup.description2  In the work technologies for mass production of high-strength shaped rolled products with high enough complex of properties have been developed. In particular, the regularities of the formation of the structural state of thermomechanically strengthened structural steels have been experimentally studied. It has been shown that the formation of a specific ordered macrostructural inhomogeneity provides the possibility of obtaining shaped rolled products with strength 390-480 MPa with a satisfactory mechanical and operational properties. The possibility of forming symmetrical and asymmetric two- and three-layer inhomogeneous structures in terms of rolled thickness instead of traditional symmetrical five-layer structures has been shown firstly. The peculiarities of the formation of the structural state of steels with carbonitride hardening on the basis of the Al + Ti + N microalloying system have been studied. The possibility of production of high-strength shaped rolled products with strength 390-440 MPa with a satisfactory mechanical and operational properties in the hot-rolled steel has been shown. This level of properties in the hot-rolled steel is provided by the formation of a highly dispersed ferrite-perlite structure. Peculiarities of formation of acicular ferrite structure during decomposition of undercooled austenite in steels with carbonitride strengthening have been established. The possibility of obtaining high-strength shaped products with a yield strength of up to 550 MPa and a satisfactory mechanical and operational properties has been shown. The complex of properties is achieved due to the formation of the structure of acicular ferrite during the decomposition in the bainite region of undercooled austenite of steels microalloyed by Al + Ti + N system. The formed structure of acicular ferrite is characterized by a high degree of disorientation of bainitic laths, which allows to obtain high toughness and fatigue strength. Product Description popup.authors Babachenko Oleksandr І. Bahrova Yuliia St. Balakhanova Tetiana V. Budilova Yelizaveta B. Vakulchuk Volodymyr V. Holovko Liudmyla Dementieva Zhanna A. Dudchenko Serhii О. Duruakhurunva Chariti Domina Katerina G. Kimstach Tetiana V. Klemeshov Evgen S. Klynova Olha P. Kovzel' Maksim A. Kozachok Oleksandra Serhiivna Kononenko Ganna A. Kuzmychov Viacheslav M Kuksa Oleh V. Kutserei Oleksandr S. Maliienko Valentyna O Merkulov Oleksii Ye. Naumenko Lidiia D. Perkov Oleh M Petrov Oleksandr P. Podolskyi Rostyslav V. Puchykov Oleksandr V Rybalka Yevheniia М. Riaskova Nadiia S Savchenkov Oleksandr M. Safronov Oleksandr L. Safronova Olena А. Svyrydova Nataliia I Sydorenko Oleg Grygorovych Skachko Oleksandr S. Snihura Iryna R. Surovtseva Tetiana Ye. Sukhyi Andrii Р. Tkachenko Svitlana Mykhajlivna Tohobytska Daria M. Uzlov Oleg V. Filipov Andrii О. Filonenko Nataliia Yu. Hulin Artem M Shvetz Lyudmyla I. Shevchenko Valentyna М. Shpak Olena A. popup.nrat_date 2022-03-09 Close