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Metal Science and Metallography
ArticleName Influence of heat treatment on forming the complex of properties for high-strength cold-resistance steel
DOI 10.17580/cisisr.2023.01.12
ArticleAuthor P. P. Poletskov, N. V. Koptseva, Yu. Yu. Efimova, A. S. Kuznetsova
ArticleAuthorData

Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia):

P. P. Poletskov, Dr. Eng., Prof., Dept. of Metal Processing Technology
N. V. Koptseva, Dr. Eng., Prof., Dept. of Casting Processes and Materials Science
Yu. Yu. Efimova, Cand. Eng., Associete Prof., Dept. of Metal Processing Technology
A. S. Kuznetsova, Cand. Eng., Senior Researcher, Dept. of Metal Processing Technology, e-mail: allakuznetsova.mgtu@mail.ru

Abstract

Creation of materials for application in the extremal operating conditions, including Arctic and Far North regions, is connected with solving of several problems caused by the effect of static, cyclic and dynamic loads, intensive wear, extra low temperatures etc. A group of scientists from Nosov Magnitogorsk State Technical University has developed the unique combinations of requirements for production of new steels, which are characterized by simultaneous high strength and ductility as well as wear resistance, atmospheric resistance and cold resistance at the temperature down to minus 70 °С. Such properties determine possibility of multirole application of these steels in constructions and objects of Russian oil and gas industry as well as in the areas of bridge construction, building, transport and heavy machine-building and other industries. Production of such steels with different alloying systems, i.e. Si-Mn-Мo and Si-Mn-Ni-Mo with microalloying is mastering at Magnitogorsk Iron and Steel Works in cooperation with Nosov Magnitogorsk State Technical University, within the framework of solving the problem of foreign import replacement. In this case the range of requirements for different concrete grades of multi-functional materials is varied within rather wide range: σв – from 580 to 1500 MPa, σ0,2 – from 500 to 1100 MPa, 95 – from 10 to 20 %, KСV-70 – from 25 to 100 J/cm2. Influence of heat treatment procedures (quenching with consequent tempering) on forming the complex of mechanical properties and low-temperature impact strength for highstrength low carbon steels with Si-Mn-Мo and Si-Mn-Ni-Mo alloying systems is examined in this research.

The work has been performed with financial support of the Ministry of Education of Russia within a complex project for creation of high-technology production implemented with participation of an institution of higher education (Agreement No. 075-11-2021-063 of 25.06.2021).

keywords Low carbon high-strength steels, Si-Mn-Мo and Si-Mn-Ni-Mo alloying systems, quenching, tempering, structure, mechanical properties, low-temperature impact strength
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