IMPROVING FATIGUE CHARACTERISTICS OF STRUCTURAL AND TOOL STEELS BY SURFACE HARDENING

UDC 674.023

  • Pishchov Mikhail Nikolayevich − PhD (Engineering), Assistant Professor, the Department of Material Science and Engineering of Technical Systems. Belarusian State Technological Uiversity (13a, Sverdlova str, 220006, Minsk, Republic of Belarus). E-mail: Pishchou@belstu.by

  • Belsky Sergey Yevgrafovich − PhD (Engineering), Assistant Professor, the Department of Material Science and Engineering of Technical Systems. Belarusian State Technological Uiversity (13a, Sverdlova str, 220006, Minsk, Republic of Belarus). E-mail: dmiptu@belstu.by

  • Adel Abdel Wasset Rashid − Beirut Arab University, Lebanon, Tyre. E-mail: adel_rasheed_1975@hotmail.com

  • Vergeichik Aleksey Viktorovich − student, Faculty of Technology of Organic Substances. Belarusian State Technological University (13a, Sverdlova str, 220006, Republic of Belarus). E-mail: myshavolodarsky1@gmail.com

DOI: https://doi.org/10.52065/2519-402X-2021-246-40-313–319

Key words: steel, surface hardening, fatigue characteristics, temperature, time.

For citstion: Pishchov M. N., Belsky S. Ye., Adel Abdel Wasset Rashid, Vergeichik A. V. Improving fatigue characteristics of structural and tool steels by surface hardening. Proceedings of BSTU, issue 1, Forestry. Nature Management. Processing of Renewable Resources, 2021, no. 2 (246), pp. 313– 319 (In Russian).DOI: https://doi.org/10.52065/2519-402X-2021-246-40-313–319.

Abstract

The operational properties and durability of parts of movable conjunctions are largely determined by the condition of their working surfaces that are subject to contact loads. In addition, the main sources of stress concentration are occur on the surface. The stress depends on the shape of the part, roughness, the nature of the joints and friction forces in the mating parts.

In many cases, tensile stresses occurs in the surface layer when the parts are loaded. It leads to a leads to a decrease in the fatigue characteristics of materials. Therefore, to increase the resistance to fatigue failure of parts working under cyclic loading conditions it is promising to use surface hardening.

This article deals with the influence of complex borating on the fatigue characteristics of structural steel. The possibility of a significant increase in the endurance limits of samples made of 20KHN3A steel is shown, the rational composition of the saturating mixture, as well as the temperature and time parameters of the process are determined. The possibility of a significant increase in the fatigue characteristics of tool steel 5KH3VZMFS by cementation which is necessary for the manufacture of die steel is also specified.

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References

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22.03.2021