Журналы →  Chernye Metally →  2020 →  №4 →  Назад

Heating and Heat Treatment
Название The effectiveness of hardening thermally improved steels in aqueous polymer solutions
Автор V. I. Astashchenko, T. V. Shveyova, A. I. Shveyov
Информация об авторе

Kazanskiy (Privolzhskiy) Federal University (Kazan, Russia):

V. I. Astashchenko, Dr. Eng., Prof., Dept. of Materials, Technologies and Quality, E-mail: astvi-52@mail.ru
T. V. Shveyova, Cand. Eng., Associate Prof., E-mail: asttv@mail.ru
A. I. Shveyov, Associate Prof., E-mail: Shveev_Andrey222@mail.ru


Results of study of hardening capacity and hardenability of steel products of 40H, 42HМFА, 47GТ and steel 45 after quenching in water, oil and aqueous solutions with different content of polymer are presented. High capacity for hardening of medium-carbon alloyed steels and absence of cracks on parts of complex shape at quenching in 32.5% solution of polyalkylene glycol were revealed. The properties of structural steels after thermal improvement, which were cooled in various media during quenching, have been investigated. Advantages of application for quenching of aqueous solutions of polymers are shown. In comparison with oil, quenching in synthetic media provides higher hardness and reduces the content of non-artensitic conversion products in hardened steel. Infl uence of bainite obtained during quenching on toughness, threshold of cold brittleness and endurance of steels after thermal improvement is revealed. A color etching method was used to distinguish structural constituents in hardened steel. Fractograms of the fracture surface of standard samples tested for impact bending at different temperatures are presented. Hereditary connection is established between initial structure of hardened steel with quality indices of surface hardened layer obtained during quenching with heating by high-frequency currents. Quenching in aqueous solutions of polyalkylene glycol allows to realize at maximum level resistance of high-yield steel to brittle destruction and its fatigue strength, as well as quenching throughout the section of metal production.

Ключевые слова Quenching medium, steel, hardenability, hardness, strength, toughness, structure, heat treatment, cold-fracture threshold
Библиографический список

1. Goryushin V. V, Shevchenko S. Yu. On the use of polymer hardened media in industry. Metallovedenie i termicheskaya obrabotka metallov. 2010. No. 6. pp. 26–30.

2. Ryabov D. А., Khlybov А. А., Minkov К. А. On the prospect of using a water-air mixture for cooling hammer dies. Trudy NGTU imeni R. Е. Alekseeva. 2018. No. 1. pp. 196–203.
3. Maisuradze М. V., Ryzhkov М. А., Yudin Yu. V. Rapid assessment of the cooling ability of quenching media. Metallovedenie i termicheskaya obrabotka metallov. 2015. No. 8. pp. 66–70.
4. Shevchenko S. Yu., Smirnov А. Е., Kirillov I. V., Kurpyakova N. А. Study of quenching cooling in gaseous media. Metallovedenie i termicheskaya obrabotka metallov. 2016. No. 8. pp. 15–19.
5. Shorokhova О. V., Oskolkova Т. N. Thermovit-M new water-polymer quenching medium. Izvestiya vysshikh uchebnykh zavedeniy. Chernaya metallurgiya. 2011. No. 4. pp. 28–30.
6. Abramova А. N., Svyatkin А. V., Merson D. L., Shabanova Е. Yu. The study of the universality of the use of polymer quenching media for a range of OJSC AvtoVAZ steels. Vektor Tolyattinskogo gosudarstvennogo universiteta. 2013. No. 1. pp. 85–90.
7. Shveyova Т. V., Pesin А. М., Pustovoytov D. О. The sensitivity of steels to crack formation during hardening in polymer solutions. Zagotovitelnye proizvodstva v mashinostroenii. 2019. Vol. 17. No. 6. pp. 278–283.
8. Astashchenko V. I., Ionkina N. P., Yansen G. I., Sorokin I. E., Gedberg M. G. Use of the “TOSOL-K” quenching fl uid for the bulk quenching of steels. Metal Science and Heat Treatment. 1982. Vol. 24. No. 5-6, pp. 377–380.
9. Chukin М. V., Poletskov P. P., Nabatchikov D. G., Gushchina М. S., Berezhnaya G. А. The effect of alloying elements on properties of steels at various cooling rates. Estestvennye i tekhnicheskie nauki. 2016. No. 8. pp. 62–65.
10. Maisuradze М. V., Yudin Yu. V., Ryzhkov М. А. Methodology for modeling the cooling process during heat treatment of steel products of a simple form. Stal. 2013. No. 10. pp. 90–94.
11. Kim W. W. Surface engineering innovative technology for the repair and protection of ships parts. Mekhanika mashin, mekhanizmov i materialov. 2018. No. 4. pp. 44–50.
12. GOST 1497–84. Metals. Methods of tension test. Introduced: 01.01.1986.
13. GOST 9454–78. Metals. Methods for testing the impact strength at low, room and high temperature. Introduced: 01.01.1979.
14. Bayati H., Rimmer A. L., Elliott R. The austempering kinetics and processing window in an austempered, low-manganese compacted-graphite cast iron. Cast Metals. 1999. Vol. 7, Iss. 1. pp. 11–24.
15. Yurchenko А. N., Simonov Yu. N., Efimova О. V. Identification of the complex structure of a structural steel by color etching. Metallovedenie i termicheskaya obrabotka metallov. 2019. No. 10. pp. 21–24.
16. Shveyova T. V., Muhametzyanova G. F., Astashchenko V. I. Characteristic features of the cooling capacity of aqueous polymer solutions. IOP Conference Series: Materials Science and Engineering. 2019. Vol. 570, Iss. 1. 012098.
17. Kim V. А., Mokritskiy B. Ya., Yakubov Ch. F. The effect of the microstructure of structural and alloy steels on wear resistance. Uprochnyayushchie tekhnologii i pokrytiya. 2018. Vol. 14. No. 1. pp. 7–11.
18. Suslov А. G. The development of the theory of contact stiffness and surface engineering of machine parts. Vestnik Bryanskogo gosudarstvennogo tekhnicheskogo universiteta. 2018. No. 11. pp. 12–17.
19. Astashchenko V. I., Shveyova T. V., Shveyov A. I. Diagnostics of the properties of steel articles according to the criterion of microhardness. Metal Science and Heat Treatment. 2016. Vol. 58. Iss. 5. pp. 303–307.

Language of full-text русский
Полный текст статьи Получить