The effect of the tempering temperature on the structure and mechanical properties of thermomechanically strengthened rebar rolled products

N. N. Sergeev ; A. N. Sergeev ; S. N. Kutepov ; A. V. Rodionov ; A. E. Gvozdev ; O. V. Kuzovleva ; E. S. Krupitsyn

Čebyševskij sbornik, Tome 22 (2021) no. 5, pp. 328-339.

Résumé

The article considers the influence of the tempering temperature on the structure and mechanical properties of low-carbon reinforcing steels of grades St3 and St5. It is established that steel of the St3 brand in bars $\varnothing$ 14 mm is effectively processed by the VTMO method, being strengthened to the level of the 3rd class. The mechanical properties recorded directly after the VTMO are steadily preserved after the release by electric heating to tempera-tures of 350$\ldots$370$^\circ$C. It was found that after tempering at a temperature of 500$\ldots$ 550$^\circ$C, the hardening in St5 steel remains at the level of the 6th strength class only if the heating is carried out according to the speed mode (28$^\circ$ C/sec). It is shown that the substructure created during VTMO is de-stroyed during accelerated tempering to a lesser (to a lesser) extent than after furnace tempering. All this determines a higher level of steel hardening as a result of VTMO and high-speed tempering.

Détail

Keywords: reinforcing steel, mechanical properties, tempering, high-temperature thermomechanical treatment.

Bibliographie

[1] A. A. Kugushin, I. G. Uzlov, V. V. Kalmykov, S. A. Madatyan, I. V. Ivchenko, Vysokoprochnaya armaturnaya stal, Metallurgiya, M., 1986, 272 pp.

[2] Uzlov G. I., “Termicheskoe uprochnenie prokata — effektivnyi put ekonomii metalla”, Metallovedenie i termicheskaya obrabotka metallov, 1985, no. 8, 18–21

[3] N. N. Sergeev, A. N. Sergeev, A. E. Gvozdev, A. N. Chukanov, S. N. Kutepov, O. V. Pantyukhin, “Issledovanie vliyaniya legirovaniya na mekhanicheskie i korrozionnye svoistva armaturnogo prokata”, Izvestiya Tulskogo gosudarstvennogo universiteta. Tekhnicheskie nauki, 2018, no. 7, 117–131

[4] N. N. Sergeev, A. N. Sergeev, S. N. Kutepov, A. E. Gvozdev, E. V. Ageev, “Vliyanie rezhimov termicheskoi obrabotki na stoikost vysokoprochnoi armaturnoi stali k vodorodnomu rastreskivaniyu”, Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta. Seriya: Tekhnika i tekhnologii, 7:4 (25) (2017), 6–20 | MR

[5] GOST 10884-94. Stal armaturnaya termomekhanicheski uprochnennaya dlya zhelezobetonnykh konstruktsii. Tekhnicheskie usloviya, Standartinform, M., 2009, 29 pp.

[6] N. N. Sergeev, A. N. Sergeev, S. N. Kutepov, A. E. Gvozdev, M. V. Ushakov, V. V. Izvolskii, Fiziko-mekhanicheskie i korrozionnye svoistva metallicheskikh materialov, ekspluatiruemykh v agressivnykh sredakh: monografiya, Infra-Inzheneriya, M.–Vologda, 2020, 556 pp.

[7] Dorofeev G. A., Zinyagin G. A., Makarov A. N., Proizvodstvo stali na osnove zheleza pryamogo vosstanovleniya, monografiya, TNT, Staryi Oskol, 2021, 324 pp.

[8] M. Kh. Shorshorov, A. E. Gvozdev, A. N. Sergeev, S. N. Kutepov, O. V. Kuzovleva, E. M. Seledkin, D. S. Klementev, A. A. Kalinin, Modelirovanie protsessov resursosberegayuschei obrabotki slitkovykh, poroshkovykh, nanostrukturnykh i kompozitsionnykh materialov: mono-grafiya, izd. 2-e, ispr. i dop., Infra-Inzheneriya, M.-Vologda, 2021, 360 pp.

[9] N. N. Sergeev, A. N. Sergeev, S. N. Kutepov, A. E. Gvozdev, A. N. Chukanov, E. V. Ageeva, “Vliyanie termicheskoi obrabotki na mekhanicheskie svoistva armaturnogo prokata”, Izvestiya Yugo-Zapadnogo gosudarstvennogo uni-versiteta. Seriya: Tekhnika i tekhnologii, 11:2 (2021), 8–25

[10] N. N. Sergeev, A. N. Sergeev, S. N. Kutepov, A. E. Gvozdev, E. V. Ageev, “Vliyanie rezhimov vysokotemperaturnoi termomekhanicheskoi obrabotki na mekhanicheskie svoistva armaturnogo prokata”, Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta, 23:2 (2019), 29–52

[11] O. V. Kuzovleva, A. E. Gvozdev, I. V. Tikhonova, N. N. Sergeev, A. D. Breki, N. E. Starikov, A. N. Sergeev, A. A. Kalinin, D. V. Malii, Yu. E. Titova, S. E. Aleksandrov, N. A. Krylov, O sostoyanii predprevrascheniya metallov i splavov, monografiya, Izd-vo TulGU, Tula, 2016, 245 pp.

[12] A. E. Gvozdev, A. G. Kolmakov, D. A. Provotorov, I.V. Minaev, N. N. Sergeev, I. V. Tikhonova, “Vliyanie raznozernistosti austenita na kinetiku perlitnogo prevrascheniya v malo- i sredneuglerodistykh nizkolegirovannykh stalyakh”, Materialovedenie, 2014, no. 7, 23–26

[13] G. M. Zhuravlev, D. N. Romanenko, A. E. Gvozdev, S. N. Kutepov, O. M. Gubanov, “Temperature field calculation at incomplete hot processing of metal alloys”, Steel in Translation, 49:10 (2019), 716–719 | DOI

[14] N. N. Sergeev, I. V. Minaev, I. V. Tikhonova, A. E. Gvozdev, A. G. Kolmakov, A. N. Sergeev, S. N. Kutepov, D. V. Malii, “Selecting Laser Cutting Modes for Engineering Steel Sheets Aiming at Provision of the Required Properties of Surface Quality”, Inorganic Materials: Applied Research, 11:4 (2020), 815–822 | DOI

[15] N. N. Sergeev, A. N. Sergeev, S. N. Kutepov, A. E. Gvozdev, A. G. Kolmakov, D. S. Klementev, “Influence of Heat Treatment on Residual Stress Formation in the Wear-Resistant Steel 60-Steel 15-Steel 60 Bimetal Material”, Inorganic Materials: Applied Research, 12:1 (2021), 5–9 | DOI

[16] A. E. Gvozdev, N. N. Sergeyev, I. V. Minayev, I. V. Tikhonova, A. N. Sergeyev, D. M. Khonelidze, D. V. Maliy, I. V. Golyshev, A. G. Kolmakov, D. A. Provotorov, “Temperature distribution and structure in the heat-affected zone for steel sheets after laser cutting”, Inorganic Materials: Applied Research, 8:1 (2017), 148–152 | DOI