Heat treatment of the increased stability die steel
DOI:
https://doi.org/10.15407/mom2020.02.029Keywords:
die steel, composition, thermal treatment, structure, mechanical propertiesAbstract
In the work, the heat treatment conditions of 4H4N5M4F2 die steel for hot deformation are investigated. The physico-mechanical properties of the investigated ingot steel were determined after quenching 1100 ± 5 °С and tempering. Given the importance of cooling regimes after tempering, various cooling regimes (in oil, in a furnace, in air) were investigated. Physical-mechanical properties of cast steel 4X4H5M4F2 after tempering at 550 ± 5 °C and 600 ± 5 °C were determined. The optimal tempering regime for steel at 550 ± 5 °C with air cooling was established: the ultimate strength of 1860 MPa and the yield strength of 1760 MPa. The optimal tempering regime for steel at 600 ± 5 °C with air cooling has been established: the ultimate strength is 1600 MPa, the yield strength is 1500 MPa, and the heat resistance is 48.5 HRC. It was established that twofold hardening and tempering of steel at 600 ± 5 °C temperature with oil cooling leads to an increase in its fracture toughness (75 J/cm2) compared with the fracture toughness after air cooling (30 J/cm2). It is established that the temperature range of tempering brittleness of the studied steel is 465 ‑ 495 °С. The optimized temperature regime of tempering of the investigated steel (590 ± 5 °С) made it possible to increase the impact strength by a factor of two (up to 30 J/cm2) in the temperature range 465 ‑ 495 °С. A pilot test of the punch tool made from the investigated steel was carried out. During hot pressing of the AK7ch aluminum alloy, the life of the dies was at the level of forged steel 4Kh5MF1S with a nitrided surface layer, which was used at the factory. After the operation of both matrices (hot deformation), samples were cut and tested for hardness and toughness. The latter turned out to be higher for the forged steel, however, the service life of the matrices from both steels was at the same level.
References
Kurdiumov G. V., Utevskyi L. M., Entin R. I. Prevrashcheniia v zheleze i stali (The transformation in iron and steel), Moscow, Nauka, 1977, 236 p. [in Russian].
Zavialov A. S. K teorii legirovaniia i termicheskoi obrabotki stali (To the theory of alloying and heat treatment of steel), NKTP-SSSR TsNII, 1943, 132 p. [in Russian].
Gudtsov N. T. (Eds.). D. K. Chernov i nauka o metallah (D. K. Chernov and the science of metals), Moscow, Metallurgizdat, 1950, 563 p. [in Russian].
Kurdiumov G. V. Yavleniia zakalki i otpuska (Hardening and tempering phenomena), Moscow, Metallurgizdat, 1960, 64 p. [in Russian].
Bokshtein S. Z. Struktura i mehanicheskiie svoistva legirovannoi stali (The structure and mechanical properties of alloy steel), Moscow, Metallurgizdat, 1954, 279 p. [in Russian].
Hudremon E., Zaimovskyi A. S., Bernshtein M. L. (Eds.). Spetsialnyie stali (Special steels), Trans from Ger, Moscow, Metallurgizdat, 1959, 952 p. [in Russian].
Meskin, V. S. Osnovy legirovaniia stali (The steel alloying basics), Moscow, Metallurgizdat, 1959, 688 p. [in Russian].
Spektor Ya. I., Sarrak V. I., Entin R. I. Fizika metallov I metallovedeniie,1964, Vol.18, No. 6, pp. 915-920 [in Russian].
Lysak L. I., Nikolin B. I. Fizicheskie osnovy termicheskoi obraboiki stali (Physical fundamentals of heat treatment of steel), Kyiv, Tekhnika, 1975, 304 p. [in Russian].
Kasylov A. N., Kasylov O. A. Naukovyi visnyk Khersonskoi derzhavkoi morskoi akademii, 2013, Vol. 9, No. 2, pp. 171-182 [in Russian].
Hohaiev K. O., Radchenko O. K., Sydorchuk O. M., Lukianchuk V. V. Tekhnolohiia vyhotovlennia shtampovoi stali 40KH3N5M3F dlia hariachoho deformuvannia, Tsilova kompleksna prohrama NAN Ukrainy «Problemy resursu i bezpeky ekspluatatsii konstruktsii, sporud ta mashyn» Instytut elektrozvariuvannia im. YE. O. Patona NAN Ukraiiny (Target complex program of NAS of Ukraine "Problems of the resource and safety of the exploitation of structures, construction and machines" Ye. O. Paton Institute of electric welding NAS of Ukraine), 2015, pp. 669-672 [in Ukrainian].
Hohaiev K.O., Sydorchuk O.M., Radchenko O.K., Karpets M.V., Piatachuk, S.H., Metalofizyka ta novitni materialy, 2015, Vol. 37, No. 12, pp 1653-1661 [in Ukrainian]. https://doi.org/10.15407/mfint.37.12.1653
Hohaiev K. O., Sydorchuk O. M., Radchenko O. K. Metaloznavstvo ta obrobka metaliv, 2016, No. 3, pp. 18-24 [in Ukrainian].
Hohaiev K. O., Sydorchuk O. M., Radchenko O. K., Lukianchuk V. V., Orel H. H. Pratsi instytutu problem materialoznavstva im. I. M. Frantsevycha NAN Ukrainy. Seriia “Fizyko-himichni osnovy tehnolohii poroshkovyh materialiv”, 2016, Vol. 25, pp. 105-108 [in Ukrainian].
Hohaiev K. O., Laskonev O. P., Radchenko O. K., Dudetska L.R., Sydorchuk O.M. Anotovanyi zbirnyk proektiv spilnoho konkursu DFFD-BRFFD, Akademperiodyka, 2017, pp. 125-128 [in Ukrainian].
Sydorchuk O. M., Suchasni problem fizychnoho materialoznavstva. Pratsi instytutu problem materialoznavstva im. I. M. Frantsevycha NAN Ukrainy. Seriia “Fizyko-himichni osnovy tehnolohii poroshkovyh materialiv” Kyiv, 2013, Vol 22, pp. 186‑188 [in Ukrainian].
Hohaiev K. O., Sydorchuk O. M., Radchenko O. K., Mamonova A. A., Metaloznavstvo ta obrobka metaliv, 2014, No. 1, pp. 40-44 [in Ukrainian].
Patent No. 94746 Ukraine. MPK С21 / D8 / 00. Sposib termichnoyi obrobky stali dlya haryachoho presuvannya [Method for heat treatment of hot pressing steel], Hohaiev, K. O., Sydorchuk, O. M., Radchenko, O. K., Lukianchuk, V. V., No. u201407076; zaiavl. 23.06.2014; opubl. 25.11.2014, Biul. No.22/2014, 4 p. [in Ukrainian].
Panchenko E. V., Skakov Yu. A., Krimer B. I., Arsentiev P. P., Popov K. V., Tsviling, M. Ya., Laboratoriia metallografii (Metallography laboratory), Moscow, Metallurgiia, 1965, 440 p. [in Russian].
Sydorchuk O.M., Myroniuk D.V., Radchenko O.K., Hohaiev K.O. Hongguang Ye, Metaloznavstvo ta obrobka metaliv, 2019, No.2, pp. 19-25 [in Ukrainian]. https://doi.org/10.15407/mom2019.02.019
Kucheriavyi, V. I., Arzamasov, B. N., Brostrem, V. A. Shtampovye stali dlia goriachego deformirovaniia. Konstruktsionnyie materialy: spravochnik (Die steel for hot deformation. Construction materials: Handbook), Moscow, Mashinostroieniie, 1990, 688 p. [in Russian].
Pozniak, L. A. Instrumentalnyye stali (Instrument steels), Kiev: Naukova Dumka, 1996, 488 p. [in Ukrainian].
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