Electronic Scientific Journal
 
Diagnostics, Resource and Mechanics 
         of materials and structures
Рус/Eng  

 

advanced search

IssuesAbout the JournalAuthorContactsNewsRegistration

2016 Issue 6

2022 Issue 4
 
2022 Issue 3
 
2022 Issue 2
 
2022 Issue 1
 
2021 Issue 6
 
2021 Issue 5
 
2021 Issue 4
 
2021 Issue 3
 
2021 Issue 2
 
2021 Issue 1
 
2020 Issue 6
 
2020 Issue 5
 
2020 Issue 4
 
2020 Issue 3
 
2020 Issue 2
 
2020 Issue 1
 
2019 Issue 6
 
2019 Issue 5
 
2019 Issue 4
 
2019 Issue 3
 
2019 Issue 2
 
2019 Issue 1
 
2018 Issue 6
 
2018 Issue 5
 
2018 Issue 4
 
2018 Issue 3
 
2018 Issue 2
 
2018 Issue 1
 
2017 Issue 6
 
2017 Issue 5
 
2017 Issue 4
 
2017 Issue 3
 
2017 Issue 2
 
2017 Issue 1
 
2016 Issue 6
 
2016 Issue 5
 
2016 Issue 4
 
2016 Issue 3
 
2016 Issue 2
 
2016 Issue 1
 
2015 Issue 6
 
2015 Issue 5
 
2015 Issue 4
 
2015 Issue 3
 
2015 Issue 2
 
2015 Issue 1

 

 

 

 

 

A. Yu. Kaletin, Yu. V. Kaletina

EFFECT OF LOW-TEMPERATURE TEMPERING ON THE PROPERTIES OF STRUCTURAL CARBIDE-FREE BAINITIC STEELS

DOI: 10.17804/2410-9908.2016.6.063-068

Mechanical properties of chromium-nickel-molybdenum-silicon steels with carbon contents of 0.18% and 0.27 % after slow continuous cooling with the cooling rate Vcool = 5 °С/min in the bainitic temperature range are investigated. It is shown that, after this heat treatment, a carbide-free bainitic structure is formed in the investigated steels, which is a two-phase mixture of carbon-depleted bainitic ferrite and carbon-enriched retained austenite with different morphology. The retained austenite in the carbide-free bainite is substantially enriched with carbon and contains its considerable part from the total carbon content in the steel. It is demonstrated that tempering for 1...2 hours at a temperature of 300 °С raises the values of impact strength of the 18Kh2N2SM and 27Kh2N2SM steels after slow continuous cooling, which have a different proportion of lower lath and upper globular bainite, retained austenite and martensite in their structure. It has been found that such tempering is accompanied by retained austenite stabilization due to a noticeable increase in carbon content in it.

Keywords: continuous cooling, carbide-free bainite, retained austenite, bainitic ferrite, carbon, cementite, mechanical properties, strength, impact strength.

Bibliography:

  1. Bojarski Z., Bold T. Structure and properties of carbide-free-bainite. Acta Metallurgica, 1974, vol. 22, iss. 10, pp. 1223–1234. DOI: 10.1016/0001-6160(74)90136-9.
  2. Caballero F.G., Bhadeshia H.K.D.H. Very strong bainite. Current Opinion in Solid State and Materials Science, 2004, vol. 8, iss. 3, pp. 251–257. DOI:10.1016/j.cossms.2004.09.005.
  3. García-Mateo C., Caballero F.G., Bhadeshia H.K.D.H. Mechanical Properties of Low-Temperature Bainite. Materials Science Forum, 2005, vols. 500–501, pp. 495–502. DOI: 10.4028/www.scientific.net/MSF.500-501.495.
  4. Bhadeshia H.K.D.H., Edmonds D.V. Bainite in silicon steels: new composition-property approach. Part I. Metal Science, 1983, vol. 17, iss. 9, pp. 411–419. DOI: 10.1179/030634583790420600.
  5. Khotinov V.A., Farber V.M., Morozova A.N. Evaluating the toughness of pipe steels by impact fracture curves. Diagnostics, Resource and Mechanics of materials and structures, 2015, iss. 2, pp. 57–66. DOI: 10.17804/2410-9908.2015.2.057-066. Available at: http://dream-journal.org/DREAM_Issue_2_2015_Khotinov_V.A._et_al._57_66.pdf.
  6. Georgiev M.N., Kaletin A.Yu., Simonov Yu.N., Schastlivtsev V.M. Effect of stability of retained austenite on the crack resistance of structural steel. Fiz. Met. Metalloved., 1990, iss. 1, pp. 113–121. (In Russian).
  7. Kaletin A.Yu., Ryzhkov A.G., KaletinaYu.V. Enhancement of impact toughness of structural steels upon formation of carbide-free bainite. The Physics of Metals and Metallography, 2015, vol. 116, no. 1, pp. 114–120. (In Russian).
  8. Caballero F.G., Garcia-Mateo C., Santofimia M.J., Miller M.K., Garcia de Andres C. New experimental evidence on the incomplete transformation phenomenon in steel. Acta Materialia, 2009, vol. 57, iss. 1, pp. 8–17. DOI: 10.1016/j.actamat.2008.08.041.
  9. Caballero F.G., Miller M.K., Babu S.S., Garcia-Mateo C. Atomic scale observations of bainite transformation in a high carbon high silicon steel. Acta Materialia, 2007, vol. 55, iss. 1, pp. 381–390. DOI: 10.1016/j.actamat.2006.08.033.
  10. Shchastlivtsev V.M., Kaletina Yu.V., Smirnov M.A., Kaletin A.Yu. The structure and properties of structural steels after thermomechanical treatment in the bainitic temperature range. Deformatsiya i Razrushenie Materialov, 2011, no. 4. pp. 1–9 (In Russian).


PDF      

Article reference

Kaletin A. Yu., Kaletina Yu. V. Effect of Low-Temperature Tempering on the Properties of Structural Carbide-Free Bainitic Steels [Electronic resource] // Diagnostics, Resource and Mechanics of materials and structures. - 2016. - Iss. 6. - P. 63-68. -
DOI: 10.17804/2410-9908.2016.6.063-068. -
URL: http://eng.dream-journal.org/issues/2016-6/2016-6_105.html
(accessed: 10/07/2022).  

 

impact factor
RSCI 0.42

 

MRDMS 2022
Google Scholar


NLR

 

Founder:  Institute of Engineering Science, Russian Academy of Sciences (Ural Branch)
Chief Editor:  S.V. Smirnov
When citing, it is obligatory that you refer to the Journal. Reproduction in electronic or other periodicals without permission of the Editorial Board is prohibited. The materials published in the Journal may be used only for non-profit purposes.
Contacts  
 
Home E-mail 0+
 

ISSN 2410-9908 Registration SMI Эл № ФС77-57355 dated March 24, 2014 © IMACH of RAS (UB) 2014-2022, www.imach.uran.ru