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Microstructure and Mechanical Properties of Aircraft Steel 30Kh2GSN2VM

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Special features of structure formation in steel 30Kh2GSN2BM under continuous cooling from the temperature of complete austenitization and under an isothermal hold in the temperature range of bainitic transformation are studied. Metallographic and x-ray diffraction phase analysis are performed and tensile and impact bending tests of specimens are conducted. The data of the dilatometric and metallographic studies are used to plot a thermokinetic diagram of transformation of supercooled austenite. The laws of variation of mechanical properties of the steel after oil quenching and tempering and after normalizing in air and different variants of isothermal quenching are determined.

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  1. M. I. Goldshtein, S. V. Grachev, and Yu. G. Veksler, Special Steels [in Russian], Metallurgiya, Moscow (1985), 408 p.

  2. W. M. Garrison, “Ultrahigh-strength steels for aerospace applications,” JOM, 42, 20 – 24 (1990).

    Article  CAS  Google Scholar 

  3. T. Tomita “Development of fracture toughness of ultrahigh strength low alloy steels for aircraft and aerospace applications,” Mater. Sci. Technol., 7(6), 481 – 489 (1991).

    Article  CAS  Google Scholar 

  4. R. A. Mesquita, H.-J. Kestenbach, R. Balamuralikrishnan, and S. Karthikeyan, “Influence of silicon on secondary hardening of 5 wt.% Cr steels,” Mater. Sci. Eng. A, 556, 970 – 973 (2020).

    Article  Google Scholar 

  5. R. Veerbabu, “Nanoscale clusters in secondary hardening ultra-high strength steels with 1 and 3 wt.% Mo: An atom probe investigation,” J. Mater. Res., 35(14), 1763 – 1776 (2020).

    Article  Google Scholar 

  6. F. C. Campbell, Manufacturing Technology for Aerospace Structural Materials, Elsevier Ltd., Amsterdam (2006), 616 p.

  7. J. Rowe (ed.), Advanced Materials in Automotive Engineering, Woodhead Publishing (2012), 352 p.

  8. H. Bhadeshia and R. Honeycombe, Steels: Microstructure and Properties, Elsevier Ltd. (2017), 488 p.

  9. Z. Guo, L. Li, W. Yang, and Z. Sun, “Microstructure and mechanical properties of high-Mn TRIP steel based on warm deformation of martensite,” Metall. Mater. Trans. A, 46, 1704 – 1714 (2015).

    Article  CAS  Google Scholar 

  10. N. K. Tewary, S. K. Ghosh, D. Chakrabarti, and S. Chatterjee, “Deformation behaviour of low carbon high Mn TWIP/TRIP steel,” Mater. Sci. Technol., 35(12), 1483 – 1496 (2019).

    Article  CAS  Google Scholar 

  11. P. K. Mallick (ed.), Materials, Design and Manufacturing for Lighweight Vehicles, Woodhead Publishing (2010), 384 p.

  12. B. C. De Cooman, Y. Estrin, and S. K. Kim, “Twinning-induced plasticity (TWIP) steels,” Acta Mater., 142, 283 – 362 (2018).

    Article  Google Scholar 

  13. M. V. Maisuradze and M. A. Ryzhkov, “Thermal stabilization of austenite during quenching and partitioning of austenite for automotive steels,” Metallurgist, 62(3–4), 337 – 347 (2018).

    Article  CAS  Google Scholar 

  14. M. V. Maisuradze, Yu. V. Yudin, and A. A. Kuklina, “Increase in impact strength during bainite structure formation in HY-TUF high-strength steel,” Metallurgist, 63(7–8), 849 – 858 (2019).

    Article  CAS  Google Scholar 

  15. I. G. Speer, F. C. R. Assunção, D. K. Matlock, and D. V. Edmonds, “The “quenching and partitioning” process: Background and recent progress,” Mater. Res., 8(4), 417 – 423 (2005).

    Article  CAS  Google Scholar 

  16. X. Y. Long, J. Kang, B. Lv, and F. C. Zhang, “Carbide-free bainite in medium carbon steel,” Mater. Des., 64, 237 – 245 (2014).

    Article  CAS  Google Scholar 

  17. A. Yu. Kaletin and Yu. V. Kaletina, “The role of retained austenite in the structure of carbide-free bainite of construction steels,” Phys. Met. Metallogr., 119(9), 893 – 898 (2018).

    Article  CAS  Google Scholar 

  18. A. Yu. Kaletin, A. G. Ryzhkov, and Yu. V. Kaletina, “Enhancement of impact toughness of structural steels upon formation of carbide free bainite,” Phys. Met. Metallogr., 116(1), 109 – 114 (2015).

    Article  Google Scholar 

  19. J. Meng, Y. Feng, Q. Zhou, et al., “Effects of austempering temperature on strength, ductility and toughness of low-C high-Al/Si carbide-free bainitic steel,” J. Mater. Eng. Perform., 24, 3068 – 3076 (2015).

    Article  CAS  Google Scholar 

  20. F. G. Caballero, H. Roelofs, S. Hasler, et al., “Influence of bainite morphology on impact toughness of continuously cooled cementite free bainitic steels,” Mater. Sci. Technol., 28, 95 – 102 (2012).

    Article  CAS  Google Scholar 

  21. J. B. Bacalhau, C. Ramos, and M. Alfonso, “Effect of Ni addition on bainite microstructure of low-carbon special bar quality steels and its influence on CCT diagrams,” J. Mater. Res. Technol., 15, 1266 – 1283 (2021).

    Article  CAS  Google Scholar 

  22. C. Yao, H. Lan, Z. Tao, et al., “Enhanced strength and toughness of low-carbon bainitic steel by refining prior austenite grains and austempering below Ms,” Steel Res. Int., 92(11), 2100263 (2021).

    Article  CAS  Google Scholar 

  23. F. G. Caballero, C. Garcia-Mateo, and M. K. Miller, “Modern steels at atomic and nanometric scales,” Mater. Sci. Technol., 31(7), 764 – 772 (2015).

    Article  CAS  Google Scholar 

  24. M. V. Maisuradze and M. A. Ryzhkov, “Microstructure and mechanical properties of high strength alloyed steel for aerospace applications,” Solid State Phenom., 284, 351 – 356 (2018).

    Article  Google Scholar 

  25. A. T. Tumanov (ed.), Aviation Materials. Vol. 1. Structural Steels [in Russian], ONTI, Moscow (1975), 429 p.

  26. M. A. Ryzhkov and A. A. Popov, “Methodological aspects of plotting of thermokinetic diagrams of transformation of supercooled austenite in low-alloy steels,” Metal Sci. Heat Treat., 52, 612 – 616 (2011).

    CAS  Google Scholar 

  27. M. V. Maisuradze, Yu. V. Yudin, and M. A. Ryzhkov, “Numerical simulation of pearlitic transformation in steel 45Kh5MF,” Metal Sci. Heat Treat., 56, 512 – 516 (2015).

    Article  CAS  Google Scholar 

  28. T. A. Kop, J. Sietsma, and S. Van Der Zwaag, “Dilatometric analysis of phase transformations in hypo-eutectoid steels,” J. Mater. Sci., 36, 519 – 526 (2001).

    Article  CAS  Google Scholar 

  29. E. Pereloma and D. V. Edmonds (eds.), Phase Transformations in Steels, Woodhead Publishing (2012), 656 p.

  30. Z. Zhao, C. Liu, and D. O. Norhwood, “A new empirical formula for the bainite temperature limit of steel,” J. Mater. Sci., 36, 5045 – 5056 (2001).

    Article  CAS  Google Scholar 

  31. M. V. Maisuradze, M. A. Ryzhkov, and Yu. V. Yudin, “Rapid evaluation of the cooling capacity of quenching media,” Metal Sci. Heat Treat., 57(7–8), 515 – 518 (2015).

    Article  CAS  Google Scholar 

  32. E. El-Shenawy, H. Refaiy, and H. N. El-Din, “Thermal stability of retained austenite in advanced TRIP steel with bainitic ferrite matrix for automotive industries,” Mater. Sci. Forum, 1016, 429 – 434 (2021).

    Article  Google Scholar 

  33. K. Sugimoto and M. Mukherjee, “TRIP aided and complex phase steels,” in: R. Rana and S. B. Singh (eds.), Automotive Steels, Design, Metallurgy, Processing and Applications, Woodhead Publishing (2017), pp. 217 – 257.

  34. M. V. Maisuradze, D. I. Lebedev, M. A. Ryzhkov, et al., “Formation of microstructure and mechanical properties of aircraft steel under continuous cooling,” Stal’, No. 1, 56 – 63 (2022).

  35. M. V. Maisuradze, Yu. V. Yudin, A. A. Kuklina, and D. I. Lebedev, “Formation of microstructure and properties during isothermal treatment of aircraft building steel,” Metallurgist, 65(9–10), 1008 – 1019 (2022).

    Article  CAS  Google Scholar 

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The work has been performed within grant No. 22-29-00105 of the Russian Scientific Foundation.

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Correspondence to M. V. Maisuradze.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 45 – 53, August, 2022.

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Maisuradze, M.V., Kuklina, A.A., Lebedev, D.I. et al. Microstructure and Mechanical Properties of Aircraft Steel 30Kh2GSN2VM. Met Sci Heat Treat 64, 465–473 (2022).

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Key words

  • steel
  • heat treatment
  • microstructure
  • strength
  • toughness
  • thermokinetic diagram
  • bainite
  • retained austenite
  • isothermal quenching