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Inorganic Materials: Applied Research

, Volume 9, Issue 6, pp 1076–1089 | Cite as

Structure and Properties of the Heat-Affected Zone of Low-Alloy Cold-Resistant Steel for Arctic Application

  • O. V. SychEmail author
  • E. I. Khlusova
  • U. A. Pazilova
  • E. A. Yashina
METAL SCIENCES. METALLURGY
  • 1 Downloads

Abstract—The paper presents the results of a comprehensive study of structural and property changes in the most dangerous regions of the heat-affected zone of low-alloy cold-resistant steel with a guaranteed yield strength of 355–390 MPa before and after the post-welding tempering, including those caused by the combined impact of heating temperature under tempering and deformation, compared to base metal. The simulation was performed using a DIL 805 dilatometer and a Gleeble 3800 complex. The results of the investigation of the structure and properties of actual welded joints after welding with different rates of energy input (3.5 and 6 kJ/mm) are presented.

Keywords:

base metal coarse-grain HAZ region partial recrystallization HAZ region post-welding tempering bainite ferrite-carbide mixture recrystallization deformation rate deformation capacity fracture mode welded joint 

Notes

ACKNOWLEDGMENTS

Experimental studies were performed using the equipment of the Composition, Structure, and Properties of Structural and Functional Materials Center for Collective Use of the National Research Center Kurchatov Institute—CRISM Prometey with financial support of the Ministry of Education and Science of the Russian Federation, agreement no. 14.595.21.0004 (RFMEFI59517X0004).

REFERENCES

  1. 1.
    Sych, O.V., Khlusova, E.I., and Yashina, E.A., Industrial production technology of thick plates from low-carbon low-alloyed cold-resistant Arc-indexed steels in industrial conditions, Tyazh. Mashinostr., 2017, nos. 11–12, pp. 2–10.Google Scholar
  2. 2.
    Harrison, P.L. and Hart, P.H.M., HAZ microstructure and its role in the fracture of microalloyed steels welds, The Institute of Materials Second Griffith Conf. “Micromechanisms of Fracture and Their Structural Significance,” Sheffield, UK, September 13–15, 1995, London: Inst. Mater., 1995, pp. 57–68.Google Scholar
  3. 3.
    Kruglova, A.A., Orlov, V.V., and Sharapova, D.M., Modeling heating effects in the heat-affected zone of high-strength pipe steel K70 with double-pass submerged arc welding, Metallurgist, 2015, vol. 58, nos. 9–10, pp. 806–814.CrossRefGoogle Scholar
  4. 4.
    Khlusova, E.I. and Orlov, V.V., Change in the structure and properties in the heat affected zone of welded joints made from low-carbon ship-building and pipe steels, Metallurgist, 2013, vol. 56, nos. 9–10, pp. 684–699.CrossRefGoogle Scholar
  5. 5.
    Goli-Oglu, E.A., Influence of heat treatment after welding on the microhardness of steel joints in marine platforms, Steel Transl., 2016, vol. 46, no. 5, pp. 361–363.CrossRefGoogle Scholar
  6. 6.
    Pazilova, U.A., Il’in, A.V., Kruglova, A.A., Motovilina, G.D., and Khlusova, E.I., Influence of the temperature and strain rate on the structure and fracture mode of high-strength steels upon the simulation of the thermal cycle of welding and post-welding tempering, Phys. Met. Metallogr., 2015, vol. 116, no. 6, pp. 606–614.CrossRefGoogle Scholar
  7. 7.
    Kostin, V.A., Grigorenko, G.M., Poznyakov, V.D., et al., Influence of welding thermal cycle on structure and properties of microalloyed structural steels, Paton Weld. J., 2012, no. 12, pp. 8–14.Google Scholar
  8. 8.
    Karkhin, V.A., Teplovye protsessy pri svarke (Thermal Processes during Welding), St. Petersburg: S.-Peterb. Politekh. Univ., 2013.Google Scholar
  9. 9.
    Grabin, V.F. and Denisenko, A.V., Metallovedenie svarki nizko- i srednelegirovannykh stalei (Material Science of Welding of Low- and Medium-Alloyed Steels), Kiev: Naukova Dumka, 1978.Google Scholar
  10. 10.
    Kostin, V.A., Grigorenko, G.M., Solomijchuk, T.G., et al., Microstructure of HAZ metal of joints of high-strength structural steel Weldox 1300, Paton Weld. J., 2013, no. 3, pp. 6–13.Google Scholar
  11. 11.
    Zhao, H., Wynne, B.P., and Palmiere, E.J., Conditions for the occurrence of acicular ferrite transformation in HSLA steels, J. Mater. Sci., 2018, vol. 53, no. 5, pp. 3785–3804. doi 10.1007/s10853-017-1781-3CrossRefGoogle Scholar
  12. 12.
    Wan, X.L., Wei, R., and Wu, K.M., Effect of acicular ferrite formation on grain refinement in the coarse-grained region of heat-affected zone, Mater. Charact., 2010, vol. 61, pp. 726–731.CrossRefGoogle Scholar
  13. 13.
    Lee, S.G., Lee, D.H., Sohn, S.S., Kim, W.G., Um, K.-K., Kim, K.-S., and Lee, S.H., Effects of Ni and Mn addition on critical crack tip opening displacement (CTOD) of weld-simulated heat-affected zones of three high-strength low alloy (HSLA) steels, Mater. Sci. Eng., A, 2017, vol. 697, pp. 55–65.CrossRefGoogle Scholar
  14. 14.
    Bhadeshia, H.K.D.H. and Honeycombe, R., Steels: Microstructure and Properties, Amsterdam: Elsevier, 2006.Google Scholar
  15. 15.
    Komizo, Y. and Fukada, Y., CTOD properties and M–A constituent in the HAZ of C–Mn microalloyed steel, Q. J. Jpn. Weld. Soc., 1988, vol. 6, no. 1, pp. 41–46.CrossRefGoogle Scholar
  16. 16.
    Cao, R., Li, J., Liu, D.S., Ma, J.Y., and Chen, J.H., Micromechanism of decrease of impact toughness in coarse-grain heat-affected zone of HSLA steel with increasing welding heat input, Metall. Mater. Trans. A, 2015, vol. 46, no. 7, pp. 2999–3014.CrossRefGoogle Scholar
  17. 17.
    Longfei, L., Wangyue, Y., and Zuqing, S., Dynamic recrystallization of ferrite in a low-carbon steel, Metall. Mater. Trans. A, 2006, vol. 37, vol. 3, pp. 609–619.Google Scholar
  18. 18.
    Novikov, I.I., Teoriya termicheskoi obrabotki metallov (Theory of Heat Treatment of Metals), Moscow: Metallurgiya, 1986, pp. 54.Google Scholar
  19. 19.
    Sych, O.V., Orlov, V.V., Kruglova, A.A., and Khlusova, E.I., Changing the structure of high-strength tubular steel of strength class K70–K80 during varying high-temperature tempering modes after thermomechanical treatment, Vopr. Materialoved., 2011, no. 1 (65), pp. 89–99.Google Scholar
  20. 20.
    Yang, B. and Xuan, F.-Z., Creep behavior of subzones in a CrMoV weldment characterized by the in situ creep test with miniature specimens, Mater. Sci. Eng., A, 2018, vol. 723, pp. 148–156.CrossRefGoogle Scholar
  21. 21.
    Zemzin, V.N. and Shron, R.Z., Termicheskaya obrabotka i svoistva svarnykh soedinenii (Heat Treatment and Properties of Welded Joints), Leningrad: Mashinostroenie, 1978.Google Scholar
  22. 22.
    Orlov, A.N., Perevezentsev, V.N., and Rybin, V.V., Granitsy zeren v metallakh (Grain Boundaries in Metals), Moscow: Metallurgiya, 1980. Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • O. V. Sych
    • 1
    Email author
  • E. I. Khlusova
    • 1
  • U. A. Pazilova
    • 1
  • E. A. Yashina
    • 1
  1. 1.National Research Center Kurchatov Institute—CRISM PrometeySt PetersburgRussia

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