The paper presents a brief analysis of the numerical and experimental methods for assessing the resistance to the cold cracks formation in metal welded joints, their positive qualities and disadvantages in relation to welded joints of ship hull structures of economically alloyed high strength steel grades of the new generation. It is justified that the experimental methods are necessary to assess the resistance to cold cracks. The choice of the test type (Tekken Test) is also justified. To improve the detection of cold cracks and to reduce the probability of failure in welded joints at the stage of operation, it is proposed to introduce a duplicate nondestructive testing of welded joints, recognized as fit by the results of the primary control. The results of the experimental studies are presented. Based on the results obtained, improvements to the RS requirements are proposed.

Keywords: cold cracks, high strength steel, hydrogen diffusion, residual stresses, Tekken test.

UDC 621.791

About authors:

M.A. Ivanov - PhD, associate professor, South Ural State University, Chelyabinsk, e-mail: IvanovMA@susu.ru

A.K. Tingaev - PhD, associate professor, South Ural State University, Chelyabinsk

I.A. Ilyin - South Ural State University, Chelyabinsk

Pages: 64-77

References

1. Goncharov, N.D. Povyshenie stoykosti svarnykh soedineny trub protiv obrazovaniya kholodnykh treschin [Increase of resistance of welded joints of pipes against formation of cold cracks] / N.D. Goncharov, O.I. Kolesnikov, A.A. Bratus // Science and technology of pipeline transportation of oil and oil products. –2014. № 3 (15). – P. 63-67

2. Goncharov S.N. Kholodnye treschiny pri svarke vysokoprochnykh srednelegirovannykh staley [Tekst]: [monografiya] [Cold cracks in welding of high strength medium alloy steels [Text]: [monograph] / S.N. Goncharov, M.P. Shalimov, M of education and science of the Russian Federation, Ural Federal University, 2012.–94, [1] p.

3. Efimenko L.A., Elagina O.Yu., Vyshemirskii E.M., Kapustin O.E., Muratov A.V., Pugaev A.K. Traditsionnye i perspektivnye stali dlya stroitelstva magistralnykh truboprovodov [Traditional and perspective steels for the construction of main pipelines], –M.:Logos, 2011, 316 p.

4. Makarov E.L. Kholodnye treschiny pri svarke legirovannykh staley. [Cold cracks in welding of alloy steels]. Mechanical engineering, 1981. 247 p.

5. Muravyev K.A. Issledovanie raspredeleniya vodoroda v svarnom soedinenii v zavisimosti ot temperaturnykh uslovy [Study of the distribution of hydrogen in a welded joint depending on the temperature conditions]// Technical science – theory to practice. At the VIII Intern. scientific–prakt. Conf. – Novosibirsk: Sibak, 2012.

6. Terasaki T., Akiyama T., Oshita S. Study of local hydrogen content associated with root cracking. Quarterly Journal Of The Japan Welding Society, (1986) 4 (2):378-383.

7. GOST R ISO 17642-2- Resistance tests to cold cracks in welded joints. Tests of destructive welds of metal materials. Arc welding processes. Part 2. Tests with natural stiffness, 2012.

8. GOST 26388-84. Welded joints. Test methods for resistance to cold crack formation in fusion welding.

9. EN ISO 17642-3 Destructive testing of weld metal materials. Resistance tests to cold cracks in welded joints. Arc welding processes. Part 3. Tests with the application of an external load (ISO 17642-3:2005).

10. Kannengiesser, Th., Boellinghaus Th. Cold cracking tests-an overview of modern technologies and applications // Welding in the world. February 2013, volume 57, Issue 1, pp. 3–37.

11. DNV Rules for Classification Ships. Part 2 Materials and Welding. – 2018. – 217 p.

12. ABC Rules for Materials and Welding (Part 2). – 2018. – 465 p.

13. LR Rules for the Manufacture, Testing and Certification of Materials. – 2018. – 451 p.

14. Rules for Classification and Construction of Sea-Going Ships. Part XIII Materials. Russian Maritime Register of Shipping. – 2018. – 190 p. [In Russian]

15. International Association of Classification Societies. Requirements concerning Materials and Welding. – 2016. – 320 p.

16. Vyshemirsky E.M. Issledovanie svarivaemosti i razrabotka tekhnologii svarki vavysokoprochnykh trubnykh staley v usloviyakh Kraynego Severa: dissertatsiya kandidata tekhnicheskikh nauk: 05.03.06 [Investigation of weldability and development of technologies of welding high strength pipe steels in conditions of the far North: thesis dissertation of the candidate of technical Sciences: 05.03.06] / E.M. Vyshemirsky [Thesis affiliation: Gubkin Russian State University of Oil and Gas]. – Moscow, 2009. – 134 p.

17. Vyshemirsky D.E. Obosnovanie kriticheskogo znacheniya ekvivalent ugleroda na osnove otsenki svarivaemosti staley dlya trub klassa prochnosti K65 i K70: the dissertation of the candidate of technical sciences: 05.02.10 [Substantiation of the critical value of carbon equivalent on the basis of steel weldability assessment for pipes of strength class K65 and K70: thesis of candidate of technical sciences: 05.02.10] / D.E. Vyshemirsky [thesis affiliation: MOSCOW state technical University named after N. Uh. Bauman" (National Research University)], 2017. – 138 p.

18. GOST R 56143-2014 Testing of destructive welds of metal materials. Resistance tests to cold cracks in welded joints. Arc welding processes. Part 3. Tests with the application of an external load.

19. AWS B4.0M: 2000: Standard Methods for Mechanical Testing of Welds, Approved by American National Standards Institute, July 25, 2000.

20. JSA-JIS Z 3157 Method of U-Groove Weld Cracking Test. 1993.

21. TGL 14914 Blatt 5 Ausgabe Juni: Weldability testing – cold cracking resistance of the weld. [In German] 1988.

22. JSA-JIS Z 3158 Method of Y-Groove Weld Cracking Test. 2016.

23. BS EN ISO 17642-2: "Destructive tests on welds in metallic materials – Cold cracking tests for weldments – Arc welding processes – Part 2: Self-restrain tests" 2005.

24. Schwenk C., Kannengiesser Th., Rethmeier restrict conditions and welding residential stresses in self-restricted cold cracking tests. Proceedings of Trends in welding research, Georgia, USA, 8th International Conference, ISBN -13 978-1-61503-002-6, 2008, pp. 766–773.

25. Pargeter R.J. and Wright M.D. Welding of Hydrogen-Charged Steel for Modification or Repair / Welding Research. –2010. Vol.89-pp. 34–42.

26. OR-91.200.00-KTN-074-12 Industry-specific regulations "Procedure of organization and implementation of construction control over compliance with design solutions and quality construction of underwater crossings of OTP and OPTP" (with Amendment No. 2) PJSC "Transneft".

27. IACS Req. High Strength Steels for Welded Structures 1984/Rev.3 2016 W16.

28. Guidelines on Technical Supervision of Applcation of Welding in Shipbuilding and Ship Repair. Russian Maritime Register of Shipping. – 2010. – 227 p. [In Russian]

29. Rules for Сlassification and Construction of Sea-Going Ships. Part XIV. Welding. – 2018. – 106 p. [In Russian]

30. GOST R ISO 857-1-. Welding and related processes. Dictionary. Part 1. The processes of welding of metals. Terms and definitions, 2009.

For citation: M.A. Ivanov, A.K. Tingaev, I.A. Ilyin. Improvement of RS requirements for the cold cracks resistance in welded joints of ship hull high-strength steel structures. Research Bulletin by Russian Maritime Register of Shipping. 2019, No. 54/55, pp. 64-77.