The Paton Welding Journal, 2000, №03

2000 №03 (13)

2000 №03 (02)

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The Paton Welding Journal, 2000, #3, 5-9 pages

Peculiarities of welding T-joints made from high-strength steel 12KhGN2MFDRA

L.I. Mikhoduj¹, V.D. Poznyakov¹, B.G. Vasiljev¹, A.K. Yushchenko¹, Yu.I. Baryshnikov², V.A. Starodubtsev²

¹E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
²JSC Uralmashzavod, Russia

Abstract
Mechanical properties of high-strength alloyed steel 12KhGN2MFDRA and peculiarities of formation of welded joints in making fillet welds are investigated. It is shown that steel acquires high values of mechanical properties after quenching in combination with tempering. It is established that in T-joint welding within the range of 6-15 mm thicknesses the rate of cooling of HAZ metal of web and flange is varied from 1.8 to 60 ^oC/s. Within this interval of cooling rates the structure of HAZ metal is mainly formed in martensitic and bainitic regions with hardness HV 303-375.
Keywords: high-strength steel, hot-rolled sheets, heat treatment, microstructure, mechanical properties, cold resistance, T-joints, thermal cycle, flange, web, minimum cooling rate

References

1. Gladshtein, L.I., Bobylyova, L.A., Litvinenko, D.A. et al. (1973) Improvement of cold resistance of highstrength structural steel. Stal, 6, 541 - 546.
2. Lobanov, L.M., Mikhoduj, L.I., Gordonny, V.G. (1998) State-of-the-art and prospects of using high-strength steels with an improved weldability in welded structures. Avtomaticheskaya Svarka, 12, 29 - 34.
3. Sarzhevsky, V.A., Sazonov, V.Ya. (1981) Installation of simulation of welding thermal cycles on the base of MSR-75 machines. Ibid., 5, 69 – 70.

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Suggested Citation

L.I. Mikhoduj, V.D. Poznyakov, B.G. Vasiljev, A.K. Yushchenko, Yu.I. Baryshnikov, V.A. Starodubtsev (2000) Peculiarities of welding T-joints made from high-strength steel 12KhGN2MFDRA. The Paton Welding J., 03, 5-9.

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