| 2000 №03 (13) | 2000 №03 (02) |
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
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