The Paton Welding Journal, 2007, №01

2007 №01 (01)

2007 №01 (03)

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The Paton Welding Journal, 2007, #1, 8-13 pages

New procedure for evaluation of cold cracking resistance of hardening steel welded joints

V.M. Kulik, M.M. Savitsky

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
A method is suggested for tensile testing of flat specimens of butt joints with decreasing load. Peculiarities of delayed fracture of the joints, depending on the thickness of the steel welded, as well as welding parameters and technique, are considered. It is established that delayed fracture of homogeneous or close to homogeneous butt joints occurs primarily in the weld. The possibility is shown of determining the time of microplastic deformation, stress and delayed fracture energy, as well as time and frequency of microcrack initiation. The procedure can be applied for development of a welding technology
Keywords: arc welding, high-strength steels, butt joints, weld, thermal cycle of welding, delayed fracture, microplastic deformation, stresses, crack resistance, evaluation procedure

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Suggested Citation

V.M. Kulik, M.M. Savitsky (2007) New procedure for evaluation of cold cracking resistance of hardening steel welded joints. The Paton Welding J., 01, 8-13.

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