EXPLOSIVE WELDING OF LOW-DUCTILITY STEELS
B. S. Zlobin, V. V. Kiselev, A. A. Shtertser, I. S. Batraev
Lavrentyev Institute of Hydrodynamics SB RAS, Novosibirsk, Russia
Keywords: explosive welding, low-ductility material, wave-free joint, joint with interlayer, detonation spraying, characteristic length scale
Abstract
Two methods for obtaining crack-free joints by explosive welding of low-ductility 30KhGSA steel with varying hardness have been experimentally investigated: 1. the use of welding regimes that produce a flat, non-wavy interface zone; 2. the application of a ductile interlayer, which allows the use of welding parameters corresponding to the mechanical properties of the interlayer material. A characteristic length scale was constructed to distinguish flow regimes of the material with varying deformation intensities, enabling estimation of the thicknesses of the plastic strain localization band and the region of intense plastic deformation. It is shown that the minimum interlayer thickness that avoids fragmentation during joint plastic deformation is determined by the thickness of the strain localization band. For the first time, the feasibility of explosive welding using an interlayer produced by detonation spraying has been demonstrated.
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