Abstract
ABSTRACT Electroslag strip overlaying process with agglomerated flux using external magnetic field and without it is examined. Minimal strip size to use external magnetic field for improvement bead shaping quality is determined. The impact of external magnetic field’s parameters at bead shaping features is researched. Also as the optimal magnetic field’s parameters, the optimal mode parameters of the process (e.g. weld current, weld voltage, weld speed) are determined. Influence of displacement from zenith at bead shaping quality is examined. Proposed ‘slalom’ and ‘spiral’ realization of electroslag strip overlaying process provides incessancy of overlaying on pipe’s inner surface. The technology of electroslag strip homogeneous single-layer corrosion resistant overlaying with agglomerated flux on pipe’s inner surface with a diameter of 850 and 990 mm is developed. These pipes are applied for main circulation pipeline’s manufacturing of nuclear power plant type V-1000 and V-1200.
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