Abstract
AbstractThis paper presents results of experiments performed to establish effect of controlling magnetic fields on refinement degree of structure of deposited metal and weld. Electric arc surfacing was performed on plates made from steel VMSt3sp without and with action of sign changing longitudinal magnetic field with frequency of 3 Hz. Analysis of microstructures of deposited metal showed that influence of controlling longitudinal magnetic field positively affects its structure. In addition, it also increases toughness of deposited metal. Experiments were carried out on welding butt joint of plates 4 mm thick made of steel 12H18N10T with Sw-06H19N9T wire 3 mm in diameter under influence of sign changing transverse magnetic field with frequency of 5 Hz. Analysis of microstructure of welds showed that effect of controlling transverse magnetic field leads to refinement of weld metal grain by almost twice that should lead to increase of weld metal yield strength and improve service characteristics of weld and welded joint.KeywordsElectric arc weldingElectric arc surfacingLongitudinal magnetic fieldTransverse magnetic fieldMagnetic field inductionWeldCrystallization of weld pool
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