Abstract
The results of the investigation of the influence of the flux composition on the physical properties of the fluxes used in submerged arc surfacing with strip electrode are presented. During the process of submerged arc surfacing with strip electrode the operating conditions and the shape of the bead depend on the physical properties of the molten slag. The value of bypass current and welding characteristics in the process of submerged arc surfacing with strip electrode using a composition of slag system MgO CaF 2 Al 2 O 3 SiO 2 are connected with the content of magnesium oxide plus aluminum oxide as well as the ratio of the content of magnesium oxide to aluminum oxide. The experimental data of the investigation show that to meet the requirements for the melting temperature, the melting rate, and viscosity of the molten slag the sum of content of magnesium and aluminum oxides should be equal to more than 50 %. Besides, the ratio of the content of magnesium oxide to aluminum oxide should be equal to 1.0. The developed ceramic flux composition with melting point above 1500С, low melting rate, and increasing viscosity of the molten slag all improve the stability of surfacing process and the quality of the weld shape. In addition it allows increasing the alloying element content of the ceramic flux used in submerged arc surfacing with strip electrode
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