Legirani praški za navarjanje z večžično elektrodo
Alloyed fluxes for surfacing with multiple - wire electrode

slovenian

1997

volume 31, issue 5

Narodna in univerzitetna knjižnica

Submerged arc surfacing with alloyed agglomerated fluxes permits unalloyed and low-alloy structural steels to be surfaced in one layer of high-alloyed claddings. Surfacing dilution produced by fusion of the parent metal, and burn-off of alloying elements are substituted by additional alloying by means of a welding flux, which is, in the case of the above-mentioned surfacing processes, the main carrier of alloying elements for surfacing alloying. With alloyed agglomerated fluxes, it is recommendable to surface with low current intensity which ensures a minimum fusion of the parent metal and a minimum burn-off of alloying elements. Such an adjustment of welding parameters (low current intensity per wire and comparatively high welding voltage) is characteristic for submerged arc welding with multiple - wire electrode. The above-mentioned process is, therefore, very suitable, in combination with high-alloyed agglomerated fluxes, for onelayer cladding of structural steels with high-alloyed claddings. The structure of surfacings is coarsegrained due to a large molten pool. It is recommended to improve surfacings by adding nodular powder to the filler material, i.e. alloyed surfacing flux.

22.07.2011