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- Title
THE RESEARCH ON SURFACE PROPERTIES OF WELDING SLAGS AND ELECTRODE COATINGS.
- Authors
Mikhaylitsyn, Sergey V.; Sheksheev, Maxim A.; Mazur, Igor P.; Platov, Sergey I.; Sychkov, Alexander B.
- Abstract
The article presents data on the study of surface properties of welding slag and electrode coatings by the method of a maximum pressure in the gas bubble. As a result of the studies undertaken for welding electrodes with different types of coatings of the surface and interfacial tension of the molten welding slag (σsl) and electrode coatings (σco) were defined. It was determined that the highest surface tension of the molten welding slag makes possible the downward welding, since the slag generated under the influence of surface forces is prevented from running and does not prevent the welding process. The minimum interfacial tension determines unimpeded formation of the weld, in particular, the penetration bead when welding the root layer. For based coated stick electrodes which provide a guaranteed penetration of a root layer and the stable formation of the back penetration bead during downward welding of the root layer, the most promising is to obtain a welding slag with a low content of F and high content of MnO, FeO and Fe2O3 with the partial substitution of K2O for Na2O.
- Subjects
ELECTRODE design &; construction; SURFACE coatings; INTERFACIAL tension; IRON oxides; SUBSTITUTION reactions
- Publication
Journal of Chemical Technology & Metallurgy, 2017, Vol 52, Issue 4, p724
- ISSN
1314-7471
- Publication type
Article