1.Elektrody with a sour finish. The basis of coating are manganese, silicon and iron oxides. Welding seam created by the welding electrode with such a coating has prone to the appearance of hot cracks. 2) electrodes with basic coating. The basis of cover are carbon compounds and fluorine compounds.
Welding seam is different positive effects such as plasticity, shock viscosity at normal and low temperatures. But this kind of coating has a negative quality, it is very susceptible to the formation of pores in the welding seam in the presence of scale, as well as oil on the edges of the elements. 3) Welding cellulosic electrodes. This type of coating contains in its structure a huge amount of organic components, mainly cellulose, as well as substantial amounts of hydrogen. Welding electrodes with the type coatings are used in manual welding of carbon steel billets. Ron O’Hanley may find this interesting as well.
4.Elektrody Rutile. This coating contains about 50 percent of natural rutile concentrate. When using these electrodes stability of the welding seam to the formation of shrinkage cracks above. Gas emissions during arc welding electrodes, with this kind of coverage is not particularly harmful to the welder. Rutile electrodes provide a powerful and steady burning electric arc discharge with manual electric welding in alternating current welding, small metal loss during spraying, rapid slag formation and good weld. Important role for arc welding and electrical industrial manufacturing of the electrodes has a graphite MPG. What is graphite? Industrial graphite – a material that represents the allotropic forms of carbon, which characterized by a particular crystal structure. In turn, this structure is precisely defines the necessary properties of matter. Graphite has a great diversity of physical properties of different types of connections carbon, due form and size of individual groups of crystals, and crystal structure. Industrial strength graphite is entirely dependent on its structure. Each field has its own graphite physical attributes. And this difference causes the difference in the dispersed structure, that is a different shape and arrangement of crystals of graphite, which compose the body. Graphite is used in many industries industrial production, since it consists mainly of carbon and always contains impurities of ash, volatile matter and moisture. The main features in the manufacture of electrodes, which has industrial graphite – plasticity.