| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention relates to structure of nonconsumable electrode for electroslag hard-facing or electroslag remelting. Hollow nonconsumable electrode is fixed in water-cooled electrode holder with channels for feeding of inert gas, located concentrically to axial channel of electrode holder and nonconsumable electrode. Electrode allows cyllindrical working section with ratio of its diametre D and diametre of axial channel d, selected from the range 2.0-2.3 and height, calculated depending on diametre D subject to coefficient, defining minimal and maximal permissible height of working section. Working section is implemented with cavity, expanding by the direction to the butt of submersed into slag electrode, for increasing of current density in slag ensured by decreasing of wall thickness. In axial channel of electrode it is installed dielectric cyllindrical pype. Cavity can be implemented in the form of hemisphere or in the form of cone. ^ EFFECT: device allows technological universality and provides increasing of heat consumption for heating of slag and melting of adding material ensured by reduction of contact area of working section of electrode with slag and increasing of current density. ^ 3 cl, 6 dwg, 1 tbl, 1 ex |
