Розробка електродного покриття для електродугового різання

Abstract

The aim of the development is the creation of an electrode for arc cutting of metals and alloys, ensuring an increase in cutting performance and improving the quality of the metal in the cutting zone by changing the gas-slag electrode coating system.To optimize the gas-slag system of the electrode coating, copper oxide is additionally introduced into its composition containing marble, clay, mica, soda, potassium chromoxidation and hematite.The result of the development of a new coating composition is to ensure the high technological properties of special electrodes and to improve the quality of the metal in the cut zone.Copper oxide increases the amount of oxygen released in the metal melting zone, improves the performance of the cutting process.The technology of manufacturing electrodes with the developed composition of the coating does not differ from the standard used for similar electrodes.To check the technological properties and quality of the metal in the cutting zone, sharp low- carbon steel 20 cast iron of grade SC 21 and stainless steel 12X18H10T was carried out. The thickness of the samples was 10 mm. The introduction of the proposed composition of the electrode coating in production will have a significant economic effect compared with mechanical or oxygen cutting due to the high technological properties of the electrodes, which allow to perform cuts defects in seams and casting, removal of grating, the construction of the surface of parts, cutting metal struc­tures and the development of edges for welding parts.The proposed composition of the electrode coating with copper oxide ensured an increase in the efficiency of electric arc cutting.The quality of the metal in the cutting zone is high. The hardness of the metal on the cutting surface allows for the following machining of the edges under the welding operations.The results of testing the technological properties of the electrodes and the quality of the metal in the cut zone show that the cutting performance is improved by 30%.The quality of the metal in the cut zone is high, no cracks or other defects were detected.The hardness of the metal on the cut surface allows subsequent machining of the cut edges.