Experience in the use of technogenic materials for the production of fluxes used for forming rolls surfacing

Abstract

The article contains the results of studies on the feasibility of using slag from silicium manganese production and flux additives based on aluminum purification waste products in the manufacture of welding fluxes for surfacing forming rolls. Based on the conducted experimental studies, the regularities of the influence of fractional and component composition of welding fluxes made using the above-mentioned technogenic wastes on the mechanical properties and quality of the microstructure of the deposited metal layer were established. In particular, it is shown that the maximum impact strength is achieved at a specific fraction content less than 0.45 mm in the charge for welding flux production at a level of 15 to 30%. It was established that with the additional use of liquid glass as a binder component in the charge for the production of welding fluxes, the highest mechanical properties of the weld metal layer are achieved at a flow rate of liquid glass within 20-30% of the mass of the charge. It is shown that the increase in the proportion of the flux additive from 2% to 8% in the charge for the production of welding fluxes causes the increase in the impact strength of the weld metal layer by more than 2 times and leads to the decrease in contamination with nonmetallic inclusions. The technology of rolls surfacing using the developed new fluxes has undergone industrial testing and has been introduced into production.