| Popis: |
In this work were analyzed factors that leads to wearing of equipment of production engineering, construction, oil and gas, woodworking, tillage industries. Was established that traditional hardfacing materials based on the Fe-Cr-C system are not effective for improvement of abrasion resistance of elements of equipment for production of ceramic building materials due to working conditions. The aim of this work was to increase a durability of that equipment by using of flux cored electrodes with reaction components that provide “in-situ” synthesis, which leads to fine-grained structure of refractory borides and carbides and their solid solutions with increased hardness. Powders of Ti, Mo, B4C and their combinations were used. Structure of the hardfacing coatings were investigated by method of metallography, scanning electron microscopy (SEM). Using of pure metal powders led to forming a fine-grained structure with refractory borides and carbides and their solid solutions. It was investigated that the offered material based on Fe-Ti-Mo-C-B system used for increasing the wear resistance of extruder-screw for production of ceramic building material can increase the TBO period in 2.2-2.4 times in comparison with serial hardfacing materials based on Fe-Cr-C system. |
