УДОСКОНАЛЕННЯ ЕЛЕКТРОШЛАКОВОГО НАПЛАВЛЕННЯ ХРОМИСТИХ ЧАВУНІВ

Abstract

The main disadvantages of the existing methods of improving the strength of coatings, including the use of electroslag surfacing, on existing equipment structures to implement this process are considered. The task is to significantly improve the process of elec-troslag surfacing to ensure the desired operational strength of the coating and thus ensure the absence of cracks in the metal.It is shown that electroslag surfacing of chromium cast irons allowsto significantly improve their mechanical properties, in particular strength and to obtain defect-free high-quality welded metal for operational requirements. The use of current-carrying crystallizer expands the possibilities of use in the surfacing of different types of surfacing materials and regulating the structure and properties of the weld metal. The industrial experience of electroslag surfacing in the current-carrying crys-tallizer of rolled rolls with the use of chromium cast iron in the form of fractions and liquid additives, including chromium cast iron, is presented. A new direction in the development of surfacing works is shown -obtaining flat bimetallic blanks designed to strengthen fast-wearing surfaces.It is emphasized that a significant advantage of the current-carrying mold is its sectional design.Various schemes of realization of electroshack surfacing process both two-section and three-section with their features and definition with definition of the basic advantages and lacks are presented.This technology is quite promising and effective and can be proposed for wider implementation, due to the fact that there are relatively simple ways to implement surfacing.