Generation and study of new electrode materials with self-fluxing additives to improve the efficiency of mechanical electrospark alloying

Considerations for the Selection of Materials for Electrical Spark and Gas Flame Spraying Deposition on Structural Steels

“…Diffusion and chemical interaction between the materials of the anode, the cathode and the surrounding medium accurate, and fixed high-temperature states, extremely unbalanced phases, and structures that sharply change the physico-chemical properties of the surface layer are obtained. A coating with a new relief and structure with different from the initial state surface properties is formed which are controlled over a wide range by changing the parameters of the spark discharge and the composition of the electrode material [6][7][8][13][14][15][16][17].…”

“…Further, they promote wetting of the substrate by reducing Ni, Co, Fe and Cr oxides, controlling surface tension and fluidity of the melt .The low melting point of NiCrBSi alloys as well as the fluxing effect of the Si and B allows these materials to be deposited by flame spray followed by fusing and welding the powders. An increase in the amount of chromium, boron and carbon increases the amount of solid carbides and borides, respectively [15,[35][36][37][38][39][40].…”

“…Еxperience has proved these alloys are a good choice for components in the presence of hard particles. Higher hardness and abrasion resistance is ensured with additions of hard-alloy compounds [15,22,2,[35][36][37][38][39][40].…”

“…The wrong choice of material for the application of wear-resistant coatings does not allow obtaining a satisfactory combination of the required level of performance characteristics of tribosystems with acceptable process ability, maintainability and cost-effectiveness of the processes of manufacturing and repairing parts. Numerous and various data are available in the literature on studying of the structure, composition and properties of wearresistant coatings applied by both methods [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] and many others. There the basic principles of the formation of the coating are given, and numerous data on their properties, the nature, and type of wear and tear in different conditions, and the results of their application taking into account the 1.3 to 10 and more times the increase in durability.…”

Features of Formation of Functional Coverings at Electrospark Modifying of Metal Materials

“…1). В результате этого в поверхностном слое активируются диффузионные процессы, которые приводят к образованию особого структурно-фазового состояния материала, связанного с повышением плотности дефектов кристаллического строения и увеличением концентрации химических элементов и новых фаз [5,7,8].…”