Analysis of the Influence of non-Metallic Inclusions on the Wear Resistance of the Weld Metal

The paper presents investigation of methods of injecting of nanocomponents into the welding pool, that are adapted for surfacing processes. They differ by form and way of injecting. A mixture of nanopowder with flux, spray technology, a mixture with alcohol and a paraffin rod were tested during research. Silicon oxide nanopowder and carbon fiber have shown a positive effect on the durability. Positive changes in the structure of weld metal and microhardness increase were detected when using nanocomponents. To assess the role of non-metallic inclusions on the structure of the surface, welds were examined for their chemical composition, dimensions and density of precipitates in a metal matrix. Statistical analysis of non-metallic inclusions in the weld metal was done. It has shown that cumulant coefficients and probability density functions of diameters of equivalent circles of non- metallic inclusions are sensitive to various types of additives in steel.