Structure of the Steel Surface-Alloyed with Titanium, Vanadium and Carbon in the Process of Powder Welding by a High-Energy Electron Beam

Abstract

Structural investigations of steel surface layers alloyed with vanadium, titanium and graphite were carried out using optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction analysis methods. Coatings were obtained by high-energy electron beam treatment. The titanium – vanadium ratio in initial powder mixtures was as 2:1, 1:1 and 1:2. TiC, a-Fe (ferrite), eutectic consisted of VC and a-Fe were the main structural components of the coating: With an increase of vanadium content shapeless TiC particles turned into dendritic; tertiary dendritic arms consisted of VC. In addition, it also resulted in an increase of carbide particle sizes. The volume fraction of strengthening particles in all coatings was approximately identical (18 %).

Corrosion Resistance of Medical Stainless Steel Obtained by Non-Vacuum Electron Beam Cladding

“…The parameters of the electron beam were as follows: the energy of the generated electron beam -1.4 MeV, velocity of the longitudinal movement of the sample -10 mm/s, the frequency and the amplitude of the transversal movement was 50 Hz and 25 mm. A detailed description of the preparation of the electron beam cladded samples is given in [14].…”