Effect of electrolytic-plasma
treatment on physico-chemical state surface and mechanical properties of steam
turbine blades STEEL 20X13
M.K. Smislova, D.R. Tamindarov, A.B. Samarkina
The
paper studies the influence of electrolytic-plasma polishing blades of steel
20X13 on physico-chemical state of the surface. It is
known that the performance characteristics of blades pas rovyh
turbines, such as fatigue strength and corrosion resistance, depends on many
factors and are largely determined by physical and chemical state of the surface
and micro-geometry, formed on the finishing operations of manufacturing. It is
shown that in addition to reducing the surface roughness (up to grade 12), the
result of electrolytic-plasma polishing is-are: increasing the fatigue limit,
increasing the corrosion potential, increased
micro-hardness of the samples. The observed effects can be attributed to a
modification proceeding on the surface - the formation of a modified surface
layer with a high (compared to the base) chromium content..
Key words: finishing, electrolytic-plasma polishing,
mechanical properties.