Determination of the peculiarities of obtaining coatings of different hardness on structural steel at diffusion metalization
| Autor: | Leila Aliieva, Mykhailo Pohorielov, Yurii Diachenko, Oleg Markov, Volodymyr Bondarenko, Serhii Zharikov, Natalia Hrudkina |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Carbon steel 020209 energy 0211 other engineering and technologies diffusion metallization Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology engineering.material wear resistance Indentation hardness Industrial and Manufacturing Engineering Chromium chemistry.chemical_compound Aluminium Management of Technology and Innovation Boride 021105 building & construction lcsh:Technology (General) 0202 electrical engineering electronic engineering information engineering lcsh:Industry Surface layer structure Electrical and Electronic Engineering Composite material Boron Applied Mathematics Mechanical Engineering boride phase Computer Science Applications chemical-thermal treatment chemistry Control and Systems Engineering engineering microhardness lcsh:T1-995 lcsh:HD2321-4730.9 Solid solution |
| Zdroj: | Eastern-European Journal of Enterprise Technologies, Vol 6, Iss 12 (102), Pp 14-21 (2019) |
| ISSN: | 1729-4061 1729-3774 |
| Popis: | The features of obtaining coatings on carbon steel, structural steel St3 are studied during diffusion metallization – simultaneous saturation of steel with boron, chromium and aluminum (boron chromium aluminizing), without the use of special heat treatment. The basic compositions of powder mixtures are established using the simplex lattice method, which make it possible to obtain boride structures of increased hardness, phases of a solid solution of boron, chromium and aluminum in Feα and the predicted depth of the surface layer on the surface of carbon steel. The characteristic features of the microhardness formation of the surface layer of coatings are established depending on the composition of the saturating mixture. An important factor is established for the effect of aluminum on the microhardness of the surface layer in multicomponent systems. Its presence contributes to the formation of solid solutions. New data are obtained on the formation of surface layers during steel saturation with boron, chromium and aluminum, and the conditions for obtaining layers of high hardness and high ductility are determined. The optimal areas for the formation of coatings of various structures and depths by the simplex planning method are found. As optimization factors, let’s use the relative planes occupied by borides and solid solution, as well as the depth of the surface layers. It is clearly shown how the structure of surface layers changes depending on the quantitative relations between the components of saturating mixtures. The graphical dependences of the boride phase, the phase of the solid solution and the depth of the layer, on the composition of the saturating mixture during diffusion metallization (boron chromium aluminizing) allow to improve the process in order to obtain coatings with increased wear resistance on the surface of carbon steel |
| Databáze: | OpenAIRE |
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