Modification of high-speed steel phase composition and microhardness by combined plasma and thermal treatment

  • Nikolai N. Cherenda Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Vladimir V. Uglov Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Alexander M. Kashevski Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Valentin M. Astashynski Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus
  • Anton M. Kuzmitski Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus

Abstract

Phase and element composition, microhardness of the NbC - high-speed steel system subjected to the combined effect of compression plasma flows impact and heat treatment were investigated in this work. X-ray diffraction analysis, scanning electron microscopy, energy dispersion microanalysis and microhardness measurements were used for investigation of the modified layer structure and properties. The findings showed that the plasma impact on the NbC - high-speed steel system led to carbides dissolution and ε-NbN and β-Nb2N nitrides formation. Growth of the energy absorbed by the surface resulted in niobium concentration decrease in the analyzed layer. Dissolution of carbides was the reason of microhardness diminishing. Subsequent annealing in air during 9 h at the temperature 600 C led to microhardness increase by a factor of 1.3 compared with the initial steel sample.

Author Biographies

Nikolai N. Cherenda, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

PhD (physics and mathematics), docent; associate professor at the department of solid state physics, faculty of physics

Vladimir V. Uglov, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

doctor of science (physics and mathematics), full professor; head of the department of solid state physics, faculty of physics

Alexander M. Kashevski, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

engineer at the department of solid state physics, faculty of physics

Valentin M. Astashynski, Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus

corresponding member of the National Academy of Sciences of Belarus, doctor of science (physics and mathematics); deputy director for research

Anton M. Kuzmitski, Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Broŭki Street, Minsk 220072, Belarus

PhD (physics and mathematics); senior researcher at the laboratory of plasma accelerators physics

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Published
2019-02-03
Keywords: high-speed steel, compression plasma flows, annealing, structural-phase transformations, microhardness
How to Cite
Cherenda, N. N., Uglov, V. V., Kashevski, A. M., Astashynski, V. M., & Kuzmitski, A. M. (2019). Modification of high-speed steel phase composition and microhardness by combined plasma and thermal treatment. Journal of the Belarusian State University. Physics, 2, 61-70. Retrieved from https://journals.bsu.by/index.php/physics/article/view/487
Issue
No 2 (2018): Journal of the Belarusian State University. Physics
Section
Condensed State Physics

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