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Powder Metallurgy and Metal Ceramics

, Volume 58, Issue 5–6, pp 312–322 | Cite as

Structurization of Coatings in the Plasma Arc Spraying Process Using B4C + (Cr, Fe)7C3-Cored Wires

  • G. M. Grigorenko
  • L. I. Adeeva
  • A. Yu. TunikEmail author
  • V. N. Korzhik
  • L. K. Doroshenko
  • Ye. P. Titkov
  • A. A. Chaika
Article
  • 11 Downloads

The structure and phase composition acquired by coatings deposited in optimum mode by the plasma arc spraying process were examined. The spraying materials were wires with a steel sheath and nB4C + 100 – n(Cr, Fe)7C3 cores. The coatings have a ferrite matrix doped with Cr, B, and C and hardened with Fe3(B, C), Cr2B, FeCr, and boron carbide particles. When the (Cr, Fe)7C3 amount in the wire increases from 30 to 50 wt.%, the matrix phase (α-Fe-based solid solution) content decreases from 65.8 to 37.6 wt.% and the weight content of the hardening phases increases from 28.2 to 59.3%. These processes improve hardness of the coatings to 6.25 and 8.6 GPa, respectively. All coatings are characterized by a fine lamellar structure and high adhesion to the substrate. They exhibit high density and low porosity (<2.5%) and their hardness exceeds that of the wire steel sheath by 4.0 to 5.5 times. The plasma arc coatings can be used as wear-resistant materials for protection of chemical engineering equipment against abrasive wear, in the production of parts for pumps, compressors, and other machines, and for the recovery of worn parts.

Keywords

plasma arc spraying cored wire carbide reinforcement phase transformations structure precipitation hardening of coatings borides borocementite microhardness 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • G. M. Grigorenko
    • 1
  • L. I. Adeeva
    • 1
  • A. Yu. Tunik
    • 1
    Email author
  • V. N. Korzhik
    • 1
  • L. K. Doroshenko
    • 1
  • Ye. P. Titkov
    • 1
  • A. A. Chaika
    • 1
  1. 1.E.O. Paton Electric Welding InstituteNational Academy of Sciences of UkraineKyivUkraine

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