THE INFLUENCE OF FRICTIONAL THEATMENT ON THE MICROMECHANICAL PROPERTIES OF NiCrBSi COATING PRODUCED BY LASER CLADDING

  • Authors: Soboleva N.N.1, Makarov A.V.2, Malygina I.Y.3
  • Affiliations:
    1. Institute of Engineering Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg The First President of Russia B.N. Yeltsin Ural Federal University, Yekaterinburg
    2. M.N. Mikheev Institute of Metal Physics of Ural Branch of the Russian Academy of Sciences, Yekaterinburg Institute of Engineering Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg The First President of Russia B.N. Yeltsin Ural Federal University, Yekaterinburg
    3. Institute of Engineering Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg
  • Issue: No 4 (2017)
  • Pages: 135-140
  • Section: Technical Sciences
  • URL: https://vektornaukitech.ru/jour/article/view/200
  • DOI: https://doi.org/10.18323/2073-5073-2017-4-135-140
  • ID: 200

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Abstract

The NiCrBSi coatings are widely used in various industries, both when retailoring the worn parts, and when improving the surface quality of new products exposed to the high contact stresses, temperatures and corrosive environments under the operating conditions. It is possible to use the frictional treatment of such coatings as a finishing operation. It allows providing the additional increase in strength and tribological properties, the formation of favorable compressive stresses, and the low surface roughness as well. In this paper, to evaluate the mechanical characteristics of the PG-CP2 coating (0.48 % C; 14.8 % Cr; 2.6 % Fe; 2.9 % Si; 2.1 % B; the rest is Ni) with the frictionally treated surface layer, the authors used the microindentation allowing the recording of the indenter loading and unloading diagrams, and the measuring of microhardness at different loads (0.098–9.81 N) ensuring various depths of indenter penetration. The comparison of data of the PG-CP2 coating surface microhardness and microindentation in various states showed that the frictional treatment with the natural diamond indenter in argon, the dispersed boron nitride (DBN) indenter in air, and the hard alloy (BK8) indenter in argon at the load of 350 N promoted the increase in the micromechanical characteristics in comparison with the electropolished state. The most effective hardening of the NiCrBSi coating surface layer is achieved when treated with the dispersed boron nitride indenter in the air at the load of 350 N. The mechanical on-machine grinding provides the significantly lower levels of micromechanical characteristics than the frictional treatment under this mode. The microindentation results can be correlated with the development of various wear mechanisms during the abrasive action and sliding friction. 

About the authors

Natalya Nikolaevna Soboleva

Institute of Engineering Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg
The First President of Russia B.N. Yeltsin Ural Federal University, Yekaterinburg

Author for correspondence.
Email: natashasoboleva@list.ru

PhD (Engineering), researcher of Laboratory of Constructional Material Science

Russian Federation

Aleksey Viktorovich Makarov

M.N. Mikheev Institute of Metal Physics of Ural Branch of the Russian Academy of Sciences, Yekaterinburg
Institute of Engineering Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg
The First President of Russia B.N. Yeltsin Ural Federal University, Yekaterinburg

Email: av-mak@yandex.ru

Doctor of Sciences (Engineering), Head of Department of Materials Science and Laboratory of Mechanical Properties 

Russian Federation

Irina Yurievna Malygina

Institute of Engineering Science of Ural Branch of the Russian Academy of Sciences, Yekaterinburg

Email: malygina@imach.uran.ru

PhD (Engineering), senior researcher of Laboratory of Constructional Material Science

Russian Federation

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