Structural-Phase State and Properties of Steel After Plasma-Electron Modification


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Abstract

The results of investigation of phase and elemental compositions, defect substructure states, mechanical and tribological properties of the modified surface of Steel Gr1 are presented. The process of modification consists in plasma spraying of a Ni–Cr–B–Si-based powder coating followed by its irradiation with a high-intensity pulsed electron beam. It is shown that the coating surface formed by plasma spraying contains micro- and macro-pores and is characterized by high relief. A subsequent processing of the modified surface with a highintensity pulsed electron beam of a submillisecond duration in the mode of surface layer melting is accompanied by smoothing of the coating surface, saturation of the surface layer crystal lattice with Ni, Cr, B and Si atoms, formation of submicron cells of dendritic recrystallization, precipitation of nanosized particles of the second phase, and formation of quench structure. When combined, these treatments result in the formation of a hardened layer up to 1500 μm in thickness, whose microhardness and wear resistance by 4.6–6.5 and 4 factors exceed the respective characteristics of the initial steel.

About the authors

Yu. F. Ivanov

Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences

Author for correspondence.
Email: yufi55@mail.ru
Russian Federation, Tomsk

A. I. Potekaev

National Research Tomsk State University; V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University

Email: yufi55@mail.ru
Russian Federation, Tomsk; Tomsk

A. A. Klopotov

V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University; Tomsk State Architecture and Building University

Email: yufi55@mail.ru
Russian Federation, Tomsk; Tomsk

Yu. A. Abzaev

Tomsk State Architecture and Building University

Email: yufi55@mail.ru
Russian Federation, Tomsk

M. P. Kalashnikov

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences

Email: yufi55@mail.ru
Russian Federation, Tomsk

A. V. Chumayevskii

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences

Email: yufi55@mail.ru
Russian Federation, Tomsk

G. G. Volokitin

Tomsk State Architecture and Building University

Email: yufi55@mail.ru
Russian Federation, Tomsk

E. A. Petrikova

Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences

Email: yufi55@mail.ru
Russian Federation, Tomsk

A. D. Teresov

Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences

Email: yufi55@mail.ru
Russian Federation, Tomsk

A. Yu. Shubin

V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State University

Email: yufi55@mail.ru
Russian Federation, Tomsk

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