Actual Problems in Machine Building 2015 No. 2

Актуальные проблемы в машиностроении. 2015. №2 Материаловедение в машиностроении ____________________________________________________________________ 353 STRUCTURAL FEATURES OF WEAR-RESISTANT PLASMA COATINGS AFTER HIGH FREQUENCY CURRENT ACTION Zverev E.A. , Ph.D. (Engineering), Associate Professor, e-mail: egor_z@ngs.ru Chesov Yu.S. , Ph.D. (Engineering), Associate Professor, e-mail: chesov@ngs.ru Vakhrushev N.V. , Ph.D. student, e-mail: vah_nikit@mail.ru Tregubchak P.V. , assistant, e-mail: ipv@mail.ru Zarubin D.Yu. , student, e-mail: dmitryzarubin@mail.ru Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract The research results of the induction heating effect on the structure of wear-resistant plasma coatings from the high-chromium powder material PG-S27 are presented in the article. The results of raster metallographic examinations of the surface of plasma coatings at the spraying stage and after an additional high energy action by high-frequency currents are shown. It is noted that the topography of the coating surface becomes more uniform after repeated high temperature heating, pores and the unmelted powder particles mostly disappear and the carbide component in the plasma coating structure is retained. It confirms that repeated heating modes are rational. Keywords wear resistance; plasma coatings; high-chromium cast iron; structure; raster microscopy; induction heating