FORMATION OF FUNCTIONAL PLASMA SPRAYED COATINGS WITH COMPLEX OF IMPROVED PHYSICAL, MECHANICAL AND OPERATIONAL PROPERTIES

Authors

DOI:

https://doi.org/10.20535/1813-5420.1.2021.242179

Keywords:

plasma sprayed coatings, surface plastic deformation, hardness, wear resistance, bond strength

Abstract

The possibility of increasing the complex of physical, mechanical and operational properties of plasma sprayed coatings from powders of the PG-19M-01 and PRH18N9 grades due to the electric pulse effect on the heterophase high-temperature flow during spraying and next surface plastic deformation of the deposited coatings by shot blasting has been investigated. It is shown that shot blasting provides the formation of a hardening layer with a thickness of up to 180...200 μm, while the maximum level of microhardness is observed at a depth of about 60 μm. The microhardness of the coating from PG-19M-01 powder at the point of maximum hardening increases by 35%; steel coatings from PR-H18N9 powder – by 48% compared to the state after spraying. Experimental studies of the effect of this treatment on the bond strength and wear resistance of the obtained coatings have been carried out. It is shown that after shot-blasting the bond strength of the coatings decreases by 10...15%, and the wear resistance increases by 32...38%.

References

Y. Gao, Y. Zhao, D. Yang, J. Gao, “A novel plasma-sprayed nanostructured coating with agglomerated- unsintered feedstock”, Journal of Thermal Spray Technology, vol. 25, pp. 291-300, 2016. doi: 10.1007/s11666- 015-0340-1.

C. Qiu, Y. Chen, “Manufacturing process of nanostructured alumina coatings by suspension plasma spraying”, Journal of Thermal Spray Technology, vol. 18, pp. 272-283, 2009. doi: 10.1007/s11666-009-9295-4.

A. Lohia, G. Sivakumar, M. Ramakrishna, “Deposition of nanocomposite coatings employing a hybrid APS + SPPS technique”, Journal of Thermal Spray Technology, vol. 23, pp. 1054-1064, 2014. doi: 10.1007/s11666-014-0071-8.

M.O. Vasyliev, B. M. Mordiuk,. S. I. Sydorenko, “Syntez deformatsiinykh nanokompozytiv na poverkhni aliuminiiovoho splavu D16 za dopomohoiu ultrazvukovoho udarnoho obroblennia”, Metalofizyka ta novitni tekhnolohii, vol. 4, pp. 545-563. 2016. doi: 10.15407/mfint.38.04.0545.

A.Y. Ivannikov, V.I. Kalita, D.I.Komlev, “The effect of electromechanical treatment on structure and properties of plasma-sprayed Fe-30Cr coating”, Journal of Thermal Spray Technology, vol. 28, pp. 883-892, 2019. doi: 10.1007/s11666-019-00868-y.

S. V. Mal’tseva, I. P. Mel’nikova, A. V. Lyasnikova, A. M. Zaharevich, “Structure and properties of modified plasma-sprayed composite coatings on a titanium base”, Mechanics of Composite Materials, vol. 52, pp. 531-534, 2016. doi:10.1007/s11029-016-9603-2.

Y.S. Borisov, A.L. Borisova, M.V. Kolomytsev, “High-velocity air plasma spraying of (Ti, Cr)C–32 wt.% Ni clad powder”, Powder Metallurgy and Metal Ceramics, vol. 56, pp. 305-315, 2017. doi: 10.1007/s11106- 017-9898-0.

O.M. Dubovyi, O.V. Chechel, M.M. Bobrov, Yu. Ye. Nedelko, “Perspectives of improving physical and mechanical properties of thermal coatings by electropulse exposure”, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, vol. 1, pp. 82-87, 2017.

L. G. Odintsov, Uprochnenie i Otdelka Detaley Poverkhnostnym Plasticheskim Deformirovaniem: Spravochnik [Hardening and Conditioning of Parts by Surface Plastic Deformation: Handbook], Mashinostroenie, Moscow, Russia, 1987, p. 328.

G. M. Borodulin, E. I. Moshkevich, Nerzhaveyushchaya Stal [Stainless Steel], Metallurgiya, Moscow, Russia, 1973, p. 319.

M. Mellali, P. Fauchais, A. Grimaud, “Influence of substrate roughness and temperature on the adhesion/cohesion of alumina coatings”, Surface and Coatings Technology, vol. 81, pp. 275-286, 1996. doi: 10.1016/0257-8972(95)02540-5.

Published

2021-10-11

Issue

Section

TECHNOLOGIES AND EQUIPMENT IN ENERGY