PSI - Issue 20

Borisova M.Z. et al. / Procedia Structural Integrity 20 (2019) 48–52 Borisova M.Z. et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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4. Conclusion In this study the arc-sprayed coatings with Al 2 O 3 additives proceeded by different spraying modes were investigated. Metallographic and micro-x-ray spectral analysis of the coatings showed that for arc metallization of refractory additives of a powder material are allocated in separate unmelted particles. The coatings are characterized by a heterogeneous microstructure, cross-sections of particles are predominantly of ribbon-like curved form. The specific structure of the coating is formed, which consists of separate layered splatters, spread and hardened on the substrate. Elements of the multiphase structure formed during fast-flowing high-temperature processes of electric arc metallization were revealed and identified. It is shown that there is a slight decrease in the content of corundum in the coating with increasing current strength during arc metallization of the powder wire. Acknowledgements This research has been supported by Ministry of Science and Education of Russian Federation (Project III.28.1.3. «The development of systemic -structural materials science and elaboration of the technologies for producing wear-resistant coatings and microheterogeneity high- performance materials» ). References Bolotina, N.P. et al. 1995. Poroshkovaya provoloka dlya polucheniya pokrytiy [Flux cored wire for coatings]. Patent RF, no. 2048273. Guo, Y., Koga, G.Y., Moreira Jorge A., Savoie, S., Schulz, R., Kiminami, C.S., Bolfarini, C., Botta, W.J., 2016. Microstructural investigation of FeCrNbB amorphous/nanocrystalline coating produced by HVOF. Materials & Design 111, 608-615. Li, R., Zhou, Z., He, D., Zhao, L., Song, X. 2014. Microstructure and high-temperature oxidation behavior of wire-arc sprayed Fe-based coatings. Surface and Coatings Technology 251, 186-190. Lin, J., Wang, Z., Lin, P., Cheng, J., Zhang, X., Hong, Sh. 2014. Microstructure and cavitation erosion behavior of FeNiCrBSiNbW coating prepared by twin wires arc spraying process. Surface and Coatings Technology 240, 432-436. Shapovalov, A.N., Kalugina, O.B., Dema, R.R., 2017. Investigation of the structure of wear resistant coatings obtained by plasma powder surfacing. MATEC Web of Conferences 129(02044), 1-6. Student, M.M., Pikh, V.S., 1994. Dependence of the level of residual stresses on the composition of coatings and conditions of electric arc metallization. Materials Science 29(5), 478-484. Vinokurov, G.G., Popov, O.N., Struchkov, N.F., 2009. Formation of the microgeometry of the wear surface of electrometallized coatings during sliding friction. Russian Metallurgy (Metally) 4, 365-370. Vinokurov, G.G., Popov, O.N., Struchkov, N.F., 2011. On the Distribution of Profile Coordinates of Equilibrium Friction Surface in Wear Resistant Powder Coatings, Journal of Friction and Wear, Volume 32(2), pp. 79-83. Yasir, M., Zhang, C., Wang, W., Xu, P., Liu, L, 2015. Wear behaviors of Fe-based amorphous composite coatings reinforced by Al 2 O 3 particles in air and in NaCl solution. Materials & Design 88, 207-213. Zhang, L., Su, S., Wang, J., Chen, S.J., 2019. Investigation of arc behaviour and metal transfer in cross arc welding. Journal of Manufacturing Processes 37, 124-129.