INTERPHASE TRANSFORMATIONS AT THE Fe – C ALLOY — Fe – Ni – Cr – Cu – Si – B – C ALLOY INTERFACE
Kapsalamova F.R. Krasikov S.A. Zhilina E.M. Berdikulova F.A.
2023Ore and Metals Publishing house
Tsvetnye Metally
2023#2023Issue 892 - 96 pp.
This paper describes a physico-chemical analysis of phase transformations at the Fe – C alloy — Fe – Ni – Cr – Cu – Si – B – C alloy interface, which is of interest in term of a promising metallothermic process that enables to obtain wear-resistant ultradispersed coatings for strengthening and restoring wornout parts of equipment. A Fe – Ni – Cr – Cu – Si – B – C powder, obtained by mechanochemical alloying, was gas-flame sprayed on an iron-carbon substrate. The aim of this study was to understand the physical and chemical transformations that occur when forming a wear-resistant coating aimed at strengthening and restoring worn-out parts of equipment. A propane-oxygen torch was used to perform gas-flame surfacing of a sample steel grade 45 substrate. An X-ray phase analysis was carried out, and images were produced on a scanning electron microscope when examining the physico-chemical properties of the Fe – C alloy — Fe – Ni – Cr – Cu – Si – B – C alloy interface. The results show that the Fe – C alloy — Fe – Ni – Cr – Cu – Si – B – C alloy interface consists of multiple phases, including intermediate phases, intermetallic compounds (CrNi3, Fe10.8Ni, etc.), carbides (Fe3C, (Cr, Fe)23C6, etc.), borides (Ni2B, Cr5B3, etc.), silicides (FeSi2, Cr5Si3, etc.). Such phase formation during gas-flame surfacing can be primarily attributed to complex processes of chemical interaction, diffusion and structure formation that occur due to temperature impact and are accompanied by an exothermic effect. The SEM images illustrate a non-uniform distribution of alloying elements between ultradispersed phases. This research was carried out under a governmental assignment by the Institute of Metallurgy at the Ural Branch of the Russian Academy of Sciences; Subject Registration No.: 122020100404-2.
adhesion , gas-flame surfacing , interfaces , mechanochemical alloying , phase transformations , surfacing powder , ultradispersed materials
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Department for Coordination of Science and Technology Projects and Programmes, National Center on complex processing of mineral raw materials of the Republic of Kazakhstan, Almaty, Kazakhstan
Institute of Metallurgy at the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russian Federation
Department of Chemistry, Ural State Mining University, Yekaterinburg, Russian Federation
Department for Coordination of Science and Technology Projects and Programmes
Institute of Metallurgy at the Ural Branch of the Russian Academy of Sciences
Department of Chemistry
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