Features of Diffusion Interaction in Steel-Aluminum Composite After Explosive Welding and Aluminizing by Melt Immersion

Aluminizing of the EP33 alloy by hot-dipping

“…The layer at the boundary with the substrate corresponds to the FeAl3 intermetallic compound with Cr and Ni dissolved in it (table 3, point 3). At the same time, the formation of the Fe2Al5 phase was not observed in the coating, the formation of which is typical during aluminizing of Fe-based alloys [7,18]. 2) made it possible to identify Al phase and Cr2Al13 and FeAl3 intermetallic phases, which confirms the conclusions made on the basis of EDS analysis.…”

“…The energy dispersive analysis results allowed us to confirm the statement that the surface is an aluminum matrix (table 3, point 1). The inclusions distributed in the aluminum matrix, forming an eutectic structure, presumably correspond to the Cr2Al13(Fe,Ni) intermetallic compound (table 3, point 2), the formation of which is typical during the aluminizing of Fe and Ni based alloys alloyed with Cr [7,11]. The layer at the boundary with the substrate corresponds to the FeAl3 intermetallic compound with Cr and Ni dissolved in it (table 3, point 3).…”

“…Currently, considerable attention is paid to the formation of special coatings on critical parts made of heat-resistant alloys that increase the resistance of the material to corrosion, abrasion, and mechanical damage [1][2][3][4]. For this purpose, a wide variety of approaches and methods are used, such as spraying, metallization, plasma coating, various diffusion methods, explosion welding, hot-dip aluminizing [4][5][6][7].…”

“…One of the most promising methods for protecting metals is the creation of intermetallic coatings on the surface of products [7][8][9][10]. Such coatings, with a high level of strength and thermal characteristics, are at the same time as close as possible in properties to the metal substrate on which they are formed.…”

“…The main component of such high-temperature corrosion-resistant coatings is aluminum. For the effective and cost-effective formation of aluminide coatings, the hot-dip aluminizing method followed by heat treatment, described in detail in [7,11,12], is often used.…”