Study of high-temperature heating effect on transformation of structure and phase composition of coatings of Al-Fe system

Formation of Intermetallic Coating on 20880 Steel in the Liquid-Phase Inter-Reaction with Aluminum

“…The microhardness of the structural components of the heterogeneous structure ranges from 1 (for Al(Fe)) to 6-9 GPa (for FeAl3+Al(Fe)) which is significantly lower than the hardness of the FeAl3 intermetallic (11 GPa) [2].…”

“…Coating the surface of material is effective and economical way to enhance its properties, such as wear resistance, corrosion resistance and heat resistance [1][2][3][4][5][6]. Aluminizing is one of the most common methods for protecting the surface of steel parts from oxidation at high temperatures (700-900°C and above) and atmospheric corrosion [7][8][9][10][11][12][13].…”

“…There are several of the most common technologies: aluminizing in powder mixtures, aluminizing by spraying, aluminizing with subsequent annealing, aluminizing in vacuum and aluminizing by immersion [13][14][15][16][17][18]. A kind of aluminizing with subsequent annealing is the method involving the application of aluminum on the surface of steel by explosion welding and the heat treatment of the composition to form an aluminide coating [2].…”

“…It is known that a significant increase of the intensity of diffusion processes at the interlayer boundary of a laminated composite can be achieved by heat treatment in the presence of a liquid phase [2,19]. Since carbon significantly slows down the diffusion of aluminum and with a high carbon content in steel the aluminizing procedure becomes ineffective in this work 20880 steel (Armco iron) was chosen for the saturation with aluminum.…”

AlMg6 to Titanium and AlMg6 to Stainless Steel Weld Interface Properties after Explosive Welding

“…The welding of aluminum alloys to steel poses a number of significant problems. These problems are mainly caused by the formation of brittle Fe x Al y intermetallic compounds at the weld interface [6][7][8], the difference in the melting points of the two metals and their oxides, the difference in their physical properties, dissimilar thermal expansion, etc. Aluminum oxide (Al 2 O 3 ) is a highly adhesive and rapid-forming oxide that gives aluminum its excellent corrosion resistance.…”