Open AccessSurface protective layers of iron aluminides developed on medium carbon steel by the hot-dip aluminizing (HDA) process
Author(s) -
Hawkar J. Muhammed,
Dániel Koncz-Horváth,
István B. Illés,
Tamás I. Törók
Publication year - 2021
Publication title -
multidiszciplináris tudományok
Language(s) - English
Resource type - Journals
eISSN - 2786-1465
pISSN - 2062-9737
DOI - 10.35925/j.multi.2021.5.7
Subject(s) - materials science , intermetallic , carbide , metallurgy , carbon fibers , aluminium , layer (electronics) , dissolution , carbon steel , surface layer , composite material , chemical engineering , corrosion , composite number , alloy , engineering
The investigation in this paper is based on the existence of carbon content and its role in the formation of Fe-Al intermetallic layer in unalloyed carbon steel C45 with a carbon content of 0.44 wt.%. Several sophisticated techniques such as PFIB SEM equipped with EDS and EBSD, GD-OES were employed for the in-depth surface analysis. The results of the metallographic examination reveal that the carbon would appear and could be well detected at the interface between the solidified aluminum and the solid iron-base steel substrate and got also incorporated in the top aluminum layer. Furthermore, due to the dissolution and outward diffusion of iron into the liquid aluminum melt during the HDA process, plus its involvement in the formation of the solid intermetallic surface layer, thus the carbon atoms gaining higher chemical affinity there will also be more likely to form carbide precipitates of different kinds like Fe3AlC and AlC inside these developing surface layers on the C45 type steel during the process of hot-dip aluminizing at 700 °C.