| In this study, Al-Fe alloy layers were made by Al powder spray on the steel sheets heated at 700℃, 800℃, 900℃, 1000℃ and 1100℃ for 30minutes, respectively. Microstructure observations and phase analyses of these alloy layers were carried out by XRD and EPMA, and mechanical and chemical properties of these alloy layers were examined. The experimental results were as follows. For alloy layers formed at 700, 800 and 900℃, main phases were (FeAl₃) and (Fe₂Al_5) phases, hardness was very high (Hv=700∼800) and corrosion resistance was good, but wear resistance was bad. For alloy layers formed at 1000℃ and 1100℃, main phase was Fe₃Al phase, hardness was low (Hv=300∼400), but corrosion and wear resistance were good. It was concluded that the alloy layers formed at 1000℃ for 30minutes had excellent characteristics compared to the layers formed at the other temperatures. |
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