Formation of Fe-Al Intermetallic Compound Film on Carbon Steel by Shot Peening and Heat Treatment

Abstract:

The formation of an Fe-Al intermetallic compound film on carbon steel by shot lining and heat treatment was investigated. In the experiment, a centrifugal-type peening machine with an electrical heater was employed. The shot medium was high-carbon cast steel. The substrate was a commercial carbon steel, and the sheet was commercially available pure aluminum. The shot lining process of carbon steel with an aluminum sheet was carried out at 300 °C in air using a peening machine. Heat treatment was performed at diffusion temperatures from 600 to 1050 °C in vacuum. The lined substrates exhibited a harder layer of Al-rich intermetallics, such as Fe₂Al₅, in the diffusion temperature range of 650 to 900 °C. When the temperature of the lined substrates was more than 930 °C, the surface was covered with thicker and highly anticorrosive layers of Fe-rich intermetallics, such as FeAl and Fe₃Al. We found that the present method could be used for the formation of functional films on carbon steel.

• Periodical: Advanced Materials Research (Volume 409)
• Pages: 802-807
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.409.802
• Online since: November 2011
• Authors: Yasunori Harada, Yuji Miura, Katsuhiko Takahashi
• Keywords: Intermetallic Compound (IMC), Lining, Shot Peening, Surface Modification

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