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Formation of iron aluminide coatings on plain carbon steel by TIG process

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Abstract

A tungsten inert gas (TIG) welding process was utilized successfully to produce a dense and hard iron aluminide coating on an aluminized plain carbon steel substrate. The aluminized surface of the steel sheets was melted using different currents in the range of 30 to 50 A. The surface and cross section of the alloyed layers were studied using optical microscopy, scanning electron microscopy, X-ray diffraction and a nano-hardness test. The results showed that the volume of the pool formed during the surface melting had a critical influence on the phases formed during the process. Forty amperes was found to be the optimum TIG current, at which a Fe-rich aluminide consisting mainly of Fe3Al formed on the steel substrate.

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Correspondence to Peiman Omranian Mohammadi.

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Omranian Mohammadi, P., Raiszadeh, R. & Shahverdi, H. Formation of iron aluminide coatings on plain carbon steel by TIG process. Int J Adv Manuf Technol 96, 1655–1663 (2018). https://doi.org/10.1007/s00170-017-0797-9

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  • DOI: https://doi.org/10.1007/s00170-017-0797-9

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