Abstract
In the present study, a two-step surface treatment was employed to produce an iron-rich aluminide surface layer on 9Cr1Mo steel. In the first step, the steel specimen was immersed in a 1073 K (800 °C) aluminizing bath for 90 seconds to obtain an Al-rich iron aluminide/Al double layer. Then, the aluminum-rich layer and some portion of the substrate material underneath were melted using a pulsed Nd:YAG laser with different pulse energies in the range of 4 to 8 J. The surface and cross section of the alloyed layers were studied using optical microscopy, scanning electron microscopy, an electron microprobe, and X-ray diffraction analyses. The results showed that after laser remelting of the hot dipped aluminized steel at a pulse energy of 7 J, an integrated layer of FeAl replaced the primary layer.
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The authors would like to gratefully acknowledge Ryutaro Yamagata for his technical assistance.
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Manuscript submitted October 21, 2012.
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Emami, M., Shahverdi, H.R., Hayashi, S. et al. A Combined Hot Dip Aluminizing/Laser Alloying Treatment to Produce Iron-Rich Aluminides on Alloy Steel. Metall Mater Trans A 44, 3176–3184 (2013). https://doi.org/10.1007/s11661-013-1666-2
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DOI: https://doi.org/10.1007/s11661-013-1666-2