Laser cladding of a featureless iron-based alloy

Laser cladding experiments with powder injection technique were carried out to create coatings of Fe–8.1Cr–6.4Mn–5.3Si–6.9Mo–3.6C alloy on AISI 1018 steel substrates using a diode laser. Analysis of the clad layers showed that an almost featureless structure was formed at different dilutions between...

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Bibliographic Details
Published in:Surface & coatings technology 2012-09, Vol.209, p.32-37
Main Authors: Aghasibeig, Maniya, Fredriksson, Hasse
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Epsilon phase
Exact sciences and technology
Featureless phase
Iron-based alloys
Laser cladding
Materials science
Metallic coatings
Metals. Metallurgy
Physics
Production techniques
Surface treatment
Surface treatments
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Summary:Laser cladding experiments with powder injection technique were carried out to create coatings of Fe–8.1Cr–6.4Mn–5.3Si–6.9Mo–3.6C alloy on AISI 1018 steel substrates using a diode laser. Analysis of the clad layers showed that an almost featureless structure was formed at different dilutions between 1% and 4%. The featureless phase with a high hardness of 1155HV was characterized as a metastable solid solution of ε phase. However, the featureless structure appeared to be very brittle with numerous cracks. After heat-treatment, it decomposed into a bainitic structure with a high hardness of 884HV. ► Laser cladding of a newly developed Fe-based alloy was examined. ► The coatings had an almost completely featureless structure. ► The featureless phase was identified as metastable ε phase. ► The featureless phase exhibited a high hardness of about 1155HV. ► Preheating the substrates could greatly reduce the number of the cracks.
ISSN:0257-8972
1879-3347
1879-3347
DOI:10.1016/j.surfcoat.2012.08.013