| Autor: |
Dinani, B. Ebrahimi, Sadeghzade, S., Salehikahrizsangi, P., Faradonbeh, Z. Zamani, Ashrafi, A., Salimijazi, H. R., Niroumand, B., Doostmohammadi, A. |
| Zdroj: |
Metallography, Microstructure, and Analysis; August 2024, Vol. 13 Issue: 4 p647-656, 10p |
| Abstrakt: |
Laser cladding is a facile and inexpensive method for coating a layer of duplex stainless steel on steel substrates. In this study, a thick coating (200 µm) of Fe42Cr20Mo16Ni12C10alloy powders was successfully bonded to a 316L stainless steel substrate through laser cladding. Various laser scanning speeds (4, 6, 8 mm/s) were employed to achieve the desired results. The coating consisted of ferrite and austenite with no undesired phase such as sigma (σ) or chi (χ). Notably, the sample synthesized at a laser scanning rate of 6 mm/s exhibited equal amounts of ferrite and austenite phases (approximately 50% ferrite–50% austenite) with the same weighting rate of elements in each phase. Additionally, this sample demonstrated the lowest porosity around 0.8%. As a result, the coating showed superior pitting corrosion resistance compared to others. This study holds potential for the future development of highly practical duplex stainless steel coatings with enhanced corrosion behavior. |
| Databáze: |
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