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| Naji, M. |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Azevedo, Nuno Monteiro |
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Lacerda, Pedro
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Publications (5/5 displayed)
- 2022A study on a cast steel reinforced with WC-metal matrix compositecitations
- 2021Production and characterization of austenitic stainless steel cast parts reinforced with WC particles fabricated by ex situ techniquecitations
- 2020Preparation and microstructural characterization of a high-Cr white cast iron reinforced with WC particlescitations
- 2020Microstructural characterization of TiC–White cast-iron composites fabricated by In Situ techniquecitations
- 2017The search for extreme asteroids in the Pan-STARRS 1 Survey
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article
A study on a cast steel reinforced with WC-metal matrix composite
Abstract
This study seeks to investigate the local reinforcement of low carbon cast steel specimens with WC–metal matrix composites (WC–MMCs), to obtain a new material effective in competing with hard alloy steels. For this purpose, a powder compact of tungsten carbide (WC) and iron (Fe) was prepared and placed in the mold cavity before casting. The reactions that occurred with the molten steel led to the formation of the WC–MMC and, consequently, to the local reinforcement of the steel. The microstructure of the WC–MMC reinforcement was characterized by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and electron backscatter diffraction (EBSD). The results showed a microstructural variation throughout the depth of the reinforcement. In the surface region, most of the original WC particles retain their polygonal morphology, but towards the base metal, the dissolution of the WC particles increased with the formation of (Fe,W) 6 C carbides. Closer to the base metal, dendritic eutectic carbides of (Fe,W) 6 C and fine (Fe,W) 23 C 6 precipitates in a matrix of martensite were formed. The mechanical properties of the reinforcement were evaluated by hardness and ball-cratering abrasion tests. The results revealed a significant increase in hardness, being three times harder than the base metal, and a decrease of 39% in the wear rate. ; This research was funded by national funds through FCT - Fundação para a Ciência e a Tecnologia, I.P., under project references UIDB/50022/2020 and UIDP/50022/2020 and by FEDER through program P2020|Norte2020, Programas doutorais (NORTE-08-5369-FSE-000051).