| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 732227 | Optics & Laser Technology | 2015 | 7 Pages |
•Fe–Ti–V–Cr–C–CeO2 cladding layer without defects such as cracks and pores.•The phases of the cladding layer were α-Fe, γ-Fe, TiC, VC and TiVC2.•Microstructures of the cladding layer were lath martensite and retained austenite.•The carbide was a complex composed of nano TiC, VC and TiVC2.•The cladding layer possessed good wear and corrosion resistance.
In situ TiC–VC reinforced Fe-based cladding layer was obtained on low carbon steel surface by laser cladding with Fe–Ti–V–Cr–C–CeO2 alloy powder. The microstructure, phases and properties of the cladding layer were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), transmission electron microscopy (TEM), potentio-dynamic polarization and electro-chemical impedance spectroscopy (EIS). Results showed Fe–Ti–V–Cr–C–CeO2 alloy powder formed a good cladding layer without defects such as cracks and pores. The phases of the cladding layer were α-Fe, γ-Fe, TiC, VC and TiVC2. The microstructures of the cladding layer matrix were lath martensite and retained austenite. The carbides were polygonal blocks with a size of 0.5–2 μm and distributed uniformly in the cladding layer. High resolution transmission electron microscopy showed the carbide was a complex matter composed of nano TiC, VC and TiVC2. The cladding layer with a hardness of 1030 HV0.2 possessed good wear and corrosion resistance, which was about 16.85 and 9.06 times than that of the substrate respectively.
