Hardfacing is a widely diffused technique adopted to increase service life of parts for heavy-duty applications. Even thoughudhardfacing alloys feature optimized chemistry and microstructure for specific service conditions, dilution with substrate modifiesudthe resulting properties along a significant fraction of the deposit thickness. In particular, C and B diffusion to the substrate altersudhypereutectic alloys reducing the carbide-forming ability andmodifying the solidification sequence. In the present paper, the effectudof dilution on a hypereutectic Fe-C-B based alloy containing Cr and Mo was investigated. The effect of dilution on the referenceudalloy was studied by producing laboratory castings with an increased amount of Fe, up to 50 mass %. The obtained results wereudcompared with the dilution of the hardfacing alloy cast on steel substrates. The microstructural evolution was analyzed by XRDud(X-ray diffraction), differential scanning calorimetry (DSC), optical microscopy (OM), and scanning electron microscopy (SEM),udwhereas mechanical behaviour was evaluated by hardness measurements and wear resistance by pin-on-disc tests.
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