Find in Library

The microstructure of iron-based alloy (FeCrC) cladding layers on the surface of Q235B mild steel was analyzed by means of SEM, XRD, and EPMA tests. The results indicated that structure morphology of FeCrC alloy cladding layers by TIG welding is mainly hexagonal and elongated in shape. These structures were composed of some hard phases, such as Cr23 C6, Cr3 C2, and Cr7 C3. When element B was added, the structure morphology of iron-based alloy cladding layers could be changed into an irregular clumpy and cracking shape, which appears as a Fe23(C, B)6 hard phase. When element V was added, the surface morphology was changed into a small clumpy shape, which was composed of (Fe, Cr) C and (Fe, Cr, V) C phase.