Formation of Cr sub 3 C sub 2 /Ni-Cr alloy layer by an electron beam cladding method and evaluation of the layer properties

The trend toward more efficient utilization of energy and resource, as well as the need for advanced functionality, has led to a growing demand for materials with high erosion and corrosion resistance. Chemical coating methods using heavy metals are no longer a viable choice because of global environmental concerns and the threat of environmental pollution. Thus, there is a pressing need for new surface modification technologies that can form surface layers with superior functional properties. The authors have been developing an electron beam cladding method employing a high energy density electron beam and a powder feeder. In this report, a hard surfacing layers with high corrosion and erosion resistance were successfully formed on mild steel employing the electron beam cladding method with Cr sub 3 C sub 2 /Ni-Cr mixed alloy powder, and their properties were examined.