Abstract
Abstract A new method of surface treatment, micro-beam plasma arc melting/remelting, is proposed, and is applied to Fe–C–Cr–Si–B overlay in the paper. The surface of overlay was remelted by multi-pass scanning of micro-beam plasma arc and self-quenched by the underlying substrate. With this technique a microcrack-free remelting layer was produced for the iron-base overlay despite that it contained great amounts of carbon (4.2 wt%) and chromium (24.66 wt%), and even amorphous phase was found through transmission electron microscopy (TEM) on the top surface of remelting layer. The experimental results show that the micro-beam plasma arc melting/remelting is a unique technique of surface treatment with a significant application potential.
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