Effect of Nano-Y2O3 on the Microstructure and Properties of Fe-Cr-C-N-Al Surfacing Alloy

In this paper, Fe-Cr-C-N-Al-Y wear-resistant surfacing alloy was prepared by open-arc with self-shielded flux-cored wire. The wear properties of the were analyzed using an MLS-23 rubber wheel wet sand tester. phase composition and microstructure X-ray diffraction, scanning electron microscope, backscatter diffraction transmission microscope; strengthening mechanism discussed. results show that is composed M + γ-Fe M7C3 AlN. When content nano-Y2O3 0.456 wt.%, formability best, wetting angle smallest, which 50.8°; AlN precipitate most, grain smallest. At time, hardness value up to 62.3 HRC, 11.8% higher than unmodified alloy. minimum weight loss 0.125 g, resistance increased 41.86%. mainly a plastic deformation mechanism, material removal processes are microcutting furrow wear. This study provides theoretical guidance for refining primary carbides improving high chromium cast iron.