Investigation of erosion properties of directionally solidified Fe-B alloy in various velocities liquid zinc

摘要

The erosion behavior of a directionally solidified Fe-B alloy containing 3.5 wt% B in the different velocities of flowing liquid zinc is investigated by X-ray diffraction and scanning electron microscopy to clarify the effect of interaction between Fe_2B and the erosion products on erosion performance using a rotating-disk technique. The results indicate that the Fe-B alloy erodes at a low and steady rate in flowing liquid zinc. The microstructure of erosion layers of the directionally solidified Fe-B alloy depends on the orientation relation between the growth direction of Fe_2B phase and the erosion surface. When the growth direction of Fe_2B is perpendicular to the erosion surface, the Fe_2B and the erosion compounds form a compact and stable combining layer that effectively inhibits the erosion of flowing liquid zinc and further improves the erosion resistance of Fe-B alloy.