The Interaction of Rare Earths,Phosphorus and Tin on Grain Boundaries of α-Fe

摘要

The segregation and interaction of REM,phosphorus and tin on grain boundaries of α-Fe were investigatedby Auger spectrometry and SEM.The results show that REM,P and Sn tend to segregate on grain boundariesof α-Fe.Adding REM into Fe-Sn alloy with low S,P contents could suppress the segregation of Sn on grainboundaries.The segregation of Sn would decrease with increasing of REM.In Fe-Sn-P alloy P would suppressthe segregation of Sn.The segregation of P would be suppressed by segregation of REM.The trend of P segre-gation decreases with increasing of REM.With increasing of REM the segregation of Sn at first is lowered butthen followed with an increasing.Adding REM into Fe-Sn and Fe-Sn-P alloys could suppress intercrystallinefracture of α-Fe at low temperatures.