简介：ThesegregationandinteractionofREM,phosphorusandtinongrainboundariesofα-FewereinvestigatedbyAugerspectrometryandSEM.TheresultsshowthatREM,PandSntendtosegregateongrainboundariesofα-Fe.AddingREMintoFe-SnalloywithlowS,PcontentscouldsuppressthesegregationofSnongrainboundaries.ThesegregationofSnwoulddecreasewithincreasingofREM.InFe-Sn-PalloyPwouldsuppressthesegregationofSn.ThesegregationofPwouldbesuppressedbysegregationofREM.ThetrendofPsegre-gationdecreaseswithincreasingofREM.WithincreasingofREMthesegregationofSnatfirstisloweredbutthenfollowedwithanincreasing.AddingREMintoFe-SnandFe-Sn-Palloyscouldsuppressintercrystallinefractureofα-Featlowtemperatures.