稀土在激光熔覆涂层中的分布和行为

Distribution and Behaviour of Rare Earth in Laser Coating

用激光快速熔凝法研究了加入钢表层稀土的行为和分布。结果表明，因用激光处理含稀土的涂层能够使较多的稀土偏聚到钢的表层；偏聚到钢表层的过饱和稀土除与氧、硫作用外，还可固溶于晶内、晶界或晶界附近，甚至能形成金属间化合物ＲＥ２Ｆｅ１７；

?The behaviour of RE added into steel surface by laser rapid solidification Processing(LRSP) and their effects on surface properties were studied. Experimental results show that RE can be added into steel surface layer by LRSP of REcontaining coating. The RE in the steel surface can react with oxygen and sulpher, dissolved in the grains or grain boundaries, and form intermetallic compounds RE2Fe17. The addition of RE followed by LRSP(RELRSP) has very strong effects on the properties of steel surface.