45钢稀土硼铝共渗的扫描电镜观察

SEM Observation of Steel 45 RE -boron -Aluminized

通过扫描电镜观察了４５钢稀土硼铝共渗的渗层形貌，并进行了铝和铈的面扫描分析以及硼、碳、铝、铁的线扫描分析．结果表明：铝存在于渗层的次表层中，稀土的加。增加了铝的渗入量并改变了铝的分布状况．由此认为，铝是先于硼化物覆盖表面之前渗入的，当硼化物覆盖表面后，铝则停止迁移而富集于次表层中．

The layers of steel 45 RE -boron-Aluminized were observed .by SEM, and the surface scanning of Al, Ce and the depth profiles of B, C, Al, Fe were analyzed. The results show that the permeating amount of Al that mainly exists in subsurface layers increases because of the adding of rare earth and the distribution of Al is changed as well. So Al atoms are permeated before Fe2B has covered the surface of specimen and beacuse Fe2B continously covering surface, Al atoms stop diffusing and gather at subsurface layers.