<正> 稀土元素作为合金化元素或变质元素,通常通过熔炼或铸造时加入钢或合金中,而用扩渗的方法在钢和合金表面渗入稀土元素的研究则不多。近年来,我们用化学法、自配渗剂,在气相条件下对20钢、纯Fe表面进行扩渗稀土元素的研究工作。经离子探针、扫描电镜能谱分析、X射线荧光分析等测试,均证实了在20钢和纯Fe表面渗入了微量的Ce,La等稀土元素,这些元素优先沿晶界扩散,并富集于晶界。
An attempt was made by chemical process to produce the RE coating by solid-gas interfacial diffusion-infiltration on steel 20 and Armco iron. The chemical composition of coating and the distribution of Ce and La along the depth beneath the surface of the steel specimens have been analyzed by ion-probe, SEM energy spectrum and fluorescent X-ray. It is shown that RE is remarkably influenced upon the carbonitriding process.
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