回顾了国家“八·五”项目的“稀土合金钢轨的研制”和“十·五”项目的稀土重轨钢机理研究.介绍了前者测量的研究钢性能、后者的内耗等研究和两者的相关观测结果,基于“十·五”项目的机理研究和相关的观测结果,从微观(原子)、介观(位错及其原子气团)、宏观(组织参量)等层次和上线轨承载时的应力分布方面,讨论和阐明了加稀土增强钢轨的使用硬化性,提高钢轨的耐磨和抗接触疲劳性能,以及稀土抑制钢轨的核伤、栓孔开裂和轨腰损伤等使用性能的机理.
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