Nanostructure formation on the surface of railway tracks
Nanostructure formation on the surface of railway tracks
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DOI：
10.1016/s0921-5093(00)01947-x
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发表时间：
2001-05
期刊：
影响因子：
6.4
通讯作者：
W. Lojkowski;M. Djahanbakhsh;G. Bürkle;S. Gierlotka;W. Zieliński;H. Fecht
中科院分区：
文献类型：
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作者：
W. Lojkowski;M. Djahanbakhsh;G. Bürkle;S. Gierlotka;W. Zieliński;H. Fecht
研究了钢轨表层的微观结构。结果表明，在开采过程中，钢轨表层转变为纳米晶Fe-C合金。对纳米结构的形成机理进行了探讨。结果表明，珠光体向纳米Fe-C合金层的转变是由于轮轨接触区塑性变形较大所致。轮轨接触温度低于230℃时，表面组织发生转变，其机制与机械合金化过程相似。
The microstructure of the surface layer of railway tracks is investigated. It is shown that the surface layer of the rail transforms during exploitation into a nanocrystalline Fe–C alloy. The mechanism of the nanostructure formation is discussed. It is shown that the transformation of pearlite to the nanostructured Fe–C alloy layer is caused by the heavy plastic deformation at the wheel–rail contact zone. The transformation of the microstructure of the surface may take place at rail–wheel contact temperatures less than 230°C and its mechanism is similar to that taking place during mechanical alloying.