Railway Castings, as important load-bearing factors in railway units, have their inside microstructure specifically pinpointing the general performance and repair lifestyle. Metallographic analysis, by revealing the microstructure properties of resources, offers a immediate basis for the quality evaluation of track castings. one.Technical methods of metallographic analysis 1.one Metal... https://www.friend007.com/post/558827_this-is-the-periodic-wear-on-the-top-surface-of-the-rail-resembling-waves-when-t.html