Railway Castings, as key load-bearing factors in railway units, have their inside microstructure right deciding the functionality and service everyday living. Metallographic Investigation, by revealing the microstructure attributes of supplies, presents a direct foundation for the quality assessment of track castings. 1.Technological methods of metallographic Investigation 1.1 Metallo... https://expressafrica.net/post/400448_this-is-the-periodic-wear-on-the-top-surface-of-the-rail-resembling-waves-when-t.html