Railway Castings, as critical load-bearing elements in railway methods, have their internal microstructure immediately deciding the functionality and service everyday living. Metallographic Investigation, by revealing the microstructure attributes of components, provides a direct foundation for the quality evaluation of track castings. 1.Technological methods of metallographic Investi... https://sites.google.com/view/railshoulders/%E9%A6%96%E9%A1%B5