Railway Castings, as vital load-bearing factors in railway units, have their inside microstructure straight deciding the functionality and service everyday living. Metallographic Investigation, by revealing the microstructure attributes of supplies, provides a direct foundation for the quality evaluation of track castings. one.Technical methods of metallographic Assessment 1.one Metal... https://www.reddit.com/r/TrainPorn/comments/1o2ps3u/rail_shoulders/