Railway Castings, as key load-bearing components in railway methods, have their internal microstructure instantly pinpointing the general performance and service lifestyle. Metallographic Assessment, by revealing the microstructure features of resources, offers a immediate foundation for the quality evaluation of track castings. one.Technical methods of metallographic Assessment 1.1 M... https://www.reddit.com/r/TrainPorn/comments/1o2pron/rail_jointbar/