Railway Castings, as key load-bearing parts in railway programs, have their inner microstructure straight identifying the efficiency and repair daily life. Metallographic Evaluation, by revealing the microstructure properties of elements, gives a immediate basis for the quality evaluation of monitor castings. one.Technical methods of metallographic Assessment 1.one Metallographic anal... https://www.reddit.com/r/TrainPorn/comments/1o2ps3u/rail_shoulders/