Railway Castings, as key load-bearing factors in railway units, have their interior microstructure specifically determining the performance and repair existence. Metallographic Evaluation, by revealing the microstructure characteristics of products, supplies a direct basis for the standard assessment of keep track of castings. 1.Technological methods of metallographic Investigation 1.... https://www.reddit.com/r/TrainPorn/comments/1o2ps3u/rail_shoulders/