Railway Castings, as essential load-bearing factors in railway devices, have their inner microstructure right deciding the functionality and service lifetime. Metallographic Examination, by revealing the microstructure traits of products, supplies a direct basis for the standard assessment of observe castings. 1.Complex ways of metallographic Examination one.1 Metallographic Examinati... https://www.geto.space/post/72795_in-curved-sections-or-areas-with-frequent-braking-the-surface-of-the-rail-will-d.html