Railway Castings, as important load-bearing components in railway units, have their internal microstructure instantly deciding the functionality and service daily life. Metallographic Assessment, by revealing the microstructure traits of components, gives a immediate basis for the standard assessment of observe castings. 1.Technological methods of metallographic Assessment 1.1 Metallo... https://www.speakfreelee.com/post/77977_rail-grinding-this-art-carried-out-amid-sparks-flying-quietly-safeguards-the-hea.html