Railway Castings, as key load-bearing parts in railway programs, have their inner microstructure straight figuring out the overall performance and repair existence. Metallographic analysis, by revealing the microstructure properties of resources, offers a immediate basis for the quality evaluation of monitor castings. one.Technical methods of metallographic Assessment 1.one Metallogra... https://www.friend007.com/post/558581_rail-grinding-this-art-carried-out-amid-sparks-flying-quietly-safeguards-the-hea.html