Railway Castings, as important load-bearing components in railway methods, have their interior microstructure directly determining the overall performance and repair daily life. Metallographic Evaluation, by revealing the microstructure characteristics of products, supplies a immediate basis for the standard assessment of observe castings. 1.Complex ways of metallographic Examination ... https://www.dostally.com/post/344381_rail-grinding-this-art-carried-out-amid-sparks-flying-quietly-safeguards-the-hea.html