Railway Castings, as important load-bearing components in railway methods, have their internal microstructure directly determining the efficiency and repair existence. Metallographic Evaluation, by revealing the microstructure qualities of supplies, presents a direct foundation for the quality evaluation of track castings. one.Technical methods of metallographic Assessment 1.one Metal... http://myworldgo.com/profile/okok0972/action_id/3396941/show_comments/1