Railway Castings, as vital load-bearing factors in railway units, have their inside microstructure specifically analyzing the effectiveness and service life. Metallographic Assessment, by revealing the microstructure attributes of components, provides a direct foundation for the quality evaluation of track castings. 1.Technological methods of metallographic Assessment 1.1 Metallograph... http://www.mysportsgo.com/profile/okok0972/action_id/1513138/show_comments/1