Railway Castings, as essential load-bearing elements in railway techniques, have their internal microstructure straight figuring out the functionality and service everyday living. Metallographic Investigation, by revealing the microstructure attributes of supplies, presents a direct foundation for the quality evaluation of track castings. 1.Technological methods of metallographic Inve... http://myworldgo.com/profile/okok0972/action_id/3399809/show_comments/1