Railway Castings, as key load-bearing elements in railway systems, have their inside microstructure straight analyzing the functionality and service lifetime. Metallographic Examination, by revealing the microstructure qualities of supplies, presents a direct foundation for the quality evaluation of track castings. 1.Technological methods of metallographic Investigation 1.1 Metallogra... https://talkitter.com/post/456844_with-the-development-of-big-data-the-internet-of-things-and-artificial-intellige.html