Railway Castings, as important load-bearing factors in railway systems, have their interior microstructure instantly determining the overall performance and repair lifetime. Metallographic Examination, by revealing the microstructure qualities of supplies, presents a direct foundation for the quality assessment of keep track of castings. 1.Technological methods of metallographic Inves... https://vherso.com/post/568829_with-the-development-of-big-data-the-internet-of-things-and-artificial-intellige.html