Metallographic analysis is one of the important means of metal material experimental research. Quantitative metallographic analysis is used to determine the three-dimensional morphology of the alloy microstructure by measuring and calculating the microstructure of the grinding surface or thin film of the two-dimensional metallographic sample, so as to establish the quantitative relationship among the composition, microstructure and properties of the alloy. The application of image processing system in metallographic analysis has the advantages of high precision and high speed, and can greatly improve the working efficiency. The report data mainly come from the national bureau of statistics, the general administration of customs, the development and research center of the state council, the basic information of relevant domestic and foreign journals, and the scientific research units of metallographic image analyzer, etc.

Metallographic analysis:

· microstructure

· Grain size

· The decarburization layer

· Carburizing layer

· coating thickness

· hardened layer thickness

· non-metallic inclusion

· intercrystalline corrosion

· ferrite content

· macro detection