Meaning:
Metals and their alloys are the most widely used materials in industry, agriculture, transportation, national defense and civil use. The composition of alloy, heat treatment process and cold working process directly affect the change of internal structure and microstructure of metal materials, thus changing the mechanical properties of parts. Therefore, it is an important means in industrial production to observe and inspect the internal structure of metals through metallographic analysis. Metallographic inspection is often used in raw material inspection, quality control in production process, product quality inspection, failure analysis and so on.