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Metallographic Microscope in Dandong Foundry


Metallographic Microscope is used to inspect the micro structure for the gray iron and ductile iron castings, such as percent of spheroidization (nodulizing grade), which is the most important factor affecting the mechanical properties to ductile iron.

The above is a metallographic photo for ductile iron GGG50 after heat treatment. Normally, ductile iron do not need further heat treatment, however, in the cold winter, or for shell molding process, there will be some free carbide, which is very harmful to ductile iron, will cause cast iron become fragile. The proper heat treatment could elimiate the free carbide.

Our foundry has three microscopes, so inspect miscro structure for all cast iron production process.




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