Heat treatment shows that the cast iron: iron heat treatment can change the matrix organization, can't change the morphology and distribution of the graphite and matrix was caused by the change of the change in mechanical properties.

The nature of the light method is to develop not destroyed appearance and it is a indirect method. Light-section microscope is a kind of special measurement to test the coarse degree.

Now with trimming press can automatic loading and unloading of castings, remove most of the burr, can further increase its function; Assemble into automatic milling, drilling, the kinetic energy of the inspection, measurement, etc.

These green sand casting parts are high quality and very cost effective. Green sand casting still remains one of the more popular methods for producing inexpensive, ductile iron repeatable castings with significant cast-in features.

Precision casting include this kind of forms as investment decision casting, ceramic mildew casting, everlasting mold casting, compression casting, evanescent mold casting, sand casting and resin-bonded sand casting.

The advantages of the induction furnace is: fast heating, higher thermal efficiency of the furnace, oxidation burning loss is lighter, less absorbing gas.