Real resin sand special machine tool structure base body casting

Real resin sand special machine tool structure base body casting
, belongs to higher strength inoculated cast iron (also called modified cast iron), which is obtained by inoculating ordinary cast iron. Since an inoculant (or modifier) was added to the molten iron before production, the number of graphite nuclei increased during crystallization, the size of the graphite sheets became smaller, and they were more evenly distributed in the matrix. The microstructure is fine flake graphite distributed on a fine pearlite matrix. Cast iron modifiers or inoculants are generally small particles or powder of ferrosilicon alloy or calcium silicon alloy. They form solid small particles immediately after being added. The carbon in the cast iron uses these small particles as the core to form fine flake graphite.
After inoculation treatment, not only the strength of cast iron is greatly improved, but the plasticity and toughness are also improved. At the same time, due to the addition of inoculant, the sensitivity of cast iron to cooling can be significantly reduced, so that all parts can obtain a uniform structure. Therefore, incubated cast iron is often used to manufacture structural parts with high mechanical performance requirements and large changes in cross-sectional dimensions.