Ductile iron casting products

Nodular iron casting products are mainly called centrifugal nodular iron casting. It has the nature of iron and the performance of steel, strong extension, good sealing effect, simple installation, and is mainly used for water supply, gas and oil transportation in municipal and industrial enterprises. Is the integrity of water supply pipe business, with high cost performance. Compared with PE pipe, the installation time of nodular graphite pipe is simpler than that of PE pipe, the speed is suitable, and the internal and external bearing pressure is better after installation; From the perspective of airtightness and performance stability, the installation of nodular graphite tube has excellent airtightness, which can also be improved by a variety of performance stability means; From the hydraulic performance point of view, because the specification of nodular graphite pipe generally refers to the inner diameter, the specification of PE pipe generally refers to the outer diameter, because under the same specification conditions, the nodular graphite pipe can achieve large runoff; From the comprehensive installation and maintenance cost point of view, the nodular tube has excellent cost performance. The inner wall is sprayed with zinc, and the cement mortar is stable.
Ductile iron casting is a kind of cast iron, an alloy of iron, carbon and silicon. Graphite in nodular cast iron exists in the form of ball. Generally, the size of graphite is grade 6-7, and the nodularization grade of cast pipe is required to be Grade 1-3 in quality. Therefore, the mechanical properties of the material itself are mainly affected by the actual effect, which has the nature of iron and the properties of steel. The metallographic structure of the annealed ductile iron casting is ferrite with a little pearlite, and its mechanical properties are better.