What's the color of the pig iron?
Nodular cast iron: ductile iron to carbon in the form of spherical graphite, which is far better than the mechanical properties of gray cast iron and steel. Close to performance: excellent casting, machining and wear resistance, and has certain elasticity. Ductile iron foundry is a kind of cast iron, but low sulfur and phosphorus. The sulfur in iron sufficient carbon graphite. Low phosphorus improve the mechanical properties of cast iron.
Cast iron casting of silicon content in pig iron as 1.25~3.6%, carbon flake graphite form exists, the cross section was gray, commonly known as gray. Performance: soft, easy cutting, wear-resistant and good casting properties.Steel and iron: silicon steel and iron is not greater than 1.7% carbon exists in the form of Fe3C carbide, white section, commonly known as white iron: hard and brittle properties.
Chemical composition: pig iron, in addition to iron, but also contains carbon, silicon, manganese, phosphorus and sulfur and other elements, these elements on the performance of pig iron have certain influenceAccording to the different forms of carbon in the iron exists as three kinds: steel and iron (cast iron), cast iron (gray), nodular cast iron.
Iron carbon content is greater than 2% (2.11%) of the iron carbon alloy industry, iron carbon content is generally 2.5%--4%, Si, Mn, S and P, and other elements, is the use of iron ores in blast furnace products.
