Ductile iron to carbon in the form of spherical graphite, which is far better than the mechanical properties of gray cast iron and close to steel, it has excellent casting, machining and wear resistance, has a certain flexibility, widely used in the manufacture of gear, crankshaft, piston and a variety of advanced casting machine parts.In addition, there are very high silicon, manganese, nickel or other elements of pig iron, called alloy pig iron, such as ferrosilicon, ferromanganese, etc., commonly used as raw material for steelmaking. Adding certain alloy iron in steel-making, can improve the performance of steel
Carbon steel-making pig iron mainly exists in the form of iron carbide, the white section, usually called white iron. This kind of hard and brittle properties of cast iron are generally used as raw material for steelmaking.Cast iron in carbon flake graphite form exists, its fracture is gray, usually known as gray iron. Because graphite is soft, with lubrication, so the cast iron has good abrasion resistance, cutting and casting performance. But it is not anti digital strength, so it can not be forged, can only be used in the manufacture of various castings. Such as a variety of machine tool bed casting base, iron pipes and so on.
Pig iron is an alloy of iron and carbon carbon content more than 2%, pig iron carbon content is generally in 2.5%--4%, including C, SI, and Mn, S, P and other elements, is the use of iron ores in blast furnace products. According to the different forms of carbon in pig iron, and can be divided into pig iron, cast iron and steel ball ductile cast iron and other types.Pig iron performance: pig iron is hard, wear-resisting, casting good, but pig iron is crisp, can not forge
