The difference between the pig iron and wrought iron

Believe that many people don't know how the difference between iron and wrought iron? Let me summarize the difference between the pig iron and wrought iron: nature difference: 1, pig iron, generally refers to the carbon content in 2 ~ 6.69% of the iron alloy. Also known as cast iron. In addition to carbon in cast iron, but also contains silicon, manganese, and small amounts of sulfur, phosphorus, etc., it may cause cannot be forged. 2, wrought iron: it is refined with cast iron with the comparison of pure iron. Carbon content below 0.02%, also called wrought iron, pure iron. Pure iron for carbon, phosphorus, sulfur and other impurities element content is low, the smelting is difficult, the manufacturing cost is greater than cast iron and steel.
Pig iron, wrought iron and steel, on the main difference is that carbon content of carbon content 2% of the iron, cast iron; Carbon content less than 0.04% of the iron, wrought iron; Carbon content in 0.05 ~ 2% Between the iron, known as steel.
Performance difference: 1, wrought iron performance: wrought iron texture is soft, good plasticity, good ductility, easy to deformation, can draw wire, low strength and hardness, easy to forging and welding, is not useful. The purpose of pure iron mainly as a electrician materials, with high magnetic permeability, can be used for all kinds of iron core. Also used as the material of high alloy steel, pure iron rarely used as a structural material, it is because it is soft, the intensity is not high. 2, pig iron performance: pig iron carbon, pig iron is hard, wear resistant, good castability, but iron hard and brittle, almost no plastic, not metal forming. Depending on the state of carbon in cast iron, and can be divided into pig iron for steel making, casting pig iron and nodular cast iron, etc.
(1) the carbon in the steelmaking pig iron mainly exist in the form of iron carbide, the cross section with a white, often also called white iron.
(2) the casting of the carbon in cast iron with flake graphite form, its fracture is gray, usually also called gray iron. Because the graphite soft, have embellish smooth effect, thus casting pig iron has good cutting, wear-resisting and casting performance. But it's a strength is not enough, so can not be forged, can only be used in the manufacture of all kinds of castings, such as casting a variety of machine tool bed, iron pipe, etc.
(3) of the carbon in the form of spherical graphite in ductile iron, its mechanical performance is far better than the gray iron and steel, it has excellent casting, machining and wear-resisting performance, has certain elasticity, are widely used in the manufacturing of crank shaft, gear, piston top casting as well as a variety of mechanical parts.
(4) in addition to the content of silicon, manganese, nickel, or other elements especially high iron, alloy cast iron, such as ferrosilicon, ferromanganese, commonly used for steelmaking raw materials. In steelmaking with certain alloy cast iron, can improve the performance of the steel. Pig iron chemical formula: Fe2O3 co = fe 2 + 3 + 3 co2