The difference between pig iron and wrought iron

The difference between pig iron and wrought iron: 1. Definition and composition; 2. Properties; 3. Use; 4. Smelting difficulty and cost. Detailed introduction: 1. Definition and composition. Pig iron usually refers to an alloy of iron with a carbon content of 2~4.3%. In addition to carbon, pig iron also contains silicon, manganese and a small amount of sulfur, phosphorus and other elements. These impurities make pig iron Hard and brittle, it cannot be used to make products that require a high degree of plasticity and toughness. Wrought iron is also called wrought iron or pure iron. Its carbon content is much lower than pig iron, usually no more than 0.05%, and the impurities in wrought iron are also greatly reduced. , so it has better plasticity and toughness, etc.

# Pig iron and wrought iron differ significantly in several ways.

1. Definition and composition:

Pig iron: usually refers to an iron alloy with a carbon content of 2~4.3%. In addition to carbon, pig iron also contains silicon, manganese and a small amount of sulfur, phosphorus and other elements. These impurities make pig iron hard and brittle and cannot be used to manufacture products that require high plasticity and toughness. Pig iron can be obtained by smelting it directly from iron ore in a blast furnace.

Wrought iron: Also known as wrought iron or pure iron, its carbon content is much lower than pig iron, usually no more than 0.05%. The impurities in wrought iron are also greatly reduced, resulting in better plasticity and toughness. Wrought iron is obtained by oxidizing pig iron at high temperatures to burn off carbon and other impurities, and then reducing it.

2. Properties:

Pig iron: Due to its high carbon content, pig iron is hard and brittle, with good wear resistance and castability, but its plasticity is poor. Poor, forging is not possible. The fracture of pig iron is rough and irregular, showing a grainy texture. According to the different forms of carbon in pig iron, it can be divided into steelmaking pig iron, casting pig iron and ductile iron.

Wrought iron: The low carbon content makes wrought iron soft, ductile, easy to deform, and has good plasticity and toughness. The fractures of wrought iron are generally smooth and neat.

3. Usage:

Pig iron: Due to its wear resistance, good castability and relatively low price, pig iron is often used to cast various machine tools. Bed bases, iron pipes and other products. Adding certain alloy pig iron during steelmaking can improve the properties of steel.

Wrought iron: Due to its good plasticity and toughness, wrought iron is often used to manufacture various metal products that require bending, drilling or deep drawing, such as pots, kettles and other kitchen utensils and high-grade alloy steel of raw materials.

4. Smelting difficulty and cost:

Pig iron: Since a large amount of carbon and other impurities need to be processed during the smelting process, pig iron is more difficult to smelt and the manufacturing cost is far higher. In wrought iron and steel.

Wrought iron: Due to its low carbon content, relatively simple smelting process, and low requirements for raw materials, the manufacturing cost of wrought iron is relatively low.

To sum up, there are significant differences between pig iron and wrought iron in terms of composition, properties, uses, smelting difficulty and cost. For more information, it is recommended to consult the relevant literature or consult a materials science expert.

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