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Ductile iron is a casting term, refers to the specific material used for casting in the casting workshop, usually after accepting the liquid iron in front of the furnace, by truck to the casting place for pouring. this material is widely used in almost all major industries for its excellent properties, such as high strength, good plasticity and toughness, wear resistance, heat and mechanical impact resistance, high or low temperature resistance, corrosion resistance and dimensional stability, and so on. is widely used in almost all major industries. In order to meet the requirements of mechanical and physical properties under different conditions of use, there are several grades of ductile iron, provides a wide range of choices.12
The main technical parameters of ductile iron include its chemical composition, usually contains carbon, silicon, manganese, phosphorus, sulfur and other elements, and an appropriate amount of rare earth, magnesium and other nodular elements. The specific chemical composition ratio will vary according to different application requirements and performance requirements. for example, To ensure enough pearlite and the right amount of ferritic tissue, choosing the right carbon equivalent is crucial. In general, carbon equivalent is selected around the eutectic composition, to ensure the casting performance. silicon can improve the roundness of graphite balls, refine graphite, at the same time reduce the tendency of crystallization supercooling and white hole. However, when the silica content of is greater than 2.8%, may reduce the toughness and may increase the ductile-brittleness transition temperature. Therefore, in the selection of carbon and silicon content, should follow the principle of high carbon and low silicon 3.
The typical defects of ductile iron include poor nodularization and nodularization degradation, shrinkage porosity and shrinkage porosity. The characteristics and causes of these defects vary. For example, poor nodularization and nodularization degradation may be caused by high sulfur content or excess of antinodulating elements in the primary iron solution. In view of these defects, can be taken corresponding measures, such as low sulfur coke, desulfurization treatment, etc. 3.
Pearlitic nodular cast iron is a type of nodular iron. The pearlitic in the matrix accounts for more than 80%. This kind of ductile iron is usually obtained by normalizing treatment, can also be obtained by adding alloying elements and combined with technological measures. pearlitic ductile iron is mainly used in the manufacture of parts requiring high strength, with certain fatigue strength and wear resistance, such as diesel crankshaft, connecting rod.
Ductile iron is a casting term, refers to the specific material used for casting in the casting workshop, usually after accepting the liquid iron in front of the furnace, by truck to the casting place for pouring. this material is widely used in almost all major industries for its excellent properties, such as high strength, good plasticity and toughness, wear resistance, heat and mechanical impact resistance, high or low temperature resistance, corrosion resistance and dimensional stability, and so on. is widely used in almost all major industries. In order to meet the requirements of mechanical and physical properties under different conditions of use, there are several grades of ductile iron, provides a wide range of choices.12
The main technical parameters of ductile iron include its chemical composition, usually contains carbon, silicon, manganese, phosphorus, sulfur and other elements, and an appropriate amount of rare earth, magnesium and other nodular elements. The specific chemical composition ratio will vary according to different application requirements and performance requirements. for example, To ensure enough pearlite and the right amount of ferritic tissue, choosing the right carbon equivalent is crucial. In general, carbon equivalent is selected around the eutectic composition, to ensure the casting performance. silicon can improve the roundness of graphite balls, refine graphite, at the same time reduce the tendency of crystallization supercooling and white hole. However, when the silica content of is greater than 2.8%, may reduce the toughness and may increase the ductile-brittleness transition temperature. Therefore, in the selection of carbon and silicon content, should follow the principle of high carbon and low silicon 3.
The typical defects of ductile iron include poor nodularization and nodularization degradation, shrinkage porosity and shrinkage porosity. The characteristics and causes of these defects vary. For example, poor nodularization and nodularization degradation may be caused by high sulfur content or excess of antinodulating elements in the primary iron solution. In view of these defects, can be taken corresponding measures, such as low sulfur coke, desulfurization treatment, etc. 3.
Pearlitic nodular cast iron is a type of nodular iron. The pearlitic in the matrix accounts for more than 80%. This kind of ductile iron is usually obtained by normalizing treatment, can also be obtained by adding alloying elements and combined with technological measures. pearlitic ductile iron is mainly used in the manufacture of parts requiring high strength, with certain fatigue strength and wear resistance, such as diesel crankshaft, connecting rod.
