Product Introduction

FCD400 ductile iron lost wax investment casting

Microstructure and properties of ductile iron

[Structure] : The carbon content of ductile iron is higher (2.7%~4.0%), which can be regarded as the matrix of carbon steel with flake graphite.

According to the different matrix structure nodular cast iron can be divided into three categories: ferrite matrix nodular cast iron; Ferrite-pearlite matrix

Ductile iron; Pearlitic matrix nodular iron.

FCD450 ductile iron

[Mechanical properties] : The mechanical properties of ductile iron are related to the structure of the matrix and the morphology of graphite. A piece of ductile iron

The cut of the graphite to the matrix is serious, which is easy to cause stress concentration at the sharp corners of the graphite, so that the tensile strength of ductile iron,

Plasticity and toughness are much lower than steel, but the compressive strength is comparable to steel, and it is also a cast iron with poor mechanical properties in common cast iron.

At the same time, the matrix structure also has a certain effect on the mechanical properties of nodular cast iron. The graphite sheet of ferrite matrix nodular cast iron is thick.

Low strength and hardness, so less application; The graphite sheet of pearlite matrix nodular cast iron is small and has high strength and hardness.

Mainly used to make more important castings; The graphite sheet of ferritic-pearlitic matrix nodular cast iron is slightly larger than that of pearlitic nodular cast iron.

The performance is not as good as pearlitic ductile iron. Therefore, spheroidal graphite cast iron with pearlitic matrix is used more in industry.

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