Properties of gray cast iron

The mechanical properties of gray cast iron are related to the microstructure of matrix and graphite.

Serious flake graphite in gray cast iron matrix of the fragmented, easy cause stress concentration in graphite in pointed, leading to the tensile strength of gray cast iron, making the plasticity and toughness much lower than that of steel, but the compressive strength is same to the steel, is also commonly used in cast iron parts in mechanical properties of the cast iron.At the same time, the matrix structure of gray cast iron has a certain effect on the mechanical properties, the ferrite matrix gray cast iron graphite sheet is thick, the strength and the hardness is lowest, so the application is less; The graphite sheet of the pearlite matrix gray cast iron is small, and has high strength and hardness, which is mainly used to manufacture more important grey iron casting; The graphite sheet of a pearlite matrix gray cast iron is slightly thick, and the performance is not as good as the pearlite gray cast iron. Therefore, the industrial use of the pearlite matrix of gray iron. Gray cast iron has good casting properties, good vibration reduction, good abrasion resistance, good cutting performance and low notch sensitivity.

This blog is  published by the grey iron casting manufacturer RUYI FOUNDRY CO., LTD.