Ductile iron castings

The reason why graphite in ductile iron becomes spherical is that spheroidizing agent which can make graphite spherical is added into molten iron. The products produced by ductile iron casting technology have the advantages of good strength, high toughness and suitable price, which meet the requirements of automobile production. Therefore, ductile iron casting technology is widely used in automobile production,
The results show that the splitting effect of spheroidal graphite on metal matrix is smaller than that of graphite with other shapes. The strength of cast iron can reach 70-90% of that of matrix structure, and the tensile strength can reach 120 kgf / mm ~ 2.
In addition to iron, the chemical composition of nodular cast iron is usually 3.0-4.0% carbon, 1.8-3.2% silicon, less than 3.0% manganese, phosphorus and sulfur, and appropriate amount of rare earth, magnesium and other nodular elements. Ductile iron has good strength and toughness. It develops very fast in many areas. Its output has exceeded that of cast steel and malleable iron, and it has become the casting alloy material next only to gray iron. Ductile iron castings have been widely used in almost all major industrial sectors. These sectors require high strength, plasticity, toughness, performance, resistance to severe thermal and mechanical impact Based on the actual report or low temperature, based on the actual report and dimensional stability.