What conveniences do ductile iron castings bring to people when used
Ductile iron castings have a place in some casting industries, and they are high-strength cast iron materials.
Ductile iron castings - manhole covers are generally divided into circular and square shapes. In urban road management, circular manhole covers are commonly used, as they are not easy to tilt and can better maintain pedestrians and vehicles. When using a circle, the main consideration is that the length of each diameter of a circular manhole cover passing through its center is the same. This way, if the manhole cover is rolled up by a passing vehicle, regardless of how it is rolled up, its diameter will be slightly wider than the lower wellhead, and the manhole cover will not fall into the wellhead.
Due to the microstructure of spherical graphite in ductile iron castings, they are superior to cast steel in terms of weakening vibration ability, which is more conducive to reducing stress. An important reason for choosing ductile iron castings is that the cost of ductile iron is lower than that of cast steel. The low cost of ductile iron castings makes this material increasingly popular, resulting in higher casting efficiency and lower machining costs for ductile iron.
Ductile iron castings are a type of high-strength cast iron material developed in the 1950s, with comprehensive properties similar to steel. Based on their excellent performance, ductile iron castings have been successfully used to cast some parts with complex stress, high strength, toughness, and wear resistance requirements. Ductile iron castings have rapidly developed into a widely used cast iron material, second only to gray cast iron. The so-called substitution of iron for steel mainly refers to ductile iron castings. Spheroidal graphite is obtained from ductile iron castings through spheroidization and inoculation treatment, effectively improving the mechanical properties of cast iron, especially the plasticity and toughness, thereby achieving higher strength than carbon steel.
