What is the use of ductile iron?
As far as the tonnage is concerned, the automotive industry is the second largest producer of ductile iron castings, with the largest number of them. Ductile iron is used in three main parts of automobiles: (1) power source, engine parts; (2) power transmission of a gear train, gears and bushings; (3) vehicle suspension, brakes and steering gear. The power source is subjected to continuous change of the crankshaft bending, torsion and shear load, and in its service life, to one billion cycles of car design engineers early in the 19152 years that the processing method for magnesium found in four years later, immediately consider the possibility of using ductile iron. Almost all crankshafts of Ford motor are made of this material. Most gasoline engines in the world are fitted with ductile iron crankshafts instead of forged steel crankshafts, which are considered a typical example of value engineering.
Ductile iron is used as a conduit at the beginning. Iron pipes and fittings are mostly produced by major industrial countries. Their manufacture, design and use are in line with national standards and international standards and procedures (I502531). As far as water and other liquids are concerned, it has long been proved that ductile iron pipes are superior to gray iron pipes. The main reason for this change is the combination of strength and toughness of Ferritic Ductile Iron, which makes the pipes made of this material subject to high operating pressures and can be readily loaded and laid during laying. A gas pipeline must be able to withstand multiple use requirements, which stand near the pipeline excavation and municipal engineering construction and transportation, where the ball iron pipes with high strength, high performance and simple installation and connection technology has proved that this material selection is decisive.
Manufacturer of automotive diesel engines are starting from the prolong engine life, particularly cautious about expressing selection of crankshaft material, when the isothermal bainitic ductile iron and high strength in order to increase the power to weight ratio, expand the turbocharger use influence design according to the material, equipped with exhaust turbocharger tube the temperature is increased to 500 to 70. C, in this condition, the oxidation and creep strength become important. Ductile iron, with good properties, is being used instead of gray iron for the exhaust pipe and will further use silicon aluminum alloy ductile iron as the temperature increases.
