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01
2023
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03
A one-minute introduction to the uses of ductile iron
Pressure pipes and fittings, when ductile iron is used for pipes, iron pipes and fittings are mostly produced by major industrial countries, and their manufacture, design, and use comply with standards. As far as conveying liquids such as water is concerned, ductile iron pipes have long been proven to be superior to gray cast iron pipes. The main reason for this transition lies in the combination of the strength and toughness of ferritic ductile iron, which enables pipes made of this material to withstand higher working pressures and can be hastily loaded and unloaded during laying.
For pressure pipes and fittings, when ductile iron is used for pipes, iron pipes and fittings are mostly produced by major industrial countries, and their manufacture, design, and use comply with standards. In terms of transporting liquids such as water, ductile iron pipes have long been proven to be superior to gray cast iron pipes. The main reason for this transition lies in the combination of strength and toughness of ferritic ductile iron, which enables pipes made of this material to withstand higher working pressures and can be hastily loaded and unloaded during laying. Gas transmission pipelines must be able to withstand the requirements of various uses, such as excavation, municipal construction, and transportation near the pipeline. Here, the high strength, high shear, and simple installation and connection process of ductile iron pipes have proven that choosing this material is decisive.

Automobile
In terms of production tonnage, the automotive industry is a major user of ductile iron castings with many items. Ductile iron is mainly used in automobiles for: engine parts; gear trains, gears, and bushings; and brake steering devices. Power source crankshafts are parts that withstand constantly changing bending, torsional, and shear loads, and cycle billions of times during their service life. Most gasoline-powered vehicles are equipped with ductile iron crankshafts instead of forged steel crankshafts. This application is considered a typical example of value engineering.
Diesel engine manufacturers carefully consider the choice of crankshaft materials to extend the service life of the engine. When high-strength bainitic isothermal consumable ductile iron is used, in order to improve the power-to-weight ratio, the expanded use of turbochargers affects the design basis of the material. The exhaust pipe temperature of turbocharger-equipped engines increases, and oxidation and creep strength become important. High-performance ductile iron is replacing gray cast iron in exhaust pipes. As the temperature increases, silicon-aluminum alloy ductile iron will be further used.
Malleable cast iron parts used for automobile power transmission are sometimes used as transmission parts, and ductile iron has a strong trend of being applied to disc clutches, gearboxes, rear axles, and wheel housings. Converting cast steel, forged steel, and malleable cast iron parts into ductile iron parts. Suspension Now, iron is often used as suspension components such as spring hooks, as well as the main safety components of braking systems and steering knuckles.
Agriculture, Roads, and Construction
Modern economic agricultural methods require reliable agricultural machinery with a long service life in the required state. Ductile iron castings widely used throughout the agricultural industry include various tractor parts, plows, brackets, clamps, and pulleys. A typical part is the rear axle agricultural vehicle garage. It initially used steel castings. The road paving and construction industries require a large amount of equipment, including bulldozers, cranes, and compressors. Ductile iron castings are used in these areas. widespread application
The ductile iron machine tool industry utilizes the engineering characteristics of ductile iron, allowing the design of complex machine tool parts with castings weighing more than heavy machine castings. Applications include injection molds, forging cylinders, and pistons. Ductile iron has high tensile and yield strength, as well as good machinability, which makes it possible to produce lighter castings and maintain their rigidity. Similarly, the strength and toughness of ductile iron make it an ideal material for various hand tools such as wrenches, pliers, and measuring tools.
Ductile iron