Liaocheng Hongfu Pipeline Co., Ltd. provides ductile iron use (ductile iron pipe)
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The use of ductile iron:
1: Pressure Pipes and Fittings Ductile Iron Used as Piping When started, iron pipes and fittings are mostly manufactured in major industrial countries. Their manufacture, design, and use comply with both national and international standards and codes of practice (I502531). For transporting water and other liquids, it has long been proved that ductile iron pipes are superior to gray cast iron pipes. The main reason for this transformation is the combination of the strength and toughness of ferritic spheroidal graphite cast iron, which makes the pipes made of this material withstand high operating pressures and can be hauled away when laid. Gas transportation pipelines must be able to withstand the requirements of multiple use strips, ie, excavation and municipal engineering construction and transportation in the vicinity of the pipelines. High-strength, high-cut and simple installation and connection processes of ductile iron pipelines have been demonstrated This material is decisive.
2: Automotive applications As far as the tonnage of production is concerned, the automotive industry is the second user of ductile cast iron castings, the most numerous of which are. Ductile iron is used in three main places in automobiles: (1) power source-an engine component; (2) power transmission-gear train, gear and bushing; (3) vehicle suspension, brake and steering device. The power source crankshaft is a component that withstands continuously varying bending, twisting, and shear loads, and it has to cycle through billions of times during its service life. Automotive design engineers discovered that magnesium was used as early as 19152. After the year, the possibility of using ductile irons was immediately considered. Almost all Ford Motor Company crankshafts are made of this material. Most gasoline engines in the world are equipped with ductile iron crankshafts instead of forged steel crankshafts. This application is considered to be a typical example of value engineering.
Manufacturers of automotive diesel engines have carefully considered the selection of crankshaft materials from the viewpoint of prolonging the service life of the engine. When the high-strength bainite isothermal pyrotechnics is used to increase the power-to-weight ratio, the expanded use of turbochargers affects the According to the design of the material, the temperature of the exhaust pipe equipped with a turbocharger is increased to 500 to 70. C. Under these conditions, oxidation and creep strength become important. The ductile iron with excellent performance is replacing gray cast iron in the exhaust pipe, and as the temperature increases, silicon-alloy ductile iron will be further used.
Automotive power transmission The malleable cast iron parts are sometimes used as the transmission parts of automobiles, and the ductile iron is applied to wafer disc clutches, differential gear boxes, rear axles, wheel housings, and the like. The G. Fiseher foundry in Sehaffhausen, Switzerland, has many applications in this area. They work closely with designers to convert steel castings, forgings and malleable iron castings into ductile iron castings. Suspensions Nowadays, iron is often used as suspension components such as spring hooks and brake system main safety components (brake calipers) and steering knuckles.
3: Agriculture, roads and building applications Modern economic agricultural methods require the provision of reliable and long-lasting agricultural machinery in the required conditions. The ductile iron castings widely used throughout the agricultural industry include various tractor accessories, plough birch, brackets, clamps and pulleys. The typical components are the rear axle housings of agricultural vehicles. 'It originally used steel castings. The road paving and construction industries all require a considerable amount of equipment to be burned, including bulldozers, hammers, cranes and compressors. Ductile iron castings have applications in these areas.
4: General application The ductile iron machine tool industry utilizes the engineering properties of ductile iron, which allows the design of complex machine tool components and castings weighing more than 10. Tons of heavy machine castings. Applications include injection stencils, forging cylinders and pistons. Ductile iron has high tensile strength and yield strength, and has good machinability, allowing the production of lighter castings to maintain rigidity. Also, the strength and toughness of ductile iron make it an ideal material for various hand tools such as wrenches, clamps and gauges.
The paper machine industry utilizes the high strength and high modulus of elasticity of ductile iron. For example, compared with gray cast iron, the ductility of the ductile iron is 60% higher, and the weight can be reduced when the pressure roller and the drying drum are designed. Similarly, ductile iron (suitably added nickel-niobium alloy) rolls are used in steel mills and have higher performance than steel and chilled cast iron.
5: Manufacturers of valve-manufactured valves are the main users of ductile iron (including austenitic ductile iron) and their applications include the successful delivery of various acids, salts, and alkaline liquids.
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Strong and durable: Aluminum alloy has high strength and hardness, can withstand the collision and wear in daily use, and has a long service life.
Corrosion resistance: Aluminum will naturally form an oxide film in the air. This oxide film can effectively prevent aluminum from further oxidation and corrosion, making it stable and not easily damaged in environments such as moisture, acid and alkali.
Good fire resistance: Aluminum alloy has good high temperature resistance, which can play a role in fire prevention to a certain extent and increase the safety of living.
Good sealing: Aluminum doors can be equipped with high-quality sealing strips to effectively improve the sealing performance of the door, and have significant sound insulation, heat insulation, and dustproof effects.
Various styles: Through different surface treatment processes and designs, a variety of colors and styles can be achieved to meet different decoration styles and personal preferences.
Environmental protection: Aluminum is a recyclable material and conforms to the concept of environmental protection.