Composition and Characteristics of BFe10-1-1 White Copper Tubes and Pipes
BFe10-1-1 white copper pipe belongs to the structure of less nickel-containing iron copper, Cu-Ni alloy based on the addition of a small amount of iron (Fe: 1.0 - 1.5) and manganese (Mn: 0.5 - 1.0) and other elements, the formation of tetrameric alloys. The addition of iron and manganese greatly optimizes the corrosion resistance of the material. Its density is 8.99 g/cm³ at room temperature and its melting temperature range is 1100 - 1150°C. It is suitable for use in atmospheric, fresh and seawater environments. In the atmosphere, fresh water, seawater and flowing seawater, the alloy shows very high corrosion resistance, and at the same time has high strength and good mechanical and chemical properties, is commonly used corrosion-resistant condenser tube materials.
Widely used in the marine industry
Seawater piping system
The seawater cooling system of the ship adopts a large number of BFe10-1-1 copper-nickel seamless tubes. Seawater is extremely corrosive, and it is difficult for ordinary metal pipes to resist its erosion. BFe10-1-1 copper-nickel seamless tubes can work stably in seawater for a long time due to their excellent seawater corrosion resistance. Taking the condenser, heat exchanger and other equipments of a ship as an example, using this pipe as seawater transportation pipeline can effectively prevent leakage due to corrosion of the pipeline, ensure the normal operation of the ship's cooling system, and then ensure the stable operation of the ship's power system. In clean seawater, the alloy can withstand water velocity up to 2.2 - 2.5m / s, the highest speed in micro-salt solution up to 4m / s, and can avoid stress corrosion cracking and high-temperature point of nickel removal problems.
Hull Structures
BFe10-1-1 copper-nickel seamless tubes are also used for hull structure parts of some ships. It not only has good strength and toughness to withstand the mechanical loads such as wind and wave impacts, hull vibration and other mechanical loads faced by the ship when sailing, but its corrosion resistance also helps to extend the service life of the hull structural parts, reduce the maintenance cost, and improve the overall safety and economy of the ship.
Third, the important role of the chemical industry
Chemical equipment piping
In chemical production, all kinds of equipment and pipelines need to withstand the corrosion of various chemical substances, BFe10-1-1 iron copper rods and seamless tubes can be widely used in petrochemical plant equipment and pipelines, can effectively deal with a variety of complex chemical environments, to ensure the long-term stable operation of equipment, reduce the number of downtime due to corrosion and maintenance, improve production efficiency.
Condensing and heat exchange equipment
The condenser and heat exchanger tubes in chemical production are mostly made of BFe10-1-1 copper. Its good thermal conductivity and corrosion resistance, so that in the high temperature, corrosive media environment, can still efficiently complete the heat exchange work, to protect the continuity and stability of the chemical production process. For example, in some of the need to condense steam into a liquid process, BFe10-1-1 white copper tube produced by the condenser tube can quickly transfer the heat of the steam out, while resisting the possible existence of corrosive components in the condensate erosion.
Fourth, the main points of the manufacturing process
BFe10-1-1 white copper tube is generally melted by low-frequency or medium-frequency induction furnace and covered with charcoal to prevent the alloy from being oxidized during the melting process. The casting process is semi-continuous with direct water-cooled crystallizers and covered with soot. The production of BFe10-1-1 white copper ingots usually adopts the semi-continuous casting method. The 7500kg medium-frequency iron-free electric furnace used for smelting mainly consists of the furnace body, tilting device, power supply and control system, hydraulic system, water-cooling system and so on, while the casting equipment consists of intermediate packages, crucibles, crystallizers, hauling machines and cooling systems. Suitable production process is the key to ensure the excellent performance of BFe10-1-1 white copper tube.
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