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NCU30 copper-nickel alloy is a copper-based alloy with nickel as the main added element, usually containing about 63% nickel and a small amount of iron, manganese and other elements. It has excellent corrosion resistance, thermal and electrical conductivity and processing properties, and is widely used in petroleum, chemical industry, electric power, shipbuilding, nuclear industry and other fields.
1. Characteristics. 1.Corrosion resistance: NCU30 copper-nickel alloy has very good corrosion resistance, especially in environments such as reducing acids and salts. This is mainly due to the addition of nickel, which forms a dense oxide film on the surface of the alloy, effectively preventing the intrusion of corrosive media.
2.Thermal and electrical conductivity: NCU30 copper-nickel alloy has good thermal and electrical conductivity, which can meet the requirements of high temperature, high pressure and other harsh environments. In addition, the resistivity of the alloy is also relatively low, which is conducive to the conduction of electric current.
3.Processability: NCU30 copper-nickel alloy is easy to carry out cold and hot processing, and its processing performance is good. After annealing, the alloy has low hardness and is easy to plastically deform, and parts of various shapes and specifications can be prepared by rolling, extrusion, casting, etc.
Second, the use. 1.Petrochemical industry: NCU30 copper-nickel alloy is widely used in the petrochemical industry to manufacture pipes, valves, heat exchangers, pumps and other equipment. Due to its excellent corrosion resistance, it can ensure long-term stable operation of the equipment in harsh chemical environments.
2.Electric power: In the electric power field, NCU30 copper-nickel alloy is mainly used to manufacture condensers, heat exchangers and other equipment in generator sets. Its excellent thermal and electrical conductivity helps to improve the heat dissipation efficiency and heat exchange efficiency of the equipment.
3.Shipbuilding industry: In the shipbuilding industry, NCU30 copper-nickel alloy is often used in the manufacture of ship pipelines, seawater pumps and other equipment. The alloy can withstand high salt spray, humidity and other conditions in the marine environment to ensure the normal operation of ship equipment.
4.Nuclear industry: In the nuclear industry, NCU30 copper-nickel alloy is used in the manufacture of key equipment such as cooling pipes and heat exchangers in nuclear reactors due to its excellent corrosion resistance and thermal and electrical conductivity.
3. Preparation process.
The preparation process of NCU30 copper-nickel alloy mainly includes three stages: smelting, casting and processing.
1.Smelting: The raw materials are mixed according to a certain proportion and then smelted at high temperature to form a uniform alloy melt. During the melting process, attention should be paid to controlling the temperature and stirring speed to ensure the uniformity of the melt composition and reduce the impurity content.
2.Casting: The molten alloy obtained by smelting is poured into the casting mold, and the casting is obtained after cooling and solidification. During the casting process, the pouring temperature and speed, as well as the temperature and cooling conditions of the mold, need to be controlled to ensure the quality and dimensional accuracy of the casting.
3.Processing: Rolling, extrusion, stretching and other processing operations are carried out on castings to obtain NCU30 copper-nickel alloy parts of various specifications and shapes. In the process of processing, it is necessary to pay attention to the control of processing parameters and process conditions to ensure the dimensional accuracy and surface quality of the parts.