High-nickel alloy
High-nickel alloy, a non-ferrous alloy composed of nickel as the matrix and adding other elements. The main alloying elements are chromium, tungsten, molybdenum, cobalt, aluminum, titanium, boron, zirconium and so on. Among them, chromium plays the role of anti-oxidation and anti-corrosion, and other elements play the role of strengthening. It has high strength, oxidation resistance and gas corrosion resistance at a high temperature of 650-1000 ° C. It is the most widely used and highest high-temperature strength alloy among superalloys.
Main categories:
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Nickel-based superalloy. The main alloying elements are chromium, tungsten, molybdenum, cobalt, aluminum, titanium, boron, zirconium and so on. Among them, chromium plays the role of anti-oxidation and anti-corrosion, and other elements play the role of strengthening. It has high strength, oxidation resistance and gas corrosion resistance at a high temperature of 650-1000 ° C. It is the most widely used and highest high-temperature strength alloy among superalloys. It is used to manufacture aero-engine blades and high-temperature components on rocket engines, nuclear reactors, and energy conversion equipment.
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Nickel-based corrosion-resistant alloy. The main alloying elements are copper, chromium and molybdenum. It has good overall performance and is resistant to various acid corrosion and stress corrosion. The earliest application is nickel-copper alloy, also known as Monel alloy; in addition, there are nickel-chromium alloy, nickel-molybdenum alloy, nickel-chromium-molybdenum alloy, etc. Used in the manufacture of various corrosion-resistant parts.
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Nickel-based wear-resistant alloy. The main alloying elements are chromium, molybdenum, and tungsten, with small amounts of niobium, tantalum, and indium. In addition to its wear resistance, its oxidation resistance, corrosion resistance and welding performance are also good. It can be used to manufacture wear-resistant parts, and can also be used as a cladding material, which can be clad on the surface of other base materials through surfacing welding and spraying processes.
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Nickel-based precision alloy. Including nickel-based soft magnetic alloys, nickel-based precision resistance alloys and nickel-based electrothermal alloys. The most commonly used soft magnetic alloy is Permalloy containing about 80% nickel, which has high maximum and initial permeability and low coercive force, and is an important iron core material in the electronics industry. The main alloying elements of nickel-based precision resistance alloys are chromium, aluminum, and copper. This alloy has high resistivity, low temperature coefficient of resistivity and good corrosion resistance, and is used to make resistors. Nickel-based electric heating alloy is a nickel alloy containing 20% chromium, which has good oxidation resistance and corrosion resistance, and can be used for a long time at a temperature of 1000-1100 °C.
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Nickel-based shape memory alloy. Nickel alloy containing 50(at)% titanium. The recovery temperature is 70°C, and the shape memory effect is good. A small change in the proportion of nickel-titanium components can change the recovery temperature within the range of 30-100°C. It is mostly used in the manufacture of self-expanding structural parts used in spacecraft, self-excited fasteners used in the aerospace industry, artificial heart motors used in biomedicine, etc.
Main purpose:
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Manufacture high-temperature components on aero-engine blades and rocket engines, nuclear reactors, and energy conversion equipment.
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Heat treatment industry: such as furnace rollers, bell furnaces and annealing furnaces.
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Calciner: For example, use it to calcinate high-performance corundum, calcinate chromite to produce ferrochrome alloy, and recover nickel used as a catalyst in petrochemical industry.
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Chemical industry and petrochemical industry: use it to prepare new steam cracking naphtha furnace to produce hydrogen, etc.
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Automatic devices: such as catalytic support system, spark plug.
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Nuclear industry: use cleaning equipment, such as nuclear waste removal.
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Iron and steel industry: such as direct reduction of iron ore process to produce sponge titanium.
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Application in the automotive industry: valve seals. It has excellent properties of anti-oxidation, high temperature resistance and anti-vulcanization, spraying material.
