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Properties of Nickel Based Alloys

2023-09-06 15:13:57  Knowledge

Nickel-based alloy is based on nickel and is composed of various alloying elements. It has excellent high-temperature resistance, corrosion resistance, oxidation resistance, and mechanical properties and is mainlymainly used in aviation, aerospace, petrochemical and other fields. The article will provide a detailed introduction to the Composition, properties, preparation methods, application fields, and future development trends of nickel-based alloys, providing references for research and application in related fields.

Composition of nickel-based alloys

The Composition of nickel-based alloys mainly includes nickel, iron, chromium, molybdenum, cobalt, tungsten, etc. Among them, nickel is the main element with excellent corrosion and oxidation resistance. The added alloying elements 

can further enhance the performance of nickel-based alloys, such as iron, chromium, molybdenum, etc., which can improve high temperature and corrosion resistance. In contrast, cobalt, tungsten, and other elements can enhance the mechanical properties of nickel-based alloys.


Properties of nickel-based alloys

High-temperature resistance

Nickel-basedNickel-based alloys have excellent high-temperature resistance and can maintain high strength and hardness at high temperature while exhibiting good creep and fatigue properties. For example, Inconel 718 alloy can maintain good strength and toughness at high temperatures of 650 ℃, while Nimonic 80A alloy can maintain good creep and fatigue properties at high temperatures of 900 ℃.

Corrosion resistance

Nickel-based alloy have excellent corrosion resistance and can withstand various corrosive media, such as oxidants, acids, alkalis, etc. Its corrosion resistance mainly depends on the added alloy elements and heat treatment conditions. For example, Alloy 20 alloy has good nitric acid and sulfuric acid resistance, while Hastelloy X alloy can withstand high-temperature oxidation and carburization.

Mechanical properties

Nickel-based alloys have high mechanical properties, such as strength, hardness, toughness, and plasticity. Its mechanical properties mainly depend on the alloy's composition and heat treatment conditions. For example, Incoloy 800H alloy has high yield strength and creep properties, while Hastelloy C-276 alloy has good corrosion resistance and mechanical properties.

Preparation methods of nickel-based alloys

The preparation methods of nickel-based alloys mainly include melting, casting, forging, and heat treatment. Among them, smelting is a key step in preparing nickel-based alloys, which requires controlling factors such as smelting temperature, smelting time, and smelting atmosphere. Casting is the main method for preparing nickel-based alloy castings, which can produce parts with complex shapes. Forging can improve the mechanical properties of nickel-based alloys and enhance the density and toughness of materials. Heat treatment can change nickel-based alloys' microstructure and phase composition, further improving their properties.

Application fields of nickel-based alloys

Nickel-based alloys are widely used in aviation, aerospace, petrochemical and other fields. In the aviation industry, nickel-based alloys can manufacture components for aircraft engines and gas turbines, such as turbine blades, guides, and discs. In aerospace, nickel-based alloys can manufacture key components such as combustion chambers, nozzles, and turbine discs for rocket engines. In the petrochemical industry, nickel-based alloys can manufacture key equipment such as high-temperature and high-pressure reactors and pipelines, such as hydrogenation and reforming reactors.

Future development trends of nickel-based alloys

With the continuous development of technology, nickel-based alloys will be more widely used and developed. The development trend of nickel-based alloys in the future mainly includes the following aspects:

High performance: With the increasing requirements for material performance in aviation, aerospace, petrochemical and other fields, nickel-based alloys need to further optimize their composition and preparation process to improve their performance to meet the growing demand.

Lightweight: In the context of energy conservation and emission reduction, lightweight has become an important development direction for the manufacturing industry. Nickel-based alloys can achieve lightweight manufacturing by optimizing design and adopting advanced preparation processes, improving product performance and reducing energy consumption.

Intelligence: With the continuous development of emerging technology such as the Internet of Things and intelligent manufacturing, nickel-based alloys need to adapt to the needs of intelligent manufacturing and develop new intelligent materials and products, such as shape memory alloys and intelligent sensors.

Environmentally friendly: Nickel-based alloys may cause environmental pollution during manufacturing and use. Therefore, it is necessary to develop environmentally friendly nickel-based alloys to reduce environmental negative impacts.

In short, nickel-based alloys, as an excellent functional material, will be widely used and developed. Researchers and enterprises in related fields need to strengthen their research and application of nickel-based alloys, continuously develop new nickel-based alloy products to meet the growing demand and promote the development of related fields.


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