High-temperature alloy is a primary metal material with iron, nickel, and cobalt as the basic elements and doped with various elements such as chromium, aluminum, titanium, tungsten, and molybdenum. It can work for a long time at temperatures above 600°C and under certain stress conditions. It has multiple advantages such as high-temperature strength, oxidation resistance, hot corrosion resistance, fatigue performance, and fracture toughness. Therefore, it is widely used in aerospace, nuclear power, automotive industry, gas turbines, petroleum, etc. Chemical industry and other fields. From the perspective of global high-temperature alloy market application scenarios, the aerospace field has long ranked first, accounting for more than 56% of the market demand, and is mainly used in the manufacturing of aerospace engines and aerospace fasteners.
High-temperature alloys can be divided into three categories: iron-based high-temperature alloys, nickel-based high-temperature alloys and cobalt-based high-temperature alloys based on different basic elements. Among them, iron-based high-temperature alloys have a lower operating temperature and are generally used in parts with lower operating temperatures in engines; nickel-based high-temperature alloys have the highest operating temperatures and are widely used to manufacture the hottest parts of turbojet aero engines and various industrial gas turbines. ; Cobalt-based high-temperature alloy has a service temperature of about 950°C and has good castability and weldability. It is mainly used as guide blade material.
In addition to different basic elements, high-temperature alloys can also be divided into deformed high-temperature alloys and cast high-temperature alloys according to different manufacturing processes. Deformed high-temperature alloys are generally used in parts such as compressor disks and turbine disks in engines. The operating temperature is 600-1000°C, and their strength is relatively low, but their plasticity, hot workability and weldability are good; cast high-temperature alloys can be subdivided into other categories. There are three categories: axial crystal superalloys, directionally solidified columnar superalloys and single crystal superalloys. Single crystal superalloys have tensile, durability, creep fatigue, oxidation resistance and hot corrosion resistance properties and have been widely used in the manufacture of turbine blades.
In the aviation field, high-temperature alloys are mainly used in the four hot-end components of aeroengines: combustion chambers, turbine blades, guide vanes and turbine disks. The combustion chamber is the source of mechanical energy generation. Its walls and combustion chamber are mainly made of high-temperature alloy materials. Because they need to withstand temperatures above 800°C, the materials must have good fatigue resistance, strong oxidation resistance, and good cutting performance. . Turbine blades are one of the most critical components of aeroengines. Turbine blades must withstand high centrifugal stress, vibration stress, thermal stress, etc. while withstanding high temperatures. The main material used in manufacturing turbine blades is cast high-temperature alloy, which is currently widely used. Made of single crystal high temperature alloy. Guide vanes are components used to adjust the flow direction of gas coming out of the combustion chamber. They are also important components in aeroengines. They must withstand the impact and erosion of high-temperature and high-speed airflow, so they need to have high-temperature strength and heat-corrosion resistance. The materials used Mainly nickel-based high-temperature alloys. The turbine disc is another important component in the turbine engine. It withstands the action of high-temperature and high-speed airflow and needs to have high-temperature strength and fatigue resistance. The material used is also a cast high-temperature alloy.
In addition to the aviation field, high-temperature alloys are also widely used in nuclear power, automotive industry, gas turbines, petrochemical industry and other fields. In the field of nuclear power, high-temperature alloys are mainly used to manufacture fuel elements and reactor pressure vessels in nuclear reactors; in the automotive industry, high-temperature alloys are mainly used to manufacture turbochargers; in the field of gas turbines, high-temperature alloys are mainly used to manufacture the hottest parts of gas turbines. End parts; in the petrochemical industry, high-temperature alloys are mainly used to manufacture high-temperature and high-pressure steam pipelines, petrochemical reactors, and hydrogenation reactors.
Generally speaking, superalloys are indispensable and important materials in aerospace, nuclear power, automotive industry, gas turbines, petrochemicals and other fields. They have a variety of excellent properties and can be used under extreme working conditions such as high temperature, high pressure and strong corrosion. need.
Tianjin Anton Metal Manufacture Co., Ltd. is a company specializing in the production of various nickel-based alloys, Hastelloy alloys and high-temperature alloy materials. The company was established in 1989 with a registered capital of 10.0 million, specializing in the production and sales of alloy materials. Anton Metal’s products are widely used in aerospace, chemical industry, electric power, automobile, nuclear energy and other fields, and can also provide customized alloy material solutions according to customer needs. If you need to know the price consultation of alloy materials or provide customized alloy material solutions, please feel free to contact the sales staff.
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Post time: Nov-25-2023
