4J36 iron-nickel alloy is a special alloy with ultra-low coefficient of expansion, which is widely used in electronics, electric power, aerospace and other fields because of its good thermal expansion properties and magnetic properties. This article will introduce the characteristics, application and production process of 4J36 iron-nickel alloy in detail.
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1. Characteristics of 4J36 iron-nickel alloy.
4J36 iron-nickel alloy is a special alloy with ultra-low coefficient of expansion, and its chemical composition is mainly composed of iron and nickel, and also contains a small amount of carbon, silicon and other elements. The alloy has the following characteristics:
1.Ultra-low coefficient of expansion: The coefficient of expansion of 4J36 iron-nickel alloy is very low, in the range of room temperature to 200, its coefficient of expansion is about 15 10-6, much lower than the expansion coefficient of general steel. Therefore, the dimensional stability of the alloy is very good in the high-temperature environment, which can effectively reduce the error caused by temperature changes.
2.Good magnetic properties: 4J36 iron-nickel alloy has good magnetic properties, and its saturation magnetic induction intensity can reach 1About 5t, low coercivity, strong anti-magnetic interference ability. Therefore, the alloy is widely used in various electromagnetic devices, such as transformers, inductors, etc.
3.Good processing performance: 4J36 iron-nickel alloy has good processing performance, and can be produced by conventional smelting, casting, forging, rolling and other processes. At the same time, the welding performance of the alloy is also good, and various welding methods can be used for connection.
4.Good corrosion resistance: 4J36 iron-nickel alloy has good corrosion resistance in oxidizing media, reducing media and salts and other environments. At high temperatures, the alloy has better corrosion resistance.
Second, the application of 4J36 iron-nickel alloy.
Due to the above characteristics of 4J36 iron-nickel alloy, it has been widely used in electronics, electric power, aerospace and other fields. The specific applications are as follows:
1.Electronics: In the electronics field, 4J36 iron-nickel alloy is widely used in various electronic devices, such as high-precision optical instruments, lasers, electron tubes, vacuum devices, etc. These devices need to withstand a variety of complex environments such as high temperature, low temperature, and strong magnetic field during use, and the ultra-low expansion coefficient and high magnetic properties of 4J36 iron-nickel alloy can meet these requirements.
2.Electric power: In the electric power field, 4J36 iron-nickel alloy is used in the insulation layer of high-temperature wires and cables, as well as the core material of electrical equipment such as transformers and transformers. These equipment need to operate in a high-temperature environment for a long time, and the excellent performance of 4J36 iron-nickel alloy can effectively improve the service life and safety of the equipment.
3.Aerospace: In the aerospace field, 4J36 iron-nickel alloy is widely used in the manufacture of various aircraft and rockets, such as turbine engine blades, space shuttle heat insulation, etc. These equipment need to operate in extreme environments such as high temperature, high speed, and strong magnetism, and the ultra-low expansion coefficient and high magnetic performance of 4J36 iron-nickel alloy can meet these requirements.
3. Production process of 4J36 iron-nickel alloy.
The production of 4J36 iron-nickel alloy requires the following processes:
1.Smelting: Iron, nickel and other raw materials are smelted in a high-temperature melting furnace to prepare molten iron-nickel alloys.
2.Casting: The molten iron-nickel alloy is poured into the mold, and the casting is obtained after cooling and solidifying.
3.Forging: The casting is heated and then forged to obtain the desired shape and size.
4.Rolling: A rolling mill is used to roll the forged material to obtain the desired thickness and width.
5.Heat treatment: heat treatment is applied to the rolled material to adjust its mechanical and magnetic properties.
In conclusion, 4J36 iron-nickel alloy is a special alloy with ultra-low expansion coefficient because of its good thermal expansion properties and magnetic properties.