How many degrees below zero the permanent magnet steel is demagnetized, and how many degrees will th

First of all, you have to confirm what kind of magnet it is, wind turbines need to use better rare earth permanent magnets, taking samarium cobalt magnets and NdFeB magnets as examples: 1) Samarium cobalt magnets: low temperature is not limited (can not be used with liquid nitrogen), as long as the use temperature does not exceed 350, the magnetic part will not affect the normal use; When the Curie temperature is reached at 800 degrees, the samarium cobalt magnet is demagnetized and has no magnetism.

After re-magnetization, most of it can be recovered (2:17 material). 2) NdFeB magnet, the maximum operating temperature is 220 degrees, and the remanence temperature coefficient is relatively large, rising by one degree, and the magnetic regression is more (compared to samarium cobalt magnet).

However, the magnetic properties of NdFeB are currently the strongest. When the Curie temperature reaches 300 degrees, the NdFeB is demagnetized, and it cannot be recovered after being re-magnetized.

In general, samarium cobalt can go to absolute zero... NdFeB is not very clear.

1. Magnet demagnetization temperature: Curie point is 750-760.

2. A magnet is a substance that can attract or repel each other, and if the small molecules inside an object can be arranged in the same direction, it will become a magnet. The composition is iron, cobalt, nickel and other atomic structures are special, the atoms themselves have magnetic moments, and the general arrangement of these mineral molecules is chaotic. The magnetic regions do not show magnetism when they affect each other, but under the guidance of external forces (such as magnetic fields), the molecular arrangement tends to be in the same direction, which is commonly known as magnets.

3. Iron, cobalt, nickel, is the most commonly used magnetic substance, basically magnets are divided into permanent magnets and soft iron, permanent magnets are added to strong magnetism, so that the spin of magnetic substances and the angular momentum of electrons are arranged in a fixed direction, soft magnetism is to add current (also a method of adding magnetic force) and other currents to remove soft iron will slowly lose magnetism.

4. A magnet is an object that can generate a magnetic field, which is a magnetic dipole that can attract ferromagnetic substances such as iron, nickel, cobalt and other metals. The magnetic pole is determined by hanging a magnet with a thin line, the magnetic pole pointing to the north is called the north pole or n pole, and the magnetic pole pointing to the south is the guide pole or the s pole. (If we think of the Earth as a big magnet, then the current geomagnetic north pole of the earth is the s pole, and the geomagnetic south pole is the n pole.)

Magnets attract at opposite poles and repel at the same poles. The compass pole attracts the north pole, the compass pole repels the compass pole, and the north pole repels the north pole.

Yes. There are generally three commonly used methods:

1. Demagnetization and demagnetization: (commonly used at the entrance of shopping malls);

2. Strong vibration demagnetization: (generally can not meet the requirements of complete demagnetization);

3. High temperature degaussing: (high temperature is the accelerated movement of the molecules in the magnet, thereby changing the direction of its original molecular current, and then changing the overall magnetism, and weakening to disappear).

Permanent magnets, or permanent magnets, can be natural products, also known as natural magnets, or they can be artificially manufactured (the strongest magnet is a NdFeB magnet). It is a material with a wide hysteresis loop, high coercivity, high remanence, and can maintain constant magnetism once magnetized. It is also known as permanent magnet material and hard magnetic material.

In the application, the permanent magnet operates in the second quadrant demagnetization of the magnetic return after deep magnetic saturation and magnetization.

Permanent magnets are classified according to materials 1, alloy permanent magnet materials. Including rare earth permanent magnet materials (NdFeB, samarium cobalt, alnico 2) and ferrite permanent magnet materials.

A permanent magnet is a material that retains its magnetic properties for a long time, but under certain conditions, its magnetism will gradually weaken or disappear completely. If two permanent magnets with opposite n-poles are placed together, the magnetic fields between them will interact with each other, causing their magnetic properties to gradually weaken until they eventually disappear. The exact time it takes to disappear depends on a variety of factors, such as the material, size, shape, temperature, strength of the magnet, and so on.

In general, the magnetism of permanent magnets gradually decreases, but this process can take years or decades. If you want to accelerate the disappearance of the magnetic properties of permanent magnets, you can place them in an environment with high temperatures or high magnetic fields, which can accelerate the decay of magnetism.

Summary. Dear, hello, I am happy to serve you, here for you to inquire about the permanent magnet refers to the action of the external magnetic field, can produce stable magnetic iron parts. The magnetism in a permanent magnet does not fade over time like other iron parts.

Therefore, the magnetism of the permanent magnet does not disappear naturally. However, if it is subjected to extremely strong heat or a strong magnetic field, it may cause the magnetism to weaken or disappear.

Dear, hello, I am happy to serve you, here for you to inquire about the permanent magnet refers to the action of the external magnetic field, can produce stable magnetic iron parts. The magnetism in a permanent magnet does not fade over time like other iron parts. Therefore, the magnetism of the permanent magnet does not disappear naturally.

However, if it is affected by a strong thermal deficit or a strong magnetic field, the loss of the energy of the jujube can cause the weakening or disappearance of magnetism.

In fact, the magnetism of permanent magnets does not disappear naturally because they are made of highly coercive magnetic materials and have been magnetized during the manufacturing process. However, if it is subjected to extremely strong heat or a strong magnetic field, it may cause the magnetism to weaken or disappear. If it is not affected by these effects, the magnetic properties of the permanent magnet will be maintained, so there is no need to worry about the loss of magnetic residue.