Alnico permanent magnet, how much do you know?
As for the alnico magnet, I think many friends have never heard of it. The main reason is that this kind of magnet is relatively little involved in our daily life and we don't know much about it. Today, this paper focuses on the advantages and disadvantages of Al-Ni-Co magnet, its classification, application, Machinable shape, antidemagnetization and it. Performance brand list.
Let's start with its characteristics. It's an alloy made of aluminum, nickel, cobalt, iron and other trace metal elements. It has the characteristics of high energy, high induction, high residual flux density, good corrosion resistance and high temperature resistance.
What kinds of Al-Ni-Co permanent magnets are there?
It can be divided into two main categories: cast Al-Ni-Co and sintered Al-Ni-Co. The shape of cast Al-Ni-Co magnets can be diversified and complicated. The mechanical dimension tolerance of sintered Al-Ni-Co can be controlled more accurately.
Next, we will talk about their applications. Cast Al-Ni-Co products are mainly used in automotive parts, instruments, electroacoustics, motors, teaching, aerospace, military and other fields.
Sintered Al-Ni-Co is widely used in electrical machinery (now gradually replaced) instruments, communications, magnetoelectric switches and various sensors.
What shapes can Al-Ni-Co magnets be processed into?
The shapes that can be produced are cylindrical, circular, cuboid, flat, tile and horseshoe.
How do AlNi-Co permanent magnets generally be processed and manufactured?
Aluminum, nickel and cobalt permanent magnets have low mechanical strength, high hardness, brittleness and poor machinability. They can only be processed by a small amount of grinding or EDM, and can not be processed by forging or other mechanical processes.
Aluminum, nickel and cobalt have all the advantages. Let's see what are the disadvantages of Aluminum, Nickel and Cobalt.
The intrinsic coercivity of Al-Ni-Co is very low, usually less than 160 kA/m. The demagnetization curve of Al-Ni-Co permanent magnet is a non-linear change, and the recovery line of Al-Ni-Co permanent magnet does not coincide with the demagnetization curve. Therefore, special attention should be paid to its particularity in the design and manufacture of the device magnetic circuit, and the permanent magnet must be stabilized beforehand. According to the low coercivity of Al-Ni-Co permanent magnet, it is strictly forbidden to contact any ferromagnetic material in the course of use, so as to avoid local irreversible demagnetization or distortion of flux density distribution. In addition, in order to enhance its anti-demagnetization ability, Al-Ni-Co permanent magnet poles are often designed to grow into cylinders or rods.
What is the density of alnico magnet?
The density of Al-Ni-Co magnet is about 7.0-7.3g/cm3.
Finally, let's take a look at the performance brand list of Al-Ni-Co materials.