Many people have never heard of Al-Ni-Co in magnets. The main reason is that involves relatively little, contact less in our daily life,natural understanding is not much. Here we introduce the advantages and disadvantages of AlNiCo magnets, the classification, application, processing shape, demagnetization resistance and its performance brand table
Let's talk about its characteristics first. It is an alloy composed 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 AlNiCo permanent magnets are there?
It can be divided into cast Al-Ni-Co magnets and sintered Al-Ni-Co magnets. The shape of cast AlNiCo magnets can be diversified and complicated. The mechanical dimension tolerance of sintered AlNiCo can be controlled more accurately.
What are the applications of Al-Ni-Co magnets?
Let's talk about their applications. Cast Al-Ni-Co products are mainly used in automotive parts, instrumentation, electroacoustic, electrical machinery, teaching and Aerospace Military and other fields. Sintered Al-Ni-Co is widely used in motor (now gradually replaced) instrumentation, communication, magnetoelectric switch and various sensors.
What shapes can AlNiCo magnets be processed into?
It can be produced in cylindrical, circular, rectangular, disc, tile, horseshoe shape.
How to process Al-Ni-Co permanent magnets materials?
Al-Ni-Co permanent magnets material has low mechanical strength, high hardness, brittleness and poor machinability. Only a small amount of grinding or EDM can be carried out during machining, and forging and other machining can not be used.
What are the advantages of alnico permanent magnets?
It has the advantages of high remanence (up to 1.35t) and low temperature coefficient. When the temperature coefficient is - 0.02% ℃, the maximum temperature can reach 520 ℃.
What are its disadvantages of AlNiCo permanent magnets?
The intrinsic coercivity of alnico is very low, usually less than 160 kA / m. its demagnetization curve is nonlinear, and the recovery line of alnico permanent magnets does not coincide with the demagnetization curve. Therefore, special attention should be paid to the particularity of the device magnetic circuit design and manufacture, and the permanent magnets must be stabilized in advance.According to the low coercivity of Al Ni Co permanent magnet, it is strictly forbidden to contact with any ferromagnetic material in the process of use, so as to avoid local irreversible demagnetization or distortion of magnetic flux density distribution. In addition, in order to enhance its anti demagnetization ability, alnico permanent magnets pole surface is often designed with long cylinder or rod shape