Magnetic annealing (magnetic annealing)

Here.Annealing (Normalizing)is classified as a process.Magnetic annealingIt is a note about.

Enhance the capabilities of magnetic materialsThis is what's being said about magnetic annealing. What kind of treatment is it, exactly? Today, I'll briefly note down what I've learned.

Magnetic annealing (magnetic annealing)

First, let me confirm. What is annealing in the first place?

A heat treatment process that involves heating and holding a material at its recrystallization temperature, followed by slow cooling. The purposes of this treatment are to relieve residual stress, soften the material, improve machinability, enhance cold formability, and adjust the crystal structure.

Magnetic annealing

Annealing performed on soft magnetic iron before use, in the case of soft magnetic iron.It can be used without annealing, but performance improves with annealing.

Also known as magnetic annealing.

Elements that change with magnetic annealing

The elements that change due to magnetic annealing are an increase in maximum relative permeability, a slight increase in maximum magnetic flux density, and the ability to achieve a higher magnetic flux density at the same magnetic field on the BH curve. Also, when magnetic annealing is performed, the coercivity is halved for S10C. This is a factor that must be carefully considered for its intended use.

What is holding power?

The strength of the magnetic field acting in the opposite direction required to bring the magnetism of the test material to zero.The lower the value, the better the magnetic permeability.To increase control, you need to choose something with low retention.For magnetic materials such as transformer cores, it is necessary to magnetize them strongly with a very weak magnetic field. Therefore, it is desirable to use materials with high permeability, or materials whose coercivity has been reduced to be as small as possible.

That's it.