Demagnetizers are generally used for demagnetization of permanent magnet materials (ALNICO, ferrite) and low coercivity materials (hardware, die steel, etc.), which can be divided into pulse demagnetization and AC demagnetization.

Demagnetization is to reduce the trajectory of the hysteresis loop when the workpiece is placed in the alternating amplitude. When the magnetic field strength drops to zero, the residual remanence Br in the workpiece is close to zero. The direction and magnitude of the current and magnetic field during demagnetization must be "commutated at the same time"

The demagnetizer is generally used for permanent magnet materials. When the demagnetization is to gradually reduce the amplitude of the workpiece in the alternating, the trajectory of the hysteresis loop is getting smaller and smaller. When the magnetic field strength drops to zero, the residual residue in the workpiece is left. Magnetic Br is close to zero. The direction and magnitude of the current and magnetic field during demagnetization must be "commutated at the same time"

After demagnetization treatment, the workpiece is completely free of magnetism, does not absorb other ferromagnetic substances, and is easy to clean; magnetic treatment can reduce residual stress and increase the life and surface effect of the workpiece.

Demagnetization treatment technology is a new non-heat treatment type metal material performance processing technology. It uses magnetic pulse processing technology to reduce internal residual stress of steel workpiece, change its dislocation structure and defect structure, and improve the overall mechanical performance of the workpiece.

The demagnetization treatment technology is a combination of electronics, ferromagnetism and metal materials, with high technology content.

The magnetically treated workpieces have significantly improved wear resistance, durability and fatigue resistance.

Litian demagnetizer is generally used for demagnetization of permanent magnet materials (ALNICO, ferrite) and low coercivity materials (hardware, die steel, etc.), which can be divided into pulse demagnetization and AC demagnetization.

Demagnetization principle

The two most important conditions for demagnetization:

(a) The magnetic poles overlap.

(b) The magnetic induction is decremented.

Method of overlapping magnetic poles

(a) The magnetizing current is AC;

(b) alternately changing the direction of the direct current;

(c) changing the direction of the test piece in the magnetic field

Decreasing magnetic field strength

(a) the test piece is gradually separated from the test piece by a magnetic field or a magnetic field;

(b) Controlled current decay or stepped down by power supply

There are various types and specifications of demagnetizers and degaussers on the market, and the effects of demagnetization are different.