System and method for simultaneous observation of grains and magnetic domains of grain-oriented silicon steel

Abstract

The invention discloses a system and method for simultaneously observing oriented silicon steel crystalline grains and magnetic domains. A magnet yoke is formed by integrally molding a horizontal magnet yoke part, a left side vertical magnet yoke part and a right side vertical magnet yoke part, the horizontal magnet yoke part is wound with a magnet yoke body conductive wire, a DC voltage stabilizing power supply is used for powering the magnet yoke body conductive wire, an area formed by inner sides of the left side vertical magnet yoke part and right side vertical magnet yoke part as well asthe top of the horizontal magnet yoke part is a sample storage area, an oriented silicon steel sample can be arranged in the sample storage area, a magnetic fluid disc is arranged on the upper part ofthe oriented silicon steel sample, a power output end of an external power supply is connected with the input end of the voltage stabilizer, the output end of the voltage stabilizer is connected withan annular conductive wire of the magnetic fluid disc, the magnetic fluid disc provides a magnetic field along a normal of the silicon steel sample, and the magnet yoke provides a magnetic field along a rolling direction of the silicon steel sample. By adopting the system and method for simultaneously observing the oriented silicon steel crystalline grains and magnetic domains, the simultaneous observation of the oriented silicon steel crystalline grains and magnetic domains can be realized by virtue of a powder-pattern method.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a system and method for realizing simultaneous observation of oriented silicon steel grains and magnetic domains. Background technique [0002] Oriented silicon steel sheets are used as transformer cores and are indispensable and important soft magnetic alloys in electric power, electronics and military industries. With the development of the national economy, a large number of new or reconstructed power grid projects are implemented, and the demand for oriented silicon steel is increasing. With the increasingly prominent energy problems, the market demand for low-loss high-end oriented silicon steel is increasingly strong. The loss of oriented silicon steel is mainly composed of three parts: hysteresis loss, classical eddy current loss and abnormal eddy current loss. The hysteresis loss mainly depends on the degree of orientation. Under the same thickness, the cl...

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Problems solved by technology

The advantage of the above method is that the crystal grains can be clearly observed. The disadvantages are that it is time-consuming, the second is not conducive to environmental protection, and the third is that the surface of the sample is damaged.

[0005] At present, although there are relatively mature methods for observing grains and magnetic domains of grain-oriented silicon steel, there is no method that can realize simultaneous observation of grains and magnetic domains, and the magnetic properties of grain-oriented silicon steel are not only related to the size and shape of grains , is also related to the magnetic domain structure

[0006] The main problems existing in the existing oriented silicon steel grain and magnetic domain observation methods are: using the pickling method to observe the grain on the one hand, the sample preparation process is complicated, and it is not conducive to environmental protection, and in addition, the material needs to be destroyed; Only grains can be observed

The existing magnetic domain observation methods include: magnetic force microscope, transmission electron microscope, neutron scattering microscope, magneto-optical Kerr effect method and Bitter method. The first three can only be used for microscopic observation. For the magnetic domain of oriented silicon steel products, magnetic Optical Kerr effect method and Bitter method, but both can only observe magnetic domains, and cannot observe grains at the same time

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