Device for rapidly measuring grain size and magnetic domain wall width of oriented silicon steel sheet

Abstract

The invention discloses a device for rapidly measuring the grain size and magnetic domain wall width of an oriented silicon steel sheet. The device comprises a sample platform and a developing component, wherein the developing component comprises a display window and a contact layer; the display window is a transparent glass plate or a transparent hard plastic plate; a liquid storage cavity used for containing a developing suspension liquid is formed between the display window and the contact layer; the display window is provided with a suspension liquid injection hole used for injecting the developing suspension liquid into the liquid storage cavity and a liquid storage cavity closed hole used for balancing the internal pressure of the liquid storage cavity; the suspension liquid injection hole and the liquid storage cavity closed hole can be opened or closed as needed; a magnet yoke is arranged in the sample platform and is provided with a magnetizing winding; after being electrified, the magnetizing winding is capable of magnetizing the oriented silicon steel sheet put on the sample platform. By virtue of adopting the powder pattern method theory, the device is capable of rapidly measuring the grain size and magnetic domain wall width of the oriented silicon steel sheet.

Description

technical field [0001] The invention relates to an analysis and detection device for an oriented silicon steel sheet, in particular to a device for rapidly measuring the grain size and the width of a magnetic domain wall of an oriented silicon steel sheet. Background technique [0002] Silicon steel is a very important functional metal material, especially grain-oriented silicon steel, which has always been known for its complicated preparation process and high technical requirements. The loss of grain-oriented silicon steel is one of the core performance evaluation bases. [0003] Long-term studies have found that the loss of grain-oriented silicon steel is closely related to its grain size and magnetic domain wall width. If the grain size is too small, the grain boundaries will increase relatively, and the hysteresis loss will increase significantly during the repeated magnetization process. However, if the grain size is too large, the domain wall motion speed will increa...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned device mainly has the following disadvantages: ①The sample size is limited, and only smaller samples can be observed, while the grain changes of grain-oriented silicon steel are relatively complicated, and it is difficult for small-sized samples to represent the actual situation of large-sized samples; ② The observation suspension is in direct contact with the sample, and it cannot be reused after use, which is wasteful, and it takes time and effort to repeatedly configure the suspension; ③ Due to the intermediate magnetic field formed by the double-sided winding, the magnetic field at the center is more complicated

Images