A method for measuring the degree of orientation of grain-oriented silicon steel

Abstract

The invention discloses a method for determining the orientation degree of oriented silicon steel. The method comprises the following steps: step one, cutting a steel plate into a plurality of rectangular narrow strips, and stacking the rectangular narrow strips to form a combined sample, wherein a face to be detected of the combined sample consists of cross sections, vertical to the rolling direction, of the rectangular narrow strips; step two, measuring the crystal axis density of crystal grains (uvw) of the face to be detected by an X-ray diffraction instrument; step three, substituting the measured crystal axis density of the crystal grains (uvw) of the face to be detected into the formula, G=P[001] / sigma P[uvw], to calculate the orientation degree of the combined sample (2), wherein G is the orientation degree of the combined sample, and P[001] and P[uvw] are crystal axis densities of the measured crystal grains (001) and other crystal grains (vuw) respectively. Compared with the prior art, the method has the advantages in statistical significance, greatly improves the working efficiency, and can be widely applied to the production and research fields of oriented silicon steel.

Description

technical field [0001] The invention relates to the field of production and research of grain-oriented silicon steel, in particular to a method for measuring the degree of orientation of grain-oriented silicon steel. Background technique [0002] In order to evaluate the texture of grain-oriented silicon steel, people put forward the concept of orientation degree. However, the concept of orientation degree is not familiar to all practitioners. For example, some works define the average deviation angle of grain relative to the most easily magnetized direction <001> as the orientation degree of grain-oriented silicon steel, namely [0003] g=(α+β) / 2 (1) [0004] Among them, g is the orientation degree of grain-oriented silicon steel, α is the deviation angle of <001> crystal direction on the rolling surface relative to the rolling direction, and β is the inclination angle of the <001> crystal direction relative to the rolling surface. [0005] However, this...

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Problems solved by technology

[0009] According to the conventional method, using the deviation angle as a parameter to measure the orientation degree of a sample, first use the metallographic corrosion pit method (early) or the EBSD (Electron Back-Scattered Diffraction) method (recent) Measured {hkl} (indices of crystallographic plane) of more than one hundred grains (crystal orientation index, orientation index) and the area of ​​more than one hundred grains, and then use {hkl} The relationship with calculates the α and β values ​​of each grain, and finally calculates the percentage of the area-weighted {110} texture—orientation degree. It takes about tens of hours before and after, and the efficiency is extremely high. Low

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