Method for measuring macroscopic texture of high-magnetic induction oriented electrical steel

A high magnetic induction oriented, electrical steel technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of difficult processing of narrow strip samples, lack of statistics, size limitations, etc., to achieve intuitive display of results, true and reliable information , measure the effect of fast

Inactive Publication Date: 2014-12-24
STATE GRID CORP OF CHINA +2
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  • Application Information

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Problems solved by technology

[0003] In order to find out the corresponding relationship between the magnetic induction intensity of high magnetic induction oriented electrical steel (national standard GB2521-2008 requires B8≥1.88T) and the internal structure of the material, "Material Science Principles of Electrical Steel" (Mao Weimin, Yang Ping. Material Science of Electrical Steel Principle [M]. Beijing: Higher Education Press, 2013) uses the concept of orientation degree to express, which is defined as the area of ​​grains with crystal orientation deviation angle within 3°, 5° or 7° in the sample It accounts for the percentage of the total statistic grain area, where the deviation angle refers to the average value of the inclination angle of the direction of the grain relative to the rolling surface and the deviation angle of the rolling surface relative to RD, but it is difficult to pass the three-dimensional measurement of the grain Euler angles to calculate the deviation angle
Qiu Shengtao (Chinese invention patent 201310205545.1) and others used electron backscatter diffraction (EBSD) te

Method used

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  • Method for measuring macroscopic texture of high-magnetic induction oriented electrical steel
  • Method for measuring macroscopic texture of high-magnetic induction oriented electrical steel
  • Method for measuring macroscopic texture of high-magnetic induction oriented electrical steel

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Embodiment 1

[0040] Such as figure 1 As shown in ‐6, select 0.18mm high magnetic induction oriented electrical steel material, cut into 78 samples with a size of 14mm×24mm in total, and 77 samples according to the attached figure 1 Synthetic samples were made by the method in, and the remaining 1 piece was used as a comparative sample. Three incomplete polar figures of {110}, {200} and {112} on the planes where the synthetic samples RD and ND are located were measured by X-ray diffractometer, and the α angle and β angle were measured in steps of 5° The diffraction intensity was recorded at intervals, and the orientation distribution function was calculated by the series expansion method. Convert the side data of the synthetic sample into the information of the rolled surface of oriented silicon steel (the plane where TD and RD are located), and rotate the initial pole figure data 90° around the RD direction through mathematical transformation to obtain the macroscopic texture of oriented ...

Embodiment 2

[0041] Example 2: Select 0.30mm specification high magnetic induction oriented electrical steel material, cut into 47 samples with a size of 14mm × 24mm in total, 46 of which are according to the attached figure 1Synthetic samples were made by the method in, and the remaining 1 piece was used as a comparative sample. Three incomplete polar figures of {110}, {200} and {112} on the planes where the synthetic samples RD and ND are located were measured by X-ray diffractometer, and the α angle and β angle were measured in steps of 3° The diffraction intensity was recorded at intervals, and the orientation distribution function was calculated by the series expansion method. The side data of the synthetic samples were converted into the information of the rolled surface of grain-oriented silicon steel (the plane where TD and RD are located), and the initial pole figure data was rotated 90° around the RD direction through mathematical transformation to obtain the macroscopic texture....

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Abstract

The invention relates to a method for measuring macroscopic texture of high-magnetic induction oriented electrical steel, which is applicable to detection of the high-magnetic induction oriented electrical steel with the average sample grain size of above 10mm. The method comprises the following steps: acquiring a synthetic sample and a contrast sample; measuring an incomplete pole figure of the synthetic sample and determining an orientation distribution function; obtaining the macroscopic texture of the high-magnetic induction oriented electrical steel. Through reasonable distribution of the samples and mathematical transformation, the representativeness of a result and the working efficiency can be significantly improved, so that the method can be widely applicable to the fields of production and research of the high-magnetic induction oriented electrical steel for an electrical transformer.

Description

Technical field: [0001] The invention relates to a method for measuring macroscopic texture, and more particularly relates to a method for measuring macroscopic texture of high magnetic induction oriented electrical steel. Background technique: [0002] In power systems, high-voltage large-scale power transformers generally use high-inductance oriented electrical steel laminations to make cores. The magnetic performance level of oriented electrical steel is directly related to the volume and loss of transformer cores. Determining the macroscopic texture of silicon steel sheets can be used The magnetic properties of the sample, especially the magnetic induction of the sample, can be reflected from the structural information inside the material. In oriented electrical steel as a face-centered cubic fcc metal, the common feature of {100}<001> cubic texture and {110}<001> Gaussian texture is the <001> direction which is easy to conduct magnetism, which is benef...

Claims

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Application Information

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IPC IPC(8): G01N23/207
Inventor 程灵马光杨富尧吴雪高洁韩钰陈新
Owner STATE GRID CORP OF CHINA
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