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Multi-sample combination method for detecting crystal orientation distribution

A crystal orientation, multi-sample technology, applied in the field of multi-sample combination method for measuring crystal orientation distribution, can solve the problems of inability to use ODF software, high cost, inconvenient use, etc., and achieves strong representativeness, low cost, and convenient use. Effect

Inactive Publication Date: 2012-10-03
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires special preparation or purchase of ODF software for calculating the cross-section composed of dozens of samples. Conventional ODF software cannot be used, which is costly and inconvenient to use.

Method used

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  • Multi-sample combination method for detecting crystal orientation distribution
  • Multi-sample combination method for detecting crystal orientation distribution
  • Multi-sample combination method for detecting crystal orientation distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Sample: high magnetic induction oriented silicon steel-HIB steel; texture: Gaussian ({110}) texture.

[0047] According to the method of this patent and using conventional ODF software, the ODF cross-sectional diagrams of φ2=0 and 45 of the RD cross-section are shown in figure 2 , substituting the Euler angles of the four strong points on it into the formulas (a) and (b), the results are all {110} textures (it represents the Gaussian texture family, that is, the collection of each Gaussian texture) .

Embodiment 2

[0049] Sample: non-oriented silicon steel 50WW800; texture: {111} and {111}.

[0050] According to the method of this patent and the ODF cross-sectional view of φ2=0 and 45 obtained by using conventional ODF software, see image 3 , the results are also {111} and {111} textures.

[0051] The present invention is particularly effective for cases with strong, single textures. This method, like all other multi-specimen combination methods, is preferred for the analysis of large-grained samples. However, this method also has the advantage of being low cost compared to all other multi-sample combination methods.

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Abstract

The invention provides a multi-sample combination method for detecting crystal orientation distribution. The method comprises the following steps: (1) selecting a plurality of samples at different parts of a steel plate; (2) processing the samples into a plurality of rectangular steel sheets in the same specification, stacking the rectangular steel sheets in a pole figure measurement sample rack and fastening, polishing and corroding the rectangular steel sheets to form R.D section samples; (3) measuring three imperfect pole figures (110), (200) and (211) of the R.D section samples; (4) computing an ODF (Orientation Distribution Function) figure by utilizing the conventional ODF software and acquiring Phi, Phi1, and Phi2 of a Bung coordinate system or Theta, Phi and Psi of a Roe coordinate system; and (5) utilizing the formulas (a) and (b) of the Bung coordinate system or the formulas (c) and (d) of the Roe coordinate system to compute the texture. The multi-sample combination method can reflect the crystal orientation condition of the samples in the whole thickness and has strong representativeness; for a laboratory with conventional ODF analysis software, specially planning or purchasing ODF software for computing the cross sections combined by dozens of samples is not needed, so that the use is convenient; and for a laboratory without the ODF analysis software, the only requirement is to plan or purchase the conventional ODF software, so that the cost is lower.

Description

technical field [0001] The invention belongs to the technical field of texture measurement of metal plates, in particular to a multi-sample combination method for measuring crystal orientation distribution. Background technique [0002] Texture is the distribution of orientations of the majority of crystals in a polycrystalline material. Industry regulations: use {hkl} <uvw>to represent the texture of polycrystals or the orientation of single crystals, where {hkl} represents the crystallographic plane parallel to the rolling plane, <uvw>Indicates the crystallographic direction parallel to the rolling direction. [0003] Texture has an important influence on the properties of materials. For example, Gaussian texture {110}<001> and cubic texture {100}<001> are ideal textures for oriented electrical steel and non-oriented electrical steel, respectively, and γ-fiber The texture (<111> / / R.D.) is ideal for automotive panels. Studying the evoluti...

Claims

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Application Information

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IPC IPC(8): G01N33/20
Inventor 李长一黎世德杨佳欣
Owner WUHAN IRON & STEEL (GROUP) CORP
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