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Method for detecting orientation of large-sized crystal grains

A technology of grain orientation and detection method, which is applied in the direction of measuring device, material analysis using radiation diffraction, material analysis using wave/particle radiation, etc., to achieve the effect of judgment

Active Publication Date: 2014-09-03
ANGANG STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no method of combining the two instruments for detection, so a method for detecting the orientation of large-scale grains is urgently needed, so as to realize the combination of grain morphology and grain orientation quickly and in batches

Method used

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  • Method for detecting orientation of large-sized crystal grains
  • Method for detecting orientation of large-sized crystal grains
  • Method for detecting orientation of large-sized crystal grains

Examples

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Embodiment Construction

[0022] The present invention will be further described below by way of examples.

[0023] Example, taking 3 batches of 5 finished GO120 grain-oriented silicon steels as an example, count the texture components of 15 finished grain-oriented silicon steels.

[0024] Establishment of the database: each batch of finished GO120 grain-oriented silicon steel, take one sample each, use a grinder to remove the insulating layer on the two surface layers of the sample, both surface roughness is 1um, and then make it 180mm (length) × 120mm (width) Specifications, where the length direction is the rolling direction.

[0025] Since the texture of finished grain-oriented silicon steel mainly has three plane textures {100}, {110} and {111} or high-index texture components that can be reduced to these three plane textures, only three plane textures are calculated. The specific surface energy of a surface, according to the theoretical calculation of the specific surface energy γ (110) =2.92J / ...

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Abstract

The invention discloses a method for detecting orientation of large-sized crystal grains. The method mainly comprises the following steps of: establishing and storing a database; combining the colors of the crystal grains and crystallographic data by an electron backscatter diffraction pattern (EBSP) technology; establishing the correspondence between the colors and the crystallographic data; recording corrosion conditions of different metal materials and differently-oriented crystal grains; quickly retrieving the database to search a corrosion state after a large number of samples to be detected are obtained; corroding according to the same corrosion mode; and recording the colors of the crystal grains corresponding to the orientation, which accords with the conditions, of the database under the conditions of the same light source and the same viewing angle to finally realize quick and batch orientation detection of the crystal grains. In the method, the specific color of the differently-oriented crystal grains is obtained through observation under fixed conditions by quantitatively calculating the surface energy of the crystal grain orientation and proper corrosion time, and quick and batch orientation detection of a large-sized polycrystalline material is realized corresponding to the scanning of the database so as to determine the performance of the material.

Description

technical field [0001] The invention relates to a testing method in the field of physical testing, and is especially suitable for detecting the orientation of large-scale crystal grains. Background technique [0002] It is well known that the grain size, texture type, texture component content and texture orientation of polycrystalline materials are accurate or not, which affect the mechanical and physical properties of the material, and are the key factors to judge whether the material performance is good or bad. [0003] Texture, that is, the combination of grain orientation and grain geometry size, can provide theoretical guidance for the preparation of materials. Therefore, it is required to realize the combination of grain morphology and grain orientation to detect grain orientation quickly and in batches. [0004] The X-ray diffraction method measures the crystal texture, usually measuring three incomplete pole figures, and then calculating the ODF, which can characte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/20G01N23/203
Inventor 蒋奇武金文旭张海利付勇军游清雷张静庞树芳
Owner ANGANG STEEL CO LTD
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