Method for detecting orientation of large-sized crystal grains

A technology of grain orientation and detection method, applied in measurement devices, material analysis using radiation diffraction, material analysis using wave/particle radiation, etc., to achieve the effect of judgment

Active Publication Date: 2011-06-22
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 in the following examples.

[0023] In the embodiment, taking 3 batches of 5 pieces of finished GO120 oriented silicon steel as an example, the texture components of 15 pieces of finished oriented silicon steel are counted.

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

[0025] Since the texture of the finished oriented silicon steel mainly has three surface textures of {100}, {110} and {111} or can be reduced to the high index texture components of the three surface textures, only three surface textures are calculated. The specific surface energy of each surface, calculated according to the theoretical specific surface energy ...

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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 test method in the physical test field, and is particularly suitable for a method for detecting the orientation of large-size crystal grains. Background technique [0002] As we all know, the accuracy of the grain size, texture type, texture component content, and texture orientation of polycrystalline materials affects the mechanical and physical properties of the material, and is the key factor for judging the quality of the material. [0003] Texture, that is, the combination of crystal grain orientation and crystal grain geometric size, can provide theoretical guidance for the preparation of materials. Therefore, it is required to detect the grain orientation quickly and in batches under the condition that the grain morphology and the grain orientation are combined. [0004] X-ray diffraction method is used to measure crystal texture, usually measuring three incomplete pole figures, and then calculating ODF, which can characteriz...

Claims

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Application Information

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Patent Type & Authority Applications(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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