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A method for measuring the texture of cold-rolled steel plate
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A technology of cold-rolled steel plate and measurement method, which is applied in the direction of measurement device, preparation of test samples, instruments, etc., and can solve problems such as inability to measure texture
Active Publication Date: 2020-05-26
SHOUGANG CORPORATION
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Problems solved by technology
[0004] The embodiment of the present application provides a method for measuring the texture of the cold-rolled steel plate, which solves the technical problem that the texture of the surface of the steel plate cannot be measured within a few microns in the prior art, and can measure the crystal orientation of the surface layer of the cold-rolled steel plate and the core Accurately measure the depth of textured micron-scale features
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Embodiment 1
[0031] In order to solve the above-mentioned technical problems, the present invention provides a method for measuring the texture of cold-rolled steel plates, including:
[0032] Step S1: Treat the surface of the cold-rolled steel plate to obtain the sample 1 to be tested;
[0033] Step S2: Carry out electron backscatter diffraction technology detection to the test sample 1, measure the ∥ND texture ratio within the range of the maximum orientation deviation of 20°, and obtain the result A;
[0034] Step S3: Carry out argon ion etching on the test sample 1 to obtain the test sample 2;
[0035] Step S4: detect the argon ion etching depth T on the surface of the test sample 2;
[0036] Step S5: Carry out electron backscatter diffraction technology detection to the test sample 2, measure the ∥ND texture ratio within the range of the maximum orientation deviation of 20°, and obtain the result B;
[0037] Step S6: Repeat Step S3-Step S5 until |B N When -A| / A≥50%, the final argon...
Embodiment 2
[0047] In this embodiment, the present invention is described in detail by taking DC04 continuous annealing steel plate as an example.
[0048] Step B1: First select the cold-rolled steel plate, and use the method of electrolytic polishing to treat the surface. The electrolyte used is a mixture of perchloric acid: alcohol: glycerol at a ratio of 7:2:1. After polishing, the surface of the sample is smooth The degree can meet the EBSD detection requirements, and the EBSD test sample 1 is obtained.
[0049] Step B2: Use a field emission scanning electron microscope and an EBSD probe to conduct Texturecomponent analysis on the EBSD sample 1 to be tested, and measure the ratio of the ∥ND silk texture. The maximum orientation deviation range is 20°, and the result A is obtained. The grain orientation imaging image of the surface texture of the test sample 1 detected by EBSD is as follows figure 1 shown.
[0050] Step B3: using a depth profiling ion gun to perform argon ion etching...
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Abstract
The invention discloses a cold-roll steel sheet texture measurement method which comprises the following steps: S1, treating the surface of a cold-roll steel sheet so as to obtain a test sample 1; S2,measuring the <111> / / ND texture ratio within the maximum orientation deviation of 20 degrees so as to obtain a result A; S3, performing argon ion etching on a test sample 1 to be tested so as to obtain a test sample 2 to be tested; S4, detecting a surface argon ion etching depth T of the test sample 2 to be tested; and S5, measuring a <111> / / ND texture ratio within the maximum orientation deviation of 20 degrees so as to obtain a result B, and repeating steps S3 to S5 till the quotient of the absolute value of BN-AN divided by AN is greater than or equal to 50%, thereby obtaining a final argon ion etching depth TN, that is, the depth of a cold-roll steel sheet surface texture. By adopting the method disclosed by the invention, the depth of a micro-grade characteristic texture of the surface layer of a cold-roll sheet that the crystal orientation has differences from that of the central part of the cold-roll sheet can be accurately measured.
Description
technical field [0001] The invention relates to the technical field of material testing, in particular to a method for measuring the texture of cold-rolled steel plates. Background technique [0002] Texture occurs when the orientations of individual grains of a polycrystalline material come together. The texture of cold-rolled steel sheet has a great influence on the deformation ability and deep-drawing performance of cold-rolled steel sheet, and it needs to be studied quantitatively. The texture of cold-rolled steel sheets is affected by processes such as hot-rolling, cold-rolling, and annealing processes, and there may be texture changes along the thickness of the plate, especially the texture type of the surface layer may be very different from that of the core, so Quantitative detection of the depth of the surface characteristic texture is required. [0003] At present, the commonly used methods for detecting texture are X-ray photoelectron spectroscopy and electron b...
Claims
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