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Method for preparing sample for low-carbon steel EBSD analysis

A low-carbon steel and sample technology, which is applied in the field of low-carbon steel EBSD sample preparation, can solve the problems of difficulty in mastering the success rate and heavy workload, and achieve the effect of simple operation and high resolution

Inactive Publication Date: 2017-06-13
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ideal EBSD samples can be prepared by electropolishing, but the workload is heavy and the success rate is difficult to grasp

Method used

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  • Method for preparing sample for low-carbon steel EBSD analysis
  • Method for preparing sample for low-carbon steel EBSD analysis
  • Method for preparing sample for low-carbon steel EBSD analysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of low carbon steel EBSD analysis sample, comprises the following steps:

[0031] (1) Sample interception: Use a wire cutting machine to process the low-carbon steel into a sample with a size of 6mm×8mm×8mm, and use a grinder to grind the surface of the sample to be tested;

[0032] (2) Grinding: Polish the sample with 400#, 800#, 1200# silicon carbide water sandpaper. The grinding time is 2 minutes each time with different numbers of sandpaper. The sample should be rotated in the same direction every time the sandpaper is changed. 90 degrees, to grind off the scratches left by the previous grade of sandpaper, and use water as a lubricant and coolant during the polishing process;

[0033] (3) Cleaning: Clean the ground sample with absolute ethanol, and dry it with the cold air of a hair dryer;

[0034] (4) Argon ion beam polishing: Use a high-energy argon ion beam to polish the surface of the sample to be tested. The energy of the argon ion...

Embodiment 2

[0038] The invention provides a kind of preparation method of low carbon steel EBSD sample, comprises the following steps:

[0039] (1) Sample interception: Use a wire cutting machine to process a low-carbon steel sample with a size of 8mm×8mm×8mm, and use a grinder to grind the surface of the sample to be tested;

[0040] (2) Polishing: Polish the sample with 400#, 800#, 1200# silicon carbide water sandpaper, each time with different numbers of sandpaper for 4 minutes, and rotate the sample in the same direction every time the sandpaper is changed 90 degrees, to grind off the scratches left by the previous grade of sandpaper, and use water as a lubricant and coolant during the polishing process;

[0041] (3) Cleaning: Clean the ground sample with absolute ethanol, and dry it with the cold air of a hair dryer;

[0042] (4) Argon ion beam polishing: Polish the surface of the sample to be tested with a high-energy argon ion beam. The energy of the argon ion beam is 4.1KeV. The...

Embodiment 3

[0046] The invention provides a kind of preparation method of low carbon steel EBSD sample, comprises the following steps:

[0047] (1) Sample interception: Use a wire cutting machine to process a low-carbon steel sample with a size of 7mm×8mm×8mm, and use a grinder to grind the surface of the sample to be tested;

[0048] (2) Polishing: Polish the sample with 400#, 800#, 1200# silicon carbide water sandpaper. The grinding time is 3 minutes each time with different numbers of sandpaper, and each time the sandpaper is changed, the sample should be rotated 90 degrees in the same direction to remove the scratches left by the previous number of sandpaper, and use water as a lubricant during the polishing process and coolant;

[0049] (3) Cleaning: Clean the ground sample with absolute ethanol, and dry it with the cold air of a hair dryer;

[0050] (4) Argon ion beam polishing: Use a high-energy argon ion beam to polish the surface of the sample to be tested. The energy of the ar...

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Abstract

The invention discloses a method for preparing a sample for low-carbon steel EBSD analysis. The method includes the steps that 1, a test specimen is intercepted, wherein the face to be tested of the intercepted test specimen is grinded flat by a grinding machine; 2, the test specimen is burnished, wherein 400# silicon carbide waterproof abrasive paper, 800# silicon carbide waterproof abrasive paper and 1200# silicon carbide waterproof abrasive paper are used in sequence for burnishing the test specimen; 3, the test specimen is washed, wherein the test specimen is washed by absolute ethyl alcohol and dried by cold air; 4, argon-ion beams conduct polishing, wherein the high-energy argon-ion beams are adopted to bombard the face to be tested of the test specimen for 40-120 minutes to conduct polishing, and the sample for the low-carbon steel EBSD analysis is obtained. According to the method, mechanical polishing or electrolytic polishing is not needed, a destressing corrosive liquid is not needed, and in the whole sample preparation process, the usage of acid chemical agents is avoided, so that the method is safe and environmentally friendly. By the adoption of the method, the obtained sample for the low-carbon steel EBSD analysis is extremely high in desorption rate, the sample calibration rate reaches 92-99%, and the sample meets the EBSD analysis requirements.

Description

technical field [0001] The invention belongs to the technical field of iron and steel analysis, and in particular relates to a method for preparing a low-carbon steel EBSD sample. Background technique [0002] Electron Backscatter Diffraction (EBSD) technology is under the scanning electron microscope, the electron beam excites and forms the diffraction Kikuchi band pattern in the surface area of ​​the sample inclined at a large angle, so as to determine the relevant information of the crystal structure, orientation and grain boundary characteristics. [0003] In the process of EBSD data acquisition, the surface state of the sample has a great influence on the process of EBSD data acquisition. The surface of the EBSD sample is required to be flat, clean, and free of residual stress. To achieve such a state, the sample preparation process has certain difficulties. The traditional sample preparation method of mechanical polishing and corrosion cannot effectively remove the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/04G01N1/32G01N1/34
Inventor 安治国薛峰熊自柳侯环宇赵燕青
Owner HEBEI IRON AND STEEL
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