Method for enhancing X-ray diffraction intensity of surface oxide layer of steel

A technique for diffraction intensity and steel surface, applied in material analysis using radiation diffraction, material analysis using wave/particle radiation, measuring devices, etc., can solve the problem of weak diffraction peaks of the oxide layer, difficulties in measuring and characterization of the oxide scale structure, etc. problem, to achieve the effect of increasing the diffraction intensity, weakening the matrix diffraction intensity, and enhancing the X-ray diffraction intensity

Inactive Publication Date: 2016-06-15
HEBEI IRON AND STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong penetrating ability of X-rays, the diffraction peak of Fe will appear in the diffraction pattern, and the diffraction peak of the oxide layer is usually weak, which causes certain difficulties to the structure measurement and characterization of the oxide scale.

Method used

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  • Method for enhancing X-ray diffraction intensity of surface oxide layer of steel
  • Method for enhancing X-ray diffraction intensity of surface oxide layer of steel
  • Method for enhancing X-ray diffraction intensity of surface oxide layer of steel

Examples

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Effect test

example 1

[0040] Example 1: Take a hot-rolled SPHC steel plate with a thickness of 3.0mm, prepare samples as required, control the sample size, and the surface is ground and polished to meet the requirements described in step 1. The surface of the hot-rolled plate is treated by a heating furnace, and the heated After heating the furnace to 820°C, put the sample into it, keep it warm for 5 minutes, take it out, and air-cool it to room temperature in a non-protective atmosphere to oxidize the surface of the sample to prepare a sample with an oxide layer.

[0041] The sample is measured at a grazing incidence angle of 3°, and the X-ray diffraction pattern is obtained figure 2 , the analysis is mainly Fe 3 o 4 and Fe 2 o 3 . with regular scan mode figure 1 For comparison of the diffraction patterns of figure 2 The diffraction intensity of the medium Fe matrix is ​​3700cps, 2300cps after deducting the background, and the strongest peak intensity of the oxide layer is 7020cps, 5620cps...

example 2

[0042] Example 2: Take a hot-rolled SPHC steel plate with a thickness of 3.0mm, prepare samples according to the requirements, control the sample size, grind and polish the surface, and process the surface of the hot-rolled plate through a heating furnace. After heating the furnace to 820°C, put Put the sample in, take it out after keeping it warm for 5 minutes, and air-cool it to room temperature without a protective atmosphere to oxidize the surface of the sample to prepare a sample with an oxide layer.

[0043] The sample is measured at a grazing incidence angle of 2°, and the X-ray diffraction pattern is obtained image 3 , the analysis is mainly Fe 3 o 4 and Fe 2 o 3 . with regular scan mode figure 1 For comparison of the diffraction patterns of image 3 The diffraction intensity of the medium Fe matrix is ​​2390cps, 940cps after deducting the background, and the strongest peak intensity of the oxide layer is 6440cps, 4990cps after deducting the background; figure ...

example 3

[0044] Example 3: Take a hot-rolled SPHC steel plate with a thickness of 3.0mm, prepare samples according to the requirements, control the sample size, grind and polish the surface, and process the surface of the hot-rolled plate through a heating furnace. After heating the furnace to 820°C, put Put the sample in, keep it warm for 5 minutes, take it out, and air-cool to room temperature in a non-protective atmosphere to oxidize the surface of the sample to prepare a sample with an oxide layer.

[0045] Measure the sample at a grazing incidence angle of 1.5° to obtain an X-ray diffraction pattern Figure 4 , the analysis is mainly Fe 3 o 4 and Fe 2 o 3 . with regular scan mode figure 1 For comparison of the diffraction patterns of Figure 4 The diffraction intensity of the medium Fe matrix is ​​1850cps, 350cps after deducting the background, and the strongest peak intensity of the oxide layer is 5960cps, 4460cps after deducting the background; figure 1 The diffraction in...

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Abstract

A method for enhancing the X-ray diffraction intensity of an oxide layer on a steel surface belongs to the technical field of X-ray diffraction methods, and is used for enhancing the diffraction intensity of an oxide layer on a steel surface by using X-ray grazing incidence. The technical solution is: to scan the steel plate with an oxide layer on the hot-rolled surface by means of grazing incidence of X-rays, and set the grazing incidence angles to 3°, 2° and 1.5°, and collect data. And use the conventional θ-2θ scanning mode to scan the phase, and the scanning time is the same. The comparison of the results of the two scanning methods shows that the diffraction intensity of the oxide layer increases significantly and the diffraction intensity of the matrix decreases significantly when the grazing incidence mode is used to analyze the oxide layer on the surface of the sample. The invention proposes a new method for enhancing the X-ray diffraction intensity of the oxide layer on the steel surface, which is an innovation in the analysis method of X-ray diffraction materials, and can effectively improve the diffraction count rate of the crystal structure of the oxide layer, improve the signal intensity, and prevent oxidation Structural measurements of the iron skin are more accurate.

Description

technical field [0001] The invention relates to a method for enhancing the diffraction intensity of an oxide layer on a steel surface by using X-ray grazing incidence, and belongs to the technical field of X-ray diffraction methods. Background technique [0002] The oxide scale on the surface of hot-rolled steel sheet has always been one of the important indicators for steel surface quality control. In recent years, the research on the oxide layer on the surface of hot-rolled sheet has become more and more in-depth. The composition and structure of the oxide layer of the hot-rolled sheet have a great influence on the corrosion resistance of the hot-rolled product. For the hot-rolled coils that continue to be cold-rolled, the composition and composition of the iron oxide layer will affect the pickling process and the phosphorus removal process during the heating process. In addition, the residue of iron oxide scale will also cause surface defects such as wrinkles and peeling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20
CPCG01N23/20G01N2223/0566
Inventor 薛峰海岩安治国崔会杰孙晓冉
Owner HEBEI IRON AND STEEL
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