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A Method for Characterizing the Crystal Structure of Non-metallic Inclusions in Steel Using Micro-area X-ray Diffraction

A technology of non-metallic inclusions and crystal structure, applied in the field of detection and analysis, can solve the problems of unsatisfactory X-ray diffraction detection effect and difficult sample preparation, and achieve the effect of high degree of convergence, small distribution area and improved accuracy

Active Publication Date: 2021-09-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The object of the present invention is to provide a method for characterizing the crystal structure of non-metallic inclusions in steel by micro-area X-ray diffraction (Micro-XRD), by preparing high-quality non-metallic inclusion powder samples in steel and setting reasonable detection parameters , to solve the existing technical problems such as difficult sample preparation and unsatisfactory detection results of X-ray diffraction (XRD)

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  • A Method for Characterizing the Crystal Structure of Non-metallic Inclusions in Steel Using Micro-area X-ray Diffraction
  • A Method for Characterizing the Crystal Structure of Non-metallic Inclusions in Steel Using Micro-area X-ray Diffraction
  • A Method for Characterizing the Crystal Structure of Non-metallic Inclusions in Steel Using Micro-area X-ray Diffraction

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Embodiment 1

[0034] The method for characterizing the crystal structure of non-metallic inclusions in ultra-low carbon steel A in this embodiment, the specific steps are as follows:

[0035] Step 1. Non-destructive extraction of non-metallic inclusions in steel

[0036] After the steel matrix is ​​eroded by the electrolysis method of organic electrolyte, the anode slime (anode slime refers to the mud-like substance attached to the surface of the anode sample and deposited on the bottom of the electrolytic cell during the electrolysis process) and the anode sample are put into a 40ml container In a 50ml beaker of ethanol, conduct ultrasonic treatment for 5 minutes to obtain a solution containing non-metallic inclusion particles, pour the solution in the beaker into a watch glass 5ml, and then add ethanol to the watch glass so that the amount of solution inside the watch glass does not exceed the surface 2 / 3 of the diameter of the dish, the diameter of the watch dish in step 1 is 130mm.

[...

Embodiment 2

[0045] The basic steps of the method for characterizing the crystal structure of non-metallic inclusions in high carbon steel B in this embodiment are the same as those in Embodiment 1, except that the electrolysis time in step 1 is 3-6 hours. In step 2, the watch glass is made to perform a circular motion at a rotational speed of 0.25-0.75 rad / s with the midpoint of the bottom of the watch glass as the center of rotation, and the amplitude range is 4-7 mm. In step 3, after the above operations, the following operations need to be added: tilt the watch glass horizontally by 3 to 7 degrees, perform a circular motion with a speed of 0.75 to 1rad / s, the amplitude range is 4 to 6mm, and the time is 3 to 5min. Bottom of the watch glass to ensure an even spread of particles.

[0046] As shown in Figure 1(a)-(b), the extraction method of the present invention can ensure non-destructive extraction and obtain sufficient, high-purity, and non-metallic inclusion particles in steel with a...

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Abstract

The invention relates to the technical field of detection and analysis, and specifically refers to a method for characterizing the crystal structure of non-metallic inclusions in steel by using micro X-ray diffraction (Micro-XRD). This method extracts non-metallic inclusions in steel by electrolysis or acid solution, and gathers, purifies, and prepares samples to obtain high-quality micro-area X-ray diffraction detection samples. Through micro-area X-ray diffraction analysis, it can Determine the crystal structure of the test particle. The method of the invention can simply and effectively determine information such as the crystal structure, lattice parameters, and phase types of non-metallic inclusions in steel, by preparing high-quality powder samples of non-metallic inclusions in steel and setting reasonable micro-area X-ray diffraction Detection parameters to solve the existing technical problems such as difficult sample preparation and unsatisfactory X-ray diffraction (XRD) detection results.

Description

technical field [0001] The invention relates to the technical field of detection and analysis, in particular to a method for characterizing the crystal structure of non-metallic inclusions in steel by using micro-area X-ray diffraction (Micro-XRD). Background technique [0002] The properties of non-metallic inclusions in steel are closely related to the properties of steel materials. In the field of iron and steel metallurgy, methods such as reducing the number of inclusions in steel and modifying the type of inclusions are often used to reduce the harmful effects of inclusions in steel on materials. In the field of oxide metallurgy, fine inclusions are also used to improve the structure, promote the formation of acicular ferrite, and refine grains. At present, the main research methods for non-metallic inclusions in steel are to observe the morphology (scanning electron microscope or light microscope), determine the composition (EDS energy spectrum analysis or EPMA electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/20008G01N23/207
CPCG01N23/2005G01N23/207G01N2223/056G01N2223/1016G01N2223/624G01N2223/652
Inventor 刘洋李殿中王培张潇
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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