Method of electrolytically extracting and detecting fine inclusions in steel

An electrolytic extraction and inclusion technology, applied in the field of metal physics research, can solve the problems of inability to extract and separate fine non-metallic inclusions, accurate detection, etc., achieve good electron microscope observation effect, avoid loss, and facilitate operation

Active Publication Date: 2012-12-12
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that the traditional method cannot extract and separate the nano-scale fine non-metallic inclusions in steel intact and accurately detect them

Method used

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  • Method of electrolytically extracting and detecting fine inclusions in steel
  • Method of electrolytically extracting and detecting fine inclusions in steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Organic electrolyte electrolysis

[0034] Prepare organic electrolyte, the formula of electrolyte is as follows: (wt%)

[0035] Tetramethylammonium chloride 1%, acetylacetone 15%, the balance is anhydrous methanol.

[0036] Put the above electrolytic solution into the electrolytic cell 3, use the pipeline steel X70 steel sample containing inclusions as the anode, and the stainless steel cylinder 2 as the negative electrode, and put the electrolytic cell into the refrigerator, press figure 1 Connect the experimental device as shown to perform constant current electrolysis on the steel sample, control the electrolysis temperature in the refrigerator to -15°C, and adjust the current density to 0.05A / cm 2 , electrolysis for 4 hours.

[0037] 2. Magnetic separation

[0038] Clean the electrolyte containing inclusions after electrolysis with absolute ethanol, and perform magnetic separation with a magnet to suck out the iron particles and cementite mixed in inclusions t...

Embodiment 2

[0048] 1. Organic electrolyte electrolysis

[0049] Prepare organic electrolyte, the formula of electrolyte is as follows: (wt%)

[0050] Tetramethylammonium chloride 1%, acetylacetone 10%, the balance is anhydrous methanol.

[0051] Put the above electrolytic solution into the electrolytic cell 3, use the H40 steel sample containing inclusions as the anode, and the stainless steel cylinder 2 as the negative electrode, and put the electrolytic cell into the refrigerator, press figure 1 Connect the experimental device as shown to perform constant current electrolysis on the steel sample, control the electrolysis temperature in the refrigerator to -15°C, and adjust the current density to 0.03A / cm 2 , electrolysis for 4 hours.

[0052] 2. Magnetic separation

[0053] Clean the electrolyte containing inclusions after electrolysis with absolute ethanol, and perform magnetic separation with a magnet to suck out the iron particles and cementite mixed in inclusions that fall off du...

Embodiment 3

[0063] 1. Organic electrolyte electrolysis

[0064] Prepare organic electrolyte, the formula of electrolyte is as follows: (wt%)

[0065] Tetramethylammonium chloride 1%, acetylacetone 10%, the balance is anhydrous methanol.

[0066] Put the above electrolytic solution into the electrolytic cell 3, use the S23 silicon steel sample containing inclusions as the anode, and the stainless steel cylinder 2 as the negative electrode, and put the electrolytic cell into the refrigerator, press figure 1 Connect the experimental device as shown to perform constant current electrolysis on the steel sample, control the electrolysis temperature in the refrigerator to -15°C, and adjust the current density to 0.05A / cm 2 , electrolysis for 3 hours.

[0067] 2. Magnetic separation

[0068] Clean the electrolyte containing inclusions after electrolysis with absolute ethanol, and perform magnetic separation with a magnet to suck out the iron particles and cementite mixed in inclusions that fal...

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Abstract

The invention discloses a method of electrolytically extracting and detecting fine inclusions in steel, belonging to the technical field of metal physical research methods. The method comprises the following technical steps of: using an organic electrolyte to carry out electrolysis on a steel sample; after electrolysis, washing the electrolyte mixed with the inclusions by absolute ethyl alcohol, and carrying out magnetic separation on the electrolyte by a magnet; separating the electrolyte after magnetic separation and collecting the inclusions by adopting a method of centrifugation by a centrifugal machine; putting the collected inclusions into a solvent easy to volatilize, carrying out ultrasonic dispersion on the inclusions by an ultrasonic cleaner, and then dripping a solution after ultrasonic dispersion on a carrier drop by drop by a trace pipette; and after the solvent volatilizes, putting the carrier which is distributed with the inclusions into a scanning electron microscope to analyze. The method has the advantages that the fine inclusions can be extracted in an undamaged way, the obtained inclusions are good in dispersion under a field of view of the scanning electron microscope, the shapes of the inclusions are perfect, and a good space statistic analysis result can be obtained so as to supply accurate data for a product.

Description

technical field [0001] The invention belongs to the technical field of metal physics research methods. In particular, it relates to a method for electrolytically extracting and detecting fine inclusions in steel. Background technique [0002] The performance of steel depends to a certain extent on the composition, shape and size and quantity distribution of inclusions in steel. Inclusions in steel are usually diverse. The size of the inclusion particles varies, the large particle size may exceed 20um, and the small particle size may be below 50nm. The chemical compositions of inclusions of different sizes are also inconsistent. These inclusions with different particle sizes and chemical compositions play different roles in different steels. In order to comprehensively and deeply study the influence of inclusions on the properties of steel, it is necessary to extract these inclusions of various sizes from the steel without damage, and accurately analyze their composition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/32G01N33/20C25F3/06
Inventor 邢阳鞠新华刘卫平杨瑞
Owner SHOUGANG CORPORATION
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