Method for performing electrolytic extraction on ultrafine carbide in steel

An electrolytic extraction and carbide technology, applied in the preparation of test samples, etc., can solve the problems of small size of ultrafine carbide, difficult non-destructive separation, carbide erosion, etc., and achieve the effect of simple and easy operation

Inactive Publication Date: 2018-01-12
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main difficulties are as follows: (1) Carbide is easily eroded by various media interfaces during the extraction process, and it is difficult to achieve non-destructive...

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  • Method for performing electrolytic extraction on ultrafine carbide in steel
  • Method for performing electrolytic extraction on ultrafine carbide in steel
  • Method for performing electrolytic extraction on ultrafine carbide in steel

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Embodiment 1

[0023] Embodiment 1: The method for electrolytic extraction of ultrafine carbides in steel adopts the following specific processes.

[0024] (1) The formula of the electrolyte is as follows (wt%): tetramethylammonium chloride 4%, acetylacetone 10%, ethylene glycol 5%, triethanolammonium 3%, and ethanol with a purity of 99.9% as the balance. Into a mixed solution; In addition, add 5g of diphenylguanidine and 10 grams of urethane pin in every liter of mixed solution by volume.

[0025] (2) Put the above electrolytic solution into the electrolytic cell; put the GCr15 steel sample containing carbides into the electrolytic cell after polishing and cleaning, as the anode; 316L stainless steel plate as the cathode; pass in argon gas with a flow rate of 0.3 liters / minutes; the temperature of the electrolyte is 0-3°C; adjust the electrolysis potential to 3.5V, and the current density is 0.045A / cm 2 , The electrolysis time is 28 hours.

[0026] (3) Put the above-mentioned electrolyte...

Embodiment 2

[0027] Embodiment 2: The method for electrolytically extracting ultrafine carbides in steel adopts the following specific processes.

[0028] (1) The formula of the electrolyte is as follows (wt%): tetramethylammonium chloride 3%, acetylacetone 12%, ethylene glycol 6%, triethanolammonium 2%, and ethanol with a purity of 99.9% as the balance. Into a mixed solution; In addition, add 5g of diphenylguanidine and 10 grams of urethane pin in every liter of mixed solution by volume.

[0029] (2) Put the 82A steel sample containing carbides into the electrolytic cell after polishing and cleaning, as the anode, and place it in the anode position in the middle of the electrolytic cell; the 316L stainless steel plate is used as the cathode; argon gas is introduced, and its flow rate is controlled to 0.8 liters / min; the temperature of the electrolyte is controlled by an ice bath to 0-3°C; the electrolytic potential is adjusted to 3.0V, and the DC current density is 0.035A / cm 2 , electro...

Embodiment 3

[0031] Embodiment 3: The method for electrolytic extraction of ultrafine carbides in steel adopts the following specific processes.

[0032] (1) The formula of the electrolyte is as follows (wt%): tetramethylammonium chloride 5%, acetylacetone 8%, ethylene glycol 3%, triethanolammonium 4%, and ethanol with a purity of 99.9% as the balance. Into a mixed solution; In addition, add 5g of diphenylguanidine and 10 grams of urethane pin in every liter of mixed solution by volume.

[0033] (2) Put the 50CrV30A steel sample containing carbides into the electrolytic cell after polishing and cleaning, as the anode, and place it at the anode position in the middle of the electrolytic cell; nitrogen gas is introduced, and its flow rate is controlled at 0.5 liters / min; The ice bath is controlled at 0-3°C; the 316L stainless steel plate is used as the cathode; the electrolysis potential is adjusted to 4.5V, and the DC current density is 0.06A / cm 2 , electrolysis for 25 hours.

[0034] (3)...

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Abstract

The invention discloses a method for performing electrolytic extraction on ultrafine carbide in steel. The process comprises the following steps: (1) preparing an electrolyte from the following raw materials in percentage by weight: 3 to 5 percent of tetramethylammonium chloride, 8 to 12 percent of acetylacetone, 3 to 6 percent of glycol, 2 to 4 percent of tricthanolamine and the balance of ethanol; and adding 5 g of diphenylguanidine and 10 g of methenamine into each liter of mixed liquid; (2) taking a to-be-extracted steel sample as a positive electrode and performing electrolysis in the electrolyte in the step (1); and (3) performing filtering separation on the electrolyte after electrolysis by using a carbonic ester film, and cleaning with absolute ethanol to separate out the ultrafinecarbide in the steel sample. In the method, a novel organic electrolyte is adopted, the ultrafine carbide is intactly extracted from the steel matrix; the carbonic ester film in the field of life science is applied to separation of the ultrafine carbide, so that the ultrafine carbide in the steel can be extracted successfully; and in the method, the traditional conventional device is adopted, issimple and practical, and is simple and convenient to operate.

Description

technical field [0001] The invention relates to a method for extracting alloy samples, in particular to a method for electrolytically extracting ultrafine carbides in steel. Background technique [0002] Carbide in steel is of great significance to improve and improve the properties of the material matrix. In order to better study its formation mechanism in the process of hot working and subsequent heat treatment and its effect on the matrix, it is necessary to extract it from the steel intact for inspection and rating. Various extraction methods in the traditional sense are only limited to the study and evaluation of carbides from a two-dimensional perspective, but these methods are powerless for the complete extraction of ultrafine carbides. The main difficulties are as follows: (1) Carbide is easily eroded by various media interfaces during the extraction process, and it is difficult to achieve non-destructive separation; (2) Due to the extremely small size of ultrafine ...

Claims

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Application Information

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IPC IPC(8): G01N1/34
Inventor 朱坦华王利伟郭兴坤徐斌肖国华赵江翟晓毅孙彩凤
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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