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Method for extracting inclusions in steel by non-aqueous solution electrolysis

An electrolytic extraction and non-aqueous solution technology, which is applied in the field of metal physics research and non-aqueous solution electrolytic extraction of inclusions in steel, can solve the problem of unstable extraction of inclusions, small-sized inclusions that cannot be accurately evaluated, unstable inclusions, etc. question

Active Publication Date: 2019-08-23
SUZHOU UNIV
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Problems solved by technology

However, when the steel sample is dissolved in acid, unstable inclusions (such as sulfides) and even some silicates will be dissolved or partially dissolved, so the extraction of inclusions by this method is unstable.
The electrolyte used in the aqueous solution electrolysis method is usually an acidic aqueous solution, which is similar to the acid solution method. In the acidic aqueous solution, some inclusions will be destroyed, and this electrolysis method can only completely retain the inclusions larger than 50 μm. Inclusions cannot be accurately evaluated

Method used

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  • Method for extracting inclusions in steel by non-aqueous solution electrolysis
  • Method for extracting inclusions in steel by non-aqueous solution electrolysis
  • Method for extracting inclusions in steel by non-aqueous solution electrolysis

Examples

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Embodiment

[0034] Example: Extraction of carbides in H13 steel by electrolysis of non-aqueous solution

[0035] Sample preparation: Cut the annealed H13 steel into thin slices of 20×40×5mm, and then polish it with sandpaper until the surface is smooth. After polishing, clean it with absolute ethanol and dry it.

[0036] Preparation of electrolyte: The composition of the electrolyte is: 4.2g tetramethylammonium chloride + 60g acetylacetone + 9g ammonium thiocyanate + 526.8g anhydrous methanol. Pour each substance into a beaker according to the required ratio and stir evenly with a glass rod.

[0037] Electrolysis process: see appendix figure 1 , the electrolysis workstation for non-aqueous solution electrolytic extraction of inclusions in steel includes a DC power supply 1, an electrolytic cell 2, the above electrolyte 3, and a stainless steel film 4; the stainless steel film is connected to the negative pole of the DC power supply, and the H13 steel sample 5 is connected to the positive...

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Abstract

The invention discloses a method for extracting inclusions in steel by non-aqueous solution electrolysis, and belongs to the field of metal physical researching methods. The method comprises the following steps: preparing a non-aqueous solution electrolyte; introducing inclusions and a steel substrate into a non-aqueous solution under certain electrolysis parameter; and then extracting and separating the inclusions with a centrifuging method. The non-aqueous electrolyte component (mass percentage) is prepared from 10 percent of acetylacetone, 0.7 percent of tetramethylammonium chloride, 1 to 5percent of ammonium thiocyanate and the balance of absolute methanol. The electrolysis parameters are as follows: the voltage is 2 to 5 V, and the current is 0.04 to 0.05A / cm<2>. Through control of the electrolyte formula and the electrolysis parameters, the inclusions in the steel are protected from being damaged in the electrolysis process, and the aim of extracting the inclusions in steel in anon-destructive manner is fulfilled.

Description

technical field [0001] The invention relates to a method for extracting inclusions in steel by non-aqueous solution electrolysis, which belongs to the field of metal physics research methods. Background technique [0002] Inclusions in steel will seriously affect the performance of steel. Different steel types have different requirements for inclusions in steel. The quantity, composition, size, distribution and shape of inclusions will affect the quality of steel. Therefore, detection and analysis of inclusions in steel is of great significance to improve the quality of steel. In order to study the inclusions comprehensively and deeply, it is necessary to extract the inclusions from the steel intact. [0003] Common methods for detecting and extracting inclusions in steel include metallographic method, acid solution method, aqueous solution electrolysis method, etc. Metallographic sample preparation is simple and takes a short time. However, this method can only observe th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2202G01N1/28G01N1/40
CPCG01N23/2202G01N1/28G01N1/40G01N2001/4038
Inventor 田俊韩博王德永苏丽娟屈天鹏王慧华
Owner SUZHOU UNIV
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