Method of extracting and separating nano-scale precipitates in steel by means of organic electrolyte

A technology of organic electrolyte and precipitates, which is applied in the field of metal electrochemistry, can solve the problems of easy agglomeration of precipitates, and achieve the effect of solving easy agglomeration

Inactive Publication Date: 2017-12-22
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for extracting and separating nano-scale precipitates in steel by using an organic electrolyte, which can not only extract and separate nano-scale precipitates in steel without damage, but also solves the problem of traditional In the detection method, the nanoscale precipitates in steel are easy to agglomerate, so that the composition, size and three-dimensional shape characteristics of nanoscale precipitates in steel can be accurately detected

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  • Method of extracting and separating nano-scale precipitates in steel by means of organic electrolyte

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Embodiment approach

[0027] (1) Step A of the method provided by the present invention for extracting and separating nanoscale precipitates in steel using organic electrolyte can be as follows: figure 1 The device shown is implemented. like figure 1 As shown, the electrolytic cell 4 is located in the low-temperature constant temperature tank 5, and the organic electrolyte is put into the electrolytic cell 4; one end of the air pipe 3 extends into the bottom of the organic electrolyte, and the other end communicates with the inert gas bottle 6; to be extracted Both the steel material 1 and the stainless steel cylinder 2 are placed in the organic electrolyte, and the steel material 1 to be extracted is located on the axis line of the stainless steel cylinder 2, the steel material 1 to be extracted is electrically connected to the anode of the constant voltage power supply 7, and the stainless steel cylinder 2 is connected to the anode of the constant voltage power supply 7. The cathode of the const...

Embodiment 1

[0040] A method for extracting and separating nanoscale precipitates in steel using an organic electrolyte, comprising the steps of:

[0041] Step a1, process the steel to be extracted into a cuboid of 22mm, 6mm in width and 100mm in height, and drill a round hole with a diameter of 4mm at one end of the steel to be extracted, so as to facilitate the lifting of the steel to be extracted Hanging electrolysis; the surface of the steel to be extracted is processed to a smoothness of ▽6, and ultrasonic cleaning is performed with absolute ethanol, so as to obtain smooth and clean steel to be extracted.

[0042] Step b1, using such as figure 1 The shown device carries out constant voltage electrolysis; the organic electrolytic solution is put into the electrolytic cell 4, and the organic electrolytic solution is composed of 1.5wt.% tetramethylammonium chloride, 10wt.% acetylacetone and the balance of anhydrous Composed of methanol; the steel to be extracted and the stainless steel ...

Embodiment 2

[0047] A method for extracting and separating nanoscale precipitates in steel using an organic electrolyte, comprising the steps of:

[0048] Step a2, process the steel to be extracted into a cuboid of 25mm, 8mm in width, and 110mm in height, and drill a round hole with a diameter of 4mm at one end of the steel to be extracted, so as to facilitate the lifting of the steel to be extracted Hanging electrolysis; the surface of the steel to be extracted is processed to a smoothness of ▽6, and ultrasonic cleaning is performed with absolute ethanol, so as to obtain smooth and clean steel to be extracted.

[0049] Step b2, using such as figure 1 The shown device carries out constant voltage electrolysis; the organic electrolytic solution is put into the electrolytic cell 4, and the organic electrolytic solution is composed of 1wt.% tetramethylammonium chloride, 10wt.% acetylacetone and the anhydrous methanol of the balance Composition; the steel to be extracted and the stainless ste...

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Abstract

The invention discloses a method of extracting and separating nano-scale precipitates in steel by means of an organic electrolyte. The method includes the steps of: 1) performing constant-voltage electrolysis with a to-be-extracted steel material as an anode and a stainless steel cylinder as a cathode at a constant temperature to prepare an organic electrolyte which contains the nano-scale precipitates in steel; 2) performing magnetic separation to the organic electrolyte and performing primary filtration through a polyvinylidene fluoride membrane and secondary filtration through a polycarbonate membrane to obtain the nano-scale precipitates in steel; and 3) adding the nano-scale precipitates in steel into anhydrous ethanol, in which a surfactant is added, to perform ultrasonic dispersion, thus obtaining a turbid liquid containing the nano-scale precipitates in steel. The method can completely and losslessly extract the nano-scale precipitates in steel and solves a problem that a conventional extraction method is liable to cause agglomeration of the nano-scale precipitates in steel. The method can be used for accurately detecting the component, size and three-dimensional appearance characters of the nano-scale precipitates in steel.

Description

technical field [0001] The invention relates to the technical field of metal electrochemistry, in particular to a method for extracting and separating nanoscale precipitates in steel by using an organic electrolyte. Background technique [0002] At present, the method of strengthening the performance of steel through grain size refinement has gradually reached its limit, and the method of adding microalloying elements to form nano-scale precipitates in steel, and then interacting with dislocations to improve the strength of steel is just now. Become the development trend of steel toughening. The difference in the size of the nanoscale precipitates can show two different dislocation interactions; when the nanoscale precipitates are smaller than the critical size, the dislocation motion cuts them to cause coherent strain; and when the nanoscale precipitates are larger than the critical size , the dislocation movement bypasses it and causes the complete destruction of the cohe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28C25F3/06
CPCC25F3/06G01N1/28
Inventor 于月光杜开平张淑婷沈婕杨晓剑史记
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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