CN100593706C - Method for extracting steel superfine varia by electrolysis method - Google Patents
Method for extracting steel superfine varia by electrolysis method Download PDFInfo
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- CN100593706C CN100593706C CN200710038734A CN200710038734A CN100593706C CN 100593706 C CN100593706 C CN 100593706C CN 200710038734 A CN200710038734 A CN 200710038734A CN 200710038734 A CN200710038734 A CN 200710038734A CN 100593706 C CN100593706 C CN 100593706C
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Abstract
A method of applying electrolytic process to extract out superfine impurities in steel includes preparing organic electrolyte by 2wt% of tetramethylsalmiac, 8wt% of diacetone, 5wt% of glycerin, 6wt% of trolamine, allowance of pure methanol and 5g/L of DPG as per valum/weight; polishing and washing steel sample then placing steel sample in electrolytic tank; using steel sample as anode; leading inter-gas of argon in and regulating electrolytic potential, holding steel sample in said tank for 20-40hours then using vacuum filtering device to separate out superfine impurities in steel sample undervacuum condition.
Description
Technical field
The present invention relates to a kind of electrolytic process and extract the method for ultra-fine snotter in the steel, belong to the electrochemical process technical field.
Background technology
Ultra-fine snotter is of great importance to improving the ferrous materials substrate performance in the steel, and it forms mechanism and to the effect of matrix for better research, need be with its intact extracting from steel.Traditional various extracting method only is confined to perhaps study the medium-and-large-sized snotter of steel from three-dimensional perspective from two dimension angular research snotter, and these methods are mingled with powerless to complete extraction size less than 3 μ m ultra-fine.Difficulty below main the existence: snotter is easy to be corroded by various medium interfaces in (1) leaching process, is difficult to accomplish harmless the separation; (2) because ultra-fine to be mingled with size minimum, need select for use good combination property, suitable carriers to keep ultra-fine snotter.
Summary of the invention
The purpose of this invention is to provide a kind of method, for the formation mechanism of studying snotter lays the foundation with ultra-fine snotter in the electrolytic process extraction steel.
A kind of electrolytic process of the present invention is extracted the method for ultra-fine snotter in the steel, it is characterized in that having following step:
A. in electrolytic tank, put into the organic electrolyte of special formulation; The proportioning of described electrolytic solution is by weight percentage: tetramethyl ammonium chloride 2%, and diacetone 8%, glycerine 5%, triethanol ammonium 6%, purity is that 99.9% methyl alcohol is surplus; In addition, rise the diphenylguanidine that adds 5g in the mixed liquor at each by volume;
B. put into electrolytic tank after will containing the steel sample polished and cleaned of snotter, as anode, the anode position in the middle of being placed on; Feed the inert gas argon gas, its flow is 0.2 ~ 0.5 liter/minute; The temperature of electrolytic solution is 0 ~ 5 ℃; Adjust electrolytic potential to 1.8 ~ 3.4V, current density is 0.025 ~ 0.05A/cm
2, electrolysis time is 20 ~ 40 hours;
C. to have the aperture be that the polycarbonate membrane of 80nm is the vacuum separation filtration unit of filtration supports with putting into after the above-mentioned further cleaning and filtering of used for electrolyte absolute ethyl alcohol then, under the vacuum pumping state, separates the ultra-fine snotter that exists in the tapping sample.
The ultra-fine snotter that exists in the above-mentioned steel sample is: superfine oxide, nitride and Ti-Al-O-Mn-S complex inclusion.
In the organic electrolyte of the present invention, tetramethyl ammonium chloride wherein is as conductive agent and interfacial agent, makes whole steel sample reach even electrolysis by interfacial tension and the current potential that changes steel sample and electrolytic solution; Diacetone and triethanol ammonium can be avoided separating out of electrolytic process complex compound as complexing agent and buffering agent by adding these two kinds of reagent, make electrolytic process keep stable p H value simultaneously always, make snotter avoid the influence of potential of hydrogen mutually; Glycerine is as reductive agent; The adding diphenylguanidine is the protective agent as the snotter phase, and longer because of electrolysis time, ultra-fine snotter long period of soaking very easily is subjected to it and corrodes in electrolytic solution, adds diphenylguanidine and can make ultra-fine snotter avoid the erosion of electrolytic solution; Pure methyl alcohol is as solvent.
The mechanism of the inventive method is: steel matrix has different electrode decomposition electric potentials with wherein snotter, if electrolytic potential is controlled between the two, steel matrix is constantly by electrolysis, even thereby snotter is not yet wherein kept in electrolytic solution by electrolysis mutually under the function of current.
The principal feature of the inventive method is: (1) this method has disposed novel electrolyte, adjusts suitable electrolytic parameter, can guarantee to extract from base steel ultra-fine snotter is undamaged; (2) polycarbonate membrane of using on the biology is applied in the separation of ultra-fine snotter, thereby successfully extracts ultra-fine snotter in the tapping; (3) the inventive method is utilized the conventional appliance arrangement of tradition, and is simple, and easy and simple to handle.
Description of drawings
Fig. 1 is the synoptic diagram of the electrolysis unit of the conventional common use of the tradition that adopts among the present invention.
Wherein each digital code is expressed as follows:
The 1-over cap, 2-steel sample (as anode), 3-ice bath groove, 4-negative electrode, 5-direct supply, 6-tunger tube, 7-thermometer.
Embodiment
After now embodiments of the invention specifically being described in.
Embodiment one: at first configure organic electrolyte, the prescription of electrolytic solution is as follows: (wt%)
Above-mentioned electrolytic solution is put into electrolytic tank; The steel sample that will contain oxide inclusions is then put into electrolytic tank after polished and cleaned, as anode, be placed on the middle anode position of electrolytic tank; Feed the inert gas argon gas, its flow control is 0.2 liter/minute; Electrolyte temperature is controlled to be 0 ~ 5 ℃ by ice bath; Adjust electrolytic potential to 2.4V, DC current density is 0.04A/cm
2, electrolysis 24 hours.
To have the aperture be that the polycarbonate membrane of 80nm is the vacuum separation filtration unit of filtration supports with putting into after the above-mentioned further cleaning and filtering of used for electrolyte absolute ethyl alcohol then, under the vacuum pumping state, superfine oxide is mingled with separates.Detect through electron microscope, learn that it is the Al of football-shaped
2SiO
5Ultra-fine snotter, and have complete three-dimensional stereo topography.
Embodiment two: the organic electrolyte that is adopted in the present embodiment and the foregoing description 1 are identical.
In the present embodiment, the steel sample that will contain nitride inclusion is put into electrolytic tank after polished and cleaned, as anode, is placed on the middle anode position of electrolytic tank; Feed the inert gas argon gas, its flow control is 0.3 liter/minute; Electrolyte temperature is controlled to be 0 ~ 5 ℃ by ice bath; Adjust electrolytic potential to 3.2V, DC current density is 0.05A/cm
2, electrolysis 20 hours.
To have the aperture be that the polycarbonate membrane of 80nm is the vacuum separation filtration unit of filtration supports with putting into after the above-mentioned further cleaning and filtering of used for electrolyte absolute ethyl alcohol then, under the vacuum pumping state, ultra-fine nitride inclusion separated.Detect through electron microscope, learn that it is the ultra-fine snotter of TiN with obvious crystal formation feature, and have complete three-dimensional stereo topography.
Embodiment three
The organic electrolyte that is adopted in the present embodiment and the foregoing description 1 are identical.
In the present embodiment, the steel sample that will contain complex inclusion is put into electrolytic tank after polished and cleaned, as anode, is placed on the middle anode position of electrolytic tank; Feed the inert gas argon gas, its flow control is 0.5 liter/minute; Electrolyte temperature is controlled to be 0 ~ 5 ℃ by ice bath; Adjust electrolytic potential to 1.8V, DC current density is 0.025A/cm
2, electrolysis 40 hours.
To have the aperture be that the polycarbonate membrane of 80nm is the vacuum separation filtration unit of filtration supports with putting into after the above-mentioned further cleaning and filtering of used for electrolyte absolute ethyl alcohol then, under the vacuum pumping state, ultra-fine complex inclusion separated.Detect through electron microscope, learn that it is spherical Ti-Al-O-Mn-S complex inclusion, and have complete three-dimensional stereo topography.
In addition, test with same steel sample, is used dissolving with hydrochloric acid as a comparison, and after the polycarbonate membrane filtration, the subglobose Ti-Al-O-Mn duplex impurity of gained also has three-dimensional stereo topography, is mingled with and does not contain S the composition but demonstrate it from the spectroscopy detection result.As can be seen, electrolytic process can be better extracts ultra-fine complex inclusion is undamaged in the steel.
Claims (2)
1. an electrolytic process is extracted the method for ultra-fine snotter in the steel, it is characterized in that having following several steps:
A. in electrolytic tank, put into the organic electrolyte of special formulation; The proportioning of described electrolytic solution is by weight percentage: tetramethyl ammonium chloride 2%, and diacetone 8%, glycerine 5%, triethanol ammonium 6%, purity is that 99.9% methyl alcohol is surplus; In addition, rise the diphenylguanidine that adds 5g in the mixed liquor at each by volume;
B. put into electrolytic tank after will containing the steel sample polished and cleaned of snotter, as anode, the anode position in the middle of being placed on; Feed the inert gas argon gas, its flow is 0.2 ~ 0.5 liter/minute; The temperature of electrolytic solution is 0 ~ 5 ℃; Adjust electrolytic potential to 1.8 ~ 3.4V, current density is 0.025 ~ 0.05A/cm
2, electrolysis time is 20 ~ 40 hours;
C. to have the aperture be that the polycarbonate membrane of 80nm is the vacuum separation filtration unit of filtration supports with putting into after the above-mentioned further cleaning and filtering of used for electrolyte absolute ethyl alcohol then, under the vacuum pumping state, separates the ultra-fine snotter that exists in the tapping sample.
2. a kind of electrolytic process according to claim 1 is extracted the method for ultra-fine snotter in the steel, it is characterized in that the ultra-fine snotter that exists in the described steel sample is superfine oxide, nitride and Ti-Al-O-Mn-S complex inclusion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710038734A CN100593706C (en) | 2007-03-29 | 2007-03-29 | Method for extracting steel superfine varia by electrolysis method |
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| CN200710038734A CN100593706C (en) | 2007-03-29 | 2007-03-29 | Method for extracting steel superfine varia by electrolysis method |
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| CN101074907A CN101074907A (en) | 2007-11-21 |
| CN100593706C true CN100593706C (en) | 2010-03-10 |
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Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101256123B (en) * | 2007-11-30 | 2010-07-14 | 莱芜钢铁集团有限公司 | Pumping-filtering method and apparatus for quantitatively extracting nano educt |
| CN101556225B (en) * | 2009-05-22 | 2011-06-08 | 北京科技大学 | Method adopting neutral salt electrolyte to electrolytically extract tiny impurities from steel |
| CN102033008B (en) * | 2010-10-25 | 2012-11-07 | 上海大学 | Method for extracting S30432 steel carbonitride with electrolytic method |
| CN102213654B (en) * | 2011-05-13 | 2012-10-10 | 江阴兴澄特种钢铁有限公司 | Electrolytic extraction and detection method of nonmetallic inclusion in steel by utilizing organic solution |
| CN102538703B (en) * | 2011-12-21 | 2014-05-28 | 北京科技大学 | Method for extracting and observing three-dimensional appearance of non-metallic inclusion in steel in full-scale mode |
| CN102818723B (en) * | 2012-09-07 | 2014-07-23 | 首钢总公司 | Method of electrolytically extracting and detecting fine inclusions in steel |
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| CN103898596A (en) * | 2014-03-28 | 2014-07-02 | 上海大学 | Organic electrolyte, method for extracting non-metallic inclusions from steel and electrolyzer |
| CN104807684A (en) * | 2015-05-12 | 2015-07-29 | 首钢总公司 | Method for extracting and analyzing high-carbon steel inclusions |
| CN106840802A (en) * | 2017-03-09 | 2017-06-13 | 北京科技大学 | A kind of original appearance analysis method of electrolytic separation high-carbon steel inclusion |
| CN106969965A (en) * | 2017-03-09 | 2017-07-21 | 江苏省福达特种钢有限公司 | A kind of method that electrolysis extracts carbonitride |
| CN107167487A (en) * | 2017-06-26 | 2017-09-15 | 北京科技大学 | The integrating device and method of second phase particles in a kind of electroextraction steel |
| CN107576556A (en) * | 2017-08-15 | 2018-01-12 | 河钢股份有限公司邯郸分公司 | The method of superfine carbide in electroextraction steel |
| CN108827991B (en) * | 2018-07-27 | 2021-04-30 | 中南大学 | Reinforced phase characterization method of ferromagnetic alloy block and/or film |
| CN108802079B (en) * | 2018-07-27 | 2020-08-14 | 中南大学 | Second phase characterization method of ferromagnetic alloy powder |
| CN109632856B (en) * | 2018-12-05 | 2021-12-31 | 敬业钢铁有限公司 | Method for detecting inclusions in steel |
| CN110161066B (en) * | 2019-06-09 | 2022-03-15 | 苏州大学 | Method for extracting inclusions in steel through non-aqueous solution electrolysis |
| CN111238915B (en) * | 2020-02-12 | 2021-05-07 | 北京科技大学 | Method for extracting non-metallic inclusions in high-temperature alloy |
| CN112763523B (en) * | 2020-12-30 | 2022-10-11 | 上海大学 | Three-dimensional etching characterization method for high-nickel maraging steel nonmetallic inclusions |
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| US3673062A (en) * | 1970-02-06 | 1972-06-27 | New Nchanga Consolidated Coppe | Electrowinning of metal |
| US4148700A (en) * | 1976-10-14 | 1979-04-10 | David B. Dean | Method for purifying the liquor of a galvanizing process plant after contamination |
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