CN103389304A - Area content evaluation method of M/A island tissue in pipeline steel - Google Patents
Area content evaluation method of M/A island tissue in pipeline steel Download PDFInfo
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- CN103389304A CN103389304A CN2012101501041A CN201210150104A CN103389304A CN 103389304 A CN103389304 A CN 103389304A CN 2012101501041 A CN2012101501041 A CN 2012101501041A CN 201210150104 A CN201210150104 A CN 201210150104A CN 103389304 A CN103389304 A CN 103389304A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000011156 evaluation Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 31
- 230000000007 visual effect Effects 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 235000019441 ethanol Nutrition 0.000 claims description 14
- 230000007797 corrosion Effects 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 11
- 239000012153 distilled water Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000012128 staining reagent Substances 0.000 claims description 8
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 claims description 6
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 6
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 6
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000003908 quality control method Methods 0.000 abstract description 2
- 238000011002 quantification Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 4
- 229910001563 bainite Inorganic materials 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000662429 Fenerbahce Species 0.000 description 1
- 241001635252 Lapara Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 description 1
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- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
The invention discloses an area content evaluation method of M/A island tissues in pipeline steel. The invention belongs to the technical field of metallurgical structure quantification. The method comprises the steps that: a M/A island tissue area content series standard rating charts are established; a pipeline steel test sample is subjected to M/A island tissue display treatment; the M/A island tissue of the sample is observed with a metallurgical microscope, and is compared with the established M/A island tissue area content series standard rating charts; and a standard rating chart mostly close to the M/A island tissue area content in the view field is determined, such that the M/A island tissue area content of the tested pipeline steel is obtained. The method has the advantages of simple operation and low requirements on operator identification ability and M/A island display gray scale. With the comparison with the series standard rating charts, M/A island area content in the tissue can be rapidly and conveniently evaluated. The result is accurate and reliable. Therefore, technical support is provided for pipeline steel structural design and quality control.
Description
Technical field
The present invention relates to metallographic structure quantitative technique field, more particularly, relate to the area content assessment method of M/A island tissue in a kind of pipe line steel.
Background technology
The toughness and tenacity of steel and its heterogeneous microstructure are closely related.High Grade Pipeline Steel usually adopts the heat engine tool to control technique (TMCP) or online heat treatment technics (HOP) obtains granular bainite (GB) tissue.The distinguishing feature of granular bainite microstructure is distributing on high density dislocation iron-based body martensite and retained austenite (M/A) constituent element.This constituent element is island usually, therefore is called the M/A island.The M/A island is the important composition of granular bainite microstructure, mainly is distributed in intracrystalline or grain boundaries.As hard second-phase in tissue, there is appreciable impact on the M/A island on the mechanical property of pipe line steel especially break resistance.Therefore, the quantitative assessment of the characteristic parameters such as M/A island area content, size has become the indispensable project of pipe line steel check.
At present, laboratory area content assessment method commonly used is metallographic software quantitative analysis method, and the method generally is divided into manual extraction and automatically extracts.
Manual extraction is to use metallographic software or image processing software that all M/A islands are extracted by manual operations, then the M/A island total area is compared and is obtained area content with the area of metallograph.The manual extraction method, owing to adopting manual identification, wastes time and energy, and it is very high that operating personnel are identified the Capability Requirement on M/A island.
Automatic extraction is the gray scale difference in software utilization tissue, automatically extracts M/A island tissue and carries out quantitative test.Although the method is rapidly simple, and is very high to the requirement of M/A island display packing.If M/A island and matrix gray scale difference are not obvious.Software tends to a crystal boundary or carbonide and extracts and analyze, and what cause quantitatively calculating is inaccurate.
Chinese patent CN 102175191 A provide the quantivative approach of a kind of M/A island area percentage.At first the method has adopted the Lapara mordant to carry out painted to the M/A island.Then use laser confocal microscope scanned sample under zlasing mode, and light intensity is carried out suitably regulating obtain gray scale difference and significantly organize photo.Although the content on M/A island in the method energy accurate analysis pipe line steel tissue.But its complicated operation, need to coordinate the use of laser confocal microscope, and this microscope is more expensive, belongs to high-end, unconventional equipment.
Therefore, said method is when the area content of evaluation M/A island, and existence is wasted time and energy, complicated operation, and operating personnel's recognition capability and the display gray scale on M/A island are required high deficiency.
Summary of the invention
The object of the invention is to for existing method waste time and energy, complicated operation, and operating personnel's recognition capability and the display gray scale on M/A island are required high deficiency, the area content assessment method of M/A island tissue in a kind of pipe line steel is provided, and the method can be evaluated the area content on the M/A island in the pipe line steel tissue quickly and accurately.
To achieve these goals, the technical solution adopted in the present invention is as follows:
The area content assessment method of M/A island tissue in a kind of pipe line steel, described assessment method comprises:
Set up the M/A island of pipe line steel and organize area content series standard grading figure; Survey pipe line steel sample is carried out the M/A island organize Graphics Processing; By the M/A island tissue of microscopic examination sample, and with the M/A island of setting up, organize area content series standard grading figure to compare; Determine with visual field in the M/A island organize the immediate standard grading of area content figure, area content is organized on the M/A island that obtains the survey pipe line steel.
Described M/A organizes on island area content series standard grading figure, it is characterized in that: the high Grade Pipeline Steel of foundation tissue characteristic, the M/A island area content of the series standard grading figure that sets up is 0 ~ 6%, is spaced apart 0.5%.
Survey pipe line steel sample is carried out M/A island tissue show, its concrete grammar is as follows:
1) sample preparation: the check face of pipe line steel sample is polished and polishing, and the check face for preparing should become minute surface and no marking;
2) corrosion on M/A island shows: add the 0.95-1.05g Sodium Metabisulfite in every 100ml distilled water; Add 3.6-3.7g picric acid and 0.6-0.7g NaOH in every 100ml absolute ethyl alcohol.Two kinds of solution are mixed and be heated to 50 ° of C～60 ° C, insulation 2-4min, dissolve it and fully react rear gained solution to be staining reagent fully, and described distilled water solution and ethanol solution volume ratio are 1:1-3:2; It is to clean and dry up with alcohol again after nital corrosion 5 ~ 10s of 2 ~ 4% that the pipe line steel sample for preparing is adopted volume ratio; The staining reagent for preparing is heated to 40 ° of C～60 ° C, the pipe line steel sample is put into wherein to soak after 120～240s adopt alcohol to clean to dry up, obtain brilliant white M/A island.
Sample also can adopt other solution corrosions, being as the criterion by clear demonstration M/A island tissue.
Preferably, add the 1g Sodium Metabisulfite in every 100ml distilled water in the corrosion step display on described M/A island; Add 3.65g picric acid and 0.65g NaOH in every 100ml absolute ethyl alcohol.Two kinds of solution are mixed and be heated to 55 ℃, insulation 3min, dissolve it and fully react rear gained solution to be staining reagent fully, and described distilled water solution and ethanol solution volume ratio are 3:2.
Preferably, the visual field quantity of being surveyed on pipe line steel test check face is at least two, and with the series standard grading figure that sets up, determine that the M/A island in each visual field organizes area content, obtain the M/A island area content evaluation result of survey pipe line steel sample by averaging.
If the M/A island in visual field of observing organizes area content to be between two grading figure content, its M/A island of surveying in visual field organizes area content to get two area content between grading figure.
Preferably, described microscopical enlargement factor is 500 times, organizes M/A island in size and standard grading figure to organize size to be close with the M/A island in tested visual field and is as the criterion.When the size in M/A island size in tested visual field and standard series figure differs greatly while being difficult to comparison, suitably adjust microscopical enlargement ratio, make M/A island size in the tested visual field series of drawing that as far as possible is near the mark.
Beneficial effect of the present invention:
Simple to operate, the display gray scale on personnel's recognition capability and M/A island is required relatively low, made up the deficiencies in the prior art.The operator, by with standard series figure, comparing, evaluates the area content on M/A island in organizing rapidly, easily, and result accurately, reliably.The method provides technical support to pipeline steel organizational structure design and quality control.
Description of drawings
Fig. 1 is assessment method flow process process flow diagram provided by the present invention.
Fig. 2 is that to organize area content be 0.5% standard grading figure on the M/A island;
Fig. 3 is that to organize area content be 1.0% standard grading figure on the M/A island;
Fig. 4 is that to organize area content be 1.5% standard grading figure on the M/A island;
Fig. 5 is that to organize area content be 2.0% standard grading figure on the M/A island;
Fig. 6 is that to organize area content be 2.5% standard grading figure on the M/A island;
Fig. 7 is that to organize area content be 3.0% standard grading figure on the M/A island;
Fig. 8 is that to organize area content be 3.5% standard grading figure on the M/A island;
Fig. 9 is that to organize area content be 4.0% standard grading figure on the M/A island;
Figure 10 is that to organize area content be 4.5% standard grading figure on the M/A island;
Figure 11 is that to organize area content be 5.0% standard grading figure on the M/A island;
Figure 12 is that to organize area content be 5.5% standard grading figure on the M/A island;
Figure 13 is that to organize area content be 6.0% standard grading figure on the M/A island.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
The invention provides the area content assessment method of M/A island tissue in a kind of pipe line steel, as shown in Figure 1, described assessment method comprises:
One, area content series standard grading figure is organized on the M/A island of setting up pipe line steel; As shown in Fig. 2-13.The high Grade Pipeline Steel of foundation tissue characteristic, it is 0 ~ 6% that described M/A organizes on island the M/A island content of area content series standard grading figure, is spaced apart 0.5%.
Two, survey pipe line steel sample is carried out the M/A island and organize Graphics Processing; The concrete grammar step is as follows:
1) sample preparation: the check face of pipe line steel sample is polished and polishing, and the check face for preparing should become minute surface and no marking;
2) corrosion on M/A island shows: add the 0.95-1.05g Sodium Metabisulfite in every 100ml distilled water; Add 3.6-3.7g picric acid and 0.6-0.7g NaOH in every 100ml absolute ethyl alcohol.Two kinds of solution are mixed and be heated to 50 ° of C～60 ° C, insulation 2-4min, dissolve it and fully react rear gained solution to be staining reagent fully, and described distilled water solution and ethanol solution volume ratio are 1:1-3:2; It is to clean and dry up with alcohol again after nital corrosion 5 ~ 10s of 2 ~ 4% that the pipe line steel sample for preparing is adopted volume ratio; The staining reagent for preparing is heated to 40 ° of C～60 ° C, the pipe line steel sample is put into wherein to soak after 120～240s adopt alcohol to clean to dry up, obtain brilliant white M/A island.
It is 2 ~ 4% nital or other solution corrosions that sample also can adopt volume ratio, being as the criterion by clear demonstration M/A island tissue.
Preferably, add the 1g Sodium Metabisulfite in every 100ml distilled water in the corrosion step display on described M/A island; Add 3.65g picric acid and 0.65g NaOH in every 100ml absolute ethyl alcohol.Two kinds of solution are mixed and be heated to 50 ° of C～60 ° C, insulation 2-4min, dissolve it and fully react rear gained solution to be staining reagent fully, and described distilled water solution and ethanol solution volume ratio are 3:2.
Three, observe the M/A island tissue of pipe line steel sample by metaloscope, and with the M/A island of setting up, organize area content series standard grading figure to compare;
Four, the immediate standard grading of area content figure is organized on definite and M/A island that surveyed in visual field, and area content is organized on the M/A island that obtains the survey pipe line steel.
The visual field quantity of being surveyed on pipe line steel test check face is at least two, and with the series standard grading figure that sets up, determines that the M/A island in each visual field organizes area content, obtains the M/A island area content evaluation result of survey pipe line steel sample by averaging.
If the M/A island in visual field of observing organizes area content to be between two grading figure content, its M/A island of surveying in visual field organizes area content to get two area content between grading figure.
The enlargement factor of described metaloscope is 500 times, organizes M/A island in size and standard grading figure to organize size to be close with the M/A island in tested visual field and is as the criterion.When the size in M/A island size in tested visual field and standard series figure differs greatly while being difficult to comparative measurements, suitably adjust microscopical enlargement ratio, make M/A island size in the tested visual field series of drawing that as far as possible is near the mark.
Embodiment:
1) sample preparation: the X70 sample is used respectively 120#, 360#, 600#, 800#, 1000# metallographic waterproof abrasive paper are roughly ground, fine grinding, afterwards sample is used respectively each polishing of adamas spraying brilliant polish 3min of 2.5 μ m, 1.5 μ m.This moment, the check face of sample became minute surface and no marking.
2) demonstration on M/A island: will clean and dry up with alcohol behind the nital corrosion 6s left and right of sample employing 2%; With Sodium Metabisulfite 0.75g, picric acid 1.825g, NaOH 0.32g, distilled water 75ml, ethanol 50ml mix, and are heated to 50 ° of C, and sample is put into after wherein soaking 120s and cleaned and dry up with alcohol.
3) sample is placed under the metaloscope visual field and observes, first use the low whole check face of enlargement ratio complete observation, choose 3 moderate typical viewing field of M/A island area content on check face.
4) 3 typical viewing field are compared with standard series figure respectively, with with observe the immediate grading picture in visual field and determine that the M/A island organizes area content, record respectively the evaluation value and be respectively 2.0%, 1.75% and 2.0%, calculating M/A island that its mean value obtains this sample, to organize area content evaluation result be 1.92%.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. the area content assessment method of M/A island tissue in a pipe line steel, is characterized in that, described assessment method comprises:
Set up the M/A island of pipe line steel and organize area content series standard grading figure; Survey pipe line steel sample is carried out the M/A island organize Graphics Processing; By the M/A island tissue of microscopic examination pipe line steel sample, and with the M/A island of setting up, organize area content series standard grading figure to compare; Determine with visual field in the M/A island organize the immediate standard grading of area content figure, area content is organized on the M/A island that obtains the survey pipe line steel.
2. area content series standard grading figure is organized on M/A according to claim 1 island, and it is characterized in that: the M/A island area content of the series standard grading figure that sets up is 0 ~ 6%, is spaced apart 0.5%.
3. the area content assessment method of M/A island tissue in pipe line steel according to claim 1, is characterized in that, survey pipe line steel sample carried out M/A island tissue show, its concrete grammar is as follows:
1) sample preparation: the check face of pipe line steel sample is polished and polishing, make its check face become minute surface;
2) corrosion on M/A island shows: add the 0.95-1.05g Sodium Metabisulfite in every 100ml distilled water; Add 3.6-3.7g picric acid and 0.6-0.7g NaOH in every 100ml absolute ethyl alcohol.Two kinds of solution are mixed and be heated to 50 ℃～60 ℃, insulation 2-4min, dissolve it and fully react rear gained solution to be staining reagent fully, and described distilled water solution and ethanol solution volume ratio are 1:1-3:2; It is to clean and dry up with alcohol again after nital corrosion 5 ~ 10s of 2 ~ 4% that the pipe line steel sample for preparing is adopted volume ratio; The staining reagent for preparing is heated to 40 ℃～60 ° C, the pipe line steel sample is put into wherein to soak after 120～240s adopt alcohol to clean to dry up, obtain brilliant white M/A island.
4. the area content assessment method of M/A island tissue in pipe line steel according to claim 1, is characterized in that,
The visual field quantity of being surveyed on pipe line steel test check face is at least two, and with the M/A island in relatively more definite each visual field of series standard grading figure, organizes area content, obtains the M/A island area content evaluation result of survey pipe line steel sample by averaging.
5. the area content assessment method of M/A island tissue in pipe line steel according to claim 4, is characterized in that,
If the M/A island in visual field of observing organizes area content to be between two grading figure content, its M/A island of surveying in visual field organizes area content to get two area content between grading figure.
6. the area content assessment method of M/A island tissue according to claim 1-5 arbitrary described pipe line steels, is characterized in that,
Described microscopical enlargement factor is organized M/A island in size and standard grading figure to organize size to be close with the M/A island in tested visual field and is as the criterion.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374789A (en) * | 2014-10-24 | 2015-02-25 | 中国石油天然气集团公司 | Quantitative analysis method for content of martensite-austenite island structures in high-strength microalloy pipeline steel |
| CN106442522A (en) * | 2016-06-29 | 2017-02-22 | 内蒙古第机械集团有限公司 | Method for inspecting quality rating of 60Si2CrVAT steel heat treatment |
| CN109142010A (en) * | 2018-09-10 | 2019-01-04 | 中国石油天然气集团有限公司 | A kind of method of retained austenite distribution and content in detection low-alloy structural steel |
| CN109490300A (en) * | 2018-10-16 | 2019-03-19 | 包头钢铁（集团）有限责任公司 | The configuration method of reagent and the application method of reagent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195921A (en) * | 2000-12-25 | 2002-07-10 | Fuji Electric Co Ltd | Thin film sample and method for producing the thin film sample |
| US6841788B1 (en) * | 2000-08-03 | 2005-01-11 | Ascend Instruments, Inc. | Transmission electron microscope sample preparation |
| CN101949810A (en) * | 2010-08-12 | 2011-01-19 | 中国石油天然气集团公司 | Method for identifying and assessing needle-like ferrite pipe line steel tissues |
| CN102175191A (en) * | 2011-02-25 | 2011-09-07 | 首钢总公司 | Quantitative method for area percent of martensite-austenite (MA) island structure |
| RU2449055C1 (en) * | 2010-10-18 | 2012-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный политехнический университет" (ФГБОУ ВПО "СПбГПУ") | Investigation method of structure of tube steels |
-
2012
- 2012-05-07 CN CN201210150104.1A patent/CN103389304B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6841788B1 (en) * | 2000-08-03 | 2005-01-11 | Ascend Instruments, Inc. | Transmission electron microscope sample preparation |
| JP2002195921A (en) * | 2000-12-25 | 2002-07-10 | Fuji Electric Co Ltd | Thin film sample and method for producing the thin film sample |
| CN101949810A (en) * | 2010-08-12 | 2011-01-19 | 中国石油天然气集团公司 | Method for identifying and assessing needle-like ferrite pipe line steel tissues |
| RU2449055C1 (en) * | 2010-10-18 | 2012-04-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный политехнический университет" (ФГБОУ ВПО "СПбГПУ") | Investigation method of structure of tube steels |
| CN102175191A (en) * | 2011-02-25 | 2011-09-07 | 首钢总公司 | Quantitative method for area percent of martensite-austenite (MA) island structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374789A (en) * | 2014-10-24 | 2015-02-25 | 中国石油天然气集团公司 | Quantitative analysis method for content of martensite-austenite island structures in high-strength microalloy pipeline steel |
| CN106442522A (en) * | 2016-06-29 | 2017-02-22 | 内蒙古第机械集团有限公司 | Method for inspecting quality rating of 60Si2CrVAT steel heat treatment |
| CN109142010A (en) * | 2018-09-10 | 2019-01-04 | 中国石油天然气集团有限公司 | A kind of method of retained austenite distribution and content in detection low-alloy structural steel |
| CN109142010B (en) * | 2018-09-10 | 2020-12-01 | 中国石油天然气集团有限公司 | Method for detecting distribution and content of residual austenite in low-alloy structural steel |
| CN109490300A (en) * | 2018-10-16 | 2019-03-19 | 包头钢铁（集团）有限责任公司 | The configuration method of reagent and the application method of reagent |
| CN109490300B (en) * | 2018-10-16 | 2021-02-26 | 包头钢铁（集团）有限责任公司 | Reagent preparation method and reagent use method |
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| CN103389304B (en) | 2016-02-10 |
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