CN102095624A - Preparation of ultralow-carbon sheet metallographic phase sample and tissue display method - Google Patents
Preparation of ultralow-carbon sheet metallographic phase sample and tissue display method Download PDFInfo
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- CN102095624A CN102095624A CN 201110046855 CN201110046855A CN102095624A CN 102095624 A CN102095624 A CN 102095624A CN 201110046855 CN201110046855 CN 201110046855 CN 201110046855 A CN201110046855 A CN 201110046855A CN 102095624 A CN102095624 A CN 102095624A
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Abstract
The invention discloses a preparation method of an ultralow-carbon sheet metallographic phase sample and a tissue display method, belonging to the technical field of preparation of metallographic phase samples. The preparation method of the ultralow-carbon sheet metallographic phase sample comprises four steps of embedding, grinding, polishing and corrosion of the sample. The preparation method has the advantages of being simple to operate, being capable of obtaining sheet tissue pictures with clear materials, solving the problem of difficult display of the ultralow-carbon sheet, and being applicable to sheets the metallographic phase tissue is pure ferrite.
Description
Technical field
The invention belongs to technical field of metallographic sample preparation, a kind of preparation and organization display method of Ultra-low carbon thin plate metallographic sample is provided especially.Be mainly used in the metallographic sample of preparation Ultra-low carbon thin plate, be applicable to that metallographic structure is pure ferritic thin plate.
Background technology
Ultra-low carbon thin plate such as ultra low carbon IF steel adopt advanced smelting technique, reduce the carbon content (＜0.006%) of steel grade, add Ti, Nb element fixation of C, N element, thereby obtain the pure ferritic steel of gap-free atom.Ferritic steel among the IF has outstanding deep drawability, excellent plastic strain ratio, good extensibility and non-aging performance, can satisfy the needs of auto industry to the light weight of material, combination property such as anti-corrosion, be one of state-of-the-art automotive sheet on the our times.
The ferritic structure hardness of Ultra-low carbon thin plate is lower, metallographic sample preparation grind with polishing process in cut appears easily, cause some illusions, bring very big difficulty for the observation of sample.And because Ultra-low carbon content, the tissue of pure ferritic thin plate corrodes also relatively difficulty.In the forefathers research once nital, ferric trichloride+hydrochloric acid+water and the copper sulphate+picric acid+solution such as water with 2%～4% its pure iron element soma is corroded.Found that ferrite crystal grain can not show fully that all picture is fuzzy, the high-quality picture clearly of can not breaking forth.
Summary of the invention
The object of the present invention is to provide a kind of preparation and organization display method of Ultra-low carbon thin plate metallographic sample, the preparation and the tissue of Ultra-low carbon (carbon content＜0.006%) thin plate metallographic sample can prepare the metallographic specimen and the display organization of Ultra-low carbon thin plate effectively.Be a kind of easy to operate, can effectively show the technology of Ultra-low carbon thin plate ferrite metallographic structure.
Specimen preparation of the present invention and tissue show and to comprise grinding, polish and corroding of the inlaying of sample, sample that concrete steps are:
Inlaying of a sample: because at present the sheet gauge of contact is mostly about 1mm, inconvenience is directly held with hand and is carried out sample preparation, can only carry out inlaying of sample earlier.At first sample is clipped (as Fig. 1), be placed in the edge specimen chamber of mounting press, inlay by EOP with butterfly clamp.
Grinding of b sample: grind on carborundum paper inlaying good sample, water is cooked lubricant when grinding, and lap speed is 100～500 rev/mins; Sample is earlier through the 800# grit paper, grind 2～3 minutes after, the water washed samples is then changed 1200# grit paper, 1500# grit paper and 2000# grit paper successively and is ground then; Whenever change a sand paper and all will rotate 90 degree along same direction when grinding, and observe the grinding state of specimen surface, the cut that guarantees abrasive surface is all in a direction;
The polishing of C sample: after sample cleans, being to polish on the polishing disk of weaving cotton cloth to polish with the velvet, be emery atomizing brilliant polish during polishing, the polishing disk rotating speed is 900～1200 rev/mins; Use the brilliant polish of granularity 7 μ m to throw during polishing earlier 2～5 minutes, use the polishing condition of microscopic examination sample then; The water washed samples cleans up the back brilliant polish that then changes granularity 3.5 μ m, granularity 1.5 μ m successively and polishes again; Use microscopic examination, the cut of, polished surface bright and clean up to polished surface is all till a direction;
The erosion of d sample: polished sample is put into corrosive liquid, and 5～60 seconds etch time, water flushing is then put into absolute alcohol again and is washed, and dries up.
The prescription of described corrosive liquid is: solid sulphuric acid copper 3～6g, hydrochloric acid 10～30ml, distilled water 10～30ml.
The invention has the advantages that: sample preparation methods is easy, the sample sharpness height of preparation.Having solved the plain soma of former Ultra-low carbon thin plate pure iron shows difficult and the unclear problem of demonstration.
Description of drawings
Fig. 1 butterfly clamping assay maps.
The metallographic structure photo (200X) of Fig. 2 ultra low carbon IF thin plate.
The metallographic structure photo (500X) of Fig. 3 ultra low carbon IF thin plate.
The metallographic structure photo (200X) of Fig. 4 Ultra-low carbon SDC06 thin plate.
The metallographic structure photo (500X) of Fig. 5 Ultra-low carbon SDC06 thin plate.
Embodiment
The preparation of the metallographic sample of embodiment 1 ultra low carbon IF steel and ferritic structure show
The ultra low carbon IF carbon content of steel is 0.002%, and the step that the preparation of its metallographic sample and ferritic structure show is:
Inlaying of a sample: because at present the sheet gauge of contact is mostly about 1mm, inconvenience is directly held with hand and is carried out sample preparation, can only carry out inlaying of sample earlier.At first sample is clipped (as Fig. 1), be placed in the edge specimen chamber of mounting press, inlay by EOP with butterfly clamp.
Grinding of b sample: grind on carborundum paper inlaying good sample, water is cooked lubricant when grinding, and lap speed is 500 rev/mins.Sample is earlier through the 800# grit paper, grind 2,3 minutes after, the water washed samples is then changed 1200# grit paper, 1500# grit paper and 2000# grit paper successively and is ground then.Whenever change a sand paper and all will rotate 90 degree along same direction when grinding, and constantly observe the grinding state of specimen surface, the cut that guarantees abrasive surface is all in a direction.
The polishing of C sample: after sample cleans, being to polish on the polishing disk of weaving cotton cloth to polish with the velvet, be emery atomizing brilliant polish during polishing, the polishing disk rotating speed is 900 rev/mins.Earlier with brilliant polish throwing a few minutes of granularity 7 μ m, use the polishing condition of microscopic examination sample then during polishing.The water washed samples cleans up the back brilliant polish that then changes granularity 3.5 μ m, granularity 1.5 μ m successively and polishes again.Use microscopic examination, the cut of, polished surface bright and clean up to polished surface is all till a direction.
The erosion of d sample: polished sample is put into corrosive liquid, and 15 seconds etch time, water flushing is then put into absolute alcohol more rapidly and is washed, and dries up.
The prescription of corrosive liquid is: solid sulphuric acid copper 4g, hydrochloric acid 20ml distilled water 10ml.
Be the metallographic structure photo (200X) of the ultra low carbon IF thin plate that obtains as Fig. 2, Fig. 3 is the picture (500X) of further enlargement factor, and as seen the Display of Grain Boundary of each crystal grain ground is all more clearly.And record its crystallite dimension and be about 13.91 μ m.
Embodiment 2: the preparation of the metallographic sample of Ultra-low carbon SDC06 thin plate and ferritic structure show
Ultra-low carbon SDC06 thin plate carbon content is 0.003%, and the step that the preparation of its metallographic sample and ferritic structure show is:
Inlaying of a sample: because at present the sheet gauge of contact is mostly about 1mm, inconvenience is directly held with hand and is carried out sample preparation, can only carry out inlaying of sample earlier.At first sample is clipped (as Fig. 1), be placed in the edge specimen chamber of mounting press, inlay by EOP with butterfly clamp.
Grinding of b sample: grind on carborundum paper inlaying good sample, water is cooked lubricant when grinding, and lap speed is 500 rev/mins.Sample is earlier through the 800# grit paper, grind 2,3 minutes after, the water washed samples is then changed 1200# grit paper, 1500# grit paper and 2000# grit paper successively and is ground then.Whenever change a sand paper and all will rotate 90 degree along same direction when grinding, and constantly observe the grinding state of specimen surface, the cut that guarantees abrasive surface is all in a direction.
The polishing of C sample: after sample cleans, being to polish on the polishing disk of weaving cotton cloth to polish with the velvet, be emery atomizing brilliant polish during polishing, the polishing disk rotating speed is 900 rev/mins.Earlier with brilliant polish throwing a few minutes of granularity 7 μ m, use the polishing condition of microscopic examination sample then during polishing.The water washed samples cleans up the back brilliant polish that then changes granularity 3.5 μ m, granularity 1.5 μ m successively and polishes again.Use microscopic examination, the cut of, polished surface bright and clean up to polished surface is all till a direction.
The erosion of d sample: polished sample is put into corrosive liquid, and 35 seconds etch time, water flushing is then put into absolute alcohol more rapidly and is washed, and dries up.
The prescription of corrosive liquid is: solid sulphuric acid copper 4g, hydrochloric acid 20ml, distilled water 20ml.
Be the metallographic structure photo (200X) of the Ultra-low carbon SDC06 thin plate that obtains as Fig. 4, Fig. 5 is the picture (500X) of further enlargement factor, and as seen the Display of Grain Boundary of each crystal grain ground is all more clearly.And to record its crystallite dimension be 12.82 μ m.
Claims (2)
1. the preparation and the organization display method of a Ultra-low carbon thin plate metallographic sample comprise grinding, polish and corroding of the inlaying of sample, sample; It is characterized in that processing step is:
Inlaying of a sample: sample is clipped, be placed in the edge specimen chamber of mounting press, inlay by EOP;
Grinding of b sample: grind on carborundum paper inlaying good sample, water is cooked lubricant when grinding, and lap speed is 100～500 rev/mins; Sample is earlier through the 800# grit paper, grind 2～3 minutes after, the water washed samples is then changed 1200# grit paper, 1500# grit paper and 2000# grit paper successively and is ground then; Whenever change a sand paper and all will rotate 90 degree along same direction when grinding, and observe the grinding state of specimen surface, the cut that guarantees abrasive surface is all in a direction;
The polishing of C sample: after sample cleans, being to polish on the polishing disk of weaving cotton cloth to polish with the velvet, be emery atomizing brilliant polish during polishing, the polishing disk rotating speed is 900～1200 rev/mins; Use the brilliant polish of granularity 7 μ m to throw during polishing earlier 2～5 minutes, use the polishing condition of microscopic examination sample then; The water washed samples cleans up the back brilliant polish that then changes granularity 3.5 μ m, granularity 1.5 μ m successively and polishes again; Use microscopic examination, the cut of, polished surface bright and clean up to polished surface is all till a direction;
The erosion of d sample: polished sample is put into corrosive liquid, and 5～60 seconds etch time, water flushing is then put into absolute alcohol again and is washed, and dries up.
2. according to the preparation and the organization display method of the described Ultra-low carbon thin plate of claim 1 metallographic sample, it is characterized in that the prescription of the corrosive liquid in the steps d is: solid sulphuric acid copper 3～6g, hydrochloric acid 10～30ml, distilled water 10～30ml.
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| CN102252888A (en) * | 2011-06-30 | 2011-11-23 | 首钢总公司 | Preparation and tissue display method of ultralow carbon ultrathin cold heading steel wire metallographical sample |
| CN102607916A (en) * | 2012-03-12 | 2012-07-25 | 苏州协鑫工业应用研究院有限公司 | Preparation method of silicon chip metallographic specimen |
| CN102721593A (en) * | 2012-06-27 | 2012-10-10 | 北京科技大学 | Method for displaying original austenitic grain boundary of martensitic heat-resistant steel |
| CN102890027A (en) * | 2012-09-29 | 2013-01-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Metallographic structure display method of interstitial free (IF) steel cold-rolled sheet containing titanium (Ti) |
| CN103411972A (en) * | 2013-08-23 | 2013-11-27 | 北京科技大学 | Counting method of delta ferritic phase area content in Martensite heat resistant steel |
| CN103759993A (en) * | 2013-12-31 | 2014-04-30 | 广西玉柴机器股份有限公司 | Metallographic specimen preparation method |
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| CN106370489A (en) * | 2016-08-24 | 2017-02-01 | 江西稀有稀土金属钨业集团有限公司 | Sample production method used for hard alloy metallographic detection |
| CN108414554A (en) * | 2018-03-09 | 2018-08-17 | 暨南大学 | A method of it is measured for thick-walled seamless steel pipes material delta ferrite level |
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| CN103411972B (en) * | 2013-08-23 | 2016-04-27 | 北京科技大学 | Delta ferrite phase area content statistical method in a kind of martensite heat-resistant steel |
| CN103411972A (en) * | 2013-08-23 | 2013-11-27 | 北京科技大学 | Counting method of delta ferritic phase area content in Martensite heat resistant steel |
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| CN106370489B (en) * | 2016-08-24 | 2019-04-12 | 江西江钨硬质合金有限公司 | The method for making sample of hard alloy metallographic detection |
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Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |
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