CN103454217A - Metallographic coated test paper and preparation method thereof - Google Patents
Metallographic coated test paper and preparation method thereof Download PDFInfo
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- CN103454217A CN103454217A CN2012101835432A CN201210183543A CN103454217A CN 103454217 A CN103454217 A CN 103454217A CN 2012101835432 A CN2012101835432 A CN 2012101835432A CN 201210183543 A CN201210183543 A CN 201210183543A CN 103454217 A CN103454217 A CN 103454217A
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Abstract
The invention relates to the metal detection field, and discloses a metallographic coated test paper and a preparation method thereof. The metallographic coated test paper is composed of the following raw materials in parts by weight: 100 parts of cellulose diacetate, 0.1-2 parts of triphenyl phosphate and 0.001-0.02 part of dye. The preparation method comprises the following steps of dissolving the raw materials into 300-500 parts by weight of acetone and then planking to form a film. After sampling by a metallographic coating method, observation directly under a microscope can be realized and imaging can be carried out without chroming; therefore, detection becomes more convenient and efficient and the cost is reduced. If chroming treatment is carried out after sampling and coating, compared with a common metallographic coated test paper, metallographic development is clearer, contrast is obvious and the field of view is bright. According to the invention, the definition and detection effect of detection can be improved by changing the formulation of the metallographic coated test paper.
Description
Technical field
The present invention relates to the metallographic detection field, be specially the improved metallographic overlay film of a kind of formula test paper.
Background technology
Metallographic structure is the concrete form of reflection metal metallographic, and can observe by metallographic method is the internal organizational structure of metal or alloy.Metallographic detection method commonly used is the metallography microscope sem observation or samples with metallographic overlay film test paper.
Metaloscope is by photoelectric conversion technique and optical microscopy, can observe easily metallic phase image and analyze fractograph, utilizing metaloscope to observe check analysis metal inside institutional framework is a kind of metallographic detection method commonly used, is widely used in the micro-analysis of Metal and Alloy.But the application of metaloscope also has limitation, higher to site requirements, need shockproof, moistureproof and prevent dust, while being detected at the scene, to there is Special Equipment to place metaloscope, use inconvenience.
Metallographic overlay film test paper is a kind of plastic sheeting of making by means of the replica principle of transmission electron microscope, is that cellulose diacetate (AC) is dissolved in acetone, and solution is layered on to smooth, clean dry surface, after volatilization acetone, makes a kind of film obtained.Its advantage is after the sampling of metal sample surface, to stay fractograph on test paper at the scene, can observe with common optical microscope after treatment.Metallographic overlay film test paper can be used for the on-the-spot metallographics of the non-destructives such as ladle, pressure vessel and detects, and also can in failure analysis, clear up the fracture surface dirt, by repeatedly pasting, the method for mechanical glass, and removal corrosion and greasy dirt, and do not destroy fracture.
But common metallographic overlay film test paper also has shortcoming, the metallograph formed on the test paper surface after sampling can not, directly at the optical microphotograph Microscopic observation, need could video picture to observe after the chromium plating film.
Therefore, need to make improvements the test paper formula, increase its pliability, improve sharpness, increase contrast and visual field lightness, and reduce costs.
Summary of the invention
The present invention aims to provide a kind of metallographic overlay film test paper.
The present invention also provides the preparation method of above-mentioned metallographic overlay film test paper.
Technical scheme is that the composition of metallographic overlay film test paper comprises the raw material of following weight ratio:
100 parts of cellulose diacetates
0.1～2 part of triphenyl phosphate
0.001～0.2 part of dyestuff.
Dyestuff can be selected gentian violet (being gentian violet, methyl violet).
Preferably, the dyestuff weight portion is 0.001～0.02 part.
Metallographic overlay film test paper thickness is 80～100 μ m.
The method for preparing this metallographic overlay film test paper is that just above-mentioned raw materials is dissolved in bed board film forming after 300～500 weight portion acetone, comprises the following steps:
(1) 100 weight portion cellulose diacetates, 0.1～2 weight portion triphenyl phosphate and 0.001～0.02 weight portion dyestuff (dyestuff is preferably 0.001～0.02 weight portion) are dissolved in 300～500 weight portion acetone;
(2) solution is layered on flat surface to film forming after the removal solvent acetone.
Preferably, (time be preferably 2 hours～5 days) after solution left standstill is got to supernatant or filter after get filtrate, be layered on flat surface film forming after the solvent acetone volatilization.
Resulting metallographic overlay film test paper contains triphenyl phosphate, and pliability increases, and cracky not during use, carry out on-the-spot metallographic detection, and while covering metal surface, sampling is more convenient.With common commercially available metallographic overlay film test paper, compare, good springiness, be difficult for brittle failure or tear, and the holding time as a result of metallographic sample detecting is longer.
When the on-the-spot metallographic such as the non-destructive such as ladle, pressure vessel is detected, after adopting the sampling of metallographic film covering method, can directly examine under a microscope, but, without just imaging of chromium plating, make to detect more convenient efficient, and reduce costs.
As after the overlay film of sampling processing through chromium plating, with common metallographic tectorial paper, compare, the metallographic video picture is more clear, obviously, visual field is bright in the contrast contrast.
Simultaneously, the metallographic overlay film test paper after formula improves, still can effectively remove greasy dirt and the corrosion of fracture surface, and not injure fracture itself.
The present invention detects by the formula that changes metallographic overlay film test paper, can improve sharpness and detect effect; Can directly observe after sampling, but, without just imaging of chromium plating, be observed with microscope, make detection method more convenient, and reduce costs.
The accompanying drawing explanation
Fig. 1 is that common commercially available metallographic overlay film test paper (A) and the embodiment of the present invention 1 metallographic overlay film test paper (B) does to same sample the result that on-the-spot metallographic detects.
Embodiment
Embodiment 1
The gentian violet solution that cellulose diacetate 100g, 1g triphenyl phosphate and 1.5ml concentration are 10g/L joins in 450g acetone, is stirred to dissolving.
The solution left standstill of gained after 3 days is poured on supernatant in the glass plate, surface plate or smooth enamel ware of dry cleansing, after the solvent acetone volatilization, takes off dry film, obtains metallographic overlay film test paper of the present invention, and thickness is 80～100 μ m.
With common metallographic test paper, compare, the metallographic overlay film test paper better softness that the present invention obtains, get final product video picture without the chromium plating film after the detection sampling, directly at common optical microphotograph Microscopic observation, be particularly useful for on-the-spot sampling and observation, can improve work efficiency, save time and cost; And common metallographic tectorial paper can't video picture and observation without the chromium plating processing.
As shown in Figure 1, after chromium plating is processed, metallographic overlay film test paper of the present invention is compared with common commercially available metallographic overlay film test paper, and sharpness improves at least one times.
After sampling, metallographic overlay film test paper of the present invention, because flexibility is good, is difficult for brittle failure, and after the metallographic sample detecting, the holding time of test paper is longer than common commercially available metallographic overlay film test paper.
In failure analysis, above-mentioned metallographic overlay film test paper, for clearing up the fracture surface dirt, by mechanical glass process, is pasted with test paper repeatedly, can effectively remove corrosion and the greasy dirt of metal construction fracture surface, and not destroy fracture.
Embodiment 2
The gentian violet solution that cellulose diacetate 100g, 0.5g triphenyl phosphate and 0.5ml concentration are 10g/L joins in 300g acetone, is stirred to dissolving.
The solution left standstill of gained after 12 hours is poured on supernatant in the sheet glass, surface plate or smooth enamel ware of dry cleansing, surperficial no marking, take off dry film after the solvent acetone volatilization, obtain metallographic overlay film test paper of the present invention, thickness is 80～100 μ m.
Result of use is with embodiment 1, and above-mentioned metallographic overlay film test paper can effectively be removed the metal fracture surface contaminants; With common metallographic test paper, compare, the metallographic overlay film test paper better softness that the present invention obtains, get final product video picture without the chromium plating film after detection, directly examines under a microscope; Chromium plating is compared with common metallographic overlay film test paper after processing, and the contrast contrast is more obvious, and visual field is brighter.
Embodiment 3
The gentian violet solution that cellulose diacetate 100g, 1.8g triphenyl phosphate and 0.2ml concentration are 10g/L joins in 400g acetone, is stirred to dissolving.
The gained solution left standstill after 2 hours is poured on supernatant in the glass plate, surface plate or smooth enamel ware of dry cleansing, after the solvent acetone volatilization, takes off dry film, obtains metallographic overlay film test paper, and thickness is 80～100 μ m, and result of use is with embodiment 1.
Embodiment 4
The gentian violet solution that cellulose diacetate 100g, 0.2g triphenyl phosphate and 2ml concentration are 10g/L joins in 380g acetone, is stirred to dissolving, and all the other are with embodiment 1.
Get after the gained solution filter in glass plate that filtrate is poured on dry cleansing, surface plate or smooth enamel ware, after the solvent acetone volatilization, take off dry film, obtain metallographic overlay film test paper, thickness is 80～100 μ m, and result of use is with embodiment 1.
Claims (5)
1. a metallographic overlay film test paper, is characterized in that, comprises the raw material of following weight ratio:
100 parts of cellulose diacetates
0.1～2 part of triphenyl phosphate
0.001～0.2 part of dyestuff.
2. the described metallographic overlay film of claim 1 test paper, is characterized in that, described dyestuff is selected from methyl violet.
3. the described metallographic overlay film of claim 1 test paper, is characterized in that, thickness is 80～100 μ m.
4. the preparation method of claim 1,2 or 3 described metallographic overlay film test paper, is characterized in that, comprises the steps:
(1) 100 weight portion cellulose diacetates, 0.1～2 weight portion triphenyl phosphate and 0.001～0.2 weight portion dyestuff are dissolved in 300～500 weight portion acetone;
(2) solution is layered on flat surface to film forming after the removal solvent acetone.
5. the preparation method of the described metallographic overlay film of claim 4 test paper, is characterized in that, in step (1), will after the solution left standstill obtained, get supernatant, or get filtrate after filtering.
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| CN2012101835432A CN103454217A (en) | 2012-06-05 | 2012-06-05 | Metallographic coated test paper and preparation method thereof |
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| CN2012101835432A CN103454217A (en) | 2012-06-05 | 2012-06-05 | Metallographic coated test paper and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248687A (en) * | 2016-08-29 | 2016-12-21 | 中航动力股份有限公司 | A kind of non-destructive cracks of metal surface microscopic detection method |
| CN109187541A (en) * | 2018-09-19 | 2019-01-11 | 西安热工研究院有限公司 | A kind of scene metallurgic replica method |
| CN111811898A (en) * | 2020-06-15 | 2020-10-23 | 大唐东北电力试验研究院有限公司 | Metallography is compound AC paper and is prepared instrument |
| CN112268903A (en) * | 2020-10-15 | 2021-01-26 | 华能国际电力股份有限公司 | On-site metallographic coated test paper and preparation and use methods thereof |
| CN112525735A (en) * | 2020-11-17 | 2021-03-19 | 中国航发北京航空材料研究院 | Replica method for detecting fatigue small crack condition |
| CN113896953A (en) * | 2021-09-29 | 2022-01-07 | 西安热工研究院有限公司 | Metallographic coated test paper and preparation method thereof |
| CN113912881A (en) * | 2021-10-11 | 2022-01-11 | 天津市思维奇检测技术有限公司 | Toughness strengthening method for metallographic coated AC test paper |
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| CN101592570A (en) * | 2009-07-02 | 2009-12-02 | 河北省电力研究院 | A kind of metallurgical phase complex film |
| CN202281717U (en) * | 2011-10-17 | 2012-06-20 | 江西省电力科学研究院 | Auxiliary sample loading device for observing AC (Activated Charcoal) laminating metallic phases in laboratory |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248687A (en) * | 2016-08-29 | 2016-12-21 | 中航动力股份有限公司 | A kind of non-destructive cracks of metal surface microscopic detection method |
| CN109187541A (en) * | 2018-09-19 | 2019-01-11 | 西安热工研究院有限公司 | A kind of scene metallurgic replica method |
| CN111811898A (en) * | 2020-06-15 | 2020-10-23 | 大唐东北电力试验研究院有限公司 | Metallography is compound AC paper and is prepared instrument |
| CN112268903A (en) * | 2020-10-15 | 2021-01-26 | 华能国际电力股份有限公司 | On-site metallographic coated test paper and preparation and use methods thereof |
| CN112525735A (en) * | 2020-11-17 | 2021-03-19 | 中国航发北京航空材料研究院 | Replica method for detecting fatigue small crack condition |
| CN113896953A (en) * | 2021-09-29 | 2022-01-07 | 西安热工研究院有限公司 | Metallographic coated test paper and preparation method thereof |
| CN113912881A (en) * | 2021-10-11 | 2022-01-11 | 天津市思维奇检测技术有限公司 | Toughness strengthening method for metallographic coated AC test paper |
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Application publication date: 20131218 |