CN105891205A - Determination method of composite rate of aluminum-alloy brazing composite material - Google Patents
Determination method of composite rate of aluminum-alloy brazing composite material Download PDFInfo
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- CN105891205A CN105891205A CN201510031321.2A CN201510031321A CN105891205A CN 105891205 A CN105891205 A CN 105891205A CN 201510031321 A CN201510031321 A CN 201510031321A CN 105891205 A CN105891205 A CN 105891205A
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- alloy brazing
- aluminium alloy
- recombination rate
- brazing composite
- assay method
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Abstract
The invention discloses a determination method of the composite rate of an aluminum-alloy brazing composite material. The method comprises the following operation steps that an aluminum-alloy brazing composite material test sample is put in a solution formed by mixing hydrofluoric acid, hydrochloric acid, nitric acid and water, the test sample is rinsed with clear water and blow-dried after being corroded for a period of time, the upper coating layer thickness t1, the lower coating layer thickness t2 and the total thickness h of the test sample are measured under a metallographic microscope, and the composite rate f is calculated according to the following formula that f=(t1/h+t2/h)/2*100%. The determination method is simple, easy to operate and accurate in determination and has a good application value.
Description
Technical field
The present invention relates to the assay method of a kind of recombination rate, particularly to the mensuration side of a kind of aluminium alloy brazing composite recombination rate
Method.
Background technology
Aluminium alloy brazing composite is to be rolled through compound by by two or more (matrix 1 and clad 2,3) aluminium alloy
After strip (paper tinsel) material made, refer to Fig. 1.The recombination rate of composite determines the welding effect of brazing material, no
Same product has different requirements to coating thickness.Can cause when welding when clad is the thickest and be not easy fusing or the viscous connection of fusing,
Affect final products using effect, as heat-transfer effect deteriorates, corrosion resistance reduction etc..When clad is the thinnest, welding can be caused
Bad, also affect the use of product.
Accordingly, it would be desirable to the recombination rate of aluminium alloy brazing composite is strictly controlled.The mensuration of traditional recombination rate is optics
Microscopic method, i.e. enters to measure to each layer thickness of composite plate with the eyepiece with rule, and the method exists that error is big, operation difficulty
The problems such as degree is big.
Summary of the invention
For solving above-mentioned technical problem, the invention provides the assay method of a kind of aluminium alloy brazing composite recombination rate, to reach
To measuring accurately, it is ensured that the purpose of the quality of composite.
For reaching above-mentioned purpose, technical scheme is as follows:
The assay method of a kind of aluminium alloy brazing composite recombination rate, including following operating procedure: by aluminium alloy brazing composite wood
Material samples is placed in the solution mixed by Fluohydric acid., hydrochloric acid, nitric acid and water, rinses with clear water, blows after corrosion a period of time
Dry, under metallurgical microscope, survey coating thickness t1, lower coating thickness t2, and gross thickness h of sample, according to as follows
Formula calculates recombination rate f, f=(t1/h+t2/h)/2*100%.
Preferably, in described solution, the consumption of each material is respectively as follows: Fluohydric acid. 10ml, hydrochloric acid 5ml, nitric acid 5ml, water 380ml,
After the most each material mix homogeneously, it is placed in brown narrow-mouthed bottle.
Preferably, described etching time is 6-10min, and concrete etching time determines according to the thickness of sample.
Preferably, described aluminium alloy brazing composite materialses 8 pieces at diverse location respectively, averages after test, can divide
Do not take the sample at transmission side, fore side and middle part.
Further in technical scheme, the size of described sample is 3.0cm × 4cm.
Further in technical scheme, described sample needs, through corase grind, fine grinding and polishing, to roughly grind about 3min before corrosion,
Specimen surface polishes；Fine grinding dynamics wants light, and polish about 5min；Till being polished to make mirror effect.
By technique scheme, the assay method of the aluminium alloy brazing composite recombination rate that the present invention provides can be with Accurate Determining
The recombination rate of composite, provides reference, simple operation for actual production processing, it is easy to control, have broad application prospects.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or prior art
In description, the required accompanying drawing used is briefly described.
Fig. 1 is the schematic cross-section of the Al alloy composite disclosed in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely retouched
State.
The invention provides the assay method of a kind of aluminium alloy brazing composite recombination rate, detailed description of the invention is as follows:
1) sampling
At transmission side, fore side, middle part take in the middle part of 8 pieces of sample boards, respectively head transmission side, head altogether, header operations side,
In the middle part of transmission side in the middle part of volume, volume in the middle part of fore side, afterbody transmission side, afterbody, afterbody fore side, it is ensured that model thickness uniform one
Cause；Specimen size is 3.0cm × 4cm.
2) corase grind
Pre-mill rotating speed is 450-550r/min, sand paper 600 mesh, first by test check face two chamfer, Ke Yibao before polishing
Card sand paper and polishing cloth are not scraped off.Then by parallel rolling direction polishing sample, it is desirable to sample keeps vertical with sand paper, firmly
Uniformly, about 3min, till specimen surface polishes.If there being milling machine, sample can be processed on milling machine and replace corase grind.
3) fine grinding
Using sand paper 800 mesh, dynamics wants light, make sample smooth and smooth, it is desirable to be polishing to by sample till surface do not has cut,
Polish about 5min.
4) polishing
First pour a small amount of water into, make metallurgical polishing Fabric wettability, then spray polishing agent (granularity is 2.5UM) with high-efficiency diamond,
Be sprayed on metallurgical polishing fabric, polishing about 5min after, see that specimen surface is the brightest, as can not as bright finish,
Then need to continue spray high-efficiency diamond spraying polishing agent, and inspection face rotation 180 ° is polished again.Polishing 5min is left every time
The right side, until making mirror effect.
5) preparation of corrosive liquid
Take Fluohydric acid. 10ml, hydrochloric acid 5ml, nitric acid 5ml, after water 380ml mix homogeneously, be positioned in brown narrow-mouthed bottle.Often
Secondary corrosion sample determines capacity according to the quantity of sample.
Etching time table
| NO | Sample thickness (mm) | Time (min) |
| 1 | ＞ 2.5 | 10 |
| 2 | 1-2.5 | 6-8 |
After corrosion is good, rinse with clear water；Then with napkin or hair-dryer, sample is dried up.
6) recombination rate measures
(1) instrument configuration
Microscope model: metallurgical microscope 4XC
Plane cocular: 10X
Graduated ocular: 10X
Object lens: 10X 20X 40X 100X
Computer model: association ThinkVision
Analog-to-digital conversion interface 0.5XC 5,000,000 pixel color digital camera head
Micro slide: diameter 10mm/20mm
(2) software: CF1000 Metallographic Analysis software
(3) measure: the measurement of composite bed thickness need to take more than three line segments, seeks arithmetic mean of instantaneous value.The numerical value that composite bed calculates
Divided by sample thickness, it is recombination rate.
Recombination rate calculates:
Recombination rate=composite bed measures thickness/composite plate gross thickness * 100%
Recombination rate f=(t1/h+t2/h)/2*100%
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.To these
The multiple amendment of embodiment will be apparent from for those skilled in the art, generic principles defined herein
Can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will not be by
It is limited to the embodiments shown herein, and is to fit to consistent with principles disclosed herein and features of novelty the widest
Scope.
Claims (6)
1. the assay method of an aluminium alloy brazing composite recombination rate, it is characterised in that include following operating procedure: by aluminum
Alloy brazed composite sample is placed in the solution mixed by Fluohydric acid., hydrochloric acid, nitric acid and water, after corrosion a period of time
Rinse with clear water, dry up, under metallurgical microscope, survey coating thickness t1, lower coating thickness t2, and the total thickness of sample
Degree h, calculates recombination rate f, f=(t1/h+t2/h)/2*100% according to equation below.
The assay method of a kind of aluminium alloy brazing composite recombination rate the most according to claim 1, it is characterised in that institute
State the consumption of each material in solution and be respectively as follows: Fluohydric acid. 10ml, hydrochloric acid 5ml, nitric acid 5ml, water 380ml.
The assay method of a kind of aluminium alloy brazing composite recombination rate the most according to claim 1, it is characterised in that institute
Stating etching time is 6-10min.
The assay method of a kind of aluminium alloy brazing composite recombination rate the most according to claim 1, it is characterised in that institute
State aluminium alloy brazing composite and materials 8 pieces at diverse location respectively, average after test.
The assay method of a kind of aluminium alloy brazing composite recombination rate the most according to claim 4, it is characterised in that institute
The size stating sample is 3.0cm × 4cm.
The assay method of a kind of aluminium alloy brazing composite recombination rate the most according to claim 4, it is characterised in that institute
State sample to need before corrosion through corase grind, fine grinding and polishing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510031321.2A CN105891205A (en) | 2015-01-15 | 2015-01-15 | Determination method of composite rate of aluminum-alloy brazing composite material |
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| CN201510031321.2A CN105891205A (en) | 2015-01-15 | 2015-01-15 | Determination method of composite rate of aluminum-alloy brazing composite material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588529A (en) * | 2021-07-14 | 2021-11-02 | 银邦金属复合材料股份有限公司 | Method for measuring aluminum alloy composite foil |
| CN114295457A (en) * | 2021-12-30 | 2022-04-08 | 江苏鼎胜新能源材料股份有限公司 | High-efficiency low-cost metallographic polishing method for aluminum alloy brazing composite material |
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| CN104266595A (en) * | 2014-09-29 | 2015-01-07 | 宁波金田新材料有限公司 | Microscopic detection method for paint film thickness of enameled wire |
| CN104388852A (en) * | 2014-12-12 | 2015-03-04 | 东北轻合金有限责任公司 | Manufacturing method of three-layer composite aluminum alloy brazing filler metal plate for aviation |
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Patent Citations (3)
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| WO2013123771A1 (en) * | 2012-02-24 | 2013-08-29 | Shenzhen Byd Auto R & D Company Limited | Aluminum alloy-resin composite and preparation method thereof |
| CN104266595A (en) * | 2014-09-29 | 2015-01-07 | 宁波金田新材料有限公司 | Microscopic detection method for paint film thickness of enameled wire |
| CN104388852A (en) * | 2014-12-12 | 2015-03-04 | 东北轻合金有限责任公司 | Manufacturing method of three-layer composite aluminum alloy brazing filler metal plate for aviation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588529A (en) * | 2021-07-14 | 2021-11-02 | 银邦金属复合材料股份有限公司 | Method for measuring aluminum alloy composite foil |
| CN114295457A (en) * | 2021-12-30 | 2022-04-08 | 江苏鼎胜新能源材料股份有限公司 | High-efficiency low-cost metallographic polishing method for aluminum alloy brazing composite material |
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Application publication date: 20160824 |