CN104148827B - The middle temperature brazing flux without corrosion of soldering aluminium alloy containing magnesium and preparation method - Google Patents
The middle temperature brazing flux without corrosion of soldering aluminium alloy containing magnesium and preparation method Download PDFInfo
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- CN104148827B CN104148827B CN201410271493.2A CN201410271493A CN104148827B CN 104148827 B CN104148827 B CN 104148827B CN 201410271493 A CN201410271493 A CN 201410271493A CN 104148827 B CN104148827 B CN 104148827B
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- brazing flux
- soldering
- aluminium alloy
- alloy containing
- containing magnesium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention provides the middle temperature brazing flux without corrosion formula of a kind of applicable aluminium alloy containing magnesium soldering in atmosphere.Warm brazing flux composition AlF in this
3-CsF binary eutectic composition brazing flux matrix and active material ZrF
4, the mass percent of each component of described brazing flux is: the AlF of 94%-97%
3-CsF binary eutectic composition brazing flux matrix, the ZrF of 3%-6%
4.Effect of the present invention is that the method is passed through to the addition of a small amount of active material ZrF to containing in Cs salt fluoride flux
4improve the activity of brazing flux, make it the soldering being applicable to aluminium alloy containing magnesium.Brazing flux fusing point 475 DEG C, brazing temperature 510-520 DEG C during soldering.Preparing under brazing flux effect, adopt Zn-Al solder to achieve the soldering of the common aluminium alloy containing magnesiums such as 6061,5052,5083 in atmosphere, and solder design is being good, the defects such as surperficial pore-free and slag inclusion.
Description
Technical field
The present invention relates to brazing material field, be especially applicable to middle temperature brazing flux without corrosion and the preparation method of soldering aluminium alloy containing magnesium.
Background technology
Aluminium alloy containing magnesium mainly contains rustproof aluminum alloy (LF series), duralumin (LY series), wrought aluminium (LD series) etc., and they are because specific strength is large, electrical and thermal conductivity is widely used in well Aero-Space, automobile, boats and ships and the electronic product such as mobile phone, computer.Large quantity research shows, the Mg of almag in heating process in alloy departs from and diffuses to the surface enrichment from matrix, form MgO layer on the most top layer of oxide-film, especially when Mg content is greater than the aluminium alloy brazing of 2.0%, fine and close abundant MgO membrane is extremely difficult removes, and becomes major obstacle during soldering.In addition, because major part contains magnalium magnesium gold solidus between 550-600 DEG C, for preventing producing burning during soldering, require that brazing temperature should control the mesophilic range below 550 DEG C.
One of effect of aluminum brazing flux is exactly the oxide-film removing Al and Alalloy surface, and the aluminum brazing flux comparatively early used is chloride brazing flux, the easy moisture absorption of this brazing flux, and corrosivity is strong, and postwelding needs cleaning.AlF
3-KF brazing flux non-corrosiveness, nonhygroscopic, but this brazing flux fusion temperature is higher, and fusion temperature is 558 DEG C, is not suitable for aluminium alloy middle temperature brazing.Chinese patent CN102727207A is by changing AlF
3with the ratio of KF, and by one or both in interpolation KCl, LiF and NaF, the fusion temperature of brazing flux has been reduced to 524-543 DEG C, but brazing flux operating temperature is still higher.Patent 101125398A by adding 0.3-1.0%ZnSiF in QF brazing flux
6improve the striping effect of brazing flux to 6063 aluminium alloys, but the fusion temperature of this brazing flux is 560 DEG C, is not suitable for the aluminium soldering under medium temperature condition.
For middle temperature aluminium soldering, existing non-corrosiveness brazing flux of generally acknowledging is AlF
3-CsF binary system brazing flux and AlF
3-CsF-KF ternary system brazing flux.But this brazing flux is to aluminium alloy containing magnesium, especially magnesium content is very poor higher than the aluminium alloy activity of 2%, striping difficulty, and developing the middle temperature brazing flux being applicable to removing its surface film oxide is the key point realizing soldering.
Summary of the invention
For above-mentioned the deficiencies in the prior art part, the object of this invention is to provide a kind of middle temperature brazing flux and preparation method of soldering aluminium alloy containing magnesium, be beneficial to solve aluminium alloy containing magnesium oxide-film and remove difficult, that braze ability is poor problem.
The technical solution used in the present invention is to provide a kind of middle temperature brazing flux of soldering aluminium alloy containing magnesium, wherein: AlF
3-CsF binary eutectic composition brazing flux matrix and active material ZrF
4, the mass percent of each component of described brazing flux is: the AlF of 94%-97%
3-CsF binary eutectic composition brazing flux matrix, the ZrF of 3%-6%
4.
A kind of preparation method of middle temperature brazing flux of soldering aluminium alloy containing magnesium is provided simultaneously, comprises the following steps:
1) AlF is taken respectively by described mass percent
3the powder of-CsF binary eutectic composition brazing flux matrix and active material ZrF
4powder;
2) by step 1) the brazing flux matrix powder that takes puts into the plastic conical bottle filling distilled water, heating water bath 15min on hot type magnetic stirring apparatus, and water temperature remains on 80-85 DEG C;
3) by step 1) in the active material ZrF that takes
4powder pours step 2 into) in solution, fully stir;
4) by step 3 after fully stirring 15min) solution pour in plastic ware air-dry, grinding, is the middle temperature brazing flux of soldering aluminium alloy containing magnesium; The fusing point of the middle temperature brazing flux of described soldering aluminium alloy containing magnesium is 475 DEG C, and brazing temperature during soldering is 510-520 DEG C.
Effect of the present invention is:
1, the fusing point 475 DEG C of brazing flux of the present invention, brazing temperature 510-520 DEG C, can lower than the mesophilic range welding of 550 DEG C.
2, the present invention passes through at AlF
3-CsF binary brazing flux matrix adds active material ZrF
4, substantially increase the activity of brazing flux, can be used for the middle temperature brazing of aluminium alloy containing magnesium, also can be used for other series alloys soldering.
3, brazing flux of the present invention is used for the aluminium alloy containing magnesium solderings such as 6061,5052,5083, and the soldered fitting obtained is shaped good, the defect such as pore-free and slag inclusion.After-welding brazing flux residue has non-hygroscopic and non-corrosive feature compared with traditional chlorinated thing brazing flux; With the AlF that fusing point is 558 DEG C
3it is lower that-KF fluoride flux compares fusing point, can solve burning problem during aluminium alloy containing magnesium soldering.
Detailed description of the invention
The corrosion-free middle temperature brazing flux of aluminium alloy containing magnesium soldering of the present invention and preparation method are illustrated in conjunction with the embodiments.
The corrosion-free middle temperature brazing flux design philosophy of aluminium alloy containing magnesium soldering of the present invention is: by with the addition of a small amount of active material ZrF to containing in Cs salt fluoride flux
4improve the activity of brazing flux, make it the soldering being applicable to aluminium alloy containing magnesium.The matrix of brazing flux can the Al of dissolved aluminum alloy surface
2o
3and the oxide-film of surface compact is broken, at this moment under film is infiltrated in Zr ionic oxide formation film gap, in film and aluminum substrate generation displacement reaction, Zr ion is reduced and is deposited on aluminum mother plate surface, aluminium then dissolves and enters brazing flux and become Al ion, this mass transfer reaction significantly reduces the interfacial tension of brazing flux and mother metal, promotes sprawling of solder.
The middle temperature brazing flux without corrosion constituent of soldering aluminium alloy containing magnesium of the present invention comprises the middle temperature brazing flux of soldering aluminium alloy containing magnesium, and in this, warm brazing flux constituent comprises AlF
3-CsF binary eutectic composition brazing flux matrix and active material ZrF
4, the mass percent of each component of described brazing flux is: the AlF of 94%-97%
3-CsF binary eutectic composition brazing flux matrix, the ZrF of 3%-6%
4.
The preparation method of the middle temperature brazing flux of soldering aluminium alloy containing magnesium of the present invention comprises the following steps:
1) AlF is taken respectively by described mass percent
3the powder of-CsF binary eutectic composition brazing flux matrix and active material ZrF
4powder;
2) by step 1) the brazing flux matrix powder that takes puts into the plastic conical bottle filling distilled water, heating water bath 15min on hot type magnetic stirring apparatus, and water temperature remains on 80-85 DEG C;
3) by step 1) in the active material ZrF that takes
4powder pours step 2 into) in solution, fully stir;
4) by step 3 after fully stirring 15min) solution pour in plastic ware air-dry, grinding, is the middle temperature brazing flux of soldering aluminium alloy containing magnesium; The fusing point of the middle temperature brazing flux of described soldering aluminium alloy containing magnesium is 475 DEG C, and brazing temperature during soldering is 510-520 DEG C
Embodiment 1:
The middle temperature brazing flux component formula of soldering aluminium alloy containing magnesium of the present invention: AlF
3-CsF binary eutectic composition brazing flux matrix and active material zirconium tetrafluoride, the mass percent of its composition is: brazing flux matrix 97%, zirconium tetrafluoride 3%.Preparation method:
1) AlF is taken respectively by formula rate
3-CsF binary eutectic composition brazing flux matrix powder and ZrF
4powder;
2) by step 1) the brazing flux matrix powder that takes puts into the plastic conical bottle filling distilled water, heating water bath 15min on hot type magnetic stirring apparatus, and water temperature remains on 80-85 DEG C;
3) by step 1) in the ZrF that takes
4powder pours step 2 into) in solution, fully stir;
4) by step 4 after fully stirring 15min) solution pours in plastic ware air-dry, and grinding, is brazing flux of the present invention.Brazing flux fusing point 475 DEG C.
By this brazing flux in conjunction with at Zn-Al solder in atmosphere 520 DEG C to 6061 aluminium alloys (containing Mg measure 0.8-1.2wt.%) soldering, the soldering lap joint obtained is without burning, and two sides fillet is round and smooth, the defects such as brazed seam pore-free, slag inclusion.
Embodiment 2:
The middle temperature aluminum brazing flux component formula of soldering high-magnesium aluminum alloy of the present invention: AlF
3-CsF binary eutectic composition brazing flux matrix and active material zirconium tetrafluoride, the mass percent of its composition is: brazing flux matrix 96%, zirconium tetrafluoride 4%.
Preparation method: preparation method is identical with embodiment 1.
By this brazing flux in conjunction with at Zn-Al solder in atmosphere 520 DEG C to 5052 aluminium alloys (containing Mg measure 2.2-2.8wt.%) soldering, the soldering lap joint obtained is without burning, and two sides fillet is round and smooth, the defects such as brazed seam pore-free, slag inclusion.
Embodiment 3:
The middle temperature aluminum brazing flux component formula of soldering high-magnesium aluminum alloy of the present invention: AlF
3-CsF binary eutectic composition brazing flux matrix and active material zirconium tetrafluoride, the mass percent of its composition is: brazing flux matrix 95%, zirconium tetrafluoride 5%.
Preparation method: preparation method is identical with embodiment 1.
By this brazing flux in conjunction with at Zn-Al solder in atmosphere 520 DEG C to 5083 aluminium alloys (containing Mg measure 4.0-4.9wt.%) soldering, the soldering lap joint obtained is without burning, and two sides fillet is round and smooth, the defects such as brazed seam pore-free, slag inclusion.
Embodiment 4:
The middle temperature aluminum brazing flux component formula of soldering high-magnesium aluminum alloy of the present invention: AlF
3-CsF binary eutectic composition brazing flux matrix and active material zirconium tetrafluoride, the mass percent of its composition is: brazing flux matrix 94%, zirconium tetrafluoride 6%.
Preparation method: preparation method is identical with embodiment 1.
By this brazing flux in conjunction with at Zn-Al solder in atmosphere 520 DEG C to 5A06 aluminium alloy (containing M
xamount 5.8-6.8wt.%) soldering, the soldering lap joint obtained is without burning, and two sides fillet is round and smooth, the defects such as brazed seam pore-free, slag inclusion.
Claims (2)
1. a middle temperature brazing flux for soldering aluminium alloy containing magnesium, is characterized in that: in this, warm brazing flux constituent comprises: AlF
3-CsF binary eutectic composition brazing flux matrix and active material ZrF
4, the mass percent of described middle temperature brazing flux constituent is: the AlF of 94%-97%
3-CsF binary eutectic composition brazing flux matrix, the ZrF of 3%-6%
4.
2. the preparation method of a kind of middle temperature brazing flux of soldering aluminium alloy containing magnesium as claimed in claim 1, comprises the following steps:
1) AlF is taken respectively by mass percent described in claim 1
3the powder of-CsF binary eutectic composition brazing flux matrix and active material ZrF
4powder;
2) by step 1) the brazing flux matrix powder that takes puts into the plastic conical bottle filling distilled water, heating water bath 15min on hot type magnetic stirring apparatus, and water temperature remains on 80-85 DEG C;
3) by step 1) in the active material ZrF that takes
4powder pours step 2 into) solution in, fully stir;
4) by step 3 after fully stirring 15min) solution pour in plastic ware air-dry, grinding, is the middle temperature brazing flux of soldering aluminium alloy containing magnesium; The fusing point of the middle temperature brazing flux of described soldering aluminium alloy containing magnesium is 475 DEG C, and brazing temperature during soldering is 510-520 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271493.2A CN104148827B (en) | 2014-06-17 | 2014-06-17 | The middle temperature brazing flux without corrosion of soldering aluminium alloy containing magnesium and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271493.2A CN104148827B (en) | 2014-06-17 | 2014-06-17 | The middle temperature brazing flux without corrosion of soldering aluminium alloy containing magnesium and preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN104148827A CN104148827A (en) | 2014-11-19 |
| CN104148827B true CN104148827B (en) | 2016-03-02 |
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|---|---|---|---|
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03151192A (en) * | 1989-11-08 | 1991-06-27 | Sumitomo Light Metal Ind Ltd | Flux composition for brazing al material |
| JPH03151191A (en) * | 1989-11-08 | 1991-06-27 | Sumitomo Light Metal Ind Ltd | Flux composition for brazing al material |
| JPH03155495A (en) * | 1989-11-08 | 1991-07-03 | Sumitomo Light Metal Ind Ltd | Flux composition for brazing al material |
| CN1390673A (en) * | 2002-07-05 | 2003-01-15 | 清华大学 | MgAl alloy solder without corrosive fluoride and its preparing process |
| CN101112738A (en) * | 2007-08-10 | 2008-01-30 | 广州有色金属研究院 | Soldering aluminum and brazing flux of aluminum alloy |
| CN103659054A (en) * | 2013-10-25 | 2014-03-26 | 天津大学 | Selffluxing brazing alloy suitable for brazing of thin aluminum plates and aluminum alloys and preparation method |
-
2014
- 2014-06-17 CN CN201410271493.2A patent/CN104148827B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03151192A (en) * | 1989-11-08 | 1991-06-27 | Sumitomo Light Metal Ind Ltd | Flux composition for brazing al material |
| JPH03151191A (en) * | 1989-11-08 | 1991-06-27 | Sumitomo Light Metal Ind Ltd | Flux composition for brazing al material |
| JPH03155495A (en) * | 1989-11-08 | 1991-07-03 | Sumitomo Light Metal Ind Ltd | Flux composition for brazing al material |
| CN1390673A (en) * | 2002-07-05 | 2003-01-15 | 清华大学 | MgAl alloy solder without corrosive fluoride and its preparing process |
| CN101112738A (en) * | 2007-08-10 | 2008-01-30 | 广州有色金属研究院 | Soldering aluminum and brazing flux of aluminum alloy |
| CN103659054A (en) * | 2013-10-25 | 2014-03-26 | 天津大学 | Selffluxing brazing alloy suitable for brazing of thin aluminum plates and aluminum alloys and preparation method |
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| CN104148827A (en) | 2014-11-19 |
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