CN1586794A - Al-Si base medium temperature welding flux containing rare-earth Er and its preparing method - Google Patents
Al-Si base medium temperature welding flux containing rare-earth Er and its preparing method Download PDFInfo
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- CN1586794A CN1586794A CN 200410074341 CN200410074341A CN1586794A CN 1586794 A CN1586794 A CN 1586794A CN 200410074341 CN200410074341 CN 200410074341 CN 200410074341 A CN200410074341 A CN 200410074341A CN 1586794 A CN1586794 A CN 1586794A
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- alloy
- fusing
- solder
- rare earth
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- 229910018125 Al-Si Inorganic materials 0.000 title claims abstract description 17
- 229910018520 Al—Si Inorganic materials 0.000 title claims abstract description 17
- 229910052761 rare earth metal Inorganic materials 0.000 title claims description 27
- 150000002910 rare earth metals Chemical class 0.000 title claims description 24
- 230000004907 flux Effects 0.000 title abstract 3
- 238000003466 welding Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title description 2
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 67
- 239000000956 alloy Substances 0.000 claims abstract description 67
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910018594 Si-Cu Inorganic materials 0.000 claims abstract description 9
- 229910008465 Si—Cu Inorganic materials 0.000 claims abstract description 9
- 238000003723 Smelting Methods 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 229910001371 Er alloy Inorganic materials 0.000 claims abstract description 5
- 229910000679 solder Inorganic materials 0.000 claims description 36
- 239000010949 copper Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 13
- 239000004411 aluminium Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 241001062472 Stokellia anisodon Species 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 27
- 150000003839 salts Chemical class 0.000 description 27
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 9
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000155 melt Substances 0.000 description 6
- 238000003892 spreading Methods 0.000 description 4
- 230000005496 eutectics Effects 0.000 description 3
- 229910001610 cryolite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Abstract
The present invention belongs to the field of the manufacture of aluminum and aluminum alloy. The medium temperature Al-Si base welding flux contains: Si 5-10 wt%, Cu 4-25 wt%, and RE Er 0.05-1.0 wt% except Al. The preparation process of the medium temperature Al-Si base welding flux includes coating Al-Si alloy with molten aluminum smelting agent; heating to 750-850 deg.c to smelt Al-Si alloy and adding Al and Cu in required amount into the molten Al-Si alloy via stirring to form Al-Si-Cu alloy; pressing Al-Er alloy into the molten Al-Si-Cu alloy for smelting, reaction, maintaining for 1-2 hr, stirring, letting stand and cooling to solidify; eliminating surface smelting agent; heating for re-smelting and casting. The alloy of the present invention has less alloy elements, good wetting performance, high strength, relatively low smelting point, and Er with function similar to that of Sc but lower cost.
Description
Technical field
A kind of rare earth Er contained Al-Si base intermediate temperature solder and preparation method thereof belongs to the processing and manufacturing field of aluminium and alloy thereof.
Background technology
Along with aluminium alloy application more and more widely, connectivity problem to aluminium alloy proposes higher requirement, soldering is as a kind of main mode of connection, require novel aluminium alloy brazing filler metal not only will have the favorable manufacturability energy, the more important thing is to have higher mechanical property, use ever-increasing requirement to satisfy aluminium alloy, guarantee that it under arms can reliability service in the process reliability.
Rare earth has very high chemically reactive, be a kind of typically, very active metal, have and breed and go bad, strengthen, improve resistance toheat and improve effect such as processing performance, obtained to use widely at metallurgy and material industry.Relevant rare earth aluminium alloy studies show that Sc is that discovery up to now is to aluminium and the most effective rare earth element of alloy thereof both at home and abroad.But Sc is strategic element, costs an arm and a leg.The effect of rare earth element er in aluminium and alloy thereof is similar to Sc, but the cost of Er is far below Sc, and this patent improves alloy property by add rare earth element er in solder alloy.
Summary of the invention
The present invention is directed to problems of the prior art, provide a kind of alloy constituent element less, wettability is good, the intensity height, and temperature of fusion is lower, rare earth Er contained Al-Si base intermediate temperature solder and preparation method thereof.
Rare earth Er contained Al-Si base intermediate temperature solder involved in the present invention is characterized in that: contain weight percent and be 5～10% Si, and 4～25% Cu, and 0.05～0.5% rare earth Er, remaining is Al.
The preparation method of rare earth Er contained Al-Si base intermediate temperature solder of the present invention is characterized in that, may further comprise the steps:
(1) the melting aluminum smelting agent is watered on the Al-Si alloy, melting dosage can cover the Al-Si alloy and get final product;
(2) temperature is risen to 750 ℃～850 ℃, treat the Al-Si alloy melting after, required fine aluminium, fine copper are joined in the fused Al-Si alloy liquid, stir, form the Al-Si-Cu alloy;
(3) treat its fusing evenly after, the Al-Er alloy is pressed in the above-mentioned alloy liquid, make its fusing and fully react with former liquation, be incubated 1～2 hour, stirring, static, cooled and solidified;
(4) solidify the smelting agent that the surface is removed in the back, temperature is reduced to 650～700 ℃ the solder piece is reheated fusing, and it is stand-by to cast then.
The used Al-Si of the present invention, Al-Er alloy are the alloy of commercially available definite composition, add Al-Si, Cu, Al-Er alloy amount can be obtained by the ratio in Si, Cu, each comfortable solder alloy of Er, total amount subtracts Al-Si, Cu, Al-Er amount and is required fine aluminium amount.
Below by some embodiment, in the mode of testing data and chart, the performance of the Al-Si base intermediate temperature solder that the present invention is rare earth Er contained is described, and compares with the Al-Si-Cu solder that obtains under the same conditions.
Table 1 is 6 kinds of rare earth Er contained Al-Si base intermediate temperature solder and Al-Si-Cu solder component lists, forms in the table all to be weight percentage, and gives the liquidus temperature and the solidus temperature of each solder simultaneously.As can be seen from Table 1, little behind the embodiment of the invention 1～6 adding rare earth to the fusing point influence of solder alloy.
Table 2 is comparisons of the embodiment of the invention 1～6 and Al-Si-Cu solder hardness and spreading area.As can be seen from the table, the hardness of the embodiment of the invention 1～6 and spreading area increase than Al-Si-Cu solder.
Raising below by this solder performance of marginal data.
Have better manufacturability energy and mechanical property in order to illustrate the rare earth Er contained Al-Si base intermediate temperature solder of the present invention, special attached Al-7Si-20Cu solder and the present invention's 2 micro-organization chart, compare as Figure of description 1,2, disclose the reason that its performance improves from microcosmic angle.
Contain acicular eutectic Si as can be seen from Figure 1 in the Al-Si-Cu solder tissue, a large amount of existence of this acicular eutectic Si can reduce the mechanical property of material.After the present invention added rare earth Er, the quantity of acicular eutectic Si obviously reduced, and organizing in the alloy is more even, can significantly improve the mechanical property of solder alloy.
Description of drawings:
Fig. 1: Al-7Si-20Cu solder micro-organization chart;
Fig. 2: the micro-organization chart of the Al-Si base intermediate temperature solder that the embodiment of the invention 2 is rare earth Er contained.
Embodiment
Comparative Examples 1: the Repone K and the 10 gram sodium-chlor mixing salts of 10 grams are watered on 29.661 gram Al-11.8Si alloys after the fusing down 700 ℃.Furnace temperature is risen to 780 ℃, 10.339 pure Al of gram and the pure Cu of 10.0 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be incubated 1 hour, constantly stir, make the alloy homogenizing.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 650 ℃ the solder piece reheated fusing, it is stand-by to be cast into strip then.
Comparative Examples 2: the Repone K and the 30 gram sodium-chlor mixing salts of 30 grams are watered on 21.19 gram Al-11.8Si alloys after the fusing down 700 ℃.Furnace temperature is risen to 800 ℃, 16.31 pure Al of gram and the pure Cu of 12.5 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be incubated 2 hours, stirred, and made the alloy homogenizing in per 10 minutes.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 650 ℃ the solder piece reheated fusing, water stand-by into strips then.
Comparative Examples 3: the Repone K and the 20 gram sodium-chlor mixing salts of 20 grams are watered on 42.37 gram Al-11.8Si alloys after the fusing down 700 ℃.Furnace temperature is risen to 850 ℃, 5.63 pure Al of gram and the pure Cu of 2 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be incubated 1 hour, constantly stir, make the alloy homogenizing.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 700 ℃ the solder piece reheated fusing, it is stand-by to be cast into strip then.
Example 1: the Repone K and the 10 gram sodium-chlor mixing salts of 10 grams are watered on 29.65 gram Al-11.8Si alloys after the fusing down 700 ℃.Furnace temperature is risen to 780 ℃, 9.56 pure Al of gram and the pure Cu of 9.995 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be pressed into rapidly in the middle of the above-mentioned molten alloy with bell jar with holes on the wall Al-6.2Er alloy, and constantly stir, till rare earth melts fully 0.403 gram.Be incubated 1 hour, constantly stir, make the alloy homogenizing.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 650 ℃ the solder piece reheated fusing, it is stand-by to be cast into strip then.
Example 2: the Repone K and the 15 gram sodium-chlor mixing salts of 15 grams are watered on 29.63 gram Al-11.8Si alloys after the fusing down 680 ℃.Furnace temperature is risen to 820 ℃, 9.574 pure Al of gram and the pure Cu of 9.99 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be pressed into rapidly in the middle of the above-mentioned molten alloy with bell jar with holes on the wall Al-6.2Er alloy, and constantly stir, till rare earth melts fully 0.806 gram.Be incubated 1 hour, constantly stir, make the alloy homogenizing.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 680 ℃ the solder piece reheated fusing, it is stand-by to be cast into strip then.
Example 3: the Repone K and the 22 gram sodium-chlor, 22 of 56 grams are restrained cryolite powder (Na
3AlF
6) mixing salt waters on 295.8 gram Al-11.8Si alloys after the fusing down 820 ℃.Furnace temperature is transferred to 800 ℃, 84.29 pure Al of gram and the pure Cu of 99.75 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be pressed into rapidly in the middle of the above-mentioned molten alloy with bell jar with holes on the wall Al-6.2Er alloys, and constantly stir, till rare earth melts fully 20.16 grams.Be incubated 2 hours, stirred, make the alloy homogenizing every 15 minutes.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 680 ℃ the solder piece reheated fusing, it is stand-by to be cast into strip then.
Example 4: the Repone K and the 20 gram sodium-chlor mixing salts of 20 grams are watered on 14.39 gram Al-24.2Si alloys after the fusing down 720 ℃.Furnace temperature is risen to 800 ℃, 21.63 pure Al of gram and the pure Cu of 9.95 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be pressed into rapidly in the middle of the above-mentioned molten alloy with bell jar with holes on the wall Al-6.2Er alloys, and constantly stir, till rare earth melts fully 4.03 grams.Be incubated 2 hours, constantly stir, make the alloy homogenizing.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 700 ℃ the solder piece reheated fusing, it is stand-by to be cast into strip then.
Example 5: the Repone K and the 30 gram sodium-chlor mixing salts of 30 grams are watered on 21.17 gram Al-11.8Si alloys after the fusing down 700 ℃.Furnace temperature is risen to 800 ℃, 15.54 pure Al of gram and the pure Cu of 12.49 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be pressed into rapidly in the middle of the above-mentioned molten alloy with bell jar with holes on the wall Al-6.2Er alloy, and constantly stir, till rare earth melts fully 0.8064 gram.Be incubated 2 hours, constantly stir, make the alloy homogenizing.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 650 ℃ the solder piece reheated fusing, water stand-by into strips then.
Example 6: the Repone K and the 4.4 gram sodium-chlor, 4.4 of 11.2 grams are restrained cryolite powder (Na
3AlF
6) mixing salt waters on 42.33 gram Al-11.8Si alloys after the fusing down 820 ℃.Furnace temperature is risen to 850 ℃, 4.865 pure Al of gram and the pure Cu of 1.998 grams are joined in the middle of the Al-Si alloy liquid after making the fusing of Al-Si alloy and mixing salt, constantly stir simultaneously, form alloy; Be pressed into rapidly in the middle of the above-mentioned molten alloy with bell jar with holes on the wall Al-6.2Er alloy, and constantly stir, till rare earth melts fully 0.8064 gram.Be incubated 1 hour, constantly stir, make the alloy homogenizing.Leave standstill and come out of the stove, treat to remove surperficial mixing salt behind the alloy graining.Furnace temperature is reduced to 700 ℃ the solder piece reheated fusing, it is stand-by to be cast into strip then.
Table 1 solder composition and temperature of fusion
Example Al (%) Si (%) Cu (%) Er (%) liquidus temperature (℃) solidus temperature (℃)
Comparative Examples 1 73 7 20 0 537 525
Embodiment 1 72.950 7 20 0.05 536 524
Embodiment 2 72.9 7 20 0.1 537 526
Embodiment 3 72.75 7 20 0.25 538 525
Embodiment 4 72.5 7 20 0.5 536 526
Comparative Examples 2 70 5 25 0 527 512
Embodiment 5 69.9 5 25 0.1 526 514
Comparative Examples 3 86 10 40 569 556
Embodiment 6 85.9 10 4 0.1 571 558
Table 2 hardness and spreading area test-results
Hardness (HV) spreading area (mm
2)
Comparative Examples 1 165.2167 164.45
Embodiment 1 205.7429 225.02
Embodiment 2 207.225 209.20
Embodiment 3 198.3286 173.79
Embodiment 4 217.5111 209.79
Comparative Examples 2 167.8 181.3
Embodiment 5 133.6625 212.2
Comparative Examples 3 78.975 158.4
Embodiment 6 84.12 178.4
Claims (2)
1, rare earth Er contained Al-Si base intermediate temperature solder is characterized in that: contain weight percent and be 5～10% Si, and 4～25% Cu, and 0.05～0.5% rare earth Er, remaining is Al.
2, the preparation method of rare earth Er contained Al-Si base intermediate temperature solder is characterized in that, may further comprise the steps:
(1) the melting aluminum smelting agent is watered on the Al-Si alloy, melting dosage can cover the Al-Si alloy and get final product;
(2) temperature is risen to 750 ℃～850 ℃, treat the Al-Si alloy melting after, required fine aluminium, fine copper are joined in the fused Al-Si alloy liquid, stir, form the Al-Si-Cu alloy;
(3) treat its fusing evenly after, the Al-Er alloy is pressed in the above-mentioned alloy liquid, make its fusing and fully react with former liquation, be incubated 1～2 hour, stirring, static, cooled and solidified;
(4) solidify the smelting agent that the surface is removed in the back, temperature is reduced to 650～700 ℃ the solder piece is reheated fusing, and it is stand-by to cast then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410074341 CN1270865C (en) | 2004-09-10 | 2004-09-10 | Al-Si base medium temperature welding flux containing rare-earth Er and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410074341 CN1270865C (en) | 2004-09-10 | 2004-09-10 | Al-Si base medium temperature welding flux containing rare-earth Er and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1586794A true CN1586794A (en) | 2005-03-02 |
| CN1270865C CN1270865C (en) | 2006-08-23 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823190A (en) * | 2010-05-21 | 2010-09-08 | 桂林市银箭焊接材料有限公司 | Aluminium-silicon alloy welding wire and preparation method thereof |
| CN102021443A (en) * | 2010-10-15 | 2011-04-20 | 北京工业大学 | Al-Er-Zr alloy and ageing strengthening process thereof |
| CN103464927A (en) * | 2013-09-06 | 2013-12-25 | 河南理工大学 | Aluminum silicon copper cerium brazing filler metal for brazing of silicon carbide particle reinforced aluminum matrix composite material and preparation method thereof |
| CN105479032A (en) * | 2014-09-18 | 2016-04-13 | 河南理工大学 | Aluminum-silicon-copper-yttrium solder for silicon carbide particle reinforced aluminum matrix composite soldering and preparation method for aluminum-silicon-copper-yttrium solder |
| CN106001983A (en) * | 2016-06-02 | 2016-10-12 | 苏州钎谷焊接材料科技有限公司 | Medium-temperature aluminium alloy brazing filler metal |
| CN109158791A (en) * | 2018-09-25 | 2019-01-08 | 广东美的制冷设备有限公司 | Aluminum bronze solder, weld-ring and tubing |
| CN110587116A (en) * | 2019-10-21 | 2019-12-20 | 合肥工业大学 | Friction stir processing method for improving performance of 6063 aluminum alloy by adding Al-Er intermediate alloy |
| CN113020838A (en) * | 2021-04-06 | 2021-06-25 | 南昌航空大学 | Aluminum-based brazing filler metal, and preparation method and application thereof |
-
2004
- 2004-09-10 CN CN 200410074341 patent/CN1270865C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823190A (en) * | 2010-05-21 | 2010-09-08 | 桂林市银箭焊接材料有限公司 | Aluminium-silicon alloy welding wire and preparation method thereof |
| CN101823190B (en) * | 2010-05-21 | 2012-05-30 | 桂林市银箭焊接材料有限公司 | Aluminium-silicon alloy welding wire and preparation method thereof |
| CN102021443A (en) * | 2010-10-15 | 2011-04-20 | 北京工业大学 | Al-Er-Zr alloy and ageing strengthening process thereof |
| CN102021443B (en) * | 2010-10-15 | 2012-07-04 | 北京工业大学 | Al-Er-Zr alloy and ageing strengthening process thereof |
| CN103464927A (en) * | 2013-09-06 | 2013-12-25 | 河南理工大学 | Aluminum silicon copper cerium brazing filler metal for brazing of silicon carbide particle reinforced aluminum matrix composite material and preparation method thereof |
| CN103464927B (en) * | 2013-09-06 | 2015-11-18 | 河南理工大学 | A kind of aluminium copper silicon cerium solder for enhancing aluminum-base composite material by silicon carbide particles soldering and preparation method thereof |
| CN105479032A (en) * | 2014-09-18 | 2016-04-13 | 河南理工大学 | Aluminum-silicon-copper-yttrium solder for silicon carbide particle reinforced aluminum matrix composite soldering and preparation method for aluminum-silicon-copper-yttrium solder |
| CN106001983A (en) * | 2016-06-02 | 2016-10-12 | 苏州钎谷焊接材料科技有限公司 | Medium-temperature aluminium alloy brazing filler metal |
| CN106001983B (en) * | 2016-06-02 | 2021-08-06 | 苏州钎谷焊接材料科技有限公司 | Medium-temperature aluminum alloy brazing filler metal |
| CN109158791A (en) * | 2018-09-25 | 2019-01-08 | 广东美的制冷设备有限公司 | Aluminum bronze solder, weld-ring and tubing |
| CN110587116A (en) * | 2019-10-21 | 2019-12-20 | 合肥工业大学 | Friction stir processing method for improving performance of 6063 aluminum alloy by adding Al-Er intermediate alloy |
| CN113020838A (en) * | 2021-04-06 | 2021-06-25 | 南昌航空大学 | Aluminum-based brazing filler metal, and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1270865C (en) | 2006-08-23 |
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