CN103170759A - Aluminum welding powder and welding method thereof - Google Patents
Aluminum welding powder and welding method thereof Download PDFInfo
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- CN103170759A CN103170759A CN2013101192358A CN201310119235A CN103170759A CN 103170759 A CN103170759 A CN 103170759A CN 2013101192358 A CN2013101192358 A CN 2013101192358A CN 201310119235 A CN201310119235 A CN 201310119235A CN 103170759 A CN103170759 A CN 103170759A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 107
- 238000003466 welding Methods 0.000 title claims abstract description 107
- 239000000843 powder Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 14
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims abstract description 10
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 claims abstract description 7
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 claims abstract description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004411 aluminium Substances 0.000 claims description 70
- 239000000203 mixture Substances 0.000 claims description 14
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000356 contaminant Substances 0.000 claims description 4
- 229960004643 cupric oxide Drugs 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000003721 gunpowder Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 239000004020 conductor Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract 2
- 239000005751 Copper oxide Substances 0.000 abstract 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract 1
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract 1
- 229910000431 copper oxide Inorganic materials 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 16
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 239000010949 copper Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910004261 CaF 2 Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910006404 SnO 2 Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000002932 luster Substances 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910000091 aluminium hydride Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910000050 copper hydride Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000003832 thermite Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Abstract
The invention relates to aluminum welding powder and a welding method thereof, and belongs to the technical field of aluminum and aluminum alloy welding. The aluminum welding powder comprises the following components: by weight, copper oxide 17%-19%, vanadium pentoxide 12%-14%, stannic oxide 13%-15%, lithium sulfate 1%-2%, boron powder 3%-4%, calcium fluoride 2.5%-3%, and the balance is aluminum powder. According to the aluminum welding powder, heat-released welding of aluminum parent metal is achieved. The welding method of the aluminum welding powder has the advantages that power sources or gas sources or hot sources or energy sources are not required for welding, and the aluminum welding powder belongs to typical environment-friendly electricity-less welding materials; and the welding device is compact, light in weight, easy to carry, suitable for field operation, aerial operation and the like, and especially suitable for emergency repairing of aluminum conductors after disasters such as an earthquake and a snow disaster.
Description
Technical field
The present invention relates to a kind of aluminium welding powder and welding method thereof, belong to aluminium and aluminum alloy solder technology field.
Background technology
aluminium busbar is one of most important part in whole electrolytic aluminium factory building, direct current after rectification is incorporated into electrolytic cell by aluminium busbar, electrolytic cell has negative busbar, anode bus, riser bus bar and soft band bus, be in series by aluminium busbar between groove and groove, also has interbus between factory building and factory building, but the conductive aluminum bus often can unexpectedly damage aborning, need in time repair welding to the bus that damages, produce in order to avoid impact is normal, and the existence in magnetic field has produced very large negative effect to the enforcement with electric welding, cause whole welding process difficulty, appearance of weld is of poor quality, welding process can't be implemented.In addition, also there is certain defect in the connectivity problem of aluminum conductor, often adopts traditional method of attachment at present: electric welding, bolts and nuts connection, line ear and crimping.The shortcomings such as these interconnection techniques and product exist complex operation, connection is lack of standardization, quality is lower, unreliable conductor overheating easily occurs, line drop is excessive in the transmission of electricity process, and then cause that various electric faults even open circuit.
For effectively overcoming the above problems, relevant enterprise and professional person have carried out a large amount of test and study work to the welding procedure of aluminium and aluminium alloy both at home and abroad, and make some progress.The main method of repairing at present aluminium busbar is to adopt carbon arc welding to weld after falling electric current or power failure.Have a power failure and not only cause the minimizing of electrolytic aluminium output, energy consumption significantly to increase, also can increase noxious gas emission, cause environmental pollution.Denomination of invention is a kind of method of cast aluminium braze-welding, application number is that 94119278.4 patent discloses a kind of braze-welding method with all kinds of Birmasils of oxy-acetylene flame welding, although the method can realize the welding of aluminium alloy, but its complex operation, course of reaction is difficult to hold, and need extra heating, the requirement that discontented podomere can weld, and be not suitable for field work and the welding when emergent.
Along with the development of welding procedure, in recent years, heat release is welded into for study hotspot.The heat release welding is also referred to as the chamotte welding.Need not external power source or thermal source, be to utilize the chemical reaction of sweat soldering to produce high temperature solution, and discharge a kind of method that high heat is completed welding.Heat release welding chemical reaction velocity is very fast, only just can complete welding in several seconds.The heat of its generation is high, can effectively conduct to the welding position, and it is fused into one, and makes copper/copper, and copper/aluminium forms firmly molecule combination between copper/steel, aluminium/aluminium.
The heat release welding is in fact a kind of new technique that combines with solder technology from epidemic techniques, belongs to the category from the spreading welding technology, and it is simple and convenient that it has welding, high efficiency; Welding effect is good, and Weld Performance is good; The advantage such as applied widely.Although the heat release welding is widely applied, it but is subject to great restriction in welding of aluminum and field of aluminum alloys.This is to be that copper or the iron that adopts reproducibility active metal metal oxide as another kind of in reduction such as aluminium, magnesium (being generally the oxide of copper or iron) exothermic reaction to generate melting is realized welding as weld metal because welding powder is realized the principle of welding.Because aluminium itself is very active, be difficult to by other metal replacement out, and aluminum mother plate has rapid heat dissipation, the easy characteristic such as oxidation, to be considered to difficulty very large always from spreading exothermic reaction welding of aluminum and aluminium alloy mother metal so adopt.
Based on this, the present invention is intended to research and develop the novel aluminum welding powder, seeks new reaction system, realizes the moment heat release, rely on the excessive aluminium powder of heat melts, and product is discharged as welding slag, thus realization aluminium truly and the heat release welding of aluminium alloy.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of aluminium welding powder that can realize the aluminum and its alloy welding.
Aluminium welding powder of the present invention uses excessive aluminium powder, and emits large calorimetric by moment, melts excessive aluminium powder, as weld metal, thereby realizes heat release welding to aluminum and its alloy.
For reaching above purpose, composition and mass percent in novel aluminum welding powder of the present invention are: cupric oxide 17 ~ 19%, and vanadic anhydride 12 ~ 14%, tin ash 13 ~ 15%, lithium sulfate 1 ~ 2%, boron powder 3 ~ 4%, calcirm-fluoride 2.5 ~ 3%, all the other are aluminium powder.
It is better that the order number is all 200 ~ 300 order welding effects.
In this formula, redox reaction all can occur with aluminium powder in three kinds of oxides, realizes the moment heat release, and the heat release welding heat is large, and reduzate all has alloying action, improves welding point hardness; Reduzate copper can guarantee the electric conductivity that welding point is good in addition; Vanadium can increase the mobility of molten metal; Tin can reduce alloy melting point, strengthens the mobility of aluminium alloy, and tin has good wetability with aluminium, realizes good metallurgical binding between assurance weld seam and aluminum mother plate; Lithium sulfate has good hygroscopicity, can reduce or eliminate the defectives such as pore that cause because of a small amount of moisture in welding powder, and lithium sulfate and the aluminium powder heat of reaction larger, make weld penetration larger, metallurgical binding is more firm; Boron can reduce the fragility of weld metal, improves welding point toughness; Calcirm-fluoride plays fluxing effect, and reaction alundum (Al2O3) slag is afterwards effectively separated with aluminium alloy, purifies weld metal; In formula, aluminium powder is excessive, part aluminium and oxide reaction, and unnecessary aluminium dilutes thermite on the one hand, and absorption portion heat during fusing reduces the exothermic reaction liberated heat, prevents splash; Aluminium is also filled weld seam as weld metal on the other hand, makes the composition of weld metal similar as far as possible to mother metal.
Use the method for aluminium welding powder welding aluminum or aluminum alloy of the present invention, specifically comprise the following steps:
1) the preparation aluminium welding powder, stir;
2) aluminium to be welded is carried out pre-welding treatment, remove surface and oil contaminant and oxide-film;
3) bottom is opened foraminate charging mould and aluminium to be welded and assemble, require charging mould small hole at bottom part and aluminium region alignment to be welded;
4) aluminium is preheating to 200-300 ℃, and oven dry charging mould;
5) put catch at the charging mold bottom, cover aperture, with the welding powder mould of packing into, slightly flatten compacting;
6) sprinkle starting mix on welding powder, igniting, after the fusing of catch in the mould of feeding, high temperature fluent metal flow into aluminium zone to be welded by charging mould small hole at bottom part, can form good metallurgical binding after cooling.
Described aluminium to be welded can be placed on graphite base.The graphite base heat accumulation is more, can slow down the heat consume of aluminium, is beneficial to welding.
Described catch is tinfoil paper.
The composition of described starting mix is gunpowder.
The pre-welding treatment of described aluminium to be welded, concrete method for cleaning is first to wipe aluminium material surface greasy dirt to be welded with organic solvents such as acetone, gasoline, then brush the aluminium welding surface with brass wire brush or stainless steel wire brush, or with scraper, file cleaning welding surface, until aluminium exposes metallic luster.
Also can adopt following method: first remove the greasy dirt of aluminium material surface with organic solvents such as acetone, gasoline, kerosene, embathe the 10min left and right with 5%～10wt%NaOH solution of 40 ℃～70 ℃, then rinse with the clear water that flows, then use 30wt%HNO
3Solution pickling 3min cleans air-dry or low temperature drying with absolute ethyl alcohol after the clear water that flows rinses.
Adopt the modes such as oxy-acetylene rifle, electric furnace, tracklayer heater to the aluminium preheating.
When aluminium welding powder welding of aluminum of the present invention and aluminium alloy, relate to four kinds of exothermic reactions, be respectively aluminium and cupric oxide reaction displacement copper, aluminium and vanadic anhydride reaction displace vanadium, and aluminium and tin ash reaction displace tin, lithium sulfate and reactive aluminum heat release.
Aluminium powder in aluminium welding powder of the present invention is reducing agent, cupric oxide, and vanadic anhydride, tin ash, lithium sulfate is oxidant.
The present invention has following beneficial effect:
1, aluminium welding powder of the present invention is green welding material without the electricity cleaning, relies on the welding powder id reaction to produce high heat, effectively conducts to the welding position, and it is fused into one, and forms intermolecular combination.Welding powder based on the interface soakage principle, certainly spread principle and compound metallurgical principle and realize welding, need not other any power supplys, source of the gas, thermal source, the energy, belong to typical green without the electric welding material.
2, method of operating equipment is simple.During the welding of aluminum mother metal without any need for power supply and miscellaneous equipment; Need not high pressure, also need not protective atmosphere, only rely on mixed-powder combustion reaction liberated heat just can weld, high efficiency.Small volume and less weight, simple to operate.
3, applied widely.Due to the equipment small volume and less weight, easily carry.Therefore be applicable to the field, work high above the ground etc. also are specially adapted to earthquake, the emergency first-aid repair of the aluminum conductor after the disasters such as snow disaster.
Description of drawings
Fig. 1 is the reaction unit schematic diagram.Comprise charging mould (3), catch (4), aluminium to be welded (5) and graphite base (6).Be welding powder (2) and starting mix (1) in the charging mould.
The specific embodiment
To help to understand by the following description of the embodiments the present invention, but not limit content of the present invention.
Embodiment one:
At first the mass ratio according to 43:19:14:15:2:4:3 takes chemical pure Al (200 order), CuO (200 order), V successively
2O
5(200 order), SnO
2(200 order), Li
2SO
4(300 order), B (300 order), CaF
2(200 order) powder, and it is mixed, namely make aluminium welding powder.Then wipe aluminum mother plate surface and oil contaminant to be welded with acetone, then clear up welding surface with file, until mother metal exposes metallic luster.To feed mould and aluminum mother plate assembled, and aluminum mother plate is preheating to 300 ℃ afterwards, and oven dry charging mould.Put catch at the charging mold bottom, cover aperture, with the welding powder mould of packing into, slightly flatten compacting.Sprinkle starting mix on welding powder, igniting, after the fusing of catch in the mould of feeding, high temperature fluent metal flow into aluminum mother plate zone to be welded by charging mould small hole at bottom part, can form good metallurgical binding after to be cooled.
Embodiment two:
At first the mass ratio according to 43:19:14:15:2:4:3 takes chemical pure Al (200 order), CuO (200 order), V successively
2O
5(200 order), SnO
2(200 order), Li
2SO
4(300 order), B (300 order), CaF
2(200 order) powder, and it is mixed, namely make aluminium welding powder.Remove the greasy dirt on aluminium busbar surface with acetone, embathe aluminum mother plate welding surface 10min left and right with the 10%NaOH solution of 40 ℃, then use 30%HNO
3Then solution pickling 3min rinses with the clear water that flows, and cleans with absolute ethyl alcohol after the clear water that flows rinses, air-dry.To feed mould and aluminum mother plate assembled, and aluminum mother plate is preheating to 300 ℃ afterwards, and oven dry charging mould.Put catch at the charging mold bottom, cover aperture, with the welding powder mould of packing into, slightly flatten compacting.Sprinkle starting mix on welding powder, igniting, after the fusing of catch in the mould of feeding, high temperature fluent metal flow into aluminum mother plate zone to be welded by charging mould small hole at bottom part, can form good metallurgical binding after to be cooled.
Embodiment three:
At first the mass ratio according to 103:34:24:26:2:6:5 takes chemical pure Al (200 order), CuO (200 order), V successively
2O
5(200 order), SnO
2(200 order), Li
2SO
4(300 order), B (300 order), CaF
2(200 order) powder, and it is mixed, namely make aluminium welding powder.Then wipe aluminum mother plate surface and oil contaminant to be welded with acetone, then clear up welding surface with file, until mother metal exposes metallic luster.To feed mould and aluminum mother plate assembled, and aluminum mother plate is preheating to 300 ℃ afterwards, and oven dry charging mould.Put catch at the charging mold bottom, cover aperture, with the welding powder mould of packing into, slightly flatten compacting.Sprinkle starting mix on welding powder, igniting, after the fusing of catch in the mould of feeding, high temperature fluent metal flow into aluminum mother plate zone to be welded by charging mould small hole at bottom part, can form good metallurgical binding after to be cooled.
Embodiment four:
At first the mass ratio according to 103:34:24:26:2:6:5 takes chemical pure Al (200 order), CuO (200 order), V successively
2O
5(200 order), SnO
2(200 order), Li
2SO
4(300 order), B (300 order), CaF
2(200 order) powder, and it is mixed, namely make aluminium welding powder.Remove the greasy dirt on aluminium busbar surface with acetone, embathe aluminum mother plate welding surface 10min left and right with the 10%NaOH solution of 40 ℃, then use 30%HNO
3Then solution pickling 3min rinses with the clear water that flows, and cleans with absolute ethyl alcohol after the clear water that flows rinses, air-dry.To feed mould and aluminum mother plate assembled, and aluminum mother plate is preheating to 300 ℃ afterwards, and oven dry charging mould.Put catch at the charging mold bottom, cover aperture, with the welding powder mould of packing into, slightly flatten compacting.Sprinkle starting mix on welding powder, igniting, after the fusing of catch in the mould of feeding, high temperature fluent metal flow into aluminum mother plate zone to be welded by charging mould small hole at bottom part, can form good metallurgical binding after to be cooled.
Claims (7)
1. an aluminium welding powder, is characterized in that, composition wherein and mass percent are: cupric oxide 17 ~ 19%, and vanadic anhydride 12 ~ 14%, tin ash 13 ~ 15%, lithium sulfate 1 ~ 2%, boron powder 3 ~ 4%, calcirm-fluoride 2.5 ~ 3%, all the other are aluminium powder.
2. aluminium welding powder according to claim 1, is characterized in that, all one-tenth subhead numbers are all 200 ~ 300 orders.
3. right to use requires the method for 1 described aluminium welding powder welding aluminum or aluminum alloy, it is characterized in that, comprises the following steps:
1) the preparation aluminium welding powder, stir;
2) aluminium to be welded is carried out pre-welding treatment, remove surface and oil contaminant and oxide-film;
3) bottom is opened foraminate charging mould and aluminium to be welded and assemble, require charging mould small hole at bottom part and aluminium region alignment to be welded;
4) aluminium is preheating to 200-300 ℃, and oven dry charging mould;
5) put catch at the charging mold bottom, cover aperture, with the welding powder mould of packing into, slightly flatten compacting;
6) sprinkle starting mix on welding powder, igniting, after the fusing of catch in the mould of feeding, high temperature fluent metal flow into aluminium to be welded zone to be welded by charging mould small hole at bottom part, can form good metallurgical binding after cooling.
4. method according to claim 3, is characterized in that, described aluminium to be welded is placed on graphite base.
5. method according to claim 3, is characterized in that, described catch is tinfoil paper.
6. method according to claim 3, is characterized in that, the composition of described starting mix is gunpowder.
7. method according to claim 3, is characterized in that, adopts oxy-acetylene rifle, electric furnace or tracklayer heater to aluminium preheating to be welded.
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|---|---|---|---|
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| CN104043913A (en) * | 2014-06-24 | 2014-09-17 | 国家电网公司 | Exothermic welding powder for welding novel grounding grid materials |
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| CN105040031A (en) * | 2015-08-27 | 2015-11-11 | 武汉大学 | Non-power-outage repairing method for aluminum electrolysis cell short circuit busbar |
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| CN106541246A (en) * | 2016-09-27 | 2017-03-29 | 新疆众和股份有限公司 | The method that aluminum cell bus-bar sweat soldering is repaired under electromagnetic field environment |
| CN107186375A (en) * | 2017-07-29 | 2017-09-22 | 安徽华众焊业有限公司 | A kind of aluminium welding powder |
| CN107378302A (en) * | 2017-07-31 | 2017-11-24 | 安徽华众焊业有限公司 | A kind of non-corrosive aluminium welding powder |
| CN107378301A (en) * | 2017-07-31 | 2017-11-24 | 安徽华众焊业有限公司 | A kind of non-corrosive aluminium welding powder |
| CN107457500A (en) * | 2017-09-19 | 2017-12-12 | 浙江昌泰电力电缆有限公司 | A kind of heat release welding powder and its welding method suitable for copper conductor welding |
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| CN110932049A (en) * | 2019-11-15 | 2020-03-27 | 东莞市输变电工程公司 | Combustion connection method for cable |
| CN113399866A (en) * | 2021-06-11 | 2021-09-17 | 武汉大学 | Aluminum electrolysis cell horizontal bus hot-line repair welding flux and preparation method thereof |
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