CN101947702B - Novel brazing flux-containing aluminum alloy soldering wire and preparation method thereof - Google Patents
Novel brazing flux-containing aluminum alloy soldering wire and preparation method thereof Download PDFInfo
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- CN101947702B CN101947702B CN 201010288311 CN201010288311A CN101947702B CN 101947702 B CN101947702 B CN 101947702B CN 201010288311 CN201010288311 CN 201010288311 CN 201010288311 A CN201010288311 A CN 201010288311A CN 101947702 B CN101947702 B CN 101947702B
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Abstract
The invention discloses a brazing flux-containing aluminum alloy soldering wire and a preparation method thereof, which belong to the technical field of brazing materials. The soldering wire consists of uniformly mixed aluminum silicon brazing material powder and fluoride brazing flux powder, wherein the content of the aluminum silicon brazing material powder is 93 to 85 percent; the content of fluoride brazing flux powder is 7 to 15 percent; the aluminum accounts for 88 percent and the silicon accounts for 12 percent of the aluminum silicon brazing material powder; the fluoride brazing flux powder is potassium aluminum fluoride mixed salt consisting of KF-AlF3 series; and the molar ratio of AlF3 to KF is 44.5 to 55.5. The preparation process comprises the following steps of: preparing the aluminum silicon brazing material powder and the fluoride brazing flux powder; uniformly mixing the two kinds of powder, and performing cold isostatic pressing and vacuum sintering to prepare a blank; and extruding and drawing the blank on a thermal extruder to obtain a product. The soldering wire and the method have the advantages of shortening processing time and reducing waste treatment, along with high surface accuracy, no need of head rolling machine between passes, high material utilization ratio and high performance of soldering process.
Description
Technical field
The present invention relates to a kind of Novel brazing flux-containing aluminum alloy soldering wire and preparation method thereof, belong to technical field of soldering materials.
Background technology
In recent years, along with developing rapidly of automobile, air-conditioning, refrigeration industry, with aluminium for copper, obtain encouraging progress with aluminium for steel.The gas brazing of aluminium matter refrigeration accessory, especially aluminium alloy tube joint and connector is widely used.When adopting gas brazing, this welding point must coat scaling powder at welding wire or surface of the work, with removing the aluminium oxide on surface.At present, the gas brazing method that adopts aluminium alloy welding wire to add scaling powder outside auxiliary has scaling powder addition and uppity shortcoming of interpolation time.For addressing this problem, someone proposes to adopt the conduct of tubulose flux-cored wire from the brazing flux welding material.Add hard problem although this method can solve scaling powder, the easy moisture absorption in slit of this kind tubulose flux-cored wire, core powder easily are scattered and core scaling powder and the uniform not shortcoming of external metallization composition, thereby affect welding quality.
Summary of the invention
For the problems referred to above of present solid wire and the existence of tubulose flux-cored wire, someone proposes with the method for powder metallurgy solder and brazing flux homogenious charge compression to be made blank, and then the method manufacturing with hot extrusion contains the brazing flux aluminium alloy welding wire.Yet the required extruding force of the method for only using hot extrusion is very large, and extrusion speed is very slow, easily cracks, and surface quality is not good.The welding wire extrusion ratio that can extrude is very less, and will prepare thinner welding wire, only depends on extruding to be difficult to realize.The object of the invention is to solve the problems referred to above of existing manufacturing technology, a kind of Novel brazing flux-containing aluminum alloy soldering wire and preparation method thereof is provided.
A kind of Novel brazing flux-containing aluminum alloy soldering wire of the present invention is characterized in that it is by the al-si filler metal powder that mixes and fluoride flux powder constituent, and the al-si filler metal content of powder is 93%～85%, and the fluoride flux content of powder is 7%～15%; Aluminium content is 88% in the described al-si filler metal powder, and silicone content is 12%; Described fluoride flux powder is by KF-AlF
3The potassium fluoroaluminate mixed salt that system consists of, wherein AlF
3With the mol ratio of KF be 44.5: 55.5; Described al-si filler metal granularity is-45+105 μ m that described fluoride flux powder size is-25+45 μ m.Above-mentioned content is weight percentage.The above-mentioned brazing flux aluminum alloy welding filament diameter 2mm that contains.
A kind of Novel brazing flux-containing aluminum alloy soldering wire preparation method of the present invention is as follows:
(1) powder metallurgy-hot extrusion-hubbing
Step 1, with Al-Si alloy heat fused, the refining and degassed in induction furnace for preparing, metal liquid stream flows in the sprayer unit through leting slip a remark, directly sprayed into apart from nozzle approximately in the High-Pressure Water of 200mm by the molten drop after the gases at high pressure fragmentation, after cooling, the Al-Si powder slurries screen cloth of flowing through filters out thick metal and foreign material, flow in the drier of High Rotation Speed and carry out processed, drying, sieving makes granularity and is the spherical powder of-45+105 μ m;
Step 2 is 44.5: 55.5 AlF with quantitative mol ratio
3Evenly mix with KF, put into crucible heating to 550 ℃, make its melting, then insulation 20min is cooled to room temperature.With mechanical milling method cooled scaling powder being ground to granularity is-25+45 μ m;
Step 3: al-si filler metal powder and the fluoride flux powder of step 1 and step 2 preparation were evenly mixed in 93: 7 in mass ratio～85: 15, then vacuum-packed for subsequent use;
Step 4 is suppressed 5min with cold isostatic press at 150Mp～250Mp with mixed uniformly powder, then puts into 10
-2In the Pa vacuum sintering furnace, become the blank of diameter 40mm in 2～4 hours at 400 ℃～500 ℃ lower sintering, cool to room temperature with the furnace;
Step 5, the blank that step 4 is made are placed on 100 tons the heat extruder with extrusion ratio 64: 1, extrusion speed 2.2m/min, and 350 ℃～450 ℃ of extrusion temperatures are extruded the line base that diameter is 5mm;
Step 6, with line base welding wire take hauling speed 3.7m/min process multi-pass tube reducing as 2mm on the disk wire drawing machine, then surperficial ungrease treatment is the finished product welding wire.
(2) powder metallurgy-hot extrusion-method of swaging
Different from (1) method is: step 6, with line base welding wire take feed speed 5m/min process multi-pass tube reducing as 2mm on swager, then surperficial ungrease treatment is the finished product welding wire.
More directly with hot extrusion method, adopt the method manufacturing welding wire of hot extrusion-cold drawing that following several advantage is arranged: 1, surface quality is high, few cut; 2, can be processed into thinner welding wire; 3, required extruding force is smaller.Except inheriting the former advantage, adopting the method for hot extrusion-swage to make welding wire more has following several advantage: 1, surface accuracy is high; 2, do not need between passage, to use grinding machine, can shorten process time; 3, stock utilization is high, reduces waste disposal.
The aluminium welding wire of these two kinds of method manufacturings can be used for the gas brazing that aluminium alloy is made in the job site, can be used for furnace brazing, also can be used for the repair welding of the less demanding aluminium sheet of welding quality and foundry goods.Through check, welding technological properties is good, need not add solder flux before the weldering, and postwelding need not cleared up, and conveniently saves trouble.
Specific embodiment
Embodiment 1:
Step 1, with Al-Si alloy heat fused, the refining and degassed in induction furnace for preparing, metal liquid stream flows in the sprayer unit through leting slip a remark, directly sprayed into apart from nozzle approximately in the High-Pressure Water of 200mm by the molten drop after the gases at high pressure fragmentation, after cooling, the Al-Si powder slurries screen cloth of flowing through filters out thick metal and foreign material, flow in the drier of High Rotation Speed and carry out processed, drying, sieving makes granularity and is the spherical powder of-45+105 μ m;
Step 2 is 44.5: 55.5 AlF with quantitative mol ratio
3Evenly mix with KF, put into crucible heating to 550 ℃, make its melting, then insulation 20min is cooled to room temperature.With mechanical milling method cooled scaling powder being ground to granularity is-25+45 μ m;
Step 3, with al-si filler metal powder and the in mass ratio evenly mixing in 93: 7 of fluoride flux powder of step 1 and step 2 preparation, then vacuum-packed for subsequent use;
Step 4 is suppressed 5min with cold isostatic press at 150Mp with mixed uniformly powder, then puts into 10
-2In the Pa vacuum sintering furnace, become the blank of diameter 40mm in 2 hours at 400 ℃ of lower sintering, cool to room temperature with the furnace;
Step 5, the blank that step 4 is made are placed on 100 tons the heat extruder with extrusion ratio 64: 1, extrusion speed 2.2m/min, and 350 ℃ of extrusion temperatures are extruded the line base that diameter is 5mm;
Step 6, (5 → 4.11 → 3.78 → 2.48 → 2mm) tube reducings are as the welding wire of 2mm, and then surperficial ungrease treatment is the finished product welding wire through 4 passages take hauling speed 3.7m/min on the disk wire drawing machine with the line base.
Embodiment 2
As different from Example 1: step 3, with al-si filler metal powder and the in mass ratio evenly mixing in 85: 15 of fluoride flux powder of step 1 and step 2 preparation, then vacuum-packed for subsequent use;
Step 4 is suppressed 5min with cold isostatic press at 250Mp with mixed uniformly powder, then puts into 10
-2In the Pa vacuum sintering furnace, become the blank of diameter 40mm in 2 hours at 500 ℃ of lower sintering, cool to room temperature with the furnace;
Step 5, the blank that step 4 is made are placed on 100 tons the heat extruder with extrusion ratio 64: 1, extrusion speed 2.2m/min, and 450 ℃ of extrusion temperatures are extruded the line base that diameter is 5mm;
Step 6, (welding wire of 5 → 4.25 → 3.25 → 2.56 → 2mm) tube reducings as tube reducing as 2mm, then surperficial ungrease treatment is the finished product welding wire through 4 passages take hauling speed 3.7m/min on the disk wire drawing machine with the line base.
Embodiment 3
Other are with embodiment 1, as different from Example 1: step 6, (5 → 4.15 → 2.56 → 2mm) tube reducings are as the welding wire of 2mm, and then surperficial ungrease treatment is the finished product welding wire through 3 passages take feed speed 5m/min on swager with the line base.
Embodiment 4
Other are with embodiment 2, as different from Example 2: step 6, (5 → 3.98 → 2.78 → 2mm) tube reducings are as the welding wire of 2mm, and then surperficial ungrease treatment is the finished product welding wire through 3 passages take feed speed 5m/min on swager with the line base.
Claims (2)
1. one kind contains brazing flux aluminium alloy welding wire preparation method, it is characterized in that, may further comprise the steps:
Step 1, with Al-Si alloy heat fused, the refining and degassed in induction furnace for preparing, metal liquid stream flows in the sprayer unit through leting slip a remark, directly sprayed in the High-Pressure Water apart from nozzle 200mm by the molten drop after the gases at high pressure fragmentation, after cooling, the Al-Si powder slurries screen cloth of flowing through filters out thick metal and foreign material, flow in the drier of High Rotation Speed and carry out processed, drying, sieving makes granularity and is the spherical powder of-45+105 μ m;
Step 2 is 44.5: 55.5 AlF with quantitative mol ratio
3Evenly mix with KF, put into crucible heating to 550 ℃, make its melting, then insulation 20min is cooled to room temperature; With mechanical milling method cooled scaling powder being ground to granularity is-25+45 μ m;
Step 3: al-si filler metal powder and the fluoride flux powder of step 1 and step 2 preparation were evenly mixed in 93: 7 in mass ratio～85: 15, then vacuum-packed for subsequent use;
Step 4 is suppressed 5min with cold isostatic press at 150Mp～250Mp with mixed uniformly powder, then puts into 10
-2In the Pa vacuum sintering furnace, become the blank of diameter 40mm in 2～4 hours at 400 ℃～500 ℃ lower sintering, cool to room temperature with the furnace;
Step 5, the blank that step 4 is made are placed on 100 tons the heat extruder with extrusion ratio 64: 1, extrusion speed 2.2m/min, and 350 ℃～450 ℃ of extrusion temperatures are extruded the line base that diameter is 5mm;
Step 6, with line base welding wire take hauling speed 3.7m/min process multi-pass tube reducing as 2mm on the disk wire drawing machine, then surperficial ungrease treatment is the finished product welding wire.
2. a kind of preparation method who contains the brazing flux aluminium alloy welding wire according to claim 1 is characterized in that, step 6 replaces with:
Step 6, with line base welding wire take feed speed 5m/min process multi-pass tube reducing as 2mm on swager, then surperficial ungrease treatment is the finished product welding wire.
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| CN 201010288311 CN101947702B (en) | 2010-09-21 | 2010-09-21 | Novel brazing flux-containing aluminum alloy soldering wire and preparation method thereof |
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| CN 201010288311 CN101947702B (en) | 2010-09-21 | 2010-09-21 | Novel brazing flux-containing aluminum alloy soldering wire and preparation method thereof |
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| CN101947702A CN101947702A (en) | 2011-01-19 |
| CN101947702B true CN101947702B (en) | 2013-04-17 |
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Families Citing this family (15)
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| CN102990241B (en) * | 2012-08-24 | 2015-07-22 | 张�林 | Metal powder welding material special for high-frequency welding machine |
| CN103286481B (en) * | 2013-05-21 | 2015-10-21 | 抚顺东工冶金材料技术有限公司 | A kind of machining manufacture of novel solid welding wire |
| CN105081601A (en) * | 2014-05-06 | 2015-11-25 | 烟台市固光焊接材料有限责任公司 | Preparation method for low-temperature copper aluminum solder and low-temperature copper aluminum solder |
| CN105499831B (en) * | 2015-12-19 | 2018-11-13 | 佛山市益宏焊接有限公司 | A kind of aluminium base welding wire |
| CN105436748B (en) * | 2015-12-19 | 2018-11-13 | 佛山市益宏焊接有限公司 | A kind of production technology of aluminium base welding wire |
| CN105598603A (en) * | 2016-03-18 | 2016-05-25 | 江门市上庆自动化设备有限公司 | Method for adding scaling powder into solder |
| CN106392383B (en) * | 2016-11-16 | 2018-07-27 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of aluminium base flux-cored wire and preparation method thereof |
| CN106624472B (en) * | 2017-01-12 | 2019-02-01 | 中国航空工业集团公司北京航空材料研究院 | A method of aluminium alloy flux-cored wire is manufactured using canned powder extrution method for producing unfired clay ware blank |
| CN107030412B (en) * | 2017-05-17 | 2019-12-10 | 常州鑫力航金属新材料有限公司 | environment-friendly corrosion-free self-brazing ring for aluminum alloy brazing and preparation method thereof |
| CN108213768A (en) * | 2018-01-08 | 2018-06-29 | 浙江亚通焊材有限公司 | A kind of novel almit flux-cored wire |
| CN111378849B (en) * | 2018-12-27 | 2022-04-08 | 南京理工大学 | Preparation method of industrial pure aluminum conductor |
| CN111015016A (en) * | 2019-12-05 | 2020-04-17 | 渤海造船厂集团有限公司 | Welding wire for ultra-low carbon martensite non-consumable electrode gas shielded welding |
| CN111139384A (en) * | 2019-12-31 | 2020-05-12 | 上海交通大学 | Welding wire for high-strength 7xxx aluminum alloy and composite material and preparation method thereof |
| CN112792478A (en) * | 2021-01-06 | 2021-05-14 | 李珮豪 | Self-fluxing aluminum brazing filler metal plate and manufacturing method thereof |
| CN113441872A (en) * | 2021-07-09 | 2021-09-28 | 江苏科技大学 | Copper alloy composite welding material and preparation method thereof |
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| CN1701905A (en) * | 2005-06-23 | 2005-11-30 | 上海交通大学 | Non-solder brass solder coating material for aluminium product |
| CN101190478A (en) * | 2006-11-22 | 2008-06-04 | 上海斯米克焊材有限公司 | Aluminium and aluminium alloy tubular welding wire for gas welding and preparation method thereof |
| EP1977851A1 (en) * | 2007-04-04 | 2008-10-08 | General Electric Company | Brazing formulation and method of making the same |
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Patent Citations (4)
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| CN1121855A (en) * | 1994-07-22 | 1996-05-08 | 昭和铝株式会社 | Method of making an aluminum alloy brazing agent containing a flux |
| CN1701905A (en) * | 2005-06-23 | 2005-11-30 | 上海交通大学 | Non-solder brass solder coating material for aluminium product |
| CN101190478A (en) * | 2006-11-22 | 2008-06-04 | 上海斯米克焊材有限公司 | Aluminium and aluminium alloy tubular welding wire for gas welding and preparation method thereof |
| EP1977851A1 (en) * | 2007-04-04 | 2008-10-08 | General Electric Company | Brazing formulation and method of making the same |
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