CN108213652A - A kind of certainly molten PTIG welding methods of magnesium/aluminium alloy dissimilar metal - Google Patents
A kind of certainly molten PTIG welding methods of magnesium/aluminium alloy dissimilar metal Download PDFInfo
- Publication number
- CN108213652A CN108213652A CN201711467768.XA CN201711467768A CN108213652A CN 108213652 A CN108213652 A CN 108213652A CN 201711467768 A CN201711467768 A CN 201711467768A CN 108213652 A CN108213652 A CN 108213652A
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- magnesium
- welding
- aluminium sheet
- plate
- ptig
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Classifications
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
- B23K9/232—Arc welding or cutting taking account of the properties of the materials to be welded of different metals
Abstract
The invention discloses a kind of certainly molten PTIG welding methods of magnesium/aluminum dissimilar metal, this method is using non-melt pole pulsed tungsten argon arc weld(ing) as welding heat source, pure zinc foil is added between magnesium alloy and aluminium alloy as middle layer, using aluminium sheet upper, joint form of the magnesium plate under fills metal, by controlling welding condition without welding wire etc., fusion zinc layers and magnesium plate are dropped down under after the fusing of electric arc heated aluminium sheet, realize magnesium alloy aluminium alloy different metal materials without filler wire from fusion welding.By controlling zinc intermediate layer thickness, improve wetting and spreading ability of the molten aluminum in magnesium plate, effectively prevent magnesium, aluminium element phase counterdiffusion and the brittleness magnesium aluminium intermetallic compound that is formed, improve the welding quality of magnalium special metal welding point, ultimately form appearance of weld beauty.This method welding equipment is simple and easy to get, of low cost, and production efficiency is high, has higher practical productive value.
Description
Technical field
The invention belongs to welding technology fields, and in particular to a kind of magnesium/aluminium alloy dissimilar metal welds welding side from molten PTIG
Method.
Background technology
While with the modern industries such as aerospace, automobile, ship and scientific and technical fast development, environmental pollution pressure
Power is aggravated and the huge consumption of the energy has been increasingly becoming the significant problem that today's society faces.It realizes energy saving, efficient, safe and environment-friendly
And energy sustainable development is the most important subject of development of modern industry, and lightweight is to realize the most effective approach of target.Profit
Traditional steel material is replaced with light material structure, dead weight can be mitigated to achieve the purpose that reduce energy loss.Wherein magnesium alloy
It is had excellent performance due to its density is small with aluminium alloy, becomes the first choice of lightweight structure material.Magnesium alloy and aluminium alloy application field
Popularity and intercrossing, Mg/Al dissimilar metals structural member is even more inevitable in application process.Such as in terms of military project,
Magnalium layer-built armor is exactly the high shock resistance energy of high specific strength and magnesium alloy that aluminium alloy is utilized.
The welding of magnesium alloy and aluminium alloy always is welding problem, using welding manners such as Laser Welding, agitating friction welderings
And strictly control welding parameter can obtain Mg/Al xenogenesis connectors, but it is expensive, adaptability is not high.Using non-melt pole
Pulse gas-shielded weldering (PTIG) has the characteristics that efficient, high-quality, low consumption, but directly weldering magnesium alloy and aluminium alloy can generate greatly
The big magnesium aluminium intermetallic compound of the brittleness of amount, has seriously affected quality of weld joint.It can be seen that it is directly welded by traditional TIG welderings
Magnesium alloy and aluminium alloy are difficult to obtain effective Mg/Al xenogenesis connector.
Invention content
The present invention be in order to solve magnesium/aluminum alloy different-metal material welding difficulty, it is expensive the problems such as, and provide
A kind of magnesium/aluminium alloy dissimilar metal realizes the low cost of magnesium alloy-aluminium alloy different metal materials from molten PTIG welding methods
The welding of high quality.
A kind of magnesium/aluminum dissimilar metal of the present invention is as follows from molten PTIG welding methods：
(1) plank is handled：It is gone after oxide film dissolving with acetone rinsing and is dried with polish magnesium plate and aluminium sheet of angle grinder；Zinc foil is used
Alkali wash water cleaning is gone after oxide film dissolving with acetone rinsing and is dried；
(2) plank assembles：The position to be welded of magnesium plate, aluminium sheet and zinc foil is cleaned using acetone, magnesium plate and aluminium sheet are assembled into
Lap joint of the aluminium sheet in upper, magnesium plate under, and lap width 15mm, zinc foil are placed between magnesium plate and aluminium sheet, part to be welded are consolidated
It is scheduled on red copper backing plate and is welded；
(3) welding gun assembles：Welding gun is above aluminium sheet, the position of height distance aluminium sheet 1.5mm~2mm, apart from aluminium sheet side
Edge 1.5m~2mm, and 65 °~75 ° of welding gun and aluminium sheet angle；
(4) welding process：The position to be welded of magnesium plate, aluminium sheet and zinc foil is cleaned using acetone, is by magnesium plate and aluminium sheet assembling
Lap joint of the aluminium sheet in upper, magnesium plate under, zinc foil are placed between magnesium plate and aluminium sheet；It is enterprising that part to be welded is fixed on red copper backing plate
Row PTIG weldering welding.
Further, for the protection gas used in welding for pure argon, flow is 10~20L/min, welding current for 140~
220A, speed of welding are 30mm/min~90mm/min.
Further, in step (1), the thickness of zinc middle layer is 0.1mm~0.4mm, width 15mm.
Further, in step (1), alkali washing method is：Zinc foil, time are cleaned using the NaOH solution of a concentration of 35g/L
For 50~80s.It is cleaned after alkali cleaning with clear water, acetone wiping surface is dried up with hair-dryer.
Further, welding gun is above aluminium sheet, the position of height distance aluminium sheet 1.5mm, and 75 ° of welding gun and aluminium sheet angle.
Further, the source of welding current is DC reverse connection, for removing plate surface oxidation film.
Further, fusing lower plate magnesium base material is dropped down without filler wire from tip-off using aluminum mother plate in welding process.
The present invention has remarkable advantage compared with the prior art：
1st, method of the invention carries out the welding of magnesium alloy-aluminium alloy dissimilar metal, simply easy using PTIG welding equipments
It reaches, it is of low cost, it is easy to operate, and good magnesium/aluminium xenogenesis connector can be obtained simultaneously.2nd, can have in the addition of zinc middle layer
The optimization seam organization of effect becomes equiax crystal including eliminating the coarse dendrite at joint interface, reduces chemical combination between magnesium-aluminum metal
The generation of object improves magnesium alloy-aluminum alloy joint performance.3rd, the present invention can be in the Mg/Al lap joints of no macroscopic cracking；Together
When, it does not fill silk more cost-effective and be conveniently operated from melting welding, simplifies equipment.
Description of the drawings
Fig. 1 is the assembling schematic diagram of the embodiment of the present invention 1；
Wherein, 1 is PTIG welding guns, and 2 be aluminum alloy plate materials, and 3 be pure zinc middle layer, and 4 be magnesium alloy plate；
Fig. 2 connects rear joint interface scanning electron microscope with aluminium alloy for 1 magnesium alloy of the embodiment of the present invention；
Fig. 3 connects 800 times of rear joint section scanning electron microscope (SEM) photograph with aluminium alloy for 1 magnesium alloy of the embodiment of the present invention；
Fig. 4 is the surface topography map of weld seam after magnesium alloy is connected with aluminium alloy.
Specific embodiment
The technology of the present invention method is not limited to the specific embodiment of act set forth below, further include each specific embodiment it
Between arbitrary combination.
The concrete technology scheme of the present invention is as follows：
(1) plank is handled：Zinc 50~80s of foil is cleaned with alkali wash water before welding, is dried up after cleaning acetone wiping with cleaning；With
Angle grinder polishing magnesium plate and aluminium sheet, remove surface film oxide, then dried up after being cleaned with acetone.
(2) magnesium alloy and aluminium alloy be using overlapping mode, and for aluminium sheet upper, magnesium plate takes the zinc foil of 0.1mm~0.4mm under
In between, it is fixed on red copper liner plate and clamps, make the gap between three kinds of materials small as possible.
(3) PTIG welding guns are above aluminium sheet, the position of height distance aluminium sheet 1.5mm~2mm, and control welding gun is from aluminium sheet edge
Distance is 1.5mm~2mm, and 75 ° of welding gun and aluminium sheet angle.Using DC reverse connection and logical high-purity argon gas is as protection gas, air-flow
It measures as 10~20L/min.
(3) welding condition range：140~220A of welding current, weldingvoltage cooperate with matching with welding current, can lead to
It overregulates welding gun height and suitably adjusts weldingvoltage, speed of welding is 30mm/min~90mm/min.Speed of welding is too fast to be led
Cause incomplete fusion and stomata, the defects of control welding parameter can avoid undercut, incomplete fusion.
Embodiment 1
Method using the present invention carries out the welding of magnesium alloy-aluminium alloy dissimilar metal, magnesium alloy AZ31B used in this example
Thickness is 4mm, and aluminium alloy 6061T thickness is 4mm, and pure zinc middle layer is 0.2mm.First to wlding and centre before welding starts
Layer carries out deoxidation film process, and zinc 50~80s of foil is cleaned with alkali wash water, is dried up after cleaning acetone wiping with cleaning；Use angle grinder
Magnesium plate of polishing and aluminium sheet remove surface film oxide, then are dried up after being cleaned with acetone.
By aluminum alloy plate materials 2 of the present invention, zinc middle layer 3 and magnesium alloy plate 4 assemble as shown in Figure 1, are fixed on
In welding platform, clamp.For PTIG welding guns 1 as shown in Figure 1 above aluminium sheet, the position of height distance aluminium sheet 1.8mm controls welding gun
It is 1.5mm from aluminium sheet Edge Distance, and 75 ° of welding gun and aluminium sheet angle.Protection gas is used as using DC reverse connection and logical high-purity argon gas,
Throughput is 10~20L/min.Welding current is 190A, weldingvoltage 45V, speed of welding 40cm/min.
The defects of appearance of weld pattern after Fig. 2 is connected for magnesium alloy with aluminium alloy, surface pore-free, occlusion.Fig. 3 is
Magnesium alloy connects 800 times of rear joint section stereoscan photograph with aluminium alloy：Wherein I is magnesium alloy base material heat affected area, and II is
At the nearly magnesium base material of weld seam, tissue signature is magnesium zinc eutectic structure, and III is magnesium zinc intermetallic compound.IV is aluminium zinc eutectic group
It knits.It learns through XRD and energy spectrum analysis and greatly reduces in commissure magnesium aluminium intermetallic compound, weld seam phase composition is magnesium sosoloid,
The compositions such as magnesium zinc intermetallic compound, aluminium solid solution.
Embodiment 2
The welding of magnesium alloy-aluminium alloy dissimilar metal is carried out with the method for the present invention, magnesium alloy AZ31B used in this example is thick
It spends for 4mm, aluminium alloy 6061T thickness is 4mm, and pure zinc middle layer is 0.4mm.First to wlding and middle layer before welding starts
Deoxidation film process is carried out, zinc 50~80s of foil is cleaned with alkali wash water, is dried up after cleaning acetone wiping with cleaning；It is beaten with angle grinder
Magnesium plate and aluminium sheet are ground, removes surface film oxide, then dried up after being cleaned with acetone.
By aluminum alloy plate materials 2 of the present invention, zinc middle layer 3 and magnesium alloy plate 4 assemble as shown in Figure 1, are fixed on
In welding platform, clamp.For PTIG welding guns 1 as shown in Figure 1 above aluminium sheet, the position of height distance aluminium sheet 1.8mm controls welding gun
It is 1.5mm from aluminium sheet Edge Distance, and 75 ° of welding gun and aluminium sheet angle.Protection gas is used as using DC reverse connection and logical high-purity argon gas,
Throughput is 10~20L/min.Welding current is 190A, weldingvoltage 45V, speed of welding 40cm/min.
The defects of appearance of weld pattern after Fig. 4 is connected for magnesium alloy with aluminium alloy, surface pore-free, occlusion.
Claims (7)
1. the certainly molten PTIG welding methods of a kind of magnesium/aluminum dissimilar metal, which is characterized in that include the following steps：
(1) plank is handled：It is gone after oxide film dissolving with acetone rinsing and is dried with polish magnesium plate and aluminium sheet of angle grinder；Zinc foil alkali cleaning
Liquid cleaning is gone after oxide film dissolving with acetone rinsing and is dried；
(2) plank assembles：The position to be welded of magnesium plate, aluminium sheet and zinc foil is cleaned using acetone, magnesium plate and aluminium sheet are assembled into aluminium sheet
In lap joint of the upper, magnesium plate under, and lap width 15mm, zinc foil are placed between magnesium plate and aluminium sheet, part to be welded are fixed on
It is welded on red copper backing plate；
(3) welding gun assembles：Welding gun is above aluminium sheet, the position of height distance aluminium sheet 1.5mm~2mm, apart from aluminium sheet edge
1.5m~2mm, and 65 °~75 ° of welding gun and aluminium sheet angle；
(4) welding process：The position to be welded of magnesium plate, aluminium sheet and zinc foil is cleaned using acetone, is aluminium sheet by magnesium plate and aluminium sheet assembling
In lap joint of the upper, magnesium plate under, zinc foil is placed between magnesium plate and aluminium sheet；Part to be welded is fixed on red copper backing plate and is carried out
PTIG weldering welding.
2. the certainly molten PTIG welding methods of magnesium/aluminum dissimilar metal according to claim 1, which is characterized in that adopted in welding
Protection gas is pure argon, and flow is 10~20L/min, and welding current is 140~220A, speed of welding for 30mm/min~
90mm/min。
3. the certainly molten PTIG welding methods of magnesium/aluminum dissimilar metal according to claim 1, which is characterized in that step (1)
In, the thickness of zinc middle layer is 0.1mm~0.4mm, width 15mm.
4. the certainly molten PTIG welding methods of magnesium/aluminum dissimilar metal according to claim 1, which is characterized in that step (1)
In, alkali washing method is：Zinc foil is cleaned using the NaOH solution of a concentration of 35g/L, the time is 50~80s.It is washed after alkali cleaning with clear water
Only, acetone wiping surface, is dried up with hair-dryer.
5. the certainly molten PTIG welding methods of magnesium/aluminum dissimilar metal according to claim 1, which is characterized in that welding gun is in aluminium
Above plate, the position of height distance aluminium sheet 1.5mm, and 75 ° of welding gun and aluminium sheet angle.
6. the certainly molten PTIG welding methods of magnesium/aluminum dissimilar metal according to claim 1, which is characterized in that the source of welding current
For DC reverse connection, for removing plate surface oxidation film.
7. the certainly molten PTIG welding methods of magnesium/aluminum dissimilar metal according to claim 1, which is characterized in that welding process
It is middle that fusing lower plate magnesium base material is dropped down without filler wire from tip-off using aluminum mother plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711467768.XA CN108213652A (en) | 2017-12-29 | 2017-12-29 | A kind of certainly molten PTIG welding methods of magnesium/aluminium alloy dissimilar metal |
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| CN201711467768.XA CN108213652A (en) | 2017-12-29 | 2017-12-29 | A kind of certainly molten PTIG welding methods of magnesium/aluminium alloy dissimilar metal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950508A (en) * | 2018-07-23 | 2018-12-07 | 河北工业大学 | A kind of high strength anti-corrosion aluminium containing middle layer/magnesium different alloys connector and preparation method thereof |
| CN109909613A (en) * | 2019-04-17 | 2019-06-21 | 上海应用技术大学 | Improve the process of heterogeneity aluminum alloy Laser Welding welding joint mechanical property |
| CN111054926A (en) * | 2019-12-03 | 2020-04-24 | 同济大学 | Zn solder reinforced interface aluminum/magnesium/aluminum composite board and powder hot-pressing preparation method |
| CN111168204A (en) * | 2020-02-12 | 2020-05-19 | 西安理工大学 | Copper-steel dissimilar metal welding method with preset nickel sheets |
| CN111927910A (en) * | 2020-06-18 | 2020-11-13 | 北京遥感设备研究所 | Aluminum-magnesium alloy integrated multifunctional integrated structure |
| CN112872528A (en) * | 2021-03-25 | 2021-06-01 | 吉林大学 | Dissimilar metal ultrasonic-assisted eutectic reaction brazing method |
| CN113664330A (en) * | 2021-08-31 | 2021-11-19 | 江南造船(集团)有限责任公司 | Continuous welding method for transition area of corrugated plate and angle steel of fuel tank |
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| CN102615396A (en) * | 2012-02-16 | 2012-08-01 | 山东大学 | Filling wire inert gas protective welding method for magnesium alloy pipe and aluminum alloy pipe |
| CN103286483A (en) * | 2013-07-05 | 2013-09-11 | 王满玉 | Argon tungsten-arc welding method for magnesium alloys |
| CN103372710A (en) * | 2012-04-14 | 2013-10-30 | 兰州理工大学 | Cold metal transition melting-brazing welding connection method for dissimilar magnesium metal and aluminum metal |
| CN103600180A (en) * | 2013-11-14 | 2014-02-26 | 北京航空航天大学 | Surface stripping agent capable of realizing aluminum-magnesium alloy flawless direct-current positive polarity welding |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101351298A (en) * | 2005-11-21 | 2009-01-21 | 株式会社神户制钢所 | Method for joining members of different kinds |
| CN102615396A (en) * | 2012-02-16 | 2012-08-01 | 山东大学 | Filling wire inert gas protective welding method for magnesium alloy pipe and aluminum alloy pipe |
| CN103372710A (en) * | 2012-04-14 | 2013-10-30 | 兰州理工大学 | Cold metal transition melting-brazing welding connection method for dissimilar magnesium metal and aluminum metal |
| CN103286483A (en) * | 2013-07-05 | 2013-09-11 | 王满玉 | Argon tungsten-arc welding method for magnesium alloys |
| CN103600180A (en) * | 2013-11-14 | 2014-02-26 | 北京航空航天大学 | Surface stripping agent capable of realizing aluminum-magnesium alloy flawless direct-current positive polarity welding |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950508A (en) * | 2018-07-23 | 2018-12-07 | 河北工业大学 | A kind of high strength anti-corrosion aluminium containing middle layer/magnesium different alloys connector and preparation method thereof |
| CN109909613A (en) * | 2019-04-17 | 2019-06-21 | 上海应用技术大学 | Improve the process of heterogeneity aluminum alloy Laser Welding welding joint mechanical property |
| CN111054926A (en) * | 2019-12-03 | 2020-04-24 | 同济大学 | Zn solder reinforced interface aluminum/magnesium/aluminum composite board and powder hot-pressing preparation method |
| CN111168204A (en) * | 2020-02-12 | 2020-05-19 | 西安理工大学 | Copper-steel dissimilar metal welding method with preset nickel sheets |
| CN111927910A (en) * | 2020-06-18 | 2020-11-13 | 北京遥感设备研究所 | Aluminum-magnesium alloy integrated multifunctional integrated structure |
| CN112872528A (en) * | 2021-03-25 | 2021-06-01 | 吉林大学 | Dissimilar metal ultrasonic-assisted eutectic reaction brazing method |
| CN113664330A (en) * | 2021-08-31 | 2021-11-19 | 江南造船(集团)有限责任公司 | Continuous welding method for transition area of corrugated plate and angle steel of fuel tank |
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Application publication date: 20180629 |