CN103447664A - Welding method for gas shielded welding of aluminium-alloy vehicle body - Google Patents
Welding method for gas shielded welding of aluminium-alloy vehicle body Download PDFInfo
- Publication number
- CN103447664A CN103447664A CN2013103530128A CN201310353012A CN103447664A CN 103447664 A CN103447664 A CN 103447664A CN 2013103530128 A CN2013103530128 A CN 2013103530128A CN 201310353012 A CN201310353012 A CN 201310353012A CN 103447664 A CN103447664 A CN 103447664A
- Authority
- CN
- China
- Prior art keywords
- welding
- aluminium
- mother metal
- arc
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a welding method for gas shielded welding of an aluminium-alloy vehicle body. The welding method comprises the following specific steps of: in welding, spraying a layer of pasty welding agent on an assembled welding seam base material in advance, wherein the pasty welding agent is 10-15mm in width and 50-200mum in thickness; when the welding agent entering a low-temperature area at the periphery of the temperature field of the arc reaches the melting temperature (560 DEG C) along with the movement of welding arc along the direction of a welding seam, immediately melting the welding agent into a liquid film, quickly wetting the surface of the base material, removing an oxidation film on the surface of the base material, and then covering the surface of the base material and the surface of metal in a molten pool. The welding method disclosed by the invention has the advantages that the welding process can be finished only by using the heat inputted in arc welding to melt the base material with the melting point of being 570-640 DEG C and welding wires as electrodes; aluminium-alloy MIG gas shielded welding connection of the high-strength vehicle body can be realized only by inputting low heat, the process is excellent, and the performance of joints is stable and good.
Description
Technical field
The invention belongs to aluminium alloy gas shielded arc welding technical field of welding materials, be specifically related to a kind of welding method of protecting weldering for aluminum alloy bodywork gas.
Background technology
In recent years, enforcement along with the adjustment of China's automotive industrial policy and new forms of energy policy, low-carbon environment-friendly policy, and the development of rail vehicle high-speed and high-efficiency traffic, adopt high strength, high tenacity, anticorrosion aluminium to substitute steel, adopt thin-wall complicated section aluminium section bar and sheet stamping constructed of aluminium part as car body materials simultaneously, become and realized the light-weighted main path of car body.Because the car body manufacture is the industry that is welded as leading technique, the manufacturing development degree of depth of aluminum alloy bodywork has promoted the fast development of aluminium solder technology, promoted China's aluminium wlding industry restructuring simultaneously, strided forward to welding power from welding big country with sane paces.
Aluminum current alloy car body covering component and stamping parts with the most 5000 Al-Mg alloys that are that adopt of material, the concrete trade mark is as 5083 rustproof aluminum alloys etc., the car body aluminium section bar be take the 6000 Al-Mg-Si alloys that are as main, the small-sized aluminium section bar that wherein automobile is used 6063 wrought aluminiums that adopt more, the cross dimensions of used for rail vehicle reaches 6005 wrought aluminiums that adopt of the above large aluminum profile of 300mm more; To heavily loaded aluminium section bar, covering and sheet metal component also 7000 Al-Zn that are commonly used-Mg alloy, as 7005 superduralumins etc.Between car body aluminium covering and aluminium covering, or mostly be the welding between metal of the same race between aluminium section bar and aluminium section bar, but the normal welding that different grade aluminium alloys occur between covering and aluminium section bar.
The material of body framing thick general≤3mm, the material of covering is thick usually≤2mm.Mostly be argon gas (or mist of argon gas+helium) protection weldering for car body Welded technique at present, gage of wire is 0.8mm-1.6mm, and the most frequently used is 1.0mm or 1.2mm.At present the degree of China's automatic welding is also lower, semi-automatic or manual welding is also commonplace, but automatic welding technique is fast-developing, progressively eliminates semi-automatic and manual welding.
At present domestic is traditional aluminium-magnesium alloy welding wire for the wlding that welds the aluminium-magnesium alloy mother metal, mainly contains ER5356, ER5183 etc.Traditional aluminium alloy electric arc-welding is to rely on electric arc to smash the aluminum alloy surface oxide-film, and there are a lot of negative effects in this technology.Because the oxide-film fusing point is very high, Al
2o
32050 ℃ of fusing points, 2825 ℃ of the fusing points of MgO, approach 5 times higher than the fusing point of mother metal itself, and compact structure, non-conductive, hinder intermetallic fusion; Oxide-film also contains large quantity of moisture, and after being decomposed by electric arc, hydrogen is adsorbed in the molten metal in molten bath, and after the molten metal cooled and solidified, hydrogen is separated out and formed bubble.During arc-welding, electric arc need to be inputted a large amount of heats to mother metal and just can smash oxide-film, completes welding process.But too much heat input, at first caused the distortion of mother metal physical dimension shape distortion overproof, the Welding Structure assembling coordinates difficulty, the covering that material is thinner, warpage is more serious, and it is invalid even to correct, and causes product rejection, for reducing distortion and preventing that thermic arc from burning, usually to carry out the manufacturability thickening to mother metal; The 2nd, the oxide-film fragment smashed by electric arc not fusing disappears, but stir, is incorporated in molten pool metal, becomes the slag inclusion in weld metal after cooling.Because oxide-film is not combined with metal, itself is exactly a micro-crack.Be subject to the effect of thermal stress in cooling procedure, micro-crack further expands becomes macroscopical bead crack.Particularly the stable of welding arc must rely on the oxide-film fragment existed in molten pool metal, and this makes in weld metal to exist oxide inclusions to have certainty; The 3rd, after originally being present in hydrone in oxide-film and being decomposed by electric arc, thereby a large amount of hydrogen is adsorbed in molten pool metal and take interface that oxide-film is the bubble forming core and aggregates into rapidly bubble hydrogen and form pore.The 4th, due to the too much heat input of welding arc, caused the scope of the weld seam proximity thermal zone of influence larger, influence degree is darker, cause weld heat-affected zone intensity too low, the 60%-70% that only has mother metal self intensity, the intensity of aluminum alloy of heat treatment reinforcement reduces more, when technological design, for the bearing capacity of holding workpiece, has to mother metal is carried out to the manufacturability thickening.The 5th, because the input heat is too much, evaporation of metal and powder amount increase, and the problems such as environmental protection occur.
Due to above-mentioned comprehensive reason, traditional aluminium alloy electric welding technology, too much wasted on the one hand and manufactured the high-quality raw material of car body and valuable after welding treatment man-hour, also greatly extended on the other hand life cycle of the product, product quality is not high, also reduce the effect of car body loss of weight, directly affected the manufacturing development of aluminum alloy bodywork.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of welding method of protecting weldering for aluminum alloy bodywork gas, the present invention only needs input low in calories just can realize the soldered method connect of high strength car body aluminum alloy MIG gas guarantor, and technique is excellent, joint performance is stable good.
The technical scheme that realizes the object of the invention is:
A kind of operation principle of the aluminium-magnesium alloy welding wire welding for aluminum alloy bodywork gas guarantor weldering is to peel off and dissolve oxide-film by the solder flux be coated in advance on the mother metal joint by the heat of arc temperature field low-temperature space, and electric arc only need be inputted lower heat just can filler wire and the reliable welding of mother metal realization.
A kind of welding method for aluminum alloy bodywork gas guarantor weldering comprises the following steps: when welding, spray in advance one deck solder flux, coating width 10-15mm, thickness 50-200 μ m on the weld seam mother metal assembled; Along with welding arc moves along bead direction, enter the solder flux that arc temperature encloses low-temperature space outside the venue and reach its fusion temperature (560-570 ℃), fusing immediately forms transparent liquid film, rapidly wetting mother metal surface place to go mother metal surface film oxide, cover subsequently mother metal and molten pool metal surface, the heat of welding arc input only need to melt mother metal that fusing point is 570-640 ℃ and, as the aluminium-magnesium alloy welding wire of electrode, just can complete welding process.
The main chemical compositions percentage by weight of described solder flux: Nocolok(KAlF
4+ K
3alF
6eutectic) 95%+CsF5%, the polyethylene glycol { HO (CH that solder powder is 200-400 by molecular weight after mixing
2cH
2o)
nh} reconciles into pasty state as carrier, the 20-30% that the weight of carrier polyethylene glycol is pasty state solder flux gross weight.
The preparation method of described solder flux comprises the following steps:
Press Nocolok(KAlF
4+ K
3alF
6eutectic) proportional quantity of 95%+CsF5%, take Nocolok(KAlF
4+ K
3alF
6eutectic) and CsF dry powder being stirred with powder mixer, then take polyethylene glycol that molecular weight is 200-400 as carrier by the 20-30% that mixes the solder flux gross weight, polyethylene glycol and solder flux are reconciled into to pasty state, viscosity, to meet spraying or to brush and be advisable, is carried out package encapsulation with plastic tank.
Described aluminium-magnesium alloy welding wire, the chemical component weight percentage of aluminium-magnesium alloy welding wire is: Al:92-97%; Mg:3-6%; Mn:0.5-1.0%; Cr:0.10-0.35%; Ti:0.05-0.25%; Zr:0.05-0.25%; Ce:0.01-0.1%.
The preparation method of described aluminium-magnesium alloy welding wire, specifically comprise the steps:
1) melting and the refining of aluminium-magnesium weld line alloy:
To at 400 ℃ of preheatings proportional quantity commercial-purity aluminium (aluminium ingot) of 4 hours, drop into the black-fead crucible resistance furnace, be heated to aluminium ingot when softening at 850～880 ℃, be sprinkled into aluminium-magnesium alloy melting special melting agent dry powder and cover, adjust temperature after fusing to 700-740 ℃, pass into dry N on liquid aluminum in crucible
2carry out deoxygenation, then by proportional quantity, by the graphite bell jar, add in two batches the intermediate alloy fragments such as Al-Mn, Al-Mg, Al-Cr, Al-Ti, Al-Zr, Al-Ce, the graphite bell jar moves around in the depths from the about 150mm of crucible bottom, until fusing.After intermediate alloy melts fully, with quartz pushrod, stir 3-4min, carry out refining.Adopt " SNIF " no hydrogen bubble refinery practice that swims during refining, by one can vertical lift, rotation, with the refining pipe of graphite shower nozzle, be blown into " Ar from crucible bottom to alloy melt
2+ C
2cl
6" gas-solid body admixture refining agent, refining melt 5～15min, scratch clean slag after standing 10min, obtains pure aluminium-magnesium alloy melt stand-by.Described aluminium-magnesium alloy special melting agent is conventional the selection, can be specifically calcirm-fluoride (CaF
2) 20% and carnallite (MgCl.KC) 80%.Addition is to add 3～5% of furnace charge gross weight in fashionable crucible smelting furnace; The refining agent carbon trichloride is blown into from the melt bottom by the argon gas with pressure, and the pressure that passes into of described argon gas is 3～5KPa; The weight of carbon trichloride is 0.2～0.3% of melt weight.
2) continuous casting and rolling of aluminium-magnesium alloy welding wire wire drawing bar base
Be installed on the stifled valve of quartz of refining furnace bottom by unlatching, the aluminium-magnesium alloy melt that the step 1 refining is completed discharges out of the furnace under nitrogen protection, the guiding gutter of flowing through enters casting ladle, stably pour into the crystallizing wheel chamber of continuous casting machine, cast the trapezoidal strand billot that sectional dimension is (15+10.5) * 9; Strand, after the roller shearing machine is wiped out overlap, enters tandem mill, through the continuous rolling of four-pass, obtains the thick drawing stock of diameter ф 8mm.
3) wire drawing
The thick drawing stock of aluminium-magnesium alloy of step (2) gained diameter ф 8mm, by the drawing of a set of wire drawing unit 7 passages, is obtained to the smart drawing stock of diameter ф 3.2mm.The line base, after the eddy-current heating stress annealing, then is drawn into by tower 18 passage fine wire drawing machines normal dia that diameter can be regulation in " GB/T 10858 aluminium and aluminium alloy welding wire ".
4) surface finish is processed
Step 3 gained aluminium-magnesium alloy welding wire is carried out to the surface finish processing, and its technological process is: degreasing one water cleans chemical polishing one water and cleans dedust one hot water wash one hot blast drying.
Wherein the degreasing process condition is: sulfuric acid (98%) 10%-20%(mass ratio), and temperature 60-80 ℃, time 10-12s.
The process conditions of chemical polishing are: phosphoric acid (85%) 75.0%; Sulfuric acid (98%) 11.0%; Nitric acid (65%) 6.7%; Self-control additive 7.5%; Temperature 100-120 ℃, time 20-30s.Concrete composition and the proportioning of self-control additive wherein are: CuSO
45 H
2o is 0.02%, urea 3.1%, auxiliary agent T 4.4%.Auxiliary agent T is Sulfates inorganic compound (being white in color Powdered), can further improve the viscosity of polishing fluid, the more important thing is and can in solution, form colloidal cpd.
The process conditions of dedust: potassium bichromate solution (mass fraction) 1%-5%; Normal temperature, the time: 15-20s.
The process conditions of hot blast drying, hot blast temperature 100-120 ℃, time: 15s.
5) packing
Adopt wire reel by cable machine, the clean welding wire of step 4 gained light to be coiled and the heat shrinkage film packing, get product.
The technical conditions of packing reach the requirement of moisture-proof anticorrosive erosion.
Advantage of the present invention is:
1, aluminium-magnesium alloy welding wire QT21 is comprised of aluminium-magnesium alloy welding wire and special flux, its welding job principle is to peel off and dissolve oxide-film by the solder flux be coated in advance on the mother metal joint by the heat of arc temperature field low-temperature space, and electric arc only need be inputted lower heat just can filler wire and the reliable welding of mother metal realization.Because the input heat is few and concentrated, that weldment (mother metal) is out of shape is little, correct than being easier to; Heat affected area is little, and strength of joint reduction amplitude reduces, and weld metal do not have crackle, be mingled with and the defect such as pore, and strength of joint is high, metal splash and powder amount little, the working environment health.Weld seam is little, and surfacing does not need too many polishing.Whole welding procedure is applicable to the welding of thin plate, and mother metal is not needed to the manufacturability thickening, can save the automobile-used aluminium alloy of a large amount of high-qualitys, and with short production cycle, production efficiency is high.
2, the chemical composition of aluminium-magnesium alloy welding wire QT21 is: Al:92-97%; Mg:3-6%; Mn:0.5-1.0%; Cr:0.10-0.35%; Ti:0.05-0.25%; Zr:0.05-0.25%; Ce:0.01-0.1%.On the method for designing of chemical composition, adopt polynary composite micro-alloyed strengthening and toughening mechanism of, the one-tenth of having optimized the aluminium-magnesium alloy welding wire is grouped into, make aluminium-magnesium alloy on the matrix of Al main solid solution the atom of Mg, Mn two elements, formed the solid solution metal of non-heat treatment reinforcement, the intensity of matrix is very high; By adding various trace elements Cr, Ti, Zr, Ce etc., form that multiple performance is different, small-sized, the metallurgical particulate of very high density, play the effect that heterogeneous forming core and machinery hinder grain growth, refinement after welding wire and welding thereof with the grain structure of the weld seam of mother metal formation, fully improved the mechanical performance index such as intensity, toughness of welding wire and weld seam; Stack simultaneously utilizes the favourable metallurgical phenomenon of each element, improves to greatest extent the welding technological properties of welding wire, thereby obtains combination property than the superior a lot of aluminium-magnesium alloy welding wire of other product of the same type.
3, the solder flux chemical composition of aluminium-magnesium alloy welding wire QT21 is: Nocolok(K
3alF
6+ KAlF
4eutectic) 95%+CsF5%, the carrier that solder flux is adhered on weld seam is polyethylene glycol { HO (CH
2cH
2o)
nh, its proportional quantity is for mixing the 20-30% of solder flux gross weight.In the various materials of above-mentioned mixing, K
3alF
6the fusing point of individualism is 995 ℃, KAlF
4fusing point during individualism is 572 ℃, but both fusing points while forming the eutectic thing are 558 ℃.Wherein only has KAlF
4the reaction of participation striping, in the striping process, quantity is consumed minimizing; K
3alF
6chemical property is relatively stable, does not participate in the striping reaction, and in the striping process, quantity progressively increases, and keeps the mobility of solder flux on the mother metal surface, and mother metal and molten pool metal are shielded.KAlF
4can remove the moisture discharged from oxide-film simultaneously, avoid its analyte H
2be inhaled in molten pool metal.Chemical equation is:
2KAlF
4+3H
2O=2KF+Al
2O
3+6HF↑
The Al that reaction generates
2o
3become Powdered slag and swim in the molten pool metal surface, the cooling rear welding slag that finally becomes.
682 ℃ of the fusing points of CsF, active large, the main mechanism with chemical reaction and aluminium, magnesia film reaction, play the striping effect.
8CsF+Al
2O
3+MgO=4Cs
2O+2AlF
3+MgF
2；
CsF+2AlF
3+Mg=CsMgAlF
6+AlF。
CsMgAlF
6performance is relatively stable, at mother metal and molten pool metal surface, shields.Due to the effect of solder flux, not only removed oxide-film but also protected mother metal and molten pool metal, not by secondary oxidation, greatly reduced splashing of metal.Promote the seam effect of metal simultaneously, improved welding quality.
4, aluminium-magnesium alloy welding wire QT21 has adopted novel glossing, makes welding wire surface fineness reach the minute surface level, further improves the welding technological properties of welding wire.
5, aluminium-magnesium alloy welding wire QT21 adopts strict dry and " iron-free " smelting technology, adopts " Ar
2+ C
2cl
6" gas-solid body admixture refining agent and " SNIF " no hydrogen bubble refinery practice that swims, Fe, H in aluminium-magnesium alloy welding wire metal
2reach other oxide inclusions and all be subject to strict control, welding wire metal inherent quality is good; Adopt the technology of continuous casting and rolling and continuous wire drawing, production efficiency is high, lumber recovery is high, the welding wire comprehensive quality is good simultaneously.
6, method of the present invention is equally applicable to the arc welding of the industries such as shipbuilding, machine-building.
The specific embodiment
Below by embodiment, the invention will be further elaborated, but therefore do not limit protection scope of the present invention.Below take a kind of aluminium-magnesium alloy welding wire QT21 that protects weldering for aluminum alloy bodywork gas and describe as example.
Embodiment 1:
A kind of aluminium-magnesium alloy welding wire QT21 that protects weldering for aluminum alloy bodywork gas, it is comprised of QT21 aluminium-magnesium alloy welding wire and QT21 solder flux.The diameter of QT21 aluminium-magnesium alloy welding wire is ф 1.0mm, and surface smoothness reaches minute surface, and the weight portion of chemical composition is: Al:93.68; Mg:5.1; Mn:0.75; Cr:0.2; Ti:0.12; Zr:0.12; Ce:0.03.QT21 solder flux chemical analysis is: Nocolok(K
3alF
6+ KAlF
4eutectic): 95%, CsF:5%, the polyethylene glycol that carrier is molecular weight 200, its proportional quantity accounts for and mixes 30% of solder flux gross weight.
The preparation method of above-mentioned aluminium-magnesium alloy welding wire QT21, carry out according to following step:
1, melting and refining:
To at 400 ℃ of preheatings proportional quantity commercial-purity aluminium (aluminium ingot) of 4 hours, drop into the black-fead crucible resistance furnace, be heated to aluminium ingot when softening at 870 ℃, be sprinkled into aluminium-magnesium alloy melting special melting agent dry powder and cover, adjust temperature to 720 ℃ after fusing, pass into dry N on liquid aluminum in crucible
2carry out deoxygenation, then by proportional quantity, use the graphite bell jar to add in two batches the intermediate alloys such as Al-Mn, Al-Mg, Al-Cr, Al-Ti, Al-Zr, Al-Ce, the graphite bell jar moves around in the depths from the about 150mm of crucible bottom, until fusing.After intermediate alloy melts fully, with quartz pushrod, stir 4min, carry out refining.Adopt " SNIF " no hydrogen bubble refinery practice that swims during refining, by one can vertical lift, rotation, with the refining pipe of graphite shower nozzle, be blown into " Ar from crucible bottom to alloy melt
2+ C
2cl
6" gas-solid body admixture refining agent, refining melt 11min, scratch clean slag after standing 10min, obtains pure aluminium-magnesium alloy melt stand-by.Described aluminium-magnesium alloy special melting agent is conventional the selection, can be specifically calcirm-fluoride (CaF
2) 20% and carnallite (MgCl.KC) 80%.Addition is to add 3% of furnace charge gross weight in fashionable crucible smelting furnace; The refining agent carbon trichloride is blown into from the melt bottom by the argon gas with pressure, and the pressure that passes into of described argon gas is 5KPa; The weight of carbon trichloride is 0.3% of melt weight.
By completing the alloy melt casting coupon of refining, to be surveyed sample, its chemical component weight percentage is: Mg:5.1%; Mn:0.75%; Cr:0.2%; Ti:0.12%; Zr:0.12%; Ce:0.03%.Al: surplus.
2, continuous casting and rolling is rolled:
Be installed on the stifled valve of quartz of refining furnace bottom by unlatching, the aluminium-magnesium alloy melt that the step 1 refining is completed discharges out of the furnace under nitrogen protection, the guiding gutter of flowing through enters casting ladle, stably pours into the crystallizing wheel chamber of continuous casting machine, casts cross section for the trapezoidal strand billot in (15+10.5) * 9; Strand, after the roller shearing machine is wiped out overlap, enters the tandem rolling unit, through the continuous rolling of four-pass, obtains the thick drawing stock of diameter ф 8mm.
3, wire drawing
The thick drawing stock of aluminium-magnesium alloy of step (2) gained diameter ф 8mm, by the drawing of a set of wire drawing unit 7 passages, is obtained to the smart drawing stock of diameter ф 3.2mm.The line base, after the eddy-current heating stress annealing, then is drawn into the aluminium-magnesium alloy welding wire of ф 1.0 by tower 18 passage fine wire drawing machines.
4, welding wire surface polishing
Step 3 gained aluminium-magnesium alloy welding wire is processed through surface finish, and its technological process is: degreasing one water cleans chemical polishing one water and cleans dedust one hot water wash one hot blast drying.
Wherein the degreasing process condition is: sulfuric acid (98%) 15%(mass ratio), and temperature 70 C, time 11s.
The process conditions of chemical polishing are: phosphoric acid (85%) 75.0%; Sulfuric acid (98%) 11.0%; Nitric acid (65%) 6.7%; Self-control additive 7.5%; 110 ℃ of temperature, time 25s.Concrete composition and the proportioning of self-control additive wherein are: CuSO
45 H
2o is 0.02%, urea 3.1%, auxiliary agent T 4.4%.
The process conditions of dedust: potassium bichromate solution (mass fraction) 3%; Normal temperature, the time: 17s.
Welding wire surface fineness after polishing reaches minute surface.
The step of preparation solder flux
Press Nocolok(KAlF
4+ K
3alF
6eutectic) 95%+CsF5%, proportional quantity, take Nocolok(KAlF
4+ K
3alF
6eutectic) and CsF dry powder being stirred with powder mixer, then take polyethylene glycol that molecular weight is 200 as carrier by 25% of solder flux gross weight, polyethylene glycol and solder flux are reconciled into to pasty state, viscosity is to meet spraying or brushing is advisable, packed with hermetically sealed can, got product.
Embodiment 2:
As different from Example 1, the weight portion of aluminium-magnesium alloy welding wire QT21 chemical composition is: Mg:5.0; Mn:0.7; Cr:0.18; Ti:0.10; Zr:0.10; Ce:0.03.Al: surplus.
During preparation: step 1, the intermediate alloys such as Al-Mg, Al-Mn, Al-Cr, Al-Ti, Al-Zr and Al-Ce are added in the fine aluminium liquid of fusing under 700 ℃ of conditions simultaneously, all intermediate alloys all melt and stir 3 minutes, pass into argon gas (Ar
2) and hexachloroethanc ring (C
2cl
6) skim after refining 10 minutes standing 15min.By completing the alloy melt casting coupon of refining, to be surveyed sample, its chemical component weight percentage is: Mg:5.0%; Mn:0.7%; Cr:0.18%; Ti:0.10%; Zr:0.10%; Ce:0.03%.Al: surplus.All the other are with embodiment 1.
Embodiment 3:
As different from Example 1: the weight portion of aluminium-magnesium alloy welding wire QT21 chemical composition is: Mg:4.9, Mn:0.65, Cr:0.15, Ti:0.09, Zr:0.15, Ce:0.02, Al: surplus.
The ratio of described solder flux and carrier (polyethylene glycol of molecular weight 400) is 7.5:2.5.
During preparation: step will be added in the fine aluminium liquid of fusing under 710 ℃ of conditions of intermediate alloy such as Al-Mg, Al-Mn, Al-Cr, Al-Ti, Al-Zr and Al-Ce simultaneously, and all intermediate alloys all melt rear stirring 3 minutes, pass into argon gas (Ar
2) and hexachloroethanc ring (C
2cl
6) refining 12 minutes, carry out continuous casting and rolling and wire drawing polishing after slagging-off, choose sample from product, the weight portion of its chemical composition of selective examination chemical composition is: Mg:4.9, Mn:0.65, Cr:0.15, Ti:0.09, Zr:0.15, Ce:0.02, Al: surplus.All the other are with embodiment 1.
Embodiment 4
As different from Example 1: the weight portion of aluminium-magnesium alloy welding wire QT21 chemical composition is: Mg:5.3, Mn:0.8, Cr:0.25, Ti:0.08, Zr:0.18, Ce:0.04, Al: surplus, the diameter of welding wire is ф 1.2mm, and the weight ratio of described solder flux and carrier (polyethylene glycol of relative molecular weight 200) is: 7:3, all the other are with embodiment 1.
Embodiment 5:
As different from Example 1: the weight portion of aluminium-magnesium alloy welding wire QT21 chemical composition is: Mg:5.4, Mn:0.6, Cr:0.22, Ti:0.14, Zr:0.2, Ce:0.03, Al: surplus, the diameter of welding wire is ф 0.8mm, and the weight ratio of described solder flux and carrier (polyethylene glycol of relative molecular weight 200) is: 7.5:2.5, all the other are with embodiment 1.
Embodiment 6:
As different from Example 1: the weight portion of aluminium-magnesium alloy welding wire QT21 chemical composition is: Mg:5.:1, Mn:0.9, Cr:0.23, Ti:0.15, Zr:0.15, Ce:0.02, Al: surplus.The diameter of welding wire is ф 0.8mm, and the weight ratio of described solder flux and carrier (polyethylene glycol of relative molecular weight 200) is: 7.3:2.7, all the other are with embodiment 1.
Claims (4)
1. a welding method of protecting weldering for aluminum alloy bodywork gas is characterized in that specifically comprising the following steps:
Step 1), when welding, sprays one deck solder flux in advance on the weld seam mother metal assembled;
Step 2) along with welding arc moves along bead direction, enter the solder flux that arc temperature encloses low-temperature space outside the venue, reach its fusion temperature, fusing immediately forms liquid film, rapidly wetting mother metal surface place to go mother metal surface film oxide, cover mother metal and molten pool metal surface subsequently.
2. a kind of welding method of protecting weldering for aluminum alloy bodywork gas according to claim 1, is characterized in that the described coating width of step 1 10-15mm, thickness 50-200 μ m.
3. a kind of welding method of protecting weldering for aluminum alloy bodywork gas according to claim 1, is characterized in that the heat of welding arc input only need to reach the mother metal that filler wire and fusing point are 570-640 ℃.
4. a kind of welding method of protecting weldering for aluminum alloy bodywork gas according to claim 1, the fusion temperature that it is characterized in that described step 2 is 560 ℃-600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103530128A CN103447664A (en) | 2013-08-14 | 2013-08-14 | Welding method for gas shielded welding of aluminium-alloy vehicle body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103530128A CN103447664A (en) | 2013-08-14 | 2013-08-14 | Welding method for gas shielded welding of aluminium-alloy vehicle body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103447664A true CN103447664A (en) | 2013-12-18 |
Family
ID=49730714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103530128A Pending CN103447664A (en) | 2013-08-14 | 2013-08-14 | Welding method for gas shielded welding of aluminium-alloy vehicle body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103447664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108372A (en) * | 2015-09-30 | 2015-12-02 | 四川大西洋焊接材料股份有限公司 | Aluminum alloy welding wire special for welding of aluminum alloy train body of high-speed train and preparing method of aluminum alloy welding wire |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1655694A1 (en) * | 1989-01-09 | 1991-06-15 | Ташкентский Политехнический Институт Им.А.Р.Бируни | Method of welding aluminium alloys |
| SU1655697A1 (en) * | 1989-06-05 | 1991-06-15 | Ташкентский Политехнический Институт Им.А.Р.Бируни | Method of arc welding of aluminium alloys |
| CN1623721A (en) * | 2003-12-04 | 2005-06-08 | 兰州理工大学 | Surface active agent for alternating TIG welding of aluminium and alumnium alloy and its coating process |
| CN101347859A (en) * | 2008-05-08 | 2009-01-21 | 兰州理工大学 | Active welding method and activating agent for aluminum and aluminum alloy |
| CN101497156A (en) * | 2008-01-29 | 2009-08-05 | 沈阳铸造研究所 | Argon arc-welding fluid for eliminating aluminum castings repairing welding gas hole defect |
| CN102672370A (en) * | 2012-06-01 | 2012-09-19 | 江苏科技大学 | Multi-component active soldering flux for aluminum and aluminum alloy tungsten argon arc welding and preparation method for multi-component active soldering flux |
-
2013
- 2013-08-14 CN CN2013103530128A patent/CN103447664A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1655694A1 (en) * | 1989-01-09 | 1991-06-15 | Ташкентский Политехнический Институт Им.А.Р.Бируни | Method of welding aluminium alloys |
| SU1655697A1 (en) * | 1989-06-05 | 1991-06-15 | Ташкентский Политехнический Институт Им.А.Р.Бируни | Method of arc welding of aluminium alloys |
| CN1623721A (en) * | 2003-12-04 | 2005-06-08 | 兰州理工大学 | Surface active agent for alternating TIG welding of aluminium and alumnium alloy and its coating process |
| CN101497156A (en) * | 2008-01-29 | 2009-08-05 | 沈阳铸造研究所 | Argon arc-welding fluid for eliminating aluminum castings repairing welding gas hole defect |
| CN101347859A (en) * | 2008-05-08 | 2009-01-21 | 兰州理工大学 | Active welding method and activating agent for aluminum and aluminum alloy |
| CN102672370A (en) * | 2012-06-01 | 2012-09-19 | 江苏科技大学 | Multi-component active soldering flux for aluminum and aluminum alloy tungsten argon arc welding and preparation method for multi-component active soldering flux |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108372A (en) * | 2015-09-30 | 2015-12-02 | 四川大西洋焊接材料股份有限公司 | Aluminum alloy welding wire special for welding of aluminum alloy train body of high-speed train and preparing method of aluminum alloy welding wire |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103451496A (en) | Aluminum-magnesium alloy welding wire for gas shield welding of aluminum-alloy car body and preparation method thereof | |
| JP5194586B2 (en) | Stainless steel flux-cored welding wire for galvanized steel sheet welding | |
| CN106475683B (en) | A kind of laser assembly solder method with Al-Si coating hot forming steel plate | |
| CN101284339B (en) | Welding wire and method for welding the aluminum and aluminum alloy and steel | |
| CN105033507B (en) | A kind of welding rod special for special repairing built-up welding for hot-work die | |
| CN105057926B (en) | A kind of flux-cored wire special that built-up welding is repaired for hot-work die | |
| CN105127205B (en) | Large-scale bushing roll for producing strip and preparation method thereof | |
| CN101219508A (en) | Seamless explosive core aluminium welding wire and manufacturing method thereof | |
| CN103691910B (en) | A kind of aluminum bag magnesium composite plate material preparation method | |
| CN103203560A (en) | Composite aluminum-base brazing wire for continuously brazing aluminum alloy and method for manufacturing composite aluminum-base brazing wire | |
| CN104191110B (en) | The welding wire of applying argon gas protection is exempted from the single face welding and double face shaping back side | |
| CN103706967B (en) | A kind of welding compound and welding method | |
| CN106312263A (en) | Welding method for aluminum alloy thick plate | |
| CN105081610A (en) | Metal powder cored wire specially used for hot-working die repair | |
| CN110576273A (en) | Metal material, process and product for welding LNG (liquefied natural gas) ultralow-temperature stainless steel | |
| EP1728583B1 (en) | Improving slag detachability | |
| CN105081611A (en) | Special fine-diameter flux-cored wire for hot-working die repairing surfacing | |
| CN106381488A (en) | Preparation method of foot roller coating layer for continuous casting crystallizer | |
| CN102248281B (en) | Thick plate joint welding method | |
| CN110576274A (en) | Metal material, process and product for welding high-temperature high-pressure stainless steel pipeline | |
| CN110814632A (en) | Surfacing process method for cast steel anchor lip line type repair | |
| JP6777249B1 (en) | Manufacturing method of steel plate, tailored blank, hot press molded product, steel pipe, hollow hardened molded product, and steel plate | |
| CN103447664A (en) | Welding method for gas shielded welding of aluminium-alloy vehicle body | |
| CN101892441A (en) | Ultrafine crystal grain semi-trailer axle tube material and processing method of axle tube | |
| JP5340014B2 (en) | Submerged arc welding method for low temperature steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |