CN103447714A - Welding agent for gas shielded welding of aluminium-alloy vehicle body and preparation method of welding agent - Google Patents
Welding agent for gas shielded welding of aluminium-alloy vehicle body and preparation method of welding agent Download PDFInfo
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- CN103447714A CN103447714A CN2013103530306A CN201310353030A CN103447714A CN 103447714 A CN103447714 A CN 103447714A CN 2013103530306 A CN2013103530306 A CN 2013103530306A CN 201310353030 A CN201310353030 A CN 201310353030A CN 103447714 A CN103447714 A CN 103447714A
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- welding
- solder flux
- polyethylene glycol
- preparation
- nocolok
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Abstract
The invention discloses a welding agent for gas shielded welding of an aluminium-alloy vehicle body and a preparation method of the welding agent. The preparation method comprises the following steps of: weighing Nocolok (KAlF4+K3AlF6 cocrystallization) and CsF dry powder according to the matching ratio of 95% of Nocolok (KAlF4+K3AlF6 cocrystallization) and 5% of CsF, stirring uniformly with a powder stirrer, then weighing polyethylene glycol with the molecular weight of being 200 as a carrier according to 20-30% of the total weight of the welding agent, mixing the polyethylene glycol and the welding agent into paste with the proper viscosity meeting spraying or painting and packaging by a plastic tank. The welding agent for gas shielded welding of the aluminium-alloy vehicle body and the preparation method of the welding agent have the advantages that not only is the oxidation film removed, but also the base material and the metal in the molten pool are protected from secondary oxidation, so that the energy inputted in arc welding is greatly reduced, the warp distortion of the base material is reduced, the splashing and the dust generation amount of the metal are reduced, andsimultaneously the welding action of the metal is enhanced and the welding quality is improved.
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 solder flux of protecting weldering for aluminum alloy bodywork gas and preparation method thereof.
Background technology
Solder flux is when welding, can melt and form slag and gas, deposite metal is played to a kind of material of protection and Metallurgical processing effect, and the definition of solder flux is very extensive, comprises fused salt, organic matter, active gases, metallic vapour 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, originally be present in hydrone in oxide-film by the electric arc electrolysis after, 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.
The seam ability of scolder and mother metal and the person's character of scolder no doubt have much relations, but the effect of solder flux is also extremely important.The Welded performance is determined jointly by mother metal, scolder and solder flux.
Summary of the invention
The invention provides a kind of solder flux of protecting weldering for aluminum alloy bodywork gas and preparation method thereof, the invention provides that a kind of welding procedure is excellent, Weld Performance is stablized good solder flux, only need input low in calories just can realize soldered the connecing of high strength car body aluminum alloy MIG gas guarantor.
The technical scheme that realizes the object of the invention is:
A kind of solder flux of protecting weldering for aluminum alloy bodywork gas, the weight portion of described solder flux main chemical compositions: Nocolok(KAlF
4+ K
3alF
6eutectic) 95 parts+CsF5 part, 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, and wherein the state of Nocolok and CsF is 300～800 purpose mixture of powders.
A kind of preparation method of the solder flux for aluminum alloy bodywork gas guarantor weldering 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.
Advantage of the present invention is:
A kind of solder flux chemical composition for aluminum alloy bodywork gas guarantor weldering 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, mainly, with chemical mechanism 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.
The specific embodiment
Below by embodiment, the invention will be further elaborated, but therefore do not limit protection scope of the present invention.
Embodiment 1:
A kind of solder flux of protecting weldering for aluminum alloy bodywork gas, main chemical compositions percentage by weight: 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, and the weight of carrier polyethylene glycol is 20% of pasty state solder flux gross weight, and wherein the state of Nocolok and CsF is 300 purpose mixture of powders.
A kind of preparation method of the solder flux for aluminum alloy bodywork gas guarantor weldering comprises the following steps:
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 plastic tank, got product.
Embodiment 2: a kind of solder flux of protecting weldering for aluminum alloy bodywork gas, main chemical compositions percentage by weight: 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, and the weight of carrier polyethylene glycol is 30% of pasty state solder flux gross weight, and wherein the state of Nocolok and CsF is 400 purpose mixture of powders.
A kind of preparation method of the solder flux for aluminum alloy bodywork gas guarantor weldering comprises the following steps:
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 200-400 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, with hermetically sealed can, packed
Embodiment 3:
A kind of solder flux of protecting weldering for aluminum alloy bodywork gas, main chemical compositions percentage by weight: 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, and the weight of carrier polyethylene glycol is 25% of pasty state solder flux gross weight, and wherein the state of Nocolok and CsF is 800 purpose mixture of powders.
A kind of preparation method of the solder flux for aluminum alloy bodywork gas guarantor weldering comprises the following steps:
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 plastic tank, got product.
Claims (3)
1. a solder flux of protecting weldering for aluminum alloy bodywork gas, it is characterized in that: the weight portion of the chemical composition of described solder flux is: Nocolok95 part+CsF5 part, the polyethylene glycol that the molecular weight of usining after mixing is 200-400 is as carrier, reconcile into the solder flux of pasty state, the 20-30% of the solder flux gross weight that the weight of described carrier polyethylene glycol is pasty state.
2. solder flux according to claim 1, the state that it is characterized in that described Nocolok and CsF is 300～800 purpose mixture of powders.
3. a preparation method who protects the solder flux of weldering for aluminum alloy bodywork gas, it is characterized in that: specifically comprise the steps: the proportional quantity by Nocolok95 part+CsF5 part, take Nocolok and CsF dry powder, and stirred with powder mixer, then take polyethylene glycol that molecular weight is 200 as carrier by the 20-30% of solder flux gross weight, polyethylene glycol and solder flux are reconciled into to pasty state, packed with hermetically sealed can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103530306A CN103447714A (en) | 2013-08-14 | 2013-08-14 | Welding agent for gas shielded welding of aluminium-alloy vehicle body and preparation method of welding agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103530306A CN103447714A (en) | 2013-08-14 | 2013-08-14 | Welding agent for gas shielded welding of aluminium-alloy vehicle body and preparation method of welding agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103447714A true CN103447714A (en) | 2013-12-18 |
Family
ID=49730760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103530306A Pending CN103447714A (en) | 2013-08-14 | 2013-08-14 | Welding agent for gas shielded welding of aluminium-alloy vehicle body and preparation method of welding agent |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0347106A1 (en) * | 1988-06-14 | 1989-12-20 | Alcan International Limited | Treating aluminium workpieces |
| CN101434014A (en) * | 2008-12-26 | 2009-05-20 | 哈尔滨工业大学 | Flux suitable for arc welding-brazing of dissimilar metals between aluminium alloy and stainless steel |
| CN103203560A (en) * | 2013-04-18 | 2013-07-17 | 桂林市庆通有色金属工艺材料开发有限公司 | Composite aluminum-base brazing wire for continuously brazing aluminum alloy and method for manufacturing composite aluminum-base brazing wire |
-
2013
- 2013-08-14 CN CN2013103530306A patent/CN103447714A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0347106A1 (en) * | 1988-06-14 | 1989-12-20 | Alcan International Limited | Treating aluminium workpieces |
| CN101434014A (en) * | 2008-12-26 | 2009-05-20 | 哈尔滨工业大学 | Flux suitable for arc welding-brazing of dissimilar metals between aluminium alloy and stainless steel |
| CN103203560A (en) * | 2013-04-18 | 2013-07-17 | 桂林市庆通有色金属工艺材料开发有限公司 | Composite aluminum-base brazing wire for continuously brazing aluminum alloy and method for manufacturing composite aluminum-base brazing wire |
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Application publication date: 20131218 |