CN101391347A - Copper aluminum welding method - Google Patents
Copper aluminum welding method Download PDFInfo
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- CN101391347A CN101391347A CNA2008100595897A CN200810059589A CN101391347A CN 101391347 A CN101391347 A CN 101391347A CN A2008100595897 A CNA2008100595897 A CN A2008100595897A CN 200810059589 A CN200810059589 A CN 200810059589A CN 101391347 A CN101391347 A CN 101391347A
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Abstract
The invention relates to a welding method, in particular to a copper aluminum welding method. The invention mainly solves the problems in the prior art that the technology is complex, the cost is high, and a third metal is required as a connecting metal to realize the copper aluminum welding. And the invention provides a copper aluminum welding method of simple operation, low cost, fast and firm welding. The technique proposal of the invention is as follows: the steps of the copper aluminum welding method comprise: the contacted copper and aluminum is respectively heated by a heating device simultaneously at different temperature, with the temperature applied to the copper higher than that to the aluminum; when the heating time is over 0.5 seconds, the copper aluminum welding is finished.
Description
Technical field
The present invention relates to a kind of method of welding, especially relate to the method that a kind of copper and aluminium welding connects.
Background technology
Often can't directly weld between the copper aluminium, because the fusing point of copper, aluminium differs about 400 ℃, directly welding can destroy the crystalline phase of aluminium, causes fragility increase, the ductility of aluminium to reduce.General processing mode is to add the third weld metal or alloy between copper aluminium, and copper is crossed the third metal or alloy copper and aluminium welding is connected together.
As a kind of Chinese publication number is CN101074130 " method for welding aluminum-copper dissmilar metal ", the present invention relates to method for welding dissimilar metal, is specifically related to method for welding aluminum-copper dissmilar metal.This method is welded aluminum metal and copper metal respectively with the transition metal two ends, described transition metal adopts silver-colored magnesium nickel composite metal, and its composition percentage by weight is Ag 99.4%～99.5%, Ni 0.26%～0.30%, Mg0.24%～0.30%.Method of the present invention can thoroughly be stopped to diffuse to form the fragility phase mutually between the inner atom of weld seam, and the transition metal that adopts when preventing to weld is passed and the inefficacy that becomes fragile in time, and welding gained aluminum bronze dissimilar metal satisfies higher temperature, long-term instructions for use.
A kind of for another example Chinese publication number be CN1522820's " method of a kind of copper, aluminium, the compound soldering of stainless steel ", comprise the steps: between copper and aluminium, to be provided with a transition zone, described transition zone is a stainless steel substrates, its thickness is 0.1～0.5mm; The copper of required soldering, aluminium, stainless steel work-piece are cleaned, after the oil removing, brush potassium fluoroaluminate eutectic brazing fluxes, spill the al-si eutectic solder on aluminum component two surfaces, place stainless steel work-piece by on the weldering surface; Coat the potassium fluoborate brazing flux in the one side of transition zone stainless steel substrates, spill copper phosphorus base solder, the one side that is not coated with brazing flux, solder is placed on the aluminum component with the brazing flux solder, cover copper sheet again and be equipped with weldering; The present invention is provided with a stainless steel substrates as the transition brazing layer owing to having adopted between copper and aluminium, make copper, aluminium, the compound soldering of stainless steel on technology, form copper-stainless-steel, stainless steel-aluminium, three brazing filler metal faces of aluminium-stainless steel, thus overcome copper-aluminium directly touch brazing filler metal face that soldering brings produce copper, aluminium frangible compounds and cause poor welding quality drawback, guaranteed the quality of product.Such technology is too complicated, and has increased production cost.
Summary of the invention
The present invention solves the technical sophistication that prior art exists, and the cost height needs the third metal technical problem such as do that connection just can finish that copper and aluminium welding connects, and provides a kind of simple to operate, with low cost, and speed of welding is fast, the method that the copper and aluminium welding of firm welding connects.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: the method that copper and aluminium welding connects, its step comprises: simultaneously the copper of contact is applied different temperature respectively with aluminium with heater, the temperature that copper is applied is greater than the temperature that aluminium is applied, can finish copper and aluminium welding and connect greater than 0.5 second heat time heating time.Utilize temperature difference welding dissimilar metal, particularly soldering copper aluminium or soldering copper aluminium alloy, general solution is to adopt the third metal to do intermediate layer, and uses the welding of welding material.Its complex process has increased cost.Those skilled in the art think that adopting the difficulty of regulating the temperature difference welding to be higher than adopts transition to weld layer by layer, can not implement.Yet of the present invention facts have proved as long as method is suitable, adopted the transition zone welding though adopt the technical difficulty of adjusting the temperature difference welding to be higher than, in operation than adopt the transition zone welding simple, easy to implement, more save cost.
In the method that above-mentioned copper and aluminium welding connects, as preferably, the temperature that copper is applied is greater than 100～500 ℃ of the temperature that aluminium is applied.Utilize temperature difference welding dissimilar metal, particularly soldering copper aluminium or soldering copper aluminium alloy, not prompting in data in the past is because adopt the temperature difference welding to acquire a certain degree of difficulty for machining accuracy, process.
In the method that above-mentioned copper and aluminium welding connects, as preferably, the described temperature that copper is applied is 600～800 ℃, the fusing point of copper or copper alloy is about 700 ℃, if welding temperature is too high, can cause that crystal grain is thick, percentage elongation sharply descends, have a strong impact on the serviceability of material.
In the method that above-mentioned copper and aluminium welding connects, as preferably, the described temperature that aluminium is applied is 300～500 ℃, the fusing point of aluminum or aluminum alloy is about 400 ℃, if welding temperature is too high, can cause that crystal grain is thick, percentage elongation sharply descends, have a strong impact on the serviceability of material.
In the method that above-mentioned copper and aluminium welding connects, as preferably, be 1～10 second described heat time heating time.Warm-up time is long, and the face that causes heating melts distortion, lattice changes, and damages processing component.
In the method that above-mentioned copper and aluminium welding connects, as preferably, described copper is thickness less than 15 millimeters copper sheet, and described aluminium is thickness less than 15 millimeters aluminium flake.The metal alloy thermal conductivity is strong, and certain thickness can pass to heat, if but the too thick meeting of metal thickness is long because of warm-up time, and the face that causes heating melts distortion, lattice changes, and damages processing component.And above-mentioned copper sheet aluminium flake can also comprise the parts as different shapes such as copper pipe aluminum pipes that the copper sheet aluminium flake is made.
In the method that above-mentioned copper and aluminium welding connects, as preferably, described copper is fine copper or the copper content copper alloy greater than 80wt%.Copper alloy comprises: aluminium copper, gun-metal, monel, tungsten-copper alloy, pltine etc.
In the method that above-mentioned copper and aluminium welding connects, as preferably, described aluminium is fine aluminium or the aluminum content aluminium alloy greater than 80wt%.Aluminium alloy comprises: alumal, aluminium copper, aluminium-cooper-maganesium alloy, aluminium zinc-magnesium copper alloy etc.
The present invention has the following advantages:
Do not adopt the third metal to do transition zone, and directly copper aluminium is added thermal weld.
Parts for complicated shape can easily weld, and connect evenly, welding back percentage elongation height.
The specific embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment 1:
Choosing thickness and be the copper sheet that 1 millimeter aluminium flake and thickness is 1 millimeter welds, adopt electrically heated mode that welding clamp A temperature is adjusted to 400 ℃, adopt electrically heated mode that welding clamp B temperature is adjusted to 700 ℃, welding clamp A contacts with aluminium flake, welding clamp B contacts with copper sheet, promotes welding clamp A at once after the contact and welding clamp B is superimposed aluminium flake and copper sheet, and aluminium flake is with after copper sheet contacts 3 seconds, remove welding clamp A and welding clamp B, what copper sheet and aluminium flake were firm welds together.
Embodiment 2:
Choosing thickness and be the copper sheet that 3 millimeters aluminium flake and thickness is 5 millimeters welds, welding clamp A temperature is adjusted to 450 ℃, welding clamp B temperature is adjusted to 750 ℃, welding clamp A contacts with aluminium flake, welding clamp B contacts with copper sheet, promotes welding clamp A at once after the contact and welding clamp B is superimposed aluminium flake and copper sheet, and aluminium flake is with after copper sheet contacts 4 seconds, remove welding clamp A and welding clamp B, what copper sheet and aluminium flake were firm welds together.
Embodiment 3:
Choosing thickness and be the copper sheet that 7 millimeters aluminium flake and thickness is 8 millimeters welds, welding clamp A temperature is adjusted to 500 ℃, welding clamp B temperature is adjusted to 800 ℃, welding clamp A contacts with aluminium flake, welding clamp B contacts with copper sheet, promotes welding clamp A at once after the contact and welding clamp B is superimposed aluminium flake and copper sheet, and aluminium flake is with after copper sheet contacts 5 seconds, remove welding clamp A and welding clamp B, what copper sheet and aluminium flake were firm welds together.
Embodiment 4:
Choosing thickness and be the copper sheet that 15 millimeters aluminium flake and thickness is 15 millimeters welds, welding clamp A temperature is adjusted to 300 ℃, welding clamp B temperature is adjusted to 600 ℃, welding clamp A contacts with aluminium flake, welding clamp B contacts with copper sheet, promotes welding clamp A at once after the contact and welding clamp B is superimposed aluminium flake and copper sheet, and aluminium flake is with after copper sheet contacts 10 seconds, remove welding clamp A and welding clamp B, what copper sheet and aluminium flake were firm welds together.
Embodiment 5:
The aluminum content of choosing thickness and be 1 millimeter is that the alumal sheet of 80wt% and copper sheet that thickness is 2 millimeters weld, welding clamp A temperature is adjusted to 430 ℃, welding clamp B temperature is adjusted to 750 ℃, welding clamp A contacts with the alumal sheet, welding clamp B contacts with copper sheet, promotes welding clamp A at once after the contact and welding clamp B is superimposed alumal sheet and copper sheet, after the alumal sheet contacts 2 seconds with copper sheet, remove welding clamp A and welding clamp B, copper sheet and firm the welding together of alumal sheet.
Embodiment 6:
The monel sheet of choosing thickness and be copper content that 2 millimeters aluminium flake and thickness is 1 millimeter and be 80wt% welds, welding clamp A temperature is adjusted to 410 ℃, welding clamp B temperature is adjusted to 760 ℃, welding clamp A contacts with aluminium flake, welding clamp B contacts with the monel sheet, promoting welding clamp A and welding clamp B after the contact at once is superimposed aluminium flake and monel sheet, aluminium flake is with after the monel sheet contacts 3.5 seconds, remove welding clamp A and welding clamp B, what monel sheet and aluminium flake were firm welds together.
Embodiment 7:
The aluminum content of choosing thickness and be 1 millimeter is that the aluminium copper sheet of 80wt% and copper content that thickness is 1 millimeter are that the pltine sheet of 80wt% welds, welding clamp A temperature is adjusted to 350 ℃, welding clamp B temperature is adjusted to 650 ℃, welding clamp A contacts with the aluminium copper sheet, welding clamp B contacts with the pltine sheet, promoting welding clamp A and welding clamp B after the contact at once is superimposed aluminium copper sheet and pltine sheet, the aluminium copper sheet is with after the pltine sheet contacts 4 seconds, remove welding clamp A and welding clamp B, pltine sheet and firm the welding together of aluminium copper sheet.
Embodiment 8:
The aluminum content of choosing thickness and be 3 millimeters is that the aluminium copper sheet of 90wt% and copper content that thickness is 3 millimeters are that the pltine sheet of 90wt% welds, welding clamp A temperature is adjusted to 380 ℃, welding clamp B temperature is adjusted to 680 ℃, welding clamp A contacts with the aluminium copper sheet, welding clamp B contacts with the pltine sheet, promoting welding clamp A and welding clamp B after the contact at once is superimposed aluminium copper sheet and pltine sheet, the aluminium copper sheet is with after the pltine sheet contacts 5 seconds, remove welding clamp A and welding clamp B, pltine sheet and firm the welding together of aluminium copper sheet.
Embodiment 9:
Choose thickness and be 5 millimeters aluminum content for the 95wt% copper content be 3wt% aluminium-cooper-maganesium alloy sheet and the thickness copper content that the is 5 millimeters gun-metal sheet that is 90wt% weld, welding clamp A temperature is adjusted to 480 ℃, welding clamp B temperature is adjusted to 790 ℃, welding clamp A contacts with the aluminium-cooper-maganesium alloy sheet, welding clamp B contacts with the gun-metal sheet, promoting welding clamp A and welding clamp B after the contact at once is superimposed aluminium-cooper-maganesium alloy sheet and gun-metal sheet, the aluminium-cooper-maganesium alloy sheet is with after the gun-metal sheet contacts 5 seconds, remove welding clamp A and welding clamp B, gun-metal sheet and firm the welding together of aluminium-cooper-maganesium alloy sheet.
Embodiment 10:
The aluminum content of choosing thickness and be 5 millimeters is that the aluminium copper sheet of 95wt% and copper content that thickness is 5 millimeters are that the gun-metal sheet of 90wt% welds, welding clamp A temperature is adjusted to 480 ℃, welding clamp B temperature is adjusted to 790 ℃, welding clamp A contacts with the aluminium copper sheet, welding clamp B contacts with the gun-metal sheet, promoting welding clamp A and welding clamp B after the contact at once is superimposed aluminium copper sheet and gun-metal sheet, the aluminium copper sheet is with after the gun-metal sheet contacts 5 seconds, remove welding clamp A and welding clamp B, gun-metal sheet and firm the welding together of aluminium copper sheet.
Embodiment 11:
The aluminum content of choosing thickness and be 3 millimeters is that the aluminium zinc-magnesium alcu alloy film of 3wt% and copper content that thickness is 3 millimeters are that the tungsten-copper alloy sheet of 95wt% welds for the 90wt% copper content for the 5wt% zinc content, welding clamp A temperature is adjusted to 500 ℃, welding clamp B temperature is adjusted to 800 ℃, welding clamp A contacts with aluminium flake, welding clamp B contacts with copper sheet, promote welding clamp A at once after the contact and welding clamp B is superimposed aluminium flake and copper sheet, after aluminium flake contacts 6 seconds with copper sheet, remove welding clamp A and welding clamp B, what copper sheet and aluminium flake were firm welds together.
Embodiment 12:
The aluminum content of choosing thickness and be 15 millimeters is that the aluminium copper sheet of 80wt% and copper content that thickness is 15 millimeters are that the albronze sheet of 80wt% welds, welding clamp A temperature is adjusted to 400 ℃, welding clamp B temperature is adjusted to 700 ℃, welding clamp A contacts with the aluminium copper sheet, welding clamp B contacts with the albronze sheet, promoting welding clamp A and welding clamp B after the contact at once is superimposed aluminium copper sheet and albronze sheet, the aluminium copper sheet is with after the albronze sheet contacts 10 seconds, remove welding clamp A and welding clamp B, aluminium copper sheet and firm the welding together of albronze sheet.
Embodiment 13:
The aluminum content of choosing thickness and be 0.8 millimeter is that the aluminium copper sheet of 90wt% and copper content that thickness is 0.8 millimeter are that the albronze sheet of 90wt% welds, welding clamp A temperature is adjusted to 450 ℃, welding clamp B temperature is adjusted to 750 ℃, welding clamp A contacts with the aluminium copper sheet, welding clamp B contacts with the albronze sheet, promoting welding clamp A and welding clamp B after the contact at once is superimposed aluminium copper sheet and albronze sheet, the aluminium copper sheet is with after the albronze sheet contacts 0.5 second, remove welding clamp A and welding clamp B, aluminium copper sheet and firm the welding together of albronze sheet.
The comparative example 1～13:
With tensile strength, the percentage elongation between the back two kinds of metal/alloy of this area universal test standard testing embodiment 1～13 welding.
The parts that comparative example 1 employing embodiment 1 is welded are as tested object, and the parts that comparative example 2 employing embodiment 2 are welded are as tested object, by that analogy.The concrete data of test gained see Table 1.
Table 1 embodiment 1～13 performance test table
From comparative example 1～13 as can be seen, the parts that welding method of the present invention obtains, its percentage elongation 〉=25%, tensile strength 〉=120MPa.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technical staff of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (8)
1. method that copper and aluminium welding connects, its step comprises: simultaneously the copper of contact is applied different temperature respectively with aluminium with heater, the temperature that copper is applied is greater than the temperature that aluminium is applied, and can finish copper and aluminium welding and connect greater than 0.5 second heat time heating time.
2. the method that copper and aluminium welding according to claim 1 connects is characterized in that: the temperature that copper is applied is greater than 100～500 ℃ of the temperature that aluminium is applied.
3. the method that copper and aluminium welding according to claim 1 connects is characterized in that: the described temperature that copper is applied is 600～800 ℃.
4. the method that copper and aluminium welding according to claim 1 connects is characterized in that: the described temperature that aluminium is applied is 300～500 ℃.
5. the method that copper and aluminium welding according to claim 1 connects is characterized in that: be 1～10 second described heat time heating time.
6. the method that connects according to claim 1 or 2 or 3 or 4 or 5 described copper and aluminium weldings is characterized in that: described copper is thickness less than 15 millimeters copper sheet, and described aluminium is thickness less than 15 millimeters aluminium flake.
7. the method that connects according to claim 1 or 2 or 3 or 4 or 5 described copper and aluminium weldings is characterized in that: described copper is fine copper or the copper content copper alloy greater than 80wt%.
8. the method that connects according to claim 1 or 2 or 3 or 4 or 5 described copper and aluminium weldings is characterized in that: described aluminium is fine aluminium or the aluminum content aluminium alloy greater than 80wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100595897A CN101391347A (en) | 2008-02-04 | 2008-02-04 | Copper aluminum welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100595897A CN101391347A (en) | 2008-02-04 | 2008-02-04 | Copper aluminum welding method |
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| Publication Number | Publication Date |
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| CN101391347A true CN101391347A (en) | 2009-03-25 |
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| CNA2008100595897A Pending CN101391347A (en) | 2008-02-04 | 2008-02-04 | Copper aluminum welding method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103737188A (en) * | 2013-12-17 | 2014-04-23 | 孙建康 | Welding method for dissimilar metal |
| CN109175562A (en) * | 2018-09-13 | 2019-01-11 | 湖北汽车工业学院 | A kind of copper aluminum dissimilar metal TIG soldering processes |
| CN110958928A (en) * | 2017-07-25 | 2020-04-03 | 住友电气工业株式会社 | Method for manufacturing welded structure of metal member, and welded structure of metal member |
| CN114833492A (en) * | 2021-02-01 | 2022-08-02 | 中国石油天然气股份有限公司 | Welding material for copper-aluminum welding and copper-aluminum welding method |
-
2008
- 2008-02-04 CN CNA2008100595897A patent/CN101391347A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103737188A (en) * | 2013-12-17 | 2014-04-23 | 孙建康 | Welding method for dissimilar metal |
| CN103737188B (en) * | 2013-12-17 | 2016-03-02 | 佛山晓世科技服务有限公司 | The welding method of dissimilar metal |
| CN110958928A (en) * | 2017-07-25 | 2020-04-03 | 住友电气工业株式会社 | Method for manufacturing welded structure of metal member, and welded structure of metal member |
| CN110958928B (en) * | 2017-07-25 | 2022-03-29 | 住友电气工业株式会社 | Method for manufacturing welded structure of metal member, and welded structure of metal member |
| CN109175562A (en) * | 2018-09-13 | 2019-01-11 | 湖北汽车工业学院 | A kind of copper aluminum dissimilar metal TIG soldering processes |
| CN109175562B (en) * | 2018-09-13 | 2020-10-30 | 湖北汽车工业学院 | TIG brazing process for copper-aluminum dissimilar metal |
| CN114833492A (en) * | 2021-02-01 | 2022-08-02 | 中国石油天然气股份有限公司 | Welding material for copper-aluminum welding and copper-aluminum welding method |
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