CN106736009A - For the flux-cored wire of copper aluminium welding - Google Patents
For the flux-cored wire of copper aluminium welding Download PDFInfo
- Publication number
- CN106736009A CN106736009A CN201611084350.6A CN201611084350A CN106736009A CN 106736009 A CN106736009 A CN 106736009A CN 201611084350 A CN201611084350 A CN 201611084350A CN 106736009 A CN106736009 A CN 106736009A
- Authority
- CN
- China
- Prior art keywords
- flux
- cored wire
- welding
- copper aluminium
- graphite
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- 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.)
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/282—Zn as the principal constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention proposes a kind of flux-cored wire for copper aluminium welding, and chemical composition and percentage by weight are in flux-cored wire material：Silver 1.8~3.2%, magnadure 5~16%, bismuth oxide 0.6~1.4%, titanium oxide 2~4%, graphite 1~3%, cerium neodymium alloy 0.6~1.8%, balance of zinc.The flux-cored wire has the characteristics of wetability and penetrating power are good, and air-tightness is good after welding, tension intensity is high.
Description
Technical field
The invention belongs to technical field of welding materials, and in particular to a kind of flux-cored wire for copper aluminium welding.
Background technology
In recent years, the household electrical appliance demand with air-conditioning, refrigerator etc. as representative is gradually increasing, valve pipe fitting and compressor pipe
The brazing material demand on road is also increasing.BAg25CuZnSn silver solders be widely used in the industries such as air-conditioning, refrigeration copper with
The welding of copper alloy, copper and Bundy tube, property indices reach higher level.But the silver solder need to use noble metal silver 25%
Left and right, with the more and more higher of the prices of raw materials, compels to be used in refrigeration, machinery, electromechanics, electrical equipment, instrument and meter, valve pipe fitting etc.
The manufacturer of industry soldering has to seek that performance is constant, the lower brazing material of price.
Copper is easily achieved with the welding of copper, and the oxide-film of copper is relatively easy to remove.The welding of copper aluminum composite pipes usually can
The welding of copper aluminium is run into, the Welding Problems of many are often met in the welding in this field in recent years.Primary problem is the change of aluminium
Property is learned, metal surface has one layer of Al of fine and close infusibility under aluminium normal temperature2O3Oxide layer, can not such as be removed in time during welding
This oxide layer, postwelding will produce stomata, elephant skin, fracture, the low defect of tension intensity.Nowadays commercially available KF-AlF3Brazing flux and
CsF-AlF3Brazing flux has been able to the ability for solving removing oxide layer and reaching welding.
Either air-conditioning, refrigeration industry or heat exchanger, very high to the requirement after welding.Joint institute after welding
The environment for facing also rather harsh, high temperature, low temperature, high pressure and ageing-resistant ability are undoubtedly the major test of butt joint.But,
Pure Zn-Al flux-cored wires coordinate this brazing flux can not meet welding after requirement, mainly the tension intensity of postwelding,
Air-tightness and ageing resistace, solder melt point are relatively low, and wetability and penetrating power are all relatively poor.In recent years, Germany, the U.S.,
South Korea develops some new Zn-Al flux-cored wires in succession, and enters Chinese market, but and is not affected by the universal of user
Welcome, reason for that on the one hand in addition to expensive, mainly technically still there are many deficiencies.Wherein, major defect
It is exactly：(1) solder fusing point is relatively low, general only 380-420 DEG C；(2) wetability and permeability are poor.
The content of the invention
The present invention proposes a kind of flux-cored wire for copper aluminium welding, and the flux-cored wire has wetability and penetrating power
Well, the characteristics of air-tightness is good after welding, tension intensity is high.
The technical proposal of the invention is realized in this way：
A kind of flux-cored wire for copper aluminium welding, chemical composition and percentage by weight are in flux-cored wire material：
Silver 1.8~3.2%, magnadure 5~16%, bismuth oxide 0.6~1.4%, titanium oxide 2~4%, graphite 1~
3%th, cerium neodymium alloy 0.6~1.8%, balance of zinc.
Further, chemical composition and percentage by weight are in flux-cored wire material：
Silver 2~3.2%, magnadure 6~14%, bismuth oxide 0.8~1.4%, titanium oxide 2~4%, graphite 1~3%,
Cerium neodymium alloy 0.8~1.8%, balance of zinc.
Further, chemical composition and percentage by weight are in flux-cored wire material：
Silver 2.6%, magnadure 10%, bismuth oxide 1%, titanium oxide 3%, the cerium neodymium alloy 1.3% of graphite 2%, it is balance of
Zinc.
Further, chemical composition and percentage by weight are in flux-cored wire material：
Silver 1.8%, magnadure 15%, bismuth oxide 1.4%, titanium oxide 4%, graphite 1%, cerium neodymium alloy 1.8%, surplus
It is zinc.
Further, chemical composition and percentage by weight are in flux-cored wire material：
Silver 3.2%, magnadure 6%, bismuth oxide 0.6%, titanium oxide 2%, graphite 3%, cerium neodymium alloy 0.8%, surplus
It is zinc.
Flux-cored wire for copper aluminium welding of the invention adds magnadure, oxygen in existing Zn-Al alloy structure
Change bismuth, titanium oxide, graphite and cerium neodymium alloy, so that albronze air-tightness, tension intensity, wetability and oozes after welding
Saturating ability, decay resistance combination property obtains General Promotion.
Titanium oxide and al-mg powder primarily serve the effect of precedent desoxydation, to avoid the generation of the defects such as stomata.
Bismuth oxide can crystal grain thinning, improve low-temperature impact toughness, when being added with graphite simultaneously, tool increases significantly punching
Toughness effect is hit, and welding pool surface tension can be improved, improve the shaping of weld seam.
Graphite：Deoxidation, to providing C element in molten bath.
Rare-earth element cerium neodymium alloy plays a part of purification crystal boundary, crystal grain thinning, is beneficial to eliminate solidification cracking, improves weldering
Stitch the mechanical strength and toughness of metal.
Beneficial effects of the present invention：
The reasonable design that the present invention passes through welding wire chemical compositions so that welding wire has preferable wetability and osmotic energy
Power, melting temperature is 460~480 DEG C, and excellent pulls performance, and good fluidity, weld strength are high, postwelding air-tightness is good, postwelding
Free from corrosion feature, is widely used in air-conditioning, refrigerator, automobile and in refrigeration industry in the copper aluminium welding of heat exchanger or radiator.
Specific embodiment
Embodiment 1
Chemical composition and percentage by weight are in flux-cored wire material：
Silver 2.6%, magnadure 10%, bismuth oxide 1%, titanium oxide 3%, the cerium neodymium alloy 1.3% of graphite 2%, it is balance of
Zinc.
This alloy coordinates commercially available KF-AlF3Brazing flux and CsF-AlF3Brazing flux, is obtained by forming machine, wire drawing, wrapping wire program
Finished product flux-cored wire.
Embodiment 2
Chemical composition and percentage by weight are in flux-cored wire material：
Silver 1.8%, magnadure 15%, bismuth oxide 1.4%, titanium oxide 4%, graphite 1%, cerium neodymium alloy 1.8%, surplus
It is zinc.
This alloy coordinates commercially available KF-AlF3Brazing flux and CsF-AlF3Brazing flux, is obtained by forming machine, wire drawing, wrapping wire program
Finished product flux-cored wire.
Embodiment 3
Chemical composition and percentage by weight are in flux-cored wire material：
Silver 3.2%, magnadure 6%, bismuth oxide 0.6%, titanium oxide 2%, graphite 3%, cerium neodymium alloy 0.8%, surplus
It is zinc.
This alloy coordinates commercially available KF-AlF3Brazing flux and CsF-AlF3Brazing flux, is obtained by forming machine, wire drawing, wrapping wire program
Finished product flux-cored wire.
Embodiment 4
Chemical composition and percentage by weight are in flux-cored wire material：
Silver 2.4%, magnadure 16%, bismuth oxide 1.2%, graphite 2%, titanium oxide 4%, cerium neodymium alloy 0.6%, surplus
It is zinc.
This alloy coordinates commercially available KF-AlF3Brazing flux and CsF-AlF3Brazing flux, is obtained by forming machine, wire drawing, wrapping wire program
Finished product flux-cored wire.
Embodiment 5
Embodiment 1-4 is used for copper aluminium welding, the joint physical property to being welded is tested, and the tension of wherein weld seam is strong
Degree test is to take with weld seam as midpoint, the developmental tube after a length of 10mm welding, and being positioned over carries out joint tension on measurer for pulling force
Experiment, experiment condition is more than 120MPa；Weld joint air-tight test is taken as being respectively provided with 4 groups of air-conditioning heat exchanges of elbow pipe welding head
Machine is welded, and is filled with the nitrogen more than 40MPa after welding respectively, is put into water in carrying out air tightness test more than 30 seconds；
The test of weld seam burst pressure is taken with weld seam as midpoint, the developmental tube after a length of 10mm welding, is positioned over static pressure, explosion bulge test platform
On carry out joint blasting experiment, pressure is more than 185MPa；Flexibility test is, in the case of 180 ° of flexibility, detection tabs
Bending property.Experimental result is shown in Table 1.
The embodiment 1-4 of table 1 is used for the flux-cored wire the performance test results of copper aluminium welding
。
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (5)
1. a kind of flux-cored wire for copper aluminium welding, it is characterised in that chemical composition and weight percent in flux-cored wire material
Than for：
Silver 1.8~3.2%, magnadure 5~16%, bismuth oxide 0.6~1.4%, titanium oxide 2~4%, graphite 1~3%, cerium
Neodymium alloy 0.6~1.8%, balance of zinc.
2. the flux-cored wire for copper aluminium welding according to claim 1, it is characterised in that chemistry in flux-cored wire material
Composition and percentage by weight are：
Silver 2~3.2%, magnadure 6~14%, bismuth oxide 0.8~1.4%, titanium oxide 2~4%, graphite 1~3%, cerium neodymium
Alloy 0.8~1.8%, balance of zinc.
3. the flux-cored wire for copper aluminium welding according to claim 2, it is characterised in that chemistry in flux-cored wire material
Composition and percentage by weight are：
Silver 2.6%, magnadure 10%, bismuth oxide 1%, titanium oxide 3%, the cerium neodymium alloy 1.3% of graphite 2%, balance of zinc.
4. the flux-cored wire for copper aluminium welding according to claim 1, it is characterised in that chemistry in flux-cored wire material
Composition and percentage by weight are：
Silver 1.8%, magnadure 15%, bismuth oxide 1.4%, titanium oxide 4%, graphite 1%, cerium neodymium alloy 1.8%, it is balance of
Zinc.
5. the flux-cored wire for copper aluminium welding according to claim 1, it is characterised in that chemistry in flux-cored wire material
Composition and percentage by weight are：
Silver 3.2%, magnadure 6%, bismuth oxide 0.6%, titanium oxide 2%, graphite 3%, cerium neodymium alloy 0.8%, balance of zinc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611084350.6A CN106736009A (en) | 2016-11-30 | 2016-11-30 | For the flux-cored wire of copper aluminium welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611084350.6A CN106736009A (en) | 2016-11-30 | 2016-11-30 | For the flux-cored wire of copper aluminium welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106736009A true CN106736009A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611084350.6A Pending CN106736009A (en) | 2016-11-30 | 2016-11-30 | For the flux-cored wire of copper aluminium welding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317858A (en) * | 2017-07-31 | 2019-02-12 | 安徽华众焊业有限公司 | A kind of silver-based flux-cored wire |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745751A (en) * | 2009-12-23 | 2010-06-23 | 哈尔滨工业大学 | Welding wire for connection of aluminum/steel dissimilar alloy and processing process thereof |
| CN102441744A (en) * | 2011-06-28 | 2012-05-09 | 力创(台山)电子科技有限公司 | Flux-cored wire for copper-aluminum welding |
| WO2013017883A1 (en) * | 2011-08-02 | 2013-02-07 | Fry's Metals, Inc. | High impact toughness solder alloy |
| CN103042321A (en) * | 2012-12-21 | 2013-04-17 | 中国兵器工业第五二研究所 | Metal powder-cored type nitrogen austenite stainless steel flux-cored wire and method for manufacturing same |
| CN103302417A (en) * | 2013-06-03 | 2013-09-18 | 北京科技大学 | Zn-Al-Cu based brazing filler metal and preparation method thereof |
| CN103317253A (en) * | 2013-06-03 | 2013-09-25 | 北京科技大学 | Zn-Al-Cu based brazing filler metal for aluminum/copper brazing and preparation method thereof |
-
2016
- 2016-11-30 CN CN201611084350.6A patent/CN106736009A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745751A (en) * | 2009-12-23 | 2010-06-23 | 哈尔滨工业大学 | Welding wire for connection of aluminum/steel dissimilar alloy and processing process thereof |
| CN102441744A (en) * | 2011-06-28 | 2012-05-09 | 力创(台山)电子科技有限公司 | Flux-cored wire for copper-aluminum welding |
| WO2013017883A1 (en) * | 2011-08-02 | 2013-02-07 | Fry's Metals, Inc. | High impact toughness solder alloy |
| CN103042321A (en) * | 2012-12-21 | 2013-04-17 | 中国兵器工业第五二研究所 | Metal powder-cored type nitrogen austenite stainless steel flux-cored wire and method for manufacturing same |
| CN103302417A (en) * | 2013-06-03 | 2013-09-18 | 北京科技大学 | Zn-Al-Cu based brazing filler metal and preparation method thereof |
| CN103317253A (en) * | 2013-06-03 | 2013-09-25 | 北京科技大学 | Zn-Al-Cu based brazing filler metal for aluminum/copper brazing and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317858A (en) * | 2017-07-31 | 2019-02-12 | 安徽华众焊业有限公司 | A kind of silver-based flux-cored wire |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |