CN116551241A - Crack-free aluminum alloy flux-cored wire and preparation method and application thereof - Google Patents
Crack-free aluminum alloy flux-cored wire and preparation method and application thereof Download PDFInfo
- Publication number
- CN116551241A CN116551241A CN202310521392.5A CN202310521392A CN116551241A CN 116551241 A CN116551241 A CN 116551241A CN 202310521392 A CN202310521392 A CN 202310521392A CN 116551241 A CN116551241 A CN 116551241A
- Authority
- CN
- China
- Prior art keywords
- parts
- aluminum alloy
- crack
- cored wire
- welding
- 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
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 95
- 239000000843 powder Substances 0.000 claims abstract description 47
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002131 composite material Substances 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 15
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims description 13
- 239000011777 magnesium Substances 0.000 claims description 13
- 239000010936 titanium Substances 0.000 claims description 13
- 239000011651 chromium Substances 0.000 claims description 11
- 239000011572 manganese Substances 0.000 claims description 11
- 239000002048 multi walled nanotube Substances 0.000 claims description 11
- 229910002076 stabilized zirconia Inorganic materials 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 9
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 5
- 239000000463 material Substances 0.000 abstract description 14
- 239000002245 particle Substances 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 12
- 239000011159 matrix material Substances 0.000 abstract description 4
- 230000006911 nucleation Effects 0.000 abstract description 3
- 238000010899 nucleation Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 239000002905 metal composite material Substances 0.000 abstract 1
- 238000004227 thermal cracking Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- 238000007711 solidification Methods 0.000 description 10
- 230000008023 solidification Effects 0.000 description 10
- 238000000498 ball milling Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 229910052727 yttrium Inorganic materials 0.000 description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000009837 dry grinding Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 235000020610 powder formula Nutrition 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- 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
- B23K35/286—Al as the principal constituent
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention belongs to the technical field related to welding materials, and discloses a crack-free aluminum alloy flux-cored wire, a preparation method and application thereof, wherein the flux-cored wire comprises a tube and medicinal powder filled in the tube, and the medicinal powder comprises the following components in parts by weight: 4 to 6.8 parts of Cu, 0.8 to 1.2 parts of Mg,0.1 to 0.6 part of Mn,0.05 to 0.4 part of Cr, 0.2 to 0.5 part of Ti,0.1 to 0.25 part of Zr, 2 to 4 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe, 1 to 2 parts of TiC and the balance of Al powder; wherein the composite material is a mixture of zirconia and carbon nano tubes. According to the invention, heterogeneous nucleation particles and a reinforcing phase are added into the alpha-Al aluminum matrix to form the aluminum matrix composite material, so that weld metal grains are thinned, and the weld metal composite material has high thermal cracking resistance, hardness and tensile strength.
Description
Technical Field
The invention belongs to the technical field related to welding materials, and particularly relates to a crack-free aluminum alloy flux-cored wire and a preparation method and application thereof.
Background
The 2-series high-strength aluminum alloy has the advantages of high specific strength, high specific rigidity, good stress corrosion resistance, high fracture toughness, good processing performance and the like, is widely applied to the fields of aerospace, weapon equipment, transportation and the like, particularly plays a very important role in the aerospace field, and is one of the most important structural materials in the field. Although the high-strength aluminum alloy has higher specific strength, the welding performance is poor, solidification cracks are easily generated in the fusion welding process, and the mechanical properties of the high-strength aluminum alloy are seriously damaged, so that the industrial application of the high-strength aluminum alloy is limited. As a solid phase welding technique, a friction stir welding technique has been successfully applied to welding such high-strength aluminum alloys, in which the base material does not melt during the welding process and thus coarse grain structure and solidification cracking defects do not occur, and at the same time, the joint strength generally reaches 75% or more of the base material strength. Friction stir welding, however, requires relatively large upset pressure and forward drive force, is relatively complex and cumbersome to install, and is difficult to install particularly for complex welds, thereby impeding its widespread use in such high strength aluminum alloys. Therefore, fusion welding remains the primary welding means for such high strength aluminum alloys, but how to achieve solidification cracking defect suppression presents serious challenges.
Changing the chemical composition of the weld by adding welding materials is a common method for solving the solidification crack defect of the high-strength aluminum alloy. The 2-series aluminum alloy welding wires applied at present mainly comprise ER2319 (Al-Cu) welding wires and ER4043 (Al-Si) welding wires, and the ER2319 welding wires have high joint strength but have hot cracking tendency and cannot meet the use requirements in the aerospace field. ER4043 welding wire is widely applied in the actual production process because of better casting performance and easier wire making process, a large amount of eutectic with low melting point is easy to form in the welding process, and solidification crack tendency is reduced by utilizing the healing effect of the ER4043 welding wire, but the obtained joint strength is not high, and the use requirement in the field with higher performance requirement is difficult to meet.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a crack-free aluminum alloy flux-cored wire, a preparation method and application thereof, which form an aluminum-based composite material by adding heterogeneous nucleation particles and reinforcing phases into an alpha-Al-based matrix, so that weld metal grains are refined, and the weld metal has high heat crack resistance, hardness and tensile strength.
In order to achieve the above object, according to one aspect of the present invention, there is provided a crack-free aluminum alloy flux-cored wire, the wire comprising a tube and a powder filled in the tube, the powder comprising the following components in parts by mass: 4 to 6.8 parts of Cu, 0.8 to 1.2 parts of Mg,0.1 to 0.6 part of Mn,0.05 to 0.4 part of Cr, 0.2 to 0.5 part of Ti,0.1 to 0.25 part of Zr, 2 to 4 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe, 1 to 2 parts of TiC and the balance of Al powder; wherein the composite material is a mixture of zirconia and carbon nano tubes.
Further, the mass ratio of the zirconia to the carbon nanotubes is (3-5): 2.
Further, the zirconia is yttrium-stabilized zirconia powder with a specific surface area of 5m 2 Per gram, density of 6g/cm 3 The purity is more than 99.9 percent, and the grain diameter is 30-50 mu m.
Further, the carbon nanotubes are multi-wall carbon nanotubes, the outer diameter is 30 nm-50 nm, the inner diameter is 5 nm-12 nm, the length is 10 μm-15 μm, and the specific surface area is 250m 2 Per g, density is 0.01g/cm 3 The purity is more than 99 percent, and the grain diameter is less than 25 mu m.
Further, the medicinal powder comprises the following components in parts by weight: 6.8 parts of Cu,1 part of Mg,0.4 part of Mn,0.2 part of Cr,0.4 part of Ti,0.2 part of Zr,3 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe,2 parts of nano TiC and the balance of Al powder.
Further, the 1060 pure aluminum strip with the wall thickness of 0.5 mm-0.8 mm and the width of 14 mm-16 mm is prepared.
Further, the filling rate of the welding wire is 45% -60%, and the filling rate is the ratio of the mass of the powder to the sum of the mass of the powder and the mass of the aluminum strip.
Further, the grain sizes of copper, magnesium, chromium, manganese, titanium and zirconium are 50-125 mu m, and the average grain size of nano titanium carbide is 40nm.
The invention also provides a preparation method of the crack-free aluminum alloy flux-cored wire, which is used for preparing the crack-free aluminum alloy flux-cored wire.
The invention also provides application of the crack-free aluminum alloy flux-cored wire in welding.
In general, compared with the prior art, the crack-free aluminum alloy flux-cored wire and the preparation method and application thereof mainly have the following beneficial effects:
1. according to the welding wire provided by the invention, through flexible addition of the powder and in-situ alloying, the addition of yttrium stabilized zirconia and nano titanium carbide can be used as a nucleation core to promote alpha-Al to generate fine equiaxed grains, and the fine equiaxed grains are easier to coordinate deformation among the grains so as to inhibit solidification cracks, and meanwhile, the fine equiaxed grain structure has higher strength; in addition, the carbon nano tube is favorable for reducing the pores in the 2XXX aluminum alloy weld joint by one order of magnitude, promoting the precipitation phase to be increased, increasing the dislocation density and providing a foundation for dislocation reinforcement, meanwhile, the carbon nano tube can be tightly combined with the surrounding aluminum matrix, the load transmission process is improved, and the joint strength corresponding to the carbon nano tube can be further improved by adding and dispersing the multiwall carbon nano tube.
2. The invention solves the problems that the 2-series high-strength aluminum alloy is easy to generate hot cracks, the joint is softened and the joint strength is low, and the welding wire is adopted to weld the 2-series aluminum alloy, so that the heat stability and the welding strength of the welding seam are obviously improved, and the strength of part of the welding seam can be close to the joint strength obtained by solid-phase friction stir welding.
3. The welding wire can be made into a diameter of 1.2mm for gas shielded welding or laser arc composite welding, and can also be made into a diameter of 3.6mm, so that the welding wire is suitable for high-current welding, and the production efficiency is further improved.
4. The welding wire can be of any length, can be wound into a disc, is suitable for continuous automatic welding, and can be used for various welding methods such as laser filler wire welding, laser arc composite welding and the like besides gas shielded welding.
5. The welding wire provides a new thought for welding other difficult-to-weld material systems, such as nickel-based superalloy and dissimilar metal, is hopeful to improve welding among different materials, and can be used for additive manufacturing to prepare large-scale complex components.
Drawings
FIG. 1 is a diagram of a deposited metal scanning electron microscope provided in embodiment 1 of the present invention;
FIG. 2 is a diagram of a deposited metal scanning electron microscope structure provided in comparative example 1 of the present invention;
fig. 3 is a scanning electron microscope (sem) tissue diagram of deposited metal provided in comparative example 2 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention provides a crack-free aluminum alloy flux-cored wire which comprises a tube and medicinal powder filled in the tube, wherein the medicinal powder comprises the following components in parts by mass: 4 to 6.8 parts of Cu, 0.8 to 1.2 parts of Mg,0.1 to 0.6 part of Mn,0.05 to 0.4 part of Cr, 0.2 to 0.5 part of Ti,0.1 to 0.25 part of Zr, 2 to 4 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe, 1 to 2 parts of TiC and the balance of Al powder; wherein the composite material is a mixture of zirconia and carbon nano tubes.
In this embodiment, the mass ratio of the zirconia to the carbon nanotubes is (3 to 5): 2, and the zirconia is prepared by a ball milling method. The zirconia is yttrium-stabilized zirconia powder with a specific surface area of 5m 2 Per gram, density of 6g/cm 3 The purity is more than 99.9 percent, and the grain diameter is 30-50 mu m.
The carbon nano tube is a multi-wall carbon nano tube, the outer diameter is 30 nm-50 nm, the inner diameter is 5 nm-12 nm, the length is 10 mu m-15 mu m, and the specific surface area is 250m 2 Per g, density is 0.01g/cm 3 The purity is more than 99 percent, and the grain diameter is less than 25 mu m.
The ball milling conditions of the composite material are as follows: adopting a dry grinding process, wherein the grinding balls are zirconium dioxide (which is homogeneous with the material to be ground and avoids mixing impurities), the ball-material ratio is 6:1-8:1, the ball milling time is 2-3 hours, and the rotating speed is 800-1000 rpm; the ball-material ratio, the ball-milling time and the rotating speed are controlled, so that the multi-wall carbon nano tube after ball milling is firmly adhered to the surface of the yttrium stable zirconia ceramic particles, and the particle size of the material after ball milling is 5-8 mu m.
In one embodiment, the powder comprises the following components in parts by weight: 6.8 parts of Cu,1 part of Mg,0.4 part of Mn,0.2 part of Cr,0.4 part of Ti,0.2 part of Zr,3 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe,2 parts of nano TiC and the balance of Al powder.
The 1060 pure aluminum strip with the wall thickness of 0.5 mm-0.8 mm and the width of 14 mm-16 mm is prepared. The filling rate of the welding wire is 45% -60% (the filling rate is the ratio of the mass of the powder to the sum of the mass of the powder and the mass of the aluminum strip).
The Cu content of the copper powder is not less than 99.9 percent by mass, the Mg content of the magnesium powder is not less than 99.9 percent by mass, the Cr content of the chromium powder is not less than 99.5 percent by mass, the Mn content of the manganese powder is not less than 99.8 percent by mass, the Ti content of the titanium powder is not less than 99.6 percent by mass, the Zr content of the zirconium powder is not less than 99.9 percent by mass, the yttrium-stabilized zirconia component is not less than 99.9 percent by mass, and the ZrO content of the yttrium-stabilized zirconia component is not less than 99.9 percent by mass 2 The content is not less than 99.9%; the purity of the components of the multi-wall carbon nano tube is not less than 99 percent in percentage by mass; the TiC content of the nano titanium carbide is not less than 99.9% in mass percent.
In the alloy powder of the present embodiment, the copper powder, magnesium powder, chromium metal powder, manganese powder, titanium powder, and zirconium powder are preferably each 50 μm to 125 μm in particle size, yttrium-stabilized zirconia is 30 μm to 50 μm in particle size, multiwall carbon nanotubes are preferably smaller than 25 μm in particle size, and nano titanium carbide is preferably 40nm in average particle size.
The invention also provides a preparation method of the crack-free aluminum alloy flux-cored wire, which comprises the following steps:
s1, weighing yttrium-stabilized zirconia and multi-wall carbon nanotubes according to a medicinal powder formula, and performing dry ball milling to obtain a composite material; weighing the components according to the proportion of the powder formula, adding the composite material, and mixing to obtain the powder. Wherein, the powder is mixed for 30 minutes to 60 minutes by adopting a powder mixer to obtain the medicinal powder.
The medicinal powder comprises the following components in parts by mass: 4 to 6.8 parts of Cu, 0.8 to 1.2 parts of Mg,0.1 to 0.6 part of Mn,0.05 to 0.4 part of Cr, 0.2 to 0.5 part of Ti,0.1 to 0.25 part of Zr, 2 to 4 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe, 1 to 2 parts of TiC and the balance of Al powder; wherein the composite material is a mixture of zirconia and carbon nano tubes, the mass ratio of the zirconia to the carbon nano tubes is 3-5:2, the particle size of yttrium stabilized zirconia is 30-50 mu m, the particle size of multi-wall carbon nano tubes is less than 25 mu m, the average particle size of nano titanium carbide is 40nm, and the particle sizes of other powders are 50-125 mu m.
S2, cleaning the 1060 pure aluminum strip with the width of 14-16 mm and the thickness of 0.5-0.8 mm by using a scraper, cleaning by using ultrasonic cleaning equipment, rolling the aluminum strip into a U shape by using the existing flux-cored wire production equipment, and adding the powder prepared in the step S1 into the U-shaped groove, wherein the filling rate (the ratio of the mass of the powder to the mass of the flux-cored wire) is 45% -60%.
S3, closing the U-shaped groove to wrap the powder therein, wherein the closing part adopts a lap joint connection mode (the width of the lap joint part is 1 mm-2 mm, and the lap joint part is ensured by a forming roller of the existing flux-cored wire production equipment); and drawing and reducing the diameter through a wire drawing die for 15-25 times, annealing at 250-400 ℃ for 30 minutes in each time, and finally enabling the diameter to reach 0.8-2.4 mm.
S4, winding the obtained flux-cored wire layer into a disc, and obtaining the novel crack-free high-strength aluminum alloy flux-cored wire.
When the welding wire is used for welding, a laser swing-arc composite welding process is recommended, and the specific welding process is as follows: the laser power is 5000-10000W, the welding speed is 20-40 mm/s, the amplitude is 1.5-2.5 mm, the swinging frequency is 150-250 Hz, the defocusing amount is 0mm, the distance between optical wires is 4-6 mm, the dry extension of welding wires is 14-22 mm, and the welding current is 175-300A; the voltage is 24V-38V; the gas flow is 15L/min-25L/min, and the dry extension of the welding wire is 16mm. The welding wire has good technological performance, stable electric arc, less splashing and good crack resistance.
The invention is further illustrated by the following examples in which the composite material is prepared by: the yttrium stabilized zirconia and the multiwall carbon nanotube are used as raw materials, a dry grinding process is adopted, grinding balls are zirconium dioxide, the ball-material ratio is 8:1-10:1, the ball milling time is 2-3 hours, the rotating speed is 800-1000 rpm, and the particle size of the ball-milled material is 5-8 mu m.
Example 1
The invention provides a crack-free aluminum alloy flux-cored wire provided in embodiment 1, which mainly comprises the following steps:
s1: the medicine powder comprises the following components in parts by weight: 6.8 parts of Cu,1.0 part of Mg,0.4 part of Mn,0.2 part of Cr,0.4 part of Ti,0.2 part of Zr,3 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe,2 parts of nano TiC and the balance of Al powder; by 3mol Y 2 O 3 The grain size of the stabilized zirconia is 30-50 mu m, the grain size of the multi-wall carbon nano-tube is less than 25 mu m, the average grain size of the nano titanium carbide powder is 40nm, and the grain sizes of other powders are 50-125 mu m.
S2: cleaning 1060 pure aluminum strips with the width of 15mm and the thickness of 0.5mm by using a scraper, cleaning the upper surface oxide film by using ultrasonic cleaning equipment, rolling the aluminum strips into U shapes by using existing flux-cored wire production equipment, and adding the powder prepared in the step S1 into the U-shaped grooves, wherein the filling rate (the ratio of the mass of the powder to the mass of the flux-cored wire) is 60%.
S3: the U-shaped groove is sealed, so that the powder is wrapped in the U-shaped groove, and the sealed part adopts a lap joint connection mode (the width of the lap joint part is 1.5mm and is ensured by a forming roller of the existing flux-cored wire production equipment); and drawing and reducing the diameter through a wire drawing die for 20 passes, annealing at 250-400 ℃ for 30 minutes in each pass, and finally enabling the diameter to reach 1.2mm.
S4: and (3) winding the flux-cored wire layer obtained in the step (S3) into a disc to obtain a novel crack-free high-strength aluminum alloy flux-cored wire finished product.
The novel crack-free high-strength aluminum alloy flux-cored wire adopts a laser swing-electric arc composite welding process, and the welding parent metal is 2024-T4-state aluminum alloy with the thickness of 8 mm. The specific welding process comprises the following steps: the laser power is 5000W, the welding speed is 20mm/s, the amplitude is 2.5mm, the swing frequency is 250Hz, the spot diameter is 0.1mm, the defocusing amount is 0mm, the distance between the optical wires is 4mm, the dry extension of the welding wire is 16mm, and the welding current is 175A; the voltage is 24V; the gas flow is 20L/min, and the dry extension of the welding wire is 16mm. The welding wire has good technological performance, stable electric arc, less splashing and no solidification crack after welding, as shown in figure 1. The micro-hardness of the welding line is 155HV, the tensile strength of the joint is 364MPa, the strength coefficient of the joint is 81 percent, and the joint strength is equivalent to that obtained by friction stir welding.
Comparative example 1
The method adopts a commercial ER2319 aluminum copper welding wire as a filling metal, wherein the welding wire comprises the following components in percentage by mass: 5.8 to 6.8 parts of Cu,0.2 to 0.6 part of Mn,0.2 part of Si,0.3 part of Fe,0.02 part of Mg,0.1 part of Zn,0.05 to 0.15 part of V,0.1 to 0.2 part of Ti and 0.1 to 0.25 part of Zr; the diameter of the welding wire is 1.2mm.
And a laser swing-arc composite welding process is adopted, and a welding parent metal is 2024-T4 aluminum alloy with the thickness of 8 mm. The specific welding process comprises the following steps: the laser power is 5000W, the welding speed is 20mm/s, the amplitude is 2.5mm, the swing frequency is 250Hz, the defocusing amount is 0mm, the distance between optical wires is 4mm, the dry extension of welding wires is 16mm, and the welding current is 175A; the voltage is 24V; the gas flow is 20L/min, and the dry extension of the welding wire is 16mm. The welding wire has good technological performance, stable electric arc and less splashing, and solidification cracks appear after welding, as shown in figure 2. The microhardness of the welding seam is 135HV, the tensile strength of the joint is 320MPa, and the strength coefficient of the joint is 71%.
Compared with the comparative example, the novel crack-free high-strength aluminum alloy flux-cored wire can inhibit 2024 high-strength aluminum alloy welding solidification cracks, and meanwhile, the joint strength is improved by 14% compared with that obtained by ER 2319.
Comparative example 2
The method adopts a commercially available ER4043 aluminum-silicon welding wire as a filler metal, wherein the welding wire comprises the following components in parts by mass: 4.5 to 6.0 parts of Si,0.8 parts of Fe,0.3 parts of Cu,0.05 parts of Mn,0.05 parts of Mg,0.1 parts of Zn and 0.2 parts of Ti. The diameter of the welding wire is 1.2mm.
And a laser swing-arc composite welding process is adopted, and a welding parent metal is 2024-T4 aluminum alloy with the thickness of 8 mm. The specific welding process comprises the following steps: the laser power is 5000W, the welding speed is 20mm/s, the amplitude is 2.5mm, the swing frequency is 250Hz, the defocusing amount is 0mm, the distance between optical wires is 4mm, the dry extension of welding wires is 16mm, and the welding current is 175A; the voltage is 24V; the gas flow is 20L/min, and the dry extension of the welding wire is 16mm. The welding wire has good technological performance, stable electric arc and less splashing, and solidification cracks do not appear after welding, as shown in figure 3. The microhardness of the welding seam is 120HV, the tensile strength of the joint is 299MPa, and the strength coefficient of the joint is 66%.
Compared with the comparative example, the joint strength obtained by the novel crack-free high-strength aluminum alloy flux-cored wire is improved by 22% compared with the joint strength obtained by ER 4043.
The invention also provides an application of the welding wire in welding, and particularly can be applied to welding of aerospace devices.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a no crack aluminum alloy flux cored wire which characterized in that:
the welding wire comprises a tube and medicinal powder filled in the tube, wherein the medicinal powder comprises the following components in parts by weight: 4 to 6.8 parts of Cu, 0.8 to 1.2 parts of Mg,0.1 to 0.6 part of Mn,0.05 to 0.4 part of Cr, 0.2 to 0.5 part of Ti,0.1 to 0.25 part of Zr, 2 to 4 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe, 1 to 2 parts of TiC and the balance of Al powder; wherein the composite material is a mixture of zirconia and carbon nano tubes.
2. The crack-free aluminum alloy flux-cored wire of claim 1 wherein: the mass ratio of the zirconia to the carbon nano tube is (3-5): 2.
3. The crack-free aluminum alloy flux-cored wire of claim 2, wherein: the zirconia is yttrium-stabilized zirconia powder with a specific surface area of 5m 2 Per gram, density of 6g/cm 3 The purity is more than 99.9 percent, and the grain diameter is 30-50 mu m.
4. The crack-free aluminum alloy flux-cored wire of claim 2, wherein: the carbon nano tube is a multi-wall carbon nano tube, the outer diameter is 30 nm-50 nm, the inner diameter is 5 nm-12 nm, the length is 10 mu m-15 mu m, and the specific surface area is 250m 2 Per g, density is 0.01g/cm 3 The purity is more than 99 percent, and the grain diameter is less than 25 mu m.
5. The crack-free aluminum alloy flux-cored wire of claim 1 wherein: the medicinal powder comprises the following components in parts by weight: 6.8 parts of Cu,1 part of Mg,0.4 part of Mn,0.2 part of Cr,0.4 part of Ti,0.2 part of Zr,3 parts of composite material, more than 0 part and less than 0.1 part of Si, more than 0 part and less than 0.1 part of Fe,2 parts of nano TiC and the balance of Al powder.
6. The crack free aluminum alloy flux cored wire of any one of claims 1-5, wherein: the 1060 pure aluminum strip with the wall thickness of 0.5 mm-0.8 mm and the width of 14 mm-16 mm is prepared.
7. The crack free aluminum alloy flux cored wire of any one of claims 1-5, wherein: the filling rate of the welding wire is 45% -60%, and the filling rate is the ratio of the mass of the powder to the sum of the mass of the powder and the mass of the aluminum strip.
8. The crack free aluminum alloy flux cored wire of any one of claims 1-5, wherein: the grain sizes of copper, magnesium, chromium, manganese, titanium and zirconium are 50-125 mu m, and the average grain size of nano titanium carbide is 40nm.
9. A preparation method of a crack-free aluminum alloy flux-cored wire is characterized by comprising the following steps: the preparation method is used for preparing the crack-free aluminum alloy flux-cored wire in any one of claims 1-8.
10. Use of a crack free aluminum alloy flux cored wire of any one of claims 1-8 in welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310521392.5A CN116551241A (en) | 2023-05-10 | 2023-05-10 | Crack-free aluminum alloy flux-cored wire and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310521392.5A CN116551241A (en) | 2023-05-10 | 2023-05-10 | Crack-free aluminum alloy flux-cored wire and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116551241A true CN116551241A (en) | 2023-08-08 |
Family
ID=87496011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310521392.5A Pending CN116551241A (en) | 2023-05-10 | 2023-05-10 | Crack-free aluminum alloy flux-cored wire and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116551241A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117680867A (en) * | 2024-02-04 | 2024-03-12 | 南京航空航天大学 | High-strength welding wire based on nanoparticle implantation and microelement compensation, and preparation method and welding method thereof |
-
2023
- 2023-05-10 CN CN202310521392.5A patent/CN116551241A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117680867A (en) * | 2024-02-04 | 2024-03-12 | 南京航空航天大学 | High-strength welding wire based on nanoparticle implantation and microelement compensation, and preparation method and welding method thereof |
| CN117680867B (en) * | 2024-02-04 | 2024-05-24 | 南京航空航天大学 | Welding method of high-strength welding wire based on nanoparticle implantation and microelement compensation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2023005188A1 (en) | Aluminum alloy flux-cored wire and preparation method therefor | |
| CN107999991B (en) | High-entropy flux-cored wire for titanium-steel MIG welding and preparation method thereof | |
| CN108161277B (en) | High-entropy flux-cored wire for aluminum-steel submerged arc welding and preparation method thereof | |
| RU2378095C2 (en) | Filler wire for welding of aluminium alloys | |
| CN110129640A (en) | A kind of increasing material manufacturing 7000 line aluminium alloy wire rods and preparation method thereof | |
| CN116551241A (en) | Crack-free aluminum alloy flux-cored wire and preparation method and application thereof | |
| CN104476010A (en) | High-entropy alloy welding wire for welding titanium/stainless steel in TIG (Tungsten Inert Gas) mode and application | |
| CN111015012A (en) | Micro-nano particle reinforced aluminum alloy flux-cored filling wire for 7075 aluminum alloy TIG welding | |
| CN114654128B (en) | TC4 titanium alloy metal powder core flux-cored welding strip and preparation method thereof | |
| CN112775584A (en) | Silicon-rich in-situ reinforced cored wire for 7075 aluminum alloy electric arc additive and preparation method thereof | |
| CN109955003A (en) | High-strength, anti-corrosion Al-Mg-Zr aluminium alloy welding wire and preparation method thereof | |
| CN117626079A (en) | High-rigidity high-plasticity magnesium alloy and forming method of large complex component thereof | |
| CN111203671A (en) | Aluminum-based welding wire for aluminum/steel wire filling friction stir welding and preparation method thereof | |
| CN112935621B (en) | Welding wire for graphene-enhanced TA1-Q345 middle layer and preparation method | |
| CN100396416C (en) | Non-continuous reinforced aluminium-based composite material tungsten electrode argon-arc welding seam original position reinforcement method | |
| CN114083172A (en) | 7075 aluminum alloy powder core wire rod reinforced by aluminum alloy powder surface oxide film in-situ particles and manufacturing method | |
| CN112025136B (en) | Aluminum alloy welding wire suitable for arc fuse additive manufacturing and preparation method thereof | |
| CN115446499B (en) | Flux-cored powder, flux-cored aluminum welding wire with flux-cored powder and preparation method of flux-cored aluminum welding wire | |
| CN116079275A (en) | In-situ nanoparticle reinforced welding wire for aluminum vehicle body welding and welding method thereof | |
| CN115008065B (en) | Flux-cored wire for high entropy of titanium-steel weld joint and preparation method thereof | |
| CN114589430B (en) | Al-Mg alloy welding wire and preparation method thereof | |
| CN112453758B (en) | Welding wire for graphene-enhanced TA1-Q345 middle layer and preparation method | |
| Wang et al. | Laser-MIG arc hybrid brazing-fusion welding of Al alloy to galvanized steel with different filler metals | |
| US12042885B1 (en) | Aluminum alloy flux-cored welding wire and fabrication method thereof | |
| CN110614367A (en) | Interface coating enhanced biological magnesium-based metal ceramic and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |