CN115430945B - High-strength aluminum alloy universal welding wire and production method thereof - Google Patents
High-strength aluminum alloy universal welding wire and production method thereof Download PDFInfo
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- CN115430945B CN115430945B CN202211144550.1A CN202211144550A CN115430945B CN 115430945 B CN115430945 B CN 115430945B CN 202211144550 A CN202211144550 A CN 202211144550A CN 115430945 B CN115430945 B CN 115430945B
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- 238000003466 welding Methods 0.000 title claims abstract description 94
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910018569 Al—Zn—Mg—Cu Inorganic materials 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 238000000137 annealing Methods 0.000 claims abstract description 9
- 238000001192 hot extrusion Methods 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000009718 spray deposition Methods 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 5
- 238000007790 scraping Methods 0.000 claims abstract description 5
- 238000004513 sizing Methods 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims 1
- 239000010953 base metal Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- OMOVVBIIQSXZSZ-UHFFFAOYSA-N [6-(4-acetyloxy-5,9a-dimethyl-2,7-dioxo-4,5a,6,9-tetrahydro-3h-pyrano[3,4-b]oxepin-5-yl)-5-formyloxy-3-(furan-3-yl)-3a-methyl-7-methylidene-1a,2,3,4,5,6-hexahydroindeno[1,7a-b]oxiren-4-yl] 2-hydroxy-3-methylpentanoate Chemical compound CC12C(OC(=O)C(O)C(C)CC)C(OC=O)C(C3(C)C(CC(=O)OC4(C)COC(=O)CC43)OC(C)=O)C(=C)C32OC3CC1C=1C=COC=1 OMOVVBIIQSXZSZ-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
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- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
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- 230000004927 fusion Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000542 Sc alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 239000011261 inert gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- 239000010937 tungsten Substances 0.000 description 1
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
- B23K35/02—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
-
- 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
- B23K35/288—Al as the principal constituent with Sn or Zn
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a high-strength aluminum alloy universal welding wire and a production method thereof, comprising the following steps: (1) Mixing Al-Zn-Mg-Cu aluminum alloy with B, zr, then carrying out alloy melting, and then carrying out spray forming to obtain a blank; semi-solid upsetting is carried out on the blank to form an ingot blank, and hot extrusion is carried out on the ingot blank to obtain a bar material and the bar material is coiled; (2) And (3) annealing the coiled bar, then carrying out continuous multipass rolling drawing to the required welding wire diameter, and sequentially sizing, rounding, glomerocryst rolling, fine scraping, cleaning and drying to obtain the high-strength aluminum alloy universal welding wire. The welding wire is prepared by taking Al-Zn-Mg-Cu aluminum alloy as a matrix and adding 0.1-1% of B and 0.1-1% of Zr by weight of the matrix, has welding universality on 7XXX high-strength aluminum alloys with different brands, and has better mechanical properties and higher strength and plasticity of welded joints after welding.
Description
Technical Field
The invention relates to the technical field of high-strength aluminum alloy welding, in particular to a high-strength aluminum alloy universal welding wire and a production method thereof.
Background
The 7XXX series aluminum alloy, such as 7050, 7055, 7075, 7475, 7085 and the like, belongs to Al-Zn-Mg-Cu series super-hard aluminum alloy, has higher specific strength, and is widely applied to the fields of aerospace, rail transit and the like. Although the Al-Zn-Mg-Cu aluminum alloy has high strength, the plasticity is poor, the welding wire cannot be successfully processed by adopting the traditional drawing processing mode, and the welding joint is easy to generate hot cracks or stress corrosion cracks during fusion welding, so that the Al-Zn-Mg-Cu aluminum alloy is difficult to realize fusion welding, and has the problem of poor weldability. At present, the welding of Al-Zn-Mg-Cu series high-strength aluminum alloy generally lacks the supply of batch wires with excellent welding performance, and particularly lacks universal wires which can be suitable for the welding of most high-strength aluminum alloys.
Aiming at the technical difficulties, the prior art with the publication number of CN112831735A discloses a preparation method of a high-strength aluminum alloy wire/strip, which adopts spray forming to prepare blanks and then performs semi-solid extrusion and hot extrusion to obtain wires with different specifications of Al-Zn-Mg-Cu high-strength aluminum alloy, the wires prepared by the method can only be welded for a certain corresponding grade of aluminum alloy, the prepared wires do not have universality for most aluminum alloys, especially 7XXX series high-strength aluminum alloy, and are inconvenient to use, so that the application of the high-strength aluminum alloy, especially the ultrahigh-strength aluminum alloy, is limited.
At present, the current domestic research state also has a certain breakthrough, and the influence of Sc or Zr-Sc on the structure and performance of an Al-Mg-Sc alloy welding joint is researched, and the influence of Sc, zr and Er on the mechanical property of the welding joint is researched by using a traditional ER5356 welding wire and an ER5356 welding wire added with Sc, zr and Er to carry out tungsten electrode inert gas shielded welding on a 7A52 aluminum alloy. However, the problems of large-scale production of welding raw material wires are not well solved, the price is high, and the processing and the application of the Al-Zn-Mg-Cu high-strength aluminum alloy structural member are greatly limited by the problems.
Disclosure of Invention
The general welding wire for the high-strength aluminum alloy and the production method thereof are provided for solving the technical problems that the existing welding wire does not have universality for most Al-Zn-Mg-Cu high-strength aluminum alloys and is difficult to realize large-scale production. The welding wire obtained by the method has better welding performance on most Al-Zn-Mg-Cu series high-strength aluminum alloy components, and is easy for mass production.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a production method of a high-strength aluminum alloy universal welding wire comprises the following steps:
(1) Mixing Al-Zn-Mg-Cu aluminum alloy with B, zr, then carrying out alloy melting, and then carrying out spray forming to obtain a blank; semi-solid upsetting is carried out on the blank to form an ingot blank, and hot extrusion is carried out on the ingot blank to obtain a bar material and the bar material is coiled;
(2) And (3) annealing the coiled bar, then carrying out continuous multipass rolling drawing to the required welding wire diameter, and sequentially sizing, rounding, glomerocryst rolling, fine scraping, cleaning and drying to obtain the high-strength aluminum alloy universal welding wire. The annealing is carried out before the continuous rolling to the required size, the intermediate annealing link in the rolling process can be omitted, and the crack is less and the crack is not broken.
Further, the Al-Zn-Mg-Cu aluminum alloy comprises the following elements in percentage by weight: 5-8% of Zn, 1.5-5% of Mg, 1-3% of Cu and the balance of Al.
Still further, the Al-Zn-Mg-Cu aluminum alloy comprises the following elements in 100% by weight: 7-8% of Zn, 2-3% of Mg, 1.5-2.5% of Cu and the balance of Al.
Further, the addition amounts of B and Zr are respectively 0.1 to 1wt% of the weight of the Al-Zn-Mg-Cu series aluminum alloy.
Still further, the addition amounts of B and Zr are 0.1 to 0.5wt% of the weight of the Al-Zn-Mg-Cu series aluminum alloy, respectively. The total amount of microelements B and Zr exceeds 1wt%, which will result in a material with a high brittleness.
Further, the semi-solid upsetting in the step 1 is upsetting the blank at 460-575 ℃; the temperature of the annealing treatment in the step 2 is 200-300 ℃, and the temperature is kept for at least 10h.
Further, the temperature of the hot extrusion in the step 1 is 380-480 ℃, and the ingot blank with the diameter of 150-300mm is hot extruded into bars with the diameter of 5-10 mm.
Further, in the step 2, the rolling drawing is continuously performed in a horizontal roller die drawing machine for at least 5 times, the compression rate of a drawing surface of each time is 6-8%, and the drawing is performed to the requirement of 0.8-1.6mm in diameter.
The invention also provides a general welding wire for the high-strength aluminum alloy, which is obtained by the preparation method, and the welding wire takes the Al-Zn-Mg-Cu aluminum alloy as a matrix, is added with 0.1 to 1 percent of B and 0.1 to 1 percent of Zr by weight of the matrix, has welding universality for the Al-Zn-Mg-Cu aluminum alloy, and is particularly suitable for welding the Al-Zn-Mg-Cu super-hard aluminum alloy such as 7050, 7055, 7075, 7475, 7085 and the like.
The beneficial technical effects are as follows: according to the invention, trace B, zr is added into Al-Zn-Mg-Cu aluminum alloy, and after the alloy is melted, a matrix with refined crystal grains and uniform components is obtained by adopting spray forming, wherein the matrix contains trace B, zr of Al-Zn-Mg-Cu high-strength aluminum alloy blank capable of keeping fine crystal in the welding solidification process; eliminating a lamellar tissue structure formed by spray forming through semisolid upsetting, and compacting a blank; the wire obtained after hot extrusion and drawing has fine and compact crystal grains, uniform structure, clear grain boundary interface, no precipitate and no lamellar structure, and has good mechanical property, tissue property and welding property. The welding process has universality for welding 7XXX series high-strength aluminum alloy, can provide high-quality raw materials for 7XXX series high-strength aluminum alloy welding, and can obtain a wider high-strength aluminum alloy welding process window.
Drawings
FIG. 1 is an external view of a welded joint obtained by welding 7075 base metal with the welding wire of example 3; the reference numerals 1-9 in the figures represent the appearance of the welded joint under different welding process conditions, the specific process being as follows in table 1.
Table 1 different welding process conditions for the numerals 1-9 in FIG. 1
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The numerical values set forth in these examples do not limit the scope of the present invention unless specifically stated otherwise. Techniques, methods known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
The experimental methods in the following examples, for which specific conditions are not noted, are generally determined according to national standards; if the national standard is not corresponding, the method is carried out according to the general international standard or the standard requirements set by related enterprises. Unless otherwise indicated, all parts are parts by weight and all percentages are percentages by weight.
Example 1
A production method of a high-strength aluminum alloy universal welding wire comprises the following steps:
(1) Preparing Al-Zn-Mg-Cu aluminum alloy, uniformly mixing B simple substance and Zr simple substance, melting the alloy, and then performing spray forming to obtain a blank with the diameter of 220 mm;
wherein the Al-Zn-Mg-Cu aluminum alloy comprises the following elements in percentage by weight: zn7.8%, mg 2.3%, cu 2% and the balance Al, which is marked as Al-7.8Zn-2.3Mg-2Cu aluminum alloy;
wherein the addition amount of the simple substance B is 0.1% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy, and the addition amount of the simple substance Zr is 0.1% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy;
semi-solid upsetting is carried out on the blank at 460 ℃ to obtain an ingot blank with the diameter of 178mm, and the ingot blank is subjected to hot extrusion at 380 ℃ to obtain a plurality of bars with the diameter of 5.8mm, and the bars are coiled;
(2) And (3) placing the coiled bar in a vacuum annealing furnace, annealing at 300 ℃ for 10 hours, cooling along with the furnace, feeding the bar into a horizontal roller die drawing machine, continuously rolling and drawing the bar to the diameter required by the finished product wire in multiple passes, wherein the compression ratio of the drawing surface in each pass is 6-8%, the diameter of the obtained welding wire is 0.8-1.6mm and is different in specification, sequentially feeding the welding wire into a sizing die for sizing and rounding, a polycrystalline die for polishing, a scraping die for fine scraping, cleaning and drying, and obtaining the high-strength aluminum alloy universal welding wire.
Example 2
The preparation process of the high-strength aluminum alloy universal welding wire is the same as that of the embodiment 1, except that the addition amount of the simple substance B is 0.2% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy, and the addition amount of the simple substance Zr is 0.5% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy.
Example 3
The preparation process of the high-strength aluminum alloy universal welding wire is the same as that of the embodiment 1, except that the addition amount of the simple substance B is 0.2% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy, and the addition amount of the simple substance Zr is 0.3% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy.
Example 4
The preparation process of the high-strength aluminum alloy universal welding wire is the same as that of the embodiment 1, except that the addition amount of the simple substance B is 0.4% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy, and the addition amount of the simple substance Zr is 0.4% of the weight of the Al-7.8Zn-2.3Mg-2Cu aluminum alloy.
Comparative example 1
The process for preparing the high-strength aluminum alloy universal welding wire of this comparative example was the same as in example 3, except that no B and Zr were added.
The mechanical properties of the welding wires of the above examples and comparative examples are shown in Table 1.
Table 1 mechanical properties of the welding wire of examples and comparative examples
(note: welding wires each having a diameter of 1.2 mm)
Welding process tests were performed on different grades of 7XXX series aluminum alloys using the welding wires produced in the examples and comparative examples described above. TIG 4300i AC/DC inverter type AC/DC argon arc welder produced by ESAB company is selected, the wire feeder is a WF-007A multifunctional automatic argon arc wire feeder, the diameter is 1.2mm, the current is a variable parameter, and other parameters are: voltage: 20V; arc length: 3.2mm; wire feeding angle: 30 °; wire feed speed: 140cm/min; welding speed: 3mm/s; argon flow rate: 10L/min. The welding wires produced in each example and comparative example were used to weld a base metal of a 7XXX series high strength aluminum alloy (7050, 7055, 7075), and then subjected to a T6 heat treatment or not, thereby obtaining a test sample, according to GB/T228.1-2010 metal material drawing experiment part 1: and (3) carrying out mechanical property test on the room-temperature tensile mechanical property of the welding part by using a room-temperature tensile method, arranging two parallel samples in each group of heat treatment samples, and taking an average value. The test results are shown in Table 4.
The appearance of the welded joint obtained by welding 7075 base metal with the welding wire of example 3 is shown in fig. 1, and the results of the welding process and the performance before and after heat treatment are shown in table 3.
TABLE 3 mechanical Properties of the welding wire pair 7075 base Material welded Joint before and after Heat treatment
As can be seen from Table 3 and FIG. 1, the welding wire of example 3 has better welding performance when argon arc welding is performed on 7075 base metal under 160-165A current, and the welding wire has tensile strength of more than 270MPa and elongation of more than 5.5% before T6 heat treatment; the T6 heat-treated welding wire has tensile strength of more than 500MPa and elongation of more than 13%, and the welding wire of the embodiment 3 has better welding performance on 7075 parent metal.
Table 4 mechanical properties of the example welding wire before and after heat treatment of a welded joint of a 7XXX series aluminum alloy at current 165A
As is clear from Table 4, the welding wire of example 1 (Al-7.8 Zn-2.3Mg-2Cu base with 0.1% B+0.1% Zr) has good welding performance to 7050 base material, 7055 base material and 7075 base material, respectively, and the tensile strength of the joint is improved by 85.7% and the elongation is improved to 12.36% after the 7050 base material is welded before and after the heat treatment; after 7055 base metal is welded, the tensile strength of the joint is improved by 96.2%, and the elongation is improved to 12.88%; after 7075 base metal is welded, the tensile strength of the joint is improved by 92.7%, and the elongation is improved to 12.47%.
The welding wire (0.2 percent B+0.5 percent Zr is added to Al-7.8Zn-2.3Mg-2Cu base) of the embodiment 2 has better welding performance on 7050 base metal, 7055 base metal and 7075 base metal respectively, and the tensile strength of the joint is improved by more than 100 percent after the 7050 base metal is welded before and after heat treatment, and the elongation is improved to 11 percent; after 7055 base metal is welded, the tensile strength of the joint is improved by 94.6%, and the elongation is improved to 12.42%; after 7075 base metal is welded, the tensile strength of the joint is improved by more than 100%, and the elongation is improved to 12.38%.
The welding wire (0.2 percent B+0.3 percent Zr is added to Al-7.8Zn-2.3Mg-2Cu base) of the embodiment 3 has better welding performance on 7050 base metal, 7055 base metal and 7075 base metal respectively, the tensile strength of the joint is improved by 92.4 percent after the 7050 base metal is welded before and after heat treatment, and the elongation is improved to 12.79 percent; after 7055 base metal is welded, the tensile strength of the joint is improved by more than 100%, and the elongation is improved to 12.56%; after 7075 base metal is welded, the tensile strength of the joint is improved by 88.3%, and the elongation is improved to 13.76%.
The welding wire (0.4 percent B+0.4 percent Zr is added to Al-7.8Zn-2.3Mg-2Cu base) of the embodiment 4 has better welding performance on 7050 base metal, 7055 base metal and 7075 base metal respectively, the tensile strength of the joint is improved by 94.1 percent after the 7050 base metal is welded before and after heat treatment, and the elongation is improved to 13.24 percent; after 7055 base metal is welded, the tensile strength of the joint is improved by more than 100%, and the elongation is improved to 12.84%; after 7075 base metal is welded, the tensile strength of the joint is improved by 92.0%, and the elongation is improved to 13.24%.
The data show that the welding wire prepared by adding less than 1% of the total amount of B and Zr into the Al-7.8Zn-2.3Mg-2 Cu-based aluminum alloy has better welding performance on 7XXX series high-strength aluminum alloy, and the welded joint has higher tensile strength and elongation, has universality on the welding of 7XXX series high-strength aluminum alloy, especially Al-Zn-Mg-Cu series high-hardness aluminum alloy, such as 7050, 7055, 7075 and the like, and can provide high-quality welding wire for the welding of 7XXX series high-strength aluminum alloy, thereby obtaining wider welding process window of the high-strength aluminum alloy.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. A method for producing a 7XXX series aluminum alloy universal welding wire, comprising the steps of:
(1) Mixing Al-Zn-Mg-Cu aluminum alloy with B, zr, then carrying out alloy melting, and then carrying out spray forming to obtain a blank; semi-solid upsetting is carried out on the blank to form an ingot blank, and hot extrusion is carried out on the ingot blank to obtain a bar material and the bar material is coiled; the Al-Zn-Mg-Cu aluminum alloy comprises the following elements in percentage by weight: 7.8% of Zn, 2.3% of Mg, 2% of Cu, 0.1-0.5% of B by weight of the Al-Zn-Mg-Cu aluminum alloy, 0.1-0.5% of Zr by weight of the Al-Zn-Mg-Cu aluminum alloy, and the balance of Al;
the semi-solid upsetting is upsetting the blank at 460 ℃; the temperature of the hot extrusion is 380 ℃, and the ingot blank with the diameter of 178mm is hot extruded into bars with the diameter of 5.8 mm;
(2) Annealing the coiled bar, wherein the annealing temperature is 300 ℃, and the heat preservation is carried out for 10 hours; and then carrying out continuous multipass rolling drawing to the required diameter of the welding wire, and sequentially carrying out sizing rounding, glomerocryst rolling, fine scraping, cleaning and drying to obtain the 7XXX series aluminum alloy universal welding wire.
2. The method for producing a universal welding wire for 7XXX series aluminum alloys according to claim 1, wherein the rolling drawing in step 2 is a continuous drawing of at least 5 passes in a horizontal roller die drawing machine, each pass having a reduction of 6-8% and a drawing to a diameter of 0.8-1.6 mm.
3. A 7XXX series aluminum alloy universal welding wire obtained by the preparation method of claim 1 or 2, wherein the welding wire uses an Al-Zn-Mg-Cu series aluminum alloy as a matrix, and B and Zr are added, so that the welding wire has welding versatility for the Al-Zn-Mg-Cu series aluminum alloy.
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| CN202211144550.1A CN115430945B (en) | 2022-09-20 | 2022-09-20 | High-strength aluminum alloy universal welding wire and production method thereof |
| JP2023099365A JP2024044996A (en) | 2022-09-20 | 2023-06-16 | High strength aluminum alloy general-purpose welding wire and its manufacturing method |
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| CN202211144550.1A CN115430945B (en) | 2022-09-20 | 2022-09-20 | High-strength aluminum alloy universal welding wire and production method thereof |
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