CN111139385B - A kind of aluminum alloy welding wire containing ceramic particles and its preparation method and application - Google Patents
A kind of aluminum alloy welding wire containing ceramic particles and its preparation method and application Download PDFInfo
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- CN111139385B CN111139385B CN201911411516.4A CN201911411516A CN111139385B CN 111139385 B CN111139385 B CN 111139385B CN 201911411516 A CN201911411516 A CN 201911411516A CN 111139385 B CN111139385 B CN 111139385B
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- 239000002245 particle Substances 0.000 title claims abstract description 74
- 238000003466 welding Methods 0.000 title claims abstract description 71
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 62
- 239000000919 ceramic Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229910033181 TiB2 Inorganic materials 0.000 claims abstract description 29
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 14
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 14
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 14
- 238000005266 casting Methods 0.000 claims description 20
- 238000009749 continuous casting Methods 0.000 claims description 15
- 238000000265 homogenisation Methods 0.000 claims description 13
- 230000005672 electromagnetic field Effects 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000000137 annealing Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000007670 refining Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910020491 K2TiF6 Inorganic materials 0.000 claims description 5
- 229910020261 KBF4 Inorganic materials 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000009849 vacuum degassing Methods 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 2
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims 10
- 241001062472 Stokellia anisodon Species 0.000 claims 1
- 239000012300 argon atmosphere Substances 0.000 claims 1
- 238000005554 pickling Methods 0.000 claims 1
- 239000002893 slag Substances 0.000 claims 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major 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
- B23K35/22—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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1047—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites
- C22C1/1052—Alloys containing non-metals starting from a melt by mixing and casting liquid metal matrix composites by mixing and casting metal matrix composites with reaction
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses an aluminum alloy welding wire containing ceramic particles and a preparation method and application thereof. The aluminum alloy welding wire comprises the following elements in percentage by weight: zn: 12.5-14.5%, Mg: 1.8-3.0%, Cu: 3.0-4.5%, Zr: 0.02-0.3%, Cr: 0.03-0.3%, Fe: 0.01-0.4%, Si: 0.01-0.3%, Mn: 0.01-0.4%, TiB2Less than or equal to 6 percent of ceramic particles and the balance of Al; wherein, TiB2The ceramic particles have a particle size of 1-10 microns.
Description
Technical Field
The invention relates to the technical field of aluminum alloy welding wires, in particular to an aluminum alloy welding wire containing ceramic particles and a preparation method and application thereof.
Background
The aluminum alloy has the advantages of high specific strength and high specific rigidity, and is widely applied to the fields of aerospace, transportation and the like. With the rapid development of high and new technologies, the requirements on the high and new technologies are higher and higher, and safety, environmental protection, energy conservation and emission reduction become the most important development direction at present. Especially, the 7XXX series high-strength aluminum alloy becomes the most promising lightweight material with excellent comprehensive performance and is commonly concerned by experts of scholars at home and abroad.
However, the 7XXX series high strength aluminum alloy has poor welding performance, and has a series of problems of large tendency of crack of a welding joint, serious softening of the joint, deformation and the like. When the commonly used Al-Mg welding wire is adopted, the welding seam is easy to crack, the strength of the welding seam can only be stabilized to about 300MPa at most, and the requirements of high specific strength and high specific rigidity can not be met.
Researches show that the introduction of the nano particles not only can effectively refine grains and improve the size and distribution of a second phase, but also can fundamentally eliminate the hot cracking sensitivity of the material.
Therefore, the development of an aluminum alloy welding wire containing ceramic particles is urgently needed, the welding seam strength and the thermal stability are improved, and the problem that 7XXX series aluminum alloy welding is easy to crack is solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an aluminum alloy welding wire containing ceramic particles and a preparation method thereof, wherein the aluminum alloy welding wire is used for improving the strength and the thermal stability of a welding seam.
In order to solve the technical problems, the invention adopts the following technical scheme:
an aluminum alloy welding wire containing ceramic particles is characterized by comprising the following elements in percentage by weight: zn: 12.5-14.5%, Mg: 1.8-3.0%, Cu: 3.0-4.5%, Zr: 0.02-0.3%, Cr: 0.03-0.3%, Fe: 0.01-0.4%, Si: 0.01-0.3%, Mn: 0.01-0.4%, TiB2Less than or equal to 6 percent of ceramic particles and the balance of Al; wherein, TiB2The ceramic particles have a particle size of 1-10 microns.
In a preferred embodiment of the invention, the aluminum alloy welding wire comprises the following elements in percentage by weight: 12.5% Zn, 1.8% Mg, 3.0% Cu, 0.2% Zr, 0.15% Cr, 0.3% Fe, 0.2% Si, 0.4% Mn, TiB26 percent of ceramic particles and the balance of Al, wherein TiB2The ceramic particles have a particle size of 1-3 microns.
In a preferred embodiment of the invention, the aluminum alloy welding wire comprises the following elements in percentage by weight: zn: 13-14.5%, Mg: 2.1-2.6%, Cu: 3.0-4.0%, Zr: 0.02-0.3%, Cr: 0.03-0.3%, Fe: 0.01-0.4%, Si: 0.01-0.3%, Mn: 0.01-0.4%, TiB2Less than or equal to 4 percent of ceramic particles and the balance of Al.
In a preferred embodiment of the invention, the aluminum alloy welding wire comprises the following elements in percentage by weight: 14.5% of Zn, 2.2% of Mg, 4% of Cu, 0.15% of Zr, 0.1% of Cr, 0.2% of Fe, 0.15% of Si,mn 0.15%, TiB23.5 percent of ceramic particles and the balance of Al, wherein TiB2The ceramic particles have a particle size of 4 to 7 microns.
In a preferred embodiment of the invention, the aluminum alloy welding wire comprises the following elements in percentage by weight: zn: 13-14%, Mg: 2.5-2.6%, Cu: 3.0-3.5%, Zr: 0.02-0.3%, Cr: 0.03-0.3%, Fe: 0.01-0.4%, Si: 0.01-0.3%, Mn: 0.01-0.4%, TiB2Less than or equal to 2 percent of ceramic particles and the balance of Al.
In a preferred embodiment of the invention, the aluminum alloy welding wire comprises the following elements in percentage by weight: 13% Zn, 2.6% Mg, 3.5% Cu, 0.15% Zr, 0.03% Cr, 0.03% Fe, 0.02% Si, 0.04% Mn, TiB21.5 percent of ceramic particles and the balance of Al, wherein TiB2The ceramic particles have a particle size of 8-10 microns.
The invention also discloses a preparation method of the aluminum alloy welding wire containing the ceramic particles, which is characterized by comprising the following steps of:
s1: in situ synthesis reaction
Melting pure aluminum, adding covering agent, covering uniformly, heating for smelting, and mixing uniformly mixed KBF4、K2TiF6Drying the powder, adding the dried powder into the melt obtained by smelting, stirring, adding other compounds containing elements after the reaction is finished and slagging off, then adding a refining agent for refining, and performing vacuum degassing to obtain aluminum alloy metal liquid containing ceramic particles;
s2: ultrasonic electromagnetic semi-continuous casting
Stirring the molten metal obtained in the step S1 uniformly, and performing ultrasonic electromagnetic semi-continuous casting in an argon environment to obtain an ingot;
s3: homogenization
Carrying out homogenization annealing on the cast ingot obtained in the step S2 to obtain a casting blank;
s4: extrusion
Extruding the casting blank obtained in the step S3 into an aluminum alloy wire blank, wherein the extrusion ratio is 10-15;
s5: high temperature drawing
Preheating the aluminum alloy wire blank obtained in the step S4 to 400-420 ℃, and performing multi-pass drawing between 400-420 ℃ to obtain welding wires with different specifications;
s6: surface treatment
And (4) carrying out acid washing, polishing and grinding on the welding wire obtained in the step S5.
In a preferred embodiment of the invention, in the step S2, when the melt temperature is reduced to 710-730 ℃, semi-continuous casting is started, the speed is controlled to be 30-50mm/min when the casting is started, the cooling water amount is 70-90L/min, then the casting speed is gradually increased to 60-100mm/min, after the speed is stabilized, the electromagnetic field is started to be applied, the current is applied to be I (55-65A), the frequency is f (5-35Hz), when the ingot length is 110-130mm, the ultrasonic field is applied while the electromagnetic field is applied, and the ultrasonic power is 70-210W.
In a preferred embodiment of the present invention, the step S3 homogenizes the annealing temperature to 465-475 degrees.
The invention also discloses an application of the aluminum alloy welding wire containing the ceramic particles in electric arc additive manufacturing.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention solves the problems of low welding strength and easy hot cracking of the 7XXX series aluminum alloy. By adopting the welding wire to weld the 7XXX series aluminum alloy, the thermal stability and the welding line strength of the welding line can be obviously improved.
2) The welding wire ingot casting is prepared by adopting an ultrasonic electromagnetic semi-continuous casting process, so that the uniform distribution of particles in the structure can be realized, and the crystal grains are refined.
3) High-temperature drawing is adopted, so that the forming quality of the welding wire can be obviously improved, and the stability of arc welding is improved.
4) The internal structure of the 7XXX series aluminum alloy cast by the (ultrasonic field + electromagnetic field) composite field is obviously improved, and the advantages of a single magnetic field and a single ultrasonic field are combined. The ultrasound field compensates for the "skin effect" of the electromagnetic field, which compensates for the "focusing effect" of the ultrasound field.
5) The method of adding ceramic particles to the matrix can also be applied to materials other than 7XXX aluminum alloy, which are easy to generate heat cracks in the welding process.
6) The invention provides a new idea for other material systems which are difficult to weld and is expected to improve the welding among different materials.
7) TiB of the invention2The ceramic particles account for less than or equal to 6 percent of the total weight of the welding wire, effectively improves the comprehensive performance of the welding wire, if TiB2The ceramic particles exceed 6 percent of the total weight of the welding wire, which can cause the defects of welding wire materials, gas holes, looseness, poor welding seam performance and the like.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
Example 1
An aluminum alloy welding wire containing ceramic particles comprises the following elements in percentage by weight: 12.5% Zn, 1.8% Mg, 3.0% Cu, 0.2% Zr, 0.15% Cr, 0.3% Fe, 0.2% Si, 0.4% Mn, TiB26 percent of ceramic particles and the balance of Al, wherein TiB2The ceramic particles have a particle size of 1-3 microns.
The preparation method of the aluminum alloy welding wire containing the ceramic particles in the embodiment 1 comprises the following specific steps:
s1: in situ synthesis reaction
Melting pure aluminum, adding covering agent, covering uniformly, heating for smelting, and mixing uniformly mixed KBF4、K2TiF6Drying the powder, adding the dried powder into the melt obtained by smelting, stirring, adding other compounds containing elements after the reaction is finished and slagging off, then adding a refining agent for refining, and performing vacuum degassing to obtain aluminum alloy metal liquid containing ceramic particles;
s2: ultrasonic electromagnetic semi-continuous casting
Stirring the molten metal obtained in the step S1 uniformly, and performing ultrasonic electromagnetic semi-continuous casting in an argon environment to obtain an ingot; when the temperature of the melt is reduced to 710-730 ℃, semi-continuous casting is started, the speed is controlled at 40mm/min when the casting is started, the cooling water amount is 70L/min, then the casting speed is gradually increased to 90mm/min, after the speed is stabilized, an electromagnetic field is started to be applied, the applied current is I (55-65A), the frequency f is 5Hz, when the length of the ingot is 110-130mm, an ultrasonic field is applied while the electromagnetic field is applied, and the ultrasonic power is 70W;
s3: homogenization
Carrying out homogenization annealing on the ingot obtained in the step S2 to obtain a casting blank, wherein the homogenization annealing temperature is 465-475 ℃;
s4: extrusion
Extruding the casting blank obtained in the step S3 into an aluminum alloy wire blank, wherein the extrusion ratio is 10-15;
s5: high temperature drawing
Preheating the aluminum alloy wire blank obtained in the step S4 to 400-420 ℃, and performing multi-pass drawing between 400-420 ℃ to obtain welding wires with different specifications;
s6: surface treatment
And (4) carrying out acid washing, polishing and grinding on the welding wire obtained in the step S5.
Example 2
An aluminum alloy welding wire containing ceramic particles comprises the following elements in percentage by weight: 14.5% of Zn, 2.2% of Mg, 4% of Cu, 0.15% of Zr, 0.1% of Cr, 0.2% of Fe, 0.15% of Si, 0.15% of Mn, and TiB23.5 percent of ceramic particles and the balance of Al, wherein TiB2The ceramic particles have a particle size of 4-7 microns.
The preparation method of the aluminum alloy welding wire containing the ceramic particles in the embodiment 2 comprises the following specific steps:
s1: in situ synthesis reaction
Melting pure aluminum, adding covering agent, covering uniformly, heating for smelting, and mixing uniformly mixed KBF4、K2TiF6Drying the powder, adding the dried powder into the melt obtained by smelting, stirring, adding other compounds containing elements after the reaction is finished and slagging off, then adding a refining agent for refining, and performing vacuum degassing to obtain aluminum alloy metal liquid containing ceramic particles;
s2: ultrasonic electromagnetic semi-continuous casting
Stirring the molten metal obtained in the step S1 uniformly, and performing ultrasonic electromagnetic semi-continuous casting in an argon environment to obtain an ingot; when the temperature of the melt is reduced to 710-730 ℃, semi-continuous casting is started, the speed is controlled at 40mm/min when the casting is started, the cooling water amount is 85L/min, then the casting speed is gradually increased to 90mm/min, after the speed is stabilized, an electromagnetic field is started to be applied, the applied current is I (55-65A), the frequency f is 20Hz, when the length of the ingot is 110-130mm, an ultrasonic field is applied while the electromagnetic field is applied, and the ultrasonic power is 140W;
s3: homogenization
Carrying out homogenization annealing on the ingot obtained in the step S2 to obtain a casting blank, wherein the homogenization annealing temperature is 465-475 ℃;
s4: extrusion
Extruding the casting blank obtained in the step S3 into an aluminum alloy wire blank, wherein the extrusion ratio is 10-15;
s5: high temperature drawing
Preheating the aluminum alloy wire blank obtained in the step S4 to 400-420 ℃, and performing multi-pass drawing between 400-420 ℃ to obtain welding wires with different specifications;
s6: surface treatment
And (4) carrying out acid washing, polishing and grinding on the welding wire obtained in the step S5.
Example 3
An aluminum alloy welding wire containing ceramic particles comprises the following elements in percentage by weight: 13% Zn, 2.6% Mg, 3.5% Cu, 0.15% Zr, 0.03% Cr, 0.03% Fe, 0.02% Si, 0.04% Mn, TiB21.5 percent of ceramic particles and the balance of Al, wherein TiB2The ceramic particles have a particle size of 8-10 microns.
The preparation method of the aluminum alloy welding wire containing the ceramic particles in the embodiment 3 comprises the following specific steps:
s1: in situ synthesis reaction
Melting pure aluminum, adding covering agent, covering uniformly, heating for smelting, and mixing uniformly mixed KBF4、K2TiF6Drying the powder, adding the dried powder into the melt obtained by smelting, stirring, adding other compounds containing elements after the reaction is finished and slagging off, then adding a refining agent for refining, and performing vacuum degassing to obtain aluminum alloy metal liquid containing ceramic particles;
s2: ultrasonic electromagnetic semi-continuous casting
Stirring the molten metal obtained in the step S1 uniformly, and performing ultrasonic electromagnetic semi-continuous casting in an argon environment to obtain an ingot; when the temperature of the melt is reduced to 710-730 ℃, semi-continuous casting is started, the speed is controlled at 40mm/min when the casting is started, the cooling water amount is 85L/min, then the casting speed is gradually increased to 90mm/min, after the speed is stabilized, an electromagnetic field is started to be applied, the applied current is I (55-65A), the frequency f is 20Hz, when the length of the ingot is 110-130mm, an ultrasonic field is applied while the electromagnetic field is applied, and the ultrasonic power is 210W;
s3: homogenization
Carrying out homogenization annealing on the ingot obtained in the step S2 to obtain a casting blank, wherein the homogenization annealing temperature is 465-475 ℃;
s4: extrusion
Extruding the casting blank obtained in the step S3 into an aluminum alloy wire blank, wherein the extrusion ratio is 10-15;
s5: high temperature drawing
Preheating the aluminum alloy wire blank obtained in the step S4 to 400-420 ℃, and performing multi-pass drawing between 400-420 ℃ to obtain welding wires with different specifications;
s6: surface treatment
And (4) carrying out acid washing, polishing and grinding on the welding wire obtained in the step S5.
Results of Performance testing
Arc additive manufacturing was performed using the aluminum alloy welding wire containing ceramic aluminum particles prepared in examples 1 to 3, and tensile properties of the fabricated test specimens were measured after T6 heat treatment, and the test standards of the test specimens were according to ASTM E8 metal tensile test standards, with the results shown in table 1 below.
| Yield strength/MPa | Breaking strength/MPa | Elongation percentage | |
| Example 1 | 490 | 595 | 9％ |
| Example 2 | 512 | 621 | 12％ |
| Example 3 | 536 | 650 | 15％ |
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
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| CN108070733A (en) * | 2017-06-12 | 2018-05-25 | 吉林大学 | A kind of novel nano titanium boride pottery aluminium combined wire wire rod |
| CN108796322A (en) * | 2018-06-15 | 2018-11-13 | 东北大学 | A kind of aluminium alloy welding wire and preparation method thereof containing nano alumina particles |
| CN110306083A (en) * | 2019-07-24 | 2019-10-08 | 上海交通大学 | High-strength and toughness aluminum-silicon matrix composite welding wire and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108070733A (en) * | 2017-06-12 | 2018-05-25 | 吉林大学 | A kind of novel nano titanium boride pottery aluminium combined wire wire rod |
| CN108796322A (en) * | 2018-06-15 | 2018-11-13 | 东北大学 | A kind of aluminium alloy welding wire and preparation method thereof containing nano alumina particles |
| CN110306083A (en) * | 2019-07-24 | 2019-10-08 | 上海交通大学 | High-strength and toughness aluminum-silicon matrix composite welding wire and preparation method thereof |
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