CN110315242A - A kind of preparation method of Novel super-thin grained aluminium alloy welding wire - Google Patents
A kind of preparation method of Novel super-thin grained aluminium alloy welding wire Download PDFInfo
- Publication number
- CN110315242A CN110315242A CN201910413103.3A CN201910413103A CN110315242A CN 110315242 A CN110315242 A CN 110315242A CN 201910413103 A CN201910413103 A CN 201910413103A CN 110315242 A CN110315242 A CN 110315242A
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- Prior art keywords
- welding wire
- aluminium alloy
- preparation
- novel super
- alloy welding
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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
-
- 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
Abstract
The present invention provides a kind of preparation method of Novel super-thin grained aluminium alloy welding wire, and the Al of Zn:6.0%-12.0%, Mg:1.0%-3.0%, Zr:0.1%-0.3%, Er:0.1%-0.5%, Cu:0.25%-2.5%, impurity element total amount≤0.15%, surplus is taken to be smelted into solution by weight percentage；Solution is refined；Filtering, injection forming, obtain aluminium alloy ingot.The utility model has the advantages that preparation process is reasonable brought by of the invention, success rate is high, the problem of being not in uneven element cyrystal boundary segregation and crystal grain, cracking, superfluous crystalline phase particle size in the welding wire prepared by the technique is tiny, even dispersion distribution, drawing is avoided to break, welding wire yield rate is improved, reduces production cost, and the welding performance and weld metal intensity of welding wire can be improved.
Description
Technical field
The invention belongs to welding wire preparation process field more particularly to a kind of preparation sides of Novel super-thin grained aluminium alloy welding wire
Method.
Background technique
7 line aluminium alloys have good specific strength, fracture toughness and processing performance, are widely used in aerospace, rail
In the fields such as road vehicle, automobile and shipbuilding.The application of extra super duralumin alloy is mainly shaped with squeezing with contour forging technique at present, is seldom adopted
With welded connecting.Main cause is the generally existing following technical problem of welding: 1, aluminium alloy thermal conductivity is big, and when welding needs
Higher heat input, under same speed of welding, heat input is 2-4 times big than just now.2, the aluminium alloy wire coefficient of expansion is big, easily
Generate welding deformation.7 line aluminium alloys are due to its own feature, and in addition to above-mentioned Welding Problems, there is also other to weld problem:
There are more low boiling point Zn, Mg alloying element in alloy, scaling loss is serious in the welding process, and hardening constituent is such as in soldered
MgZn2It reduces, leads to soldered strength reduction.In welding, welding region undergoes the Thermal Cycle of higher temperature, heat affecting
Area occurs overaging and grain coarsening and seriously softens, and factors above limits further applying for extra super duralumin alloy.This field
Technical staff is welded for the welding method of 7055 welding comparative maturity using agitating friction, but agitating friction weldering is big opposite
Craft flexibility, it is difficult to weld complicated soldered.These limitations limit 7055 aluminium alloys on large-scale lightweight structure part
Application.
Summary of the invention
In order to solve the low technical problem of weld strength coefficient after existing 7055 aluminum alloy piping welding, the present invention provides one kind
The preparation method of Novel super-thin grained aluminium alloy welding wire, prepared by welding wire for welding 7055 aluminium alloys so that soldered
Weld strength coefficient meets the requirements.In order to which some aspects of the embodiment to disclosure have a basic understanding, it is shown below
It is simple to summarize.The summarized section is not extensive overview, nor to determine key/critical component or describe these implementations
The protection scope of example.Its sole purpose is that some concepts are presented with simple form, in this, as the sequence of following detailed description
Speech.
The present invention adopts the following technical scheme:
In some alternative embodiments, a kind of preparation method of Novel super-thin grained aluminium alloy welding wire, includes the following steps,
S1: Zn:6.0%-12.0%, Mg:1.0%-3.0%, Zr:0.1%-0.3%, Er:0.1%- are taken by weight percentage
0.5%, Cu:0.25%-2.5%, impurity element total amount≤0.15%, surplus Al be smelted into solution；
S2: solution is refined；
S3: filtering, injection forming obtain aluminium alloy ingot.
Wherein, in the step S2:
Lead to argon gas when refining at solution depth 2/3.
Wherein, in the step S3:
5 ° -50 ° of spray angle, atomizing pressure 0.15MPa-1.5MPa, 650 DEG C -850 DEG C of atomization temperature receives disk rotating speed
25rpm-120rpm, take-up reel speed 2mm/s-10mm/s.
Wherein, further include,
Step S4: extrusion molding；
Wherein, the method for the extrusion molding of the step S4 are as follows:
S401: aluminium alloy ingot is heated to 420 DEG C -460 DEG C, keeps the temperature 10h-13h；
S402: aluminium alloy ingot is transferred in extrusion cylinder and is squeezed；
S403: secondary extrusion；
S404: 2h-6h annealing is kept the temperature at 410 DEG C -450 DEG C；
S405: drawing process is carried out after stripping off the skin.
Wherein, in the step S402:
Extrusion die preheating temperature is 380 DEG C -440 DEG C, 380 DEG C -440 DEG C of extrusion cylinder preheating temperature.
Wherein, in the step S402:
Extrusion speed is 0.15mm/s-0.6mm/s, is squeezed into the bar of φ 160mm.
Wherein, in the step S403:
Secondary extrusion at φ 12mm wire rod.
Wherein, in the step S405:
Drawing number is 8-16 passage, pulls into the welding wire of 1.6 two kinds of φ 1.2, φ specifications.
The utility model has the advantages that preparation process is reasonable brought by of the invention, it is not in element cyrystal boundary segregation and crystalline substance that success rate is high
The problem of grain is uneven, cracking, the superfluous crystalline phase particle size in welding wire prepared by the technique is tiny, even dispersion point
Cloth avoids drawing from breaking, and improves welding wire yield rate, reduces production cost, and can improve the welding performance and weld seam gold of welding wire
Belong to intensity.
For the above and related purposes, one or more embodiments include being particularly described below and in claim
In the feature that particularly points out.Certain illustrative aspects are described in detail in the following description and the annexed drawings, and its instruction is only
Some modes in the utilizable various modes of the principle of each embodiment.Other benefits and novel features will be under
The detailed description in face is considered in conjunction with the accompanying and becomes obvious, the disclosed embodiments be all such aspects to be included and they
Be equal.
Detailed description of the invention
Fig. 1 is laser-MIG weld seam of the present invention center metallograph；
Fig. 2 is GTAW Weld pipe mill metallograph of the present invention.
Specific embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Practice them.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.
The range of embodiment of the present invention include claims entire scope and claims it is all obtainable etc.
Jljl.
In some illustrative embodiments, a kind of preparation method of Novel super-thin grained aluminium alloy welding wire: including walking as follows
Suddenly,
S1: Zn:6.0%-12.0%, Mg:1.0%-3.0%, Zr:0.1%-0.3%, Er are taken by weight percentage:
0.1%-0.5%, Cu:0.25%-2.5%, the Al of surplus and impurity element add coverture in smelting furnace, 655 DEG C-
Solution is smelted at 880 DEG C；Wherein, impurity element total amount≤0.15%, single impurity content≤0.05%, impurity element
Inevitable impurity during being chosen for raw material.Essential element acts in welding wire, Zr, Er: the Al of generation3Zr、Al3Er、Al3
(Zr, Er) can refine weld grain, inhibit the effect of recrystallization, improve weld strength, toughness and corrosion resistance；Mg: it provides
Weld seam heat resistanceheat resistant crackle ability.Zn and Mg, which has an effect, generates MgZn2Hardening constituent can play precipitation enhancement.The welding wire mesh
It is preceding to be successfully prepared using conventional casting methods, it may appear that the problems such as element cyrystal boundary segregation, crystal grain are uneven, crack,
And the alloy is prepared using the method for injection forming, not will receive the limitation of alloy content, can perfection prepare it is relevant
Ingot blank part avoids a series of defects of conventional cast bring.The ingot blank of this method production is saved without carrying out Homogenization Treatments
The energy shortens welding wire production process, and the superfluous crystalline phase particle size in the welding wire is tiny, even dispersion is distributed, and reduces drawing
Broken string improves welding wire yield rate, reduces production cost, can improve the welding performance and weld metal intensity of welding wire.
S2: refining solution, and refining temperature is 680 DEG C -850 DEG C, stands 20-30min after refining.Molten when refining
Lead to argon gas 40min at body depth 2/3.
S3: filtering, injection forming obtain aluminium alloy ingot.5 ° -50 ° of spray angle, atomizing pressure 0.15MPa-
1.5MPa, 650 DEG C -850 DEG C of atomization temperature receive disk rotating speed 25rpm-120rpm, take-up reel speed 2mm/s-10mm/s.
Step S4: extrusion molding:
S401: the aluminium alloy ingot that diameter is 500mm is heated to 420 DEG C -460 DEG C, keeps the temperature 10h-13h；
S402: extrusion die preheating temperature is 380 DEG C -440 DEG C, 380 DEG C -440 DEG C of extrusion cylinder preheating temperature.By aluminium alloy
Ingot blank is transferred in extrusion cylinder and is squeezed；Extrusion speed is exactly primary push rod speed, is 0.15mm/s-0.6mm/s, is squeezed into ruler
The very little bar for φ 160mm.
S403: secondary extrusion；Secondary extrusion at φ 12mm wire rod.
S404: 2h-6h annealing is kept the temperature at 410 DEG C -450 DEG C；
S405: drawing process is carried out after stripping off the skin.Drawing number is 8-16 passage, pulls into φ 1.2, φ 1.6 two kinds of specifications
Welding wire is finally processed by shot blasting.
The welding wire that above-mentioned preparation is completed carries out Laser-MIG Composite Welding method to 7055 aluminium alloys, and this method is to pass through
Laser and the heat source of both different physical properties of MIG electric arc and energy transmission mechanism are interacted, is overlapped mutually and is formed
A kind of high energy efficiency heat source acting on same molten bath makes to be applied to molten bath by the mutually coordinated effect of two heat sources and compound
Laser has high S. E. A. and welding adaptability, and since laser is to the compression of MIG electric arc, increases heat source collection
Moderate further improves welding penetration.Bis- " V " grooves are carried out out to place's base material to be welded of aluminium alloy, can make 10mm,
The welding point tensile strength of 15mm, 20mm different-thickness is about 380MPa, and elongation percentage reaches 4%-8%, after post weld heat treatment
Weld strength reaches 580MPa.After welding wire welding of the invention, weld porosity is few, and Weld pipe mill is in equi-axed crystal, crystal grain
Tiny, flawless generates, and 10mm7055 laser-MIG weld seam center metallograph is as shown in Figure 1.
Using welding wire prepared by the present invention in 7055-T74 aluminium alloy argon tungsten-arc welding (GTAW) welding of 10mm, weldering
It connects strength of joint and reaches 350MPa, weld strength reaches 450MPa after post weld heat treatment, and elongation percentage reaches 4%-7%, weld seam gas
Hole is few, and Weld pipe mill is in equi-axed crystal, and crystal grain is tiny, and flawless generates, and Weld pipe mill metallograph is as shown in Figure 2
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent substitution, improvement and etc. done be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire, it is characterised in that: include the following steps,
S1: Zn:6.0%-12.0%, Mg:1.0%-3.0%, Zr:0.1%-0.3%, Er:0.1%- are taken by weight percentage
0.5%, Cu:0.25%-2.5%, impurity element total amount≤0.15%, surplus Al be smelted into solution；
S2: solution is refined；
S3: filtering, injection forming obtain aluminium alloy ingot.
2. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 1, it is characterised in that:
In the step S2:
Lead to argon gas when refining at solution depth 2/3.
3. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 2, it is characterised in that:
In the step S3:
5 ° -50 ° of spray angle, atomizing pressure 0.15MPa-1.5MPa, 650 DEG C -850 DEG C of atomization temperature receives disk rotating speed
25rpm-120rpm, take-up reel speed 2mm/s-10mm/s.
4. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 3, it is characterised in that: also wrap
It includes,
Step S4: extrusion molding.
5. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 4, it is characterised in that: the step
The method of the extrusion molding of rapid S4 are as follows:
S401: aluminium alloy ingot is heated to 420 DEG C -460 DEG C, keeps the temperature 10h-13h；
S402: aluminium alloy ingot is transferred in extrusion cylinder and is squeezed；
S403: secondary extrusion；
S404: 2h-6h annealing is kept the temperature at 410 DEG C -450 DEG C；
S405: drawing process is carried out after stripping off the skin.
6. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 5, it is characterised in that: the step
In rapid S402:
Extrusion die preheating temperature is 380 DEG C -440 DEG C, 380 DEG C -440 DEG C of extrusion cylinder preheating temperature.
7. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 6, it is characterised in that: the step
In rapid S402:
Extrusion speed is 0.15mm/s-0.6mm/s, is squeezed into the bar of φ 160mm.
8. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 7, it is characterised in that: the step
In rapid S403:
Secondary extrusion at φ 12mm wire rod.
9. a kind of preparation method of Novel super-thin grained aluminium alloy welding wire according to claim 8, it is characterised in that: the step
In rapid S405:
Drawing number is 8-16 passage, pulls into the welding wire of 1.6 two kinds of φ 1.2, φ specifications.
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Cited By (3)
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| CN111069609A (en) * | 2019-12-19 | 2020-04-28 | 江苏豪然喷射成形合金有限公司 | Welding wire preparation process suitable for spray forming ultrahigh-strength aluminum alloy plate fusion welding |
| CN111411272A (en) * | 2020-03-23 | 2020-07-14 | 西安交通大学 | Al-Zn-Mg series aluminum alloy welding wire for electric arc additive manufacturing and preparation method thereof |
| CN114012305A (en) * | 2021-11-05 | 2022-02-08 | 江苏豪然喷射成形合金有限公司 | Welding wire for spray forming of aluminum-lithium alloy and preparation method thereof |
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| CN111069609A (en) * | 2019-12-19 | 2020-04-28 | 江苏豪然喷射成形合金有限公司 | Welding wire preparation process suitable for spray forming ultrahigh-strength aluminum alloy plate fusion welding |
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| CN114012305A (en) * | 2021-11-05 | 2022-02-08 | 江苏豪然喷射成形合金有限公司 | Welding wire for spray forming of aluminum-lithium alloy and preparation method thereof |
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