CN108161273A

CN108161273A - A kind of Al-Mg-Zn-Mn aluminium alloy welding wires and preparation method thereof

Info

Publication number: CN108161273A
Application number: CN201810183041.7A
Authority: CN
Inventors: 田妮; 吉猛; 周轶然; 李崇; 何长树; 赵刚; 赵骧
Original assignee: Northeastern University China
Current assignee: Northeastern University China
Priority date: 2018-03-06
Filing date: 2018-03-06
Publication date: 2018-06-15

Abstract

A kind of Al Mg Zn Mn aluminium alloy welding wires and preparation method thereof, belong to technical field of aluminum alloy technology.The ingredient and its mass percent that Al Mg Zn Mn aluminium alloy welding wires contain be：Zn：0.5~3.0%, Mg：4.5~5.5%, Mn：0.4~1.0%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity element total amount≤0.15%, single impurity content≤0.05%, surplus Al；Preparation method is：Melting, cast, be heated to hot extrusion after 200~400 DEG C of 2~6h of heat preservation pretreatments, 440~470 DEG C of 2~4h of heat preservation, be heated to 480~550 DEG C of 2~4h of heat preservation after it is obtained after rolling, intermediate annealing, bright cold-drawn.This method without high temperature it is long when Homogenization Treatments, it is energy saving, shorten welding wire production flow, reduce drawing broken string, drawing lumber recovery is improved, reduces production cost, moreover it is possible to refine weld metal microstructure, make weld metal that there is natrual ageing to strengthen ability, improve property of welded joint.

Description

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires and preparation method thereof

Technical field

The invention belongs to technical field of aluminum alloy technology, and in particular to a kind of Al-Mg-Zn-Mn aluminium alloy welding wires and its preparation side Method.

Background technology

Aluminium alloy element is much by being welded in practical applications, and the aluminum alloy junction component after welding is generally no longer It is heat-treated and is directly used, to ensure welding structural element comprehensive performance, usually require that welded joints in aluminium alloy is not required to carry out Higher intensity, plasticity and corrosion stability can be had by strengthening heat treatment.At present, the widely used welding wire of Welded is mainly 5356 aluminium alloy welding wires, this kind of welding wire mainly weld the higher aluminium alloy of some intensity, especially medium weldability type 7xxx systems aluminium Alloy, but existing 5356 aluminium alloy welding wire be commonly present weld metal without natrual ageing ability, intensity is relatively low and substrate intensity Differ larger, it is impossible to the problem of meeting using aluminum alloy welding connection member requirement.Therefore, Modern aluminum alloys welding field is urgent Exploitation is needed without strengthening heat treatment with regard to that can make welded unit especially welding point that there is good strength, plasticity and corrosion resistance phase Matched novel aluminum alloy component of weld wire.

In addition, traditional high-quality aluminum alloy welding wire is typically to be made by Direct Chill Casting (abbreviation DC castings) Standby aluminium alloy welding wire ingot casting, (left and right for 24 hours) Homogenization Treatments, then pass through extruding when then progress high temperature (550 DEG C or so) is long Or rolling obtains welding wire line base, line base carries out bright cold-drawn again after 420 DEG C of annealings, final to obtain finished product welding wire.Wherein, Homogenization Treatments process is the link other than alloy melting during most consumption energy consumption in high-quality production process of welding wire, is worth noting Be during Homogenization Treatments it also occur that the nodularization of superfluous crystalline phase and growing up, be unfavorable for follow-up thermal deformation and cold deformation add Work can also influence welding process arc stability.

Invention content

The object of the present invention is to provide a kind of Al-Mg-Zn-Mn aluminium alloy welding wires and preparation method thereof, the Al-Mg-Zn-Mn Other than containing Mg, it is micro- can also to refine weld metal containing a certain amount of Mn and Zn, Mn element for the ingredient of aluminium alloy welding wire Tissue, Zn elements can make the ability that there is weld metal natrual ageing η phases are precipitated, so as to improve strength of welded joint, solve to adopt The problem of strength of welded joint occurred when welding 7xxx line aluminium alloy base materials with 5356 aluminium alloy welding wires is relatively low.

The preparation method of new A l-Mg-Zn-Mn aluminium alloy welding wires of the present invention, need not move through high temperature it is long when Homogenization Treatments, And low-temperature short-time pretreatment is directly over to regulate and control the precipitation of the particle of disperse phase containing Mn, then directly obtained using high warm extrusion Aluminium alloy extruded line bar obtains aluminium alloy wire base using high temperature hot rolling, with energy saving, shortening welding wire production flow, reduces The phenomenon that drawing process interrupt line, improves drawing lumber recovery, welding wire production cost is greatly lowered；New A l-Mg- obtained Superfluous crystalline phase particle size in Zn-Mn aluminium alloy welding wires is tiny, even dispersion distribution, not only contributes to improve welding wire finished product Rate, and can ensure arc stability in welding process, while also ensure weld metal intensity so as to improve by the way that η phases are precipitated The comprehensive performance of welding point.

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires of the present invention, the ingredient and its mass percent contained are respectively：Zn： 0.5~3.0%, Mg：4.5~5.5%, Mn：0.4~1.0%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤ 0.25%, other impurity element total amount≤0.15%, single impurity content≤0.05%, surplus Al；

A diameter of 1.2mm of the Al-Mg-Zn-Mn aluminium alloy welding wires.

A kind of preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires of the present invention, includes the following steps：

(1) alloy melting

In resistance furnace, commercial-purity aluminium is first added in, industrial-purity zinc is added in when Al semi-moltens, is melted when Al+Zn is whole, together When, when Al+Zn melt temperatures reach 750 DEG C~770 DEG C, Al-Mn intermediate alloys are added in, when intermediate alloy all fusings, are stirred Melt is mixed, when Al+Zn+Mn melt temperatures reach 710 DEG C~730 DEG C, pure magnesium is added in, is sufficiently stirred；Then slag making, remove Gas refines, and has a power failure, and stands melt；Tapping casting when melt temperature is 710 DEG C~730 DEG C；

(2) prepared by ingot casting

By melt by direct water-cooling semi-continuous casting, Al-Mg-Zn-Mn aluminium alloy cast ingots are made；

(3) pretreatment and hot extrusion

Al-Mg-Zn-Mn aluminium alloy cast ingots are heated to 200 DEG C~400 DEG C, after keeping the temperature 2h~6h, are directly warming up to 440 DEG C~470 DEG C of heat preservation 2h~4h progress hot extrusions, extrusion ratio is 10~50, obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn；

(4) it rolls

The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 480 DEG C~550 DEG C, is rolled, obtained after keeping the temperature 2h~4h To the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm；Wherein, rolling total deformation is 80%~94%；

(5) intermediate annealing

Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 400 DEG C~440 DEG C, heat preservation 1h~ 2h, furnace cooling obtain the annealed state welding wire line base of a diameter of 3.5mm；

(6) bright cold-drawn

The annealed state welding wire line base of a diameter of 3.5mm is once stripped off the skin, to the annealed state welding wire line base after stripping off the skin into Row multi pass drawing, simultaneously take-up into disk, obtains the Al-Mg-Zn-Mn aluminium alloy welding wires of a diameter of 1.2mm to cleaning welding wire.

In the step (1), the alloy melting is carried out using graphite-clay crucible in resistance furnace.

In the step (2), a diameter of 90~130mm of the Al-Mg-Zn-Mn aluminium alloy cast ingots.

In the step (3), a diameter of 8~14mm of the aluminium alloy extruded line bars of the Al-Mg-Zn-Mn.

In the step (3), handled before aluminium alloy cast ingot hot extrusion without high temperature homogenizing annealing, but through 200 DEG C The pretreatment of~400 DEG C × 2h~6h.

In the step (3), aluminium alloy cast ingot passes through cropping milling surface treatment before squeezing.

In the step (4), the rolling carries out 4~6 passes.

In the step (4), preferably, the aluminium alloy extruded line bars of Al-Mg-Zn-Mn, through 5 passages by a diameter of 10mm line bars are rolling to a diameter of 3.5mm lines base.

In the step (6), the drawing process of aluminium alloy welding wire is bright-drawing, preferably, by a diameter of 3.5mm Annealed state welding wire line base is first stripped off the skin by flaying machine to the 3.2mm annealed state welding wire line bases of diameter, the drawing, carries out 7~8 Secondary drawing, passage drawing elongation percentage are 1.1~1.6.

The alloying elements such as suitable Mg, Zn, Mn are added in welding wire of the present invention, and it specifically act as：

The effect of Mg：Mg is main adding elements in welding wire, has β phases A1 in A1 matrixes in fusion process₃Mg₂Eutectic Tissue is precipitated, this eutectic phase both can Dispersed precipitate in crystals, play the role of dispersion-strengtherning.Alloy strength can contain with Mg The raising of amount and improve, but plasticity can decline therewith, but its plasticity will not be made excessively to reduce, the Mg meetings of usual high-content It dissolves in and solid solution is formed in aluminum substrate, so as to have the function that solution strengthening, improve the intensity of welding point.

The effect of Zn：Zinc and magnesium are added in simultaneously in aluminium, hardening constituent (MgZn can be formed₂) phase, alloy is generated apparent Invigoration effect, improve weld metal natrual ageing strengthen ability, so as to ensure the intensity of welding point.

The effect of Mn：Mn elements play microalloying, Strengthening and Toughening, can improve the anti-stress corrosion performance of alloy.Mn is not The grain structure of refinement welding wire ingot casting is only capable of, reduces the illeffects of Fe, improves recrystallization temperature, Al-Mg series solder wires is prevented to close The recrystallization process of gold, and Mn can also refine an alloy phase in weld metal crystal grain, refinement weld metal；In addition Al₆Mn Resistance of Weld Metal has certain invigoration effect.The addition of Mn can be such that Mg phases precipitate uniformly, so as to reduce aluminum alloy welding The corrosion susceptibility of connector, the stress-corrosion-cracking resistance that can particularly enable aluminum alloy to welding point are improved.With The raising of Mn contents, when Mn contents reach 1.5%, manganese content has been in alumal phasor manganese in αsolidsolution at this time In maxima solubility or so, although Al can be precipitated in almag to the maximum extent₆Mn dispersoid particles, so as to carry High weld strength, but be easy to be precipitated the extremely coarse primary phase containing manganese alloy of size, extremely coarse primary of this size The plastic deformation ability of alloy relative wire, welding performance and welded joints in aluminium alloy performance are unfavorable.Therefore, aluminium of the present invention closes The Mn contents of gold solder silk are 0.4%~1.0%.

The present invention provides a kind of Al-Mg-Zn-Mn aluminium alloy welding wires ingredients and preparation method thereof, and advantage is：

(1) present invention adds a certain amount of Zn and Mn, Mn element can on this basis using 5356 aluminium alloy welding wires as female ingredient To refine weld metal microstructure, while the Zn added in, make there are a large amount of Zn elements to pass through in welding point weld metal η phases are precipitated in natrual ageing, enhance weld metal, improve the intensity and mechanical property of welding point, solve the conjunction of 5356 aluminium The problem of strength of joint is relatively low when gold solder wire bond connects 7xxx line aluminium alloys.

(2) present invention while also adds a certain amount of Mn, Mn into 5356 aluminium alloy welding wires other than adding a certain amount of Zn In welding wire formed submicron order disperse phase particle, this welding wire in the welding process, submicron order disperse phase particle therein The core of heterogeneous forming core, can effectively refine Microstructure of Weld Metal, significantly improve weldering when can become weld seam molten pool metal solidification and crystallization Connector comprehensive mechanical property.

(3) present invention is for DC cast aluminium alloy gold welding wire ingot castings, remove high temperature it is long when Homogenization Treatments process procedure it is direct , can be significantly energy saving after hot extrusion present invention process removes homogenizing cast ingot process procedure, shorten technological process, improve Production efficiency, high warm extrusion combination high temperature hot rolling are conducive to superfluous crystalline phase particle small and dispersed and are distributed evenly in α-Al bases In body, drawing process interrupt line phenomenon is reduced, is conducive to improve the lumber recovery of follow-up bright-drawing, so as to which welding wire be greatly lowered Production cost.

(4) present invention carries out low-temperature short-time pretreatment before hot rolling, is conducive to for DC cast aluminium alloy gold welding wire ingot castings The equally distributed Al of small and dispersed that takes measurements greatly is precipitated in alloy cast ingot₆Mn disperse phase particles, this disperse phase particle can change The plasticity of kind aluminium alloy welding wire so as to improve aluminium alloy welding wire yield rate, and is conducive to improve welding wire welding performance and welding Joint performance.

(5) present invention process can be implemented on existing aluminium alloy welding wire production line, without changing existing tooling, it is not necessary to increase Oil (gas) filling device and technology investment, it is simple to operate feasible.

(6) present invention makes solvable crystallization phased soln, superfluous crystalline phase particle side by high warm extrusion combination high temperature hot rolling Boundary is round and smooth, nodularization, obtain superfluous crystalline phase particle edges are round and smooth, small and dispersed be distributed evenly in it is novel in α-Al matrixes Al-Mg-Zn-Mn aluminium alloy welding wires so as to not only increase the yield rate of Al-Mg-Zn-Mn aluminium alloy welding wires, ensure that welding Stability, while also advantageously improve welding point comprehensive performance.Finally develop a kind of novel low-cost high-quality Al-Mg- There is excellent welding performance can simultaneously significantly improve welding for Zn-Mn aluminium alloy welding wires, new A l-Mg-Zn-Mn aluminium alloy welding wires Connector comprehensive performance, the economic results in society brought therefrom are considerable.

(7) this new A l-Mg-Zn-Mn can also simultaneously enable aluminum alloy to welding point with good with good welding performance Good comprehensive performance can be widely applied to welding 3xxx systems, 4xxx systems, 5xxx systems, 6xxx systems and 7xxx line aluminium alloy components.

Specific embodiment

With reference to embodiment, the present invention is described in further detail.

In following embodiment, except specified otherwise, the reagent is purchased in market.Wherein, during alloy melting is raw materials used Al is the Al of 99.75wt.%；Mg is technical pure Mg, purity 99.9wt.%；Zn is technical pure Zn, purity 99.9wt.%； Mn is Al-Mn intermediate alloys, and specially the mass percent of Mn is 7.8wt.%.

In following embodiment, 7N01 aluminium alloy sheet weld connector slow strain rate tension experiments are the NaCl solutions 3.5% Under environment, rate of extension is 9 × 10^-6mm^-1。

In following embodiment, 7N01 aluminium alloy sheet weld connector hardness tests position is Weld pipe mill.

In following embodiment, during alloy melting, in order to reduce aluminium alloy melt surface tension, contribute to bubble hydrogen certainly By escaping, in fusion process, after adding in Al-Mn intermediate alloys, coverture is added in bath surface, what following embodiment was selected Coverture is commercial No. two smelting agents, and coverture addition, which is subject to, can cover the minimum of entire reaction melt surface.

Embodiment 1

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：2.99%, Mg：5.45%, Mn：0.98%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, the Al-Mg-Zn-Mn aluminium alloy welding wires A diameter of 1.2mm.

A kind of preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires, includes the following steps：

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 750 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 730 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 710 DEG C；

(2) prepared by ingot casting：Al-Mg-Zn-Mn aluminium alloy cast ingots are prepared by direct water-cooling semi-continuous casting, it is a diameter of 90mm；

(3) pretreatment and hot extrusion：Al-Mg-Zn-Mn aluminium alloy cast ingots are heated to 400 DEG C, are directly heated up after keeping the temperature 2h Hot extrusion is carried out after to 440 DEG C of heat preservation 2h, extrusion ratio 12 obtains a diameter of aluminium alloy extruded line bars of 8mm Al-Mg-Zn-Mn；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 550 DEG C, after keeping the temperature 2h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 80.86%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 440 DEG C, heat preservation 1h furnace coolings obtain annealed state welding wire line base；

(6) bright cold-drawn：Annealed state welding wire line base is first stripped off the skin by flaying machine to a diameter of 3.2mm, it then will be a diameter of The line base of 3.2mm is drawn into finished product welding wire through 7 passages, every time drawing parameter is as follows：3.2mm→2.8mm→2.4mm→ 2.0mm → 1.6mm → 1.4mm → 1.27mm → 1.2mm, cleaning welding wire and take-up obtain Al-Mg-Zn-Mn aluminum alloy weldings into disk Silk；

It is welded, is as follows with Al-Mg-Zn-Mn aluminium alloy welding wires manufactured in the present embodiment：

(1) welding fabrication：Using the 7N01 aluminum alloy plate materials of 4mm thickness as base material bevel, used after polishing cleaning groove Al-Mg-Zn-Mn aluminium alloy welding wires made from the present embodiment are welded 7N01 aluminum alloy plate materials, are obtained by MIG welding procedures 7N01 aluminium alloy sheet weld connectors；

(2) property of welded joint is tested：It will use made from Al-Mg-Zn-Mn aluminium alloy welding wires manufactured in the present embodiment The smooth sample of 7N01 aluminium alloy sheet weld connectors stretched, is bent and slow strain rate tension experiment, to weld seam central metal into Row hardness test, related performance indicators data are as shown in table 1.7N01 aluminium alloy sheet welds connector is curved made from the present embodiment Qu Xingneng is with being respectively adopted commercial 5356 aluminium alloy welding wires (comparative example 1) and novel aluminum alloy Al-4.92Mg-1.50Mn welding wires (comparative example 2) is identical by the bending property of the welding point of 7N01 aluminum alloy plate materials that identical MIG welding procedures are welded.

Comparative example 1

Using 5356 aluminium alloy welding wire of commercialization of a diameter of 1.2mm use in embodiment 1 using manufactured in the present embodiment The identical MIG welding procedures welding 7N01 aluminum alloy plate materials of Al-Mg-Zn-Mn aluminium alloy welding wires, include the following steps：

(1) welding fabrication：Using the 7N01 planks of 4mm thickness as base material bevel, using commercialization after polishing cleaning groove 5356 aluminium alloy welding wire MIG welding procedures weld 7N01 planks, obtain 7N01 aluminium alloy sheet weld connectors；

(2) property of welded joint is tested：The smooth sample of 7N01 aluminium alloy sheet welds connector made from comparative example is natural Timeliness stretched after 36 days, is bent and slow strained tensile experiment, and hardness test is carried out to Weld pipe mill.

The smooth sample of 7N01 aluminium alloy sheet welds connector made from comparative example 1 is stretched, is bent and strained slowly drawing Experiment is stretched, hardness test is carried out to Weld pipe mill, related performance indicators data are as shown in table 1, and 7N01 aluminium made from comparative example 1 closes The bending property of golden plate material welding point is qualified.

Comparative example 2

A kind of preparation method of Al-4.92Mg-1.50Mn aluminium alloy welding wires, includes the following steps：

(1) prepared by ingot casting：Al-4.92Mg-1.5Mn aluminium alloy cast ingots, diameter are prepared by direct water-cooling semi-continuous casting For 110mm, ingot chemistry is：Mg：4.92%, Mn：1.50%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity element total amount≤0.15%, single impurity content≤0.05%, surplus Al；

(2) homogenizing cast ingot：Ingot casting is placed, 495 DEG C are heated in cyclone furnace, heat preservation is for 24 hours；

(3) hot extrusion：Aluminium alloy cast ingot is heated to 460 DEG C, carries out hot extrusion after keeping the temperature 2h, extrusion ratio 30 obtains The aluminium alloy extruded line bars of Al-4.92Mg-1.50Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-4.92Mg-1.50Mn are heated to 450 DEG C, after keeping the temperature 2h, directly through 5 Passage rolls into the Al-4.92Mg-1.50Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

(5) intermediate annealing：Al-4.92Mg-1.50Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 440 DEG C, 1h furnace coolings are kept the temperature, obtain annealed state welding wire line base；

(6) bright cold-drawn：Annealed state welding wire line base is first stripped off the skin by flaying machine to a diameter of 3.2mm, it then will be a diameter of The line base of 3.2mm is drawn into finished product welding wire through 7 passages, every time drawing parameter is as follows：3.2mm→2.8mm→2.4mm→ 2.0mm → 1.6mm → 1.4mm → 1.27mm → 1.2mm, cleaning welding wire and take-up obtain Al-4.92Mg-1.50Mn aluminium into disk Alloy welding wire；

It is welded, is as follows with Al-4.92Mg-1.50Mn aluminium alloy welding wires prepared by this comparative example：

(1) welding fabrication：Using the 7N01 aluminum alloy plate materials of 4mm thickness as base material bevel, used after polishing cleaning groove Al-4.92Mg-1.50Mn aluminium alloy welding wires made from this comparative example are welded 7N01 aluminum alloy plate materials, are obtained by MIG welding procedures Obtain 7N01 aluminium alloy sheet weld connectors；

(2) property of welded joint is tested：The Al-4.92Mg-1.50Mn aluminium alloy welding wires of example preparation will be applied using this comparison The smooth sample of 7N01 aluminium alloy sheet welds connector obtained stretched, is bent and slow strain rate tension experiment, to Weld pipe mill Metal carries out hardness test.The smooth sample of 7N01 aluminium alloy sheet welds connector made from comparative example 2 is stretched, be bent and Slow strain rate tension experiment carries out hardness test to Weld pipe mill, and related performance indicators data are as shown in table 1, made from comparative example 2 The bending property of 7N01 aluminium alloy sheet weld connectors is qualified.

Embodiment 2

(1) alloy melting：By graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 755 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 725 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 715 DEG C；

(2) prepared by ingot casting：Al-Mg-Zn-Mn aluminium alloy cast ingots are prepared by direct water-cooling semi-continuous casting, it is a diameter of 100mm；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 350 DEG C, 470 DEG C of heat preservations are directly warming up to after keeping the temperature 3h Carry out hot extrusion after 3h, extrusion ratio 25 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 540 DEG C, after keeping the temperature 3h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 430 DEG C, heat preservation 2h furnace coolings obtain annealed state welding wire line base；

(6) bright cold-drawn：Annealed state welding wire line base is first stripped off the skin by flaying machine to a diameter of 3.2mm, it then will be a diameter of The line base of 3.2mm is drawn into finished product welding wire through 8 passages, every time drawing parameter is as follows：3.2mm→2.8mm→2.5mm→ 2.2mm → 1.9mm → 1.6mm → 1.4mm → 1.27mm → 1.2mm, cleaning welding wire and take-up obtain Al-Mg-Zn-Mn into disk Aluminium alloy welding wire；

Embodiment 3

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：1.91%, Mg：5.39%, Mn：1.01%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, the Al-Mg-Zn-Mn aluminium alloy welding wires A diameter of 1.2mm.

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting, when Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 760 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 720 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 725 DEG C；

(2) prepared by ingot casting：Al-Mg-Zn-Mn aluminium alloy cast ingots are prepared by direct water-cooling semi-continuous casting, it is a diameter of 110mm；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 300 DEG C, 450 DEG C of heat preservations are directly warming up to after keeping the temperature 4h Carry out hot extrusion after 3h, extrusion ratio 21 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 12mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 530 DEG C, after keeping the temperature 4h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 400 DEG C, heat preservation 1h furnace coolings obtain annealed state welding wire line base；

Embodiment 4

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：1.91%, Mg：5.39%, Mn：1.01%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire are a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 765 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 710 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 725 DEG C；

(2) prepared by ingot casting：Al-Mg-Zn-Mn aluminium alloy cast ingots are prepared by direct water-cooling semi-continuous casting, it is a diameter of 120mm；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 250 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 5h Carry out hot extrusion after 3h, extrusion ratio 18 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 14mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 520 DEG C, after keeping the temperature 3h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 93.75%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 420 DEG C, heat preservation 2h furnace coolings obtain annealed state welding wire line base；

Embodiment 5

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：1.03%, Mg：5.48%, Mn：0.95%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 770 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 715 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 730 DEG C；

(2) prepared by ingot casting：Al-Mg-Zn-Mn aluminium alloy cast ingots are prepared by direct water-cooling semi-continuous casting, it is a diameter of 130mm；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 200 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 6h Carry out hot extrusion after 2h, extrusion ratio 26 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 8mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 510 DEG C, after keeping the temperature 4h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 80.86%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 410 DEG C, heat preservation 1h furnace coolings obtain annealed state welding wire line base；

Embodiment 6

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 765 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 720 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 725 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 400 DEG C, 450 DEG C of heat preservations are directly warming up to after keeping the temperature 6h Carry out hot extrusion after 3h, extrusion ratio 20 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 500 DEG C, after keeping the temperature 2h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

Embodiment 7

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：2.80%, Mg：5.38%, Mn：0.58%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 760 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 725 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 720 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 350 DEG C, 470 DEG C of heat preservations are directly warming up to after keeping the temperature 5h Carry out hot extrusion after 2h, extrusion ratio 17 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 12mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 490 DEG C, after keeping the temperature 4h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 91.49%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 410 DEG C, heat preservation 2h furnace coolings obtain annealed state welding wire line base；

Embodiment 8

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 755 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 730 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 715 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 300 DEG C, 440 DEG C of heat preservations are directly warming up to after keeping the temperature 4h Carry out hot extrusion after 2h, extrusion ratio 15 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 14mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 480 DEG C, after keeping the temperature 4h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 93.75%；

Embodiment 9

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：1.76%, Mg：5.26%, Mn：0.45%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 750 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 710 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 710 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 250 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 3h Carry out hot extrusion after 2h, extrusion ratio 25 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 12mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 490 DEG C, after keeping the temperature 2h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 91.49%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 400 DEG C, heat preservation 2h furnace coolings obtain annealed state welding wire line base；

(6) bright cold-drawn：Annealed state welding wire line base is first stripped off the skin by flaying machine to a diameter of 3.2mm, it then will be a diameter of The line base of 3.2mm is drawn into finished product welding wire through 8 passages, every time drawing parameter is as follows：3.2mm→2.8mm→2.5mm→ 2.2mm → 1.9mm → 1.6mm → 1.4mm → 1.27mm → 1.2mm, simultaneously take-up into disk, obtains Al-Mg-Zn-Mn aluminium to cleaning welding wire Alloy welding wire；

Embodiment 10

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 755 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 715 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 730 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 200 DEG C, 450 DEG C of heat preservations are directly warming up to after keeping the temperature 2h Carry out hot extrusion after 4h, extrusion ratio 42 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 500 DEG C, after keeping the temperature 4h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

Embodiment 11

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：0.85%, Mg：5.30%, Mn：0.42%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 760 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 720 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 725 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 200 DEG C, 450 DEG C of heat preservations are directly warming up to after keeping the temperature 6h Carry out hot extrusion after 3h, extrusion ratio 12 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 8mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 510 DEG C, after keeping the temperature 3h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 80.86%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 420 DEG C, heat preservation 1h furnace coolings obtain annealed state welding wire line base；

Embodiment 12

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 765 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 725 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 720 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 250 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 5h Carry out hot extrusion after 2h, extrusion ratio 25 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 520 DEG C, after keeping the temperature 3h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

Embodiment 13

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：2.50%, Mg：4.98%, Mn：0.63%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 770 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 730 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 715 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 300 DEG C, 440 DEG C of heat preservations are directly warming up to after keeping the temperature 4h Carry out hot extrusion after 3h, extrusion ratio 21 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 12mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 530 DEG C, after keeping the temperature 2h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 91.49%；

(5) intermediate annealing：Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 430 DEG C, heat preservation 1h furnace coolings obtain annealed state welding wire line base；

Embodiment 14

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 750 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 725 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 710 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 350 DEG C, 470 DEG C of heat preservations are directly warming up to after keeping the temperature 5h Carry out hot extrusion after 4h, extrusion ratio 18 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 14mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 540 DEG C, after keeping the temperature 4h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 93.75%；

Embodiment 15

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：1.54%, Mg：5.01%, Mn：0.74%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 755 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 720 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 715 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 400 DEG C, 450 DEG C of heat preservations are directly warming up to after keeping the temperature 6h Carry out hot extrusion after 3h, extrusion ratio 26 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 8mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 550 DEG C, after keeping the temperature 4h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 80.86%；

It is welded, is as follows with Al-Mg-Zn-Mn aluminium alloy welding wires manufactured in the present embodiment：(1) it is welded into Type：Using the 7N01 aluminum alloy plate materials of 4mm thickness as base material bevel, Al- made from the present embodiment is used after polishing cleaning groove Mg-Zn-Mn aluminium alloy welding wires are welded 7N01 aluminum alloy plate materials, are obtained 7N01 aluminium alloy sheet welds and connect by MIG welding procedures Head；

Embodiment 16

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 760 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 715 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 720 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 400 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 2h Carry out hot extrusion after 2h, extrusion ratio 20 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 540 DEG C, after keeping the temperature 3h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

Embodiment 17

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：2.32%, Mg：4.58%, Mn：0.89%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 350 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 3h Carry out hot extrusion after 3h, extrusion ratio 17 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 12mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 530 DEG C, after keeping the temperature 3h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 91.49%；

Embodiment 18

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 770 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 730 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 730 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 300 DEG C, 450 DEG C of heat preservations are directly warming up to after keeping the temperature 4h Carry out hot extrusion after 3h, extrusion ratio 15 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 14mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 520 DEG C, after keeping the temperature 2h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 93.75%；

Embodiment 19

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：2.13%, Mg：4.75%, Mn：0.47%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 765 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 725 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 725 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 250 DEG C, 470 DEG C of heat preservations are directly warming up to after keeping the temperature 5h Carry out hot extrusion after 3h, extrusion ratio 22 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 8mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 510 DEG C, after keeping the temperature 4h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 80.86%；

Embodiment 20

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 760 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 720 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 720 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 200 DEG C, 440 DEG C of heat preservations are directly warming up to after keeping the temperature 6h Carry out hot extrusion after 4h, extrusion ratio 42 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 500 DEG C, after keeping the temperature 4h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

Embodiment 21

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：1.25%, Mg：4.52%, Mn：0.59%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 755 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 715 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 715 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 200 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 2h Carry out hot extrusion after 3h, extrusion ratio 14 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 12mm；

Embodiment 22

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 750 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 710 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 715 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 250 DEG C, 450 DEG C of heat preservations are directly warming up to after keeping the temperature 3h Carry out hot extrusion after 2h, extrusion ratio 13 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 14mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 480 DEG C, after keeping the temperature 4h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 93.75%；

Embodiment 23

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：0.51%, Mg：4.76%, Mn：0.81%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 755 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 715 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 720 DEG C；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 490 DEG C, after keeping the temperature 3h, are directly rolled through 6 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 93.75%；

(2) property of welded joint is tested：It will use made from Al-Mg-Zn-Mn aluminium alloy welding wires manufactured in the present embodiment The smooth sample of 7N01 aluminium alloy sheet weld connectors stretched, is bent and slow strain rate tension experiment, to weld seam central metal into Row hardness test.Related performance indicators data are as shown in table 1.7N01 aluminium alloy sheet welds connector is curved made from the present embodiment Qu Xingneng is with being respectively adopted commercial 5356 aluminium alloy welding wires (comparative example 1) and novel aluminum alloy Al-4.92Mg-1.50Mn welding wires (comparative example 2) is identical by the bending property of the welding point of 7N01 aluminum alloy plate materials that identical MIG welding procedures are welded.

Embodiment 24

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 350 DEG C, 460 DEG C of heat preservations are directly warming up to after keeping the temperature 5h Carry out hot extrusion after 2h, extrusion ratio 25 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 12mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 500 DEG C, after keeping the temperature 4h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 91.49%；

Embodiment 25

A kind of Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient and its mass percent contained are respectively：Zn：0.72%, Mg：4.53%, Mn：0.58%, Ti≤0.15%, Cr≤0.15%, Fe≤0.25%, Si≤0.25%, other impurity elements Total amount≤0.15%, single impurity content≤0.05%, surplus Al, Al-Mg-Zn-Mn aluminium alloy welding wire it is a diameter of 1.2mm。

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 765 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 725 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 730 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 400 DEG C, 440 DEG C of heat preservations are directly warming up to after keeping the temperature 6h Carry out hot extrusion after 3h, extrusion ratio 30 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 10mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 480 DEG C, after keeping the temperature 3h, are directly rolled through 4 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm, deflection 87.75%；

Embodiment 26

(1) alloy melting：Using graphite-clay crucible, the melting in resistance furnace, is firstly added commercial-purity aluminium, treats aluminium fritting Industrial-purity zinc is added in when melting；When Al+Zn all melts, melt temperature adds few up to addition Al-Mn intermediate alloys at 770 DEG C Coverture is measured, when intermediate alloy whole fusing stirring melt, pure magnesium is added in when melt temperature reaches 730 DEG C, and fully Stirring；Then slag making, refinery by de-gassing have a power failure, and stand melt；Tapping casting when melt temperature is 725 DEG C；

(3) pretreatment and hot extrusion：Aluminium alloy cast ingot is heated to 300 DEG C, 470 DEG C of heat preservations are directly warming up to after keeping the temperature 4h Carry out hot extrusion after 4h, extrusion ratio 13 obtains the aluminium alloy extruded line bars of Al-Mg-Zn-Mn of a diameter of 8mm；

(4) it rolls：The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 490 DEG C, after keeping the temperature 2h, are directly rolled through 5 passages Into the Al-Mg-Zn-Mn aluminium alloy wire bases of a diameter of 3.5mm；

1 embodiment of table and comparative example welding point Weld pipe mill hardness number, tensile property and anticorrosion stress-resistant performance

By table 1 as it can be seen that welding 7N01 aluminium alloy plates by 5356 aluminium alloy welding wire MIG prepared by conventional method with comparative example 1 Al-4.92Mg-1.50Mn aluminium alloy welding wires MIG welding 7N01 aluminum alloy plate materials prepared by the welding point and conventional method of material The mechanical performance index and corrosion resistance of welding point are compared, the Al-Mg-Zn-Mn aluminum alloy weldings prepared using present invention process The mechanical property and corrosion resistance of the welding point of silk MIG welding 7N01 aluminum alloy plate materials all significantly improve.This is fully embodied The value of the present invention.

Claims

1. a kind of Al-Mg-Zn-Mn aluminium alloy welding wires, which is characterized in that the Al-Mg-Zn-Mn aluminium alloy welding wires, the ingredient contained And its mass percent is respectively：Zn：0.5~3.0%, Mg：4.5~5.5%, Mn：0.4~1.0%, Ti≤0.15%, Cr ≤ 0.15%, Fe≤0.25%, Si≤0.25%, other impurity element total amount≤0.15%, single impurity content≤ 0.05%, surplus Al；A diameter of 1.2mm of the Al-Mg-Zn-Mn aluminium alloy welding wires.

2. the preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires described in claim 1, which is characterized in that include the following steps：

(1) alloy melting

In resistance furnace, commercial-purity aluminium is first added in, industrial-purity zinc is added in when Al semi-moltens, when Al+Zn all fusings, meanwhile, When Al+Zn melt temperatures reach 750 DEG C~770 DEG C, Al-Mn intermediate alloys are added in, when intermediate alloy all melts, stirring is molten Body when Al+Zn+Mn melt temperatures reach 710 DEG C~730 DEG C, adds in pure magnesium, is sufficiently stirred；Then slag making, degasification essence Refining has a power failure, and stands melt；Tapping casting when melt temperature is 710 DEG C~730 DEG C；

(2) prepared by ingot casting

(3) pretreatment and hot extrusion

Al-Mg-Zn-Mn aluminium alloy cast ingots obtained are heated to 200 DEG C~400 DEG C, after keeping the temperature 2h~6h, are directly warming up to Hot extrusion is carried out after 440 DEG C~470 DEG C heat preservation 2h~4h, extrusion ratio is 10~50, obtains Al-Mg-Zn-Mn aluminum alloy extrusion lines Bar；

(4) it rolls

The aluminium alloy extruded line bars of Al-Mg-Zn-Mn are heated to 480 DEG C~550 DEG C, are rolled after keeping the temperature 2h~4h, are obtained straight Diameter is the Al-Mg-Zn-Mn aluminium alloy wire bases of 3.5mm；Wherein, rolling total deformation is 80%~94%；

(5) intermediate annealing

Al-Mg-Zn-Mn aluminium alloy wires base is subjected to intermediate annealing, annealing temperature is 400 DEG C~440 DEG C, keeps the temperature 1h~2h, with Furnace cooling but, obtains the annealed state welding wire line base of a diameter of 3.5mm；

(6) bright cold-drawn

The annealed state welding wire line base of a diameter of 3.5mm is once stripped off the skin, the annealed state welding wire line base after stripping off the skin is carried out more Passage drawing, simultaneously take-up into disk, obtains the Al-Mg-Zn-Mn aluminium alloy welding wires of a diameter of 1.2mm to cleaning welding wire.

3. the preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires as claimed in claim 2, which is characterized in that the step (1) in, the alloy melting is carried out using graphite-clay crucible in resistance furnace.

4. the preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires as claimed in claim 2, which is characterized in that the step (2) in, a diameter of 90~130mm of the Al-Mg-Zn-Mn aluminium alloy cast ingots.

5. the preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires as claimed in claim 2, which is characterized in that the step (3) in, a diameter of 8~14mm of the aluminium alloy extruded line bars of the Al-Mg-Zn-Mn.

6. the preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires as claimed in claim 2, which is characterized in that the step (4) in, the rolling carries out 4~6 passes.

7. the preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires as claimed in claim 2, which is characterized in that the step (6) in, the drawing carries out 7~8 passage drawings, and passage drawing elongation percentage is 1.1~1.6.

8. the preparation method of Al-Mg-Zn-Mn aluminium alloy welding wires as claimed in claim 2, which is characterized in that the step (6) in, the drawing process of aluminium alloy welding wire is bright-drawing, and a diameter of 3.5mm annealed states welding wire line base is first taken off by flaying machine Skin to diameter 3.2mm annealed state welding wire line bases.