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CN103567625A - Method for welding aluminum alloy part and aluminum alloy plate manufactured with method - Google Patents

Method for welding aluminum alloy part and aluminum alloy plate manufactured with method Download PDF

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Publication number
CN103567625A
CN103567625A CN201210410346.XA CN201210410346A CN103567625A CN 103567625 A CN103567625 A CN 103567625A CN 201210410346 A CN201210410346 A CN 201210410346A CN 103567625 A CN103567625 A CN 103567625A
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Prior art keywords
welding
aluminium alloy
phase particles
coating
aluminum alloy
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CN201210410346.XA
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Chinese (zh)
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CN103567625B (en
Inventor
福田敏彦
小关好和
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Sumitomo Light Metal Industries Ltd
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Sumitomo Light Metal Industries Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
    • B23K20/2336—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer both layers being aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
    • F16S1/00—Sheets, panels, or other members of similar proportions; Constructions comprising assemblies of such members
    • F16S1/02—Sheets, panels, or other members of similar proportions; Constructions comprising assemblies of such members designated for being secured together edge to edge, e.g. at an angle; Assemblies thereof
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B23K2101/185—Tailored blanks
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Arc Welding In General (AREA)

Abstract

The invention discloses a method for welding an aluminum alloy part and an aluminum alloy plate manufactured with the method. The method solves the hue difference problem in a coating provided by anodizing on the surface of an integrally formed aluminum alloy part, and the difference occurs between a part corresponding to a welding area and other parts corresponding to a non-welding area. A coverage part (2) and a side part (3) are both made of a 5000-series alloy, the particle size of a second-phase particle is not greater than 5 [mu]m, the distribution density v of the second-phase particle is smaller than or equal to 10000 (particle/mm<2>), and the end parts of the parts are subjected to friction stirring welding by a welded joint part (5) under the following conditions: the diameter d of a shoulder part (10) of a tool (8) is greater than or equal to 3 but smaller than or equal to 8 (mm), and the number of revolutions r of a tool (7) is greater than 6 but smaller than or equal to 20 (r/mm), i.e. the number of revolutions of the tool with the welding length being every 1mm. The distribution of second-phase particles in a welding area and second-phase particles in other areas is basically balanced by the welding method, and hue difference is prevented from being formed in an anodizing coating formed on the surface of a part.

Description

For the method for welding aluminum alloy parts with by the aluminium alloy plate of its manufacture
Technical field
The present invention relates to a kind of for the method for welding aluminum alloy parts and the aluminium alloy plate of being manufactured by the method.Especially, the present invention relates to a kind of aluminium alloy plate, after welding, on this aluminium alloy plate, by anodic oxidation, form coating.
Background technology
Coating member by the production of the aluminium alloy plate of partial fixing in, due to design feature, it is difficult to form and the integrated coating member of support member conventionally.Due to this reason, by for example melting welding or laser weld, the support member of making by aluminium alloy and coating member are welded as a whole.Comprise the sidepiece forming as one of its welding region and coating member will stand flush cut so that its smooth surface.Then, by anodic oxidation, on the smooth surface of these parts, form coating, corrosion resistance and wearability are improved.
In the anodized coating forming, in the part corresponding to welding region with between corresponding to the other parts of welding region not, can produce tone difference on the sidepiece forming as one of making by aluminium alloy and coating member surface.This tone difference may occur in second phase particles in welding region and change when forming solid solution and becoming coarse by the heat by generations such as melting welding, thus, the distribution density of second phase particles, in the part corresponding to welding region and obviously different corresponding to the other parts of welding region not, causes antianode coating to produce adverse influence.
In order to prevent in anodic coating because second phase particles changes the form of solid solution in welding process or become the coarse tone difference that produces, propose to use agitating friction welding, when aluminium alloy sidepiece and coating member are when soldered, it can minimize (referring to Japanese Patent Application Publication 2000-248399) by any heat affected area on welding region.
Yet, even if carry out the welding region that agitating friction welding forms aluminium alloy covering and support member, in the anodic coating forming, between the part corresponding to welding region and the other parts corresponding to welding region not, still may produce tone difference on the surface of the sidepiece forming as one and coating member.The generation of tone difference is because in stir friction welding process, due to stirring, second phase particles in sidepiece and coating member splits into more small particle at welding region, thus, in the distribution of second phase particles, at welding region with do not produce difference between welding region, cause the distribution density of second phase particles between these zoness of different to have obvious difference.
Summary of the invention
Therefore, the object of the invention is to overcome in weld the lip-deep coating being formed by anodic oxidation of the aluminium alloy part forming as one by agitating friction the problem of the tone difference producing between the part corresponding to welding region and the other parts corresponding to welding region not.
According to the present invention, when forming aluminium alloy plate by aluminium alloy part is welded as a whole, the Density Distribution of the second phase particles in aluminium alloy part is carried out restriction, and is limited with the condition of welding aluminum alloy parts carrying out agitating friction welding.As a result of, in the anodic coating that has prevented from forming on plate surface corresponding to the part of welding region with corresponding to the tone difference between the other parts of welding region not.
A first aspect of the present invention is a kind of method for welding aluminum alloy parts, wherein, soldered aluminium alloy part is made by 5000 series alloys that comprise second phase particles each other, and the particle diameter of this second phase particles is not more than 5 μ m, and distribution density v meets 10,000>=v (particle/mm 2); The method comprises: by aluminium alloy part end is obtained to junction surface to obtaining, and form welding region by junction surface being carried out to agitating friction welding, thereby aluminium alloy part is welded as a whole, wherein, friction stir welding carries out under the following conditions: the diameter d of instrument shoulder is the scope of (mm) in 3≤d≤8, and the revolution r of instrument is in the scope (turning/mm (revolution of every 1mm weld length)) of 6 < r≤20.
Because soldered each other aluminium alloy part is all 5000 series alloys that comprise second phase particles, the particle diameter of this second phase particles is not more than 5 μ m, and distribution density v meets 10,000>=v (particle/mm 2), in the whipping process of agitating friction welding, the division of second phase particles can be minimized.
Another advantage of the present invention is, because aluminium alloy part is carried out to agitating friction welding under the following conditions: the diameter d of instrument shoulder is the scope of (mm) in 3≤d≤8, and in stir friction welding process, the revolution r of instrument is in 6 < r≤20 (scope of turn/mm), and the heat input in welding process is optimised.As a result of, soldered parts can be welded reliably, and separating out of small second phase particles can be minimized.
Therefore the distribution that, has prevented aluminium alloy part second phase particles between welding region and any other region of being welded as a whole produces obvious difference.
Therefore, before being provided as final products, while forming anodized coating on the aluminium alloy part surface forming as one, between welding region and other region, in anodized coating, the distribution of second phase particles does not produce notable difference, has prevented that anodized coating is in the part corresponding to welding region with corresponding to the not generation of the other parts tone difference of welding region.
In the situation that the particle diameter of the second phase particles in the aluminium alloy part being welded to one another is greater than 5 μ m, in stir friction welding process, due to stirring, second phase particles probably divides at welding region, between welding region and other region, the distribution of second phase particles can produce obvious difference, causes the tone difference between these different regions.Therefore, the particle diameter of the second phase particles in aluminium alloy part is preferably not more than 5 μ m.
When welding by agitating friction when aluminium alloy part is welded, if tool using shoulder diameter d is less than the instrument of 3mm, can not stir in enough regions.As a result of, owing to having to obtain enough large welding region, can not weld well aluminium alloy part.When diameter d is greater than 8mm, welding region is unnecessarily expanded, and has expanded the wherein region of second phase particles division.As a result of, at anodized coating, probably produce tone difference.Therefore, the diameter d of instrument shoulder in 3≤d≤8 scope of (mm).
The in the situation that in stir friction welding process, instrument revolution r (turning/mm) being not more than 6, heat input is sufficient not and easily suck bubble.As a result of, do not form well welding region.In the situation that revolution surpasses 20 (turning/mm), heat input becomes excessive, and the grainiess of any part through stirring becomes thicker than the grainiess of base material, has increased the possibility that tone difference occurs.Therefore, in stir friction welding process, the revolution r of instrument is preferably in the scope of 6 < r≤20 (turning/mm), the scope (turning/mm) more preferably in 10≤r≤20.
" r " is the revolution of every 1mm weld length instrument, and it can obtain divided by speed of welding B (mm/min.) by revolutions per minute A (rpm).
Instrument direction of rotation is set as with respect to the direction of welding, be in anticlockwise situation, with respect to the direction of welding, the structure of weld seam trend changes in its right end portion, has increased the possibility that leaves striped after anodic oxidation.Therefore, when as shown in figs. 1 and 2, while welding to be positioned at the marginal portion of the parts of right-hand side, preferably the direction of rotation of instrument is set as with respect to the direction of welding as counterclockwise, make the right end portion of weld seam be positioned at parts marginal portion near, it is not obvious that striped advantageously becomes.
Second aspect of the present invention is a kind of aluminium alloy plate, it comprises: the coating member of being made by tabular aluminium alloy part and support member, and the welding region that wherein coating member and support member are welded as one forms by agitating friction welding is carried out in junction surface, this junction surface is by obtaining coating member and the docking of support member end, with by anodic oxidation at coating member, the coating that support member and welding region surface form, wherein coating member and support member are made by 5000 series alloys that comprise second phase particles, the particle diameter of this second phase particles is not more than 5 μ m, and distribution density v meets 10, 000>=v (particle/mm 2), wherein, agitating friction is welded on and under following condition, carries out forming welding region: the diameter d of instrument shoulder is the scope of (mm) in 3≤d≤8, and the revolution r of instrument is in the scope (turning/mm) of 6 < r≤20.
Preferably the thickness t of coating member and support member is respectively 1≤t≤3 (mm).
In the situation that the thickness of coating member and support member is less than respectively 1mm, by agitating friction, welds the housing that assembling parts obtains and may not there is the enough rigidity as housing.In the situation that the thickness of coating member and support member is greater than respectively 3mm, although housing meets the desired rigidity, increased weight, be difficult to realize to use the lightweight of one of the advantage of aluminum.
The thickness of mentioning is in this manual to practice midwifery any convex-concave surface of raw weld seam to obtain the thickness obtaining after the flush cut of smooth surface by removing by friction stir welding, or after flush cut by the thickness after sand paper polishing (paper polish), Surface Finishing such as polishing (buffing) etc., neither carrying out flush cut, also do not carry out in the situation of Surface Finishing, thickness described in this description refers to the thickness through the state of rolling.
As mentioned above, second phase particles is almost distributed in welding region and other region that is welded to one another the coating member that is integrated and support member fifty-fifty.Therefore,, in the anodized coating that has prevented from forming, in the part corresponding to welding region with corresponding to the other parts of welding region not, there is any tone difference on the surface of integrated coating member and support member.
According to the method for welding aluminum alloy parts of the present invention, second phase particles in the welding region of aluminium alloy part is difficult to division, by the distribution density of the second phase particles in aluminium alloy part and apply restriction to carrying out the condition of agitating friction welding, make the distribution of the second phase particles in welding region and other region substantially average.Therefore, the lip-deep anodized coating of aluminium alloy plate manufacturing by the method for welding aluminum alloy parts according to the present invention does not have tone difference between the part corresponding to welding region and other parts.As a result of, greatly improved the product quality of plate.
Accompanying drawing explanation
Fig. 1 is by the amplification stereogram of the main structural components of the aluminium alloy plate of the acquisition of the method for welding aluminum alloy parts according to the present invention;
Fig. 2 is the schematic diagram illustrating according to the method for welding aluminum alloy parts of the present invention; With
Fig. 3 is by the sectional view of the amplification of the main structural components of the welding region of the coating member being welded as a whole for the method for welding aluminum alloy parts according to the present invention and support member.
The specific embodiment
The object that the present invention realizes is that the distribution density by the second phase particles in aluminium alloy part limits, and limit carrying out the condition of agitating friction welding, avoid in the anodized coating on aluminium alloy part surface, between the part corresponding to welding region and the other parts corresponding to last welding region, produce tone difference.
Embodiment
Beneficial effect of the present invention is as described below to be confirmed.
With reference to the reference number exemplifying in Fig. 1, the 1st, the aluminium alloy plate obtaining by the method for welding aluminum alloy parts according to the present invention, the 2nd, there is the aluminium alloy coating member of 2mm thickness, the 3rd, there are the aluminium alloy sidepiece parts of 2mm thickness, the 4th, the welding region in the junction surface 5 when aluminium alloy coating member 2 and 3 welding of aluminium alloy sidepiece parts.After flush cut, by anodic oxidation, on the surface of the aluminium alloy coating member 2 forming as one and aluminium alloy sidepiece parts 3, form anodized coating 6.
Table 1 represents the chemical composition in the embodiment of the present invention.There are three kinds of alloys, alloy 1, alloy 2 and 5052 alloys.Make in the present embodiment three kinds of aluminium alloy plates.The coating member 2 of each plate is used identical alloy preparation with support member 3.Alloy 1 is 5000 series alloys that comprise second phase particles, and the particle that this second phase particles is not more than 5 μ m by particle diameter forms, and distribution density is 3,670 particles/mm 2.Alloy 2 is 5000 series alloys that comprise second phase particles, and the particle that this second phase particles is not more than 5 μ m by particle diameter forms, and distribution density is 8,210 particles/mm 2.5052 alloys are 5000 series alloys that comprise second phase particles, and the particle that this second phase particles is not more than 5 μ m by particle diameter forms, and distribution density is 11,360 particles/mm 2.
The distribution density of second phase particles obtains under the following conditions:
By sand paper polishing and polishing, except scalping 0.5mm, then with 5% hydrofluoric acid, new surface is corroded.Subsequently, by light microscope, the surface obtaining is amplified to 400 times, with 1 μ m unit, by graphical analysis, measure every 1mm 2the diameter distributing is not more than the number of particles of 5 μ m.
(table 1) (quality %)
Material Silicon Iron Copper Manganese Magnesium Chromium Zinc Titanium Aluminium
Alloy 1 0.05 0.08 0.05 0.00 3.06 0.01 0.00 0.00 Surplus
Alloy 2 0.08 0.17 0.02 0.00 3.45 0.01 0.00 0.00 Surplus
5052 alloys 0.10 0.31 0.02 0.01 2.37 0.18 0.01 0.01 Surplus
In order to obtain the tabular aluminium alloy part of being made by above-mentioned three kinds of alloys, by semi-continuous casting, prepare ingot casting.Then, homogenize, hot rolling and cold rolling to obtain the plate of 2.5mm thickness.Then, plate is annealed into O-state (completely softening).Prepare two 250mm wide * the long plate of 250mm be used separately as coating member and support member.
As shown in Figure 2, by docking separately from each other by coating member 2 and the support member 3 of using the alloy of same type to prepare, according to the method for welding aluminum alloy parts of the present invention, be welded as a whole, obtained thus three aluminium alloy plates.That is to say, coating member 2 and support member 3 are contacted with each other and form junction surface 5.When supporter 7 is contacted with junction surface 5 from rear side, under the state stirring by shoulder 10, the mixing needle of throw 89 is inserted in junction surface 5, coating member 2 and support member 3 are welded.The diameter d of the shoulder 10 of instrument 8 is 7 (mm), and the diameter of the mixing needle 9 of instrument 8 is 3 (mm), and instrument revolution per minute is 2700 (rpm), and speed of welding is 150 (mm/min.), makes revolution r be calculated as 18 (turning/mm).After welding completes, by Milling Machine, coating member 2 is carried out to flush cut, remove the 0.5mm of its superficial layer, until the uneven disappearance on any surface.Then, by sand paper polishing and polishing, make the new surfacing of coating member 2, and use sulfuric acid to form anodized coating 6 on this new surface, make this anodized coating there is the thickness (referring to Fig. 2) of 10 μ m.
For reference; in description, also described another result of the test; wherein by laser weld and metal-arc inert-gas welding(MIG welding), meet (MIG welding) respectively; the coating member of being prepared by the alloy of aforesaid three types 2 and support member 3 are welded as a whole, and form anodized coating (referring to table 2).
Use as a comparative example 5052 alloys, no matter solder technology is agitating friction welding, laser weld or melting welding, in anodized coating 6, corresponding to the part of welding region 4, all occurred the tone difference of striated.On the other hand, in the situation that using alloy 1 and 2, in the anodized coating 6 forming on aluminium alloy plate 1 surface, in the part corresponding to using the welding region 4 of agitating friction welding, do not have the tone difference of striated to occur.
(table 2)
Zero: there is no candy strip
*: there is candy strip
In addition, to by being all to use the coating member 2 of alloy 2 preparations contain chemical composition as shown in table 1 and the aluminium alloy part that support member 3 forms, in the situation that to the shoulder diameter of instrument with revolution is as shown in table 3 does various conversion and carry out agitating friction welding.After welding, by Milling Machine, coating member 2 is carried out to flush cut, remove the 0.5mm of its superficial layer, by sand paper polishing and polishing, make the surface smoothing obtaining, then, use sulfuric acid on this surface, to form anodized coating 6, make this anodized coating there is the thickness of 10 μ m, and be confirmed whether to form the tone difference of striated.
Table 3 shows test results.In embodiment 1 to 5, there is no the tone difference of striated, wherein the shoulder diameter of instrument and revolution are within the scope of the invention.On the other hand, at shoulder diameter or the revolution of instrument, over (referring to comparative example 2 and 4) in any one example of the scope of the invention upper limit, all observe striated pattern.In example at shoulder diameter lower than lower limit of the present invention (referring to comparative example 1), welding is incomplete, the part that some are not welded.In example at the revolution of instrument lower than lower limit of the present invention (referring to comparative example 3), at welding portion, produce cavity.
(table 3)
Figure BSA00000794392600071
Industrial applicibility
The present invention is applicable to the product of being made by a plurality of aluminium alloy parts, after described a plurality of aluminium alloy parts are welded as a whole, forms in the above anodized coating.

Claims (3)

1. for a method for welding aluminum alloy parts, wherein, soldered aluminium alloy part is made by 5000 series alloys that comprise second phase particles each other, and the particle diameter of this second phase particles is not more than 5 μ m, and distribution density v meets 10,000>=v (particle/mm 2); The method comprises:
By portion is closed to obtaining welding in aluminium alloy part end, and
By junction surface being carried out to agitating friction welding, form welding region, thereby aluminium alloy part is welded as a whole, wherein
Agitating friction is welded under following condition and carries out: the diameter d of instrument shoulder is the scope of (mm) in 3≤d≤8, and the revolution r of instrument is in the scope (turning/mm (revolution of every 1mm weld length)) of 6 < r≤20.
2. an aluminium alloy plate, it comprises:
The coating member of being made by tabular aluminium alloy part and support member, and
The welding region that wherein coating member and support member are welded as one forms by agitating friction welding is carried out in junction surface, and this junction surface is by coating member and the docking of support member end are obtained, and
The coating forming on coating member, support member and welding region surface by anodic oxidation, wherein coating member and support member are made by 5000 series alloys that comprise second phase particles, the particle diameter of this second phase particles is not more than 5 μ m, and distribution density v meets 10,000>=v (particle/mm 2); And wherein
Agitating friction is welded on and under following condition, carries out forming welding region: the diameter d of instrument shoulder is the scope of (mm) in 3≤d≤8, and the revolution r of instrument is in the scope (turning/mm) of 6 < r≤20.
3. aluminium alloy plate claimed in claim 2, wherein the thickness of coating member and support member is respectively 1≤t≤3 (mm).
CN201210410346.XA 2012-07-19 2012-07-19 Method for welding aluminum alloy part and aluminum alloy plate manufactured with method Active CN103567625B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH115180A (en) * 1997-06-12 1999-01-12 Hitachi Ltd Welded structure
JP3333496B2 (en) * 2000-09-14 2002-10-15 株式会社日立製作所 Friction welding method and friction welding device
JP2003225780A (en) * 2002-01-30 2003-08-12 Nippon Light Metal Co Ltd Aluminum structure and method of manufacturing the same
CN100363142C (en) * 2005-10-11 2008-01-23 哈尔滨工业大学 Method for Preventing Abnormal Grain Growth of Aluminum Alloy Friction Stir Welding in Heat Treatment
JP2009107006A (en) * 2007-10-31 2009-05-21 Univ Nihon Protrusion formation by friction welding
JP2011025275A (en) * 2009-07-24 2011-02-10 Sumitomo Light Metal Ind Ltd Method for joining aluminum alloy material and aluminum alloy panel manufactured by the method for joining the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH115180A (en) * 1997-06-12 1999-01-12 Hitachi Ltd Welded structure
JP3333496B2 (en) * 2000-09-14 2002-10-15 株式会社日立製作所 Friction welding method and friction welding device
JP2003225780A (en) * 2002-01-30 2003-08-12 Nippon Light Metal Co Ltd Aluminum structure and method of manufacturing the same
CN100363142C (en) * 2005-10-11 2008-01-23 哈尔滨工业大学 Method for Preventing Abnormal Grain Growth of Aluminum Alloy Friction Stir Welding in Heat Treatment
JP2009107006A (en) * 2007-10-31 2009-05-21 Univ Nihon Protrusion formation by friction welding
JP2011025275A (en) * 2009-07-24 2011-02-10 Sumitomo Light Metal Ind Ltd Method for joining aluminum alloy material and aluminum alloy panel manufactured by the method for joining the same

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