JPH11285862A - Aluminum structural body excellent in surface treatment property, and its manufacture - Google Patents
Aluminum structural body excellent in surface treatment property, and its manufactureInfo
- Publication number
- JPH11285862A JPH11285862A JP9119998A JP9119998A JPH11285862A JP H11285862 A JPH11285862 A JP H11285862A JP 9119998 A JP9119998 A JP 9119998A JP 9119998 A JP9119998 A JP 9119998A JP H11285862 A JPH11285862 A JP H11285862A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- welding
- friction stir
- rmax
- joined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
- B23K20/122—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 using a non-consumable tool, e.g. friction stir welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、接合強度が要求さ
れる建築・土木用構造体、車両用構造体、船舶用構造体
等は勿論接合強度がそれほど要求されない一般構造体と
しても用いられ、アルミニウム及び／又はアルミニウム
合金（以下アルミニウム系と称する）部材を接合してな
る表面処理性に優れるアルミニウム系構造体およびその
製造方法に関する。The present invention can be used not only as a structure for construction and civil engineering, a structure for a vehicle, a structure for a ship, etc. where a joint strength is required, but also as a general structure where a joint strength is not so required. The present invention relates to an aluminum-based structure formed by joining aluminum and / or aluminum alloy (hereinafter referred to as aluminum-based) members and having excellent surface treatment properties, and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、アルミニウム系の建築・土木用構
造体、車両用構造体、船舶用構造体等は、以下のように
形成されていた。 （１）予め塗装、アルマイト処理、またはヘアライン加
工等の表面処理の済んだアルミニウム系部材同士をボル
ト接合等の機械的結合方法を用いて接合する。 （２）ＴＩＧ溶接およびＭＩＧ溶接でアルミニウム系部
材を溶接したときは、溶接ビードを切削・研削等により
削除したのちに、塗装処理する。 （３）アルマイト処理される部材のＭＩＧ溶接では、溶
接ワイヤを「ＪＩＳ Ｚ３２３２〕に規定されているＡ
ｌ純度が高くＳｉ含有量の低いＡ１０００系アルミニウ
ムワイヤや、Ｍｎ、Ｍｇ、Ｃｒ、Ｔｉ等を添加し、かつ
Ｓｉ含有量の少ないＡ５０００系アルミニウム合金ワイ
ヤに限定して溶接している。これは、Ｓｉを４．５〜
６．０％あるいは１１．０〜１３．０％と各々多量に含
有するＡ４０４３−ＷＹやＡ４０４７−ＷＹ等のＡ４０
００系アルミニウム合金ワイヤを使用すると、アルマイ
ト処理した溶接ビード部の色調が母材と大きく異なるた
めである。2. Description of the Related Art Conventionally, aluminum-based structures for buildings and civil engineering, structures for vehicles, structures for ships, and the like have been formed as follows. (1) Aluminum members that have been subjected to surface treatment such as painting, alumite treatment, or hairline processing are joined together using a mechanical joining method such as bolt joining. (2) When an aluminum-based member is welded by TIG welding or MIG welding, a coating process is performed after removing a welding bead by cutting, grinding, or the like. (3) In MIG welding of a member to be subjected to alumite treatment, the welding wire is set to A according to “JIS Z3232”.
Welding is limited to A1000-based aluminum wires with high purity and low Si content, and A5000-based aluminum alloy wires with added Mn, Mg, Cr, Ti, etc., and with low Si content. This means that the Si
A4043 such as A4043-WY or A4047-WY which contains a large amount of 6.0% or 11.0 to 13.0%, respectively.
This is because the use of the 00-based aluminum alloy wire greatly changes the color tone of the weld bead portion subjected to the alumite treatment from the base material.
【０００３】[0003]
【発明が解決しようとする課題】上記のような方法には
以下のような問題点がある。 （１）予め塗装、アルマイト処理、またはヘアライン加
工等の表面処理の済んだアルミニウム系部材同士をボル
ト接合等の機械的結合方法を用いて接合する方法では、
人手と時間が掛かる。 （２）ＭＩＧ溶接では上記のようなフィラーワイヤが用
いられるので、溶接部と母材部の成分・組織が異なるた
め、アルマイト処理した場合には、溶接部と母材部の色
調が異なる。また、溶接変形量が大きく、溶接後に変形
の矯正を必要とすることがあり、そのため工程が増え、
構造体の製造コストが高くなる。 （３）フィラーワイヤを用いないＴＩＧ溶接では、「Ｊ
ＩＳ Ｈ ４１００」に規定される１０００系、３００
０系、４０００系、５０００系のアルミニウム系押出形
材の溶接は問題ないが、２０００系、６０００系、７０
００系のアルミニウム系押出形材では溶接割れが発生し
易い。また、溶接割れが発生しない場合でも溶接部は凝
固組織となるため、アルマイト処理後は、溶接部と母材
部の色調が異なる。また、前記ＭＩＧ溶接と同様に、溶
接変形量が大きく、溶接後に変形の矯正を必要とするこ
とがあり、そのため工程が増え、構造体の製造コストが
高くなる。The above-described method has the following problems. (1) In a method of joining aluminum-based members that have been subjected to surface treatment such as painting, alumite treatment, or hairline processing in advance using a mechanical joining method such as bolt joining,
It takes time and labor. (2) Since the filler wire as described above is used in MIG welding, the components and structures of the welded portion and the base material portion are different, so that when the alumite treatment is performed, the color tone of the welded portion and the base material portion are different. In addition, the amount of welding deformation is large, and it may be necessary to correct the deformation after welding, so the number of steps increases,
The manufacturing cost of the structure increases. (3) In TIG welding without using a filler wire, "J
1000 series, 300 defined in "ISH 4100"
Welding of 0 series, 4000 series, 5000 series aluminum-based extruded sections is no problem, but 2000 series, 6000 series, 70 series.
In the case of a 00-based extruded aluminum material, welding cracks are likely to occur. Further, even when no weld cracking occurs, the welded portion has a solidified structure, so that after the alumite treatment, the color tone of the welded portion and the base material portion are different. Further, as in the case of the MIG welding, the amount of welding deformation is large, and correction of the deformation may be required after welding. Therefore, the number of steps is increased, and the manufacturing cost of the structure is increased.
【０００４】また、前記の方法以外に、適切な接着剤を
用いた接着による構造体の形成方法もあるが、この方法
による場合は、塗装性やアルマイト処理性には問題がな
い。しかし、接合強度に問題があり、強度が要求される
アルミニウム系構造体、例えば、前記の建築・土木用構
造体、車両用構造体、船舶用構造体等には適用できな
い。In addition to the above-mentioned method, there is also a method of forming a structure by bonding using an appropriate adhesive, but this method has no problem in paintability and alumite treatment. However, there is a problem in joining strength, and it cannot be applied to an aluminum-based structure that requires strength, for example, the above-mentioned building / civil structure, vehicle structure, marine structure, and the like.
【０００５】本発明は、前記従来技術の問題点を解消
し、接合強度が要求される建築・土木用構造体、車両用
構造体、船舶用構造体等は勿論接合強度がそれほど要求
されない一般構造体体としても用いられ、アルミニウム
系部材を接合してなる、アルマイト処理、塗装又はヘア
ライン加工等の表面処理性に優れ、かつ、接合変形量が
少なく景観性に優れるアルミニウム系構造体およびその
製造方法の提供を課題とする。The present invention solves the above-mentioned problems of the prior art, and is applicable not only to structures for construction and civil engineering, structures for vehicles, structures for ships, etc., for which joint strength is required, but also to general structures for which joint strength is not so much required. An aluminum-based structure which is also used as a body and has excellent surface treatment properties such as alumite treatment, painting or hairline processing, which is obtained by joining aluminum-based members, and has a small amount of joint deformation and excellent landscape, and a method for producing the same. To provide
【０００６】[0006]
【課題を解決するための手段】本発明は、上記課題を解
決するために、外表面にアルマイト処理、塗装又はヘア
ライン加工される複数のアルミニウム及び／又はアルミ
ニウム合金部材を接合してなり、表面処理性に優れるア
ルミニウム系構造体を、前記外表面の裏側から摩擦攪拌
接合により接合した表面処理性に優れる接合部を有する
ことを特徴とするように構成したものである。According to the present invention, a plurality of aluminum and / or aluminum alloy members to be subjected to alumite treatment, painting or hairline processing are joined to an outer surface to solve the above-mentioned problems. An aluminum-based structure having excellent properties is provided with a joint having excellent surface treatment properties joined by friction stir welding from the back side of the outer surface.
【０００７】本発明においては、上記の表面処理性に優
れるアルミニウム系構造体を、前記外表面に接触する摩
擦攪拌接合用裏当の表面粗さがＲmax ６．３Ｓ以下、Ｒ
max ０．８Ｓ以上であるように構成することが望まし
い。In the present invention, the above-mentioned aluminum-based structure having excellent surface treatment properties is prepared by reducing the surface roughness of the backing for friction stir welding in contact with the outer surface to Rmax 6.3S or less.
It is desirable to configure so that max is 0.8S or more.
【０００８】本発明においてはまた、上記の表面処理性
に優れるアルミニウム系構造体が、前記外表面に接触す
る摩擦攪拌接合用裏当の表面粗さがＲmax ６．３Ｓを超
え、Ｒmax ２５Ｓ以下である場合に、該裏当てに接触し
た前記外表面の接合部表面をヘアライン加工したもので
あることが望ましい。[0008] In the present invention, the aluminum-based structure having excellent surface treatment properties may have a surface roughness of the backing for friction stir welding in contact with the outer surface exceeding Rmax 6.3S and Rmax 25S or less. In some cases, it is desirable that the surface of the joint at the outer surface in contact with the backing be subjected to hairline processing.
【０００９】本発明は、上記課題を解決するために、外
表面にアルマイト処理、塗装又はヘアライン加工される
複数のアルミニウム及び／又はアルミニウム合金部材を
接合してなり、表面処理性に優れるアルミニウム系構造
体の製造方法を、前記外表面の裏側から摩擦攪拌接合に
より接合することを特徴とするように構成したものであ
る。[0009] In order to solve the above-mentioned problems, the present invention provides an aluminum-based structure having a plurality of aluminum and / or aluminum alloy members which are subjected to alumite treatment, painting or hairline processing on the outer surface, and which has excellent surface treatment properties. The method of manufacturing a body is characterized in that the body is joined by friction stir welding from the back side of the outer surface.
【００１０】本発明においては、上記の表面処理性に優
れるアルミニウム系構造体の製造方法を、前記外表面に
接触する摩擦攪拌接合用裏当の表面粗さがＲmax ６．３
Ｓ以下、Ｒmax ０．８Ｓ以上であるように構成すること
が望ましい。In the present invention, the method for producing an aluminum-based structure having excellent surface treatment properties described above is characterized in that the backing for friction stir welding in contact with the outer surface has a surface roughness of Rmax 6.3.
It is desirable that the value be equal to or smaller than S and equal to or larger than Rmax 0.8S.
【００１１】本発明においてはまた、上記の表面処理性
に優れるアルミニウム系構造体の製造方法を、前記外表
面に接触する摩擦攪拌接合用裏当の表面粗さがＲmax
６．３Ｓを超え、Ｒmax ２５Ｓ以下である場合に、該裏
当てに接触した前記外表面の接合部表面をヘアライン加
工するように構成することが望ましい。In the present invention, the above-mentioned method for producing an aluminum-based structure having excellent surface treatment properties is characterized in that the friction stir welding backing contacting the outer surface has a surface roughness of Rmax.
When it exceeds 6.3S and is not more than Rmax 25S, it is preferable that a hairline process is performed on the surface of the joint portion of the outer surface that is in contact with the backing.
【００１２】[0012]
【発明の実施の形態】本発明の実施の形態を、添付の図
面と具体的な実施例に基づいて以下に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings and specific examples.
【００１３】１．実施例１ 本発明の請求項１および請求項４に係る実施例とその比
較例として、下記の実験を行った。すなわち、試験片と
して長さ３００mm、幅１００ｍｍ、厚さ３mmの、「JIS
H 4000」に規定されるアルミニウム合金板材５０８３−
Ｈ３４と、「JIS H 4100」に規定されるアルミニウム押
出形材６Ｎ０１−Ｔ５をそれぞれ用いて、下記の３種類
の接合方法を用いた突合わせ接合と、突合わせ接合部の
加工を行い、その後アルマイト処理を行った。1. Example 1 The following experiment was performed as an example according to claims 1 and 4 of the present invention and a comparative example thereof. That is, a test piece having a length of 300 mm, a width of 100 mm, and a thickness of 3 mm, "JIS
H 4000 ”aluminum alloy sheet material 5083-
H34 and aluminum extrusion 6N01-T5 stipulated in "JIS H 4100" are used for butt joining using the following three joining methods and butt joint processing, and then anodized. Processing was performed.
【００１４】（１）表面処理する外表面に表面粗さがＲ
max ６．３Ｓの裏当材を当て、前記外表面の裏側から摩
擦攪拌接合（以下、ＦＳＷと略称することがある）を行
い、接合後の外表面の接合部の加工は行わない。 （２）「JIS Z 3232」に規定されるアルミニウム合金フ
ィラーワイヤＡ５３５６−ＷＹを用いてＭＩＧ溶接を行
い、溶接ビードを切削加工によって削除し、表面粗さが
Ｒmax ６．３Ｓになるように仕上げた。 （３）フィラーワイヤや溶加棒を用いないでＴＩＧ溶接
を行い、溶接ビードを切削加工によって削除し、表面粗
さがＲmax ６．３Ｓになるように仕上げた。(1) The outer surface to be surface-treated has a surface roughness of R
A backing material having a max of 6.3S is applied, friction stir welding (hereinafter, may be abbreviated as FSW) is performed from the back side of the outer surface, and processing of a bonded portion of the outer surface after the bonding is not performed. (2) MIG welding was performed using an aluminum alloy filler wire A5356-WY specified in "JIS Z 3232", the weld bead was removed by cutting, and the surface roughness was finished to Rmax 6.3S. . (3) TIG welding was performed without using a filler wire or a filler rod, the weld bead was removed by cutting, and the surface roughness was finished to be Rmax 6.3S.
【００１５】なお、上記（１）項の摩擦攪拌接合は以下
のように行われる。すなわち、図１の断面図に示すよう
に、接合後表面処理される各々の外表面１osと２osが下
面となるように、一対の被接合材１と２の端面同士を接
触させて突合わせ部３を形成し、該突合わせ部３の周辺
の前記外表面１osと２osに表面４usが接するように裏当
４を配置する。そして、前記一対の被接合材１、２の裏
面１rs、２rs側から、摩擦攪拌接合用プローブ本体５の
凹面または平面の円形底面５bsの中心から前記プローブ
本体５の回転軸と同軸に下方へ突出した攪拌ピン６を回
転させつつ前記突合わせ部の一対の被接合材１、２に押
し込み、前記プローブ本体５を矢印Ｆpで示す方向へ所
定の押圧力Ｆp(kgf)で押圧して、プローブ本体５の凹面
または平面の円形底面５bsを前記被接合材１、２の裏面
１rs、２rsに押し付けながら、前記プローブ本体を矢印
（ｒ）の方向に回転させつつ接合ライン（突合わせ部３
の上端線）に沿って、図１の紙面に垂直な方向に移動さ
せて、攪拌ピン６の周囲やプローブ本体５の凹面または
平面の円形底面５bsの下方に発生する摩擦熱で、前記突
合わせ部３を固相接合する。The friction stir welding of the above item (1) is performed as follows. That is, as shown in the cross-sectional view of FIG. 1, the end surfaces of the pair of materials 1 and 2 are brought into contact with each other so that the outer surfaces 1os and 2os subjected to the surface treatment after the bonding become lower surfaces. 3 is formed, and the backing 4 is arranged so that a surface 4us is in contact with the outer surfaces 1os and 2os around the butting portion 3. Then, from the back surface 1rs, 2rs side of the pair of workpieces 1, 2 project downward from the center of the concave or flat circular bottom surface 5bs of the probe body 5 for friction stir welding coaxially with the rotation axis of the probe body 5. The rotating stirring pin 6 is pushed into the pair of workpieces 1 and 2 of the butting portion while rotating, and the probe body 5 is pressed in a direction indicated by an arrow Fp with a predetermined pressing force Fp (kgf). 5 while pressing the concave or flat circular bottom surface 5bs against the back surfaces 1rs and 2rs of the workpieces 1 and 2, while rotating the probe body in the direction of the arrow (r), the bonding line (butting portion 3) is rotated.
1 in the direction perpendicular to the paper surface of FIG. 1, and the friction heat generated around the stirring pin 6 or below the concave surface of the probe body 5 or below the circular bottom surface 5bs of the flat surface is used. The part 3 is solid-phase bonded.
【００１６】上記のように接合・接合部加工・アルマイ
ト処理した試験片の溶接割れの有無の目視観察、接合
（溶接）変形量の測定とアルマイト処理後の母材と接合
部の色調差の目視観察を行い、その結果を下記表１に示
した。なお、接合（溶接）変形量の測定は以下のように
行った。すなわち、図２の斜視図に示すように、一対の
被接合材１と２とを接合ライン３tlに沿って接合した接
合材７を、その反り方向が上面になるように表面が平坦
な定盤８の上に載置し、前記接合材７の長手方向（接合
法ライン３tlの方向）の両端、および、長手方向を略三
等分する位置の合計４箇所、前記接合材７の幅方向の両
端の合計２箇所、全合計で４×２＝８箇所の前記接合材
７の端面の位置７pmで、該接合材７の表面から定盤８の
上面までの高さをダイヤルゲージ９により測定し、これ
ら８箇所の測定値の一つの値を基準値として、その他の
測定値の前記基準値に対する変化量（差）で溶接変形量
を求めた。Visual observation of the presence or absence of weld cracks in the test piece subjected to the above-mentioned joining, joining portion processing, and alumite treatment, measurement of the amount of joint (welding) deformation, and visual observation of the color tone difference between the base material and the joint after the alumite treatment. Observations were made and the results are shown in Table 1 below. The measurement of the amount of joint (welding) deformation was performed as follows. That is, as shown in the perspective view of FIG. 2, a joining material 7 in which a pair of materials to be joined 1 and 2 are joined along a joining line 3tl is formed on a surface plate having a flat surface so that the warping direction is the upper surface. 8, a total of four positions in the longitudinal direction of the joining material 7 (in the direction of the joining method line 3tl), and at positions where the longitudinal direction is substantially equally divided into three, in the width direction of the joining material 7 the total two places at both ends, at the position 7pm the end face of the bonding material 7 of 4 × 2 = 8 points in total sum, the height from the surface of the bonding material 7 to the top surface of the base plate 8 is measured by a dial gauge 9 Using one of these eight measured values as a reference value, the amount of change in welding (difference) from the other measured values with respect to the reference value was determined.
【００１７】[0017]
【表１】 [Table 1]
【００１８】上記表１から、以下のことがいえる。 （１）アルマイト処理後の母材と接合部の色調差は、摩
擦攪拌接合された部材では見られなかったが、上記のフ
ィラーワイヤＡ５３５６−ＷＹを用いたＭＩＧ溶接部材
では、若干の色調差が見られた。溶加棒を用いないＴＩ
Ｇ溶接部材では、前記アルミニウム合金５０８３−Ｈ３
４を母材としたものも６Ｎ０１−Ｔ５を母材としたもの
でも、色調差は非常に軽微であった。 （２）溶接割れは、前記アルミニウム合金６Ｎ０１−Ｔ
５を母材としたＴＩＧ溶接部材で発生したが、その他で
は発生しなかった。 （３）接合（溶接）変形量は、摩擦攪拌接合部材では１
mm以下と小さかったが、ＭＩＧ溶接部材およびＴＩＧ溶
接部材では３mm以上と大きかった。From the above Table 1, the following can be said. (1) The color tone difference between the base material and the joint after the alumite treatment was not observed in the friction stir welded member, but in the MIG welded member using the filler wire A5356-WY, a slight color tone difference was observed. Was seen. TI without filler rod
In the G welding member, the aluminum alloy 5083-H3
The color tone difference was very small in both the base material of No. 4 and the base material of 6N01-T5. (2) Weld cracking is caused by the aluminum alloy 6N01-T
No. 5 occurred in the TIG welded member with the base material, but did not occur in the others. (3) The amount of welding (welding) deformation is 1 for friction stir welding members.
mm or less, but was as large as 3 mm or more for the MIG welded member and the TIG welded member.
【００１９】以上のことから、アルマイト処理する外表
面に表面粗さがＲmax ６．３Ｓの裏当を当て、前記外表
面の裏側から摩擦攪拌接合した部材は、アルマイト処理
後の母材と接合部の色調差はみられず、溶接割れもな
く、接合（溶接）変形量も小さいことから、表面処理性
に優れ、その他の観点も含めて景観性に優れたアルミニ
ウム系構造体であり、また、アルマイト処理する外表面
の裏側から摩擦攪拌接合する方法は、表面処理性に優
れ、その他の外観も含めて景観性に優れたアルミニウム
系構造体を製造するに適した方法であることが分かる。From the above, a backing having a surface roughness of Rmax 6.3S is applied to the outer surface to be subjected to the alumite treatment, and the member subjected to friction stir welding from the back side of the outer surface is bonded to the base material after the alumite treatment by the joint. Is an aluminum-based structure that has excellent surface treatment properties and excellent landscape properties from other viewpoints, since there is no color tone difference, no welding cracks, and a small amount of joint (welding) deformation. It can be seen that the method of friction stir welding from the back side of the outer surface to be subjected to alumite treatment is a method suitable for producing an aluminum-based structure having excellent surface treatment properties and excellent appearance including other appearances.
【００２０】２．実施例２ 本発明の請求項１および請求項４に係る他の実施例とそ
の比較例として、下記の実験を行った。すなわち、前記
実施例１に示したのと同寸法で、同じ２種類のアルミニ
ウム合金材料を用いた試験片を、前記実施例１の（１）
〜（３）項に示したのと同じ３種類の接合方法を用いた
突合わせ接合と、突合わせ接合部の加工を行い、その後
塗装処理を行った。なお、塗装は接合材を脱脂処理後、
市販のカラースプレー塗料を用いてスプレー塗装を行っ
た。2. Example 2 The following experiment was performed as another example according to claims 1 and 4 of the present invention and a comparative example thereof. That is, a test piece having the same dimensions and the same two kinds of aluminum alloy materials as shown in the first embodiment was used as the test piece (1) of the first embodiment.
Butt joining using the same three kinds of joining methods as shown in the items (3) to (3) and processing of the butt joint were carried out, and then coating treatment was carried out. In addition, after painting, after degreasing the joining material,
Spray painting was performed using a commercially available color spray paint.
【００２１】上記のように接合・接合部加工・塗装処理
した試験片の溶接割れの有無の目視観察、接合（溶接）
変形量の測定と塗装処理後の母材と接合部の色調差の目
視観察、さらに塗膜の付着性試験を行い、その結果を下
記表２に示した。なお、塗膜の付着性試験は「JIS H 02
01」( 「JIS H 8602」、「JIS K 5400」）に規定するス
クラッチ試験によった。Visual observation and welding (welding) of the test pieces subjected to the above-mentioned joining, joint processing and painting processing for the presence or absence of welding cracks.
The measurement of the amount of deformation, the visual observation of the color tone difference between the base material and the joint after the coating treatment, and the adhesion test of the coating film were performed. The results are shown in Table 2 below. In addition, the adhesion test of the coating film is described in JIS H 02
01 "(" JIS H 8602 "," JIS K 5400 ").
【００２２】[0022]
【表２】 [Table 2]
【００２３】上記表２から、以下のことがいえる。 （１）塗装処理後の母材と接合部の塗膜の色調差は、前
記３種類の接合・接合部加工方法の間には見られなかっ
た。 （２）塗膜の付着性試験結果は、接合方法および接合部
加工方法による差は殆ど見られなかった。 （３）溶接割れは、前記６Ｎ０１−Ｔ５合金をＴＩＧ溶
接したもの以外では観察されなかった。 （４）接合（溶接）変形量は，摩擦攪拌接合部材では１
mm以下と小さかったが、ＭＩＧ溶接部材およびＴＩＧ溶
接部材では３mm以上と大きかった。From the above Table 2, the following can be said. (1) No difference in color tone between the base material after the coating treatment and the coating film of the joint was observed between the three types of joining / joining part processing methods. (2) In the adhesion test result of the coating film, almost no difference was observed between the joining method and the joint processing method. (3) No welding cracks were observed except for those obtained by TIG welding of the 6N01-T5 alloy. (4) The amount of welding (welding) deformation is 1 for friction stir welding members.
mm or less, but was as large as 3 mm or more for the MIG welded member and the TIG welded member.
【００２４】以上のことから、塗装処理する外表面の裏
側から摩擦攪拌接合した部材は、塗装処理後の母材と接
合部の色調差はみられず、塗膜の付着性もよく、溶接割
れもなく、接合（溶接）変形量も小さいことから、表面
処理性に優れ、その他の外観も含めて景観性に優れたア
ルミニウム系構造体であり、また、塗装処理する外表面
の裏側から摩擦攪拌接合する方法は、表面処理性に優
れ、接合（溶接）変形量も小さく、その他の観点も含め
て景観性に優れたアルミニウム系構造体を製造するに適
した方法であることが分かる。As described above, the friction stir welded member from the back side of the outer surface to be coated does not show a difference in color tone between the base material and the joint after the coating, has good adhesion of the coating film, and has a weld crack. It is an aluminum-based structure with excellent surface treatment properties and excellent appearance including other appearances due to the small amount of joint (welding) deformation, and friction stirring from the back side of the outer surface to be coated It can be seen that the joining method is a method suitable for producing an aluminum-based structure having excellent surface treatment properties, a small amount of joining (welding) deformation, and excellent scenery from other viewpoints.
【００２５】３．実施例３ 本発明の請求項２と請求項３および請求項５と請求項６
に係る実施例とその比較例として、下記の実験を行っ
た。すなわち、試験片として長さ３００mm、幅１００ｍ
ｍ、厚さ３mmの前記アルミニウム合金板材６Ｎ０１−Ｔ
５を用いた。前記実施例１と実施例２に示されたよう
に、ＭＩＧ溶接およびＴＩＧ溶接では溶接割れが発生し
たり、接合（溶接）変形量が摩擦攪拌接合に比べて大き
いこと、さらにアルマイト処理において色調差がみられ
たので、突合わせ接合法は摩擦攪拌接合に限定した。外
表面にアルマイト処理される前記のアルミニウム合金部
材を、前記外表面の裏側から摩擦攪拌接合する際に、該
外表面に接触する摩擦攪拌接合用裏当の表面粗さを３段
階に分け、該裏当の表面が転写された外表面をアルマイ
ト処理して、前記摩擦攪拌接合用裏当の表面粗さとアル
マイト処理後の外観（母材部と接合部の色調差）との関
係を調査した。なお、この際、アルマイト処理前に前記
外表面（裏当接触側）をヘアライン加工した場合と、ヘ
アライン加工しない場合について分けて調査した。その
調査結果を下記表３に示す。3. Embodiment 3 Claims 2 and 3 and claims 5 and 6 of the present invention
The following experiment was conducted as an example according to and a comparative example. That is, the test piece is 300 mm long and 100 m wide
m, 3 mm thick aluminum alloy plate 6N01-T
5 was used. As shown in Examples 1 and 2, welding cracks occur in MIG welding and TIG welding, and the amount of welding (welding) deformation is larger than that in friction stir welding. However, butt welding was limited to friction stir welding. When friction stir welding is performed on the aluminum alloy member whose outer surface is to be anodized from the back side of the outer surface, the surface roughness of the friction stir welding backing contacting the outer surface is divided into three stages. The outer surface to which the surface of the backing was transferred was subjected to alumite treatment, and the relationship between the surface roughness of the friction stir welding backing and the appearance after the alumite treatment (color difference between the base material and the joint) was investigated. In this case, the case where the outer surface (back contact side) was subjected to the hairline processing before the alumite treatment and the case where the hairline processing was not performed were separately investigated. The results of the investigation are shown in Table 3 below.
【００２６】[0026]
【表３】 [Table 3]
【００２７】上記表３から、以下のことがいえる。 （１）裏当の表面粗さがＲmax ６．３Ｓ以下であれば、
裏当の当接面のヘアライン加工の有無に関わりなく、母
材部と接合部の色調差がなく、良好な外観が得られた。 （２）裏当の表面粗さがＲmax ２５Ｓの場合には、ヘア
ライン加工を施した場合は、母材部と接合部の色調差が
なく、良好な外観が得られた。しかし、ヘアライン加工
なしの場合には、母材部と接合部との表面粗さが異なる
ために両者の色調差が明確に認められ、母材部と接合部
とがハッキリ判別された。From the above Table 3, the following can be said. (1) If the surface roughness of the backing is less than Rmax 6.3S,
Regardless of the presence or absence of the hairline processing on the contact surface of the backing, there was no difference in color tone between the base material and the joint, and a good appearance was obtained. (2) When the surface roughness of the backing was Rmax 25S, when the hairline processing was performed, there was no difference in color tone between the base material and the joint, and a good appearance was obtained. However, when the hairline processing was not performed, since the surface roughness of the base material portion and the joint portion were different, a difference in color tone was clearly recognized between the two, and the base material portion and the joint portion were clearly distinguished.
【００２８】以上のことから、アルマイト処理する外表
面の裏側から摩擦攪拌接合した部材は、外表面と接触す
る摩擦攪拌接合用裏当の表面粗さが、Ｒmax ６．３Ｓ以
下であれば、裏当の当接面のヘアライン加工の有無に関
わりなく、母材部と接合部の色調差がなく、その他の観
点（例えば、被接合材変形量）も含めて良好な景観性が
得られ、表面処理性に優れたアルミニウム系構造体とし
て適し、アルミニウム系部材を表面処理する外表面の裏
側から摩擦攪拌接合する際の、摩擦攪拌接合用裏当ての
表面粗さがＲmax ６．３Ｓ以下のものを使用する方法
は、表面処理性のすぐれたアルミニウム系構造体の製造
法として、適切であることが分かる。From the above, the friction stir welded member from the back side of the outer surface to be alumite-treated has a back surface for friction stir welding that comes into contact with the outer surface if the surface roughness is Rmax 6.3S or less. Regardless of the presence or absence of hairline processing on the abutting surface, there is no difference in color tone between the base material and the joint, and a good landscape is obtained from other viewpoints (for example, the amount of deformation of the material to be joined). It is suitable as an aluminum-based structure having excellent processability. When friction stir welding is performed from the back side of the outer surface of an aluminum-based member, the backing for friction stir welding has a surface roughness of Rmax 6.3S or less. It can be seen that the method used is appropriate as a method for producing an aluminum-based structure having excellent surface treatment properties.
【００２９】なお、摩擦攪拌接合用裏当の表面粗さは、
Ｒmax ０．８Ｓ以上であれば十分である。これは、前記
裏当の表面粗さがＲmax ６．３Ｓ〜Ｒmax ０．８Ｓの範
囲であれば、アルマイト処理後の母材部と接合部の色調
差がなく、表面粗さをＲmax０．８Ｓ未満にしようとす
れば、裏当の表面加工コストも上昇し、使用の回数を重
ねるに連れて裏当の表面粗さが急激に上昇し、直ぐに表
面粗さがＲmax ０．８Ｓ以上となってしまうからであ
る。The surface roughness of the backing for friction stir welding is as follows:
It is sufficient if Rmax is 0.8 S or more. This is because if the surface roughness of the backing is in the range of Rmax 6.3S to Rmax 0.8S, there is no color tone difference between the base material and the joint after the alumite treatment, and the surface roughness is less than Rmax 0.8S. In this case, the surface processing cost of the backing increases, and the surface roughness of the backing sharply increases as the number of times of use increases, and the surface roughness quickly becomes Rmax 0.8S or more. Because.
【００３０】さらに、アルマイト処理する外表面の裏側
から摩擦攪拌接合した部材は、外表面と接触する摩擦攪
拌接合用裏当の表面粗さが、Ｒmax ６．３Ｓを超え、Ｒ
max２５Ｓ以下の場合は、外表面の接合部をヘアライン
加工したものであれば、母材部と接合部の色調差がな
く、その他の観点（例えば、被接合材変形量）も含めて
良好な景観性が得らる表面処理性に優れたアルミニウム
系構造体として適し、アルミニウム系部材を表面処理す
る外表面の裏側から摩擦攪拌接合する際の、摩擦攪拌接
合用裏当ての表面粗さがＲmax ６．３Ｓを超え、Ｒmax
２５Ｓ以下の場合に、該裏当の接触部位をヘアライン加
工する方法は、表面処理性のすぐれたアルミニウム系構
造体の製造法として、適切であることが分かる。Further, the friction stir welded member from the back side of the outer surface to be subjected to the alumite treatment has a surface roughness of the friction stir welding backing contacting the outer surface exceeding Rmax 6.3S, and
In the case of max 25S or less, if the joint on the outer surface is subjected to hairline processing, there is no color tone difference between the base material and the joint, and a good landscape including other viewpoints (for example, the amount of deformation of the material to be joined) It is suitable as an aluminum-based structure having excellent surface treatment properties to obtain the property, and the friction stir welding backing has a surface roughness of Rmax 6 when friction stir welding is performed from the back side of the outer surface on which the aluminum member is subjected to surface treatment. Over 3S, Rmax
In the case of 25S or less, it can be seen that the method of hairline processing the contact portion of the backing is suitable as a method for producing an aluminum-based structure having excellent surface treatment properties.
【００３１】以上、本発明の実施の形態について具体的
な実施例に基づき説明したが、本発明は上記の実施の形
態に限られるものではなく、発明の構成の主旨を逸脱し
ない範囲内で、他の実施の形態を含むものである。Although the embodiments of the present invention have been described based on the specific embodiments, the present invention is not limited to the above-described embodiments, but may be made within the scope of the invention. It includes other embodiments.
【００３２】次に、上記に説明した本発明の実施の形態
の基本的な作用について、以下に述べる。すなわち、摩
擦攪拌接合されたアルミニウム系部材の外観は、接合中
に摩擦攪拌接合用回転プローブの底面と接した面はリッ
プル状の跡が観察されるが、裏面は非常に平滑である。
また、接合部の内部は非常に微細な組織を備え、母材部
よりも結晶粒径は小さい。また、ＭＩＧ溶接やＴＩＧ溶
接のような溶融溶接で見られるような溶接欠陥も存在し
ない。前記表１や表３に示したように、外表面にアルマ
イト処理を施される複数のアルミニウム及び／又はアル
ミニウム合金部材を、前記外表面の裏側から摩擦攪拌接
合された部材の前記外表面にアルマイト処理した場合、
母材部と接合部に色調差のないものが得られた。この理
由としては、フィラーワイヤを用いないため母材部と接
合部の成分が同じで、粒径の差があるものの金属組織と
しては同じ加工組織（再結晶組織）が得られること、ま
た、強い塑性歪みの下で熱間加工される固相接合プロセ
スであるため接合部の組織が微細であることによると考
えられる。さらに、接合部内に欠陥がないことも理由の
一つである。前記表２に示したように、塗装処理におい
ても、上記アルマイト処理と同じ理由により、接合部に
おいても塗装下地処理性に優れるために、接合部におい
ても塗膜の付着性の優れたアルミニウム系構造体が得ら
れるものと考えられる。Next, the basic operation of the above-described embodiment of the present invention will be described below. That is, as for the appearance of the friction stir welded aluminum-based member, the surface in contact with the bottom surface of the rotary probe for friction stir welding during welding has a ripple-like trace, but the back surface is very smooth.
Further, the inside of the joint has a very fine structure, and has a smaller crystal grain size than the base material. Further, there are no welding defects such as those found in fusion welding such as MIG welding and TIG welding. As shown in Tables 1 and 3, a plurality of aluminum and / or aluminum alloy members whose outer surfaces are subjected to anodizing are alumite-bonded to the outer surfaces of the members friction stir welded from behind the outer surfaces. If processed,
One having no difference in color tone between the base material and the joint was obtained. The reason for this is that since the filler wire is not used, the components of the base material portion and the joining portion are the same, and although there is a difference in particle size, the same processed structure (recrystallized structure) can be obtained as the metal structure. This is considered to be due to the fact that the structure of the joint is fine because it is a solid-phase joining process in which hot working is performed under plastic strain. Another reason is that there is no defect in the joint. As shown in Table 2 above, in the coating treatment, for the same reason as in the above-described alumite treatment, the aluminum-based structure having excellent adhesion of the coating film also in the bonding part because the coating part is excellent in the coating base treatment property. It is thought that the body can be obtained.
【００３３】さらに、鋳物と展伸材および鋳物同士を接
合する場合、ＭＩＧ溶接やＴＩＧ溶接等の溶融溶接で
は、接合部の品質は材料の鋳物の品質に大きな影響を受
ける。すなわち、水素その他のガスを含む鋳物をＭＩＧ
溶接やＴＩＧ溶接等の溶融溶接を施した場合、溶融金属
の冷却・凝固時にガスが放出され溶接部の内部に多量の
ポロシティが発生する。それに対して、摩擦攪拌接合は
固相プロセスであるので、接合部にポロシティ等の欠陥
が発生しない。その結果、アルマイト処理性および塗装
性に優れるアルミニウム系構造体が得られる。Further, in the case of joining a cast, a wrought material, and a cast to each other, in fusion welding such as MIG welding or TIG welding, the quality of the joint is greatly affected by the quality of the cast material. That is, castings containing hydrogen and other gases are
When welding or fusion welding such as TIG welding is performed, gas is released when the molten metal is cooled and solidified, and a large amount of porosity is generated inside the welded portion. On the other hand, since friction stir welding is a solid-phase process, defects such as porosity do not occur at the joint. As a result, an aluminum-based structure having excellent alumite treatment properties and coatability is obtained.
【００３４】[0034]
【発明の効果】本発明の表面処理性に優れるアルミニウ
ム系構造体及びその製造方法によれば以下のように優れ
た効果を奏する。 （１）予め表面処理の済んだアルミニウム系部材同士を
ボルト接合等の機械的結合方法を用いて接合する場合に
比べ、人手と時間が掛からない。 （２）ＭＩＧ溶接やＴＩＧ溶接のような溶融溶接の場合
に比べて、溶接割れ、ポロシティ等の欠陥がなく、また
接合（溶接変形）も少なくアルマイト処理した場合に、
母材部と接合部との間に色調差のない、表面処理性に優
れ、他の観点｛例えば、接合（溶接）変形量｝を含めて
景観性の良いアルミニウム系構造体が容易に形成可能で
ある。 （３）接着剤を用いた接着による構造体の形成方法に比
べて、接合強度が要求されるアルミニウム系構造体、例
えば、建築・土木用構造体、車両用構造体、船舶用構造
体等に適用でき、かつ接合強度がそれほど要求されない
一般構造体としても用いられるアルミニウム系構造体が
容易に得られる。According to the aluminum-based structure having excellent surface treatment properties of the present invention and the method for producing the same, the following excellent effects can be obtained. (1) Compared with a case where aluminum-based members that have been surface-treated in advance are joined by using a mechanical joining method such as bolt joining, it takes less time and labor. (2) Compared to the case of fusion welding such as MIG welding or TIG welding, when there is no defect such as welding cracks, porosity, etc.
Excellent surface treatment with no color difference between base material and joint, easy to form aluminum-based structure with good landscape including other viewpoints (eg, joint (welding) deformation) It is. (3) For an aluminum-based structure requiring a higher bonding strength than a method of forming a structure by bonding using an adhesive, for example, a structure for buildings and civil engineering, a structure for vehicles, a structure for ships, and the like. An aluminum-based structure that can be applied and is used as a general structure that does not require much bonding strength can be easily obtained.
【図１】 請求項１〜３に係る本発明の表面処理性に優
れるアルミニウム系構造体を製造するための、請求項５
〜７に係る本発明の表面処理性に優れるアルミニウム系
構造体の製造に適用される摩擦攪拌接合方法をしめす概
略断面図である。FIG. 1 is a cross-sectional view illustrating a method for manufacturing an aluminum-based structure having excellent surface treatment properties according to the present invention.
It is a schematic sectional drawing which shows the friction stir welding method applied to manufacture of the aluminum-based structure excellent in the surface treatment property of this invention which concerns on -7.
【図２】 突合わせ接合（溶接）後の接合（溶接）材の
変形量の測定方法を示す斜視図である。FIG. 2 is a perspective view showing a method of measuring a deformation amount of a joining (welding) material after butt joining (welding).
１、２ 被接合材 ３ 突合わせ部 ４ 裏当 ５ プローブ本体 ５bs 凹面または平面の底面 ６ 攪拌ピン ７ 接合材 ８ 定盤 ９ ダイヤルゲージ 1, 2 Material to be joined 3 Butt 4 Backing 5 Probe body 5bs Concave or flat bottom surface 6 Stirring pin 7 Joining material 8 Surface plate 9 Dial gauge
Claims (6)
アライン加工される複数のアルミニウム及び／又はアル
ミニウム合金部材を接合してなり、表面処理性に優れる
アルミニウム系構造体であって、 前記外表面の裏側から摩擦攪拌接合により接合した表面
処理性に優れる接合部を有することを特徴とした表面処
理性に優れるアルミニウム系構造体。1. An aluminum-based structure having excellent surface treatment properties, wherein a plurality of aluminum and / or aluminum alloy members to be subjected to alumite treatment, painting, or hairline processing are joined to the outer surface, and a back side of the outer surface. An aluminum-based structure having excellent surface treatment properties, characterized in that it has a joint having excellent surface treatment properties joined by friction stir welding.
裏当の表面粗さがＲmax ６．３Ｓ以下、Ｒmax ０．８Ｓ
以上である請求項１に記載の表面処理性に優れるアルミ
ニウム系構造体。2. The friction stir welding backing contacting the outer surface has a surface roughness of Rmax 6.3S or less and Rmax 0.8S.
The aluminum-based structure according to claim 1, which is excellent in surface treatment properties.
当の表面粗さがＲmax ６．３Ｓを超え、Ｒmax ２５Ｓ以
下の場合に、該裏当てに接触した前記外表面の接合部表
面をヘアライン加工したものである請求項１に記載の表
面処理性に優れるアルミニウム系構造体。3. When the surface roughness of the friction stir welding backing contacting the outer surface exceeds Rmax 6.3S and is not more than Rmax 25S, the surface of the outer surface contacted with the backing is contacted. 2. The aluminum-based structure having excellent surface treatment properties according to claim 1, which has been subjected to hairline processing.
アライン加工される複数のアルミニウム及び／又はアル
ミニウム合金部材を接合してなり、表面処理性に優れる
アルミニウム系構造体の製造方法であって、 前記外表面の裏側から摩擦攪拌接合により接合すること
を特徴とした表面処理性に優れるアルミニウム系構造体
の製造方法。4. A method for producing an aluminum-based structure having excellent surface treatment properties, wherein a plurality of aluminum and / or aluminum alloy members to be subjected to alumite treatment, painting, or hairline processing are joined to an outer surface thereof. A method for producing an aluminum-based structure having excellent surface treatment properties, wherein the aluminum-based structure is joined by friction stir welding from the back side of the surface.
裏当の表面粗さがＲmax ６．３Ｓ以下、Ｒmax ０．８Ｓ
以上である請求項４に記載の表面処理性に優れるアルミ
ニウム系構造体の製造方法。5. The friction stir welding backing contacting the outer surface has a surface roughness of Rmax 6.3S or less and Rmax 0.8S.
The method for producing an aluminum-based structure having excellent surface treatment properties according to claim 4, which is as described above.
当の表面粗さがＲmax ６．３Ｓを超え、Ｒmax ２５Ｓ以
下の場合に、該裏当てに接触した前記外表面の接合部表
面をヘアライン加工することを特徴とした請求項４に記
載の表面処理性に優れるアルミニウム系構造体の製造方
法。6. When the surface roughness of the backing for friction stir welding in contact with the outer surface exceeds Rmax 6.3S and is not more than Rmax 25S, the surface of the outer surface joined to the backing is contacted. The method for producing an aluminum-based structure having excellent surface treatment properties according to claim 4, wherein hairline processing is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9119998A JP3487332B2 (en) | 1998-04-03 | 1998-04-03 | Aluminum structure having excellent surface treatment properties and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9119998A JP3487332B2 (en) | 1998-04-03 | 1998-04-03 | Aluminum structure having excellent surface treatment properties and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11285862A true JPH11285862A (en) | 1999-10-19 |
| JP3487332B2 JP3487332B2 (en) | 2004-01-19 |
Family
ID=14019778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9119998A Expired - Lifetime JP3487332B2 (en) | 1998-04-03 | 1998-04-03 | Aluminum structure having excellent surface treatment properties and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3487332B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1400302A1 (en) * | 2002-09-20 | 2004-03-24 | Hitachi, Ltd. | Method of joining metallic materials by means of a friction stir tool |
| US6745929B1 (en) | 1998-06-16 | 2004-06-08 | Hitachi, Ltd. | Method of manufacturing structural body and structural body |
| JP2007319931A (en) * | 2006-05-02 | 2007-12-13 | Osaka Industrial Promotion Organization | Friction stir working method and backing fixture for friction stir working |
| JP2008238252A (en) * | 2007-03-29 | 2008-10-09 | Sumitomo Light Metal Ind Ltd | Manufacturing method of housing made of aluminum alloy, and housing manufactured by this method |
| WO2012046352A1 (en) * | 2010-10-08 | 2012-04-12 | 住友軽金属工業株式会社 | Aluminum alloy welded member |
| CN103894726A (en) * | 2014-03-13 | 2014-07-02 | 哈尔滨工业大学 | Friction stir welding method capable of achieving back thickening to eliminate weak connection and adapting to plate thickness changes |
-
1998
- 1998-04-03 JP JP9119998A patent/JP3487332B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6745929B1 (en) | 1998-06-16 | 2004-06-08 | Hitachi, Ltd. | Method of manufacturing structural body and structural body |
| EP1400302A1 (en) * | 2002-09-20 | 2004-03-24 | Hitachi, Ltd. | Method of joining metallic materials by means of a friction stir tool |
| US6843405B2 (en) | 2002-09-20 | 2005-01-18 | Hitachi, Ltd. | Method of joining metallic materials |
| JP2007319931A (en) * | 2006-05-02 | 2007-12-13 | Osaka Industrial Promotion Organization | Friction stir working method and backing fixture for friction stir working |
| JP4599608B2 (en) * | 2006-05-02 | 2010-12-15 | 財団法人大阪産業振興機構 | Friction stir processing method and backing jig for friction stir processing |
| JP2008238252A (en) * | 2007-03-29 | 2008-10-09 | Sumitomo Light Metal Ind Ltd | Manufacturing method of housing made of aluminum alloy, and housing manufactured by this method |
| WO2012046352A1 (en) * | 2010-10-08 | 2012-04-12 | 住友軽金属工業株式会社 | Aluminum alloy welded member |
| KR101399301B1 (en) * | 2010-10-08 | 2014-05-27 | 스미토모 게이 긴조쿠 고교 가부시키가이샤 | Aluminum alloy welded member |
| US9051633B2 (en) | 2010-10-08 | 2015-06-09 | Sumitomo Light Metal Industries, Ltd. | Aluminum alloy welded member |
| CN103894726A (en) * | 2014-03-13 | 2014-07-02 | 哈尔滨工业大学 | Friction stir welding method capable of achieving back thickening to eliminate weak connection and adapting to plate thickness changes |
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|---|---|
| JP3487332B2 (en) | 2004-01-19 |
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