JP2022118616A - Dissimilar metal joint and method for manufacturing the same - Google Patents

Dissimilar metal joint and method for manufacturing the same Download PDF

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JP2022118616A
JP2022118616A JP2021015267A JP2021015267A JP2022118616A JP 2022118616 A JP2022118616 A JP 2022118616A JP 2021015267 A JP2021015267 A JP 2021015267A JP 2021015267 A JP2021015267 A JP 2021015267A JP 2022118616 A JP2022118616 A JP 2022118616A
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hole
metal
solidified portion
metal material
overlap
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倫成 隅川
Michinari Sumikawa
大海 森戸
Oumi Morito
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Kinki Sharyo Co Ltd
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Abstract

To provide a dissimilar metal joint that is high in joint strength without using another member.SOLUTION: A first member 1 and a second member 2 are arranged in piles. The second member 2 comprises a second metal material having a melting point higher than the melting point of the first metal material of the first member 1. A third member 3 has a first solidification part 3X and a second solidification part 3Y. The third member comprises a third metal material containing the same metal as the metal of the main component of the first metal material as the main component. The first solidification part 3X has a portion existing in a through-hole 2h of the second member 2. The second solidification part 3Y is formed at a side opposite to the first member 1 with respect to the first solidification part 3X. The second solidification part 3Y has an overlapping part 13a overlapped with the through-hole 2h and a non-overlapping part 13b being not overlapped with the through-hole 2h, about a direction where the second member 2 overlaps with the first member 1. The non-overlapping part 13b is formed on a second opposite surface 2B of the second member 2. The second member 2 is sandwiched between the non-overlapping part 13b and the first member 1.SELECTED DRAWING: Figure 2

Description

本発明は、異種金属部材が重ね合わされた異種金属接合体および異種金属接合体の製造方法に関する。 TECHNICAL FIELD The present invention relates to a dissimilar metal bonded body in which dissimilar metal members are superimposed and a method for manufacturing the dissimilar metal bonded body.

異種金属部材が重ね合わされた異種金属接合体は、建物や乗物などの様々な分野で利用されている。例えば、鋼材とアルミニウム合金との接合体がある。鋼材とアルミニウム合金とを一般的な方法で溶接した場合、接合界面に脆い金属間化合物が形成される。金属間化合物は、鋼材とアルミニウム合金との接合強度を低下させる。そこで、これらの接合強度を高める技術が提案されている。 A dissimilar metal joined body in which dissimilar metal members are superimposed is used in various fields such as buildings and vehicles. For example, there is a joined body of steel material and aluminum alloy. When a steel material and an aluminum alloy are welded by a general method, a brittle intermetallic compound is formed at the joint interface. The intermetallic compound reduces the bonding strength between the steel material and the aluminum alloy. Therefore, techniques for increasing the bonding strength of these have been proposed.

特許文献1には、鋼部材と、貫通孔が形成されたアルミニウム合金部材とを重ね合わせ、貫通孔を覆うようにアルミニウム溶加材を移行させて、鋼部材を溶融させずにアルミニウム合金部材を溶融し、アルミニウム合金部材に、アルミニウム合金部材と鋼部材との界面から離れるに従って貫通孔の外側に広がる形状のアルミ溶融金属凝固部を形成する方法が記載されている。この方法によると、鋼部材とアルミ溶融金属凝固部との金属間化合物の発生を低減できるため、異種金属材同士の接合強度が向上する。 In Patent Document 1, a steel member and an aluminum alloy member in which a through hole is formed are superimposed, an aluminum filler material is transferred so as to cover the through hole, and the aluminum alloy member is formed without melting the steel member. A method of melting and forming in an aluminum alloy member an aluminum molten metal solidified portion having a shape that expands to the outside of the through-hole as it moves away from the interface between the aluminum alloy member and the steel member is described. According to this method, the generation of intermetallic compounds between the steel member and the solidified portion of the aluminum molten metal can be reduced, so that the bonding strength between dissimilar metal materials is improved.

特許文献2には、アルミニウム合金もしくはマグネシウム合金製の第1の板と鋼製の第2の板との接合に、鋼製の接合補助部材を使用する方法が記載されている。特許文献3には、鋼以外の材料からなる第1の板と鋼製の第2の板との接合に、鋼製の接合補助部材を使用する方法が記載されている。 Patent Literature 2 describes a method of using a steel joining auxiliary member for joining a first plate made of an aluminum alloy or a magnesium alloy and a second plate made of steel. Patent Literature 3 describes a method of using a steel joining auxiliary member for joining a first plate made of a material other than steel and a second plate made of steel.

特開2018-023994号公報JP 2018-023994 A 特開2019-150831号公報JP 2019-150831 A 特開2020-078826号公報JP 2020-078826 A

特許文献1に記載された方法によると、アルミ溶融金属凝固部と鋼部材との界面に金属間化合物が発生することを低減させることができるものの、これらの界面に金属間化合物が発生する。脆い金属間化合物は、鋼部材とアルミニウム合金部材との接合強度を低下させる。また、特許文献2および特許文献3に記載された方法は接合補助部材を使用するが、接合補助部材などの別部材を使用することなく、異種金属材同士の接合強度を向上させることが望ましい。 According to the method described in Patent Document 1, although it is possible to reduce the generation of intermetallic compounds at the interface between the solidified aluminum molten metal and the steel member, intermetallic compounds are generated at these interfaces. A brittle intermetallic compound reduces the bonding strength between a steel member and an aluminum alloy member. Moreover, although the methods described in Patent Documents 2 and 3 use a joining auxiliary member, it is desirable to improve the joint strength between dissimilar metal materials without using a separate member such as a joining auxiliary member.

本発明は、別部材を使用することなく、接合強度が高い異種金属接合体を提供することを目的とする。
また、本発明は、別部材を使用することなく、接合強度が高い異種金属接合体の製造方法を提供することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a dissimilar metal joined body with high joining strength without using a separate member.
Another object of the present invention is to provide a method for manufacturing a dissimilar metal bonded body having high bonding strength without using separate members.

本発明の異種金属接合体は、第1金属材料からなる第1部材と、前記第1部材に重ねて配置され、前記第1金属材料の融点より高い融点の第2金属材料からなる第2部材とを備えた異種金属接合体であり、前記第2部材に、前記第1部材と重なる方向に貫通した貫通孔が形成され、前記貫通孔に存在する部分を有する第1凝固部と、第1凝固部と連続しているとともに前記第1凝固部に対して前記第1部材と反対側に形成された第2凝固部とを有する第3部材を備え、前記第3部材は、第1金属材料の主成分の金属と同じ金属を主成分とする第3金属材料からなり、前記第1凝固部と前記第1部材とが融合しており、前記第2凝固部は、前記第1部材と前記第2部材とが重なる方向について、前記貫通孔と重なる部分と、前記貫通孔と重ならない部分とを有し、前記貫通孔と重ならない部分は、前記第2部材において前記第1部材と反対側の面上に形成され、前記貫通孔と重ならない部分と前記第1部材とが、前記第1部材と前記第2部材とが重なる方向に、前記第2部材を挟んでいる。 A dissimilar metal joined body of the present invention comprises a first member made of a first metal material, and a second member made of a second metal material having a melting point higher than that of the first metal material and disposed so as to overlap the first member. wherein a through hole is formed through the second member in a direction overlapping with the first member, and a first solidified portion having a portion existing in the through hole; A third member having a second solidified portion continuous with the solidified portion and formed on the opposite side of the first solidified portion to the first member, the third member being made of a first metallic material The first solidified portion and the first member are fused together, and the second solidified portion includes the first member and the In the direction in which the second member overlaps, it has a portion overlapping the through hole and a portion not overlapping the through hole, and the portion not overlapping the through hole is the second member on the opposite side of the first member. and the portion that does not overlap the through hole and the first member sandwich the second member in the direction in which the first member and the second member overlap.

第2部材の貫通孔に、第3部材の第1凝固部が存在する。第1凝固部は、第1部材と融合している。第1凝固部は、第1部材に対して動かない。第2部材に対してせん断方向(第2部材の面方向)へ引っ張る力が作用した場合、第2部材の貫通孔に存在する第1凝固部により、第2部材のせん断方向への移動が抑制される。
また、第1部材と第3部材の第2凝固部とが、第1部材と第2部材とが重なる方向について、第2部材を挟んでいる。第2凝固部は、第1凝固部を介して第1部材とつながっている。第2凝固部は、第1部材に対して動かない。第2部材に対して第1部材から剥離させる方向の力が作用した場合、第2凝固部により、第2部材が第1部材から剥離することが抑制される。
上記より、本発明は、引張せん断強度および剥離強度が高い。また、本発明は、接合補助部材といった別部材を使用していない。
したがって、本発明によると、別部材を使用することなく、接続強度が高い異種金属接合体を提供することができる。
The first solidified portion of the third member is present in the through hole of the second member. The first solidified portion is fused with the first member. The first solidified portion does not move relative to the first member. When a pulling force acts on the second member in the shear direction (surface direction of the second member), the movement of the second member in the shear direction is suppressed by the first solidified portion existing in the through hole of the second member. be done.
The second member is sandwiched between the first member and the second solidified portion of the third member in the direction in which the first member and the second member overlap. The second solidified portion is connected to the first member via the first solidified portion. The second solidified portion does not move relative to the first member. When a force acts on the second member in a direction to separate it from the first member, the second solidified portion suppresses separation of the second member from the first member.
As described above, the present invention has high tensile shear strength and peel strength. Moreover, the present invention does not use a separate member such as a joining auxiliary member.
Therefore, according to the present invention, it is possible to provide a dissimilar metal joined body with high connection strength without using a separate member.

また、上記構成において、前記第1金属材料は、アルミニウム合金であってもよい。この場合、前記第2金属材料は、鋼材であってもよい。この場合、前記第3金属材料は、主成分がアルミニウムである金属材料でもよい。 Moreover, in the above configuration, the first metal material may be an aluminum alloy. In this case, the second metal material may be steel. In this case, the third metal material may be a metal material whose main component is aluminum.

上記構成によると、第2部材の鋼材により異種金属接合体の強度を高めつつ、第1部材の軽量なアルミニウム合金により異種金属接合体を軽量化できる。これにより、高強度でありつつ軽量で、且つ、引張せん断強度および剥離強度が高い異種金属接合体を提供することができる。 According to the above configuration, the steel material of the second member increases the strength of the joined body of dissimilar metals, while the lightweight aluminum alloy of the first member makes it possible to reduce the weight of the joined body of dissimilar metals. As a result, it is possible to provide a dissimilar metal joined body having high strength, light weight, and high tensile shear strength and peel strength.

また、上記構成において、複数の前記貫通孔が、離れて形成されていてもよい。複数の前記第3部材が、離れて形成されていてもよい。 Moreover, in the above configuration, the plurality of through holes may be formed apart from each other. A plurality of the third members may be formed separately.

第2部材の貫通孔に第3部材を形成する際、第2部材において貫通孔の周囲に熱が加えられる。第3部材が離れて形成されている場合、第2部材へ熱が加えられる部分が少なくなるため、第2部材への熱の影響(ひずみなど)を低減できる。 When the third member is formed in the through-hole of the second member, heat is applied around the through-hole in the second member. When the third member is formed apart, the portion to which heat is applied to the second member is reduced, so the influence of heat (distortion, etc.) on the second member can be reduced.

また、上記構成において、前記貫通孔は、一方向に長い長孔であってもよい。この場合、前記第1凝固部および前記第2凝固部が、一方向に長くてもよい。 Moreover, the said structure WHEREIN: A long hole long in one direction may be sufficient as the said through-hole. In this case, the first solidified portion and the second solidified portion may be long in one direction.

第1凝固部が長い場合、第2部材がせん断方向により移動しにくい。
第2凝固部が長い場合、第2部材が第1部材からより剥離しにくい。
これらにより、引張せん断強度および剥離強度がより高い異種金属接合体を提供することができる。
When the first solidified portion is long, it is difficult for the second member to move in the shear direction.
When the second solidified portion is long, the second member is more difficult to separate from the first member.
As a result, a dissimilar metal joined body having higher tensile shear strength and peel strength can be provided.

本発明の異種金属接合体の製造方法は、第1金属材料からなる第1部材と、前記第1金属材料の融点より高い融点の第2金属材料からなる第2部材とを備えた異種金属接合体の製造方法であり、
前記第1部材と前記第2部材とを重ね合わせた後、前記第2部材において前記第1部材と重なる方向に貫通した貫通孔およびその周囲に、前記第1金属材料の融点より高く且つ前記第2金属材料の融点より低い温度で溶融した溶融金属を流す工程と、
前記貫通孔およびその周囲に流れた溶融金属を凝固させることにより、前記貫通孔に第1凝固部を形成するとともに、前記第1凝固部に対して前記第1部材と反対側に第2凝固部を形成する工程とを有し、
前記溶融金属は、前記第1金属材料の主成分の金属と同じ金属を主成分とした溶融金属であり、
前記第1凝固部は、前記第1部材と融合しており、
前記第2凝固部は、前記第1部材と前記第2部材とが重なる方向について、前記貫通孔と重なる部分と、前記貫通孔と重ならない部分とを有し、
前記貫通孔と重ならない部分は、前記第2部材において前記第1部材と反対側の面上に形成され、
前記貫通孔と重ならない部分と前記第1部材とが、前記第1部材と前記第2部材とが重なる方向に、前記第2部材を挟んでいる。
A method for manufacturing a joined body of dissimilar metals according to the present invention includes a first member made of a first metal material and a second member made of a second metal material having a melting point higher than that of the first metal material. a method of manufacturing a body,
After the first member and the second member are superimposed on each other, a through-hole penetrated in the second member in a direction overlapping the first member and its surroundings have a melting point higher than the melting point of the first metal material and a melting point of the first metal material. 2 a step of flowing a molten metal melted at a temperature lower than the melting point of the metal material;
A first solidified portion is formed in the through hole by solidifying the molten metal flowing in and around the through hole, and a second solidified portion is formed on the opposite side of the first solidified portion to the first member. and a step of forming
The molten metal is a molten metal whose main component is the same metal as the main component metal of the first metal material,
The first solidified portion is fused with the first member,
The second solidified portion has a portion that overlaps with the through hole and a portion that does not overlap with the through hole in the direction in which the first member and the second member overlap,
A portion that does not overlap with the through hole is formed on the surface of the second member opposite to the first member,
A portion that does not overlap with the through hole and the first member sandwich the second member in a direction in which the first member and the second member overlap.

上記構成によると、別部材を使用することなく、上述した接続強度が高い異種金属接合体を製造することができる。 According to the above configuration, the dissimilar metal joined body having high connection strength can be manufactured without using a separate member.

本発明によると、別部材を使用することなく、引張せん断強度および剥離強度が高い異種金属接合体を提供することができる。
本発明によると、別部材を使用することなく、引張せん断強度および剥離強度が高い異種金属接合体を製造する方法を提供することができる。
According to the present invention, it is possible to provide a dissimilar metal joined body with high tensile shear strength and peel strength without using separate members.
According to the present invention, it is possible to provide a method for producing a dissimilar metal joined body having high tensile shear strength and peel strength without using separate members.

第1実施形態に係る異種金属接合体の平面図である。1 is a plan view of a dissimilar metal joined body according to a first embodiment; FIG. 第1実施形態に係る異種金属接合体の一部断面図(図1のII-II線に沿った断面図)である。1 is a partial cross-sectional view (a cross-sectional view taken along line II-II in FIG. 1) of a dissimilar metal joined body according to the first embodiment; FIG. 第2実施形態に係る異種金属接合体の平面図である。FIG. 5 is a plan view of a dissimilar metal joined body according to a second embodiment;

〔第1実施形態〕
ここでは、本発明の第1実施形態に係る異種金属接合体について、図1および図2を参照しつつ以下に説明する。図1に異種金属接合体100の平面図を示し、図2に図1のII-II線に沿った断面図を示している。
[First embodiment]
Here, a dissimilar metal joined body according to a first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. FIG. 1 shows a plan view of a dissimilar metal joined body 100, and FIG. 2 shows a cross-sectional view taken along line II--II in FIG.

異種金属接合体100は、図1および図2に示すように、第1部材1と、第1部材1に重ねて配置された第2部材2と、第3部材3とを備える。 The dissimilar metal joined body 100 includes a first member 1, a second member 2 placed over the first member 1, and a third member 3, as shown in FIGS.

第1部材1は、図2に示すように、板状の部材である。第1部材1は、第2部材2に対向した第1対向面1Aと、第1対向面1Aと反対側の第1反対面1Bとを有する。 The first member 1 is a plate-like member, as shown in FIG. The first member 1 has a first opposing surface 1A facing the second member 2 and a first opposite surface 1B opposite to the first opposing surface 1A.

第2部材2は、板状の部材である。第2部材2は、第1部材1に対向した第2対向面(対向面)2Aと、第2対向面2Aと反対側の第2反対面(反対面)2Bとを有する。第2部材2には、第1部材1と重なる方向に貫通した貫通孔2hが形成されている。 The second member 2 is a plate-like member. The second member 2 has a second opposing surface (facing surface) 2A facing the first member 1 and a second opposite surface (opposite surface) 2B opposite to the second opposing surface 2A. A through hole 2 h is formed in the second member 2 so as to extend therethrough in a direction overlapping the first member 1 .

貫通孔2hは、図1に示すように、異種金属接合体100の平面視において、略円形状である。図1に示す異種金属接合体100の平面視は、異種金属接合体100を、第1部材1と第2部材2とが重なる方向について、第2部材2側から視た図である。 As shown in FIG. 1, the through hole 2h has a substantially circular shape when the dissimilar metal joined body 100 is viewed from above. The plan view of the joined body 100 of dissimilar metals shown in FIG. 1 is a view of the joined body 100 of dissimilar metals viewed from the second member 2 side in the direction in which the first member 1 and the second member 2 overlap.

第3部材3は、図2に示すように、第1凝固部3Xと、第2凝固部3Yとを有する。図2には、分かりやすいように第1凝固部3Xと第2凝固部3Yとの境界を破線で示しているが、第1凝固部3Xと第2凝固部3Yとの境界は無い。第1凝固部3Xと第2凝固部3Yとは、連続している。 The third member 3, as shown in FIG. 2, has a first solidified portion 3X and a second solidified portion 3Y. In FIG. 2, the boundary between the first solidified portion 3X and the second solidified portion 3Y is indicated by a dashed line for easy understanding, but there is no boundary between the first solidified portion 3X and the second solidified portion 3Y. The first solidified portion 3X and the second solidified portion 3Y are continuous.

第1凝固部3Xは、第2部材2の第2反対面2Bの高さから第1部材1側の部分である。第1凝固部3Xは、第2部材2の貫通孔2hに存在する部分を有する。第1凝固部3Xは、第1部材1と第2部材2とが重なる方向について、貫通孔2hより長くてもよい。図2には、第1凝固部3Xが、第1部材1の第1対向面1Aの高さより第1反対面1B側まで存在する。第1凝固部3Xは、第1部材1の第1反対面1Bの高さまで存在してもよく、第1反対面1Bの高さを超えて(図2中の第1反対面1Bの高さより低い位置まで)存在してもよい。 The first solidified portion 3X is a portion on the first member 1 side from the height of the second opposite surface 2B of the second member 2 . The first solidified portion 3X has a portion existing in the through hole 2h of the second member 2. As shown in FIG. The first solidified portion 3X may be longer than the through hole 2h in the direction in which the first member 1 and the second member 2 overlap. In FIG. 2, the first solidified portion 3X exists from the height of the first opposing surface 1A of the first member 1 to the side of the first opposing surface 1B. The first solidified portion 3X may exist up to the height of the first opposite surface 1B of the first member 1, exceeding the height of the first opposite surface 1B (than the height of the first opposite surface 1B in FIG. 2). down) may be present.

第1凝固部3Xの第1部材1に近い端部は、第1部材1と融合している。本発明における「融合」とは、第1凝固部3Xの端部の成分と第1部材1の成分とが、混じり合っていることである。第1凝固部3Xの端部と第1部材1とは、つながっている。図2には分かりやすいように、第1凝固部3Xの端部と第1部材1との境界を実線で示しているが、第1凝固部3Xの端部と第1部材1との境界が明確である場合もあり、第1凝固部3Xの端部と第1部材1との境界が明確でない場合もある。例えば、第1凝固部3Xの材質と第1部材1の材質が同じ場合、第1凝固部3Xの端部と第1部材1との境界が明確でないことがある。 An end portion of the first solidified portion 3X near the first member 1 is fused with the first member 1 . "Fusion" in the present invention means that the component of the end portion of the first solidified portion 3X and the component of the first member 1 are mixed together. The end of the first solidified portion 3X and the first member 1 are connected. In FIG. 2, the boundary between the end of the first solidified portion 3X and the first member 1 is indicated by a solid line for the sake of clarity. In some cases, the boundary between the end of the first solidified portion 3X and the first member 1 is not clear. For example, when the material of the first solidified portion 3X and the material of the first member 1 are the same, the boundary between the end portion of the first solidified portion 3X and the first member 1 may not be clear.

第2凝固部3Yは、第1凝固部3Xに対して、第1部材1と反対側に形成されている。第2凝固部3Yは、第1部材1と第2部材2とが重なる方向について、貫通孔2hと重なる重複部13aと、貫通孔2hと重ならない非重複部13bとを有する。非重複部13bは、図中の第1凝固部3Xの上に形成されている。非重複部13bは、第2反対面2Bの上に形成されている。図2には分かりやすいように、重複部13aと非重複部13bとの境界を二点鎖線で示しているが、重複部13aと非重複部13bとの境界は無い。重複部13aと非重複部13bとは連続している。非重複部13bは、重複部13aおよび第1凝固部3Xを介して、第1部材1とつながっている。非重複部13bは、第1部材1に対して動かない。 The second solidified portion 3Y is formed on the side opposite to the first member 1 with respect to the first solidified portion 3X. The second solidified portion 3Y has an overlapping portion 13a overlapping the through hole 2h and a non-overlapping portion 13b not overlapping the through hole 2h in the direction in which the first member 1 and the second member 2 overlap. The non-overlapping portion 13b is formed on the first solidified portion 3X in the figure. The non-overlapping portion 13b is formed on the second opposite surface 2B. Although the boundary between the overlapping portion 13a and the non-overlapping portion 13b is indicated by a two-dot chain line in FIG. 2, there is no boundary between the overlapping portion 13a and the non-overlapping portion 13b. The overlapping portion 13a and the non-overlapping portion 13b are continuous. The non-overlapping portion 13b is connected to the first member 1 via the overlapping portion 13a and the first solidified portion 3X. The non-overlapping portion 13b does not move relative to the first member 1. As shown in FIG.

図2に示す異種金属接合体100の断面視において、第2凝固部3Yの厚さは、中央付近から外側に向かって低くなっている。第2凝固部3Yは、図1に示す異種金属接合体100の平面視において、略円形状である。非重複部13bは、重複部13aの周囲に形成されている。非重複部13bは、重複部13aを取り囲んでいる。 In a cross-sectional view of the joined body 100 of dissimilar metals shown in FIG. 2, the thickness of the second solidified portion 3Y decreases from the vicinity of the center toward the outside. The second solidified portion 3Y has a substantially circular shape in plan view of the dissimilar metal joined body 100 shown in FIG. The non-overlapping portion 13b is formed around the overlapping portion 13a. The non-overlapping portion 13b surrounds the overlapping portion 13a.

第2部材2には、図1に示すように、複数の貫通孔2hが離れて形成されている。複数の貫通孔2hは、第2部材2の長手方向に離れていてもよい。複数の貫通孔2hは、第2部材2の長手方向に関係なく、ランダムに離れていてもよい。 As shown in FIG. 1, the second member 2 is formed with a plurality of through holes 2h. The plurality of through holes 2 h may be separated in the longitudinal direction of the second member 2 . The plurality of through holes 2h may be separated randomly regardless of the longitudinal direction of the second member 2. As shown in FIG.

第2凝固部3Yを有する第3部材3は、離れて形成されている。複数の第3部材3は、第2部材2の長手方向に離れていてもよい。複数の第3部材3は、第2部材2の長手方向に関係なく、ランダムに離れていてもよい。 The third member 3 having the second solidified portion 3Y is formed apart. The multiple third members 3 may be separated in the longitudinal direction of the second member 2 . The plurality of third members 3 may be separated randomly regardless of the longitudinal direction of the second member 2 .

次に、第1部材1の材質、第2部材2の材質および第3部材3の材質について説明する。 Next, the material of the first member 1, the material of the second member 2, and the material of the third member 3 will be described.

第1部材1は、第1金属材料からなる(図2参照)。第2部材2は、第1部材1の融点より高い融点の第2金属材料からなる。本発明において、「金属材料」とは、例えば、金属でもよく、金属間化合物でもよく、合金でもよい。本発明において、「金属材料」は、1種類の金属でもよい。この場合、「金属材料」は、金属に加え、非金属を含んでいてもよく、非金属を含んでいなくてもよい。本発明において、「金属材料」は、金属間化合物でもよい。金属間化合物とは、2種類以上の金属からなる化合物であり、元の金属と異なる結晶構造を有する化合物である。金属間化合物に、非金属が含まれていてもよく、非金属が含まれていなくてもよい。本発明において、「金属材料」は、1種類の金属を含む合金でもよく、2種類以上の金属を含む合金でもよい。合金に、非金属が含まれていてもよく、非金属が含まれていなくてもよい。
上述した非金属は、例えば、ある特性を高めるために含まれていてもよく、不可避不純物などとして含まれていてもよい。
The first member 1 is made of a first metal material (see FIG. 2). The second member 2 is made of a second metal material having a melting point higher than that of the first member 1 . In the present invention, the “metal material” may be, for example, a metal, an intermetallic compound, or an alloy. In the present invention, the "metal material" may be one type of metal. In this case, the "metal material" may or may not contain non-metals in addition to metals. In the present invention, the "metallic material" may be an intermetallic compound. An intermetallic compound is a compound composed of two or more kinds of metals and has a crystal structure different from that of the original metal. The intermetallic compound may or may not contain nonmetals. In the present invention, the “metal material” may be an alloy containing one kind of metal or an alloy containing two or more kinds of metals. The alloy may or may not contain non-metals.
The non-metals described above may be contained, for example, to enhance certain properties, or may be contained as unavoidable impurities.

第1部材1の材質および第2部材2の材質は、上記を満たす限り、特定の材質に限定されない。例えば、第1部材1の材質が、純アルミニウムまたはアルミニウム合金でもよい。第2部材2の材質が、鋼材でもよい。 The material of the first member 1 and the material of the second member 2 are not limited to specific materials as long as the above conditions are satisfied. For example, the material of the first member 1 may be pure aluminum or an aluminum alloy. The material of the second member 2 may be steel.

純アルミニウムとは、アルミニウム及び不可避不純物からなる材料である。
アルミニウム合金は、特に限定されるものではない。アルミニウム合金として、例えば、アルミニウム-銅系合金(Al-Cu系合金)、アルミニウム-マンガン系合金(Al-Mn系合金)、アルミニウム-ケイ素系合金(Al-Si系合金)、アルミニウム-マグネシウム系合金(Al-Mg系合金)、アルミニウム-ジルコニウム系合金(Al-Zr系合金)アルミニウム-マグネシウム-ケイ素系合金(Al-Mg-Si系合金)、アルミニウム-亜鉛-マグネシウム系合金(Al-Zn-Mg系合金)、アルミニウム-亜鉛-マグネシウム-銅系合金(Al-Zn-Mg-Cu系合金)、アルミニウム-鉄-ジルコニウム系合金(Al-Fe-Zr系合金)が挙げられる。上記の例として、例えば、JIS A1000系、2000系、3000系、4000系、5000系が挙げられる。アルミニウム合金は、不可避不純物を含んでいてもよい。
Pure aluminum is a material consisting of aluminum and unavoidable impurities.
The aluminum alloy is not particularly limited. Examples of aluminum alloys include aluminum-copper-based alloys (Al-Cu-based alloys), aluminum-manganese-based alloys (Al-Mn-based alloys), aluminum-silicon-based alloys (Al-Si-based alloys), and aluminum-magnesium-based alloys. (Al-Mg-based alloy), aluminum-zirconium-based alloy (Al-Zr-based alloy), aluminum-magnesium-silicon-based alloy (Al-Mg-Si-based alloy), aluminum-zinc-magnesium-based alloy (Al-Zn-Mg alloys), aluminum-zinc-magnesium-copper alloys (Al-Zn-Mg-Cu alloys), and aluminum-iron-zirconium alloys (Al-Fe-Zr alloys). Examples of the above include JIS A1000 series, 2000 series, 3000 series, 4000 series, and 5000 series. The aluminum alloy may contain unavoidable impurities.

鋼材は、特に限定されるものではない。鋼材として、例えば、ステンレス鋼、SPCC(冷間圧延鋼板(JIS G 3141))を使用してもよい。 The steel material is not particularly limited. As the steel material, for example, stainless steel and SPCC (cold-rolled steel plate (JIS G 3141)) may be used.

第3部材3は、第1金属材料の主成分の金属と同じ金属を主成分とする第3金属材料からなる。この「金属材料」は、上述した本発明の「金属材料」と同様である。第1金属材料の主成分の金属とは、例えば、第1部材1に70%以上含まれる金属である。第3部材3の主成分の金属とは、例えば、第3部材3に90%以上含まれる金属である。第1部材1の主成分の金属と第3部材3の主成分の金属とが同じであることにより、異種金属接合体100の製造工程において、第1部材1と、第3部材3の第1凝固部3Xとが融合する。 The third member 3 is made of a third metal material whose main component is the same metal as the main component of the first metal material. This "metal material" is the same as the "metal material" of the present invention described above. The metal that is the main component of the first metal material is, for example, a metal contained in the first member 1 by 70% or more. The metal that is the main component of the third member 3 is, for example, a metal that is contained in the third member 3 by 90% or more. Since the main component metal of the first member 1 and the main component metal of the third member 3 are the same, in the manufacturing process of the dissimilar metal joined body 100, the first member 1 and the first It fuses with the solidified portion 3X.

第3部材3の材質は、上記を満たす限り、特定の材質に限定されない。例えば、第1部材1の第1金属材料が純アルミニウムまたはアルミニウム合金である場合、純アルミニウムおよびアルミニウム合金の主成分はアルミニウム原子であることから、第3部材3の第3金属材料は、アルミニウム原子を主成分とするアルミニウムまたはアルミニウム合金である。第1部材1の材質と第3部材3の材質とは、同じでもよく、異なってもよい。 The material of the third member 3 is not limited to a specific material as long as the above is satisfied. For example, when the first metal material of the first member 1 is pure aluminum or aluminum alloy, the main component of pure aluminum and aluminum alloy is aluminum atoms, so the third metal material of the third member 3 is aluminum atoms. is an aluminum or aluminum alloy containing as a main component. The material of the first member 1 and the material of the third member 3 may be the same or different.

次に、異種金属接合体100の製造方法を説明する。 Next, a method for manufacturing the dissimilar metal joined body 100 will be described.

図2に示すように、第1部材1と第2部材2とを重ね合わせる。第1部材1の第1金属材料の融点より高く且つ第2部材2の第2金属材料の融点より低い温度で溶融させた溶融金属を、第2部材2の貫通孔2hおよびその周囲(第2部材2の第2反対面2B上)に流す。溶融金属は、第1部材1の第1金属材料の主成分である金属と同じ金属を主成分とするものである。溶融金属を流す方法は、特に限定されない。例えば、アーク溶接により、第2部材2の貫通孔2hおよびその周囲に溶融金属を流してもよい。 As shown in FIG. 2, the first member 1 and the second member 2 are overlapped. The molten metal melted at a temperature higher than the melting point of the first metal material of the first member 1 and lower than the melting point of the second metal material of the second member 2 is poured into the through hole 2h of the second member 2 and its surroundings (second on the second opposite surface 2B of the member 2). The molten metal has the same metal as the main component of the first metal material of the first member 1 as its main component. The method of flowing the molten metal is not particularly limited. For example, arc welding may be used to flow molten metal through the through hole 2h of the second member 2 and its periphery.

溶融金属を貫通孔2hに流すことにより、第1部材1において溶融金属と接した部分およびその周囲が溶融する。第1部材1の溶融した部分と溶融金属とが混ざり合う。第1部材1の溶融した部分と溶融金属とは混ざり合った状態で凝固する。 By flowing the molten metal through the through hole 2h, the portion of the first member 1 that is in contact with the molten metal and its surroundings are melted. The melted portion of the first member 1 and the molten metal are mixed. The molten portion of the first member 1 and the molten metal are mixed and solidified.

溶融金属が凝固することにより、貫通孔2hに第1凝固部3Xが形成されるとともに、第1凝固部3Xに対して第1部材1と反対側に第2凝固部3Yが形成される。第1凝固部3Xの第1部材1に近い端部と、第1部材1とは、融合している。第2凝固部3Yの重複部13aは、第1凝固部3Xの上に形成されている。第2凝固部3Yの非重複部13bは、第2部材2の第2反対面2Bの上に形成されている。非重複部13bと第1部材1とは、第1部材1と第2部材2とが重なる方向に、第2部材2を挟んでいる。 By solidifying the molten metal, a first solidified portion 3X is formed in the through hole 2h, and a second solidified portion 3Y is formed on the side opposite to the first member 1 with respect to the first solidified portion 3X. The end of the first solidified portion 3X near the first member 1 and the first member 1 are fused. The overlapping portion 13a of the second solidified portion 3Y is formed on the first solidified portion 3X. The non-overlapping portion 13b of the second solidified portion 3Y is formed on the second opposite surface 2B of the second member 2. As shown in FIG. The non-overlapping portion 13b and the first member 1 sandwich the second member 2 in the direction in which the first member 1 and the second member 2 overlap.

上記方法によって製造された異種金属接合体100によると、以下の効果が得られる。 According to the dissimilar metal joined body 100 manufactured by the above method, the following effects are obtained.

図2に示すように、第2部材2の貫通孔2hに、第3部材3の第1凝固部3Xが存在する。第1凝固部3Xは、第1部材1と融合している。第1凝固部3Xは、第1部材1に対して動かない。第2部材2に対してせん断方向(第2部材の面方向)へ引っ張る力が作用した場合、第2部材2の貫通孔2hに存在する第1凝固部3Xにより、第2部材2のせん断方向への移動が抑制される。 As shown in FIG. 2, the first solidified portion 3X of the third member 3 exists in the through hole 2h of the second member 2. As shown in FIG. The first solidified portion 3X is fused with the first member 1 . The first solidified portion 3X does not move with respect to the first member 1 . When a pulling force acts on the second member 2 in the shearing direction (surface direction of the second member), the first solidified portion 3X existing in the through hole 2h of the second member 2 causes the second member 2 to move in the shearing direction. movement is inhibited.

第1部材1と第2凝固部3Yの非重複部13bとが、第1部材1と第2部材2とが重なる方向について、第2部材2を挟でいる。非重複部13bは、重複部13aおよび第1凝固部3Xを介して第1部材1とつながっている。非重複部13bは、第1部材1に対して動かない。第2部材2に対して第1部材1から剥離させる方向の力が作用した場合、非重複部13bにより、第2部材2が第1部材1から剥離することが抑制される。 The first member 1 and the non-overlapping portion 13b of the second solidified portion 3Y sandwich the second member 2 in the direction in which the first member 1 and the second member 2 overlap. The non-overlapping portion 13b is connected to the first member 1 via the overlapping portion 13a and the first solidified portion 3X. The non-overlapping portion 13b does not move relative to the first member 1. As shown in FIG. When a force acts on the second member 2 in a direction to separate it from the first member 1 , the non-overlapping portion 13 b prevents the second member 2 from separating from the first member 1 .

上記より、第2部材2の引張せん断強度および剥離強度が高い。また、異種金属接合体100には、接合補助部材といった別部材を使用していない。
したがって、本実施形態に係る異種金属接合体100は、別部材を使用することなく、接続強度が高い異種金属接合体である。
As described above, the tensile shear strength and peel strength of the second member 2 are high. Further, the dissimilar metal joined body 100 does not use a separate member such as a joining auxiliary member.
Therefore, the dissimilar metal joined body 100 according to the present embodiment is a dissimilar metal joined body with high connection strength without using separate members.

本実施形態に係る異種金属接合体100は、建物、乗物など様々な用途に使用可能である。例えば、異種金属接合体100を自動車および鉄道車両などの乗物に使用してもよい。 The dissimilar metal joined body 100 according to this embodiment can be used for various purposes such as buildings and vehicles. For example, the dissimilar metal joint 100 may be used in vehicles such as automobiles and railroad vehicles.

第1部材1の材質および第2部材2の材質は特に限定されないが、例えば、第1部材1をアルミニウム合金とし、第2部材2を鋼材とした場合、第2部材2の鋼材により異種金属接合体100の強度を高めつつ、第1部材1のアルミニウム合金により軽量化を図ることができる。アルミニウム合金と鋼材を直接溶接で接合した場合、これらの界面に金属間化合物が生成するため、接合強度が低くなるが、上記構成によると、高強度でありつつ軽量で、且つ、引張せん断強度および剥離強度が高い異種金属接合体100を提供することができる。第1部材1がアルミニウム合金である場合、第3部材3は、アルミニウムを主成分とする純アルミニウムまたはアルミニウム合金であることが好ましい。これにより、第1部材1と第3部材3の第1凝固部Xが融合しやすい(図2参照)。 The material of the first member 1 and the material of the second member 2 are not particularly limited. While increasing the strength of the body 100, the aluminum alloy of the first member 1 can reduce the weight. When an aluminum alloy and a steel material are directly welded, an intermetallic compound is formed at the interface between them, resulting in a lower bonding strength. A dissimilar metal joined body 100 having high peel strength can be provided. When the first member 1 is an aluminum alloy, the third member 3 is preferably pure aluminum or an aluminum alloy containing aluminum as a main component. This facilitates fusion of the first solidified portions X of the first member 1 and the third member 3 (see FIG. 2).

また、本実施形態では、図1に示すように、第2部材2に、複数の貫通孔2hが、離れて形成されている。第3部材3が、離れて形成されている。第3部材3を形成するために貫通孔2hに溶融金属を流したとき、第2部材2に熱が加えられるが、本実施形態では、貫通孔2h同士が離れているため、第2部材2への熱の影響(ひずみなど)を低減できる。 Moreover, in this embodiment, as shown in FIG. 1, the second member 2 is formed with a plurality of through holes 2h. A third member 3 is formed apart. When the molten metal is poured into the through holes 2h to form the third member 3, the second member 2 is heated. It is possible to reduce the thermal influence (such as distortion) on the

〔第2実施形態〕
次に、本発明の第2実施形態について、図3を参照しつつ説明する。第2実施形態において第1実施形態と異なる点は、(1)第2部材202の貫通孔202hの形状、および、(2)第3部材203の形状である。なお、上述した第1実施形態と同一の構成については同一の符号を用い、その説明を適宜省略する。
[Second embodiment]
Next, a second embodiment of the invention will be described with reference to FIG. The difference between the second embodiment and the first embodiment is (1) the shape of the through hole 202 h of the second member 202 and (2) the shape of the third member 203 . In addition, the same code|symbol is used about the structure same as 1st Embodiment mentioned above, and the description is abbreviate|omitted suitably.

図3に、異種金属接合体200の平面図を示している。図3に示すように、第2部材202に、貫通孔202hが形成されている。貫通孔202hは、一方向に長い長孔である。貫通孔202hは、第2部材202の長手方向に長くてもよい。貫通孔202hは、第2部材202の長手方向に交差する方向に長くてもよい。 FIG. 3 shows a plan view of the dissimilar metal joined body 200. As shown in FIG. As shown in FIG. 3, the second member 202 is formed with a through hole 202h. The through hole 202h is an elongated hole elongated in one direction. The through hole 202 h may be long in the longitudinal direction of the second member 202 . The through hole 202h may be long in a direction crossing the longitudinal direction of the second member 202. As shown in FIG.

図3に、第3部材203の第2凝固部203Yを示している。図3に示す平面図は、第1部材201と第2部材202とが重なる方向について、異種金属接合体200を第2部材202側から視た図である。第2凝固部203Yは、異種金属接合体200の平面視において、貫通孔202hと重複した重複部213aと、貫通孔202hと重複していない非重複部213bとを有する。非重複部213bは、第2部材202の第2反対面202Bの上に形成されている。 FIG. 3 shows the second solidified portion 203Y of the third member 203. As shown in FIG. The plan view shown in FIG. 3 is a view of the dissimilar metal joined body 200 viewed from the second member 202 side in the direction in which the first member 201 and the second member 202 overlap. The second solidified portion 203Y has an overlapping portion 213a that overlaps the through hole 202h and a non-overlapping portion 213b that does not overlap the through hole 202h when the dissimilar metal joined body 200 is viewed from above. The non-overlapping portion 213b is formed on the second opposite surface 202B of the second member 202. As shown in FIG.

異種金属接合体200の平面視において、重複部213aの奥に、図示しない第1凝固部203Xが存在する。第1凝固部203X(図示せず)は、貫通孔202hに存在する。第1凝固部203X(図示せず)と図3に示す第2凝固部203Yとは、連続している。 In a plan view of the joined body of dissimilar metals 200, a first solidified portion 203X (not shown) exists behind the overlapping portion 213a. A first solidified portion 203X (not shown) exists in the through hole 202h. The first solidified portion 203X (not shown) and the second solidified portion 203Y shown in FIG. 3 are continuous.

第1凝固部203X(図示せず)は、貫通孔202hと同じ方向に長い。第2凝固部203Yの重複部213aおよび非重複部213bは、貫通孔202hと同じ方向に長い。 The first solidified portion 203X (not shown) is long in the same direction as the through hole 202h. The overlapping portion 213a and the non-overlapping portion 213b of the second solidified portion 203Y are long in the same direction as the through hole 202h.

第1部材201の材質、第2部材202の材質および第3部材203の材質は、第1実施形態の第1部材1(図示せず)の材質、第2部材202の材質および第3部材203の材質と同様である。第1部材201の材質、第2部材202の材質および第3部材203の材質として、例えば、第1実施形態で例示した第1部材1、第2部材2および第3部材3の材質を採用してもよい。 The material of the first member 201, the material of the second member 202 and the material of the third member 203 are the same as the material of the first member 1 (not shown), the material of the second member 202 and the third member 203 of the first embodiment. is the same as the material of As the material of the first member 201, the material of the second member 202, and the material of the third member 203, for example, the materials of the first member 1, the second member 2, and the third member 3 illustrated in the first embodiment are adopted. may

第2実施形態に係る異種金属接合体200によると、第1実施形態に係る異種金属接合体100と同様に、貫通孔202hに存在する図示しない第1凝固部203Xにより、第2部材202がせん断方向に移動することが抑制される。また、第2凝固部203Yの非重複部213bにより、第2部材202が第1部材201から剥離されることが抑制される。したがって、別部材を使用することなく、接続強度が高い異種金属接合体200を提供することができる。 According to the joined body of dissimilar metals 200 according to the second embodiment, as in the joined body of dissimilar metals 100 according to the first embodiment, the second member 202 is sheared by the first solidified portion 203X (not shown) existing in the through hole 202h. Movement in the direction is suppressed. In addition, separation of the second member 202 from the first member 201 is suppressed by the non-overlapping portion 213b of the second solidified portion 203Y. Therefore, the dissimilar metal joined body 200 with high connection strength can be provided without using a separate member.

また、貫通孔202hに存在する図示しない第1凝固部203Xが、一方向に長いため、第2部材202が、せん断方向に、より移動しにくい。また、第2凝固部203Yの非重複部213bが一方向に長いため、第2部材2が第1部材1から、より剥離しにくい。
上記より、引張せん断強度および剥離強度がより高い異種金属接合体200を提供することができる。
In addition, since the first solidified portion 203X (not shown) present in the through hole 202h is long in one direction, the second member 202 is less likely to move in the shear direction. In addition, since the non-overlapping portion 213b of the second solidified portion 203Y is long in one direction, the second member 2 is more difficult to separate from the first member 1 .
As described above, the dissimilar metal joined body 200 having higher tensile shear strength and peel strength can be provided.

以上、本発明の実施形態について図面に基づいて説明したが、具体的な構成は、これらの実施形態に限定されるものでないと考えられるべきである。本発明の範囲は上記した説明ではなく特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれる。 Although the embodiments of the present invention have been described above with reference to the drawings, it should be considered that the specific configuration is not limited to these embodiments. The scope of the present invention is indicated by the scope of the claims rather than the above description, and includes all modifications within the scope and meaning equivalent to the scope of the claims.

例えば、上述の第1実施形態において、図1に示すように、異種金属接合体100の平面視において、第2部材2に形成された貫通孔2hは、略円形状である。異種金属接合体100の平面視において、貫通孔2hに存在する第1凝固部3Xと、第2凝固部3Yとは、略円形状である。
上述の第2実施形態において、図3に示すように、異種金属接合体200の平面視において、第2部材202に形成された貫通孔202hは、一方向に長い長孔である。異種金属接合体100の平面視において、貫通孔202hに存在する第1凝固部203X(図示せず)と、第2凝固部203Yとは、一方向に長い。
しかし、第2部材の貫通孔の形状、貫通孔に存在する第1凝固部の形状、および、第2凝固部の形状は、上記に限定されない。第2部材の貫通孔は、例えば、多角形状でもよく、曲がっていてもよい。
For example, in the above-described first embodiment, as shown in FIG. 1, the through hole 2h formed in the second member 2 has a substantially circular shape in plan view of the joined article 100 of dissimilar metals. In a plan view of the joined body of dissimilar metals 100, the first solidified portion 3X and the second solidified portion 3Y existing in the through hole 2h are substantially circular.
In the above-described second embodiment, as shown in FIG. 3, in plan view of the joined body of dissimilar metals 200, the through hole 202h formed in the second member 202 is an elongated hole elongated in one direction. In a plan view of the joined body of dissimilar metals 100, the first solidified portion 203X (not shown) and the second solidified portion 203Y existing in the through hole 202h are elongated in one direction.
However, the shape of the through hole of the second member, the shape of the first solidified portion present in the through hole, and the shape of the second solidified portion are not limited to the above. The through-hole of the second member may be polygonal or curved, for example.

また、上述の第1実施形態において、図1に示すように、第2凝固部3Yの非重複部13bは、重複部13aを取り囲んでいる。上述の第2実施形態において、図3に示すように、第2凝固部203Yの非重複部213bは、重複部213aを取り囲んでいる。しかし、第2凝固部の非重複部は、重複部を取り囲んでいなくてもよい。非重複部が、重複部の周囲に、部分的に形成されていてもよい。第2凝固部、重複部および非重複部の形状は、限定されない。 Moreover, in the first embodiment described above, as shown in FIG. 1, the non-overlapping portion 13b of the second solidified portion 3Y surrounds the overlapping portion 13a. In the second embodiment described above, as shown in FIG. 3, the non-overlapping portion 213b of the second solidified portion 203Y surrounds the overlapping portion 213a. However, the non-overlapping portion of the second solidified portion does not have to surround the overlapping portion. A non-overlapping portion may be partially formed around the overlapping portion. The shapes of the second solidified portion, overlapping portion and non-overlapping portion are not limited.

また、上述の第1実施形態では、図2に示す異種金属接合体100の断面視において、第2凝固部3Yの厚さが、中央付近から外側に向かって厚さが低くなっている。しかし、第2凝固部3Yの厚さは、全て同じでもよく、中央付近から外側に向かって厚くなってもよい。 Further, in the first embodiment described above, in the cross-sectional view of the joined body 100 of dissimilar metals shown in FIG. 2, the thickness of the second solidified portion 3Y decreases from the vicinity of the center toward the outside. However, the thickness of the second solidified portion 3Y may be the same throughout, or may increase from the vicinity of the center toward the outside.

また、上述の第1実施形態において、図1に示すように、第1部材1は第2部材2よりやや大きい。第2実施形態において、図3に示すように、第1部材201は第2部材202よりやや大きい。しかし、第1部材と第2部材の大きさの大小は限定されない。例えば、第1部材が第2部材より小さくてもよい。第1部材と第2部材とが同じ大きさでもよい。第1部材と第2部材の形状、大きさ、厚さなどは変更可能である。 Also, in the first embodiment described above, the first member 1 is slightly larger than the second member 2, as shown in FIG. In a second embodiment, the first member 201 is slightly larger than the second member 202, as shown in FIG. However, the sizes of the first member and the second member are not limited. For example, the first member may be smaller than the second member. The first member and the second member may have the same size. The shape, size, thickness, etc. of the first member and the second member can be changed.

また、上述の第1実施形態および第2実施形態において、異種金属接合体に別の部材が重ね合わされていてもよい。例えば、図2に示す第1部材1の第1反対面1Bに、他の部材が重ね合わされていてもよい。 Further, in the above-described first and second embodiments, another member may be superimposed on the dissimilar metal joined body. For example, another member may be superimposed on the first opposite surface 1B of the first member 1 shown in FIG.

1、201 第1部材
1A 第1対向面
1B 第1反対面
2、202 第2部材
2h、202h 貫通孔
2A 第2対向面(対向面)
2B、202B 第2反対面(反対面)
3 第3部材
3X 第1凝固部
3Y、203Y 第2凝固部
13a、213a 重複部
13b、213b 非重複部
100、200 異種金属接合体
1, 201 first member 1A first opposing surface 1B first opposing surface 2, 202 second member 2h, 202h through hole 2A second opposing surface (opposing surface)
2B, 202B second opposite surface (opposite surface)
3 Third member 3X First solidified portion 3Y, 203Y Second solidified portion 13a, 213a Overlapping portion 13b, 213b Non-overlapping portion 100, 200 Dissimilar metal joined body

Claims (5)

第1金属材料からなる第1部材と、前記第1部材に重ねて配置され、前記第1金属材料の融点より高い融点の第2金属材料からなる第2部材とを備えた異種金属接合体であり、
前記第2部材に、前記第1部材と重なる方向に貫通した貫通孔が形成され、
前記貫通孔に存在する部分を有する第1凝固部と、第1凝固部と連続しているとともに前記第1凝固部に対して前記第1部材と反対側に形成された第2凝固部とを有する第3部材を備え、
前記第3部材は、第1金属材料の主成分の金属と同じ金属を主成分とする第3金属材料からなり、
前記第1凝固部と前記第1部材とが融合しており、
前記第2凝固部は、前記第1部材と前記第2部材とが重なる方向について、前記貫通孔と重なる部分と、前記貫通孔と重ならない部分とを有し、
前記貫通孔と重ならない部分は、前記第2部材において前記第1部材と反対側の面上に形成され、
前記貫通孔と重ならない部分と前記第1部材とが、前記第1部材と前記第2部材とが重なる方向に、前記第2部材を挟んでいることを特徴とする異種金属接合体。
A joined body of dissimilar metals, comprising: a first member made of a first metal material; and a second member disposed over the first member and made of a second metal material having a melting point higher than that of the first metal material can be,
A through-hole is formed in the second member in a direction overlapping the first member,
a first solidified portion having a portion existing in the through hole; and a second solidified portion continuous with the first solidified portion and formed on the opposite side of the first solidified portion to the first member. a third member having
The third member is made of a third metal material whose main component is the same metal as the main component metal of the first metal material,
The first solidified portion and the first member are fused,
The second solidified portion has a portion that overlaps with the through hole and a portion that does not overlap with the through hole in the direction in which the first member and the second member overlap,
A portion that does not overlap with the through hole is formed on the surface of the second member opposite to the first member,
A joined body of dissimilar metals, wherein a portion that does not overlap with the through hole and the first member sandwich the second member in a direction in which the first member and the second member overlap.
前記第1金属材料は、アルミニウム合金であり、
前記第2金属材料は、鋼材であり、
前記第3金属材料の主成分がアルミニウムであることを特徴とする請求項1に記載の異種金属接合体。
The first metal material is an aluminum alloy,
The second metal material is steel,
2. A dissimilar metal bonded article according to claim 1, wherein the main component of said third metal material is aluminum.
複数の前記貫通孔が離れて形成され、
複数の前記第3部材が離れて形成されていることを特徴とする請求項1または2に記載の異種金属接合体。
a plurality of the through holes are formed apart,
3. The dissimilar metal joined article according to claim 1, wherein a plurality of said third members are formed apart from each other.
前記貫通孔は、一方向に長い長孔であり、
前記第1凝固部および前記第2凝固部が、一方向に長いことを特徴とする請求項1または2に記載の異種金属接合体。
The through-hole is an elongated hole that is long in one direction,
3. The dissimilar metal joined article according to claim 1, wherein said first solidified portion and said second solidified portion are long in one direction.
第1金属材料からなる第1部材と、前記第1金属材料の融点より高い融点の第2金属材料からなる第2部材とを備えた異種金属接合体の製造方法であり、
前記第1部材と前記第2部材とを重ね合わせた後、前記第2部材において前記第1部材と重なる方向に貫通した貫通孔およびその周囲に、前記第1金属材料の融点より高く且つ前記第2金属材料の融点より低い温度で溶融した溶融金属を流す工程と、
前記貫通孔およびその周囲に流れた溶融金属を凝固させることにより、前記貫通孔に第1凝固部を形成するとともに、前記第1凝固部に対して前記第1部材と反対側に第2凝固部を形成する工程とを有し、
前記溶融金属は、前記第1金属材料の主成分の金属と同じ金属を主成分とした溶融金属であり、
前記第1凝固部は、前記第1部材と融合しており、
前記第2凝固部は、前記第1部材と前記第2部材とが重なる方向について、前記貫通孔と重なる部分と、前記貫通孔と重ならない部分とを有し、
前記貫通孔と重ならない部分は、前記第2部材において前記第1部材と反対側の面上に形成され、
前記貫通孔と重ならない部分と前記第1部材とが、前記第1部材と前記第2部材とが重なる方向に、前記第2部材を挟んでいることを特徴とする異種金属接合体の製造方法。
A method for manufacturing a dissimilar metal bonded body, comprising a first member made of a first metal material and a second member made of a second metal material having a melting point higher than the melting point of the first metal material,
After the first member and the second member are superimposed on each other, a through-hole penetrated in the second member in a direction overlapping the first member and its surroundings have a melting point higher than the melting point of the first metal material and a melting point of the first metal material. 2 a step of flowing a molten metal melted at a temperature lower than the melting point of the metal material;
A first solidified portion is formed in the through hole by solidifying the molten metal flowing in and around the through hole, and a second solidified portion is formed on the opposite side of the first solidified portion to the first member. and a step of forming
The molten metal is a molten metal whose main component is the same metal as the main component metal of the first metal material,
The first solidified portion is fused with the first member,
The second solidified portion has a portion that overlaps with the through hole and a portion that does not overlap with the through hole in the direction in which the first member and the second member overlap,
A portion that does not overlap with the through hole is formed on the surface of the second member opposite to the first member,
A method for manufacturing a dissimilar metal bonded body, wherein a portion that does not overlap with the through hole and the first member sandwich the second member in a direction in which the first member and the second member overlap. .
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7473697B1 (en) 2023-01-25 2024-04-23 株式会社神戸製鋼所 Arc welding method for joining dissimilar materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7473697B1 (en) 2023-01-25 2024-04-23 株式会社神戸製鋼所 Arc welding method for joining dissimilar materials

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