JP6091304B2 - Resistance welding method and joining member obtained thereby - Google Patents
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Description
本発明は、抵抗溶接方法及びそれにより得られる接合部材に関する。 The present invention relates to a resistance welding method and a joining member obtained thereby.
従来、鋼等の鉄系金属部材とアルミニウム合金等のアルミニウム系金属部材とを抵抗溶接により直接接合すると、両金属部材の間にＦｅ２Ａｌ５等のＦｅ−Ａｌ金属間化合物が形成されることが知られている。ところが、前記Ｆｅ−Ａｌ金属間化合物は非常に脆いため、両金属部材に対し互いに剥離する方向に力を加えると該Ｆｅ−Ａｌ金属間化合物が容易に破壊されるという問題がある。 Conventionally, when an iron-based metal member such as steel and an aluminum-based metal member such as an aluminum alloy are directly joined by resistance welding, an Fe—Al intermetallic compound such as Fe 2 Al 5 is formed between the two metal members. It has been known. However, since the Fe—Al intermetallic compound is very fragile, there is a problem that the Fe—Al intermetallic compound is easily broken when a force is applied to the two metal members in the direction of peeling from each other.
そこで、亜鉛メッキ層が施された鋼等の鉄系金属部材と、亜鉛メッキ層が施されたアルミニウム合金等のアルミニウム系金属部材とを抵抗溶接により接合する際に、両金属部材の間に亜鉛箔等を介在させ、亜鉛層を介して接合する方法が知られている（例えば、特許文献１参照）。 Therefore, when joining an iron-based metal member such as steel with a galvanized layer and an aluminum-based metal member such as an aluminum alloy with a galvanized layer by resistance welding, zinc is placed between the two metal members. A method is known in which a foil or the like is interposed and bonded via a zinc layer (see, for example, Patent Document 1).
しかしながら、前記従来の抵抗溶接方法では、前記各金属部材の亜鉛メッキ層が前記亜鉛箔由来の亜鉛と接合されているに過ぎない。従って、前記両金属部材に対し互いに剥離する方向に力を加えると、前記鉄系金属部材の母材と前記亜鉛メッキ層との間で容易に剥離が生じ、十分な接合強度を得ることができないという不都合がある。 However, in the conventional resistance welding method, the galvanized layer of each metal member is merely joined with zinc derived from the zinc foil. Therefore, if a force is applied to the two metal members in the direction of peeling from each other, peeling easily occurs between the base metal of the iron-based metal member and the galvanized layer, and sufficient bonding strength cannot be obtained. There is an inconvenience.
本発明は、かかる不都合を解消して、鉄系金属部材とアルミニウム系金属部材との間で優れた接合強度を得ることができる抵抗溶接方法及び該抵抗溶接方法により得られる接合部材を提供することを目的とする。 The present invention eliminates such inconveniences and provides a resistance welding method capable of obtaining excellent joint strength between an iron-based metal member and an aluminum-based metal member, and a joint member obtained by the resistance welding method. With the goal.
かかる目的を達成するために、本発明は、鉄系金属部材とアルミニウム系金属部材とを抵抗溶接により接合する抵抗溶接方法において、少なくとも接合予定部の該鉄系金属部材の母材と該アルミニウム系金属部材との間にＺｎ−Ｓｉ合金からなるロウ材を配置する工程と、該鉄系金属部材と該アルミニウム系金属部材とを、該接合予定部を除く部分で、亜鉛メッキ層を介して積層する工程と、少なくとも該鉄系金属部材に通電することにより、各金属部材及び該ロウ材を溶融させて接合部を形成する工程とを備えることを特徴とする。 In order to achieve such an object, the present invention provides a resistance welding method for joining an iron-based metal member and an aluminum-based metal member by resistance welding, and at least a base material of the iron-based metal member of the portion to be joined and the aluminum-based metal member. Laminating a brazing material composed of a Zn-Si alloy between the metal member and the iron-based metal member and the aluminum-based metal member are laminated via a galvanized layer at a portion excluding the portion to be joined. And a step of melting each metal member and the brazing material to form a joint by energizing at least the iron-based metal member.
本発明の抵抗溶接方法では、まず、少なくとも接合予定部の前記鉄系金属部材の母材と前記アルミニウム系金属部材との間にＺｎ−Ｓｉ合金からなるロウ材を配置する。そして、前記鉄系金属部材と前記アルミニウム系金属部材とを、前記接合予定部を除く部分で、亜鉛メッキ層を介して積層する。 In the resistance welding method of the present invention, first, a brazing material made of a Zn—Si alloy is disposed at least between the base metal of the iron-based metal member and the aluminum-based metal member at a part to be joined. And the said iron-type metal member and the said aluminum-type metal member are laminated | stacked through a galvanization layer in the part except the said junction plan part.
前記ロウ材は、少なくとも前記接合予定部に配置されていればよく、該接合予定部を超えてそれ以外の部分に配置されてもよい。また、前記亜鉛メッキ層は、前記接合予定部を除く部分では前記ロウ材に積層されてもよい。 The brazing material only needs to be disposed at least in the planned joining portion, and may be disposed in other portions beyond the planned joining portion. Further, the galvanized layer may be laminated on the brazing material in a portion excluding the portion to be joined.
次に、前記鉄系金属部材と前記アルミニウム系金属部材との間に、前記ロウ材と、前記亜鉛メッキ層とを配置した状態で、少なくとも前記鉄系金属部材に通電する。前記通電は、前記鉄系金属部材の前記接合予定部と反対側の面に主電極とアース電極とを当接させて、両電極間に通電するようにして行うことができる。また、前記鉄系金属部材と前記アルミニウム系金属部材とのそれぞれの前記接合予定部と反対側の面にそれぞれ電極を当接させて、両電極間に通電するようにして行ってもよい。 Next, at least the iron-based metal member is energized in a state where the brazing material and the galvanized layer are disposed between the iron-based metal member and the aluminum-based metal member. The energization can be performed such that a main electrode and a ground electrode are brought into contact with a surface of the iron-based metal member opposite to the planned joining portion and energized between both electrodes. Further, the electrodes may be brought into contact with the surfaces of the iron-based metal member and the aluminum-based metal member on the opposite sides of the planned joining portions, and current may be passed between the electrodes.
前記通電により、各金属部材及び前記ロウ材が溶融されて接合部が形成される。このとき、前記鉄系金属部材と前記アルミニウム系金属部材とは、前記接合予定部を除く部分で、亜鉛メッキ層を介して積層されているので、該両金属部材は直接接触することがなく、Ｆｅ２Ａｌ５等のＦｅ−Ａｌ金属間化合物の形成を防止することができる。 By the energization, each metal member and the brazing material are melted to form a joint. At this time, since the iron-based metal member and the aluminum-based metal member are laminated via the galvanized layer in a portion excluding the joint planned portion, the both metal members are not in direct contact with each other, Formation of Fe—Al intermetallic compounds such as Fe 2 Al 5 can be prevented.
本発明の抵抗溶接方法によれば、前記鉄系金属部材と前記アルミニウム系金属部材とが前記接合部で接合された接合部材を得ることができる。前記接合部材において、前記鉄系金属部材は、該鉄系金属部材の母材と接合するＦｅ３Ａｌ２Ｓｉ３層と、一方の面で該Ｆｅ３Ａｌ２Ｓｉ３層と接合すると共に他方の面で前記アルミニウム系金属部材と接合するＡｌ−Ｚｎ合金層とからなる接合部を介して該アルミニウム系金属部材と接合されている。 According to the resistance welding method of the present invention, it is possible to obtain a joint member in which the iron-based metal member and the aluminum-based metal member are joined at the joint. In the joining member, wherein the iron-based metallic member, and Fe 3 Al 2 Si 3 layer for bonding the base material of the iron-based metallic member, the other with joining with the Fe 3 Al 2 Si 3 layer on one surface It is joined to the aluminum-based metal member via a joint portion composed of an Al—Zn alloy layer joined to the aluminum-based metal member on the surface.
前記Ｆｅ３Ａｌ２Ｓｉ３層は、前記鉄系金属部材の母材及び前記Ａｌ−Ｚｎ合金層と同一の結晶構造を備えている上、Ｆｅ及びＡｌの拡散に対する障壁となることができる。従って、本発明の抵抗溶接方法により得られる前記接合部材は、Ｆｅ２Ａｌ５等のＦｅ−Ａｌ金属間化合物が形成されることがなく、前記接合部を介して前記鉄系金属部材と前記アルミニウム系金属部材とを強固に接合することができる。 The Fe 3 Al 2 Si 3 layer has the same crystal structure as the base metal of the iron-based metal member and the Al—Zn alloy layer, and can serve as a barrier against diffusion of Fe and Al. Therefore, in the joining member obtained by the resistance welding method of the present invention, the Fe-Al intermetallic compound such as Fe 2 Al 5 is not formed, and the iron-based metal member and the aluminum are interposed via the joining portion. The system metal member can be firmly bonded.
ここで、前記鉄系金属部材と前記アルミニウム系金属部材とは、前記接合予定部を除く部分で、亜鉛メッキ層を介して積層してもよく、前記鉄系金属部材と前記アルミニウム系金属部材とが直接接触することを防止できるメッキ層であれば、亜鉛メッキ層以外の他のメッキ層を介して積層してもよい。 Herein, the ferrous metal member and the aluminum metal member, at a portion excluding the predetermined joining portion may be layered with the galvanized layer, before Kitetsu based metallic member and the aluminum metal member As long as the plating layer can prevent direct contact with each other, it may be laminated via a plating layer other than the zinc plating layer.
本発明の抵抗溶接方法では、前記鉄系金属部材としては亜鉛メッキ層が施されたものを用いることができる。このとき、前記鉄系金属部材は、加熱して前記接合予定部の該亜鉛メッキ層を蒸散させることにより母材を露出させることができる。そして、前記母材と前記アルミニウム系金属部材との間にＺｎ−Ｓｉ合金からなるロウ材を配置すると共に、前記接合予定部以外の部分に絶縁材を配置することにより、抵抗溶接を行うことができる。 In the resistance welding method of the present invention, a galvanized layer can be used as the iron-based metal member. At this time, the iron-based metal member can expose the base material by heating and evaporating the galvanized layer of the planned joining portion. And while arrange | positioning the brazing material which consists of a Zn-Si alloy between the said base material and the said aluminum-type metal member, by arranging an insulating material in parts other than the said joining plan part, resistance welding can be performed. it can.
また、本発明の抵抗溶接方法では、前記接合予定部の前記亜鉛メッキ層を蒸散させて前記鉄系金属部材の母材を露出させたときに、さらに前記鉄系金属部材を加熱して該母材を溶融させて溶融プールを形成し、該溶融プールに前記ロウ材を添加して溶融させてもよい。この場合には、前記ロウ材は前記溶融プールに添加されることにより一旦溶融するが、該ロウ材及び該溶融プールが冷却されて固化することにより、前記母材上に前記ロウ材が配置された状態とすることができる。 In the resistance welding method of the present invention, when the galvanized layer of the planned joining portion is evaporated to expose the base material of the iron-based metal member, the iron-based metal member is further heated to form the base. The material may be melted to form a molten pool, and the brazing material may be added to the molten pool and melted. In this case, the brazing material is once melted by being added to the melting pool, but the brazing material and the molten pool are cooled and solidified, whereby the brazing material is disposed on the base material. State.
次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
本発明の抵抗溶接方法の第１の実施形態では、図１（ａ）に示すように、まず、亜鉛メッキ鋼板１を加熱し、接合予定部２の亜鉛メッキ層３を蒸散させて除去し、母材である鋼板表面１ａを露出させる。前記亜鉛メッキ鋼板１の加熱は、例えば、接合予定部２に電極を近接させ、該電極からアーク放電を生じさせることにより行うことができる。 In the first embodiment of the resistance welding method of the present invention, as shown in FIG. 1 (a), first, the galvanized steel sheet 1 is heated to remove the galvanized layer 3 of the planned joining portion 2 by evaporation, The steel plate surface 1a which is a base material is exposed. The galvanized steel sheet 1 can be heated, for example, by bringing an electrode close to the joining portion 2 and causing arc discharge from the electrode.
次に、図１（ｂ）に示すように、接合予定部２の鋼板表面１ａ上にＺｎ−Ｓｉ合金からなるロウ材４を配置する。前記Ｚｎ−Ｓｉ合金は、例えば、合金全体の１質量％のＳｉを含むものを用いることができる。 Next, as shown in FIG. 1B, a brazing material 4 made of a Zn—Si alloy is disposed on the steel plate surface 1 a of the planned joining portion 2. As the Zn—Si alloy, for example, an alloy containing 1 mass% Si of the whole alloy can be used.
一方、図１（ｃ）に示すように、アルミニウム合金板５の接合予定部２を除く部分に絶縁材６を配置する。絶縁材６としては、例えば、接着剤、ペースト状シール材、粘土状シール材等を用いることができる。尚、アルミニウム合金板５は表面に全く亜鉛メッキ層を備えていない。 On the other hand, as shown in FIG. 1 (c), an insulating material 6 is disposed in a portion of the aluminum alloy plate 5 excluding the planned joining portion 2. As the insulating material 6, for example, an adhesive, a paste-like sealing material, a clay-like sealing material, or the like can be used. The aluminum alloy plate 5 has no galvanized layer on the surface.
次に、図２（ａ）に示すように、亜鉛メッキ鋼板１とアルミニウム合金板５とを、ロウ材４及び絶縁材６を介して重ね合わせ、亜鉛メッキ鋼板１の表面に主電極７及び１対のアース電極８，８を当接する。主電極７は、亜鉛メッキ鋼板１の接合予定部２と反対側の表面に、接合予定部２に配置されたロウ材４の直上となる位置に当接される。また、１対のアース電極８，８は、主電極７の両側で亜鉛メッキ鋼板１の表面に当接される。 Next, as shown in FIG. 2 (a), the galvanized steel sheet 1 and the aluminum alloy sheet 5 are overlapped via the brazing material 4 and the insulating material 6, and the main electrodes 7 and 1 are placed on the surface of the galvanized steel sheet 1. The pair of ground electrodes 8 and 8 are brought into contact with each other. The main electrode 7 is brought into contact with the surface of the galvanized steel sheet 1 on the side opposite to the planned joining portion 2 at a position directly above the brazing material 4 disposed in the planned joining portion 2. The pair of ground electrodes 8, 8 are in contact with the surface of the galvanized steel sheet 1 on both sides of the main electrode 7.
そして、主電極７とアース電極８との間に通電して亜鉛メッキ鋼板１、ロウ材４、アルミニウム合金板５を加熱して溶融させることにより、図３（ａ）に示す接合部材９を得ることができる。接合部材９は、亜鉛メッキ鋼板１とアルミニウム合金板５とが接合部１０を介して接合されている。 And the joining member 9 shown to Fig.3 (a) is obtained by supplying with electricity between the main electrode 7 and the earth electrode 8, and heating and fuse | melting the galvanized steel plate 1, the brazing material 4, and the aluminum alloy plate 5. FIG. be able to. In the joining member 9, the galvanized steel plate 1 and the aluminum alloy plate 5 are joined through a joint 10.
尚、亜鉛メッキ鋼板１は、接合部１０側の表面に図示しない亜鉛メッキ層を備えており、接合部１０は亜鉛メッキ鋼板１の亜鉛メッキ層を備えていない部分に形成されている。 The galvanized steel sheet 1 includes a galvanized layer (not shown) on the surface on the joint 10 side, and the joint 10 is formed in a portion of the galvanized steel sheet 1 that does not include the galvanized layer.
接合部１０は、図３（ｂ）に拡大して示すように、Ｆｅ３Ａｌ２Ｓｉ３層１０ａと、Ａｌ−Ｚｎ合金層１０ｂとからなる。Ｆｅ３Ａｌ２Ｓｉ３層１０ａは一方の面で亜鉛メッキ鋼板１の母材である鋼板表面１ａと接合すると共に、他方の面でＡｌ−Ｚｎ合金層１０ｂと接合している。また、Ａｌ−Ｚｎ合金層１０ｂは、一方の面でＦｅ３Ａｌ２Ｓｉ３層１０ａと接合すると共に、他方の面でアルミニウム合金板５と接合している。 As shown in an enlarged view in FIG. 3B, the joint portion 10 includes an Fe 3 Al 2 Si 3 layer 10a and an Al—Zn alloy layer 10b. The Fe 3 Al 2 Si 3 layer 10a is joined to the steel plate surface 1a, which is the base material of the galvanized steel plate 1, on one side, and to the Al—Zn alloy layer 10b on the other side. In addition, the Al—Zn alloy layer 10 b is bonded to the Fe 3 Al 2 Si 3 layer 10 a on one surface and is bonded to the aluminum alloy plate 5 on the other surface.
接合部材９において、Ｆｅ３Ａｌ２Ｓｉ３層１０ａは、亜鉛メッキ鋼板１の母材である鋼板及びＡｌ−Ｚｎ合金層１０ｂと同一の結晶構造を備えている上、Ｆｅ及びＡｌの拡散に対する障壁となることができる。従って、本実施形態の抵抗溶接方法により得られる接合部材９は、Ｆｅ２Ａｌ５等のＦｅ−Ａｌ金属間化合物が形成されることがなく、接合部１０を介して亜鉛メッキ鋼板１とアルミニウム合金板５とを強固に接合することができる。 In the bonding member 9, the Fe 3 Al 2 Si 3 layer 10 a has the same crystal structure as that of the steel plate and the Al—Zn alloy layer 10 b as the base material of the galvanized steel plate 1, and is a barrier against diffusion of Fe and Al. Can be. Therefore, in the joining member 9 obtained by the resistance welding method of the present embodiment, the Fe—Al intermetallic compound such as Fe 2 Al 5 is not formed, and the galvanized steel sheet 1 and the aluminum alloy are joined via the joining portion 10. The plate 5 can be firmly joined.
また、本実施形態では、図２（ａ）に示す主電極７及びアース電極８に代えて、図２（ｂ）に示すように１対の主電極７，７を用いてもよい。このとき、亜鉛メッキ鋼板１の接合予定部２と反対側の表面に、ロウ材４の直上となる位置に一方の主電極７が当接され、アルミニウム合金板５の接合予定部２と反対側の表面に、ロウ材４の直下となる位置に他方の主電極７が当接される。 In the present embodiment, a pair of main electrodes 7 and 7 may be used as shown in FIG. 2B instead of the main electrode 7 and the ground electrode 8 shown in FIG. At this time, one main electrode 7 is brought into contact with the surface of the galvanized steel sheet 1 opposite to the planned joining portion 2 at a position directly above the brazing material 4, and the opposite side of the aluminum alloy plate 5 from the planned joining portion 2. The other main electrode 7 is brought into contact with the surface of the surface at a position directly below the brazing material 4.
そして、主電極７，７の間に通電して亜鉛メッキ鋼板１、ロウ材４、アルミニウム合金板５を加熱して溶融させることにより、図３（ａ）に示す接合部材９を得ることができる。 Then, the joining member 9 shown in FIG. 3A can be obtained by energizing the main electrodes 7 and 7 to heat and melt the galvanized steel sheet 1, the brazing material 4, and the aluminum alloy sheet 5. .
次に、本発明の抵抗溶接方法の第２の実施形態では、図４（ａ）に示すように、まず、亜鉛メッキ鋼板１を加熱し、接合予定部２の亜鉛メッキ層３を蒸散させて除去し、母材である鋼板表面１ａを露出させる。前記亜鉛メッキ鋼板１の加熱は、例えば、前記第１の実施形態と同様にアーク放電により行うことができる。 Next, in the second embodiment of the resistance welding method of the present invention, as shown in FIG. 4 (a), first, the galvanized steel sheet 1 is heated to evaporate the galvanized layer 3 of the portion 2 to be joined. It removes and the steel plate surface 1a which is a base material is exposed. The galvanized steel sheet 1 can be heated, for example, by arc discharge as in the first embodiment.
次に、図４（ｂ）に示すように、亜鉛メッキ鋼板１をさらに加熱することにより、露出された鋼板表面１ａを溶融させて溶融プール１ｂを形成し、溶融プール１ｂにロウ材４を添加する。ロウ材４は溶融プール１ｂに添加されることにより一旦溶融するが、ロウ材４及び溶融プール１ｂが冷却されて固化することにより、図４（ｃ）に示すように、接合予定部２の鋼板表面１ａ上にロウ材４が配置された状態になる。 Next, as shown in FIG. 4B, the galvanized steel sheet 1 is further heated to melt the exposed steel sheet surface 1a to form a molten pool 1b, and the brazing material 4 is added to the molten pool 1b. To do. The brazing material 4 is once melted by being added to the molten pool 1b. However, as the brazing material 4 and the molten pool 1b are cooled and solidified, as shown in FIG. The brazing material 4 is placed on the surface 1a.
次に、図４（ｄ）に示すように、アルミニウム合金板５の接合予定部２を除く部分に絶縁材６を配置する。 Next, as shown in FIG. 4 (d), the insulating material 6 is disposed on the portion of the aluminum alloy plate 5 excluding the planned joining portion 2.
次に、図２に示す前記第１の実施形態の場合と全く同一にして、図３（ａ）に示す接合部材９を得ることができる。本実施形態の抵抗溶接方法により得られた接合部材９は前記第１の実施形態の場合と全く同一の構成を備えており、全く同一の効果を得ることができる。 Next, the joining member 9 shown in FIG. 3A can be obtained in exactly the same manner as in the first embodiment shown in FIG. The joining member 9 obtained by the resistance welding method of the present embodiment has the same configuration as in the case of the first embodiment, and can obtain exactly the same effect.
前記実施形態では、いずれも亜鉛メッキ鋼板１とアルミニウム合金板５との接合予定部２を除く部分に絶縁材６を配置しているが、絶縁材６は用いなくてもよい。この場合、鋼板１とアルミニウム合金板５とが、接合予定部２を除く部分で亜鉛メッキ層を介して積層されていることになる。 In each of the above embodiments, the insulating material 6 is disposed in a portion excluding the portion to be joined 2 between the galvanized steel plate 1 and the aluminum alloy plate 5, but the insulating material 6 may not be used. In this case, the steel plate 1 and the aluminum alloy plate 5 are laminated through the galvanized layer at the portion excluding the portion to be joined 2.
また、亜鉛メッキ層を全く備えていない鋼板を用いるときには、亜鉛メッキ層を備えるアルミニウム合金板を用いてもよい。 Further, when using steel plates not provided with any galvanized layer may be an aluminum alloy plate with a galvanized layer.
また、前記実施形態では、いずれも全く亜鉛メッキ層を備えていないアルミニウム合金板５を用いているが、亜鉛メッキ層を備えるアルミニウム合金板を用いてもよい。 Moreover, in the said embodiment, although the aluminum alloy plate 5 which is not provided with the zinc plating layer at all is used, you may use the aluminum alloy plate provided with the zinc plating layer.
また、前記実施形態では、接合予定部２のみにロウ材４を配置し、接合予定部２を除く部分に亜鉛メッキ層３を配置しているが、ロウ材４は接合予定部２を超えてそれ以外の部分に配置されてもよい。また、この場合、亜鉛メッキ層３は、接合予定部２を除く部分ではロウ材４に積層されてもよい。 Moreover, in the said embodiment, although the brazing material 4 is arrange | positioned only to the joining plan part 2, and the zinc plating layer 3 is arrange | positioned in the part except the joining plan part 2, the brazing material 4 exceeds the joining plan part 2 You may arrange | position in a part other than that. Further, in this case, the galvanized layer 3 may be laminated on the brazing material 4 in a portion other than the planned joining portion 2.
１…亜鉛メッキ鋼板、 ２…接合予定部、 ４…ロウ材、 ５…アルミニウム合金板、 ６…絶縁材、 ７…主電極、 ８…アース電極、 ９…接合部材、 １０…接合部。 DESCRIPTION OF SYMBOLS 1 ... Galvanized steel plate, 2 ... Joining planned part, 4 ... Brazing material, 5 ... Aluminum alloy plate, 6 ... Insulating material, 7 ... Main electrode, 8 ... Ground electrode, 9 ... Joining member, 10 ... Joining part.
Claims (4)
少なくとも接合予定部の該鉄系金属部材の母材と該アルミニウム系金属部材との間にＺｎ−Ｓｉ合金からなるロウ材を配置する工程と、
該鉄系金属部材と該アルミニウム系金属部材とを、該接合予定部を除く部分で、亜鉛メッキ層を介して積層する工程と、
少なくとも該鉄系金属部材に通電することにより、各金属部材及び該ロウ材を溶融させて接合部を形成する工程とを備えることを特徴とする抵抗溶接方法。 In a resistance welding method for joining an iron-based metal member and an aluminum-based metal member by resistance welding,
A step of disposing a brazing material made of a Zn-Si alloy between the base metal of the iron-based metal member and the aluminum-based metal member at least to be joined;
A step of laminating the iron-based metal member and the aluminum-based metal member through a galvanized layer at a portion excluding the portion to be joined;
And a step of melting each metal member and the brazing material to form a joint by energizing at least the iron-based metal member.
該鉄系金属部材は、該鉄系金属部材の母材と接合するＦｅ３Ａｌ２Ｓｉ３層と、一方の面で該Ｆｅ３Ａｌ２Ｓｉ３層と接合すると共に他方の面で該アルミニウム系金属部材と接合するＡｌ−Ｚｎ合金層とからなる接合部を介して該アルミニウム系金属部材と接合されていることを特徴とする接合部材。 In the joining member formed by joining the iron-based metal member and the aluminum-based metal member to which the galvanized layer has been applied except for the planned joining portion, by resistance welding,
Iron-based metallic member, and Fe 3 Al 2 Si 3 layer for bonding the base material of the iron-based metallic member, the aluminum-based on the other side with joined with the Fe 3 Al 2 Si 3 layer on one surface A joining member, wherein the joining member is joined to the aluminum-based metal member via a joining portion composed of an Al—Zn alloy layer joined to the metal member.
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