METHOD FOR MANUFACTURING DISSIMILAR METAL JOINED BODY AND METHOD FOR JOINING DISSIMILAR METAL MATERIAL

To prevent corrosion caused by contact of dissimilar metal when lap-joining a titanium-based material and a ferrous material.SOLUTION: A method for manufacturing a dissimilar metal joined body obtained by lap joining a titanium-based material and a ferrous material includes: a step of applying a resin-based sealing material onto a region including a junction of at least the titanium-based material and the ferrous material in an overlapping region of the titanium-based material and the ferrous material with respect to at least one surface of the titanium-based material and the ferrous material; a step of overlapping the titanium-based material and the ferrous material so that a sealing material is interposed between the titanium-based material and the ferrous material; and a step of joining titanium-based material and the ferrous material using friction-agitation joining, in this order. In the joining step, the sealing material is interposed all over from the circumference of the junction to the end of the overlapping region.SELECTED DRAWING: Figure 1 【課題】チタン系材料と鉄系材料の重ね接合をするに際し、異種金属の接触による腐食を防止する。【解決手段】チタン系材料と鉄系材料を重ね接合して得られる異種金属接合体の製造方法であって、チタン系材料と鉄系材料の少なくとも一方の面に対し、チタン系材料と鉄系材料との重ね合わせ領域における少なくともチタン系材料と鉄系材料との接合部を含む領域に樹脂系のシーリング材を塗布する工程と、シーリング材がチタン系材料と鉄系材料の間に介在するように、チタン系材料と鉄系材料を重ね合わせる工程と、摩擦撹拌接合を用いてチタン系材料と鉄系材料を接合する工程と、を順に有し、接合する工程において、接合部の周縁から重ね合わせ領域の端部に至るまでシーリング材が介在する異種金属接合体の製造方法。【選択図】図１