BONDED JOINT

• Main Authors: KADA OSAMU, MATSUI NAOKI, NARUMIYA HIROKI, SUZUKI ATSUSHI, ARAGAI YASUHARU
• Format: Patent
• Language: English; Japanese
• Published: 07.05.2024
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a bonded joint with excellent strength.SOLUTION: A bonded joint 1 comprises a steel section 10, an aluminum alloy section 20, and a diffusion layer 30 formed between the steel section 10 and the aluminum alloy section 20. The diffusion layer 30 is adjacent to the aluminum alloy section 20 and includes a diffusion region 32 adjacent to the aluminum alloy section with an Fe content ratio of 1.0 to 3.0% in the case where an Fe content in the steel section 10 is regarded as 100%. A thickness of the diffusion region 32 adjacent to the aluminum alloy section obtained by glow discharge optical emission spectrometry performed in a thickness direction of the diffusion layer 30 is 19.5 to 25.0 μm.SELECTED DRAWING: Figure 1 【課題】優れた強度を有する接合継手を提供する。【解決手段】本実施形態の接合継手１は、鋼部１０と、アルミニウム合金部２０と、鋼部１０とアルミニウム合金部２０との間に形成されている拡散層３０とを備える。拡散層３０は、アルミニウム合金部２０と隣接し、鋼部１０でのＦｅ含有量を１００％とした場合のＦｅ含有量比率が１．０～３．０％であるアルミニウム合金部隣接拡散領域３２を含み、拡散層３０の厚さ方向にグロー放電発光分析を実施して得られたアルミニウム合金部隣接拡散領域３２の厚さが１９．５～２５．０μｍである。【選択図】図１