STRUCTURAL MEMBER FOR AUTOMOBILE

To provide a structural member for an automobile that achieves weight reduction and improvement of collision safety of the automobile.SOLUTION: The structural member for an automobile includes a steel sheet having a flat portion and a bending angle portion. In the bending angle portion, the ratio (R...

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Bibliographische Detailangaben
Hauptverfasser:	EBINA YOSHINORI, OKU NOBUAKI, HIRAIDE TAKUYA, FUKUHARA EMI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMISTRY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
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Beschreibung
Zusammenfassung:	To provide a structural member for an automobile that achieves weight reduction and improvement of collision safety of the automobile.SOLUTION: The structural member for an automobile includes a steel sheet having a flat portion and a bending angle portion. In the bending angle portion, the ratio (R[mm]/t[mm]) of the radius of curvature (R[mm]/t[mm]) with respect to the thickness (t[mm]) of the steel sheet is 3.0 or less. The Vickers hardness (H[HV]) at the center of the arc of the bending angle portion is larger than the Vickers hardness (H[HV]) in the flat portion. Difference between H[HV] and H[HV] is 100 [HV] or more.SELECTED DRAWING: Figure 2 【課題】自動車の軽量化及び衝突安全性向上を実現し得る自動車用構造部材を提供する。【解決手段】自動車用構造部材は、平坦部と曲げ角部を有する鋼板を含む。曲げ角部は、曲げ角部における鋼板の厚み（ｔ［ｍｍ］）に対する曲げ角部における鋼板の曲率半径（Ｒ［ｍｍ］）の比（Ｒ［ｍｍ］／ｔ［ｍｍ］）が３．０以下である。曲げ角部の弧の中心部におけるビッカース硬さ（ＨＣ［ＨＶ］）が、平坦部におけるビッカース硬さ（ＨＦ［ＨＶ］）よりも大きい。ＨＣ［ＨＶ］とＨＦ［ＨＶ］との違いが、１００［ＨＶ］以上である。【選択図】図２