PROBLEM TO BE SOLVED: To provide a method for achieving higher reliability in prevention of stress corrosion crack in a member (for example, an automotive component) made of a 7000 series aluminum alloy extruded material as a raw material.SOLUTION: An extruded member comprises a 7000 series aluminum alloy extruded material having a 0.2% proof stress of 350 MPa or more, and a hollow-cross section, as a raw material. The extruded member comprises: an area to which a residual compression stress is applied, in the whole part or a part of the surface. The residual compression stress in the outermost layer in said area corresponds to 10-30% of durability of the raw material. The residual compression stress may be applied, for example, by a peening process.SELECTED DRAWING: Figure 6

    【課題】7000系アルミニウム合金中空押出材を素材とする部材(例えば自動車用部品)において、応力腐食割れを防止する上でより高い信頼性を実現する方法の提供。【解決手段】0.2%耐力が350MPa以上で中空断面を有する7000系アルミニウム合金押出材を素材とする押出部材。この押出部材は、表面の全体又は一部に残留圧縮応力が付与された領域を有し、前記領域の最表層の残留圧縮応力が素材耐力の10〜30%に相当する。前記残留圧縮応力は、例えばピーニング処理により付与することができる。【選択図】図6


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    Titel :

    EXTRUSION MEMBER


    Weitere Titelangaben:

    押出部材


    Beteiligte:
    HOSOI HIROAKI (Autor:in) / SHIKAMA TAKAHIRO (Autor:in)

    Erscheinungsdatum :

    2017-10-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING , Herstellen von Blechen, Metalldraht, -stangen, -rohren Metallprofilen oder Halbzeugen auf andere Weise als durch Walzen / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge



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