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    PROCEDE DE MISE EN FORME DE MATERIAUX METALLIQUES A L'ETAT SEMI-SOLIDE
    1.
    发明公开
    PROCEDE DE MISE EN FORME DE MATERIAUX METALLIQUES A L'ETAT SEMI-SOLIDE 失效
    方法为成型半固态金属材料

    公开(公告)号：EP0689485A1

    公开(公告)日：1996-01-03

    申请号：EP95907033.0

    申请日：1995-01-13

    申请人： ALUMINIUM PECHINEY

    发明人： GARAT, Michel ,  LOUE, Willem

    IPC分类号： B22D18 ,  B22D17 ,  C22C1

    CPC分类号： B22D18/08 ,  B22D17/007 ,  C22C1/005 ,  Y10S164/90

    摘要： A semi-solid metal forming method comprising the steps of providing a thixotropic metal slug corresponding to the weight of metal to be used, heating slug to a semi-solid state until the liquid fraction gives the desired forming viscosity, transferring the slug to a pressure die-casting or forging press, and forming the slug by pressure die-casting or forging. According to the method, the viscosity of the slug is adjusted to the desired value by correspondingly adjusting the heating power by a quantity related to the resistance of the material to the forging punch or the plunger during the process of filling the forging die or the mould cavity. Said method is particularly suitable for forming thixotropic aluminium alloys.

    MASSE D'ALLIAGE METALLIQUE POUR FORMAGE A L'ETAT SEMI-SOLIDE
    4.
    发明公开
    MASSE D'ALLIAGE METALLIQUE POUR FORMAGE A L'ETAT SEMI-SOLIDE 失效
    合金材料半固态成形

    公开(公告)号：EP0877658A1

    公开(公告)日：1998-11-18

    申请号：EP97901684.0

    申请日：1997-01-28

    申请人： ALUMINIUM PECHINEY

    发明人： GARAT, Michel ,  PLUCHON, Christian ,  LOUE, Willem ,  BRIMONT, Michel ,  TAVERNIER, Marc

    IPC分类号： B22D1 ,  B22D27 ,  C22C1 ,  C22C21

    CPC分类号： C22C1/005 ,  B22D1/00

    摘要： A metal alloy mass for semi-solid forming is disclosed. After being air-cooled to room temperature from a temperature corresponding to a liquid fraction content of 30-70 %, the mass has a pore ratio of 2-20 % and preferably 3-8 %, as measured by image analysis. A metal alloy mass for semi-solid forming, cast from a liquid metal of which the gassing level, as measured by a solidification test under 80 hPa, is such that the sample has a volume pore ratio of 3-50 % and preferably 4-25 %, is also disclosed. The method for making said mass includes treating the alloy in a liquid state to add a soluble and chemically non-reactive gas such as hydrogen. The rheological properties of the semi-solid metal may thus be improved, whereby parts having a higher quality may be obtained.