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    Method for producing magnesium alloy
    1.
    发明授权
    Method for producing magnesium alloy 有权

    公开(公告)号：US12123086B2

    公开(公告)日：2024-10-22

    申请号：US17185521

    申请日：2021-02-25

    Applicant: BIOTRONIK AG

    Inventor： Heinz Mueller ,  Peter Uggowitzer ,  Joerg Loeffler

    IPC: C22F1/06 ,  A61F2/82 ,  A61L27/04 ,  A61L27/58 ,  A61L31/02 ,  A61L31/14 ,  C22C23/02

    CPC classification number: C22F1/06 ,  A61F2/82 ,  A61L27/047 ,  A61L27/58 ,  A61L31/022 ,  A61L31/148 ,  C22C23/02

    Abstract: A method for producing a magnesium alloy having improved mechanical and electrochemical properties. The method includes generating a high-purity magnesium by vacuum distillation. A billet of the alloy is generated by synthesis of the high-purity magnesium with 2.0 to 10.0% by weight Al, the remainder being magnesium containing impurities, which promote electrochemical potential differences and/or the formation of precipitations and/or intermetallic phases, in a total amount of no more than 0.0063% by weight of Fe, Si, Mn, Co, Ni, Cu, Zr, Y, Sc or rare earths having the ordinal numbers 21, 57 to 71 and 89 to 103, Be, Cd, In, Sn and/or Pb as well as P, wherein the matrix of the alloy includes intermetallic phases formed of Mg and Al. The alloy is homogenized by annealing at a temperature between 150° C. and 450° C. The homogenized alloy is formed in the temperature range between 200° C. and 400° C.

    GALVANICALLY-ACTIVE IN SITU FORMED PARTICLES FOR CONTROLLED RATE DISSOLVING TOOLS
    2.
    发明公开
    GALVANICALLY-ACTIVE IN SITU FORMED PARTICLES FOR CONTROLLED RATE DISSOLVING TOOLS 审中-公开

    公开(公告)号：US20240344189A1

    公开(公告)日：2024-10-17

    申请号：US18752536

    申请日：2024-06-24

    Applicant: Terves, LLC

    Inventor： Brian P. Doud ,  Nicholas J. Farkas ,  Andrew Sherman

    IPC: C22F1/06 ,  C22C1/02 ,  C22C23/00 ,  C22C23/02

    CPC classification number: C22F1/06 ,  C22C1/02 ,  C22C23/00 ,  C22C23/02

    Abstract: A castable, moldable, and/or extrudable structure using a metallic primary alloy. One or more additives are added to the metallic primary alloy so that in situ galvanically-active reinforcement particles are formed in the melt or on cooling from the melt. The composite contains an optimal composition and morphology to achieve a specific galvanic corrosion rate in the entire composite. The in situ formed galvanically-active particles can be used to enhance mechanical properties of the composite, such as ductility and/or tensile strength. The final casting can also be enhanced by heat treatment, as well as deformation processing such as extrusion, forging, or rolling, to further improve the strength of the final composite over the as-cast material.

    MAGNESIUM ALLOYS AND METHODS OF MAKING AND USE THEREOF
    4.
    发明公开
    MAGNESIUM ALLOYS AND METHODS OF MAKING AND USE THEREOF 审中-公开

    公开(公告)号：US20240026499A1

    公开(公告)日：2024-01-25

    申请号：US18224247

    申请日：2023-07-20

    Applicant: Ohio State Innovation Foundation ,  Terves, Inc.

    Inventor： Alan Luo ,  Joshua Caris ,  Thomas Avey

    IPC: C22C23/02 ,  C22C1/12 ,  C22C23/04 ,  C22F1/06

    CPC classification number: C22C23/02 ,  C22C1/12 ,  C22C23/04 ,  C22F1/06

    Abstract: Disclosed herein are magnesium alloys and methods of making and use thereof. For example, disclosed herein are magnesium alloys comprising: from 0 to 1.5 wt. % Zn; from 0 to 1.5 wt. % Al; less than 0.2 wt. % Ca; from 0.2 to 0.4 wt. % Ce; from 0.1 to 0.8 wt. % Mn; and the balance comprising Mg. In some examples, the magnesium alloy comprises less than 1 wt. % Zn. In some examples, the magnesium alloy comprises less than 1 wt. % Al. In some examples, the magnesium alloy exhibits substantially no incipient melting when extruded with a ram speed of from 1.00 to 10.00 ipm. In some examples, the magnesium alloy is substantially free of a Mg2Ca phase, an AlCaMg phase, an Al2Ca phase, a Ca2Mg6Zn3 phase, or a combination thereof. In some examples, the magnesium alloy is substantially free of a Mg2Ca phase.

    METHODS FOR EXTRUDING COARSE-GRAINED, LOW ALUMINUM CONTENT MAGNESIUM ALLOYS
    6.
    发明公开
    METHODS FOR EXTRUDING COARSE-GRAINED, LOW ALUMINUM CONTENT MAGNESIUM ALLOYS 审中-公开

    公开(公告)号：US20230381845A1

    公开(公告)日：2023-11-30

    申请号：US17872766

    申请日：2022-07-25

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Henry ZHAN ,  Congjie WANG

    IPC: B21C23/00 ,  C22C23/00 ,  C22F1/06

    CPC classification number: B21C23/002 ,  C22C23/00 ,  C22F1/06

    Abstract: The present disclosure provides a method of forming an extruded billet from a coarse-grained magnesium alloy billet. The method includes extruding the coarse-grained magnesium alloy biller at temperatures greater than or equal to about 300° C. to less than or equal to about 360° C. to from the extruded billet. The coarse-grained magnesium alloy billet has an average grain size greater than or equal to about 800 μm, and has a low aluminum content. The coarse-grained magnesium alloy billet includes greater than or equal to about 0.5 wt. % to less than or equal to about 3 wt. % of aluminum. The extruded billet may have a plurality of twins with lenticular morphology, which occupies an area fraction greater than or equal to about 20% of a total area of the extruded billet.

    Method for preparing large-size rare earth magnesium alloy high-performance ingots by short process severe plastic deformation
    7.
    发明授权
    Method for preparing large-size rare earth magnesium alloy high-performance ingots by short process severe plastic deformation 有权

    公开(公告)号：US11813653B2

    公开(公告)日：2023-11-14

    申请号：US17944218

    申请日：2022-09-14

    Applicant: North University of China

    Inventor： Zhimin Zhang ,  Jianmin Yu ,  Zhen Wang ,  Zhe Cheng ,  Mei Cheng

    IPC: B21D22/02 ,  C22F1/06

    CPC classification number: B21D22/022 ,  C22F1/06

    Abstract: The present disclosure discloses a method for preparing large-size rare earth magnesium alloy with high-performance ingots by short process severe plastic deformation. When in use, the pushing cylinder moves upward, and the back pressure plate is adjusted to the outlet of the extrusion deformation area. After the male mold stroke is completed, the recoverable discard block fills the extrusion deformation area, and the upsetting extrusion deformation is completed. Then, the pushing cylinder drives the back pressure plate to remove from the lower part of the lower mold cavity downward, and the recoverable discard block has been broken due to the high pressure. Then, the extruded blank and residual block powder are taken out from the lower part of the lower mold cavity, restored into a plate shape for the next use. The present disclosure can solve the tail shrinking phenomenon, save materials and increase the strengthening effect.

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