EP3895827B1 - Procédé de fabrication d'un corps creux en métal amorphe - Google Patents

Procédé de fabrication d'un corps creux en métal amorphe Download PDF

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Publication number
EP3895827B1
EP3895827B1 EP20170051.5A EP20170051A EP3895827B1 EP 3895827 B1 EP3895827 B1 EP 3895827B1 EP 20170051 A EP20170051 A EP 20170051A EP 3895827 B1 EP3895827 B1 EP 3895827B1
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EP
European Patent Office
Prior art keywords
inner core
range
amorphous metal
separating element
separation element
Prior art date
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EP20170051.5A
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German (de)
English (en)
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EP3895827A1 (fr
Inventor
Hans Jürgen WACHTER
Elena BIEN
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Heraeus Amloy Technologies GmbH
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Heraeus Amloy Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Heraeus Amloy Technologies GmbH filed Critical Heraeus Amloy Technologies GmbH
Priority to EP20170051.5A priority Critical patent/EP3895827B1/fr
Priority to PCT/EP2021/058883 priority patent/WO2021209280A1/fr
Priority to US17/996,056 priority patent/US20230201913A1/en
Priority to CN202180027282.2A priority patent/CN115397580A/zh
Publication of EP3895827A1 publication Critical patent/EP3895827A1/fr
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Publication of EP3895827B1 publication Critical patent/EP3895827B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B22C9/103—Multipart cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2236—Equipment for loosening or ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2263—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies having tubular die cavities
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/11—Making amorphous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/003—Making ferrous alloys making amorphous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/001—Amorphous alloys with Cu as the major constituent

Definitions

  • Amorphous metals - also called metallic glasses - can be obtained during the casting process by rapidly cooling a metallic melt. Due to the rapid cooling of the melt, the metal solidifies without forming regular crystalline lattice structures and/or grain and phase boundaries.
  • An amorphous metal is a metallic compound in which the individual atoms are not subject to long-range order, but only to short-range order.
  • Amorphous metals differ significantly from regular, i.e. crystallized, metals in their mechanical, electrical/electromagnetic and chemical properties.
  • Amorphous metal usually has greater hardness and strength as well as increased elasticity and flexibility.
  • amorphous metals can have high magnetic permeability and easy magnetization/demagnetization.
  • most amorphous metals prove to be particularly corrosion-resistant. Due to their extraordinary properties, amorphous metals are used, for example, in medical technology, aerospace technology and sports equipment or built into electric motors.
  • Amorphous metals are often produced in the form of thin films or ribbons that are less than a millimeter in diameter. However, in principle it is also possible to produce amorphous metals with diameters of over one millimeter. From a certain minimum diameter of the amorphous metal, such as > 1 mm, it is also referred to as metallic solid glass or bulk metallic glass (BMG).
  • BMG bulk metallic glass
  • inner cores or sliders with molding slopes or molding slopes are used in the prior art.
  • the use of inner cores or sliders with drafts means that the inner diameter of the cavity of the hollow body obtained is not constant. If a constant inner diameter of the cavity is desired, the body must be reworked accordingly.
  • Such post-processing is particularly complex due to the hardness of the amorphous metal.
  • the use of slanted inner cores limits the geometric shape and dimensions of the hollow body. In particular, the length or depth of the cavity is severely limited. For example, a tube made of amorphous metal can only be manufactured in very short lengths when using a slanted inner core or slide.
  • the use of a draft angle cannot always prevent the metal surface from being damaged during demoulding.
  • the material of the tool core influences the parameters of the casting process.
  • certain minimum parameters must be maintained to ensure smooth production of a shaped piece.
  • the tool must be pre-tempered in a certain way to take the thermal expansion coefficient of the core material into account.
  • the pre-temperature should not be significantly below 200°C in order not to make demoulding even more difficult after the melt has cooled.
  • the object of the present invention is to provide an improved, at least alternative, method for producing hollow bodies made of amorphous metal.
  • the inventors have surprisingly found that the unattached attachment of a separating element to a tool core significantly simplifies the demoulding of a cast hollow body made of amorphous metal.
  • the arrangement of the separating element on the lateral surface of the inner core results in reduced or no tension and/or contact between the amorphous metal and the inner core. Tension and/or contact exists primarily between the amorphous metal and the separation element.
  • the separating element remains on the inside or inner wall of the hollow body and can then be removed.
  • the use of the separating element enables the hollow body to be produced from amorphous metal with less preheating of the tool, for example to a tool temperature of below 150 ° C.
  • the solidified amorphous metal on the inner core could break with such a weakly preheated tool.
  • a reduced tool temperature is also advantageous for the rapid cooling of the melt to the amorphous metal.
  • a high tool temperature (as would be necessary without a separating element) would lead to slower cooling, which in turn could promote undesirable crystallization of the metal.
  • fewer leaks and/or stresses occur in the tool.
  • Another aspect of the present disclosure relates to a hollow body made of amorphous metal, wherein the cavity of the hollow body has a length in the range of 1 to 40 cm, preferably in the range of 2 to 30 cm, more preferably in the range of 4 to 20 cm, and most preferably in the range of 6 to 10 cm.
  • the method includes a step a): Providing a metallic composition that is suitable for producing amorphous metal.
  • Metallic compositions that are suitable for producing amorphous metals are well known to those skilled in the art. Such metallic compositions are, for example, Chapter 1 from “Bulk Metallic Glasses - An Overview", Springer, 2009 , described.
  • the metallic composition according to step a) can be a composition of at least three elements, preferably of at least three metals. It is preferred that the at least three elements have a difference in atomic radius of more than 10%, preferably more than 12%. In a preferred embodiment, the at least three elements are selected from the group consisting of iron, palladium, platinum, tin, silicon, gallium, cobalt, zirconium, copper, aluminum, hafnium, nickel, niobium and titanium, more preferably consisting of zirconium, copper , aluminum, hafnium, nickel, niobium and titanium.
  • the metallic composition according to step a) is a zirconium-based alloy, which preferably comprises several elements selected from the group consisting of copper, aluminum, hafnium, nickel, niobium and titanium.
  • a "zirconium-based alloy” is an alloy that has at least 40% by weight, preferably 60% by weight, of zirconium.
  • the metallic composition according to step a) comprises or consists of 58 to 77% by weight of zirconium, 0 to 3% by weight of hafnium, 20 to 30% by weight of copper, 2 to 6% by weight of aluminum, and 1 to 3% by weight of niobium.
  • the metallic composition according to step a) comprises or consists of 54 to 76% by weight of zirconium, 2 to 5% by weight of titanium, 12 to 20% by weight of copper, 2 to 6% by weight of aluminum, and 8 to 15% by weight nickel.
  • the sum of the chemical elements is 100%.
  • the remainder then contains zirconium. Common impurities may be present in the alloy.
  • the metallic composition according to step a) is a copper-based alloy, which preferably comprises several elements selected from the group consisting of zirconium, nickel, tin, silicon and titanium.
  • a "copper-based alloy” is an alloy that has at least 40% by weight, preferably 60% by weight, of copper. Suitable copper-based alloys are, for example, in EP 3444370 A1 described.
  • the metallic composition according to step a) has a difference between the crystallization temperature Tx and the glass transition temperature Tg of at least 30 ° C, preferably at least 40 ° C, more preferably at least 50 ° C, and most preferably in the range from 50 to 80°C.
  • the metallic composition according to step a) has a difference between the crystallization temperature Tx and the glass transition temperature Tg in the range from 30 to 150 ° C, preferably in the range from 40 to 120 ° C, and most preferably in the range from 50 to 80°C.
  • the composition according to step a) can also have a liquidus temperature T L in the range from 700 to 1200 ° C, preferably in the range from 750 to 1000 ° C.
  • the composition according to step a) can be in the range from 600 to 1000 ° C, preferably in the range from 700 to 950 ° C.
  • the method further comprises a step b): melting the composition according to step a) to obtain a melt.
  • Step b) is not limited to a specific melting device, heat source or melting parameters. Rather, the person skilled in the art will select a suitable device and heat source as well as the parameters of the melting process according to his needs and with regard to the metallic composition used according to step a).
  • a protective gas atmosphere is preferably used in order to avoid oxidation of the metallic melt by oxygen.
  • the protective gas atmosphere can be maintained until the melt cools in step d).
  • a suitable protective gas is, for example, argon.
  • the atmosphere can be evacuated before the protective gas is introduced.
  • the inner core can in principle have any shape that is suitable for designing a tool inner core.
  • the inner core can have the shape of a cylinder, a triangular prism, a cuboid, a disk or a stepped pyramidal structure.
  • the inner core preferably has the shape of a cylinder or a cuboid,
  • the inner core is a cylindrical inner core.
  • the cylindrical inner core can have the shape of an elliptical cylinder, a circular cylinder or an angular cylinder. It is preferred that the inner core has the shape of a circular cylinder. In a particularly preferred embodiment, the cylindrical inner core is a straight circular cylindrical inner core.
  • the arrangement of the inner core in the casting mold in step c) can be adapted to the desired shape of the cast hollow body.
  • the inner core can be arranged to form a bore, an inner contour or a piercing of the fitting.
  • the inner core can have a draft angle. Draft angles are known to those skilled in the art. A draft angle is a slope that is added to a surface that is arranged parallel to the direction of release of the molding. A draft angle is added to a fitting to make demolding easier. Depending on the shape of the fitting, a draft angle can have an angle in the range of 0.1 to 10°. In one embodiment of the present invention, the inner core has a draft angle of less than 0.2°.
  • the inner core has no draft angle.
  • the inner core has a constant diameter.
  • the cylindrical inner core has no draft angle.
  • the cylindrical inner core has a constant diameter.
  • the inner core can have a diameter in the range of 5 to 100 mm, preferably in the range of 5 to 50 mm, more preferably in the range of 5 to 25 mm, and/or a
  • Length in the range of 1 to 40 cm preferably in the range of 2 to 20 cm, more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the dimensions defined here such as length and diameter of the inner core, always refer to the shaping part of the inner core.
  • the inner core may also have two or more different diameters in a stepped form. Undercuts in the outer diameter of the inner core are also possible. In such a case, the specialist can adapt the tool accordingly.
  • the inner core may preferably have a constant diameter in the range from 5 to 100 mm, preferably in the range from 5 to 50 mm, more preferably in the range from 5 to 25 mm, and/or the core may have a length in the range from 1 to 40 cm, preferably in the range of 2 to 20 cm, more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the inner core may particularly preferably have a length in the range of 1 to 40 cm, preferably in the range of 2 to 20 cm, even more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the cylindrical inner core can particularly preferably have a constant diameter in the range of 5 to 100 mm, preferably in the range of 5 to 50 mm, even more preferably in the range of 5 to 25 mm, and / or the core can have a length in the range of 1 to 40 cm, preferably in the range of 2 to 20 cm, and more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the cylindrical inner core is preferably a circular cylindrical inner core, the circular cylinder having a constant diameter in the range of 5 to 100 mm, preferably in the range of 5 to 50 mm, more preferably in the range of 5 to 25 mm, and/or wherein the core a length in the range of 1 to 40 cm, preferably in the range of 2 to 20 cm, and more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the inner core can be made of any material suitable for use in a metal casting mold.
  • the inner core can be made of steel.
  • the inner core can be part of a slider. Sliders are known to those skilled in the art.
  • the separating element particularly preferably has the shape of a sleeve.
  • the separating element is particularly preferably a copper sleeve.
  • the separating element can have a wall thickness in the range of 0.5 to 5 mm, preferably in the range of 1 to 3 mm, and/or a length in the range of 1 to 40 cm, preferably in the range of 2 to 20 cm, even more preferably in the range from 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the separating element can have the shape of a straight hollow cylinder, the hollow cylinder having a wall thickness in the range of 0.5 to 5 mm, preferably in the range of 1 to 3 mm, and/or the hollow cylinder having a length in the range of 1 to 40 cm, preferably in the range of 2 to 20 cm, more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the inner diameter of the separating element is preferably adapted to the diameter of the inner core.
  • the separating element can have a demolding slope.
  • the inner core has a draft angle of less than 0.2°.
  • the separating element has no draft angle.
  • the separating element has a constant outside diameter.
  • neither the separating element nor the inner core has a draft angle.
  • the separating element encloses at least a portion of the lateral surface of the inner core.
  • the separating element in step c) encloses the entire surface area of the inner core.
  • a separating element can be used that encloses the entire cylindrical lateral surface of the inner core. It is also possible for the separating element to enclose the entire shaping part of the inner core.
  • the separating element is designed and arranged on the lateral surface of the inner core in such a way that the melt in step c) does not come into contact with the lateral surface of the inner core. It is also possible for the separating element to be designed and arranged on the inner core in such a way that the melt does not come into contact with the inner core in step c).
  • the material of the separating element is not limited to a specific material.
  • the separating element may include or consist of a non-metallic material.
  • the separating element may comprise or consist of graphite.
  • the separating element can comprise or consist of a metal or an alloy.
  • the separating element preferably consists of a metal or an alloy.
  • Preferred metals or alloys are selected from the group consisting of copper, copper alloys, aluminum, aluminum alloys, unalloyed and low-alloy steel, zinc and zinc alloys.
  • the separating element comprises, or consists of, copper or a copper alloy.
  • the person skilled in the art is familiar with the terms "unalloyed” and "low-alloyed steel".
  • a low-alloy steel can, for example, be a steel in which the sum of the alloying elements does not exceed 6.0% by weight.
  • the material of the separating element can have a certain thermal conductivity.
  • a material with a high thermal conductivity is particularly suitable for facilitating the rapid cooling of the melt below the glass transition temperature Tg.
  • the separating element preferably comprises or consists of a material that has a thermal conductivity ⁇ of greater than 100 W/mK, preferably greater than 200 W/mK, and more preferably in the range from 200 to 450 W/mK.
  • the material of the separating element can also have a certain coefficient of thermal expansion.
  • the separating element preferably comprises or consists of a material which has a coefficient of linear thermal expansion ⁇ (at 20 ° C) of greater than 10*10 -6 /K, preferably greater than 15*10 -6 /K, and more preferably in the range of 15*10 -6 /K to 40 *10 -6 /K.
  • the material of the separating element can have a thermal linear expansion coefficient ⁇ (at 20 ° C) less than or equal to the thermal linear expansion coefficient of the inner core.
  • the material of the separating element can have a different thermal linear expansion coefficient ⁇ (at 20 ° C) compared to the material of the inner core.
  • the separation element and the inner core can form a thermal misfit , which facilitates demoulding.
  • the inventors have found that the different thermal expansion coefficients can lead to a lower tension between the separating core and the inner core after the tool components have cooled.
  • the cast hollow body including the sleeve can shrink from the inner core as a result of cooling. This makes removing the hollow body from the mold even easier, since even less force is required to remove the inner core from the recess in the hollow body.
  • the method includes a step before step b) or c) in which the separating element is pushed onto the inner core.
  • the inner core with the attached separating element can then be arranged in the mold.
  • a hollow cylindrical separating element is pushed onto a cylindrical inner core in this step.
  • the cavity of the casting mold in step c) determines the shape of the cast hollow body.
  • the cavity can have a shape that is suitable for casting a hollow body with a cavity, the cavity being a bore, an inner contour or a penetration.
  • the cavity preferably has a shape that is suitable for casting a pipe.
  • the person skilled in the art will design the shape and dimensions of the cavity by selecting the inner core, the separating element and the mold so that a hollow body made of amorphous metal with a desired shape is obtainable.
  • the mold can also have several cavities, as described here, in order to cast several hollow bodies in one step.
  • illustration 1 shows an example of the cross section of a cylindrical inner core (3), the entire shaping surface of which is surrounded by a hollow cylindrical separating element (2), the separating element being surrounded by the cooled amorphous metal (1).
  • the inner core is preferably made of steel, the separating element is made of copper and the amorphous metal is a tube based on a zirconium or copper alloy.
  • the method according to the invention comprises a step d): cooling the melt in the casting mold in order to obtain a shaped piece made of amorphous metal.
  • the mold has a significantly lower temperature than the melt. Therefore, to cool the melt to an amorphous metal, it may be sufficient to introduce the melt into the cavity of the mold.
  • the method according to the invention comprises a step e): removing the inner core and the separating element from the shaped piece after step d) in order to obtain a hollow body made of amorphous metal.
  • the separating element remains on the inside of the hollow body.
  • the separating element can then be removed mechanically. For example, the separating element can be rotated out of the cavity of the hollow body.
  • the separation element can be chemically treated, for example by an etching step. Chemical treatment by etching can be carried out, for example, on a separation element comprising or consisting of copper or a copper alloy. It is also possible to cut the separating element before removal in order to reduce the tension between the separating element and the hollow body.
  • the method according to the invention is a metal injection molding method.
  • the method according to the invention is a metal injection molding method for producing amorphous metals.
  • Metal injection molding processes are known in principle. Metal injection molding processes for producing amorphous metals have well-known differences to conventional metal injection molding processes. For example, no binder is used in the metal injection molding process and the debinding step is therefore eliminated.
  • the method according to the invention can include further method steps known in the prior art, such as a step for heat treating the hollow body and/or a step for cleaning the hollow body.
  • the method according to the invention is preferably designed so that a tube is produced.
  • the person skilled in the art knows which shapes of the inner core, the mold and the cavity are necessary for this.
  • Another aspect of the present disclosure relates to a hollow body made of amorphous metal, wherein the cavity of the hollow body has a length in the range of 1 to 40 cm.
  • Another aspect of the present disclosure relates to a hollow body made of amorphous metal, which is obtainable by the method according to the invention.
  • the method according to the invention makes it possible to obtain a hollow body made of amorphous metal with improved quality, in particular with improved quality of the inner surface of the hollow body, due to the simple demolding and/or the improved process parameters.
  • the process according to the invention can be used to obtain hollow bodies made of amorphous metal, the shape of which was previously not possible.
  • the cavity of the hollow body has a length in the range of 2 to 20 cm, more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm.
  • the cavity of the hollow body preferably has no draft angle.
  • the cavity of the hollow body preferably has a length in the range from 2 to 20 cm, more preferably in the range from 4 to 15 cm, and most preferably in the range from 6 to 10 cm, the cavity having no draft angle.
  • the cavity can, for example, have a length of 6 to 10 cm and no draft angle.
  • the cavity of the hollow body may have an inner diameter in the range of 5 to 100 mm, preferably in the range of 5 to 50 mm, more preferably in the range of 5 to 25 mm, and most preferably in the range of 5 to 20 mm. It is also possible for the cavity to have two or more different inside diameters in a stepped form.
  • the cavity of the hollow body has a constant inner diameter.
  • the cavity particularly preferably has a cylindrical shape. More preferably, the cavity of the hollow body has a cylindrical shape, with the cavity having a constant inner diameter.
  • the cavity of the hollow body can be a bore, an inner contour or a penetration.
  • the hollow body is not limited to a specific shape.
  • the hollow body is not limited in terms of its external shape.
  • the external shape, as well as the cavity of the mold, can be designed according to the specialist's own wishes and needs.
  • the hollow body is a hollow cylinder, preferably a hollow circular cylinder.
  • the hollow body is a tube.
  • the cavity of the tube preferably has no draft angle.
  • the hollow body is preferably a tube, the tube having a length in the range of 1 to 40 cm, preferably in the range of 2 to 20 cm, more preferably in the range of 4 to 15 cm, and most preferably in the range of 6 to 10 cm, and wherein the tube has a constant inner diameter in the range of 5 to 100 mm, preferably in the range of 5 to 50 mm, more preferably in the range of 5 to 25 mm, and most preferably in the range of 5 to 20 mm.
  • the tube can, for example, have a length of 6 to 10 cm and a constant inner diameter of 5 to 20 mm.
  • the tube can, for example, have a length in the range of 6 to 10 cm, a wall thickness in the range of 0.5 to 3 mm, and a constant inner diameter in the range of 5 to 20 mm.
  • the hollow body comprises or consists of a zirconium-based alloy, which preferably comprises a plurality of elements selected from the group consisting of copper, aluminum, hafnium, nickel, niobium and titanium.
  • the hollow body comprises or consists of a copper-based alloy, which preferably comprises a plurality of elements selected from the group consisting of zirconium, nickel, tin, silicon and titanium.
  • the hollow body comprises or consists of 58 to 77 wt.% zirconium, 0 to 3 wt.% hafnium, 20 to 30 wt.% copper, 2 to 6 wt.% aluminum, and 1 to 3 wt.% Niobium.
  • the hollow body comprises or consists of 54 to 76% by weight of zirconium, 2 to 5% by weight of titanium, 12 to 20% by weight of copper, 2 to 6% by weight of aluminum, and 8 to 15% by weight. % nickel. It is preferred that the sum of the chemical elements is 100%. The remainder then contains zirconium. Common impurities may be present in the alloy.
  • Figure 2 shows part of a tube made of amorphous metal with a copper sleeve in the cavity of the tube.
  • Figure 3 shows part of a tube made of amorphous metal with a slotted and partially pressed out copper sleeve.
  • a comparative test was carried out with an inner core made of steel without using a copper sleeve.
  • the steel core was directly overmolded with the melt at a tool temperature of approx. 200°C.
  • the cast pipe was cracked and the core could only be removed due to the damage to the pipe.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (12)

  1. Procédé de production d'un corps creux en métal amorphe (1), le procédé comprenant les étapes de :
    a) fourniture d'une composition métallique adaptée à la production de métal amorphe,
    b) fusion de la composition selon l'étape a) pour obtenir une masse fondue,
    c) introduction de la masse fondue après l'étape b) dans une cavité d'un moule,
    le moule comprenant un noyau interne (3),
    au moins une zone partielle de la surface latérale du noyau interne (3) étant entourée par un élément de séparation (2), et
    l'élément de séparation (2) n'étant pas fixé au noyau interne (3),
    d) refroidissement de la masse fondue dans le moule pour obtenir une pièce moulée en métal amorphe (1),
    e) retrait du noyau interne (3) et de l'élément de séparation (2) de la pièce moulée après l'étape d) pour obtenir un corps creux en métal amorphe (1).
  2. Procédé selon la revendication 1, dans lequel l'élément de séparation (2) est constitué d'un métal ou d'un alliage.
  3. Procédé selon la revendication 2, dans lequel le métal ou l'alliage est choisi dans le groupe constitué par le cuivre, les alliages de cuivre, l'aluminium, les alliages d'aluminium, les aciers non alliés et faiblement alliés, le zinc et les alliages de zinc, et de préférence dans le groupe constitué par le cuivre et les alliages de cuivre.
  4. Procédé selon l'une des revendications 1 à 3, dans lequel le procédé comprend, avant l'étape b) ou c), une étape dans laquelle l'élément de séparation (2) est poussé sur le noyau interne (3).
  5. Procédé selon l'une des revendications 1 à 4, dans lequel l'élément de séparation (2) à l'étape c) entoure la totalité de la surface latérale du noyau interne (3).
  6. Procédé selon l'une des revendications 1 à 5, dans lequel le noyau interne (3) et/ou l'élément de séparation (2) ne présentent pas de chanfrein de démoulage.
  7. Procédé selon l'une des revendications 1 à 6, dans lequel l'étape e) comprend les étapes de :
    e1) retrait du noyau interne de la pièce moulée après l'étape d) pour obtenir un corps creux en métal amorphe (1), lequel présente l'élément de séparation (2) sur sa face interne,
    e2) retrait de l'élément de séparation (2) de la face interne du corps creux.
  8. Procédé selon l'une des revendications 1 à 7, dans lequel le noyau interne (3) présente un diamètre dans la plage de 5 à 100 mm, de préférence dans la plage de 5 à 50 mm, plus préférablement dans la plage de 5 à 25 mm,
    et/ou dans lequel le noyau interne (3) présente une longueur dans la plage de 1 à 40 cm, de préférence dans la plage de 2 à 20 cm, plus préférablement dans la plage de 4 à 15 cm et de manière préférée entre toutes dans la plage de 6 à 10 cm.
  9. Procédé selon l'une des revendications 1 à 8, dans lequel le noyau interne (3) est un noyau interne (3) en forme de cylindre, de préférence un noyau interne en forme de cylindre circulaire, et plus préférablement un noyau interne en forme de cylindre circulaire droit, et
    l'élément de séparation (2) est un élément de séparation (2) en forme de cylindre creux, de préférence un élément de séparation en forme de cylindre creux circulaire, plus préférablement un élément de séparation en forme de cylindre creux circulaire droit.
  10. Procédé selon l'une des revendications 1 à 9, dans lequel la composition métallique selon l'étape a) est un alliage à base de zirconium qui comprend de préférence plusieurs éléments choisis dans le groupe constitué par le cuivre, l'aluminium, le hafnium, le nickel, le niobium et le titane, ou
    dans lequel la composition métallique selon l'étape a) est un alliage à base de cuivre qui comprend de préférence plusieurs éléments choisis dans le groupe constitué par le zirconium, le nickel, l'étain, le silicium et le titane.
  11. Procédé selon l'une des revendications 1 à 10, dans lequel le procédé est un procédé de moulage par injection de métal.
  12. Procédé selon l'une des revendications 1 à 11, dans lequel le moule, le noyau interne (3) et/ou l'élément de séparation (2) présentent, avant l'introduction de la masse fondue à l'étape c), une température dans la plage de 20 à 300 °C, de préférence dans la plage de 20 à 200 °C et de manière préférée entre toutes dans la plage de 50 à 140 °C.
EP20170051.5A 2020-04-17 2020-04-17 Procédé de fabrication d'un corps creux en métal amorphe Active EP3895827B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20170051.5A EP3895827B1 (fr) 2020-04-17 2020-04-17 Procédé de fabrication d'un corps creux en métal amorphe
PCT/EP2021/058883 WO2021209280A1 (fr) 2020-04-17 2021-04-06 Article creux en métal amorphe
US17/996,056 US20230201913A1 (en) 2020-04-17 2021-04-06 Hollow article made of amorphous metal
CN202180027282.2A CN115397580A (zh) 2020-04-17 2021-04-06 由无定形金属制成的中空制品

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20170051.5A EP3895827B1 (fr) 2020-04-17 2020-04-17 Procédé de fabrication d'un corps creux en métal amorphe

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EP3895827A1 EP3895827A1 (fr) 2021-10-20
EP3895827B1 true EP3895827B1 (fr) 2023-11-15

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US (1) US20230201913A1 (fr)
EP (1) EP3895827B1 (fr)
CN (1) CN115397580A (fr)
WO (1) WO2021209280A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3808167B2 (ja) * 1997-05-01 2006-08-09 Ｙｋｋ株式会社 金型で加圧鋳造成形された非晶質合金成形品の製造方法及び装置
JP2008100264A (ja) * 2006-10-20 2008-05-01 Tohoku Univ 急冷凝固金属製の中空体の製造方法および急冷凝固金属製の中空体の製造装置
JP5307640B2 (ja) * 2009-06-11 2013-10-02 オリンパス株式会社 鋳造用中子
EP3444370B1 (fr) 2017-08-18 2022-03-09 Heraeus Deutschland GmbH & Co. KG Alliage à base de cuivre destiné à la fabrication de verres métalliques solidifiés
CN108372278A (zh) * 2018-04-02 2018-08-07 广东劲胜智能集团股份有限公司 可控直径与壁厚的合金管材的制备方法和装置

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WO2021209280A1 (fr) 2021-10-21
EP3895827A1 (fr) 2021-10-20
CN115397580A (zh) 2022-11-25
US20230201913A1 (en) 2023-06-29

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