EP4293430A1 - Verfahren zur herstellung eines werkstücks aus mehreren edelmetallen und so erhaltenes werkstück - Google Patents

Verfahren zur herstellung eines werkstücks aus mehreren edelmetallen und so erhaltenes werkstück Download PDF

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Publication number
EP4293430A1
EP4293430A1 EP22179302.9A EP22179302A EP4293430A1 EP 4293430 A1 EP4293430 A1 EP 4293430A1 EP 22179302 A EP22179302 A EP 22179302A EP 4293430 A1 EP4293430 A1 EP 4293430A1
Authority
EP
European Patent Office
Prior art keywords
materials
powders
precious
sintering
alloys
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP22179302.9A
Other languages
English (en)
French (fr)
Inventor
Sandra GUADALUPE MALDONADO
Thibaut Le Loarer
Romain EPHERRE
Bastien Nodenot
Yannick BEYNET
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manufacture dHorlogerie Audemars Piguet SA
Norimat SAS
Original Assignee
Manufacture dHorlogerie Audemars Piguet SA
Norimat SAS
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.)
Filing date
Publication date
Application filed by Manufacture dHorlogerie Audemars Piguet SA, Norimat SAS filed Critical Manufacture dHorlogerie Audemars Piguet SA
Priority to EP22179302.9A priority Critical patent/EP4293430A1/de
Priority to PCT/IB2023/056127 priority patent/WO2023242751A1/fr
Publication of EP4293430A1 publication Critical patent/EP4293430A1/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/22—Materials or processes of manufacturing pocket watch or wrist watch cases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • 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
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0466—Alloys based on noble metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0015—Light-, colour-, line- or spot-effects caused by or on stationary parts
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0076—Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0074—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C27/00—Making jewellery or other personal adornments
    • A44C27/001—Materials for manufacturing jewellery
    • A44C27/002—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the present invention relates to a process for manufacturing a watch component based on several precious or noble metals or alloys of such metals, which are individually atomized into distinct powders before being jointly involved in a sintering operation, in in particular SPS sintering (spark plasma sintering) also known as flash sintering.
  • SPS sintering spark plasma sintering
  • flash sintering also known as flash sintering.
  • the different precious or noble metals can be distinguished from each other in the watch component thus obtained.
  • the present description further covers a watch component made up of several distinct precious metals, as well as a timepiece comprising such a component.
  • the document EP3822712 gives an example of a process based on metal powders for the design of a component for a timepiece.
  • the metals involved in the process are not limited to precious or noble metals and involve for example stainless steel or aluminum.
  • the sintering conditions are therefore not suitable for the production of components made of precious metals, distributed distinctly in the final part.
  • the sintering technique is an alternative to brazing or welding which has the advantage of limiting or avoiding the addition of material at the interfaces, as well as the mixing of the materials present. There is therefore scope to develop a process specifically adapted to precious materials, allowing a greater variety of their use and assembly.
  • An aim of the present invention is to propose a process specifically adapted to precious metals and their alloys, making it possible to manufacture a metal part, such as a watchmaking component, whose different metals are distinct from each other.
  • the process of the present description aims to assemble different precious metals without mixing them.
  • the present method proposes to avoid locally modifying the compositions during the production of the part.
  • Another aim of the invention is to produce a mechanical part, in particular a watch component, comprising or consisting of two or more precious metals or alloys of precious metals, which are distinct from each other.
  • a mechanical part or watch component preferably presents no concentration gradient of the different constituents at their interfaces or a minimal concentration gradient, for example over a thickness of less than 10 micrometers, or less than 5 micrometers or less than 1 micrometer.
  • This solution has in particular the advantage compared to the prior art of producing watch components based on precious metals and having an aesthetic appearance and/or particular mechanical properties due to the localized distribution of the different metals which they contain. constitute.
  • local variations in color and/or hardness can be produced directly in the mass of the component and without additional steps.
  • a first step S1 one of the materials M1 constituting the mechanical part is atomized in the form of a first powder P1.
  • the term “atomize” designates any suitable operation enabling the material in question to be reduced to a powder. It may consist of or include a grinding step.
  • the powder obtained can consist of more or less fine particles.
  • the particles are for example micrometric in size, i.e. with an average diameter of around 1 ⁇ m to 500 ⁇ m, or 10 to 100 ⁇ m.
  • the particles can alternatively be sub-micrometric, or with an average diameter of less than one micrometer.
  • the average particle size of the powder can be adapted depending on the material considered and/or the result to be obtained.
  • the method comprises a step S2 of atomizing a second material M2 making it possible to produce a second powder P2.
  • the atomization conditions may be identical or different from those of the atomization of the first material M1.
  • the average size of the particles forming the second powder P2 may be identical or similar to that forming the first powder P1.
  • particles of different sizes can constitute the first P1 and second P2 powders. It is understood that the steps of atomizing the first M1 and the second M2 material are carried out separately from each other, so that distinct powders P1, P2 are obtained. In particular, the process according to the present invention does not include any step of mixing these first P1 and second P2 powders.
  • the process according to the present invention includes all the provisions making it possible not to mix the first P1 and second P2 powders. It can even be planned that the first M1 and second M2 materials are atomized in different locations so as to avoid or limit contamination from one to the other. A device for tracing or monitoring the different materials and the different powders can also be set up. According to these provisions, the process may include steps of separate packaging, tracing and separate storage of materials and/or powders.
  • the step of atomizing the first material M1 can be carried out in parallel with that of the second material M2 or sequentially.
  • one or more of the materials used in the present process can be selected directly in the form of a powder so that the corresponding atomization steps S1, S2, Si, described here, are not necessary.
  • the first M1 and second M2 materials are both selected from precious metals or noble metals, or alloys based on such precious or noble metals.
  • Precious or noble metals include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), rhodium (Rh), scandium (Sc), ruthenium (Ru) osmium (Os) and iridium (Ir).
  • noble metals refer more particularly to metals that resist corrosion.
  • the terms “precious” and “noble” are interchangeable and equivalent, so that either of these terms designates the metals listed above.
  • the alloys of these precious metals comprise at least 50% by mass, or 80% or more, or even 95% by mass of one of these precious metals or a combination of these precious metals.
  • An alloy according to the present description may comprise a mixture of gold and silver together forming at least 50% by mass or 80% by mass or more of the mechanical part. This does not exclude more than two precious metals being combined to form an alloy. According to a particular embodiment, an alloy may consist exclusively of a combination of two or more of the precious metals listed above.
  • an alloy according to the present invention comprises one or more of the precious metals listed above and one or more other non-precious metals such as copper, tin, aluminum, zinc, titanium or nickel.
  • All 18ct gold alloys such as 1N to 5N gold can be considered as different materials M1, M2 and assembled in one piece. Other gold alloys can be considered depending on needs. In addition, different alloys based on precious metals other than gold can be considered, such as for example platinum-based alloys or palladium-based alloys.
  • Precious metals can independently of each other be used in different grades, such as 9 ct, 12 ct, 18 ct or 24 ct or in other grades.
  • the first M1 and second M2 materials are characterized by a melting temperature T1, T2 which is specific to them.
  • T1 melting temperature
  • the melting temperature of gold at atmospheric pressure is approximately 1064°C.
  • the melting temperatures of gold alloys are generally higher than this value.
  • the melting temperature of palladium is around 1554°C, that of platinum is around 1768°C, that of rubidium is around 39°C, that of scandium is around 1541°C.
  • C that of rhodium of the order of 1964°C, that of iridium of the order of 2446°C, that of ruthenium of the order of 2333°C and that of osmium of the order of 3033°C.
  • the method according to the present description comprises a step S3 of arranging the first P1 and second P2 powders in a sintering mold 2.
  • the first P1 and second P2 powders are arranged sequentially so as not to mix. They can each be arranged so as to form a bed of powder, or a mass of powder or in different arrangements such as in the form of lines, or figures geometric or random.
  • one or more of the first P1 and second P2 powders, and where appropriate additional Pi powders can be used several times, for example to form several clusters, or several lines or on several layers alternating with other powders.
  • the powders can be subjected to vibrations or any other operation allowing them to be densified or better distributed if necessary. It is then necessary to ensure that the first P1 and second P2 powders do not mix during these operations, if they take place.
  • the first P1 and second P2 powders can be used in variable proportions, for example in equal quantities so that the final mechanical part comprises as much of the first material M1 as of the second material M2, independently of their distribution.
  • the M1/M2 ratio of the first M1 and second M2 materials can for example vary from 10/90 to 90/10 or from 20/80 to 80/20. Ratios between 30/70 and 70/30 or 40/60 and 60/40 are of course possible.
  • the combination of powders forms an assembly A of unmixed powders.
  • the first P1 and second P2 powders are in contact with each other while each remaining localized in the specific locations determined during their arrangement in the mold 2.
  • a third powder consisting of a combination of the first P1 and second P2 powders, or other powders, can be added. Under these conditions, the third powder corresponds to an alloy of precious or noble metals as defined in the present description.
  • the sintering conditions involve a sintering temperature Tfri. They also include a sintering pressure Pfri, which may be a mechanical pressure.
  • the sintering temperature Tfri is determined so that none of the powders of the powder assembly A melt under the sintering conditions.
  • the appropriate sintering temperature Tfri can be evaluated as a function of the sintering pressure Pfri, so as not to reach or exceed, or remain below the melting temperatures T1 and T2 of the first M1 and second M2 materials at the pressure Pfri sintering.
  • the sintering temperature is determined so as to remain lower than the lowest of the melting temperatures T1, T2 of the first M1 and second M2 materials under the sintering conditions.
  • the sintering conditions are those of flash sintering, also known as SPS (spark plasma sintering) sintering.
  • SPS spark plasma sintering
  • the sintering temperature Tfri is less than 2000°C, even less than 1500°C, or even less than 1000°C.
  • the sintering temperature is for example between 600°C and 1600°C.
  • the sintering pressure Pfri can be between 20 and 180 N/mm 2 or between 50 and 100 N/mm 2 . Other pressure values may be preferred depending on the components selected and/or the required quality of the final mechanical part.
  • a solid part B is obtained on the basis of the assembly of powders A.
  • the solid part B is inhomogeneous and therefore locally has different compositions each corresponding to the first M1 and the second M2 materials used.
  • the essays local areas can therefore independently correspond to pure precious metals or to specific precious metal alloys.
  • the solid part B once obtained, is demolded in a step S5, so as to recover a demolded solid part C.
  • the demolded solid part C may correspond to the final component. However, it may be required that the demolded part C requires one or more subsequent interventions capable of improving its quality or aesthetic appearance or of modifying the part obtained to obtain the final component 1.
  • a rectification step S6 can for example allow to resize the demolded solid part C.
  • a machining step S7 can be carried out to modify the solid part C, resulting in particular in one or more holes, or grooves, or streaks, or any other removal of material. Machining can be carried out by any suitable technique, whether mechanical, laser, water jet or any equivalent.
  • One or more S8 finishing steps can also be considered. Other post-sintering transformations can be planned depending on needs.
  • FIG. 2 schematizes the process with an additional material Mi , atomized into an additional powder Pi in an additional atomization step Si .
  • the additional material(s) Mi are different from the first M1 and second M2 materials. They are, however, selected from the precious or noble metals mentioned above, or their combination.
  • the additional powder(s) Pi obtained are treated and handled under the conditions already described for the first P1 and second P2 powders. In particular, adequate arrangements are made so that they do not mix with other powders.
  • the additional material(s) can be selected directly in the form of powders. In this case, the corresponding atomization step(s) may not be useful.
  • the temperature and pressure conditions for sintering are those already mentioned for the assembly of at least two powders A.
  • the sintering temperature Tfri is determined so that none of the first M1, second M2 materials and additional materials Mi does not melt during sintering.
  • the solid part B' can be demolded to obtain a demolded solid part C'.
  • One or more of the post-unmolding operations S6, S7, S8 described above can be implemented, as illustrated in Figure 3 .
  • one or other of the first P1, second P2 powders and additional powders Pi can be additive with other materials such as pigments.
  • Such additives, if present, are preferably in quantities of less than 5%, or even less than 1% by mass.
  • a mechanical part 1 manufactured according to the process described above. It is in particular a metal part based on at least two precious or noble metals, or their alloys, or at least three precious or noble metals or their alloys.
  • a part based on precious or noble metals contains at least half of its mass one or more precious or noble metals.
  • the mechanical part comprises for 80% of its mass or more, or for 95% of its mass, one or more precious or noble metals, or their alloys.
  • the different precious or noble metals of such a piece are distinct from each other.
  • the mechanical part 1 can be characterized by different colors characteristic of the different precious or noble metals which constitute it. Patterns can thus appear such as a camouflage effect or geometric patterns. It can alternatively or in more characterized by different local mechanical properties, specific to the different precious or noble metals which compose it.
  • the distribution of the different precious or noble metals in the mechanical part is not limited.
  • the different precious and noble metals can be distributed in the form of superimposed layers, or in the form of clusters within the mechanical part, or according to any other arrangement determined during its manufacture.
  • One of the precious or noble metals may remain completely hidden from an observer, particularly in the case where it makes up the core of the piece or its internal part, covered by another precious or noble metal.
  • a mechanical part 1 comprises at least a first material M1 and a second material M2 forming an inseparable whole in which the at least first M1 and second M2 materials remain distinct from each other.
  • the mechanical part 1 may comprise one or more other additional materials Mi, different from the first M1 and the second M2 materials and also distinct from the other materials.
  • the first M1 and second M2 materials, as well as any additional materials Mi are selected from one of the precious or noble metals mentioned above or their alloys.
  • the mechanical part 1 can for example be a watch component such as a cog or any other part of a watch movement.
  • the mechanical part 1 is an ornamental or decorative component. It can be, for example, a watch case or a dial or any other element visible to a user.
  • the mechanical part 1 fully benefits from the advantages of the process described above, particularly suitable for arranging different precious metals within the same part and thus producing a wide variety of aesthetic effects.
  • a first 5N 18ct gold powder and a second 2N 18ct gold powder are successively stacked in an SPS sintering mold. Sintering is carried out at a temperature of 800°C and a pressure of 100MPa. The pellet obtained is demolded so as to obtain a middle part. All the materials measuring 18ct, the case thus obtained also measures 18ct.
  • a first 18ct 5N gold powder and a second 18ct yellow gold powder are successively stacked in an SPS sintering mold.
  • a third 950/1000 platinum powder is placed on the assembly of the first two powders.
  • Sintering is carried out at a temperature of 860°C and a pressure of 130MPa.
  • the pellet obtained is demolded then machined to obtain a bezel.
  • a part finishing step is carried out, during which the surface layer of 950/1000 platinum, less hard than the underlying layers, is decorated. The final piece is not titled.
  • a first 5N 18 ct gold powder, a second 2N 18 ct gold powder and an 18 ct white gold powder are distributed randomly in an SPS sintering mold so as to form clusters of powders. Sintering is carried out at a temperature of 790°C and a pressure of 80MPa. The pellet obtained is demolded to obtain a bezel whose pattern resembles a camouflage composed of yellow, pink and gray colors. All the materials grading 18ct, the final piece also grading 18ct.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Optics & Photonics (AREA)
  • Powder Metallurgy (AREA)
EP22179302.9A 2022-06-15 2022-06-15 Verfahren zur herstellung eines werkstücks aus mehreren edelmetallen und so erhaltenes werkstück Pending EP4293430A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22179302.9A EP4293430A1 (de) 2022-06-15 2022-06-15 Verfahren zur herstellung eines werkstücks aus mehreren edelmetallen und so erhaltenes werkstück
PCT/IB2023/056127 WO2023242751A1 (fr) 2022-06-15 2023-06-14 Procédé pour la fabrication d'une pièce à base de plusieurs métaux précieux et pièce résultante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22179302.9A EP4293430A1 (de) 2022-06-15 2022-06-15 Verfahren zur herstellung eines werkstücks aus mehreren edelmetallen und so erhaltenes werkstück

Publications (1)

Publication Number Publication Date
EP4293430A1 true EP4293430A1 (de) 2023-12-20

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EP22179302.9A Pending EP4293430A1 (de) 2022-06-15 2022-06-15 Verfahren zur herstellung eines werkstücks aus mehreren edelmetallen und so erhaltenes werkstück

Country Status (2)

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EP (1) EP4293430A1 (de)
WO (1) WO2023242751A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013123614A (ja) * 2011-12-16 2013-06-24 Nagahori Corp リング状装飾体
EP2728422A1 (de) * 2012-11-06 2014-05-07 The Swatch Group Research and Development Ltd. Geschweißte Bimetall-Uhrverkleidungskomponente
CH715336A2 (fr) * 2018-09-14 2020-03-31 Comadur Sa Procédé d'assemblage d'au moins deux éléments et composant d'habillage ainsi formé.
EP3766997A1 (de) 2019-07-18 2021-01-20 The Swatch Group Research and Development Ltd Herstellungsverfahren von edelmetall-legierungen, und so erhaltene edelmetall-legierungen
EP3822712A1 (de) 2019-11-13 2021-05-19 Rolex Sa Bauteil für uhr
FR3121375A1 (fr) * 2021-03-31 2022-10-07 Sintermat Procédé de fabrication de piece en métaux précieux à base de frittage SPS et piece en métaux précieux ainsi obtenue

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7359877B2 (ja) * 2019-06-19 2023-10-11 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 技術的及び／又は装飾的機能を有する機械部品のレーザビーム付加製造の方法、並びに技術的及び／又は装飾的機能を有する機械部品

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013123614A (ja) * 2011-12-16 2013-06-24 Nagahori Corp リング状装飾体
EP2728422A1 (de) * 2012-11-06 2014-05-07 The Swatch Group Research and Development Ltd. Geschweißte Bimetall-Uhrverkleidungskomponente
CH715336A2 (fr) * 2018-09-14 2020-03-31 Comadur Sa Procédé d'assemblage d'au moins deux éléments et composant d'habillage ainsi formé.
EP3766997A1 (de) 2019-07-18 2021-01-20 The Swatch Group Research and Development Ltd Herstellungsverfahren von edelmetall-legierungen, und so erhaltene edelmetall-legierungen
EP3822712A1 (de) 2019-11-13 2021-05-19 Rolex Sa Bauteil für uhr
FR3121375A1 (fr) * 2021-03-31 2022-10-07 Sintermat Procédé de fabrication de piece en métaux précieux à base de frittage SPS et piece en métaux précieux ainsi obtenue

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