EP3121297A1 - Method for obtaining a trim component in platinum alloy - Google Patents

Method for obtaining a trim component in platinum alloy Download PDF

Info

Publication number
EP3121297A1
EP3121297A1 EP16177653.9A EP16177653A EP3121297A1 EP 3121297 A1 EP3121297 A1 EP 3121297A1 EP 16177653 A EP16177653 A EP 16177653A EP 3121297 A1 EP3121297 A1 EP 3121297A1
Authority
EP
European Patent Office
Prior art keywords
hardness
semi
finished product
alloy
process according
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.)
Granted
Application number
EP16177653.9A
Other languages
German (de)
French (fr)
Other versions
EP3121297B1 (en
Inventor
Fréderic Diologent
Damien Colas
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.)
Richemont International SA
Original Assignee
Cartier International AG
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 Cartier International AG filed Critical Cartier International AG
Publication of EP3121297A1 publication Critical patent/EP3121297A1/en
Application granted granted Critical
Publication of EP3121297B1 publication Critical patent/EP3121297B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
    • 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
    • C22C5/04—Alloys based on a platinum group metal

Definitions

  • the present invention relates to a method for obtaining a platinum alloy ornament component containing at least 80% by weight of platinum, having a particularly high hardness and can be machined by the usual methods.
  • the component is intended for applications in watchmaking, jewelery, jewelery, eyewear, writing instruments, luxury accessories, and other decorative or functional applications in which the visual aspect is also important.
  • the document EP0621349 describes a process for curing platinum at the surface by a surface layer containing boron.
  • the process described only allows the treatment of a finished part, and tends to affect the aesthetic aspect of the latter (hue and temperature).
  • the surface can be damaged. Refurbishment or refurbishment of such a room requires a specific post-restoration process that can be conducted only under very specific conditions and is therefore not within the reach of restoration workshops equipped with conventional means.
  • the document GB2279967 proposes a high purity platinum alloy containing cerium in a small amount.
  • This alloy makes it possible to achieve hardness comparable to, or even slightly greater than, that of a standard platinum alloy.
  • cerium is a very sensitive element to oxidation, the preparation of the alloy must be carried out under vacuum or under an inert gas, making the process complex.
  • cerium has a medium solid solubility in platinum, which also limits the homogeneity of the alloy obtained.
  • the document GB578956 proposes a platinum alloy cured by the addition of oxides by means of a sintering process.
  • the process is complex and is dependent on the size of the powders and the homogeneity of the compound to be obtained.
  • the document JP1988145759 proposes a platinum alloy containing in particular iron, palladium and copper, and the hardening is obtained in part by a plastic deformation operation to the shape of the part to be obtained and by a heat treatment operation after the steps of setting in shape.
  • This solution is therefore limited on the one hand by expensive matrix tools, and on the other hand by the heat treatment step which could promote recrystallization of the material, or even cause surface texture to appear.
  • the document EP0947595 discloses a platinum alloy cured by dispersion reinforcement. This alloy uses dispersion oxides to oxidize the non-noble metal. On the other hand, the dispersing elements tend not only to disadvantage the wear of the tools, but they also make difficult the polishing steps.
  • Heat treatment hardening processes on finished platinum alloy components are, on the other hand, known. They have the disadvantage that the grain structure is modified, which affects the texture of the polished surfaces.
  • EP2705170A1 proposes a process for obtaining a platinum alloy with very high hardness through an amorphous structure, namely a metal glass.
  • This high hardness involves a material and a method of shaping very particular and also require very specific tools and associated costs very high.
  • the application of this technology to a wide range of products, highly diversified in their geometries, is therefore not the most suitable from an industrial point of view.
  • the component obtained by the process of the invention has a hardness typically 25% to 50% higher than the hardness of the starting alloy.
  • the method makes it possible to obtain the component in its final form and hardness without the need for heat treatment on the final component to modify its hardness.
  • the purpose of the severe plastic deformation cycle (s) of the hardening step is to transform the crystallographic structure of the platinum alloy into an ultrafine grained ( UFG) structure.
  • ultrafine grain structure we mean a structure whose grain size is at least less than 1 ⁇ m in at least one grain orientation.
  • the grain size of the ultrafine grain structure may be less than 500 nm, and even less than 200 nm, see 100 nm.
  • the deformation (or the relative elongation, noted ⁇ ) can be up to 5, or more.
  • the alloy comprises at least 80.0% platinum and one or more of the following chemical elements: between 0% and 4% indium; between 0% and 6% ruthenium; between 0% and 5% copper; between 0% and 5% cobalt; between 0% and 20% of iridium; between 0% and 10% nickel; between 0% and 20% hafnium; between 0% and 20% tin; between 0% and 20% tungsten; between 0% and 15% of palladium; between 0% and 3% gallium; between 0% and 20% rhodium; between 0% and 20% scandium; between 0% and 8% of tungsten; and between 0% and 5% gold.
  • the severe plastic deformation cycle (s) can be realized using one of the methods, or a combination of these methods, including: equal channel angular pressing (ECAP ), angular extrusion according to equal channels (ECAP- accordance), high pressure torsion (high pressure torsion tube twisting orhigh pressure, HPT or HPTT), accumulative roll-bonding (accumulative roll bonding, ARB), repetitive corrugation and straightening (straightening and repetitive corrugation, RCS) , asymmetric rolling (asymmetric rolling, ASR), cyclic extrusion-compression (cyclic extrusion compression CEC), roll drawing (rotary swaging), or any other suitable method for obtaining said ultrafine-grained structure.
  • ECAP equal channel angular pressing
  • ECAP- accordance high pressure torsion
  • HPT or HPTT high pressure torsion tube twisting orhigh pressure, HPT or HPTT
  • accumulative roll-bonding accumulative roll bonding
  • ARB repetitive corrugation and straightening
  • RCS
  • the method comprises a step of shaping the alloy so as to give the semi-finished product a particular shape.
  • the semi-finished product may take the form of a plate, a bar, an ingot, a billet, or any other advantageous form for the subsequent machining step.
  • the method also comprises a step comprising one or more heat recovery treatments.
  • Restoration heat treatment can be performed after the severe plastic deformation cycle, or between severe plastic deformation cycles.
  • the parameters of the recovery heat treatment are adjusted so as not to completely relax the platinum alloy, so as not to degrade the second hardness obtained during the work hardening step.
  • the (or) heat recovery treatment is performed at a temperature below 600 ° C beyond which the mechanical properties of the alloy drop rapidly and the ductility increases.
  • the heat treatment (s) is preferably carried out at a temperature above 250 ° C and below 600 ° C. Indeed, below 250 ° C, the restoration heat treatment may have little or no effect for treatment times that are less than 1 hour, the thermal activation is not sufficient.
  • the figure 1 reports the evolution of the elastic limit (Rm in MPa) and the maximum stress (Rp0.2 in MPa) for an alloy comprising at least 80.0% platinum as a function of temperature.
  • the figure 2 reports the evolution of the hardness (HV) of the same alloy as a function of temperature.
  • the (or) heat treatment of restoration is preferably carried out at a temperature between 250 ° C and 500 ° C, or even between 250 ° C and 400 ° C.
  • the recovery heat treatment time may be one hour or less than one hour.
  • the process comprises one or more heat treatment cures.
  • the heat treatment or treatments for hardening further increase the second hardness of the semi-finished product by the precipitation of the alloying elements.
  • the process of the invention provides the semi-finished product with a second hardness which is at least 25% and even 50% higher than the first hardness of the starting alloy.
  • the machining step may include a material removal process such as turning, milling, grinding, spark erosion, cutting, laser or water jet cutting, or any other suitable method.
  • the machining step may also include a method of shaping by deformation or assembly.
  • the machining step can also include one or more finishing treatments, such as machining, satin finishing, polishing, sanding, microbilling, etching or any other suitable mechanical process.
  • the machining step makes it possible to obtain the component in its final shape and hardness. It is therefore not necessary to perform heat treatment on the component obtained by the present process to modify its hardness. Indeed, the second hardness obtained for the semi-finished product by the hardening step corresponds to the desired hardness of the component.
  • the ornamentation component may comprise a watch component, for example a component of the movement, the bracelet or a dressing component such as the case, the bezel, the bottom.
  • the ornamentation component may also include a component for jewelery, eyewear, writing instruments, luxury accessories (key chains, lighters, cufflinks, tie bars, etc.) and others. decorative or functional applications in which the visual aspect is also important.
  • an alloy comprising about 95% platinum and about 5% ruthenium, having a first nominal hardness of about 120Hv.
  • the alloy is subjected to the first shaping step and the work hardening step having at least one severe plastic deformation cycle, so as to increase the second hardness of the semi-finished product to a value of at least 250 Hv.
  • the cured semi-finished product has a second hardness of about 250 Hv.
  • the hardening step is performed by the high-pressure torsion method, the semi-finished product has a second hardness greater than 400 Hv.
  • an alloy comprising approximately 95% of platinum, between 1% and 4% of copper and between 1% and 4% of gallium (for a total of approximately 5% of copper and gallium) is provided.
  • first nominal hardness of at least 200Hv.
  • the semi-finished product when the work hardening step is performed by the accumulative bonding method, the semi-finished product has a second hardness of about 300 Hv.
  • the semi-finished product can then be subjected to a subsequent curing heat treatment step to increase the second hardness to about 400 Hv.
  • the hardening step comprising at least one severe plastic deformation cycle which may be followed by at least one heat recovery treatment, as described above.
  • the process for obtaining an ornamental component described herein applies to any alloy comprising at least 80% by weight platinum, and may contain one or more of the following chemical elements: between 0% and 4% indium; between 0% and 6% ruthenium; between 0% and 5% copper; between 0% and 5% cobalt; between 0% and 20% of iridium; between 0% and 10% nickel; between 0% and 20% hafnium; between 0% and 20% tin; between 0% and 20% tungsten; between 0% and 15% of palladium; between 0% and 3% gallium; between 0% and 20% rhodium; between 0% and 20% scandium; between 0% and 8% of tungsten; and between 0% and 5% gold.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Adornments (AREA)

Abstract

La présente invention concerne un procédé d'obtention d'un composant d'ornement en alliage comprenant au moins 80% massique de platine, le procédé comprenant: fournir un matériau brut comprenant au moins 80.0 % massique de platine et ayant une première dureté; réaliser une étape d'écrouissage de l'alliage, l'étape d'écrouissage comportant au moins un cycle de déformation plastique sévère de manière à obtenir un produit semi-fini dans lequel la structure cristallographique de l'alliage est transformée en une structure à grain ultrafins et ayant une seconde dureté, plus élevée que la première dureté; et réaliser une étape d'usinage du produit semi-fini.

Figure imgaf001
The present invention relates to a process for obtaining an alloy ornament component comprising at least 80% by weight of platinum, the process comprising: providing a raw material comprising at least 80.0% by weight of platinum and having a first hardness; performing a hardening step of the alloy, the work hardening step comprising at least one severe plastic deformation cycle so as to obtain a semi-finished product in which the crystallographic structure of the alloy is converted into a structure to ultrafine grain and having a second hardness, higher than the first hardness; and perform a machining step of the semi-finished product.
Figure imgaf001

Description

Domaine techniqueTechnical area

La présente invention concerne un procédé d'obtention d'un composant d'ornement en alliage de platine contenant au moins 80 % en poids de platine, ayant une dureté particulièrement élevée et pouvant être usiné par les méthode habituelles. Le composant est destiné à des applications dans l'horlogerie, la bijouterie, la joaillerie, la lunetterie, les instruments d'écriture, les accessoires de luxe, et autres applications décoratives ou fonctionnelles dans lesquelles l'aspect visuel est également important.The present invention relates to a method for obtaining a platinum alloy ornament component containing at least 80% by weight of platinum, having a particularly high hardness and can be machined by the usual methods. The component is intended for applications in watchmaking, jewelery, jewelery, eyewear, writing instruments, luxury accessories, and other decorative or functional applications in which the visual aspect is also important.

Etat de la techniqueState of the art

Dans les applications horlogères, bijouterie, lunetterie, et autres, il est courant de faire appel à des alliages de métaux précieux, notamment du platine, puisque les propriétés du métal précieux pur, comme le platine, n'est souvent pas satisfaisantes, notamment en raison d'une faible dureté ainsi qu'une brillance moyenne.In watchmaking, jewelery, eyewear and other applications, it is commonplace to use alloys of precious metals, especially platinum, since the properties of the pure precious metal, such as platinum, are often not satisfactory, especially in because of a low hardness and a medium gloss.

Le document EP0621349 décrit un procédé de durcissement du platine en surface par une couche superficielle contenant du Bore. Cependant, le procédé décrit ne permet le traitement que d'une pièce finie, et tend à affecter l'aspect esthétique de cette dernière (teinte et température). D'autre part, même durcie, la surface peut être endommagée. La remise en état ou le rafraîchissement d'une telle pièce nécessite un procédé post-restauration spécifique qui ne peut être conduit que dans des conditions très spécifiques et n'est donc pas à la portée des ateliers de restauration équipés de moyens conventionnels.The document EP0621349 describes a process for curing platinum at the surface by a surface layer containing boron. However, the process described only allows the treatment of a finished part, and tends to affect the aesthetic aspect of the latter (hue and temperature). On the other hand, even hardened, the surface can be damaged. Refurbishment or refurbishment of such a room requires a specific post-restoration process that can be conducted only under very specific conditions and is therefore not within the reach of restoration workshops equipped with conventional means.

Le document GB2279967 propose un alliage de platine à haut degré de pureté contenant du cérium en faible quantité. Cet alliage permet d'atteindre des duretés comparables, voire légèrement supérieures, à celle d'un alliage de platine standard. Le cérium étant un élément très sensible à l'oxydation, la préparation de l'alliage doit être effectuée sous vide ou sous un gaz inerte, rendant le procédé complexe. D'autre part, le cérium présente une solubilité solide moyenne dans le platine, ce qui limite aussi l'homogénéité de l'alliage obtenu.The document GB2279967 proposes a high purity platinum alloy containing cerium in a small amount. This alloy makes it possible to achieve hardness comparable to, or even slightly greater than, that of a standard platinum alloy. As cerium is a very sensitive element to oxidation, the preparation of the alloy must be carried out under vacuum or under an inert gas, making the process complex. On the other hand, cerium has a medium solid solubility in platinum, which also limits the homogeneity of the alloy obtained.

Le document GB578956 propose un alliage de platine durci par addition d'oxydes à l'aide d'un procédé de frittage. Le procédé est complexe et est dépendant de la dimension des poudres et de l'homogénéité du composé à obtenir.The document GB578956 proposes a platinum alloy cured by the addition of oxides by means of a sintering process. The process is complex and is dependent on the size of the powders and the homogeneity of the compound to be obtained.

Le document JP1988145759 propose un alliage de platine contenant notamment du fer, du palladium et du cuivre, et dont le durcissement est obtenu en partie par une opération de déformation plastique à la forme de la pièce à obtenir et par une opération de traitement thermique après les étapes de mise en forme. Cette solution est donc limitée d'une part par des outillages matriciels coûteux, et d'autre part par l'étape de traitement thermique qui pourrait favoriser une recristallisation de la matière, voire faire apparaître une texture en surface.The document JP1988145759 proposes a platinum alloy containing in particular iron, palladium and copper, and the hardening is obtained in part by a plastic deformation operation to the shape of the part to be obtained and by a heat treatment operation after the steps of setting in shape. This solution is therefore limited on the one hand by expensive matrix tools, and on the other hand by the heat treatment step which could promote recrystallization of the material, or even cause surface texture to appear.

Le document EP0947595 décrit un alliage de platine durci par renforcement par dispersion. Cet alliage fait appel à des oxydes de dispersion afin d'oxyder le métal non noble. D'autre part, les éléments de dispersion tendent non seulement à défavoriser l'usure des outils, mais ils rendent aussi difficiles les étapes de polissage.The document EP0947595 discloses a platinum alloy cured by dispersion reinforcement. This alloy uses dispersion oxides to oxidize the non-noble metal. On the other hand, the dispersing elements tend not only to disadvantage the wear of the tools, but they also make difficult the polishing steps.

Des procédés de durcissement par traitement thermique sur des composants en alliage de platine finis sont d'autre part connus. Ils présentent l'inconvénient que la structure des grains est modifiée, ce qui affecte la texture des surfaces polies.Heat treatment hardening processes on finished platinum alloy components are, on the other hand, known. They have the disadvantage that the grain structure is modified, which affects the texture of the polished surfaces.

Par ailleurs, des procédés de déformation plastique sévère appliqués à des matériaux non nobles, tels que l'aluminium, le titane ou encore le cuivre, pour augmenter leurs propriétés mécaniques sont connus. L'application de ces procédés aux métaux et alliages précieux n'est cependant pas connue.Moreover, methods of severe plastic deformation applied to non-noble materials, such as aluminum, titanium or copper, to increase their mechanical properties are known. The application of these processes to precious metals and alloys, however, is not known.

Enfin, le document EP2705170A1 propose un procédé permettant d'obtenir un alliage de platine à dureté très élevée par le biais d'une structure amorphe, à savoir un verre métallique. Cette dureté élevée implique cependant une matière et un procédé de mise en formes très particuliers et demandent par ailleurs des outillages très spécifiques et des coûts associés très élevés. L'application de cette technologie à une large gamme de produits, très diversifiés dans leurs géométries, n'est donc pas la plus adaptée d'un point de vue industriel.Finally, the document EP2705170A1 proposes a process for obtaining a platinum alloy with very high hardness through an amorphous structure, namely a metal glass. This high hardness, however, involves a material and a method of shaping very particular and also require very specific tools and associated costs very high. The application of this technology to a wide range of products, highly diversified in their geometries, is therefore not the most suitable from an industrial point of view.

Brève description des figuresBrief description of the figures

Des exemples de mise en oeuvre de l'invention sont indiqués dans la description illustrée par les figures annexées dans lesquelles :

  • la figure 1 reporte l'évolution de la limite d'élasticité et de la contrainte maximale pour un alliage comprenant au moins 80.0 % de platine en fonction de la température; et
  • figure 2 reporte l'évolution de la dureté du même alliage en fonction de la température.
Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:
  • the figure 1 reports the evolution of the elastic limit and the maximum stress for an alloy comprising at least 80.0% platinum as a function of temperature; and
  • figure 2 postpones the evolution of the hardness of the same alloy as a function of temperature.

Bref résumé de l'inventionBrief summary of the invention

L'invention concerne un procédé d'obtention d'un composant d'ornement comprenant au moins 80% massique de platine, le procédé comprenant:

  • fournir un matériau brut comprenant au moins 80.0 % massique de platine et ayant une première dureté;
  • réaliser une étape d'écrouissage de l'alliage, l'étape d'écrouissage comportant au moins un cycle de déformation plastique sévère de manière à obtenir un produit semi-fini dans lequel la structure cristallographique de l'alliage est transformée en une structure à grain ultrafins et ayant une seconde dureté, plus élevée que la première dureté; et
  • réaliser une étape d'usinage du produit semi-fini pour obtenir le composant.
The invention relates to a process for obtaining an ornamental component comprising at least 80% by weight of platinum, the process comprising:
  • providing a raw material comprising at least 80.0 wt.% platinum and having a first hardness;
  • performing a hardening step of the alloy, the work hardening step comprising at least one severe plastic deformation cycle so as to obtain a semi-finished product in which the crystallographic structure of the alloy is converted into a structure to ultrafine grain and having a second hardness, higher than the first hardness; and
  • perform a machining step of the semi-finished product to obtain the component.

Le composant obtenu par le procédé de l'invention a une dureté typiquement de 25% à 50% plus élevée que la dureté de l'alliage de départ. Le procédé permet d'obtenir le composant dans sa forme et dureté finale sans qu'il soit nécessaire de réaliser de traitement thermique sur le composant final pour modifier sa dureté.The component obtained by the process of the invention has a hardness typically 25% to 50% higher than the hardness of the starting alloy. The method makes it possible to obtain the component in its final form and hardness without the need for heat treatment on the final component to modify its hardness.

Exemple(s) de mode de réalisation de l'inventionExample (s) of embodiment of the invention

Selon un mode de réalisation, un procédé d'obtention d'un composant d'ornement comprenant au moins 80% massique de platine, comprend les étapes de:

  • fournir un matériau brut comprenant au moins 80.0 % massique de platine et ayant une première dureté;
  • réaliser une étape d'écrouissage de l'alliage, l'étape d'écrouissage comportant au moins un cycle de déformation plastique sévère de manière à obtenir un produit semi-fini dans lequel la structure cristallographique de l'alliage est transformée en une structure à grain ultrafins et ayant une seconde dureté, plus élevée que la première dureté; et
  • réaliser une étape d'usinage du produit semi-fini afin d'obtenir le composant d'ornement.
According to one embodiment, a method for obtaining an ornamental component comprising at least 80% by weight of platinum, comprises the steps of:
  • providing a raw material comprising at least 80.0 wt.% platinum and having a first hardness;
  • performing a hardening step of the alloy, the work hardening step comprising at least one severe plastic deformation cycle so as to obtain a semi-finished product in which the crystallographic structure of the alloy is converted into a structure to ultrafine grain and having a second hardness, higher than the first hardness; and
  • perform a machining step of the semi-finished product to obtain the ornamental component.

Le ou les cycles de déformation plastique sévère de l'étape d'écrouissage ont pour but de transformer la structure cristallographique de l'alliage de platine en une structure à grain ultrafins (en anglais ultrafine grained, UFG). Par structure à grain ultrafins on entend une structure dont la taille des grains est au moins inférieure à 1 µm dans au moins une orientation du grain. Selon l'étape d'écrouissage, par exemple le nombre de cycles de déformation plastique sévère, la taille des grains de la structure à grain ultrafins peut être inférieure à 500 nm, et même inférieure à 200 nm, voir 100 nm.The purpose of the severe plastic deformation cycle (s) of the hardening step is to transform the crystallographic structure of the platinum alloy into an ultrafine grained ( UFG) structure. By ultrafine grain structure we mean a structure whose grain size is at least less than 1 μm in at least one grain orientation. Depending on the hardening step, for example the number of severe plastic deformation cycles, the grain size of the ultrafine grain structure may be less than 500 nm, and even less than 200 nm, see 100 nm.

Dans le cadre de la déformation plastique sévère, une très forte contrainte hydrostatique est introduite lors de la mise en oeuvre, retardant voire empêchant la localisation de la déformation et donc l'apparition de fissures. La déformation est plus homogène que pour les techniques conventionnelles telles que le laminage ou le tréfilage, où une texture liée à la direction de déformation subsiste. Dans les techniques de déformation à froid usuelles, le durcissement est engendré par la création de dislocations (sources de Frank-Read) qui vont s'empiler sur les joints de grains initiaux, pour progressivement former une structure de sous-joints (ou cellules) dont les parois contiennent une très grand densité de dislocations. Dans des matériaux ayant subi une déformation plastique sévère, la déformation est telle que de nouveaux grains sont formés, avec des joints de grains plus nets que les parois des cellules et contenant peu de dislocations. C'est la très grande densité de joints de grains qui induit les propriétés mécaniques des matériaux ayant subi une déformation plastique sévère. En déformation plastique sévère, il n'y a pas de variation de section ni d'épaisseur, donc le taux de déformation exprimé avec les calculs conventionnels serait nul. Or la déformation introduite est extrêmement grande. Par exemple, la déformation (ou l'allongement relatif, noté ε) peut aller jusqu'à 5, voire plus.In the context of severe plastic deformation, a very high hydrostatic stress is introduced during the implementation, delaying or even preventing the localization of the deformation and thus the appearance of cracks. The deformation is more homogeneous than for conventional techniques such as rolling or drawing, where a texture related to the deformation direction remains. In the usual cold deformation techniques, the hardening is generated by the creation of dislocations (Frank-Read sources) which will pile up on the initial grain boundaries, to progressively form a structure of sub-joints (or cells). whose walls contain a very high density of dislocations. In materials that have undergone severe plastic deformation, the deformation is such that new grains are formed, with grain boundaries sharper than the cell walls and containing few dislocations. It is the very high density of grain boundaries that induces the mechanical properties of materials that have undergone severe plastic deformation. In severe plastic deformation, there is no variation of section or thickness, so the rate of deformation expressed with conventional calculations would be zero. Now the deformation introduced is extremely large. For example, the deformation (or the relative elongation, noted ε) can be up to 5, or more.

Selon une forme d'exécution, l'alliage comprend au moins 80.0 % de platine et un ou plusieurs des éléments chimiques suivants: entre 0% et 4% d'indium; entre 0% et 6% de ruthénium; entre 0% et 5% de cuivre; entre 0% et 5% de cobalt; entre 0% et 20% d'iridium; entre 0% et 10% de nickel; entre 0% et 20% d'hafnium; entre 0% et 20% d'étain; entre 0% et 20% de tungstène; entre 0% et 15% de palladium; entre 0% et 3% de gallium; entre 0% et 20% de rhodium; entre 0% et 20% de scandium; entre 0% et 8% de tungstène; et entre 0% et 5% d'or.According to one embodiment, the alloy comprises at least 80.0% platinum and one or more of the following chemical elements: between 0% and 4% indium; between 0% and 6% ruthenium; between 0% and 5% copper; between 0% and 5% cobalt; between 0% and 20% of iridium; between 0% and 10% nickel; between 0% and 20% hafnium; between 0% and 20% tin; between 0% and 20% tungsten; between 0% and 15% of palladium; between 0% and 3% gallium; between 0% and 20% rhodium; between 0% and 20% scandium; between 0% and 8% of tungsten; and between 0% and 5% gold.

Le ou les cycles de déformation plastique sévère peuvent être réalisés à l'aide d'une des méthodes, ou une combinaison de ces méthodes, comprenant: l'extrusion angulaire à canaux égaux (equal channel angular pressing, ECAP), l'extrusion angulaire conforme à canaux égaux (ECAP-conform), torsion à haute pression (high pressure torsion orhigh pressure tube twisting, HPT ou HPTT), colaminage accumulatif (accumulative roll bonding, ARB), corrugation répétitive et redressage (repetitive corrugation and straightening, RCS), laminage asymétrique (asymmetric rolling, ASR), extrusion-compression cyclique (cyclic extrusion-compression, CEC), emboutissage à rouleau (rotary swaging), ou toute autre méthode appropriée pour obtenir ladite structure à grains ultrafins.The severe plastic deformation cycle (s) can be realized using one of the methods, or a combination of these methods, including: equal channel angular pressing (ECAP ), angular extrusion according to equal channels (ECAP- accordance), high pressure torsion (high pressure torsion tube twisting orhigh pressure, HPT or HPTT), accumulative roll-bonding (accumulative roll bonding, ARB), repetitive corrugation and straightening (straightening and repetitive corrugation, RCS) , asymmetric rolling (asymmetric rolling, ASR), cyclic extrusion-compression (cyclic extrusion compression CEC), roll drawing (rotary swaging), or any other suitable method for obtaining said ultrafine-grained structure.

Dans un mode de réalisation, le procédé comprend une étape de mise en forme de l'alliage de manière à donner au produit semi-fini une forme particulière. Par exemple, le produit semi-fini peut prendre la forme d'une plaque, d'une barre, d'un lingot, d'une billette, ou de toute autre forme avantageuse pour l'étape d'usinage subséquente.In one embodiment, the method comprises a step of shaping the alloy so as to give the semi-finished product a particular shape. For example, the semi-finished product may take the form of a plate, a bar, an ingot, a billet, or any other advantageous form for the subsequent machining step.

Selon une forme d'exécution, le procédé comporte également une étape comprenant un ou des traitements thermiques de restauration. Un traitement thermique de restauration peut être réalisé après le cycle de déformation plastique sévère, ou entre les cycles de déformation plastique sévère. Les paramètres du traitement thermique de restauration sont ajustés afin de ne pas relaxer complètement l'alliage de platine, de manière à ne pas dégrader la seconde dureté obtenue pendant l'étape d'écrouissage.According to one embodiment, the method also comprises a step comprising one or more heat recovery treatments. Restoration heat treatment can be performed after the severe plastic deformation cycle, or between severe plastic deformation cycles. The parameters of the recovery heat treatment are adjusted so as not to completely relax the platinum alloy, so as not to degrade the second hardness obtained during the work hardening step.

Selon une forme d'exécution, le (ou les) traitement thermique de restauration est réalisé à une température inférieure à 600°C au-delà de laquelle les propriétés mécaniques de l'alliage chutent rapidement et la ductilité augmente.According to one embodiment, the (or) heat recovery treatment is performed at a temperature below 600 ° C beyond which the mechanical properties of the alloy drop rapidly and the ductility increases.

Le (ou les) traitement thermique de restauration est préférablement réalisé à une température au-dessus de 250°C et inférieur à 600°C. En effet, au-dessous de 250°C, le traitement thermique de restauration peut n'avoir que peu ou pas d'effet pour des temps de traitement qui sont inférieurs à 1 h, l'activation thermique n'étant pas suffisante.The heat treatment (s) is preferably carried out at a temperature above 250 ° C and below 600 ° C. Indeed, below 250 ° C, the restoration heat treatment may have little or no effect for treatment times that are less than 1 hour, the thermal activation is not sufficient.

La figure 1 reporte l'évolution de la limite d'élasticité (Rm en MPa) et de la contrainte maximale (Rp0.2 en MPa) pour un alliage comprenant au moins 80.0 % de platine en fonction de la température. La figure 2 reporte l'évolution de la dureté (HV) du même alliage en fonction de la température.The figure 1 reports the evolution of the elastic limit (Rm in MPa) and the maximum stress (Rp0.2 in MPa) for an alloy comprising at least 80.0% platinum as a function of temperature. The figure 2 reports the evolution of the hardness (HV) of the same alloy as a function of temperature.

Comme ces figures suggèrent, le (ou les) traitement thermique de restauration est préférablement réalisé à une température entre 250°C et 500°C, voire entre 250°C et 400°C.As these figures suggest, the (or) heat treatment of restoration is preferably carried out at a temperature between 250 ° C and 500 ° C, or even between 250 ° C and 400 ° C.

Le temps de traitement thermique de restauration peut être d'une heure ou être inférieur à une heure.The recovery heat treatment time may be one hour or less than one hour.

Selon une autre forme d'exécution, le procédé comprend un ou plusieurs traitements thermiques de durcissement. Le ou les traitements thermiques de durcissement permettent d'augmenter encore la seconde dureté du produit semi-fini par la précipitation des éléments d'alliage.According to another embodiment, the process comprises one or more heat treatment cures. The heat treatment or treatments for hardening further increase the second hardness of the semi-finished product by the precipitation of the alloying elements.

Le procédé de l'invention permet d'obtenir le produit semi-fini avec une seconde dureté qui est s'au moins 25% et même de 50% plus élevée que la première dureté de l'alliage de départ.The process of the invention provides the semi-finished product with a second hardness which is at least 25% and even 50% higher than the first hardness of the starting alloy.

L'étape d'usinage peut comprendre un procédé d'enlèvement de matière tel que le tournage, le fraisage, la rectification, l'électroérosion, le découpage, le découpage par laser ou jet d'eau, ou tout autre procédé approprié. L'étape d'usinage peut aussi comprendre un procédé de mise en forme par déformation, ou par assemblage.The machining step may include a material removal process such as turning, milling, grinding, spark erosion, cutting, laser or water jet cutting, or any other suitable method. The machining step may also include a method of shaping by deformation or assembly.

L'étape d'usinage peut également comprendre un ou des traitements de finition, tels que l'usinage, le satinage, le polissage, le sablage, le microbillage, la gravure ou tout autre procédé mécanique adapté.The machining step can also include one or more finishing treatments, such as machining, satin finishing, polishing, sanding, microbilling, etching or any other suitable mechanical process.

L'étape d'usinage permet d'obtenir le composant dans sa forme et dureté finale. Il n'est donc pas nécessaire de réaliser de traitement thermique sur le composant obtenu par le présent procédé pour modifier sa dureté. En effet, la seconde dureté obtenue pour le produit semi-fini par l'étape d'écrouissage correspond à la dureté souhaitée du composant.The machining step makes it possible to obtain the component in its final shape and hardness. It is therefore not necessary to perform heat treatment on the component obtained by the present process to modify its hardness. Indeed, the second hardness obtained for the semi-finished product by the hardening step corresponds to the desired hardness of the component.

Le composant d'ornementation peut comprendre un composant horloger, par exemple un composant du mouvement, le bracelet ou un composant d'habillage tel que le boîtier, la lunette, le fond. Le composant d'ornementation peut également comprendre un composant pour la bijouterie, la joaillerie, la lunetterie, les instruments d'écriture, les accessoires de luxe (porte-clés, briquet, bouton de manchette, barrette de cravate, etc.) et autres applications décoratives ou fonctionnelles dans lesquelles l'aspect visuel est également important.The ornamentation component may comprise a watch component, for example a component of the movement, the bracelet or a dressing component such as the case, the bezel, the bottom. The ornamentation component may also include a component for jewelery, eyewear, writing instruments, luxury accessories (key chains, lighters, cufflinks, tie bars, etc.) and others. decorative or functional applications in which the visual aspect is also important.

Exemple 1Example 1

Dans ce premier exemple, on fourni un alliage comprenant environ 95 % de platine et environ 5% de ruthénium, ayant une première dureté nominale d'environ 120Hv.In this first example, there is provided an alloy comprising about 95% platinum and about 5% ruthenium, having a first nominal hardness of about 120Hv.

L'alliage est soumis à la première étape de mise en forme et à l'étape d'écrouissage comportant au moins un cycle de déformation plastique sévère, de sorte à augmenter la seconde dureté du produit semi-fini a une valeur d'au moins 250 Hv.The alloy is subjected to the first shaping step and the work hardening step having at least one severe plastic deformation cycle, so as to increase the second hardness of the semi-finished product to a value of at least 250 Hv.

Par exemple, lorsque l'étape d'écrouissage est réalisée par la méthode de colaminage accumulatif, le produit semi-fini durci a une seconde dureté d'environ 250 Hv. Lorsque l'étape d'écrouissage est réalisée par la méthode de torsion à haute pression, le produit semi-fini a une seconde dureté supérieure à 400 Hv.For example, when the work hardening step is performed by the accumulative bonding method, the cured semi-finished product has a second hardness of about 250 Hv. When the hardening step is performed by the high-pressure torsion method, the semi-finished product has a second hardness greater than 400 Hv.

Exemple 2Example 2

Dans ce premier exemple, on fourni un alliage comprenant environ 95 % de platine, entre 1 % et 4% de cuivre et entre 1 % et 4% de gallium (pour un total d'environ 5% de cuivre et gallium), ayant une première dureté nominale d'au moins 200Hv.In this first example, an alloy comprising approximately 95% of platinum, between 1% and 4% of copper and between 1% and 4% of gallium (for a total of approximately 5% of copper and gallium) is provided. first nominal hardness of at least 200Hv.

Par exemple, lorsque l'étape d'écrouissage est réalisée par la méthode de colaminage accumulatif, le produit semi-fini a une seconde dureté d'environ 300 Hv. Le produit semi-fini peut ensuite être soumis à une étape subséquente de traitement thermique de durcissement de manière à augmenter la seconde dureté à une valeur d'environ 400 Hv.For example, when the work hardening step is performed by the accumulative bonding method, the semi-finished product has a second hardness of about 300 Hv. The semi-finished product can then be subjected to a subsequent curing heat treatment step to increase the second hardness to about 400 Hv.

Exemple 3Example 3

Il s'agit du même alliage que dans l'exemple 2 mais dans lequel l'étape d'écrouissage est réalisée à l'aide de la méthode de torsion à haute pression, permettant au produit semi-fini d'avoir une seconde dureté entre 600 et 650 Hv.This is the same alloy as in Example 2 but in which the hardening step is carried out using the high pressure torsion method, allowing the semi-finished product to have a second hardness between 600 and 650 Hv.

L'étape d'écrouissage comportant au moins un cycle de déformation plastique sévère qui peut être suivi d'au moins un traitement thermique de restauration, tel que décrit ci-dessus.The hardening step comprising at least one severe plastic deformation cycle which may be followed by at least one heat recovery treatment, as described above.

Le procédé d'obtention d'un composant d'ornement décrit ici s'applique à tout alliage comprenant au moins 80% massique de platine, et pouvant contenir un ou plusieurs des éléments chimiques suivants: entre 0% et 4% d'indium; entre 0% et 6% de ruthénium; entre 0% et 5% de cuivre; entre 0% et 5% de cobalt; entre 0% et 20% d'iridium; entre 0% et 10% de nickel; entre 0% et 20% d'hafnium; entre 0% et 20% d'étain; entre 0% et 20% de tungstène; entre 0% et 15% de palladium; entre 0% et 3% de gallium; entre 0% et 20% de rhodium; entre 0% et 20% de scandium; entre 0% et 8% de tungstène; et entre 0% et 5% d'or.The process for obtaining an ornamental component described herein applies to any alloy comprising at least 80% by weight platinum, and may contain one or more of the following chemical elements: between 0% and 4% indium; between 0% and 6% ruthenium; between 0% and 5% copper; between 0% and 5% cobalt; between 0% and 20% of iridium; between 0% and 10% nickel; between 0% and 20% hafnium; between 0% and 20% tin; between 0% and 20% tungsten; between 0% and 15% of palladium; between 0% and 3% gallium; between 0% and 20% rhodium; between 0% and 20% scandium; between 0% and 8% of tungsten; and between 0% and 5% gold.

Claims (15)

Procédé d'obtention d'un composant d'ornement comprenant au moins 80% massique de platine, le procédé comprenant: fournir un matériau brut comprenant au moins 80.0 % massique de platine et ayant une première dureté; réaliser une étape d'écrouissage de l'alliage, l'étape d'écrouissage comportant au moins un cycle de déformation plastique sévère de manière à obtenir un produit semi-fini dans lequel la structure cristallographique de l'alliage est transformée en une structure à grain ultrafins et ayant une seconde dureté, plus élevée que la première dureté; et réaliser une étape d'usinage du produit semi-fini pour obtenir le composant. A process for obtaining an ornament component comprising at least 80% by weight of platinum, the process comprising: providing a raw material comprising at least 80.0 wt.% platinum and having a first hardness; performing a hardening step of the alloy, the work hardening step comprising at least one severe plastic deformation cycle so as to obtain a semi-finished product in which the crystallographic structure of the alloy is converted into a structure to ultrafine grain and having a second hardness, higher than the first hardness; and perform a machining step of the semi-finished product to obtain the component. Le procédé selon la revendication 1,
dans lequel ledit au moins un cycle de déformation plastique sévère est réalisé à l'aide de l'une des méthodes, ou une combinaison de ces méthodes, comprenant: l'extrusion angulaire à canaux égaux, le colaminage accumulatif, la torsion à haute pression, le matriçage rotationnel, l'extrusion-compression cyclique ou la corrugation et redressement répétés.The process according to claim 1,
wherein said at least one severe plastic deformation cycle is performed using one of the methods, or a combination thereof, comprising: equal channel angular extrusion, accumulative roll forming, high pressure twisting , rotational stamping, cyclic extrusion-compression, or repeated corrugation and straightening. Le procédé selon l'une des revendications précédentes, comprenant en outre au moins un traitement thermique de restauration, réalisé à la suite dudit au moins cycle de déformation plastique sévère.The method according to one of the preceding claims, further comprising at least one heat-recovery treatment carried out following said at least one severe plastic deformation cycle. Le procédé selon l'une des revendications 1 à 3 comprenant en outre au moins un traitement thermique de durcissement configuré pour augmenter encore la dureté du produit semi-fini durci par précipitation des éléments d'alliage.The method according to one of claims 1 to 3 further comprising at least one curing heat treatment configured to further increase the hardness of the semi-finished product cured by precipitation of the alloying elements. Le procédé selon l'une des revendications 1 à 5 dans lequel la taille de grain de l'alliage du produit semi-fini est inférieure à 1 µm, et préférablement inférieure à 500 nm.The method according to one of claims 1 to 5 wherein the grain size of the alloy of the semi-finished product is less than 1 μm, and preferably less than 500 nm. Le procédé selon l'une des revendications 1 à 5 dans lequel l'alliage contient, en poids, au moins 80.0 % de platine et un ou plusieurs des éléments chimiques suivants: entre 0% et 4% d'indium; entre 0% et 6% de ruthénium; entre 0% et 5% de cuivre; entre 0% et 5% de cobalt; entre 0% et 20% d'iridium; entre 0% et 10% de nickel; entre 0% et 20% d'hafnium; entre 0% et 20% d'étain; entre 0% et 20% de tungstène; entre 0% et 15% de palladium; entre 0% et 3% de gallium; entre 0% et 20% de rhodium; entre 0% et 20% de scandium; entre 0% et 8% de tungstène; et entre 0% et 5% d'or.The process according to one of claims 1 to 5 wherein the alloy contains, by weight, at least 80.0% platinum and one or more of the following chemical elements: between 0% and 4% indium; between 0% and 6% ruthenium; between 0% and 5% copper; between 0% and 5% cobalt; between 0% and 20% of iridium; between 0% and 10% nickel; between 0% and 20% hafnium; between 0% and 20% tin; between 0% and 20% tungsten; between 0% and 15% of palladium; between 0% and 3% gallium; between 0% and 20% rhodium; between 0% and 20% scandium; between 0% and 8% of tungsten; and between 0% and 5% gold. Le procédé selon l'une des revendications 1 à 6 dans lequel l'alliage contient, en massique, environ 95 % de platine et environ 5% de ruthénium et a une première dureté d'environ 120 Hv; et dans lequel, après l'étape d'écrouissage, le produit semi-fini a une dureté d'au moins 250 Hv.The method according to one of claims 1 to 6 wherein the alloy contains, by weight, about 95% platinum and about 5% ruthenium and has a first hardness of about 120 Hv; and wherein after the hardening step the semi-finished product has a hardness of at least 250 Hv. Le procédé selon la revendications 7,
dans lequel l'étape d'écrouissage est réalisée par la méthode de colaminage accumulatif, de sorte que le produit semi-fini a une dureté d'au moins 250 Hv.The process according to claim 7,
wherein the hardening step is performed by the accumulative bonding method, so that the semi-finished product has a hardness of at least 250 Hv. Le procédé selon la revendications 7,
dans lequel l'étape d'écrouissage est réalisée par la méthode de torsion à haute pression, de sorte que le produit semi-fini a une dureté supérieure à 400 Hv.The process according to claim 7,
wherein the hardening step is performed by the high pressure twisting method, so that the semi-finished product has a hardness greater than 400 Hv. Le procédé selon l'une des revendications 1 à 6 dans lequel l'alliage contient, en poids, environ 95 % de platine, environ 2% de cuivre et environ 3% de gallium et a une première dureté d'environ 200 Hv; et
dans lequel, après l'étape d'écrouissage, le produit semi-fini a une dureté d'au moins 300 Hv.The process according to one of claims 1 to 6 wherein the alloy contains, by weight, about 95% platinum, about 2% copper and about 3% gallium and has a first hardness of about 200 Hv; and
wherein after the hardening step the semi-finished product has a hardness of at least 300 Hv. Le procédé selon la revendications 10,
dans lequel l'étape d'écrouissage est réalisée par la méthode de colaminage accumulatif, de sorte que le produit semi-fini a une dureté d'au moins 300 Hv.The process according to claim 10,
wherein the hardening step is performed by the accumulative bonding method, so that the semi-finished product has a hardness of at least 300 Hv. Le procédé selon les revendications 4 et 11,
dans lequel, après le traitement thermique de durcissement le produit semi-fini a une dureté d'au moins 400 Hv.The process according to claims 4 and 11,
wherein after the curing heat treatment the semi-finished product has a hardness of at least 400 Hv. Le procédé selon la revendications 10,
dans lequel l'étape d'écrouissage est réalisée par la méthode de torsion à haute pression, de sorte que le produit semi-fini a une dureté d'au moins à 600Hv.The process according to claim 10,
wherein the hardening step is performed by the high pressure twisting method, so that the semi-finished product has a hardness of at least 600Hv. Le procédé selon l'une des revendications 1 à 13,
comprenant en outre une étape de mise en forme de l'alliage de manière à donner au produit semi-fini une forme spécifique, notamment d'une plaque, d'une barre, d'un lingot, ou d'une billette.The process according to one of claims 1 to 13,
further comprising a step of shaping the alloy so as to give the semi-finished product a specific shape, such as a plate, a bar, an ingot, or a billet. Utilisation du composant d'ornement obtenu par le procédé selon l'une des revendications 1 à 14 pour l'un des domaines suivants: horlogerie, bijouterie, joaillerie, lunetterie, instrument d'écriture, accessoire de luxe, ou applications décoratives. Use of the ornamental component obtained by the process according to one of claims 1 to 14 for one of the following fields: watchmaking, jewelery, jewelery, eyewear, writing instrument, luxury accessory, or decorative applications.
EP16177653.9A 2015-07-23 2016-07-01 Method for obtaining a trim component in platinum alloy Active EP3121297B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH10732015 2015-07-23

Publications (2)

Publication Number Publication Date
EP3121297A1 true EP3121297A1 (en) 2017-01-25
EP3121297B1 EP3121297B1 (en) 2020-12-16

Family

ID=53723960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16177653.9A Active EP3121297B1 (en) 2015-07-23 2016-07-01 Method for obtaining a trim component in platinum alloy

Country Status (1)

Country Link
EP (1) EP3121297B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107058788A (en) * 2017-04-12 2017-08-18 深圳市星光达珠宝首饰实业有限公司 A kind of polynary platinum-ruthenium alloys and preparation method thereof
CN107671159A (en) * 2017-10-18 2018-02-09 大连理工大学 The restricted molding die and crystal fining method of ultrasonic vibration assisted demoulding
CN107893201A (en) * 2017-11-17 2018-04-10 合肥工业大学 Reciprocal squeeze for preparing super fine crystal material turns round the isometrical angle manufacturing process of upsetting
WO2022074363A1 (en) * 2020-10-05 2022-04-14 Alloyed Limited A platinum alloy composition

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578956A (en) 1942-02-07 1946-07-18 Lodge Plugs Ltd Improvements relating to sparking plug electrodes
US4165983A (en) * 1977-02-23 1979-08-28 Johnson, Matthey & Co., Limited Jewelry alloys
JPS63145759A (en) 1986-12-09 1988-06-17 Citizen Watch Co Ltd Heat treatment of platinum alloy for ornamentation
EP0621349A1 (en) 1993-04-23 1994-10-26 Degussa Aktiengesellschaft Surface hardened platinum and palladium alloy articles and process for producing the same
GB2279967A (en) 1993-07-14 1995-01-18 Nagahori Kk Platinum alloy
US5846352A (en) * 1996-11-22 1998-12-08 Kretchmer; Steven Heat treatment of a platinum-gallium alloy for jewelry
EP0947595A2 (en) 1998-03-28 1999-10-06 W.C. Heraeus GmbH & Co. KG Process for preparing a welded workpiece, in particular a tube, from dispersion-hardened platinum material
US6562158B1 (en) * 1998-12-01 2003-05-13 Steven Kretchmer Heat-treatable platinum-gallium-palladium alloy for jewelry
WO2006024928A1 (en) * 2004-09-02 2006-03-09 University Of Cape Town Hardening of metal alloys
WO2012150558A1 (en) * 2011-05-02 2012-11-08 École Polytechnique Fédérale De Lausanne (Epfl) Platinum based alloys

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB578956A (en) 1942-02-07 1946-07-18 Lodge Plugs Ltd Improvements relating to sparking plug electrodes
US4165983A (en) * 1977-02-23 1979-08-28 Johnson, Matthey & Co., Limited Jewelry alloys
JPS63145759A (en) 1986-12-09 1988-06-17 Citizen Watch Co Ltd Heat treatment of platinum alloy for ornamentation
EP0621349A1 (en) 1993-04-23 1994-10-26 Degussa Aktiengesellschaft Surface hardened platinum and palladium alloy articles and process for producing the same
GB2279967A (en) 1993-07-14 1995-01-18 Nagahori Kk Platinum alloy
US5846352A (en) * 1996-11-22 1998-12-08 Kretchmer; Steven Heat treatment of a platinum-gallium alloy for jewelry
EP0947595A2 (en) 1998-03-28 1999-10-06 W.C. Heraeus GmbH & Co. KG Process for preparing a welded workpiece, in particular a tube, from dispersion-hardened platinum material
US6562158B1 (en) * 1998-12-01 2003-05-13 Steven Kretchmer Heat-treatable platinum-gallium-palladium alloy for jewelry
WO2006024928A1 (en) * 2004-09-02 2006-03-09 University Of Cape Town Hardening of metal alloys
WO2012150558A1 (en) * 2011-05-02 2012-11-08 École Polytechnique Fédérale De Lausanne (Epfl) Platinum based alloys
EP2705170A1 (en) 2011-05-02 2014-03-12 Ecole Polytechnique Fédérale de Lausanne (EPFL) Platinum based alloys

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BIGGS T ET AL: "THE HARDENING OF PLATINUM ALLOYS FOR POTENTIAL JEWELLERY APPLICATION", PLATINIUM METALS REVIEW, JOHNSON MATTHEY PLC, LONDON, GB, vol. 49, no. 1, 1 January 2005 (2005-01-01), pages 2 - 15, XP009055328, ISSN: 0032-1400, DOI: 10.1595/147106705X24409 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107058788A (en) * 2017-04-12 2017-08-18 深圳市星光达珠宝首饰实业有限公司 A kind of polynary platinum-ruthenium alloys and preparation method thereof
CN107671159A (en) * 2017-10-18 2018-02-09 大连理工大学 The restricted molding die and crystal fining method of ultrasonic vibration assisted demoulding
CN107671159B (en) * 2017-10-18 2020-02-18 大连理工大学 Limiting die pressing die for ultrasonic vibration assisted demoulding and grain refining method
CN107893201A (en) * 2017-11-17 2018-04-10 合肥工业大学 Reciprocal squeeze for preparing super fine crystal material turns round the isometrical angle manufacturing process of upsetting
WO2022074363A1 (en) * 2020-10-05 2022-04-14 Alloyed Limited A platinum alloy composition
GB2599462B (en) * 2020-10-05 2023-06-14 Anglo Platinum Marketing Ltd A platinum alloy composition

Also Published As

Publication number Publication date
EP3121297B1 (en) 2020-12-16

Similar Documents

Publication Publication Date Title
EP3121297B1 (en) Method for obtaining a trim component in platinum alloy
JP3083225B2 (en) Manufacturing method of titanium alloy decorative article and watch exterior part
EP3165622B1 (en) Method for manufacturing a gold alloy wire
EP1340832B1 (en) Thin products made of beta or quasi beta titanium alloys, manufacture by forging
EP2344290B1 (en) Method for forging a titanium alloy thermomechanical part
FR2595968A1 (en) PROCESS FOR FORMING IMPROVED SUPERPLASTIC ALUMINUM ALLOYS CONTAINING SCANDIUM
EP0148688A2 (en) Method for the thermomechanical treatment of superalloys to obtain structures with great mechanical characteristics
EP4038214A1 (en) Aluminum alloy precision plates
Lee et al. Novel forging technology of a magnesium alloy impeller with twisted blades of micro-thickness
FR2722510A1 (en) PROCESS FOR THE PREPARATION OF 718 ALLOY SHEETS AND FOR THE SUPERPLASTIC FORMING OF SAME
EP3674817A1 (en) Method for manufacturing a decorative item
Shantharaja Mechanical behaviour of pure aluminum processed by constrained groove pressing
Skrotzki et al. Severe Plastic Deformation of High-Entropy Alloys
EP3656245B1 (en) Gold based alloy comprising at least 990 per mille gold by weight, item of jewellery or watch comprising gold based alloy comprising at least 990 per mille gold by weight, and method of manufacturing said alloy
JP3118342B2 (en) Method of heating titanium and titanium alloy rolled material
CH715695A2 (en) Method of manufacturing a decorative item.
JP2003013159A (en) Fastener material of titanium alloy and manufacturing method therefor
CH715728A1 (en) Process for obtaining an 18-carat gold component for watch and jewelery dressing applications.
EP3250722A1 (en) Process for obtaining a low silicon aluminium alloy part
EP3862445A1 (en) Gold alloy and method for manufacturing same
CH715727B1 (en) Process for obtaining a micromechanical component in 18 carat gold alloy.
EP1051533A1 (en) Titanium alloy watch part
EP4273287A1 (en) Timepiece component made of polished titanium alloy
FR2711673A1 (en) Nickel-based superalloys with improved machinability.
EP3943630A1 (en) Cermet component for watchmaking or jewellery

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20170707

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180103

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20200430

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602016049757

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1345664

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210115

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: RICHEMONT INTERNATIONAL SA, CH

Free format text: FORMER OWNER: CARTIER INTERNATIONAL AG, CH

Ref country code: CH

Ref legal event code: NV

Representative=s name: P&TS SA, CH

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: RICHEMONT INTERNATIONAL SA

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210316

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210317

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1345664

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201216

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210316

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210416

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602016049757

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210416

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

26N No opposition filed

Effective date: 20210917

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210416

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210701

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20160701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230721

Year of fee payment: 8

Ref country code: CH

Payment date: 20230801

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230726

Year of fee payment: 8

Ref country code: DE

Payment date: 20230719

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201216