• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a pivot axis for a watch movement comprising at least one pivot (3) made of a first non-magnetic metal material (4) at at least one of its ends in order to limit its sensitivity to magnetic fields, at least the surface external of said pivot (3) being covered with a first layer (5) of a second material selected from the group comprising Ni, NiB and NiP, and preferably NiP chemical. At least the first layer (5) of the second material is at least partially covered with a second layer (6) of a third material selected from the group consisting of gold, silver, copper, platinum, rhodium , palladium and their alloys. The invention relates to the field of watch movements.
    公开号:CH712762A2
    申请号:CH00195/17
    申请日:2017-02-21
    公开日:2018-01-31
    发明作者:Fussinger Alexandre；Charbon Christian；Verardo Marco
    申请人:Nivarox-Far S A；
    IPC主号:
    专利说明:

    Description
    FIELD OF THE INVENTION [0001] The invention relates to a piece for a watch movement and in particular to an amagné-tick pivoting axis for a mechanical clockwork movement and more particularly to a balance shaft, a rod of anchor and a non-magnetic exhaust pinion.
    BACKGROUND OF THE INVENTION [0002] The manufacture of a clockwise pivoting pin consists, from a hardenable steel bar, of performing bar turning operations to define different active surfaces (bearing, shoulder, pivots, etc.). and then subjecting the neckline to heat treatment operations comprising at least one quenching to improve the hardness of the axis and one or more incomes to improve toughness. The heat treatment operations are followed by a rolling operation of the pivots of the axes, an operation consisting in polishing the pivots to bring them to the required dimensions. During the rolling operation the hardness as well as the roughness of the pivots are further improved.
    The pivot axes, for example the balance axes, conventionally used in mechanical watch movements are made in grades of free cutting steels which are generally mar-tensitic carbon steels including lead and sulphides. of manganese to improve their machinability. A steel of this type referred to as AP is typically used for these applications.
    This type of material has the advantage of being easily machinable, in particular to be able to bar-turning and has, after quenching and tempering treatments, high mechanical properties very interesting for the realization of axes of pivoting watchmakers. These steels have in particular after heat treatment a high hardness, to obtain a very good resistance to shocks. Typically the hardness of the pivots of an axis made of steel AP may reach a hardness exceeding 700 HV after heat treatment and rolling.
    Although providing satisfactory mechanical properties for horological applications described above, this type of material has the disadvantage of being magnetic and can disrupt the running of a watch after being subjected to a magnetic field, and in particular when this material is used for producing a balance shaft cooperating with a balance spring of ferromagnetic material. This phenomenon is well known to those skilled in the art. It should also be noted that these martensitic steels are also susceptible to corrosion.
    Attempts to overcome these disadvantages have been conducted with austenitic stainless steels which have the distinction of being non-magnetic ie paramagnetic or diamagnetic or antiferromagnetic type. However, these austenitic steels have a crystallographic structure that does not allow them to be hardened and to reach hardnesses and therefore impact strengths that are compatible with the requirements required for the realization of clockwise pivot axes. The axes obtained then have marks or severe damage in case of shocks which will then have a negative influence on the chronometry of the movement. One way to increase the hardness of these steels is work hardening, however this hardening operation does not allow to obtain hardnesses greater than 500 HV. Therefore, in the context of parts having pivots having a high impact resistance, the use of this type of steel remains limited.
    Another approach to try to overcome these disadvantages is described in EP 2 757 423. According to this approach, the pivot axes are made of cobalt or nickel alloy of the austenitic type and have an outer surface cured according to some depth. However, such alloys can be difficult to machine for the manufacture of pivot axes. In addition, they are relatively expensive because of the high price of nickel and cobalt. SUMMARY OF THE INVENTION [0008] The object of the present invention is to overcome the drawbacks mentioned above by proposing a pivot axis that makes it possible at the same time to limit the sensitivity to magnetic fields and to obtain mechanical properties that make it possible to meet the requirements. impact resistance in the watchmaking field.
    The invention also aims to provide a non-magnetic pivot axis that can be manufactured simply and economically.
    For this purpose, the invention relates to a pivot axis for a watch movement comprising at least one pivot in a first non-magnetic metal material at at least one of its ends to limit its sensitivity to magnetic fields, at least the outer surface of said pivot being covered with a first layer of a second material selected from the group consisting of Ni, NiB, and NiP.
    According to the invention, at least said first layer of the second material is at least partially covered with a second layer of a third material selected from the group consisting of gold, silver, copper, platinum, rhodium, palladium and their alloys.
    Therefore, the pivot axis according to the invention allows to combine the advantages of low sensitivity to magnetic fields, and at least in the main stress zones, excellent resistance to shocks. Therefore, the pivot axis according to the invention does not present, in case of impact, no mark or severe damage likely to affect the chronometry of the movement.
    In addition, the axes according to the invention have a better mechanical strength, improved tribological properties, but also a better chemical resistance vis-à-vis the lubricants traditionally used for the lubrication of the axes.
    According to other advantageous features of the invention: the first layer of the second material has a thickness of between 0.5 μm and 10 μm, preferably between 1 μm and 5% error: character: # not foundm, and more preferably between 1 pm and 2 pm; the first layer of the second material has a hardness of preferably greater than 400 HV, more preferably greater than 500 HV; the first layer of the second material is preferably a layer of chemical NiP, that is to say obtained by chemical deposition; the second layer of the third material has a thickness of between 0.1 μm and 1 μm, preferably between 0.1 μm and 0.5 μm; the second layer of the third material is preferably a gold-based layer deposited by galvanic means.
    In addition, the invention relates to a watch movement comprising a pivot axis as defined above, and in particular a balance shaft, an anchor rod and / or an exhaust pinion. comprising an axis as defined above.
    Finally, the invention relates to a method of manufacturing a pivot axis as defined above comprising the following steps: a) forming a pivot axis comprising at least one pivot in a first non-magnetic metallic material at least one of its ends to limit its sensitivity to magnetic fields; b) depositing a first layer of a second material at least on the outer surface of said pivot, said second material being selected from the group consisting of Ni, NiB and NiP, and c) depositing at least partially on the first layer of the second material a second layer of a third material selected from the group consisting of gold, silver, copper, platinum, rhodium, palladium and their alloys.
    According to other advantageous features of the invention: the first layer of the second material is deposited according to step b) to have a thickness of between 0.5 μm and 10 μm, preferably between 1 μm and 5 μm; and more preferably between 1 pm and 2 pm; the second material is NiP and step b) consists of a NiP deposition according to a chemical nickel deposition process from hypophosphite; the second layer of the third material is deposited according to step c) to have a thickness of between 0.1 μm and 1 μm, preferably between 0.1 μm and 0.5 μm; the third material is gold and step c) consists of a galvanic deposit of gold.
    BRIEF DESCRIPTION OF THE DRAWINGS [0018] Other features and advantages will become clear from the following description, given by way of indication and in no way limitative, with reference to the accompanying drawings, in which: FIG. 1 is a representation of a pivot axis according to the invention; and FIG. 2 is a partial section of a pendulum shaft pivot according to the invention.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0019] In the present description, the term "non-magnetic" material means a paramagnetic or diamagnetic or antiferromagnetic material whose magnetic permeability is less than or equal to 1.01.
    An alloy of an element is an alloy containing at least 50% by weight of said element.
    The invention relates to a piece for a watch movement and in particular to a non-magnetic pivoting axis for a mechanical clockwork movement.
    The invention will be described below in the context of an application to a non-magnetic balance shaft 1. Of course, other types of clockwise pivot axes are possible, such as for example the axes of watchmakers, typically exhaust gears, or anchor rods. The parts of this type have at the body diameters preferably less than 2 mm, and pivots of smaller diameter preferably 0.2 mm, with an accuracy of a few microns.
    Referring to FIG. 1 can be seen a balance shaft 1 according to the invention which comprises a plurality of sections 2 of different diameters, preferably formed by bar turning or any other machining process by chip removal, and classically defining spans 2a and shoulders 2b arranged between two end portions defining two pivots 3. These pivots are intended to each rotate in a bearing, typically in a hole of a stone or ruby.
    With the magnetism induced by the objects encountered in everyday life, it is important to limit the sensitivity of the balance shaft 1 under penalty of influencing the operation of the timepiece in which it is incorporated.
    Thus, the pivot 3 is made of a first nonmagnetic metallic material 4 in order to advantageously limit its sensitivity to magnetic fields.
    Preferably, the first nonmagnetic metallic material 4 is chosen from the group comprising a steel of the austenitic type, preferably stainless, a cobalt alloy of the austenitic type, a nickel alloy of the austenitic type, a titanium alloy. non-magnetic alloy, a brass (Cu-Zn) or a special brass (Cu-Zn with Al and / or Si and / or Mn), a copper-beryllium, a bronze (Cu-Sn), a aluminum bronze, a copper-aluminum (optionally including Ni and / or Fe), a drunk-nickel, a nickel silver (Cu-Ni-Zn), a copper-nickel-tin, a copper-nickel-silicon, a copper-nickel-phosphorus, a copper-titanium, the proportions of the various elements of the alloys being chosen to give them non-magnetic properties and good machinability.
    For example, the austenitic steel is a stainless steel austenitic HIS (High Interstitial Steels) steel, such as Cr-Mn-N P2000 steel from Energietechnik Essen GmbH.
    The cobalt alloy of the austenitic type may comprise at least 39% of cobalt, typically an alloy known as "Phynox" or the designation DIN K13C20N16Fe15D7 typically having 39% Co, 19% Cr, 15% of Ni and 6% Mo, 1.5% Mn, 18% Fe and additive balances.
    The austenitic nickel alloy may comprise at least 33% nickel, typically an alloy known as MP35N®, typically having 35% Ni 20% Cr, 10% Mo, 33% Co and the like. balance of additives.
    The titanium alloy preferably comprises at least 85% titanium.
    The brasses may comprise CuZn39Pb3, CuZn37Pb2 or CuZn37 alloys.
    The special brasses may comprise CuZn37Mn3Al2PbSi, CuZn23Al3Co or CuZn23Al6Mn4Fe3Pb alloys.
    Nickel silver can include CuNi25Zn11Pb1Mn, CuNi7Zn39Pb3Mn2 or CuNi18Zn19Pb1 alloys.
    The bronzes may include CuSn9 or CuSn6 alloys.
    Aluminum bronzes may include CuAl9 or CuAl9Fe5Ni5 alloys.
    The copper-nickel alloys may comprise the CuNi30 alloy.
    The copper-nickel-tin alloys may comprise the alloys CuNM5Sn8, CuNi9Sn6 or CuNi7.5Sn5 (sold for example under the name Declafor).
    The copper-titanium alloys may comprise the CuTi3Fe alloy.
    The copper-nickel-silicon alloys may comprise the CuNi3Si alloy.
    The copper-nickel-phosphorus alloys may comprise the CuNMP alloy.
    The copper-beryllium alloys may comprise CuBe2Pb or CuBe2 alloys.
    The composition values are given as a percentage by weight. The elements without indication of composition value are either the remainder (majority) or elements for which the percentage in the composition is less than 1% by weight.
    The nonmagnetic copper alloy may also be an alloy having a mass composition of between 14.5% and 15.5% of Ni, between 7.5% and 8.5% of Sn, at most 0.02% of Pb and the remainder of Cu. Such an alloy is marketed under the trademark Toughmet® by the company Materion.
    Of course, other nonmagnetic alloys are possible since the proportion of their constituents gives them non-magnetic properties and good machinability.
    The first non-magnetic metal material generally has a hardness of less than 600 HV.
    As shown in FIG. 2, at least the outer surface of said pivot 3 is covered with a first layer 5 of a second material selected from the group comprising Ni, NiB and NiP, in order to advantageously provide, in particular, mechanical properties at said surface external to obtain the required shock resistance.
    In the second material, the phosphorus content may be preferably between 0% (then pure Ni) and 15%. Preferably, the level of phosphorus in the second NiP material may be an average level of between 6% and 9%, or a high level of between 9% and 12%. It is obvious, however, that the second NiP material may comprise a low level of phosphorus.
    In the second material, the boron content may be preferably between 0% (then pure Ni) and 8%. Preferably, the level of boron in the second NiB material may be an average level of between 4% and 5%.
    In addition, a heat treatment may be performed between steps b) and c) and / or after step c). For example, when the second material is NiB, or NiP at medium or high phosphorus level, the first layer of the second NiB or NiP material can be advantageously cured by heat treatment.
    The first layer of the second material has a hardness of preferably greater than 400 HV, more preferably greater than 500 HV.
    In a particularly advantageous manner, the first layer of the second uncured Ni or NiP material has a hardness of preferably greater than 500 HV, but less than 600 HV, that is to say preferably between 500 HV and 550 HV. Surprisingly and unexpectedly, the pivot axis according to the invention has excellent impact resistance although the layer of the second material may have a lower hardness (HV) than that of the first material.
    When cured by heat treatment, the first layer of the second NiP material may have a hardness of between 900 HV and 1000 HV.
    The first layer of the second uncured NiB material has a hardness of preferably greater than 500 HV, and may have a hardness greater than 1000 HV when cured by heat treatment.
    Advantageously, the first layer of the second material may have a thickness of between 0.5 μm and 10 μm, preferably between 1 μm and 5 μm, and more preferably between 1 μm and 2 μm.
    Preferably, the first layer of the second material is a NiP layer, and more particularly a chemical NiP layer, that is to say deposited chemically.
    In another alternative embodiment, the first layer of the second material is a NiB layer, and more particularly a chemical NiB layer, that is to say deposited chemically.
    According to the invention, at least the first layer 5 of the second material is at least partially covered with a second layer 6 of a third material selected from the group consisting of gold, silver, copper, copper, platinum, rhodium, palladium, used in pure form or as an alloy. Said second layer 6 is of a thickness less than that of the first layer 5. Advantageously, the second layer 6 of the third material may have a thickness of between 0.1 μm and 1 μm, preferably between 0.1 μm and 0.5 μm. .
    Preferably, the third material is 24 carat gold, with some possible traces of other elements. For example, gold is used at 99.7-99.8% and 0.02-0.03% Ni or Co.
    Particularly preferred combinations include: - a copper-beryllium alloy, and more particularly CuBe2Pb, as the first non-magnetic metal material, covered with a chemical NiP layer as the first layer 5 of the second material, itself covered with a layer of gold as a second layer 6 of the third material - a copper-nickel-tin alloy, and more particularly Declafor or Toughmet®, as the first non-magnetic metallic material, covered with a layer of NiP chemical as the first layer 5 of the second material, itself covered with a layer of gold as a second layer 6 of the third material - a stainless steel, and more particularly, a stainless steel HIS, as the first non-magnetic metallic material, covered with a layer of NiP chemical as first layer 5 of the second material, itself covered with a gold layer as a second layer 6 of the third material.
    Therefore, at least the outer surface of the pivot is hardened, that is to say that the rest of the axis, can remain little or no change without significant modification of the mechanical properties of the balance shaft 1. This selective hardening of the pivots 3 of the balance shaft 1 makes it possible to cumulate the advantages such as the low sensitivity to the magnetic fields and the mechanical properties making it possible to obtain a very good resistance to shocks, in the main stress zones. In addition, the second layer of the third material, of lesser thickness, constitutes the outer layer of the pivot of the invention, and forms a protective layer. More particularly, the second layer of the third material makes it possible to render the surface of the pivot of the invention chemically inert and to limit the degradation of the first layer of the second material by the action of friction with the stones and / or by chemical reaction with the lubricant used.
    In order to improve the strength of the first layer of the second material, the pivot axis may comprise at least one adhesion sub-layer deposited between the first material and the first layer of the second material. For example, in the case in particular of a pivot axis made of HIS stainless steel type material, a gold underlayer and / or a galvanic nickel underlayer may be provided under the first layer of the second material.
    The invention also relates to the method of manufacturing a balance shaft as explained above. The method advantageously comprises, according to the invention, the following steps: a) forming, preferably by free-cutting or any other machining removal technique, a balance shaft 1 comprising at least one pivot 3 made of a first non-magnetic metallic material to each of its ends, to limit its sensitivity to magnetic fields; b) depositing a first layer 5 of a second material at least on the outer surface of said pivot 3, said second material being selected from the group comprising Ni, NiB and NiP in order to improve the mechanical properties of the pivots to obtain a resistance to appropriate shocks at least at the level of the main stress zones; and c) depositing at least partially on the first layer 5 of the second material a second layer 6 of a third material selected from the group consisting of gold, silver, copper, platinum, rhodium, palladium and their alloys.
    In a preferred manner, the first layer 5 of the second material is deposited according to step b) to have a thickness of between 0.5 .mu.m and 10 .mu.m, preferably between 1 .mu.m and 5 .mu.m, and more preferably between 1 .mu.m and 5 .mu.m. pm and 2 pm.
    Advantageously, the step b) of depositing the first layer 5 of the second material may be carried out according to a method chosen from the group comprising PVD, CVD, ALD, galvanic and chemical, and preferably chemical, deposits.
    According to a particularly preferred embodiment, the second material is NiP and the deposition step of the NiP layer 5 is carried out according to a chemical nickel deposition process from hypophosphite.
    The various chemical nickel deposition parameters from hypophosphite to be taken into account, such as the phosphorus content in the deposition, the pH, the temperature, or the composition of the nickel plating bath are known to man. of career. For example, reference may be made to the publication of Y. Ben Amor et al., Nickel Chemical Depot, Bibliographic Synthesis, Materials & Techniques 102, 101 (2014). However, it will be specified that commercial baths are used at average rates (6-9%) and at high rates (9-12%) of phosphorus. It is obvious, however, that low-phosphorus or pure nickel baths can also be used.
    According to another embodiment, the second material is NiB and the deposition step of the NiB layer 5 is carried out according to a chemical nickel deposition process from boron compounds.
    In a preferred manner, the second layer 6 of the third material is deposited on the first layer 5 to have a thickness of between 0.1 .mu.m and 1 .mu.m, preferably between 0.1 .mu.m and 0.5 .mu.m.
    Advantageously, the step c) of depositing the second layer 6 of the third material is carried out according to a method selected from the group consisting of PVD (sputtering, evaporation or other), CVD, and galvanic deposits. According to a particularly preferred embodiment, the third material is gold and the deposition step of the gold layer 6 is carried out galvanically. These methods are known to those skilled in the art and do not require detailed description.
    When the second material is NiB or NiP, preferably at medium or high level of phosphorus, the method according to the invention may further comprise, between steps b) and c) and / or after the step deposition c), a step d) heat treatment. Such a heat treatment makes it possible to obtain a first layer 5 of the second material having a hardness of preferably between 900 HV and 1000 HV. Preferably, step d) of heat treatment is performed after step c). A heat treatment step of the first material may also be provided before step a) or step b).
    The chemical nickel deposition process is particularly advantageous in that it provides a compliant deposit and not having a peak effect. It is thus possible to provide the dimension of the pivot axis of the neck to obtain the desired geometry after recovery by the layer of the second material.
    The chemical nickel deposition process also has the advantage of being applied in bulk.
    In order to improve the resistance of the first layer of the second material, the method according to the invention may further comprise, before the deposition step b), a step e) of application of at least one sub adhesion layer on the first material. For example, in the case in particular of a pivot axis of HIS stainless steel type material, it is possible to apply a gold underlayer and / or a galvanic nickel underlayer before nickel deposition by chemical way.
    The pivot axis according to the invention may comprise treated pins according to the invention by applying the steps b) and c) only pivots, the second layer 6 of the third material partially or completely coating the pivot by applying the step c) on part or all of the surface of the pivot.
    The pivot axis according to the invention can also be made entirely of a first nonmagnetic metallic material, its outer surface can be completely covered with a first layer of the second material by applying step b) on all the surfaces of the pivot axis, then said first layer of the second material being then partially or completely covered with a second layer of a third material selected from the
    权利要求:
    Claims (19)
    [1]
    group comprising gold, silver, copper, platinum, rhodium, palladium and their alloys, by applying step c) on part or all of the surfaces of the pivot axis. In a known manner, the pivots 3 can be rolled or polished before or after the deposition step b), in order to reach the final dimensions and the final surface state desired for the pivots 3. [0077] The pivot axis according to the invention combines the advantages of a low sensitivity to magnetic fields, and at least in the main stress zones, excellent resistance to shocks. Therefore, the pivot axis according to the invention does not present, in case of impact, no mark or severe damage likely to affect the chronometry of the movement. In addition, the axes according to the invention have a better mechanical strength, better tri-bological properties, but also a better chemical resistance vis-à-vis the lubricants traditionally used for the lubrication of the axes. claims
    Pivoting axis (1) for a watch movement comprising at least one pivot (3) of a first non-magnetic metal material (4) at at least one end thereof in order to limit its sensitivity to magnetic fields, at least the external surface of said pivot (3) being covered with a first layer (5) of a second material selected from the group comprising Ni, NiB and NiP, and preferably NiP chemical, characterized in that at least the first layer (5) of second material is at least partially covered with a second layer (6) of a third material selected from the group consisting of gold, silver, copper, platinum, rhodium, palladium and their alloys.
    [2]
    2. Pivot axis (1) according to claim 1, characterized in that it is made of a first non-magnetic metal material to limit its sensitivity to magnetic fields, in that its outer surface is covered with a first layer of a second material selected from the group consisting of Ni, NiB and NiP, and preferably NiP chemical, and in that the first layer of the second material is at least partially covered by a second layer of a third material selected from the group including gold, silver, copper, platinum, rhodium, palladium and their alloys.
    [3]
    3. Pivot axis (1) according to one of the preceding claims, characterized in that the first material (4) nonmagnetic metal is selected from the group comprising austenitic type steel, a cobalt alloy of the austenitic type, an alloy of austenitic type nickel, a titanium alloy, an aluminum alloy, a copper-zinc brass, a beryllium copper, a nickel silver, a bronze, an aluminum bronze, a copper-aluminum, copper-nickel, copper-nickel-tin, copper-nickel-silicon, copper-nickel-phosphorus, copper-titanium.
    [4]
    4. Pivot axis (1) according to one of the preceding claims, characterized in that the first material (4) nonmagnetic metal has a hardness of less than 600 HV.
    [5]
    Pivoting axis (1) according to one of the preceding claims, characterized in that the first layer (5) of the second material has a thickness of between 0.5 μm and 10 μm, preferably between 1 μm and 5 μm, and more preferably between 1 pm and 2 pm.
    [6]
    6. Pivot axis (1) according to one of the preceding claims, characterized in that said first layer (5) of the second material has a hardness greater than 400 HV, preferably greater than 500 HV.
    [7]
    7. Pivot axis (1) according to one of the preceding claims, characterized in that the second layer (6) of the third material has a thickness between 0.1 pm and 1 pm, preferably between 0.1 pm and 0.5 pm.
    [8]
    8. Pivot axis (1) according to one of the preceding claims, characterized in that the first non-magnetic metal material (4) is a copper-beryllium alloy, in that said first layer (5) of the second material is a layer NiP chemical, and in that said second layer (6) of the third material is a layer of gold.
    [9]
    9. Pivot axis (1) according to one of claims 1 to 7, characterized in that the first non-magnetic metal material (4) is a copper-nickel-tin alloy, in that said first layer (5) of the second material is a layer of chemical NiP, and in that said second layer (6) of the third material is a layer of gold.
    [10]
    10. Pivot axis (1) according to one of claims 1 to 7, characterized in that the first material (4) nonmagnetic metal is a stainless steel, in that said first layer (5) of the second material is a layer NiP chemical, and in that said second layer (6) of the third material is a layer of gold.
    [11]
    11. Movement for timepiece, characterized in that it comprises a pivot axis (1) according to one of the preceding claims.
    [12]
    12. Movement for a timepiece characterized in that it comprises a rocker shaft (1), an anchor rod and / or an exhaust pinion comprising an axis according to one of claims 1 to 10.
    [13]
    13. A method of manufacturing a pivot axis (1) for a watch movement comprising the following steps: a) forming a pivot axis (1) comprising at least one pivot (3) of a first non-magnetic metal material (4) to at least one of its ends to limit its sensitivity to magnetic fields; b) depositing a first layer (5) of a second material at least on the outer surface of said pivot (3), said second material being selected from the group comprising Ni, NiB and NiP, and c) depositing at least partially on the first layer (5) of the second material a second layer (6) of a third material selected from the group consisting of gold, silver, copper, platinum, rhodium, palladium and their alloys.
    [14]
    14. The method of claim 13, characterized in that the first layer (5) of the second material is deposited to have a thickness between 0.5 pm and 10 pm, preferably between 1 pm and 5 pm, and more preferably between 1 pm and 2 pm.
    [15]
    15. Method according to one of claims 13 and 14, characterized in that the step b) of depositing the first layer (5) of the second material is carried out according to a method selected from the group consisting of PVD, CVD, ALD, galvanic and chemical.
    [16]
    16. The method as claimed in claim 15, characterized in that the second material is NiP and in that the step of depositing the NiP layer (5) is carried out according to a method of deposition of chemical nickel from hypophosphite .
    [17]
    17. Method according to one of claims 13 to 16, characterized in that the second layer (6) of the third material is deposited to have a thickness between 0.1 pm and 1 pm, preferably between 0.1 pm and 0.5 pm.
    [18]
    18. Method according to one of claims 13 to 17, characterized in that the step c) of depositing the second layer (6) of the third material is carried out according to a method selected from the group consisting of PVD deposits, CVD, and galvanic.
    [19]
    19. Method according to one of claims 13 to 18, characterized in that the second material is NiP or NiB and in that said method further comprises, between steps b) and c) and / or after step c), a step d) of heat treatment.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP3594756A1|2018-07-10|2020-01-15|Blancpain SA|Timepiece component with arboured portion made of non-magnetic alloy|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00928/16A|CH712719B1|2016-07-19|2016-07-19|Watch component for watch movement.|
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