• 专利附录
  • 专利说明
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    • 专利摘要:
    A precious precious alloy based on titanium and gold, comprising at least 750 ‰ by weight of gold, characterized in that said alloy has a composition of formula: Ti a Au b M c T where a, b, c, d are atomic proportions and such that: a + b + c + d = 1, 0.45 ≤0.55; 0.41≤b≤0.495; 0.025≤c≤0.13; 0.001≤d≤0.025, where M represents one or more elements taken from a first group comprising (Nb, V, Pd, Pt, Fe), where T represents a maximum of two elements taken from a second group comprising Nb, V, Pd , Pt, Fe, Mo, Ta, W, Co, Ni, Ru, Rh, Ir, Cr, Mn, Cu, Zn, Ag, Al, B, Si, Ge, Sn, Sb, In, with the exception of said M metals that includes said alloy. Watchmaking or jewelery or jewelery component made of such a precious precious alloy made of titanium and gold.
    公开号:CH710575A2
    申请号:CH01850/15
    申请日:2015-12-17
    公开日:2016-06-30
    发明作者:Villard Gaëtan；Vincent Denis；Lauper Stéphane
    申请人:Montres Breguet Sa；
    IPC主号:
    专利说明:

    Field of the invention
    The invention relates to a precious precious alloy based on titanium and gold, comprising at least 750 ‰ in mass of gold.
    The invention also relates to a watch or jewelry component made of such a precious precious alloy based on titanium and gold.
    The invention relates to the field of structural components or dressing clockwork or jewelry or jewelry in 18-carat gold alloy.
    Background of the invention
    [0004] A characteristic common to most precious alloys used in watchmaking is their high density, greater than 10 g / cm <3>. Indeed, the two main precious metals used in watchmaking, gold and platinum, have respective densities of about 19.3 and 21.5 g / cm <3>. This has the consequence of making their alloys relatively heavy.
    [0005] Titratable gold alloys are usually very dense because of their high gold content, and because they seldom incorporate light elements in large quantities. It is also usual to lead to fragile compounds if we combine gold with light elements in large quantities.
    The Ti-Au system has nevertheless been studied in the area of the TiAu equi-atomic intermetallic.
    These alloys, in their binary or ternary form, are known to have a shape memory effect, especially the alloys having the Ti50Au50 and Ti50Ni10Au40 atomic compositions.
    [0008] With regard to this shape memory effect, it has also been found that the temperature Ms is decreased following the addition of ternary elements to the Ti50Au50 alloy.
    TiAuFe alloys with 5, 10, 14, 15 and 20 atomic% of iron, and TiAuCo and TiAuCoNb alloys, were the subject of special studies, without exploitable results for the problem.
    If the biocompatibility of these alloys is often put forward for medical applications, no composition for both the title of 18 carats without overload and acceptable mechanical properties for the manufacture of watchmaking parts is proposed .
    EP 2 548 982 A1 discloses alloys containing from 50% to 99% titanium, and more specifically alloys containing a single precious element in addition to titanium, ideally located between 5 and 15% of precious metal. Note that an alloy of titanium and gold containing 5 to 15% gold is not titratable at 18 carats, because the required mass proportion of 75% of the total gold is not reached.
    US 4,568,398 discloses Ti-Au type alloys containing between 95% and 40% by weight of titanium, but the rest of the composition, including the small proportion of gold, also prevents their titration at 18 carats.
    WO 2008/018109 A1 discloses titanium alloys and titratable gold between 6 and 18 carats, shape memory, which is not desired, or super-elastic, and having a certain elongation at the breakup. Most of these alloys are compositions containing nickel, which is undesirable for the production of external clockwork components or jewelry or jewelry, likely to come into contact with human skin. This document discloses only two compositions with 18 carats: Ti11.23Ni13.77Au75and Ti12.5Ni12.5Au75en mass. These two compositions are strongly separated from an atomic content of 50% of titanium and contain nickel, they are not suitable for use of clockwork.
    Summary of the invention
    The invention proposes to develop a titrable alloy with 18 carats of gold, which is easy to shape to allow the realization of watchmaking components or jewelery or jewelry, such as watch cases , bracelets, jewelry or the like, and also lighter than a traditional gold alloy while having very good mechanical properties, as can titanium alloys.
    For this purpose, the invention relates to a precious alloy based on titanium and gold, comprising at least 750 ‰ by weight of gold, according to claim 1.
    The invention also relates to a timepiece or jewelry component made of such a precious alloy based on titanium and gold.
    In summary, the present invention consists of a ductile alloy based on the TiAu equi-atomic intermetallic in which the excess gold relative to the 18 K mass content is replaced by another non-precious element so that titanium still represents 50 to 51 atomic% of the final alloy and gold 750 ‰ by mass (18 carats). Such an alloy has sufficient ductility to provide a formability similar to that of conventional titanium alloys.
    Detailed Description of the Preferred Embodiments
    All concentrations expressed in the present description are atomic proportions, unless specified otherwise, particularly with respect to gold.
    The invention relates to a predominantly titanium-gold alloy, of formulation:TiaAubMcTdwhere a, b, c, d are atomic proportions and such that:a + b + c + d = 1,0.45≤a≤0.55;0.41≤b≤0.495;0.025≤c≤0.13;0.001≤d≤0.025,where M represents one or more elements taken from a first group including Nb, V, Pd, Pt, Fe,where the mass titre in gold is greater than or equal to 750 ‰,and where T represents a maximum of two elements taken from a second group comprising Nb, V, Pd, Pt, Fe, Mo, Ta, W, Co, Ni, Ru, Rh, Ir, Cr, Mn, Cu, Zn, Ag , Al, B, Si, Ge, Sn, Sb, In, with the exception of the metals M that this alloy contains.The parameter "a" defines the fraction of titanium.The parameter "b" defines the golden fraction.The parameter "c" defines the total fraction of the elements M.The parameter "d" defines the total fraction of the elements T.
    The alloy has 750 ‰ in mass of gold. This mass proportion of the total of the alloy does not naturally come into contradiction with the atomic proportions of the alloying elements, it is an additional condition related to the title, and which is in no way incompatible with the compositions of the alloys. alloy described in the present invention.
    More particularly, for applications relating to the components likely to be in contact with the skin of a user, nickel is excluded from the alloy, and the formulation is restricted with respect to T, which represents a maximum two elements taken from a third group corresponding to the second group from which the nickel is removed, and comprising: Nb, V, Mo, Ta, W, Fe, Co, Ru, Rh, Ir, Pd, Pt, Cr, Mn, Cu , Zn, Ag, Al, B, Si, Ge, Sn, Sb, In, with the exception of the metals M that this alloy contains.
    The same alternative relates to the whole of the present description for each alloy capable of a similar application.
    More particularly, the formulation is restricted to titanium fraction "a", gold "b" and element M "c" in the form:TiaAubMcTdwith 0.48≤a≤0.52; 0.42≤b≤0.48; 0.025≤c≤0.10; 0.001≤d≤0.025.
    More particularly, the formulation is restricted to titanium fraction "a" and element M "c" in the form:TiaAubMcTdwith 0.49≤a≤0.51; 0.42≤b≤0.48; 0.025≤c≤0.09; 0.001≤d≤0.025.
    More particularly, the formulation is restricted to titanium fraction "a", gold "b" and element M "c" in the form:TiaAubMcTdwith 0.50≤a≤0.51; 0.42≤b≤0.47; 0.025≤c≤0.08; 0.001≤d≤0.025.
    The range 0.50-0.51 for the atomic fraction of titanium corresponds to the stability interval of the TiAu equiatomic intermetallic phase at room temperature in the Ti-Au binary system.
    More particularly, T represents a maximum of two elements taken from a fourth group which is smaller than the third group and comprising: Nb, V, Fe, Ru, Rh, Ir, Pd, Pt, Cr, Cu, Ag, B, with the exception of the metals M that includes this alloy.
    More particularly, M represents one or more elements belonging to a fifth group corresponding to the first group from which the vanadium is removed and comprising: Nb, Pd, Pt, Fe.
    More particularly, for the purpose of using boron as a grain refiner, T represents, on the one hand, boron at a content of between 0.03% and 0.3%, and on the other hand, at least in the case where the minimum value "d" of 0.1% is not reached, a single element from a sixth group comprising: Nb, V, Fe, Ru, Rh, Ir, Pd, Pt, Cr, Cu, Ag, in sufficient quantity so that the value "d", which is the sum of the atomic fraction of boron and that of said element from said sixth group, is between 0.001 and 0.025.
    The following compositions form particularly promising alloys, combining ease of implementation, reduced density, beautiful appearance and reduced gold surtitrage, which is essential for watchmaking and jewelery applications.
    Their formulation is of typeTiaAubMcTdwith 0.50≤a≤0.51; 0.42≤b≤0.47; 0.025≤c≤0.08; 0.001≤d≤0.025,where M represents only one element from the fifth group comprising Nb, Pd, Pt, Fe,and where T represents boron at a content of between 0.03% and 0.3% and, at least in the case where the minimum atomic value "d" of 0.1% is not reached, a single element from the sixth group comprising; Nb, V, Fe, Ru, Rh, Ir, Pd, Pt, Cr, Cu, Ag, in sufficient quantity for the value "d", which is the sum of the atomic fraction of boron and that of said element from sixth group, is between 0.001 and 0.025.More particularly, M is iron.More particularly, M is niobium.More particularly, M is platinum.More particularly, M is palladium.
    More particularly, the mass content of gold of the alloy is less than 780 ‰.
    More particularly, the mass content of gold of the alloy is less than 760 ‰.
    Examples of atomic compositions for which a = 0.50 and d = 0.001 are given below:<Tb> Ti0.50Au0.427Fe0.072B0.001a = 0.50; b = 0.427; c = 0.072; d = 0.001 <SEP> Title At mass: 750.5 ‰<Tb> Ti0.50Au0.444Nb0.055B0.001a = 0.50; b = 0.444; c = 0.055; d = 0.001 <SEP> Title to the mass: 750.6 ‰<Tb> Ti0.50Au0.466Pt0.033B0.001a = 0.50; b = 0.466; c = 0.033; d = 0.001 <SEP> Title to the mass: 751.3 ‰<Tb> Ti0.50Au0.448Pd0.051B0.001a = 0.50; b = 0.448; c = 0.051; d = 0.001. <SEP> Title At mass: 750.3 ‰
    Here there are other examples of atomic compositions for which a = 0.505, and d represents two elements:<Tb> Ti0.505Au0.4295Fe0.050Cr0.015B0.0005a = 0.505; b = 0.4295; c = 0.05; d = 0.0155 <SEP> Title to the mass: 753 ‰<Tb> Ti0.505Au0.4385Nb0.041Cr0.015B0.0005a = 0.505; b = 0.4385; c = 0.041; d = 0.0155 <SEP> Title At mass: 750.2 ‰<Tb> Ti0.505Au0.448Pd0.041Rh0.0365B0.0105a = 0.505; b = 0.448; c = 0.0365; d = 0.0105 <SEP> Title At the mass: 752.1 ‰<Tb> Ti0.505Au0.463Pt0.031Ir0.0005B0.0005a = 0.505; b = 0.463; c = 0.031; d = 0.001 <SEP> Title At mass: 750.5 ‰
    In one variant of the invention, it is also possible to substitute a portion of the titanium for a few% of Zr or Hf, in particular between 0 and 3%. The formulation of this alloy is then:NaAubMcTdwhere a, b, c, d are atomic proportions and such that:a + b + c + d = 1,0.45≤a≤0.55;0.41≤b≤0.495;0.025≤c≤0.13;0.001≤d≤0.025,where N is a composition of titanium, zirconium, hafnium, the atomic rate of zirconium being between 0% and 3% of the total of the alloy, the atomic rate of hafnium being between 0% and 3% of the total of the alloy, where M represents one or more elements taken from a first group comprising Nb, V, Pd, Pt, Fe,where the mass titre in gold is greater than or equal to 750 ‰,and where T represents a maximum of two elements taken from a second group comprising Nb, V, Pd, Pt, Fe, Mo, Ta, W, Co, Ni, Ru, Rh, Ir, Cr, Mn, Cu, Zn, Ag , Al, B, Si, Ge, Sn, Sb, In, with the exception of the metals M that this alloy contains.
    The invention also relates to a component or timepiece or jewelery or jewelry made in such a precious alloy light titanium and gold base.
    The invention has many advantages derived from the features mentioned above:these alloys have moderate hardness less than or equal to 300 HV, and thus allow shaping by the usual methods of deformation;they are titular at 18 carats;they are particularly light in comparison with the majority of 18-carat titratable alloys;alloys in nickel-free variants are not dangerous for the human body;
    The production of watchmaking components in one of the alloys mentioned above can benefit from the optimization of the composition of the alloy according to different angles:adding elements lowering the melting point to facilitate implementation;modification of the content of substitute element of the precious metal, in order to modify the mechanical properties of the alloy;various light modifications to obtain alloys with structural hardening.
    权利要求:
    Claims (16)
    [1]
    1. A precious precious alloy based on titanium and gold, comprising at least 750% by weight of gold, characterized in that said alloy has a composition of formula:TiaAubMcTdwhere a, b, c, d are atomic proportions and such that:a + b + c + d = 1,0.45≤a≤0.55; 0.41≤b≤0.495; 0.025≤c≤0.13; 0.001≤d≤0.025,where M represents one or more elements taken from a first group including (Nb, V, Pd, Pt, Fe),where T represents a maximum of two elements taken from a second group comprising Nb, V, Pd, Pt, Fe, Mo, Ta, W, Co, Ni, Ru, Rh, Ir, Cr, Mn, Cu, Zn, Ag, Al, B, Si, Ge, Sn, Sb, In, with the exception of said metals M which comprises said alloy.
    [2]
    2. Alloy according to claim 1, characterized in that T represents a maximum of two elements taken from a third group comprising Nb, V, Pd, Pt, Fe, Mo, Ta, W, Ru, Rh, Ir, Cr, Mn. , Cu, Zn, Ag, Al, B, Si, Ge, Sn, In, with the exception of said metals M included in said alloy.
    [3]
    3. Alloy according to claim 1 or 2, characterized in that 0.48≤a≤0.52; 0.42≤b≤0.48; 0.025≤c≤0.10; 0.001 ≤d≤0.025.
    [4]
    4. An alloy according to claim 3, characterized in that 0.49 a a 0 0.51; 0.42≤b≤0.48; 0.025≤c≤0.09; 0.001≤d≤0.025.
    [5]
    5. An alloy according to claim 4, characterized in that 0.50 a ≤ .5 0.51; 0.42≤b≤0.47; 0.025≤c≤0.08; 0.001≤d≤0.025.
    [6]
    6. An alloy according to claim 5, characterized in that T represents a maximum of two elements taken from a fourth group comprising Nb, V, Pd, Pt, Fe, Ru, Rh, Ir, Cr, B, with the exception of M metals that includes said alloy.
    [7]
    7. An alloy according to claim 6, characterized in that M represents one or more elements taken from a fifth group comprising Nb, Pd, Pt, Fe.
    [8]
    8. An alloy according to claim 7, characterized in that T comprises boron at an atomic content of between 0.03% and 0.3%.
    [9]
    9. An alloy according to claim 8, characterized in that, when the atomic proportion of boron is less than 0.10%, T comprises, in addition to boron, a single other element taken from a sixth group comprising Nb, V, Pd, Pt. , Fe, Ru, Rh, Ir, Cr, with the exception of said metals M that includes said alloy.
    [10]
    10. Alloy according to claim 8 or 9, characterized in that M is iron.
    [11]
    11. An alloy according to claim 8 or 9, characterized in that M is niobium.
    [12]
    12. Alloy according to claim 8 or 9, characterized in that M is platinum.
    [13]
    13. An alloy according to claim 8 or 9, characterized in that M is palladium.
    [14]
    14. Alloy according to one of the preceding claims, characterized in that the mass content of gold of said alloy is less than 780 ‰.
    [15]
    15. Alloy according to claim 14 characterized in that the mass content of gold of said alloy is less than 760 ‰.
    [16]
    16. Watchmaking or jewelery or precious alloy jewelery component made of titanium and gold according to one of the preceding claims.
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    同族专利:
    公开号 | 公开日
    CH710575B1|2019-08-30|
    CH710562A2|2016-06-30|
    CH710562B1|2019-09-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH02035/14A|CH710562B1|2014-12-29|2014-12-29|Watch component or jewelery component made of a precious alloy made of titanium and a timepiece or jewelery comprising such a component.|
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