• 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 present invention relates to a white 18K gold alloy for jewelry, and more particularly, to a white 18K gold alloy for jewelry that is excellent in color, castability and workability while excluding expensive palladium (Pd) and nickel (Ni). To this end, the present invention is 75% gold (Au), 5-10% silver (Ag), 5-10% copper (Cu), 5-10% manganese (Mn) and 1-6 zinc (Zn) It provides a white 18K gold alloy for jewelry, characterized in that it is made of% and white 18K gold alloy for jewelry, characterized in that indium (In) is added in the range of 2 to 6% by weight. In this way, manganese (Mn), silver (Ag), copper (Cu) and zinc (Zn) are alloyed as described above, and indium (In) is added to replace a part of the alloying element to form a white 18K gold alloy. By manufacturing a completely eliminated nickel (Ni) and expensive palladium (Pd) that causes allergic dermatitis to prevent allergic dermatitis, reduce the manufacturing cost and at the same time has excellent color, castability and processability.
    公开号:KR20030033344A
    申请号:KR1020010065081
    申请日:2001-10-22
    公开日:2003-05-01
    发明作者:장성락；정준교；이은우
    申请人:주식회사 리골드；
    IPC主号:
    专利说明:

    White 18K gold alloy for jewelry {18K WHITE GOLD ALLOYS FOR JEWELRY}
    [1] The present invention relates to a white gold alloy for jewelry, and more particularly, to a white 18K gold alloy for jewelry that is excellent in color, castability and workability while excluding expensive palladium (Pd) and nickel (Ni).
    [2] In general, the gold alloy ornaments are different in color, such as yellow gold, red gold, green gold and white gold, depending on the alloying elements. These alloying elements include silver (Ag), copper (Cu), zinc (Zn), nickel (Ni) and palladium (Pd), and are usually 14K or 18K gold alloys containing 25 to 45% by weight of alloying components. Mainly used as
    [3] The white noble metal used as the trinket is preferably a platinum alloy containing platinum (Pt) as a main component, but Pt has a high melting point and poor castability, and is expensive.
    [4] Therefore, a low price and easy processing gold alloy has been developed and its usage is increasing. Especially, since 18K gold alloy cannot obtain white color only with Ag, Cu and Zn, Ni or Pd is an alloying element. It can be added to provide a white gold of excellent color, this white gold alloy can be largely divided into Au-Ni-based, Au-Pd-based and Au-Ni-Pd-based.
    [5] In particular, Japanese Patent No. 63-169347 has developed Au-Ni-based gold alloys containing 5-20% of Ni. In order to compensate for the shortcomings of Au-Ni-based gold alloys that cause allergic dermatitis, Japanese Patent No. 3-130332 And # 3-130334, # 3-130335 and # 9-184033 have developed Au-Pd-based gold alloys containing 10 to 35% and 1 to 10% Pd and Ag, respectively.
    [6] In general, white gold alloy is plated with rhodium (Rh) to emphasize wear resistance and brightness of white. In the case of Au-Ni-based plating layer, when the plating layer is peeled off, allergy is caused by exposing Ni and causing skin rash. .
    [7] In addition, Au-Pd-based gold alloy is excellent in color and workability, but the melting point of Pd is poor, castability is poor, and due to the higher price than Au, there is a disadvantage that it is not easy to handle and introduce, and solves the above disadvantages to some extent. To this end, there is Au-Pd-Ni-based gold alloy containing both Pd and Ni, but when the Ni content is increased, the white color is improved, but the hardness is increased, the workability is lowered, and when the Rh plating layer is peeled off, Au-Ni Like the system has a problem that can cause allergic dermatitis.
    [8] In order to solve the above problems, the present invention excludes the addition of nickel (Ni) and expensive palladium (Pd), which causes allergic dermatitis, while having excellent castability and processability, and excellent color and do not cause allergic dermatitis. Its purpose is to provide a white gold alloy for jewelry.
    [9] In order to achieve the above object, the present invention provides 75% by weight of gold (Au), 5-10% of silver (Ag), 5-10% of copper (Cu), 5-10% of manganese (Mn) and zinc. (Zn) 1 to 6% of the white 18K gold alloy for ornaments, characterized in that the composition of the white 18K gold alloy for ornaments, silver (Ag), copper (Cu), manganese (Mn) and zinc ( A portion of Zn) is replaced with indium (In) to provide a white 18K gold alloy for jewelry, characterized in that the content of copper indium (In) in the range of 2 to 6% by weight.
    [10] Hereinafter, the reason for numerical limitation of the gold alloy composition according to the present invention will be described in detail.
    [11] (1) Silver (Ag): 5 to 10 wt%
    [12] In the white gold alloy according to the present invention, Ag is added for the whitening effect, and when added below the lower limit of 5% by weight, Ag loses the function of compensating for the whitening effect of manganese (Mn), and the upper limit of 10% by weight. If it is added in excess, the whitening effect is small according to the increase of the added amount, and the cost burden increases.
    [13] (2) Copper (Cu): 5 to 10% by weight
    [14] In the white gold alloy according to the present invention, Cu is an element added to improve workability, when the content exceeds 10% by weight, a red color is strongly present, and the whitening effect of manganese (Mn) is lost. When added in an amount less than% by weight, the workability is significantly lowered, thereby adding the same content.
    [15] (3) Zinc (Zn): 1 to 6 wt%
    [16] In the white gold alloy according to the present invention, Zn is added to improve the deoxidation function and fluidity of the molten metal, and when the content exceeds 6% by weight, there is a problem that the mechanical strength decreases and the tendency of hot brittleness increases. Less than the weight%, the effect of the above-mentioned deoxidation function and the flowability improvement of the molten metal is reduced, and the castability is weakened.
    [17] (4) Manganese (Mn): 5 to 10% by weight
    [18] In the white gold alloy according to the present invention, Mn is an element added for the whitening effect of the gold alloy, when the content exceeds 10% by weight of the slag in the molten metal due to the strong oxidizing property of Mn castability of the molten metal There is a problem of deterioration, and when the content is added less than 5% by weight, the whitening effect of the gold alloy hardly appears.
    [19] (5) Indium (In): 2-6 wt%
    [20] In the white gold alloy according to the present invention, In is added for the hardness of the casting and the whitening effect of the alloy, and when the content exceeds 6% by weight, there is a problem in that workability is lowered, thereby limiting the upper limit thereof. In added at is added to replace it within the limits of the addition amount of Ag, Cu, Mn and Zn described above.
    [21] Hereinafter, the present invention will be described in detail with reference to preferred embodiments.
    [22] EXAMPLE
    [23] In the present invention, 18K gold alloy composition as shown in Table 1 was subjected to melt casting in a vacuum, the process of the melt casting is selected by the casting source to make a tree (Tree) with a pattern (Pattern) injected into the wax (Wax) flask It was inserted into the flask, buried in plaster, and degassed in vacuo.
    [24] After the plaster-fired flask was charged into a vacuum casting machine, the alloy composition of the target composition was weighed, charged into a vacuum induction melting furnace, sufficiently dissolved, and vacuum cast at a constant temperature about 100 ° C. above the solidification temperature.
    [25] The castings were deposited in an aqueous solution of sulfuric acid to remove foreign substances such as oxides on the surface, and then the parts were cut and chromaticity analysis, component analysis, and casting hardness were measured. The hardness measurement conditions were 1000 g of load and 10 seconds of reduction time. Changes in the alloying composition after casting were quantitatively analyzed using an X-ray Fluorescence Spectrometer (XRF).
    [26] In addition, the chromaticity analysis was analyzed using a chromatic analyzer (HuntLab), where L represents the lightness (L), the larger the L value indicates the higher degree of brightness.
    [27] In chromaticity analysis, a is a factor representing color intensity, and the larger is closer to red, the smaller is closer to green, and b is closer to blue, and larger is closer to blue. It means close to yellow. In addition, C represents chroma The smaller the value of C, the closer to white.
    [28]
    [29] Table 2 is measured and shown the tendency of hardness and chromaticity, castability of the embodiment and the prior art according to the present invention.
    [30] As shown in Table 2, the conventional example 1 is relatively good castability, but the color is silver gray a lot, the high nickel content is high risk of allergic dermatitis, the conventional example 2 is the alloy composition of other companies, castability and color is Although it contains excellent Pd, it is not only a factor to increase the manufacturing cost but also a lot of difficulties in recovering expensive metals from waste scrap. The conventional example 3 is excellent in castability and color due to the alloy composition developed by other companies. It is relatively good but contains a large amount of expensive Ag, as in the case of the conventional example 2, it is an increase factor of the manufacturing cost.
    [31] Looking at the chromaticity, hardness, and castability of the inventive material in the embodiment according to the present invention, the higher the content of Mn is closer to white color, while Mn has a high oxidative property, so that slag is generated in the molten metal and castability is increased. There is a problem of deterioration.
    [32] Comparative materials 1 and 2 and Inventive materials 9 and 10 are gold alloys containing In, and as the amount of In is increased, the casting hardness increases and the whitening effect of Mn is increased, but workability is deteriorated.
    [33] Comparative material 3 is a gold alloy containing a small amount of chromium (Cr), but was close to white, but castability and workability were inferior. Comparative material 4 containing iron (Fe) was also found to be inferior in castability and processability.
    [34] In the inventive material of Example, although silver (Ag) was added in a large amount of about 10% by weight, as in Inventive Material 8, unlike in In, it was shown that the role of promoting the whitening effect of Mn was not very large. It can be seen that there is no need.
    [35] In addition, Zn has been investigated in the invention and comparative materials to suppress the redness of Cu and to complement the whitening effect of Mn, as well as to lower the melting temperature of the alloy to improve fluidity and castability.
    [36] In the case of copper (Cu), when it is added in excess of 10% as in Comparative Material 2, a red color appears and loses the whitening effect of Mn, and when added in less than 5% as in Comparative Material 4, workability It was investigated that there was a problem of this deterioration. In addition, as in the invention materials 1 to 10, even if there is a difference in the content of Cu, when added to 5% or more, 10% or less improves the castability and processability of the casting, it can be seen that there is almost no difference in the chromaticity of the gold alloy. .
    [37] In the case of manganese (Mn), an element added for the whitening effect, when the content exceeds 10% by weight, a large amount of slag is generated in the molten metal due to the strong oxidizing property of Mn, thereby decreasing the castability of the molten metal. When added in less than 5% by weight is almost no whitening effect of the gold alloy Inventive materials 1 to 10 of the embodiment of the present invention is limited to 5 to 10% by weight of Mn, the difference in color and castability according to the content However, the difference was found to be insignificant.
    [38] In addition, in the present invention, in order to supplement the whitening effect of the gold alloy, indium (In) is added to replace a part of Mn, Zn, Ag, and Cu constituting the gold alloy of the present invention. Since the workability deteriorates when it exceeds%, it was investigated in Inventive Materials 9-10 that it promotes the whitening effect of a gold alloy by adding in the range which does not exceed 6 weight%.
    [39]
    [40] From the above results, manganese (Mn), silver (Ag), copper (Cu) and zinc (Zn) were made into the alloy composition as described above, and indium (In) was added in place of a part of the alloying element to give white 18K. By manufacturing a gold alloy, nickel (Ni) and expensive palladium (Pd), which causes allergic dermatitis, are completely excluded to prevent allergic dermatitis and reduce manufacturing cost, and have excellent color, castability and processability.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] It is composed of 75% of gold (Au), 5 to 10% of silver (Ag), 5 to 10% of copper (Cu), 5 to 10% of manganese (Mn), and 1 to 6% of zinc (Zn). White 18K gold alloy for jewelry.
    [2" claim-type="Currently amended] The method of claim 1,
    The 18K gold alloy for jewelry is white 18K gold alloy for jewelry, characterized in that indium (In) is further added in the range of 2 to 6% by weight.
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    同族专利:
    公开号 | 公开日
    KR100408749B1|2003-12-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-10-22|Application filed by 주식회사 리골드
    2001-10-22|Priority to KR20010065081A
    2003-05-01|Publication of KR20030033344A
    2003-12-11|Application granted
    2003-12-11|Publication of KR100408749B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR20010065081A|KR100408749B1|2001-10-22|2001-10-22|18k white gold alloys for jewelry|
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