JP3395915B2 - Gold decorative materials hardened by alloying small amounts of components - Google Patents
Gold decorative materials hardened by alloying small amounts of componentsInfo
- Publication number
- JP3395915B2 JP3395915B2 JP19509893A JP19509893A JP3395915B2 JP 3395915 B2 JP3395915 B2 JP 3395915B2 JP 19509893 A JP19509893 A JP 19509893A JP 19509893 A JP19509893 A JP 19509893A JP 3395915 B2 JP3395915 B2 JP 3395915B2
- Authority
- JP
- Japan
- Prior art keywords
- gold
- hardness
- components
- small amounts
- ppm
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、擦り傷や引掻き傷の
つきにくいビッカース硬さ（Ｈｖ）で１００以上の高い
硬さを有し、かつ経時的にも、ろう付けなどの加熱後も
前記高硬度を保持する金装飾品材に関するものである。
【０００２】
【従来の技術】従来、一般にネックチェーンやブロー
チ、あるいは指環などの装飾品の製造に、９９．９９％
以上の純度を有する純金に、ＡｇやＣｕ、さらにＮｉ，
Ｐｄ、およびＺｎなどの合金成分を２５〜４０重量％
（２５〜４０質量％）程度含有させてＫ１４合金やＫ１
８合金などとして、その硬さをＨｖ：１００以上に高め
たＡｕ合金が広く用いられている。
【０００３】
【発明が解決しようとする課題】一方、上記の装飾品は
純金で構成されるのが色調および高級感から理想とされ
ているが、純金は、インゴット状態でＨｖ：３２程度、
加工ワイヤーでＨｖ：８０程度の硬さしかなく、その上
加工硬化しても、その硬さが時間経過と共に低下するば
かりでなく、ろう付けなどの加熱によっても硬さ低下が
さけられず、このように純金装飾品は常に軟質状態にあ
ることから、傷がつき易く、高い美的価値の長期に亘る
維持はきわめて困難であり、したがってその適用は著し
く狭い範囲に限られてしまうのが現状である。
【０００４】
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、純金装飾品のもつ上記の高い美
的価値を失うことなく、これに高硬度を付与すべく研究
を行なった結果、９９．９９％以上の純度を有する純金
（不可避不純物含有量：１００ｐｐｍ以下）に、合金成
分として、全体に占める割合で、
Ｃａ：５５０〜２０００ｐｐｍ 、
Ｌａ：１０〜２００ｐｐｍ 、
を含有させると、硬さがＨｖ：１００以上に向上し、か
つこの高硬度は経時的にも、ろう付けなどの加熱後も保
持され、しかも上記合金成分の含有量が少量なので、純
金のもつ色調および高級感がそのまま維持され、したが
ってこの結果の硬質金で構成された金装飾品は、純金装
飾品と同等の高い美的価値を長期に亘って維持するよう
になるという研究結果を得たのである。
【０００５】この発明は、上記の研究結果にもとづいて
なされたものであって、９９．９９％以上の純度を有す
る純金に、全体に占める割合で、
Ｃａ：５５０〜２０００ppm 、
Ｌａ：１０〜２００ppm 、
を含有させた硬質金で構成してなる金装飾品材に特徴を
有するものである。
【０００６】なお、この発明の金装飾品材において、純
金の純度を９９．９９％以上としたのは、その純度が９
９．９９％未満になると、純金のもつ黄金色の色調に低
下傾向が現われ、高い高級感の維持が困難になるという
理由によるものである。また、ＣａとＬａの含有量をそ
れぞれＣａ：５５０〜２０００ｐｐｍ およびＬａ：１
０〜２００ｐｐｍ としたのは、上記の通りこれら両成
分には共存した状態で硬さをＨｖ：１００以上に高める
と共に、高められた硬さの経時的低下および加熱による
低下を抑制する作用があり、したがってこれら両成分の
うちのいずれかの含有量でも、Ｃａ：５５０ｐｐｍ 未
満およびＬａ：１０ｐｐｍ 未満になると、前記の作用
に所望の効果が得られず、一方その含有量のうちのいず
れかでもＣａ：２０００ｐｐｍ およびＬａ：２００ｐ
ｐｍ を越えると、色調および高級感が損なわれ、美的
価値が低下するようになるという理由にもとづくもので
ある。
【０００７】
【実施例】つぎに、この発明の金装飾品材を実施例によ
り具体的に説明する。通常の真空溶解炉にて、表１に示
される通り、９９．９９％の純度を有する純金を溶解
し、これに同じく表１に示される含有量のＣａおよびＬ
ａを含有させ、ついで直径：２０mm×長さ：１００mmの
寸法をもった円柱状インゴットに鋳造し、インゴットの
端部より試片を切り出して硬さ（マイクロビッカース硬
さ、荷重：１００ｇｒ）を測定した後、面削して単頭伸
線機に送り、ここで２０パスの伸線加工を繰り返し施し
て、直径：０．５ｍｍのワイヤーに加工することにより
本発明金装飾品材を製造した。また、比較の目的でＣａ
およびＬａの含有を行なわない以外は同一の条件で純金
装飾品材を製造した。
【０００８】
【表１】
【０００９】ついで、この結果得られた本発明金装飾品
材および純金装飾品材について、伸線加工直後および６
ヶ月経過後の硬さ（マイクロビッカース硬さ、荷重：１
００ｇｒ）を測定し、さらに伸線加工直後の装飾品材に
対して通常のろう付け条件、すなわちろう材として、例
えば融点：３７０℃のＡｕ：３重量（質量）％Ｓｉ合金
ろう材や、融点：３５０℃のＡｕ−１２％Ｇｅ合金ろう
材などを用い、温度：４５０℃に３０分間保持後冷却の
条件に相当する条件で加熱処理を行なった状態で同じく
同一の条件で硬さを測定した。これらの測定結果を表１
に示した。
【００１０】
【発明の効果】表１に示される結果から、本発明金装飾
品材は、いずれも経時的にも、また加熱によっても変ら
ぬＨｖ：１００以上の高硬度を有し、硬さがＨｖ：１０
０以下で、経時的硬さ低下および加熱による硬さ低下が
著しい純金装飾品材に比して著しくすぐれた硬さ安定性
をもつことが明らかである。上述のように、この発明の
金装飾品材は、傷のつきにくいＨｖ：１００以上の高硬
度を有し、かつこの高硬度は経時的にも加熱にも安定
で、常にＨｖ：１００以上を維持し、さらに合金成分の
含有量も少量なので、純金のもつすぐれた美的価値と同
等の美的価値を有し、かつ前記高硬度を具備することと
相まって、長期に亘って前記美的価値が維持されるなど
有用な特性を有するのである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a high Vickers hardness (Hv) of at least 100, which is resistant to scratches and scratches, and which can be used over time. The present invention relates to a gold decorative material which maintains the high hardness even after heating such as brazing. 2. Description of the Related Art Conventionally, 99.99% is generally used for the production of decorative articles such as neck chains, brooches, and finger rings.
Ag, Cu, Ni,
25-40% by weight of alloy components such as Pd and Zn
(25-40% by mass) to contain K14 alloy or K1
As an 8 alloy or the like, an Au alloy whose hardness is increased to Hv: 100 or more is widely used. [0003] On the other hand, the above ornaments are ideally made of pure gold in terms of color tone and sense of quality, but pure gold has an ingot state of about Hv: 32,
The working wire has a hardness of only about Hv: 80, and even when work hardening occurs, not only does the hardness decrease over time, but the hardness does not decrease due to heating such as brazing. As described above, since pure gold ornaments are always in a soft state, they are easily scratched, and it is extremely difficult to maintain high aesthetic value over a long period of time. Therefore, their application is currently limited to a remarkably narrow range. . [0004] Therefore, the present inventors have proposed:
From the above-mentioned viewpoints, a study was conducted to impart high hardness to the pure gold ornaments without losing the high aesthetic value, and as a result, pure gold having a purity of 99.99% or more (containing inevitable impurities) (Amount: 100 ppm or less), and Ca: 550 to 2000 ppm, La: 10 to 200 ppm, as alloy components, the hardness is improved to Hv: 100 or more, and the high hardness is It is retained over time and even after heating such as brazing, and since the content of the above-mentioned alloy components is small, the color tone and luxury of pure gold are maintained as they are, and thus the gold decoration composed of the resulting hard gold Research has shown that the product will retain the same high aesthetic value over the long term as pure gold ornaments. The present invention has been made on the basis of the above-mentioned research results. In pure gold having a purity of 99.99% or more, Ca: 550 to 2,000 ppm and La: 10 to 200 ppm in the whole. The present invention is characterized in that it is characterized by a gold decorative material made of hard gold containing. In the gold decorative article of the present invention, the purity of pure gold is set to 99.99% or more because the purity is 9%.
When the content is less than 9.99%, the golden color tone of the pure gold tends to decrease, and it is difficult to maintain a high sense of quality. Further, the contents of Ca and La were set to 550 to 2000 ppm of Ca and La: 1, respectively.
The reason for setting the content to 0 to 200 ppm is that, as described above, both components have the effect of increasing the hardness to Hv: 100 or more in a coexisting state, and have the effect of suppressing the reduced hardness over time and the decrease due to heating. Therefore, even if the content of either of these two components is less than 550 ppm of Ca and less than 10 ppm of La, the desired effect cannot be obtained in the above-mentioned action. : 2000 ppm and La: 200p
If it exceeds pm, the color tone and the sense of quality are impaired, and the aesthetic value is reduced. Next, the gold decorative article of the present invention will be specifically described with reference to examples. As shown in Table 1, pure gold having a purity of 99.99% was melted in a normal vacuum melting furnace, and Ca and L having the same contents as shown in Table 1 were added thereto.
a, then cast into a cylindrical ingot having the dimensions of diameter: 20 mm x length: 100 mm, cut out a test piece from the end of the ingot, and measure the hardness (micro Vickers hardness, load: 100 gr) After that, the surface was sent to a single-head wire drawing machine, where it was repeatedly subjected to 20 passes of wire drawing, and processed into a wire having a diameter of 0.5 mm to produce the gold decorative article of the present invention. Also, for the purpose of comparison, Ca
A pure gold decorative material was manufactured under the same conditions except that La and La were not contained. [Table 1] Next, the gold decorative article of the present invention and the pure gold decorative article obtained as a result are obtained immediately after wire drawing and 6 times.
Hardness after months (Micro Vickers hardness, load: 1
00gr) and brazing conditions for the decorative material immediately after wire drawing, that is, as a brazing material, for example, a melting point: 370 ° C., Au: 3 wt. : Using an Au-12% Ge alloy brazing material at 350 ° C., the temperature was maintained at 450 ° C. for 30 minutes, and then the hardness was measured under the same conditions in a state where a heat treatment was performed under the conditions corresponding to the cooling conditions. . Table 1 shows the measurement results.
It was shown to. From the results shown in Table 1, all of the gold decorative articles of the present invention have a high hardness of 100 or more which does not change with time or by heating. Is Hv: 10
When the value is 0 or less, it is apparent that the material has extremely excellent hardness stability as compared with a pure gold decorative material whose hardness decreases with time and hardness is significantly reduced by heating. As described above, the gold decorative material of the present invention has a high hardness of Hv: 100 or more, which is resistant to scratching, and this high hardness is stable with time and heating, and always has a Hv of 100 or more. Since the alloy has a small amount of alloying components, it has an aesthetic value equivalent to the excellent aesthetic value of pure gold, and in combination with the high hardness, the aesthetic value is maintained for a long time. It has useful properties such as
Claims (1)
に、全体に占める割合で、 Ｃａ：５５０〜２０００ｐｐｍ 、 Ｌａ：１０〜２００ｐｐｍ 、 を含有させた硬質金で構成したことを特徴とする少量成
分の合金化で硬質化した金装飾品材。(57) [Claims 1] Hard gold containing pure gold having a purity of 99.99% or more and containing Ca: 550 to 2000 ppm and La: 10 to 200 ppm in proportion to the total. A gold decorative material hardened by alloying a small amount of a component, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19509893A JP3395915B2 (en) | 1993-07-12 | 1993-07-12 | Gold decorative materials hardened by alloying small amounts of components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19509893A JP3395915B2 (en) | 1993-07-12 | 1993-07-12 | Gold decorative materials hardened by alloying small amounts of components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0726340A JPH0726340A (en) | 1995-01-27 |
| JP3395915B2 true JP3395915B2 (en) | 2003-04-14 |
Family
ID=16335494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19509893A Expired - Lifetime JP3395915B2 (en) | 1993-07-12 | 1993-07-12 | Gold decorative materials hardened by alloying small amounts of components |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3395915B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2780611B2 (en) * | 1993-09-06 | 1998-07-30 | 三菱マテリアル株式会社 | Gold decorative materials hardened by alloying small amounts of components |
| JP7369241B1 (en) * | 2022-06-08 | 2023-10-25 | 田中電子工業株式会社 | Gold alloy wire for chain making, its manufacturing method and gold alloy chain |
-
1993
- 1993-07-12 JP JP19509893A patent/JP3395915B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0726340A (en) | 1995-01-27 |
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