JP2009138216A - Method for manufacturing white gold alloy, and jewel using this white gold alloy - Google Patents
Method for manufacturing white gold alloy, and jewel using this white gold alloy Download PDFInfo
- Publication number
- JP2009138216A JP2009138216A JP2007314116A JP2007314116A JP2009138216A JP 2009138216 A JP2009138216 A JP 2009138216A JP 2007314116 A JP2007314116 A JP 2007314116A JP 2007314116 A JP2007314116 A JP 2007314116A JP 2009138216 A JP2009138216 A JP 2009138216A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- white gold
- weight
- gold alloy
- melting
- 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
Links
Landscapes
- Adornments (AREA)
Abstract
Description
本発明は、指輪、ブローチ等の宝飾品（身飾品）を成型した際に、割れや巣の発生が少なく、かつ明白色で、照り（鏡面性）を有する白色金合金（ホワイトゴールド）に関し、特に、金の含有量が７５％前後のＫ１８（１８金）であって、パラジウムが配合されて白色化された宝飾品用のパラジウム配合系白色金合金（地金）の製造方法、及びこの白色金合金（地金）を使用した宝飾品に関するものである。 The present invention relates to a white gold alloy (white gold) having a brilliant (mirror surface) appearance, with few occurrences of cracks and nests when molding jewelry (jewelry) such as rings and brooches, In particular, a method for producing a palladium-containing white gold alloy (base metal) for jewelery that has a gold content of about 18% K18 (18 gold) and is whitened with palladium. It relates to jewelry using gold alloys (bullion).
金は、空気中で酸化されず、長期間にわたって光沢を失わない金属であるが、単独では硬度および強度が低いために、通常は、他の金属との合金（金合金（ホワイトゴールド））として使用する方が、耐久性、加工性等に優れている。
そして、指輪、ブローチ等の宝飾品用の原料（地金）に使用される金合金としては、金の含有率が約７５％（実際には７５％を下回ることなく、７５．０〜７５．５％）のＫ１８（１８金）の白色金合金（ホワイトゴールド）がよく知られている。
この白色金合金は、比重が大きく軟質、かつ高価なプラチナ（白金）と比べて、白金と銀との中間的位置を占める素材であり、さらに、色彩が白色であるため、宝飾品材料として適しているものである。
白色金合金においては、金の色調を白色に導くために、白金（Ｐｔ）と共に（に代えて）、通常パラジウム（Ｐｄ）、銀（Ａｇ）、銅（Ｃｕ）、ニッケル（Ｎｉ）、亜鉛（Ｚｎ）、錫（Ｓｎ），マンガン（Ｍｎ）等の元素が使用されるが、ニッケル（Ｎｉ）を配合した白色金合金には、金属アレルギーの問題がある。
Gold is a metal that does not oxidize in the air and does not lose its luster over a long period of time, but because it has low hardness and strength alone, it is usually an alloy with other metals (gold alloy (white gold)). The one used is superior in durability and workability.
And as a gold alloy used for the raw material (jewelry) for jewelry, such as a ring and a brooch, the content rate of gold is about 75% (actually less than 75%, 75.0-75. 5%) K18 (18 gold) white gold alloy (white gold) is well known.
This white gold alloy is a material that occupies an intermediate position between platinum and silver compared to platinum, which has a large specific gravity, is soft and expensive, and is suitable for jewelery materials because of its white color. It is what.
In the white gold alloy, in order to lead the color of gold to white, together with (in place of) platinum (Pt), usually palladium (Pd), silver (Ag), copper (Cu), nickel (Ni), zinc ( Elements such as Zn), tin (Sn), and manganese (Mn) are used, but white gold alloys containing nickel (Ni) have a problem of metal allergy.
発明者は、Ａｕの色調を白色に導くための元素として、白金（Ｐｔ）、パラジウム（Ｐｄ）、銀（Ａｇ）、銅（Ｃｕ）に注目して、これらを従来知られていなかった一定の割合に配合して鋳造（合金）すれば、既知の白色金合金よりも、明白色で、照り（鏡面性）を有する白色金合金を得ることができることを知り、特許出願した事実がある（特許文献１）。 The inventor pays attention to platinum (Pt), palladium (Pd), silver (Ag), and copper (Cu) as elements for guiding the color tone of Au to white, and these have not been conventionally known. There is a fact that a patent application has been made to know that a white gold alloy having a clear color and shining (specularity) can be obtained by casting (alloy) by mixing in a proportion (patent) Reference 1).
白色金合金（地金）を鋳造（合金）するには、通常下記の方法が採用されている。
（イ）主成分であるＡｕと、Ａｕ除く従成分である金属（Ｐｔ，Ｐｄ，Ａｇ，及びＣｕ）の全てを同時に溶融して鋳造する方法
（ロ）従成分である金属（Ｐｔ，Ｐｄ，Ａｇ，及びＣｕ）のみを同時に溶融して鋳造し、得られる合金（割金）を、主成分であるＡｕと再度合金加工（鋳造）して、目的とする白色金合金を得る方法
In order to cast (alloy) a white gold alloy (base metal), the following method is usually employed.
(A) Method of simultaneously melting and casting all of Au as a main component and subordinate components excluding Au (Pt, Pd, Ag, and Cu) (b) Subordinate component metals (Pt, Pd, A method of obtaining the target white gold alloy by simultaneously melting and casting only Ag and Cu), and alloying (casting) the obtained alloy (split) with Au as the main component again.
ところが、前記（イ）に限らず、これを改良した（ロ）により得られる白色金合金（地金）を用いて、指輪、ネックレース、イヤリング等を成型（キャスティング）すると、高頻度で割れや筋が発生する欠点があった。そしてこれらの欠陥品は再加工せざるを得ない。
そこで、発明者は、以上の欠点を解消するために鋭意研究したところ、（ａ）従成分である金属を、その融点を考慮して、ＰｔとＰｄ，及びＡｇとＣｕとに分けてそれぞれ鋳造（合金）してＰｔ−Ｐｄ合金及びＡｇ−Ｃｕ合金を得た後、（ｂ）最初にＡｕとＰｔ−Ｐｄを鋳造してＡｕ−Ｐｔ−Ｐｄ合金とし、（ｃ）続いて、Ａｇ−Ｃｕ合金を加えて鋳造（合金）して、Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金（白色金合金）とするか、叉は（ｂ）と（ｃ）の順序を逆にして、Ａｕ−Ａｇ−Ｃｕ合金を得た後、Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金とすれば、前記欠点を解消することができることを知り本発明が完成した。
更に、前記白色金合金の原料であるＡｕ、Ｐｔ、Ｐｄ、Ａｇ、Ｃｕは、鋳造する前に、それぞれを単独で溶融し、金属（間）結合中に包摂されている微量の窒素ガス等を放出させた（ガス抜きし）ものを使用すると、前記欠点をほぼ完全に解消することを知り本発明が完成した。
However, it is not limited to the above (a), and when a white gold alloy (base metal) obtained by improving (b) is used to mold a ring, necklace, earring, etc. (casting), cracking occurs frequently. There was a drawback that streaks occurred. These defective products must be reworked.
Therefore, the inventor diligently studied to eliminate the above disadvantages. As a result, (a) the secondary metal was divided into Pt and Pd, and Ag and Cu in consideration of the melting point, respectively. (Alloy) After obtaining a Pt—Pd alloy and an Ag—Cu alloy, (b) First, Au and Pt—Pd are cast to form an Au—Pt—Pd alloy. (C) Subsequently, Ag—Cu An alloy is added and cast (alloy) to obtain an Au—Pt—Pd—Ag—Cu alloy (white gold alloy), or the order of (b) and (c) is reversed, and Au—Ag— After obtaining the Cu alloy, the present invention was completed by knowing that the Au-Pt-Pd-Ag-Cu alloy could eliminate the above-mentioned drawbacks.
Furthermore, Au, Pt, Pd, Ag, and Cu, which are the raw materials of the white gold alloy, are melted individually before casting, and a small amount of nitrogen gas or the like contained in the metal (inter) bond is removed. It was found that the use of the released (degassed) material almost completely eliminated the above-mentioned drawbacks, and the present invention was completed.
本願発明は、下記の請求項１〜請求項７により構成されている。
＜請求項１＞ Ａｕに対し、Ｐｔ，Ｐｄ，Ａｇ，及びＣｕを一定の割合に配合して溶融した後冷却する白色金合金（Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金）の製造方法において、下記の（Ａ）工程及び（Ｂ）工程を先に行い、更に（Ｃ）工程及び（Ｄ）工程を順次経ることを特徴とする白色金合金の製造方法。
（Ａ）工程：ＰｔとＰｄを溶融して、Ｐｔ−Ｐｄ合金を得る工程
（Ｂ）工程：ＡｇとＣｕを溶融して、Ａｇ−Ｃｕ合金を得る工程
（Ｃ）工程：Ａｕに前記（Ａ）のＰｔ−Ｐｄ合金を溶融して、Ａｕ−Ｐｔ−Ｐｄ合金を得る工程
（Ｄ）工程：前記（Ｃ）で得られるＡｕ−Ｐｔ−Ｐｄ合金に、更に前記（Ｂ）のＡｇ−Ｃｕ合金を溶融して、白色金合金（Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金）を得る工程
＜請求項2＞ Ａｕに対し、Ｐｔ，Ｐｄ，Ａｇ，及びＣｕを一定の割合に配合して溶融した後冷却する白色金合金（Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金）の製造方法において、下記の（Ａ）工程及び（Ｂ）工程を先に行い、更に（Ｅ）工程及び（Ｆ）工程を順次経ることを特徴とする白色金合金の製造方法。
（Ａ）工程：ＰｔとＰｄを溶融して、Ｐｔ−Ｐｄ合金を得る工程
（Ｂ）工程：ＡｇとＣｕを溶融して、Ａｇ−Ｃｕ合金を得る工程
（Ｅ）工程：Ａｕに前記（Ｂ）のＡｇ−Ｃｕ合金を溶融して、Ａｕ−Ａｇ−Ｃｕ合金を得る工程
（Ｆ）工程：前記（Ｅ）で得られるＡｕ−Ａｇ−Ｃｕ合金に、更に前記（Ａ）のＰｔ−Ｐｄ合金を溶融して、白色金合金（Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金）を得る工程
＜請求項3＞ Ａｕ，Ｐｔ，Ｐｄ，Ａｇ，及びＣｕを下記の（イ）〜（ヘ）に示す割合で配合する請求項１、又は請求項２に記載する白色金合金の製造方法。
（イ）Ａｕが７０〜７８．０重量％
（ロ）Ｐｔが４．５重量％以上
（ハ）Ｐｄが８．０重量％以上
（ニ）ＰｔとＰｄの和が１９．０重量％以下
（ホ）Ａｇが０，５〜３．０重量％
（ヘ）Ｃｕが２．０〜８．０重量％
＜請求項４＞ Ａｕ、Ｐｔ，Ｐｄ，及びＣｕを下記の（イ）〜（ホ）に示す割合、かつ残部が実質的にＡｇとなるように配合する請求項１、又は請求項２に記載する白色金合金の製造方法。
（イ）Ａｕが７５．０重量％
（ロ）Ｐｔが４．５重量％以上
（ハ）Ｐｄが８．０重量％以上
（ニ）ＰｔとＰｄの和が１９．０重量％以下
（ホ）Ｃｕが２．０〜８．０重量％
＜請求項５＞ Ａｕ，Ｐｔ，Ｐｄ，Ａｇ，及びＣｕを下記の（イ）〜（ホ）に示す割合で配合する請求項１、又は請求項２に記載する白色金合金の製造方法。
（イ）Ａｕが７５．０重量％
（ロ）Ｐｔが７．０重量％
（ハ）Ｐｄが１１．０重量％
（ニ）Ａｇが１．５重量％
（ホ）Ｃｕが５．５重量％
＜請求項６＞ Ａｕ，Ｐｔ，Ｐｄ，Ａｇ，及びＣｕは，各々の単体を溶融し、金属結合中に包摂されているガス（気体）を放出させて除去したものを使用する請求項１〜請求項５に記載する白色金合金の製造方法。
＜請求項７＞ 請求項１〜請求項６記載の製造方法により得られる白色金合金を使用した宝飾品。
This invention is comprised by the following Claims 1-7.
<Claim 1> In the method for producing a white gold alloy (Au—Pt—Pd—Ag—Cu alloy), in which Pt, Pd, Ag, and Cu are mixed at a certain ratio with respect to Au and melted and then cooled. A method for producing a white gold alloy, wherein the following steps (A) and (B) are performed first, and steps (C) and (D) are sequentially performed.
(A) Step: Step of melting Pt and Pd to obtain a Pt—Pd alloy (B) Step: Step of melting Ag and Cu to obtain an Ag—Cu alloy Step (C) Step: The above (A Step (D) for melting Au-Pt-Pd alloy by melting Pt—Pd alloy of ()): In addition to the Au—Pt—Pd alloy obtained in (C) above, the Ag—Cu alloy of (B) above A step of obtaining a white gold alloy (Au—Pt—Pd—Ag—Cu alloy) <Claim 2> Pt, Pd, Ag, and Cu are blended in a certain ratio to Au and melted. In the method of producing a white gold alloy (Au—Pt—Pd—Ag—Cu alloy) to be post-cooled, the following steps (A) and (B) are performed first, and further, steps (E) and (F) are performed. A method for producing a white gold alloy, characterized by sequentially passing.
(A) Step: Step of melting Pt and Pd to obtain a Pt—Pd alloy (B) Step: Step of melting Ag and Cu to obtain an Ag—Cu alloy Step (E) Step: The above (B Step (F) for obtaining an Au—Ag—Cu alloy by melting the Ag—Cu alloy (): In addition to the Au—Ag—Cu alloy obtained in (E), the Pt—Pd alloy (A) Step of obtaining white gold alloy (Au—Pt—Pd—Ag—Cu alloy) <Claim 3> Au, Pt, Pd, Ag, and Cu are shown in the following (a) to (f) The manufacturing method of the white gold alloy of Claim 1 or Claim 2 mix | blended in a ratio.
(B) 70 to 78.0 wt% of Au
(B) Pt is 4.5% by weight or more (c) Pd is 8.0% by weight or more (d) The sum of Pt and Pd is 19.0% by weight or less (e) Ag is 0.5 to 3.0% by weight %
(F) Cu is 2.0 to 8.0% by weight
<Claim 4> Claim 1 or Claim 2 which mix | blends Au, Pt, Pd, and Cu so that the ratio shown to following (a)-(e) and the remainder may become substantially Ag. A method for producing a white gold alloy.
(B) Au is 75.0% by weight
(B) Pt is 4.5% by weight or more (c) Pd is 8.0% by weight or more (d) The sum of Pt and Pd is 19.0% by weight or less (e) Cu is 2.0 to 8.0% by weight %
<Claim 5> The method for producing a white gold alloy according to claim 1 or 2, wherein Au, Pt, Pd, Ag, and Cu are blended in proportions shown in the following (a) to (e).
(B) Au is 75.0% by weight
(B) Pt is 7.0% by weight
(C) Pd is 11.0% by weight
(D) 1.5% by weight of Ag
(E) Cu is 5.5% by weight
<Claim 6> The Au, Pt, Pd, Ag, and Cu used are those obtained by melting each simple substance and releasing and removing the gas (gas) contained in the metal bond. A method for producing a white gold alloy according to claim 5.
<Claim 7> A jewelery using a white gold alloy obtained by the production method according to any one of claims 1 to 6.
本願発明を以上のように構成する理由は、次のとおりである。
（イ）ＡｕとＰｔ−Ｐｄ合金からＡｕ−Ｐｔ−Ｐｄ合金を鋳造し、更に、Ａｇ−Ｃｕ合金を加えて鋳造してＡｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金とした地金を用いて、指輪、ネックレース、イヤリング等の宝飾品を成型（キャスティング）すれば、割れや、筋の発生を防止できること（請求項１）。
（ロ）ＡｕとＡｇ−Ｃｕ合金からＡｕ−Ａｇ−Ｃｕ合金を鋳造し、更に、Ｐｔ−Ｐｄ合金を加えて鋳造してＡｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金とした地金を用いて、指輪、ネックレース、イヤリング等の宝飾品を成型（キャスティング）すれば、割れや、筋の発生を防止できること（請求項２）。
（ハ）前記（イ）、（ロ）に加えて、原料であるＡｕ、Ｐｔ、Ｐｄ、Ａｇ、Ｃｕは、それぞれ単独でガス抜きしたものを使用することにより、ほぼ完全に割れや、筋の発生を防止できること（請求項５）。
（ニ）従来品の白色金合金は、Ｐｄが５％〜７％配合された、地金が主流で、そのΔＥ（後述）は、１０〜１４の範囲で、肉眼で見た感じは、薄茶色である。そのため、その白色金合金の上にロジウム（Ｒｈ）鍍金（メッキ）をかけて白色にして使用しているのが一般である。
しかしながら、これを指輪、ブローチ等に加工して使用を継続していると、鍍金が剥がれ、茶色く変色した感じになる欠点があった。
これに対し、Ａｕ、Ｐｔ、Ｐｄ、Ａｇ、Ｃｕを、請求項３〜請求項５に記載した一定の割合で配合し、前記（イ）、（ロ）、（ハ）等の方法により鋳造した地金を用いて宝飾品を鋳造すれば、従来品とは異なる明白色で、照り（鏡面性）を有する白色金合金製の宝飾品が、極めて効率よく得られること（請求項３〜請求項５、請求項７）。
The reason why the present invention is configured as described above is as follows.
(A) An Au—Pt—Pd alloy is cast from Au and a Pt—Pd alloy, and further, an Ag—Cu alloy is added and cast to form an Au—Pt—Pd—Ag—Cu alloy. If jewelry such as rings, necklaces, and earrings is molded (casting), cracks and streaks can be prevented (claim 1).
(B) An Au-Ag-Cu alloy is cast from Au and an Ag-Cu alloy, and further, a Pt-Pd alloy is added and cast to form an Au-Pt-Pd-Ag-Cu alloy. If jewelry such as rings, necklaces, and earrings is molded (casting), cracks and streaks can be prevented (claim 2).
(C) In addition to (a) and (b) above, the raw materials Au, Pt, Pd, Ag, and Cu are almost completely cracked and Generation | occurrence | production can be prevented (Claim 5).
(D) The conventional white gold alloy is mainly ingots containing 5% to 7% Pd. The ΔE (described later) is in the range of 10 to 14, and the feeling seen with the naked eye is light brown. Color. Therefore, in general, rhodium (Rh) plating (plating) is applied to the white gold alloy to make it white.
However, if this was processed into a ring, brooch or the like and continued to be used, there was a drawback that the plating peeled off and the color turned brown.
On the other hand, Au, Pt, Pd, Ag, and Cu are blended at a constant ratio described in claims 3 to 5 and cast by the methods (a), (b), and (c). If jewelry is cast using a bullion, jewelry made of white gold alloy having a clear color different from conventional products and having shine (mirror finish) can be obtained very efficiently. 5. Claim 7).
本願発明に係る金合金を請求項３〜請求項５に記載した一定の割合で配合する理由は、次のとおりである。
（イ）Ａｕの金色の脱色（白色化）作用がある元素はＰｄであるが、Ｐｄは含有量が増すと、黒っぽくなるので、それを抑える為に、Ｐｔを一定量配合すれば白さをだすことができること。
（ロ）ＰｄとＰｔの配合割合が、下記の（ａ）〜（ｃ）のとき、色バランスが良好となること。
（ａ）Ｐｔが４．５重量％以上
（ｂ）Ｐｄが８重量％以上
（ｃ）Ｐｔ＋Ｐｄ＜１９重量％
（ハ）Ｐｔ＋Ｐｄ＞１９重量％になる（を超える）と、仕上げ工程でのバフ（研磨処理）のノリが非常に悪くなり、その結果、照りが（鏡面性）がなくなること。これは、白金族の特徴である粘りが大きく影響しているからと思われる。
（ニ）バフのノリを良くするために、Ｃｕを一定量加える必要があること。Ｃｕを加えることにより、Ｃｕ合金の特徴である、硬さと磨耗性が増し、融点を下げることができる。
（ホ）Ｃｕの添加効果を高めるために、Ａｇの併用が重要であること。
The reason why the gold alloy according to the present invention is blended at a certain ratio described in claims 3 to 5 is as follows.
(B) The element that has a gold decoloring (whitening) action of Au is Pd, but as the content of Pd increases, it becomes darker. Therefore, in order to suppress it, whiteness can be reduced by adding a certain amount of Pt. What you can do.
(B) When the blending ratio of Pd and Pt is the following (a) to (c), the color balance is good.
(A) Pt is 4.5 wt% or more (b) Pd is 8 wt% or more (c) Pt + Pd <19 wt%
(C) When Pt + Pd> 19% by weight (exceeds), the buffing (polishing treatment) in the finishing process becomes very poor, and as a result, the shine (mirror finish) is lost. This seems to be because the stickiness, which is a characteristic of the platinum group, is greatly influenced.
(D) It is necessary to add a certain amount of Cu in order to improve the buffing. By adding Cu, the hardness and wear characteristics, which are the characteristics of the Cu alloy, can be increased, and the melting point can be lowered.
(E) In order to enhance the effect of adding Cu, the combined use of Ag is important.
本願発明において、白色金合金の白さを表す「ΔＥ（合金の色差）」とは、その合金の色を色差計によりＬａｂ方式で計測し、示された３つの数値（L，ａ，ｂ）を、ロジウム鍍金色（Ｌ＝８７．０５，ａ＝１．１８，ｂ＝２．６８）を基準値０として、Δ数値（ΔＬ,Δa,Δb）に換算し、３つのΔ数値をそれぞれ２乗して加えた合計を√２で割った数値をいう。
具体的には、市販の色差計（例：紫外−可視分光光度計〔日本分光株式会社Ｖ−５７０〕で測定する。
白色金合金（ホワイトゴールド）の色の範囲は、ΔＥ０〜ΔＥ１４までとする。
In the present invention, “ΔE (alloy color difference)” representing the whiteness of a white gold alloy is the color of the alloy measured by the Lab method using a color difference meter, and the indicated three numerical values (L, a, b) Is converted into Δ numerical values (ΔL, Δa, Δb) with a rhodium gold color (L = 87.05, a = 1.18, b = 2.68) as a reference value 0, and each of the three Δ numerical values is 2 This is the value obtained by dividing the sum added by multiplication by √2.
Specifically, it is measured with a commercially available color difference meter (eg, UV-visible spectrophotometer [JASCO Corporation V-570]).
The color range of the white gold alloy (white gold) is from ΔE0 to ΔE14.
（ａ）指輪、ネックレース、イヤリング等の宝飾品を成型（キャスティング）する際に、割れや、筋の発生を生じない白色金合金の地金を得ることができる。
又、この地金を用いて、巣や割れのない種々の宝飾品を効率よく製造することができる。
（ｂ）一般的な、白色金合金（ホワイトゴールド）は、硬く・脆く・照り（鏡面性）がでにくい合金が多く、白さはあっても照り（鏡面性）が無いため明るく見えず、その結果ΔＥの値も、Ｋ１８Ｋ（ＷＧ）＝ΔＥ７程度である。
これに対し、本願発明に係る白色金合金は、ΔＥの値が７以下（好ましくは６．０以下）の白色金合金を容易に得ることができる。
（ｃ）ロジウム鍍金（メッキ）をかけないで、特有の白さを持った地金を得ることができる。
（ｄ）良好な鋳造・加工性、良好な磨き具合・照り（鏡面性）のでき具合等を合わせ持った地金を得ることができる。
（ｅ）従来のＰｄ割（系）、Ｎｉ割（系）、Ｍｎ割（系）では、出せない白さを出すことができる。
（ｇ）本願発明に係る白色金合金は、加工に適した硬さ（ビッカース硬さ（Ｈｖ）で、１２０〜１４０ＨＶ程度）を有している。
（ｆ）通常金系の地金と同様に磨きを行うことができる。
(A) When a jewelry such as a ring, a necklace, and an earring is molded (casting), a white gold alloy bullion that does not crack or generate streaks can be obtained.
Moreover, various jewelry without a nest and a crack can be efficiently manufactured using this bullion.
(B) Many common white gold alloys (white gold) are hard, brittle, and hard to shine (specularity). As a result, the value of ΔE is about K18K (WG) = ΔE7.
On the other hand, the white gold alloy according to the present invention can easily obtain a white gold alloy having a ΔE value of 7 or less (preferably 6.0 or less).
(C) A bullion with specific whiteness can be obtained without applying rhodium plating (plating).
(D) It is possible to obtain a bullion having a good casting / workability and a good polishing / shine (mirror finish).
(E) Whiteness that cannot be produced with the conventional Pd split (system), Ni split (system), and Mn split (system) can be obtained.
(G) The white gold alloy according to the present invention has a hardness suitable for processing (Vickers hardness (Hv), about 120 to 140 HV).
(F) Polishing can be performed in the same manner as ordinary gold-based bullion.
本願発明に係る白色金合金の製造方法において、地金を合金する際に必要とする温度は、概ね次のとおりである。
ａ）Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ
上昇温度 ：１３９０℃〜１５５０℃
型に流す温度：１２００℃〜１３００℃
ｂ）Ｐｔ−Ｐｄ
上昇温度： １７７０℃〜１８８０℃
型に流す温度：１５５０℃〜１６５０℃
ｃ）Ａｇ−Ｃｕ
上昇温度： １１００℃〜１２００℃
型に流す温度： ９５０℃〜１０８０℃
ｄ）Ａｕ−Ｐｄ−Ｐｔ
上昇温度： １４５０℃〜１６５０℃
型に流す温度：１３５０℃〜１４５０℃
ｅ）Ａｕ−Ａｇ−Ｃｕ
上昇温度： １１００℃〜１２５０℃
型に流す温度：１０２０℃〜１１５０℃
In the method for producing a white gold alloy according to the present invention, the temperature required for alloying the base metal is generally as follows.
a) Au-Pt-Pd-Ag-Cu
Rise temperature: 1390 ° C to 1550 ° C
Temperature flowing through the mold: 1200 ° C to 1300 ° C
b) Pt-Pd
Rise temperature: 1770 ° C to 1880 ° C
Temperature flowing through mold: 1550 ° C to 1650 ° C
c) Ag-Cu
Rise temperature: 1100 ° C to 1200 ° C
Temperature flowing through the mold: 950 ° C to 1080 ° C
d) Au-Pd-Pt
Rise temperature: 1450 ° C to 1650 ° C
Temperature flowing through the mold: 1350 ° C to 1450 ° C
e) Au-Ag-Cu
Rise temperature: 1100 ° C to 1250 ° C
Temperature flowing through the mold: 1020 ° C to 1150 ° C
下記に記載する配合と方法により地金を鋳造し、得られた地金について、割れと筋の発生状態を調べた。
（１）地金（合金）の配合
Ａｕ：７５．０重量％
Ｐｔ： ７．０重量％
Ｐｄ：１１．０重量％
Ａｇ： １．５重量％
Ｃｕ： ５．５重量％
Ingots were cast by the composition and method described below, and the resulting ingots were examined for cracking and streaking.
(1) Blending of bare metal (alloy) Au: 75.0% by weight
Pt: 7.0% by weight
Pd: 11.0% by weight
Ag: 1.5% by weight
Cu: 5.5% by weight
（２）地金の鋳造（合金）の順序
（ａ）Ａｕ、Ｐｔ、Ｐｄ、Ａｇ、Ｃｕを同時に鋳造してＡｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金とする。
（ｂ）Ｐｔ、Ｐｄ、Ａｇ、Ｃｕを鋳造して、Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金（割金）とした後、Ａｕと鋳造してＡｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金とする。
（ｃ）予めＰｔ−Ｐｄ、及びＡｇ−Ｃｕ合金とした後、Ａｕ−Ｐｄ−Ｐｔ合金とし、次にＡｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金とする。
（ｄ）予めＰｔ−Ｐｄ、及びＡｇ−Ｃｕ合金とした後、Ａｕ−Ａｇ−Ｃｕ合金とし、次にＡｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金とする。
なお、Ａｕ、Ｐｔ、Ｐｄ、Ａｇ、Ｃｕを予め単体で溶融・精錬した元素を使用し、（ａ）〜（ｄ）の方法で合金した地金を、それぞれ（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）とする。単体の溶融・精錬温度は、単体の融点プラス１００〜２５０℃程度である。
(2) Order of casting (alloy) of metal (a) Au, Pt, Pd, Ag, and Cu are cast simultaneously to form an Au—Pt—Pd—Ag—Cu alloy.
(B) Pt, Pd, Ag, and Cu are cast to form a Pt—Pd—Ag—Cu alloy (split), and then cast to Au to obtain an Au—Pt—Pd—Ag—Cu alloy.
(C) Pt—Pd and Ag—Cu alloy are made in advance, then Au—Pd—Pt alloy, and then Au—Pt—Pd—Ag—Cu alloy.
(D) Pt—Pd and Ag—Cu alloy are made in advance, then Au—Ag—Cu alloy is made, and then Au—Pt—Pd—Ag—Cu alloy is made.
In addition, using an element in which Au, Pt, Pd, Ag, and Cu are previously melted and refined alone, alloys (A), (B), ( C) and (D). The melting and refining temperature of a single substance is about the melting point of the single substance plus about 100 to 250 ° C.
（３）地金の合金温度
Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ：１４００℃まで上昇させ、その後１２６０℃まで下げ、型に流した
Ｐｔ−Ｐｄ：１７８０℃まで上昇させ、その後１６００℃まで下げ、型に流した
Ａｇ−Ｃｕ：１１５０℃まで上昇させ、その後１０２０℃まで下げ、型に流した
Ａｕ−Ｐｄ−Ｐｔ：１５８０℃まで上昇させ、その後１４００℃まで下げ、型に流した
Ａｕ−Ａｇ−Ｃｕ：１１５０℃まで上昇させ、その後１０６０℃まで下げ、型に流した
(3) Alloy temperature of bare metal Au-Pt-Pd-Ag-Cu: raised to 1400 ° C, then lowered to 1260 ° C, raised to 1780 ° C Pt-Pd flowed into the mold, then lowered to 1600 ° C, Ag-Cu flowed into the mold: raised to 1150 ° C, then lowered to 1020 ° C, Au-Pd-Pt flowed into the mold: raised to 1580 ° C, then lowered to 1400 ° C, and flowed into the mold Au-Ag- Cu: raised to 1150 ° C., then lowered to 1060 ° C. and poured into mold
（４）１．１ｍｍ丸線試験
（イ）検体の作製
検体の寸法：直径１ｍｍ×４ｃｍの円線
検体数：各２０本
使用合金量：１２０．００ｇ
使用鋳造機：TR式高周波発振器 型式NTR−0502SHI−S 出力5Kw 周波数50KHz カーボン坩堝使用（株）日精販売 メーカー（株）日電高周波
電気炉：（株）安井インターテック
鋳型温度：各７４０℃
鋳造温度：各１３４０℃
鋳型へセットしてから鋳造までの時間：３分３０秒
(4) 1.1 mm round wire test (a) Preparation of specimen Specimen dimensions: Circular line with a diameter of 1 mm x 4 cm Number of specimens: 20 each Amount of alloy used: 120.00 g
Casting machine used: TR type high frequency oscillator Model NTR-0502SHI-S Output 5Kw Frequency 50KHz Using carbon crucible Nissei Sales Co., Ltd. Manufacturer Niden High Frequency Electric furnace: Yasui Intertec Co., Ltd. Mold temperature: 740 ° C each
Casting temperature: 1340 ° C each
Time from casting to casting: 3 minutes 30 seconds
前記８種類（（ａ）〜（ｄ）、（Ａ）〜（Ｄ））のツリー形状（鋳型になる形状）、埋没方法、脱漏方法、及び鋳造方法は、下記により全て同一の条件で行った。
ツリー形状：直径８ｍｍ，高さ１２０ｍｍの円柱に、試験資材を円柱に対して、上方向へ角度２５度で上から４本ずつ配置し、２０ｍｍ下の段から付けて、５段のツリー形状とした。
埋没方法：（株）ノリタケカンパニー社のギフトを使用し、水との混合比３８％で、（株）愛工舎製作所の混和器で２分混合し、（株）安井インターテックの脱法器で1分空気を抜き、1時間乾燥の為放置した（室温２５℃，湿度６０％）。
脱漏方法：（株）カトーの温風ヒーターを使用し、温度設定１５０℃、１時間タイマーオフで中のワックスを抜いた。
鋳造方法：鋳型温度７４０℃，鋳造温度１３４０℃に設定した。その後真空状態にして、ゆっくり温度を上昇させ、設定温度に達したら、窒素ガスを使用し３気圧の圧力で地金を押し込んで鋳造した（鋳型セットから約３分３０秒を要した）。
The eight types ((a) to (d), (A) to (D)) of the tree shape (shape to be a mold), the burying method, the leakage method, and the casting method were all performed under the same conditions as described below. .
Tree shape: Four columns of test materials are arranged on a cylinder with a diameter of 8 mm and a height of 120 mm from the top at an angle of 25 degrees upward with respect to the cylinder, and attached from the lower stage of 20 mm. did.
Method of burying: Using a gift from Noritake Co., Ltd., mixing with water at a mixing ratio of 38% for 2 minutes with a mixer at Aikosha Seisakusho Co., Ltd. The air was evacuated and left to dry for 1 hour (room temperature 25 ° C., humidity 60%).
Leakage method: Using a hot air heater of Kato Co., Ltd., the wax was removed by setting the temperature at 150 ° C. for 1 hour with the timer off.
Casting method: The mold temperature was set to 740 ° C and the casting temperature was set to 1340 ° C. After that, a vacuum was applied, the temperature was slowly raised, and when the set temperature was reached, casting was performed by using a nitrogen gas and pushing the metal at a pressure of 3 atm (approximately 3 minutes 30 seconds from the mold set).
（ロ）割れと筋の判別方法
検体の表面を１０倍のルーペにより肉眼で観察した。
(B) Method for discriminating cracks and muscles The surface of the specimen was observed with the naked eye using a 10-times magnifier.
（５）２．２０×２０×１ｍｍ板材試験
（イ）検体の作製
検体の寸法：（２．２０×２０×１）ｍｍ板材
検体数：各２０枚
使用合金量：１４０．００ｇ
使用鋳造機：TR式高周波発振器 型式NTR−0502SHI−S 出力5Kw 周波数50KHz カーボン坩堝使用（株）日精販売 メーカー（株）日電高周波
電気炉：（株）安井インターテック
鋳型温度：各７４０℃
鋳造温度：各１３４０℃
鋳型へセットしてから鋳造までの時間：３分３０秒
なお、前記８種類（（ａ）〜（ｄ）、（Ａ）〜（Ｄ））のツリー形状、埋没方法、脱漏方法、電気炉温度、及び鋳造方法は前記全て同一の条件で行った。
ツリー形状：直径８ｍｍ，高さ１２０ｍｍの円柱に、試験資材を円柱に対して、上方向へ角度２５度、上から４本ずつ配置し、２０ｍｍ下の段から付けて、５段のツリー形状とした。
埋没方法：（株）ノリタケカンパニー社のギフト（埋没材）を使用し、水との混合比３８％（株）愛工舎製作所の混和器で２分混合し、（株）安井インターテックの脱法器で１分間空気を抜き、その後混合した埋没材をツリーの型に流し込み、再度脱法器で1分間空気を抜き1時間乾燥の為放置した（室温２５℃，湿度６０％）。
脱漏方法：（株）カトーの温風ヒーターを使用し、温度設定１５０℃，１時間タイマーオフで脱漏器の中で、ワックスを溶かした。
電気炉温度：（株）安井インターテック社製の電気炉を使用し、１０時間かけて、温度を７４０℃までゆっくり上昇させた。
鋳造方法：鋳型温度を７４０℃，鋳造温度１３４０℃に設定した。真空状態にし、ゆっくり温度を上昇させ、設定温度に達したら、窒素ガスを使用し、３気圧の圧力で地金を押し込んで鋳造した（鋳型セットから３分３０秒）。
(5) 2.20 × 20 × 1 mm plate material test (a) Preparation of specimen Specimen dimensions: (2.20 × 20 × 1) mm plate material Number of specimens: 20 for each Amount of alloy used: 140.00 g
Casting machine used: TR type high frequency oscillator Model NTR-0502SHI-S Output 5Kw Frequency 50KHz Using carbon crucible Nissei Sales Co., Ltd. Manufacturer Niden High Frequency Electric furnace: Yasui Intertec Co., Ltd. Mold temperature: 740 ° C each
Casting temperature: 1340 ° C each
Time from setting to mold to casting: 3 minutes 30 seconds In addition, the above-mentioned 8 types ((a) to (d), (A) to (D)) of tree shape, burying method, leakage method, electric furnace temperature The casting method was performed under the same conditions.
Tree shape: A test material is placed on a cylinder having a diameter of 8 mm and a height of 120 mm, and four test pieces are arranged from the top at an angle of 25 degrees with respect to the cylinder. did.
Method of burying: Using gift (buried material) from Noritake Co., Ltd., mixing with water for 38%, mixing for 2 minutes with a mixer at Aikosha Seisakusho Co., Ltd. The mixture was poured into a tree mold for 1 minute, and then poured again into the mold of the tree, and again for 1 minute with the devolatilizer and left to dry for 1 hour (room temperature 25 ° C., humidity 60%).
Leakage method: Wax was melted in a leaker using a warm air heater of Kato Co., Ltd., with a temperature setting of 150 ° C. and a timer off for 1 hour.
Electric furnace temperature: Using an electric furnace manufactured by Yasui Intertec Co., Ltd., the temperature was slowly raised to 740 ° C. over 10 hours.
Casting method: mold temperature was set to 740 ° C. and casting temperature 1340 ° C. When the temperature was slowly raised and reached the set temperature, nitrogen gas was used and the metal was pushed in at a pressure of 3 atm to cast (3 minutes 30 seconds from the mold set).
以下、通常の磨き仕上げ工程（電解研磨、磁気バレル、表面処理、形状成型、磨き工程等）を経て検体をえた。 Hereinafter, the specimen was obtained through a normal polishing finishing process (electrolytic polishing, magnetic barrel, surface treatment, shape molding, polishing process, etc.).
（ロ）割れと筋の判別方法
検体の表面を１０倍のルーペにより肉眼で観察した。
(B) Method for discriminating cracks and muscles The surface of the specimen was observed with the naked eye using a 10-times magnifier.
（６）割れと筋の発生状況を表１に示す。 (6) Table 1 shows the occurrence of cracks and streaks.
表１の結果によれば、割れと筋の発生は、（Ｃ）、又は（Ｄ）の方法によれば、ほぼ完全に防止することができる。 According to the results in Table 1, the occurrence of cracks and streaks can be almost completely prevented by the method (C) or (D).
下記の表２に、前記（Ｃ）の方法を用い、請求項３の範囲の配合を中心として、種々の配合で鋳造した白色金合金のΔＥの値を示す。 Table 2 below shows ΔE values of white gold alloys cast using various methods, centering on the range of claim 3 using the method (C).
表２中、Ａｕの含有量が７８．０重量％を超えるもの（Ｎｏ．１，２，４，５，７，１０，１９，２２）は、Ａｕの含有量が多すぎて、ΔＥを７．０以下とすることができない。
又、Ｐｔ＋Ｐｄ＞１９重量％である配合（Ｎｏ．３１〜３６）は、加工性が悪く、本願発明の範囲（請求項１）には入らないものである。
In Table 2, when the content of Au exceeds 78.0% by weight (No. 1, 2, 4, 5, 7, 10, 19, 22), the content of Au is too large, and ΔE is 7 Cannot be less than 0.0.
Further, the formulation (No. 31 to 36) in which Pt + Pd> 19% by weight has poor processability and does not fall within the scope of the present invention (Claim 1).
表３に、請求項４に記載した条件の配合で鋳造した白色金合金の配合とΔＥの値を示す。 Table 3 shows the composition of the white gold alloy cast under the composition described in claim 4 and the value of ΔE.
表３中、Ｎｏ．７１に示す配合が、金含有量７５重量％（Ｋ１８）において最良の結果を示すものである（請求項５）。 In Table 3, No. The formulation shown in 71 shows the best results at a gold content of 75% by weight (K18) (Claim 5).
なお、下記の表４（Ｎｏ．９１〜９５）に従来の白色金合金のΔＥの値の例を示す。いずれもΔＥの値が７．０を超えている。 Table 4 below (Nos. 91 to 95) shows examples of ΔE values of conventional white gold alloys. In both cases, the value of ΔE exceeds 7.0.
実施例１の配合で、（Ｄ）の方法を用いて得られた地金から、真空吸引加圧鋳造法にて、宝飾品である指輪を試作した。ホワイトクリスタルバライト系埋没材、セラミック系埋没材、燐酸塩系埋没材が使用可能であった。
得られた指輪は、割れや筋等の欠陥、及び鋳巣が全くない良好な鋳造物が得られた。
又、この鋳造物を切削加工、バフ研磨を経て鏡面性（照り、金属光沢）を有する状態まで仕上げたところ、この工程でも割れや、筋等の欠陥、鋳巣は全く生じなかった。
A ring, which is a jewelery, was prototyped from the bare metal obtained using the method (D) in the formulation of Example 1 by the vacuum suction pressure casting method. White crystal barite-based investment material, ceramic-based investment material, and phosphate-based investment material could be used.
The obtained ring was a good casting with no defects such as cracks and streaks, and no casting hole.
Moreover, when this cast was finished to a state having specularity (shining, metallic luster) through cutting and buffing, cracks, defects such as streaks, and cast holes did not occur at all in this process.
前記段落〔００１８〕（５）の「２．２０×２０×１ｍｍ板材」を試験体とし、下記の試験を行った。
（１）耐酸性
試験体：板材3枚のうち、１枚を保存用とし、２枚に下記の処理をした。
虐待試験：５％希硫酸に１０分間浸漬後、水洗し、４週間、紫外線の当たる窓際に放置。
判定方法：１０倍のルーペで肉眼により、確認した。
試験結果：変化なし。
（２）耐アルカリ性
試験体：板材3枚のうち、１枚を保存用とし、２枚に下記の処理をした。
虐待試験：２８％アンモニア水に１０分間浸漬後、水洗し、４週間、紫外線のあたる窓際に放置。
判定方法：１０倍のルーペで肉眼により、確認した。
試験結果：変化なし。
（３）変色状況
確認の結果、変色は現われず、極めて、耐酸性・耐アルカリ性に優れた合金であルことが確認された。
Using the “2.20 × 20 × 1 mm plate” in paragraph [0018] (5) as a test specimen, the following tests were conducted.
(1) Acid resistance Specimen: One of three sheets was used for storage, and the following treatment was applied to two sheets.
Abuse test: Soaked in 5% dilute sulfuric acid for 10 minutes, washed with water, and left at the window exposed to ultraviolet rays for 4 weeks.
Judgment method: It confirmed with the naked eye with a 10 times magnifier.
Test result: No change.
(2) Alkali resistance Specimen: Of the three plate materials, one was used for storage, and the following treatment was performed on two plates.
Abuse test: Soaked in 28% aqueous ammonia for 10 minutes, washed with water, and left at the window exposed to ultraviolet rays for 4 weeks.
Judgment method: It confirmed with the naked eye with a 10 times magnifier.
Test result: No change.
(3) Discoloration As a result of confirmation, discoloration did not appear and it was confirmed that the alloy was extremely excellent in acid resistance and alkali resistance.
Claims (7)
（Ａ）工程：ＰｔとＰｄを溶融して、Ｐｔ−Ｐｄ合金を得る工程
（Ｂ）工程：ＡｇとＣｕを溶融して、Ａｇ−Ｃｕ合金を得る工程
（Ｃ）工程：Ａｕに前記（Ａ）のＰｔ−Ｐｄ合金を溶融して、Ａｕ−Ｐｔ−Ｐｄ合金を得る工程
（Ｄ）工程：前記（Ｃ）で得られるＡｕ−Ｐｔ−Ｐｄ合金に、更に前記（Ｂ）のＡｇ−Ｃｕ合金を溶融して、白色金合金（Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金）を得る工程 In the method for producing a white gold alloy (Au—Pt—Pd—Ag—Cu alloy) in which Pt, Pd, Ag, and Cu are mixed in a certain ratio with respect to Au and melted and then cooled, the following (A) A method for producing a white gold alloy, wherein the step and the step (B) are performed first, and then the step (C) and the step (D) are sequentially performed.
(A) Step: Step of melting Pt and Pd to obtain a Pt—Pd alloy (B) Step: Step of melting Ag and Cu to obtain an Ag—Cu alloy Step (C) Step: The above (A Step (D) for melting Au-Pt-Pd alloy by melting Pt—Pd alloy of ()): In addition to the Au—Pt—Pd alloy obtained in (C) above, the Ag—Cu alloy of (B) above A white gold alloy (Au—Pt—Pd—Ag—Cu alloy) by melting
（Ａ）工程：ＰｔとＰｄを溶融して、Ｐｔ−Ｐｄ合金を得る工程
（Ｂ）工程：ＡｇとＣｕを溶融して、Ａｇ−Ｃｕ合金を得る工程
（Ｅ）工程：Ａｕに前記（Ｂ）のＡｇ−Ｃｕ合金を溶融して、Ａｕ−Ａｇ−Ｃｕ合金を得る工程
（Ｆ）工程：前記（Ｅ）で得られるＡｕ−Ａｇ−Ｃｕ合金に、更に前記（Ａ）のＰｔ−Ｐｄ合金を溶融して、白色金合金（Ａｕ−Ｐｔ−Ｐｄ−Ａｇ−Ｃｕ合金）を得る工程 In the method for producing a white gold alloy (Au—Pt—Pd—Ag—Cu alloy) in which Pt, Pd, Ag, and Cu are mixed in a certain ratio with respect to Au and melted and then cooled, the following (A) A method for producing a white gold alloy, wherein the step and the step (B) are performed first, and the step (E) and the step (F) are sequentially performed.
(A) Step: Step of melting Pt and Pd to obtain a Pt—Pd alloy (B) Step: Step of melting Ag and Cu to obtain an Ag—Cu alloy Step (E) Step: The above (B Step (F) for obtaining an Au—Ag—Cu alloy by melting the Ag—Cu alloy (): In addition to the Au—Ag—Cu alloy obtained in (E), the Pt—Pd alloy (A) A white gold alloy (Au—Pt—Pd—Ag—Cu alloy) by melting
（イ）Ａｕが７０〜７８．０重量％
（ロ）Ｐｔが４．５重量％以上
（ハ）Ｐｄが８．０重量％以上
（ニ）ＰｔとＰｄの和が１９．０重量％以下
（ホ）Ａｇが０，５〜３．０重量％
（ヘ）Ｃｕが２．０〜８．０重量％ The method for producing a white gold alloy according to claim 1 or 2, wherein Au, Pt, Pd, Ag, and Cu are blended in proportions shown in the following (a) to (f).
(B) 70 to 78.0 wt% of Au
(B) Pt is 4.5% by weight or more (c) Pd is 8.0% by weight or more (d) The sum of Pt and Pd is 19.0% by weight or less (e) Ag is 0.5 to 3.0% by weight %
(F) Cu is 2.0 to 8.0% by weight
（イ）Ａｕが７５．０重量％
（ロ）Ｐｔが４．５重量％以上
（ハ）Ｐｄが８．０重量％以上
（ニ）ＰｔとＰｄの和が１９．０重量％以下
（ホ）Ｃｕが２．０〜８．０重量％ The white gold alloy according to claim 1 or 2, wherein Au, Pt, Pd, and Cu are blended in proportions shown in the following (a) to (e), and the balance is substantially Ag. Manufacturing method.
(B) Au is 75.0% by weight
(B) Pt is 4.5% by weight or more (c) Pd is 8.0% by weight or more (d) The sum of Pt and Pd is 19.0% by weight or less (e) Cu is 2.0 to 8.0% by weight %
（イ）Ａｕが７５．０重量％
（ロ）Ｐｔが７．０重量％
（ハ）Ｐｄが１１．０重量％
（ニ）Ａｇが１．５重量％
（ホ）Ｃｕが５．５重量％ The method for producing a white gold alloy according to claim 1 or 2, wherein Au, Pt, Pd, Ag, and Cu are blended in proportions shown in the following (a) to (e).
(B) Au is 75.0% by weight
(B) Pt is 7.0% by weight
(C) Pd is 11.0% by weight
(D) 1.5% by weight of Ag
(E) Cu is 5.5% by weight
The jewelry using the white gold alloy obtained by the manufacturing method of Claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007314116A JP4184418B1 (en) | 2007-12-05 | 2007-12-05 | Method for producing white gold alloy and jewelry using this white gold alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007314116A JP4184418B1 (en) | 2007-12-05 | 2007-12-05 | Method for producing white gold alloy and jewelry using this white gold alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP4184418B1 JP4184418B1 (en) | 2008-11-19 |
| JP2009138216A true JP2009138216A (en) | 2009-06-25 |
Family
ID=40148585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007314116A Expired - Fee Related JP4184418B1 (en) | 2007-12-05 | 2007-12-05 | Method for producing white gold alloy and jewelry using this white gold alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4184418B1 (en) |
-
2007
- 2007-12-05 JP JP2007314116A patent/JP4184418B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4184418B1 (en) | 2008-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Cretu et al. | Coloured gold alloys | |
| JP2019108614A (en) | Discoloration-resistant gold alloy | |
| US10471486B2 (en) | Method for fabrication of a gold alloy wire | |
| US20200308672A1 (en) | Sterling silver alloy and articles made from same | |
| US6841012B2 (en) | Anti-tarnish silver alloy | |
| JP2007520632A (en) | Platinum alloy and method for producing the same | |
| JP4058101B1 (en) | Decorative and dental gold alloys | |
| CN110791678A (en) | Copper-based joint coating alloy and preparation method thereof | |
| CN107164651B (en) | A kind of jewellery pink colour silver alloy and preparation method thereof | |
| RU2561562C1 (en) | Platinum alloy for jewellery and alloy manufacture method | |
| US9194024B1 (en) | Jewelry article of white precious metals and methods for making the same | |
| JP4184418B1 (en) | Method for producing white gold alloy and jewelry using this white gold alloy | |
| JP2017122249A (en) | Color gold alloy having enhanced processability and purity of 22 gold and manufacturing method therefor | |
| JP2009057625A (en) | White gold alloy, method for producing the same, and jewel using white gold alloy | |
| CN108624777A (en) | One kind having saturation rosiness and corrosion resistant cheap rose copper alloy | |
| JP2018090909A (en) | Palladium-based alloy | |
| KR102234078B1 (en) | Method for producing palladium-containing white gold alloy | |
| JP3389361B2 (en) | Decorative member and method of manufacturing the same | |
| RU2349660C1 (en) | Jewelry alloy on basis of palladium | |
| CH709923B1 (en) | Golden alloy. | |
| JP4435984B2 (en) | Jewelry composition | |
| CN108728685A (en) | Jewellery rub resistance high intensity has rose gold color and luster 14K rose silver alloy | |
| JP2024039783A (en) | SWEAT-RESISTANT Au ALLOY FOR JEWELRY AND METHOD FOR PRODUCING THE SAME | |
| RU2575526C2 (en) | Gold based alloy and method for its production | |
| RU2349659C1 (en) | Jewelry alloy of white color on basis of palladium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20080826 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20080903 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110912 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4184418 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120912 Year of fee payment: 4 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130912 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |