WO2016151839A1 - Silver alloy and silver alloy accessory - Google Patents
Silver alloy and silver alloy accessory Download PDFInfo
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- WO2016151839A1 WO2016151839A1 PCT/JP2015/059369 JP2015059369W WO2016151839A1 WO 2016151839 A1 WO2016151839 A1 WO 2016151839A1 JP 2015059369 W JP2015059369 W JP 2015059369W WO 2016151839 A1 WO2016151839 A1 WO 2016151839A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
Definitions
- the present invention mainly relates to a silver alloy and a silver alloy ornament used as a decoration material.
- Silver or silver alloy has long been used as a precious metal material for ornaments, and the silver alloy ornaments range from rings, pendants, necklaces, and earrings. *
- Silver, silver alloy, and silver alloy ornaments as described above easily react in a highly corrosive reducing atmosphere because of the material characteristics of silver. Further, it is gradually influenced by a small amount of sulfur gas or sulfurous acid gas in the air, and the black film of silver sulfide is refined on the surface, thereby reducing the value as a silver alloy decorative product. Under these circumstances, in order to prevent discoloration, sulfidation resistance is ensured by silver alloy decorations with organic coatings, metal plating such as rhodium, or alloying with sulfidation resistance improving elements such as palladium and platinum. The improvement of sex.
- the present invention has been made in view of the above problems, and is made of a silver alloy or a silver alloy that is resistant to discoloration and can maintain the aesthetic appearance of a decorative article for a long period of time by combining scratch resistance and sulfidation resistance. To provide decorations.
- the silver alloy of the present invention is characterized by containing 3.0 to 10.0 wt% of germanium mainly composed of silver.
- the silver alloy may be hardened by heat-treating a silver alloy containing silver as a main component and containing 3.0 to 10.0 wt% of germanium at a temperature of about 200 to 650 ° C.
- the heat treatment of the silver alloy can be performed within a range of 10 minutes to 10 hours.
- the silver alloy ornament is formed using the above silver alloy.
- the silver alloy and the silver alloy ornament of the present invention it is possible to improve scratch resistance and sulfidation resistance by containing 3.0 to 10.0 wt% of germanium with respect to silver. This eliminates the need for organic coating treatment and metal plating on the surface of the decorative article, and addition of expensive noble metal elements such as palladium and platinum to the silver, thereby reducing the manufacturing cost.
- the silver alloy and the silver alloy ornaments are hardened by heat treatment in the range of 200 ° C. to 650 ° C., thereby increasing the hardness of the silver alloy.
- silver alloy and silver alloy ornaments have a temperature lower than 651 ° C, which is the eutectic temperature of silver and germanium, by performing heat treatment within a range of 10 minutes to 10 hours, and hardening of the silver alloy. Can be processed at temperatures above 200 ° C.
- the silver alloy according to the present embodiment is manufactured by the following composition, heat treatment, and processing method for decorative products.
- the composition of the silver alloy according to the present implementation is set to be a composition range composed of a binary alloy of silver (Ag) -germanium (Ge) and containing 3.0 to 10.0 wt% of germanium mainly composed of silver.
- the germanium content is set in the range of 3.0 to 10.0 wt%. If 1.0 wt% or more is added, an effect of sulfidation resistance can be obtained, but if it is 3.0 wt% or less, the hardness of the silver alloy is lowered. Furthermore, since hardening by heat treatment cannot be obtained, 3.0 wt% or more is necessary. Further, if the germanium content is added more than 10.0 wt%, the purity of silver in the alloy is lowered, so the value as a decorative product is lowered and the marketability is lost.
- the heat treatment temperature of the silver alloy is set to 650 ° C. or lower. Therefore, referring to the Ag-Ge system phase diagram shown in FIG. 1, since the eutectic temperature is 651 ° C., if the temperature is higher than that, the melting of the alloy starts, so heat treatment can be performed for 10 minutes. The processing time needs to be 650 ° C. or less. And the heat treatment temperature was set to 200 ° C. or higher in this embodiment because the precipitation efficiency of Ge solid solution in Ag solid solution is low at 100 ° C., and the effect of heat treatment of the silver alloy cannot be obtained. The processing time was within 10 hours.
- the production method when a silver alloy is used as a decoration material is processed into a decorative member such as a ring, a pendant, a necklace, and a pierced earring by obtaining a casting method such as a lost wax method.
- the silver alloy according to this embodiment was measured for heat treatment time and hardness with a Vickers hardness tester in a test facility based on JIS standards (Vickers hardness test based on JIS Z 2244: 2009).
- the results of heat treatment at 400 ° C. for 5 hours are shown for any composition.
- 60Hv or more was rated as ⁇ , and the hardness less than 60Hv was marked as x.
- 100Hv or more was evaluated as ⁇ , and the hardness less than 100Hv was evaluated as ⁇ .
- the Vickers hardness is 60 Hv or more, it has a hardness that can be practically used as a decorative product, but if it is 100 Hv or more, the commercial value is further increased.
- the silver alloy formed as described above has a certain scratch resistance to be used as a decorative product, and further, discoloration under a sulfurized atmosphere can be suppressed, so that it is a decorative material that does not impair the appearance for a long time, or made of a silver alloy. Can be provided as a decoration.
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Abstract
The purpose of the present invention is to provide a silver alloy and a silver alloy accessory which are endowed with both scratch resistance and sulfidation resistance and therefore do not readily discolor, so that the appearance of the accessory can be maintained for an extended period. The silver alloy is characterized by having silver as the principal component and containing 3.0-10.0 wt% of germanium.
Description
本発明は、おもに装飾品の材料として使用する銀合金および銀合金製装飾品に関するものである。
The present invention mainly relates to a silver alloy and a silver alloy ornament used as a decoration material.
銀または銀合金は、古くから装飾品の貴金属材料として使用されており、その銀合金製装飾品については指輪、ペンダント、ネックレス、ピアス等の多岐にわたっている。
Silver or silver alloy has long been used as a precious metal material for ornaments, and the silver alloy ornaments range from rings, pendants, necklaces, and earrings. *
上記のような銀あるいは銀合金、銀合金装飾品は、銀の材料特性上、腐食性の強い還元雰囲気においては容易に反応する。さらに、空気中の微量な硫化ガスや亜硫酸ガスなどによっても次第に影響され、その表面に硫化銀の黒色皮膜を精製し、銀合金製装飾品としての価値を低下させてしまう。このような事情から、変色を防止するために、銀合金製装飾品に対して有機物系皮膜コーティング、ロジウム等の金属めっき、またはパラジウムやプラチナといった耐硫化性改善元素との合金化により、耐硫化性の向上をしている。ところが、上記工程および添加元素にあっては、工数の増加や添加元素が高価なことから、銀合金製装飾品の製造原価が上がる問題点があった。また、装飾品材料として使用される銀合金は、一般的な装飾品としての美観を損なわないように、一定の耐傷性が求められるものであるが、銀については、金属の中でも金に次いで延性と展性を有している反面、非常に柔らかく耐傷性が乏しいものであった。このことから、銀に対して銅を約7.5重量％程度含有することにより、一般にスターリングシルバーと呼ばれる合金の硬度を高めて耐傷性を改善したものが登場している。しかしながら、上記のスターリングシルバー等に代表される多くの銀合金は、銀の耐傷性を改善した反面、耐硫化性に乏しく、何らかの変色防止の手段を施さなければ変色しやすいままであり、銀合金製装飾品としての美観の長期的な維持が難しいものであった。
Silver, silver alloy, and silver alloy ornaments as described above easily react in a highly corrosive reducing atmosphere because of the material characteristics of silver. Further, it is gradually influenced by a small amount of sulfur gas or sulfurous acid gas in the air, and the black film of silver sulfide is refined on the surface, thereby reducing the value as a silver alloy decorative product. Under these circumstances, in order to prevent discoloration, sulfidation resistance is ensured by silver alloy decorations with organic coatings, metal plating such as rhodium, or alloying with sulfidation resistance improving elements such as palladium and platinum. The improvement of sex. However, the above-described steps and additive elements have a problem that the manufacturing cost of the silver alloy decorative article increases because of the increase in the number of man-hours and the expensive additive elements. In addition, silver alloys used as ornamental materials are required to have a certain level of scratch resistance so as not to impair the beauty of general ornamental items. Although it has malleability, it was very soft and poor in scratch resistance. For this reason, an alloy that is improved in scratch resistance by increasing the hardness of an alloy generally called sterling silver has appeared by containing about 7.5% by weight of copper with respect to silver. However, many silver alloys represented by the above sterling silver, etc. have improved the scratch resistance of silver, but are poor in sulfidation resistance and remain easily discolored without any discoloration prevention measures. It was difficult to maintain the beauty as a decorative product for a long time.
本発明は、上記課題を鑑みてなされたものであり、耐傷性と耐硫化性を兼備することで、変色がしにくく装飾品の美観を長期的に維持することのできる銀合金または銀合金製装飾品を提供することにある。
The present invention has been made in view of the above problems, and is made of a silver alloy or a silver alloy that is resistant to discoloration and can maintain the aesthetic appearance of a decorative article for a long period of time by combining scratch resistance and sulfidation resistance. To provide decorations.
本発明の銀合金は、銀を主成分として、ゲルマニウムを3.0～10.0wt%含有したことを特徴とする。
The silver alloy of the present invention is characterized by containing 3.0 to 10.0 wt% of germanium mainly composed of silver.
銀合金は、銀を主成分として、ゲルマニウムを3.0～10.0wt%含有した銀合金を約200～650℃の温度で熱処理することによって硬化させてもよい。
The silver alloy may be hardened by heat-treating a silver alloy containing silver as a main component and containing 3.0 to 10.0 wt% of germanium at a temperature of about 200 to 650 ° C.
銀合金の熱処理は、10分～10時間の範囲内で行うことができる。
The heat treatment of the silver alloy can be performed within a range of 10 minutes to 10 hours.
銀合金製装飾品は、上記の銀合金を使用して形成する。
The silver alloy ornament is formed using the above silver alloy.
本発明の銀合金および銀合金製装飾品によれば、銀に対してゲルマニウムを3.0～10.0wt%含有することにより、耐傷性と耐硫化性の向上を図ることができる。これにより、装飾品表面に対する有機物系コーティング処理や金属めっき、さらに、銀に対してパラジウムやプラチナ等の高価な貴金属元素の添加が不要となり、製造コストの低減を図れるようになる。
According to the silver alloy and the silver alloy ornament of the present invention, it is possible to improve scratch resistance and sulfidation resistance by containing 3.0 to 10.0 wt% of germanium with respect to silver. This eliminates the need for organic coating treatment and metal plating on the surface of the decorative article, and addition of expensive noble metal elements such as palladium and platinum to the silver, thereby reducing the manufacturing cost.
また、銀合金および銀合金製装飾品は、200℃～650℃の範囲内での熱処理による高硬度化を施すことにより、銀合金の硬度が高まる。これにより、耐傷性と変色に強い耐硫化性を兼ね備える銀合金製装飾品を提供できる。
In addition, the silver alloy and the silver alloy ornaments are hardened by heat treatment in the range of 200 ° C. to 650 ° C., thereby increasing the hardness of the silver alloy. Thereby, it is possible to provide a silver alloy ornament having both scratch resistance and resistance to sulfidation.
また、銀合金および銀合金製装飾品は、熱処理を10分～10時間の範囲内で行うことにより、銀とゲルマニウムの共晶温度である651℃よりも低い温度であると共に、銀合金の硬化が期待できる200℃以上の温度で処理が可能となる。
In addition, silver alloy and silver alloy ornaments have a temperature lower than 651 ° C, which is the eutectic temperature of silver and germanium, by performing heat treatment within a range of 10 minutes to 10 hours, and hardening of the silver alloy. Can be processed at temperatures above 200 ° C.
以下に、図面と表に基づいて本実施による銀合金と銀合金製装飾品について説明する。
本実施による銀合金は、以下に示す組成、熱処理、装飾品の加工方法によって製造される。 Below, based on drawing and a table | surface, the silver alloy and silver alloy decoration by this implementation are demonstrated.
The silver alloy according to the present embodiment is manufactured by the following composition, heat treatment, and processing method for decorative products.
本実施による銀合金は、以下に示す組成、熱処理、装飾品の加工方法によって製造される。 Below, based on drawing and a table | surface, the silver alloy and silver alloy decoration by this implementation are demonstrated.
The silver alloy according to the present embodiment is manufactured by the following composition, heat treatment, and processing method for decorative products.
本実施による銀合金の組成については、銀（Ag）－ゲルマニウム（Ge）の二元系合金で構成され、銀を主成分として、ゲルマニウムを3.0～10.0wt％添加した組成範囲となるように設定する。このうち、ゲルマニウムの含有量は、3.0～10.0wt％の範囲に設定してある。これは、1.0wt％以上添加すれば耐硫化性の効果を得られるが、3.0wt％以下であると銀合金の硬度が低くなる。さらに、熱処理による硬化が得られないため、3.0wt％以上必要となる。また、ゲルマニウムの含有量を10.0wt％より多く添加すると、合金中の銀の純度が低下することから、装飾品としての価値が低下して市場性を失うことになる。
The composition of the silver alloy according to the present implementation is set to be a composition range composed of a binary alloy of silver (Ag) -germanium (Ge) and containing 3.0 to 10.0 wt% of germanium mainly composed of silver. To do. Of these, the germanium content is set in the range of 3.0 to 10.0 wt%. If 1.0 wt% or more is added, an effect of sulfidation resistance can be obtained, but if it is 3.0 wt% or less, the hardness of the silver alloy is lowered. Furthermore, since hardening by heat treatment cannot be obtained, 3.0 wt% or more is necessary. Further, if the germanium content is added more than 10.0 wt%, the purity of silver in the alloy is lowered, so the value as a decorative product is lowered and the marketability is lost.
銀合金の熱処理温度については、650℃以下に設定するものである。そこで図１に示すAg－Ge系状態図を参照すれば、共晶温度が651℃となっていることから、それ以上の温度にすると、合金の溶解が始まるため、熱処理が可能な10分の処理時間で650℃以下である必要がある。そして、本実施で熱処理温度を200℃以上に設定したのは、Ag固溶体中へのGe固溶体の析出効率が100℃では低く、銀合金の熱処理による効果が得られないことから、200℃以上とすることで10時間以内の処理時間とした。
The heat treatment temperature of the silver alloy is set to 650 ° C. or lower. Therefore, referring to the Ag-Ge system phase diagram shown in FIG. 1, since the eutectic temperature is 651 ° C., if the temperature is higher than that, the melting of the alloy starts, so heat treatment can be performed for 10 minutes. The processing time needs to be 650 ° C. or less. And the heat treatment temperature was set to 200 ° C. or higher in this embodiment because the precipitation efficiency of Ge solid solution in Ag solid solution is low at 100 ° C., and the effect of heat treatment of the silver alloy cannot be obtained. The processing time was within 10 hours.
銀合金を装飾品材料とするときの作成方法は、ロストワックス法等の鋳造方法を得て、指輪、ペンダント、ネックレス、ピアスなどの装飾部材に加工される。
The production method when a silver alloy is used as a decoration material is processed into a decorative member such as a ring, a pendant, a necklace, and a pierced earring by obtaining a casting method such as a lost wax method.
以下に、上記の実施により生成された銀合金の評価結果を記す。
銀、ゲルマニウムの添加量を種々変更して、色、耐食性、熱処理前の硬度および熱処理後の硬度を調べた。その結果を表1に示す。
また、Ag（96重量％）－Ge（4重量％）の銀合金を100℃刻みで5時間熱処理した際の各種温度の硬度を調べた。その結果を図２に示す。 Below, the evaluation result of the silver alloy produced | generated by said implementation is described.
Various addition amounts of silver and germanium were changed, and the color, corrosion resistance, hardness before heat treatment, and hardness after heat treatment were examined. The results are shown in Table 1.
Further, the hardness at various temperatures was examined when a silver alloy of Ag (96 wt%)-Ge (4 wt%) was heat-treated at 100 ° C. for 5 hours. The result is shown in FIG.
銀、ゲルマニウムの添加量を種々変更して、色、耐食性、熱処理前の硬度および熱処理後の硬度を調べた。その結果を表1に示す。
また、Ag（96重量％）－Ge（4重量％）の銀合金を100℃刻みで5時間熱処理した際の各種温度の硬度を調べた。その結果を図２に示す。 Below, the evaluation result of the silver alloy produced | generated by said implementation is described.
Various addition amounts of silver and germanium were changed, and the color, corrosion resistance, hardness before heat treatment, and hardness after heat treatment were examined. The results are shown in Table 1.
Further, the hardness at various temperatures was examined when a silver alloy of Ag (96 wt%)-Ge (4 wt%) was heat-treated at 100 ° C. for 5 hours. The result is shown in FIG.
次に上記の各工程を経て得られた銀合金により形成した装飾品について、下記に示す各テストを施した。
Next, the following tests were performed on the ornaments formed from the silver alloy obtained through the above-described steps.
「銀合金の色について」
この地金をバフ研磨した後に、基準として銀に対して銅を7.5重量％含有するスターリングシルバーと比較し、白色の発色があるか否かを肉眼で評価した。そして、上記のスターリングシルバーと比較し、スターリングシルバーに近い白の発色があったものには○印を、また白以外に発色があったものは×印を付した。 "About the color of silver alloys"
After buffing this bare metal, it was evaluated with the naked eye whether or not there was a white color compared with sterling silver containing 7.5% by weight of copper with respect to silver as a reference. Then, in comparison with the above sterling silver, those with white coloration similar to sterling silver were marked with ◯, and those with color other than white were marked with x.
この地金をバフ研磨した後に、基準として銀に対して銅を7.5重量％含有するスターリングシルバーと比較し、白色の発色があるか否かを肉眼で評価した。そして、上記のスターリングシルバーと比較し、スターリングシルバーに近い白の発色があったものには○印を、また白以外に発色があったものは×印を付した。 "About the color of silver alloys"
After buffing this bare metal, it was evaluated with the naked eye whether or not there was a white color compared with sterling silver containing 7.5% by weight of copper with respect to silver as a reference. Then, in comparison with the above sterling silver, those with white coloration similar to sterling silver were marked with ◯, and those with color other than white were marked with x.
「銀合金の耐食性について」
本実施による銀合金の地金をバフ研磨した後に、JIS規格（JIS B 7285 耐汗性試験）に基づいて試験を行った。具体的に人工汗溶液に1hr浸し、変色の有無を肉眼で調べて評価したものである。そして、スターリングシルバーと比較して黒色化が少ないものには○印を、黒色化が同等であったものには×印を付した。 "Corrosion resistance of silver alloys"
After the silver alloy ingot according to the present embodiment was buffed, the test was performed based on JIS standard (JIS B 7285 sweat resistance test). Specifically, it was evaluated by immersing in an artificial sweat solution for 1 hour and examining the presence or absence of discoloration with the naked eye. A mark with a small blackening compared to sterling silver was marked with a circle, and a mark with blackening was marked with a cross.
本実施による銀合金の地金をバフ研磨した後に、JIS規格（JIS B 7285 耐汗性試験）に基づいて試験を行った。具体的に人工汗溶液に1hr浸し、変色の有無を肉眼で調べて評価したものである。そして、スターリングシルバーと比較して黒色化が少ないものには○印を、黒色化が同等であったものには×印を付した。 "Corrosion resistance of silver alloys"
After the silver alloy ingot according to the present embodiment was buffed, the test was performed based on JIS standard (JIS B 7285 sweat resistance test). Specifically, it was evaluated by immersing in an artificial sweat solution for 1 hour and examining the presence or absence of discoloration with the naked eye. A mark with a small blackening compared to sterling silver was marked with a circle, and a mark with blackening was marked with a cross.
「銀合金の硬度について」
本実施による銀合金についてJIS規格（JIS Z 2244:2009に基づくビッカース硬さ試験）に基づく試験設備において、ビッカース硬度計により熱処理時間と硬度を測定した。
熱処理後の硬度については、いずれの組成においても400℃で5時間の熱処理を行った結果を示している。また、熱処理前の硬度については、60Hv以上を○とし、60Hvに満たないものは×とした。さらに、熱処理後の硬度については、100Hv以上を○とし、100Hvに満たないものは×とした。この中でビッカース硬度が60Hv以上であれば、装飾品として実用に耐え得る硬度を有することになるが、100Hv以上であれば、さらに商品価値が高まる。 "About the hardness of silver alloys"
The silver alloy according to this embodiment was measured for heat treatment time and hardness with a Vickers hardness tester in a test facility based on JIS standards (Vickers hardness test based on JIS Z 2244: 2009).
Regarding the hardness after heat treatment, the results of heat treatment at 400 ° C. for 5 hours are shown for any composition. Regarding the hardness before the heat treatment, 60Hv or more was rated as ◯, and the hardness less than 60Hv was marked as x. Further, regarding the hardness after the heat treatment, 100Hv or more was evaluated as ◯, and the hardness less than 100Hv was evaluated as ×. Among these, if the Vickers hardness is 60 Hv or more, it has a hardness that can be practically used as a decorative product, but if it is 100 Hv or more, the commercial value is further increased.
本実施による銀合金についてJIS規格（JIS Z 2244:2009に基づくビッカース硬さ試験）に基づく試験設備において、ビッカース硬度計により熱処理時間と硬度を測定した。
熱処理後の硬度については、いずれの組成においても400℃で5時間の熱処理を行った結果を示している。また、熱処理前の硬度については、60Hv以上を○とし、60Hvに満たないものは×とした。さらに、熱処理後の硬度については、100Hv以上を○とし、100Hvに満たないものは×とした。この中でビッカース硬度が60Hv以上であれば、装飾品として実用に耐え得る硬度を有することになるが、100Hv以上であれば、さらに商品価値が高まる。 "About the hardness of silver alloys"
The silver alloy according to this embodiment was measured for heat treatment time and hardness with a Vickers hardness tester in a test facility based on JIS standards (Vickers hardness test based on JIS Z 2244: 2009).
Regarding the hardness after heat treatment, the results of heat treatment at 400 ° C. for 5 hours are shown for any composition. Regarding the hardness before the heat treatment, 60Hv or more was rated as ◯, and the hardness less than 60Hv was marked as x. Further, regarding the hardness after the heat treatment, 100Hv or more was evaluated as ◯, and the hardness less than 100Hv was evaluated as ×. Among these, if the Vickers hardness is 60 Hv or more, it has a hardness that can be practically used as a decorative product, but if it is 100 Hv or more, the commercial value is further increased.
上記のように形成した銀合金は、装飾品として使用する一定の耐傷性を有し、さらに、硫化雰囲気下における変色も抑えられることから、長期間美観を損ねない装飾品材料、または銀合金製装飾品として提供できる。
The silver alloy formed as described above has a certain scratch resistance to be used as a decorative product, and further, discoloration under a sulfurized atmosphere can be suppressed, so that it is a decorative material that does not impair the appearance for a long time, or made of a silver alloy. Can be provided as a decoration.
Claims (4)
- 銀を主成分として、ゲルマニウムを3.0～10.0wt%含有したことを特徴とする銀合金。 Silver alloy characterized by containing 3.0 to 10.0 wt% germanium with silver as the main component.
- 銀を主成分として、ゲルマニウムを3.0～10.0wt%含有した銀合金を約200～650℃の温度で熱処理したことを特徴とする請求項１記載の銀合金。 The silver alloy according to claim 1, wherein a silver alloy containing silver as a main component and containing 3.0 to 10.0 wt% of germanium is heat-treated at a temperature of about 200 to 650 ° C.
- 熱処理は、10分～10時間の範囲内で行うことを特徴とする請求項２記載の銀合金。 3. The silver alloy according to claim 2, wherein the heat treatment is performed within a range of 10 minutes to 10 hours.
- 請求項１、２または３記載の銀合金を使用することを特徴とする銀合金製装飾品。 A silver alloy ornament using the silver alloy according to claim 1, 2 or 3.
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| PCT/JP2015/059369 WO2016151839A1 (en) | 2015-03-26 | 2015-03-26 | Silver alloy and silver alloy accessory |
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| PCT/JP2015/059369 WO2016151839A1 (en) | 2015-03-26 | 2015-03-26 | Silver alloy and silver alloy accessory |
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| JPS6029434A (en) * | 1983-07-27 | 1985-02-14 | Kyocera Corp | Brazing filler metal |
| JPS6220850A (en) * | 1985-07-19 | 1987-01-29 | Citizen Watch Co Ltd | Tarnish resistant silver alloy |
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