JPH0143825B2 - - Google Patents
Info
- Publication number
- JPH0143825B2 JPH0143825B2 JP56094975A JP9497581A JPH0143825B2 JP H0143825 B2 JPH0143825 B2 JP H0143825B2 JP 56094975 A JP56094975 A JP 56094975A JP 9497581 A JP9497581 A JP 9497581A JP H0143825 B2 JPH0143825 B2 JP H0143825B2
- Authority
- JP
- Japan
- Prior art keywords
- platinum
- ornaments
- weight
- indium
- gallium
- 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
Links
- 229910001260 Pt alloy Inorganic materials 0.000 claims description 13
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 13
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 7
- 229910052733 gallium Inorganic materials 0.000 claims description 7
- 229910052738 indium Inorganic materials 0.000 claims description 7
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 6
- 238000003483 aging Methods 0.000 claims description 6
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 6
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- 239000010948 rhodium Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052707 ruthenium Inorganic materials 0.000 claims description 3
- 210000004243 sweat Anatomy 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010437 gem Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000846 In alloy Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Description
本発明は指輪、ネツクレス、ブローチ、ネクタ
イピン、カフスボタン、時計枠、時計バンド、ラ
イター、筆記用具、眼鏡枠、イヤリング等の材料
として使用する白金合金の改良に関するものであ
る。
従来、上述の如き装飾品材料としては白金−パ
ラジウム（５〜15重量％（以下「ｗ／ｏ」とす
る。））系合金が多用されている。この合金は、加
工性、鋳造性に優れているが、機械的強さ特に硬
さが低い為、研摩中にすり傷、押傷が付き易く且
つ光沢が出にくくまた完成品として使用している
場合も傷が付き易くまた宝石付指輪の場合、宝石
を止めている部分がゆるんで宝石が脱落するとい
う欠点があつた。
本発明は上記の欠点を解消せんが為になされた
ものであり、機械的強さ、加工性に優れた装飾用
白金合金を提供せんとするものである。
本発明による時効硬化性装飾用白金合金の１つ
は、ガリウム３〜10w／ｏ、インジウム３〜
10w／ｏ及び残部白金よりなる時効硬化特性を具
備したものであり、もう１つは白金84〜94w／
ｏ、ガリウム３〜10w／ｏ、インジウム３〜
10w／ｏ、パラジウム、ロジウム、イリジウム、
ルテニウムのうち少なくとも一種が２〜5w／ｏ
で合計で２〜5w／ｏ及び残部白金よりなる時効
硬化特性を具備したものである。
本発明による装飾用白金合金に於いて、ガリウ
ムを添加した理由は、Pt−Gaの２元状態図から
も明らかなようにGaはPtに対して1361℃で最大
固溶量6w／ｏを示し、その固溶限は温度下降と
共に漸次減少し固溶体領域まで加熱し、急冷する
溶体化処理を行つた後、適当な温度で時効させる
と著しい時効硬化性を現わす為である。その添加
量が3w／ｏ未満では、硬さの改善が殆んどなく
10w／ｏを超えるとPtとGaが金属間化合物を作
り、加工性が悪くなるからである。
またインジウムを添加した理由は、Pt−In合金
は固溶体領域まで加熱し急冷する溶体化処理を行
つた後、適当な温度で時効させると著しい時効硬
化性を現わす為である。その添加量が3w／ｏ未
満では硬さの改善が殆んどなく10w／ｏを超える
とPtとInが金属間化合物を作り、加工性が悪くな
るからである。また、パラジウム、ロジウム、イ
リジウム、ルテニウムのうち少なくとも１種を添
加した理由は、これらの元素はいずれもガリウ
ム、インジウムの添加による耐食性の低下を防止
するためで、その及ぼす効果には変わりがないが
2w／ｏ以下ではその耐食性に効果がなく5w／ｏ
を越えると時効硬化性を妨げるからである。
以下、本発明による装飾用白金合金の効果を明
瞭ならしめる為に実施例及び従来例について述べ
る。
第１表に示す成分組成の実施例No.１〜No.17の装
飾品用白金合金と比較例No.18、従来例No.19、No.20
の装飾品用白金合金の溶体化処理後の硬度、時効
後の硬度、耐汗性について測定したところ第２表
のような結果を得た。
The present invention relates to improvements in platinum alloys used as materials for rings, necklaces, brooches, tie pins, cufflinks, watch frames, watch bands, lighters, writing utensils, eyeglass frames, earrings, and the like. Conventionally, platinum-palladium (5 to 15% by weight (hereinafter referred to as "w/o")) alloys have been widely used as materials for decorative items such as those mentioned above. This alloy has excellent workability and castability, but because of its low mechanical strength and particularly low hardness, it is easily scratched and stamped during polishing, and is difficult to produce gloss, and is used as a finished product. Rings with jewels also had the disadvantage that the part that held the jewels in place loosened and the jewels fell off. The present invention has been made to solve the above-mentioned drawbacks, and aims to provide a decorative platinum alloy with excellent mechanical strength and workability. One of the age hardenable decorative platinum alloys according to the present invention includes 3 to 10 w/o of gallium and 3 to 10 w/o of indium.
One with age hardening properties consists of 10w/o and the balance is platinum, and the other is platinum 84~94w/o.
o, gallium 3~10w/o, indium 3~
10w/o, palladium, rhodium, iridium,
At least one type of ruthenium is 2~5w/o
It has age hardening characteristics of 2 to 5 w/o in total and the balance being platinum. The reason for adding gallium to the decorative platinum alloy according to the present invention is that, as is clear from the Pt-Ga binary phase diagram, Ga exhibits a maximum solid solution amount of 6 w/o relative to Pt at 1361°C. This is because its solid solubility limit gradually decreases as the temperature decreases, and when it is aged at an appropriate temperature after being subjected to solution treatment in which it is heated to a solid solution region and rapidly cooled, it exhibits remarkable age hardening properties. If the amount added is less than 3w/o, there is almost no improvement in hardness.
This is because if it exceeds 10 w/o, Pt and Ga will form an intermetallic compound, resulting in poor workability. The reason why indium is added is that Pt-In alloy exhibits remarkable age hardening properties when it is aged at an appropriate temperature after being subjected to solution treatment in which it is heated to a solid solution region and rapidly cooled. This is because if the amount added is less than 3 w/o, there is little improvement in hardness, and if it exceeds 10 w/o, Pt and In will form an intermetallic compound, resulting in poor workability. Furthermore, the reason for adding at least one of palladium, rhodium, iridium, and ruthenium is that these elements prevent the corrosion resistance from deteriorating due to the addition of gallium and indium, and their effects remain the same.
Below 2w/o, it has no effect on corrosion resistance and 5w/o
This is because if it exceeds this, age hardening properties will be hindered. Examples and conventional examples will be described below in order to clarify the effects of the decorative platinum alloy according to the present invention. Platinum alloys for ornaments of Examples No. 1 to No. 17 with the composition shown in Table 1, Comparative Example No. 18, Conventional Example No. 19, No. 20
The hardness after solution treatment, the hardness after aging, and the sweat resistance of the platinum alloy for ornaments were measured, and the results shown in Table 2 were obtained.
【表】【table】
【表】【table】
【表】
なお人工汗試験はNH4Cl15.5ｇ／、NaCl20
ｇ／、酢酸2.5ｇ／、尿素５ｇ／、乳酸15
ｇ／、PH4.7の液組成で液温40℃、240時間浸漬
後判定した。
上記で明らかなように本発明による装飾品用白
金合金は、従来の装飾品用白金合金に比し時効処
理後の硬さが著しく優れ、耐汗性についても同等
に優れていることが判る。
以上詳記した通り、本発明の装飾品用白金合金
は加工性、機械的強さ、耐汗性が極めて優れてい
るので、従来の装飾品用白金合金にとつて代わる
ことのできる画期的なものと言える。[Table] The artificial sweat test was performed using NH 4 Cl15.5g/, NaCl20
g/, acetic acid 2.5g/, urea 5g/, lactic acid 15
Judgment was made after immersion for 240 hours at a liquid temperature of 40°C with a liquid composition of 1.5 g/g/, pH 4.7. As is clear from the above, the platinum alloy for ornaments according to the present invention has significantly superior hardness after aging treatment and is equally excellent in sweat resistance compared to conventional platinum alloys for ornaments. As detailed above, the platinum alloy for ornaments of the present invention has extremely excellent workability, mechanical strength, and sweat resistance, so it is an epoch-making material that can replace conventional platinum alloys for ornaments. It can be said that it is a thing.
Claims (1)
％及び残部白金よりなる時効硬化性を有する装飾
品用白金合金。 ２ ガリウム３〜10重量％インジウム３〜10重量
％、パラジウム、ロジウム、イリジウム、ルテニ
ウムのうち少なくとも一種が２〜５％で合計で２
〜５重量％及び残部白金より成る時効硬化性を有
する装飾品用白金合金。[Scope of Claims] 1. A platinum alloy for ornaments having age hardenability, consisting of 3 to 10% by weight of gallium, 3 to 10% by weight of indium, and the balance being platinum. 2 3 to 10% by weight of gallium, 3 to 10% by weight of indium, 2 to 5% of at least one of palladium, rhodium, iridium, and ruthenium, for a total of 2%
A platinum alloy for ornaments having age hardening properties and consisting of ~5% by weight and the balance being platinum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9497581A JPS57210936A (en) | 1981-06-19 | 1981-06-19 | Platinum alloy for accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9497581A JPS57210936A (en) | 1981-06-19 | 1981-06-19 | Platinum alloy for accessory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57210936A JPS57210936A (en) | 1982-12-24 |
| JPH0143825B2 true JPH0143825B2 (en) | 1989-09-22 |
Family
ID=14124907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9497581A Granted JPS57210936A (en) | 1981-06-19 | 1981-06-19 | Platinum alloy for accessory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57210936A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8801532D0 (en) * | 1988-01-23 | 1988-02-24 | Cook P | Alloy |
| US6562158B1 (en) | 1998-12-01 | 2003-05-13 | Steven Kretchmer | Heat-treatable platinum-gallium-palladium alloy for jewelry |
| JP4426406B2 (en) * | 2004-09-03 | 2010-03-03 | 株式会社徳力本店 | Pt alloy for decoration |
| WO2016208091A1 (en) * | 2015-06-25 | 2016-12-29 | 株式会社工房グリーム | Pt ALLOY FOR JEWELRY |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5080493A (en) * | 1973-11-22 | 1975-06-30 |
-
1981
- 1981-06-19 JP JP9497581A patent/JPS57210936A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5080493A (en) * | 1973-11-22 | 1975-06-30 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57210936A (en) | 1982-12-24 |
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