JPS61270349A - Ornamental platinum alloy - Google Patents
Ornamental platinum alloyInfo
- Publication number
- JPS61270349A JPS61270349A JP11358885A JP11358885A JPS61270349A JP S61270349 A JPS61270349 A JP S61270349A JP 11358885 A JP11358885 A JP 11358885A JP 11358885 A JP11358885 A JP 11358885A JP S61270349 A JPS61270349 A JP S61270349A
- Authority
- JP
- Japan
- Prior art keywords
- platinum alloy
- platinum
- ornamental
- alloy
- workability
- 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.)
- Pending
Links
Landscapes
- Adornments (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は指輪、ネックレス、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。[Detailed Description of the Invention] (Industrial Application Field) The present invention is applicable to rings, necklaces, brooches, tie pins,
This invention relates to the improvement of platinum alloys used as materials for cufflinks, watch frames, watch bands, lighters, writing utensils, eyeglass frames, earrings, etc.
（従来技術とその問題点）
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％）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言う欠点があった。(Prior art and its problems) Conventionally, platinum-palladium (5 to 15% by weight) alloys have been widely used as ornamental materials as described 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 have the disadvantage that the part that holds the jewel in place loosens and the jewel can fall off.
（発明の目的）
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
せんとするもである。(Object of the Invention) 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.
（発明の構成）
本発明による装飾用白金合金は、白金８４〜９６重量％
、ガリウム２〜１０重量％、クロム０．５〜１０重量％
よりなる時効硬化特性を具備したものである。(Structure of the Invention) The decorative platinum alloy according to the present invention has a platinum content of 84 to 96% by weight.
, gallium 2-10% by weight, chromium 0.5-10% by weight
This material has age hardening properties.
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６重量
％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った後、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２重■％未満では、硬さの改善が殆
んどなく１０重量％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。The reason why gallium is added to the decorative platinum alloy according to the present invention is that, as is clear from the Pt-Ga binary phase diagram, Ga has a maximum solid solution amount of 6% by weight at 1361°C with respect to pt. 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 2% by weight, there will be little improvement in hardness, and if it exceeds 10% by weight, pt and Ga will form an intermetallic compound, resulting in poor workability.
またクロムを添加した理由は、クロムは脱酸効果があり
、鋳造時に酸素濃度を抑制でき、鋳造性を向上させ、ま
た高温（例えばろう行中）での結晶粒の粗大化を防止し
て機械的強さの低下を防止する為であり、その添加量が
０．５重量％未満では硬さの改善が殆んどなく１０重全
量を超えると合金が硬くなりすぎ、加工性が悪くなるか
らである。The reason for adding chromium is that chromium has a deoxidizing effect, can suppress oxygen concentration during casting, improves castability, and prevents coarsening of crystal grains at high temperatures (for example, during soldering), making it easier to machine. This is to prevent a decrease in mechanical strength; if the amount added is less than 0.5% by weight, there will be little improvement in hardness, and if the total amount exceeds 10%, the alloy will become too hard and workability will deteriorate. It is.
（実施例）
以下、本発明による装飾用白金合金の効果を明瞭ならし
める為に実施例および従来例について述べる。(Examples) Examples and conventional examples will be described below in order to clarify the effects of the decorative platinum alloy according to the present invention.
第１表に示す成分組成の実施例阻１〜患５の装飾品用白
金合金と従来例１１ｈｌｌＬ２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、鋳造時の巣の発生度
合及び結晶粒の大きさについて測定したところ第２表の
ような結果を得た。The hardness after solution treatment, the hardness after aging, and the occurrence of cavities during casting of the platinum alloys for ornaments in Examples 1 to 5 and the platinum alloys for ornaments in Conventional Example 11HLLL2 with the component compositions shown in Table 1. When the degree and grain size were measured, the results shown in Table 2 were obtained.
（以下余白）
第 １ 表
第２表
上記表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
優れ、結晶粒が小さく、また鋳造した際の巣の発生度合
も低いことが判る。(Left below) Table 1 Table 2 As is clear from the above table, the platinum alloy for ornaments according to the present invention has superior hardness after aging treatment and smaller crystal grains than conventional platinum alloys for ornaments. It can also be seen that the degree of occurrence of cavities during casting is low.
（発明の効果）
以上詳記した通り本発明の装飾品用白金合金は、加工性
、機械的強さが極めて優れまた鋳造時の巣の発生度合が
低いので、従来の装飾品用白金合金にとって代わること
のできる画期的なものと言える。(Effects of the Invention) As detailed above, the platinum alloy for ornaments of the present invention has extremely excellent workability and mechanical strength, and has a low occurrence of cavities during casting, so it is superior to conventional platinum alloys for ornaments. It can be said to be an epoch-making product that can be replaced.
Claims (1)
０．５〜１０重量％よりなる装飾品用白金合金。A platinum alloy for ornaments consisting of 84 to 96% by weight of platinum, 2 to 10% by weight of gallium, and 0.5 to 10% by weight of chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11358885A JPS61270349A (en) | 1985-05-27 | 1985-05-27 | Ornamental platinum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11358885A JPS61270349A (en) | 1985-05-27 | 1985-05-27 | Ornamental platinum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61270349A true JPS61270349A (en) | 1986-11-29 |
Family
ID=14616020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11358885A Pending JPS61270349A (en) | 1985-05-27 | 1985-05-27 | Ornamental platinum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61270349A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4806515A (en) * | 1987-11-16 | 1989-02-21 | United Technologies Corporation | Ternary fuel cell catalyst containing platinum and gallium |
| US6562158B1 (en) | 1998-12-01 | 2003-05-13 | Steven Kretchmer | Heat-treatable platinum-gallium-palladium alloy for jewelry |
-
1985
- 1985-05-27 JP JP11358885A patent/JPS61270349A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4806515A (en) * | 1987-11-16 | 1989-02-21 | United Technologies Corporation | Ternary fuel cell catalyst containing platinum and gallium |
| US6562158B1 (en) | 1998-12-01 | 2003-05-13 | Steven Kretchmer | Heat-treatable platinum-gallium-palladium alloy for jewelry |
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