JPS6137342B2 - - Google Patents
Info
- Publication number
- JPS6137342B2 JPS6137342B2 JP16218778A JP16218778A JPS6137342B2 JP S6137342 B2 JPS6137342 B2 JP S6137342B2 JP 16218778 A JP16218778 A JP 16218778A JP 16218778 A JP16218778 A JP 16218778A JP S6137342 B2 JPS6137342 B2 JP S6137342B2
- Authority
- JP
- Japan
- Prior art keywords
- platinum
- processing
- mechanical strength
- present
- alloy
- 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 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- 239000013078 crystal Substances 0.000 description 6
- 239000010437 gem Substances 0.000 description 3
- 229910001252 Pd alloy Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Landscapes
- Adornments (AREA)
Description
本発明は、塑性加工にて作る指輪、ネツクレ
ス、ネクタイピン、時計枠、時計バンド、ライタ
ー、眼鏡枠、筆記具、イヤリング等の加工用材料
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、塑性加工にて作る指輪、ネツクレス、ネ
クタイピン、時計枠、時計バンド、ライター、眼
鏡枠、筆記具、イヤリング等の加工用材料として
は、白金−パラジウム合金が多く使用されている
が、この白金−パラジウム合金は塑性加工性には
優れているが、機懐的強さ特に硬さが低い為、塑
性加工後の研摩中にすり傷、押傷が付き易く且つ
金属光沢が出にくく、また完成品として使用して
いる場合も傷が付き易く、さらに宝石付指輪の場
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、かかる欠点を解消すべくなされたも
のであり、機械的強さ及び塑性加工性に優れた装
飾品加工用白金合金を提供せんとするものであ
る。
本発明による装飾品加工用白金合金の１つは、
コバルト１〜15w/o、残部白金より成るものであ
り、他の１つはコバルト１〜15w/o、イツトリウ
ム0.01〜３w/o、残部白金より成るものである。
本発明による装飾品加工用白金合金に於いて、
白金にコバルトを添加した理由は、機械的強さを
向上させる為であり、その添加量を１〜15w/oと
限定したのは、１w/o未満では機械的強さが不十
分であり、15w/oを越えると塑性加工性が著しく
低下するからである。
またイツトリウムを添加したのは、高温（例え
ばろう付中）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
0.01w/o未満では高温での結晶粒の粗大化を防止
することができず、機械的強さが低下してしま
い、３w/oを越えるとそれ以上添加しても結晶粒
の粗大化防止の向上が見られないからである。
以下本発明による装飾品加工用白金合金の効果
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。
下表の左欄に示す成分組成の実施例No.1〜
No.4の装飾品加工用白金合金と、従来例No.5、
No.6の装飾品加工用白金合金を溶解、鋳造にて
作製し、次いで700℃〜900℃で熱間鍛造し、さら
に75％の冷間圧延加工した後、硬さ、引張り強さ
及び高温での結晶粒の大きさを検査したところ、
下表の右欄に示すような結晶を得た。
The present invention relates to the improvement of platinum alloys used as processing materials for rings, necklaces, tie clips, watch frames, watch bands, lighters, eyeglass frames, writing instruments, earrings, etc., which are made by plastic processing. Conventionally, platinum-palladium alloy has been widely used as a processing material for rings, necklaces, tie clips, watch frames, watch bands, lighters, eyeglass frames, writing instruments, earrings, etc. made by plastic processing. - Palladium alloy has excellent plastic workability, but because of its low mechanical strength and particularly low hardness, it is easily scratched and stamped during polishing after plastic processing, and it is difficult to produce metallic luster, and it is difficult to finish. When used as an item, they are easily scratched, and in the case of rings with jewels, the part that holds the jewels loosens, causing the jewels to fall off. The present invention has been made in order to eliminate these drawbacks, and aims to provide a platinum alloy for processing ornaments that has excellent mechanical strength and plastic workability. One of the platinum alloys for processing ornaments according to the present invention is
One consists of 1 to 15 w/o of cobalt, the balance being platinum, and the other one consists of 1 to 15 w/o of cobalt, 0.01 to 3 w/o of yttrium, the balance being platinum. In the platinum alloy for processing ornaments according to the present invention,
The reason why cobalt is added to platinum is to improve mechanical strength, and the reason why the amount added is limited to 1 to 15 w/o is because if it is less than 1 w/o, the mechanical strength is insufficient. This is because if it exceeds 15 w/o, plastic workability will be significantly reduced. Furthermore, yttrium was added to prevent coarsening of crystal grains at high temperatures (for example, during brazing) and to prevent a decrease in mechanical strength.
If it is less than 0.01w/o, it will not be possible to prevent the coarsening of crystal grains at high temperatures, resulting in a decrease in mechanical strength, and if it exceeds 3w/o, even if more is added, coarsening of the crystal grains will not be prevented. This is because no improvement has been seen. Examples and conventional examples will be described below in order to clarify the effects of the platinum alloy for processing ornaments according to the present invention. Example No. 1 ~ of the component composition shown in the left column of the table below
No. 4 platinum alloy for processing ornaments, conventional example No. 5,
No. 6 platinum alloy for ornamental processing is produced by melting and casting, then hot forging at 700°C to 900°C, and then 75% cold rolling. When inspecting the size of crystal grains at
Crystals as shown in the right column of the table below were obtained.
【表】
上記表で明らかなように本発明による装飾品加
工用白金合金は、従来の装飾品加工用合金に比べ
て塑性加工後の硬さ、引張り強さに優れ、また高
温での結晶粒の大きさが極めて小さく、機械的強
さの低下が少いことが判る。
以上詳記した通り本発明による装飾品加工用白
金合金は、常温は勿論のこと高温でも機械的強さ
に優れ且つ塑性加工性も優れているので、従来の
装飾品加工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] As is clear from the table above, the platinum alloy for processing ornaments according to the present invention has superior hardness and tensile strength after plastic working compared to conventional alloys for processing ornaments, and also has crystal grains at high temperatures. It can be seen that the size is extremely small, and the decrease in mechanical strength is small. As detailed above, the platinum alloy for processing ornaments according to the present invention has excellent mechanical strength and plastic workability not only at room temperature but also at high temperatures, so it is superior to conventional platinum alloys for processing ornaments. It can be said to be an epoch-making product that can be replaced.
Claims (1)
品加工用白金合金。 ２ コバルト１〜15w/o、イツトリウム0.01〜３
w/o、残部白金より成る装飾品加工用白金合金。[Claims] 1. A platinum alloy for processing ornaments, comprising 1 to 15 w/o of cobalt and the balance being platinum. 2 Cobalt 1~15w/o, Yttrium 0.01~3
A platinum alloy for processing ornaments, w/o, the balance being platinum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16218778A JPS5585645A (en) | 1978-12-25 | 1978-12-25 | Platinum alloy for working accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16218778A JPS5585645A (en) | 1978-12-25 | 1978-12-25 | Platinum alloy for working accessory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5585645A JPS5585645A (en) | 1980-06-27 |
| JPS6137342B2 true JPS6137342B2 (en) | 1986-08-23 |
Family
ID=15749651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16218778A Granted JPS5585645A (en) | 1978-12-25 | 1978-12-25 | Platinum alloy for working accessory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5585645A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59143032A (en) * | 1983-02-04 | 1984-08-16 | Mitsubishi Metal Corp | Surface hardened pt alloy member for decoration |
| JPS6134138A (en) * | 1984-07-25 | 1986-02-18 | Tanaka Kikinzoku Kogyo Kk | Platinum alloy for accessory |
| US5518691A (en) * | 1993-07-29 | 1996-05-21 | Tanaka Kikinzoku Kogyo K.K. | Precious metal material |
-
1978
- 1978-12-25 JP JP16218778A patent/JPS5585645A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5585645A (en) | 1980-06-27 |
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