JPH0135912B2 - - Google Patents
Info
- Publication number
- JPH0135912B2 JPH0135912B2 JP56030246A JP3024681A JPH0135912B2 JP H0135912 B2 JPH0135912 B2 JP H0135912B2 JP 56030246 A JP56030246 A JP 56030246A JP 3024681 A JP3024681 A JP 3024681A JP H0135912 B2 JPH0135912 B2 JP H0135912B2
- Authority
- JP
- Japan
- Prior art keywords
- platinum
- alloy
- hardness
- present
- ornaments
- 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
- 230000032683 aging Effects 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 5
- 210000004243 sweat Anatomy 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000010437 gem Substances 0.000 description 3
- 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
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Landscapes
- Adornments (AREA)
- Contacts (AREA)
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製造方法に関するもの
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（５〜15w／ｏ）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品
用白金合金の製造方法を提供せんとするものであ
る。
本発明による装飾品用白金合金の製造方法は、
クロム２〜８重量％及び残部白金よりなる合金を
溶体化処理後時効処理を施し、当該合金の硬度を
高くすることを特徴とするものである。
本発明による装飾用白金合金の製造方法に於い
て、クロムを添加した理由は、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
で時効させると時効硬化性を現わす為である。そ
の添加量が2w／ｏ未満では、硬さの改善が殆ん
どなく、8w／ｏを超えるとPtとCrが金属間化合
物を作り、加工性が悪くなるからである。
以下、本発明による装飾品用白金合金の製造方
法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.４の装
飾品用白金合金と従来例No.５、No.６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 a method for producing a platinum alloy used as a material 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 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
Due to low mechanical strength, especially hardness, scratches and scratches occur during polishing.
It is easy to get scratched and hard to get shiny, and it is also easy to get scratched when used as a finished product, and in the case of rings with jewels, the part that holds the jewels loosens and the jewels can fall off. Ta. The present invention was made in order to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a method for producing a platinum alloy for decorative articles that has excellent mechanical strength and workability. The method for producing a platinum alloy for ornaments according to the present invention includes:
It is characterized in that an alloy consisting of 2 to 8% by weight of chromium and the balance platinum is subjected to solution treatment and then aging treatment to increase the hardness of the alloy. The reason why chromium is added in the method for manufacturing decorative platinum alloys according to the present invention is that, after performing solution treatment in which it is heated to a solid solution region and then rapidly cooled, it exhibits age hardening properties when aged at an appropriate temperature. It is. If the amount added is less than 2 w/o, there is almost no improvement in hardness, and if it exceeds 8 w/o, Pt and Cr form an intermetallic compound, resulting in poor workability. Examples and conventional examples will be described below in order to clarify the effects of the method for manufacturing a platinum alloy for decorative articles according to the present invention. Hardness after solution treatment of platinum alloys for ornaments of Examples No. 1 to No. 4 and platinum alloys for ornaments of Conventional Examples No. 5 and No. 6 with the composition shown in Table 1, after aging When the hardness and sweat resistance were measured, 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。
また、第１表の実施例No.２について1200℃で溶
体化処理後、600℃、700℃の温度で時効処理を施
し、その硬度と時効時間の関係を測定したとこ
ろ、図に示す如く結果を得た。実施例No.２につい
ては、時効時間が1.5時間以内が好ましいことが
判る。
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、単に溶体化処理だけした合金や従来の
装飾品用白金合金に比し時効処理後の硬さが優
れ、耐汗性についても優れていることが判る。
以上詳記した通り、本発明の製造方法による装
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 1.2 g/g/, pH 4.7. In addition, Example No. 2 in Table 1 was solution-treated at 1200°C and then aged at temperatures of 600°C and 700°C, and the relationship between hardness and aging time was measured, and the results were as shown in the figure. I got it. It can be seen that for Example No. 2, the aging time is preferably 1.5 hours or less. As is clear from the above, the platinum alloy for decorative items according to the present invention has superior hardness after aging treatment and superior sweat resistance compared to alloys that have been simply solution-treated or conventional platinum alloys for decorative items. I know that there is. As detailed above, the platinum alloy for ornaments produced by the production method of the present invention has extremely excellent workability, mechanical strength, and sweat resistance, and can therefore replace conventional platinum alloys for ornaments. It can be said to be groundbreaking.
図は、実施例No.２を600℃及び700℃で時効処理
したときの時効時間と硬度の関係を示すグラフで
ある。
The figure is a graph showing the relationship between aging time and hardness when Example No. 2 was aged at 600°C and 700°C.
Claims (1)
金を溶体化処理後時効処理を施し、当該合金の硬
度を高くすることを特徴とする装飾品用白金合金
の製造方法。1. A method for producing a platinum alloy for ornaments, which comprises subjecting an alloy consisting of 2 to 8% by weight of chromium and the balance to platinum to a solution treatment followed by an aging treatment to increase the hardness of the alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3024681A JPS57145951A (en) | 1981-03-03 | 1981-03-03 | Platinum alloy for accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3024681A JPS57145951A (en) | 1981-03-03 | 1981-03-03 | Platinum alloy for accessory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57145951A JPS57145951A (en) | 1982-09-09 |
| JPH0135912B2 true JPH0135912B2 (en) | 1989-07-27 |
Family
ID=12298346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3024681A Granted JPS57145951A (en) | 1981-03-03 | 1981-03-03 | Platinum alloy for accessory |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57145951A (en) |
Families Citing this family (2)
| 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 |
| JP6372952B2 (en) * | 2013-10-25 | 2018-08-15 | 石福金属興業株式会社 | Probe pin material composed of a Pt-based alloy and method for manufacturing the probe pin |
-
1981
- 1981-03-03 JP JP3024681A patent/JPS57145951A/en active Granted
Non-Patent Citations (1)
| Title |
|---|
| CONSTITUTION OF BINARY ALLOYS=1958US * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57145951A (en) | 1982-09-09 |
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