JPS60177153A

JPS60177153A - Golden copper alloy for ornamentation

Info

Publication number: JPS60177153A
Application number: JP3290284A
Authority: JP
Inventors: Hiroshi Tamemasa; 博史為政
Original assignee: Tanaka Kikinzoku Kogyo KK
Current assignee: Tanaka Kikinzoku Kogyo KK
Priority date: 1984-02-23
Filing date: 1984-02-23
Publication date: 1985-09-11
Also published as: JPH0332618B2

Abstract

PURPOSE:To obtain a golden Cu alloy for ornamentation having superior corrosion resistance and workability by adding specified amounts of Zn, Pb and a noble metal to Cu. CONSTITUTION:A golden Cu alloy for ornamentation having superior corrosion resistance and mechanical properties such as cold workability and machinability is obtd. by adding 7-45wt% Zn, 0.01-3wt% Pb and 0.01-2wt% noble metal such as Au, Ag, Pt, Pd, Rh, Ru, Ir or Os to Cu.

Description

【発明の詳細な説明】本発明は、装飾用金合金の代用として用いられる黄金色
系銅合金に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a golden copper alloy used as a substitute for decorative gold alloys.

近年の省資源化に伴い、装飾用金合金の代用として黄金
色系合金材料が要求されている。With the recent efforts to save resources, golden alloy materials are required as a substitute for decorative gold alloys.

一般に装飾品に於いては、耐食性が良好であることが具
備条件の一つとされている。更には、これ等の装飾品は
装飾性の面から、複雑な加工が施される為、その加工が
容易であること、さらにその色が黄金色に近いことも併
せて要求されている。In general, one of the requirements for decorative items is good corrosion resistance. Furthermore, since these ornaments are subjected to complex processing for decorative purposes, they are also required to be easy to process and to have a color close to golden yellow.

ところで、装飾用黄金色系材料として用いられている合
金としてはＺ　ｎ　３０ｗｔ％、残部Ｃｕより成る黄銅
合金があるが、この合金は耐食性が悪く、複雑な形状に
加工しづらいという欠点があった。Incidentally, an alloy used as a decorative golden-colored material is a brass alloy consisting of 30 wt% Zn and the balance Cu, but this alloy has the disadvantage of poor corrosion resistance and difficulty in processing into complex shapes. .

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、銅系合金で耐食性、加工性（冷間加工性、４：Ａ
耐性）に優れ、かつ黄金色を有する装飾用黄金色系銅合
金を提供せんとするものである。The present invention has been made to eliminate the above-mentioned drawbacks, and has been developed to improve corrosion resistance and workability (cold workability, 4:A) using copper-based alloys.
It is an object of the present invention to provide a decorative golden-colored copper alloy having excellent durability) and having a golden color.

本発明による装飾用黄金色系銅合金はＺｎ７〜４５−ｔ
％、ＰｂＯ，０１〜３ｗｔ％、貴金属０．０１〜２ｗｔ
％。The decorative golden copper alloy according to the present invention is Zn7-45-t.
%, PbO, 01-3wt%, noble metal 0.01-2wt
%.

残部Ｃｕより成る合金である。This is an alloy with the remainder being Cu.

本発明による装飾用黄金色系銅合金に於いて、Ｚｎを添
加した理由は、ＺｎはＣｕと合金を作った際に、黄金色
が得られる為であり、７ｗｔ％未満ではその効果が薄く
、４５ｗｔ％を超えるとβ相が現われ、薄板に加工する
ことが困難になる為である。The reason why Zn is added to the decorative golden-colored copper alloy according to the present invention is that Zn produces a golden color when alloyed with Cu, and if it is less than 7 wt%, the effect is weak. This is because if it exceeds 45 wt%, β phase will appear, making it difficult to process into a thin plate.

また、Ｐｂを添加した理由は、ｐｂはＣｕ中にほとんど
固溶せず、はとんどが結晶粒界に粒状になって析出し、
切削性が良好になる為であり、０．０１ｗｔ％未満では
その効果が薄く、３ｗｔ％を超えると耐食性が低下して
くる為である。In addition, the reason for adding Pb is that Pb hardly dissolves in solid solution in Cu, and most of it precipitates in the form of particles at grain boundaries.
This is because machinability becomes better, and if it is less than 0.01 wt%, the effect is weak, and if it exceeds 3 wt%, corrosion resistance decreases.

また、貴金属を添加した理由は、貴金属の微量添加によ
りＣｕ−Ｚｎ−Ｐｂ合金の耐食性をさらに向上させる為
であり、０．０１ｗｔ％未満ではその効果が薄（，２ｗ
ｔ％を超えてもあまり顕著な変化が見られなくなる為で
ある。ここで言う貴金属とは、Ａｕ、Ａｇ、Ｐｔ、Ｐｄ
、Ｒｈ、Ｒｕ、１ｒ、Ｏｓを含めてのことである。In addition, the reason for adding precious metals is to further improve the corrosion resistance of the Cu-Zn-Pb alloy by adding a small amount of precious metals.
This is because even if it exceeds t%, no significant change is observed. The precious metals mentioned here are Au, Ag, Pt, Pd.
, Rh, Ru, 1r, and Os.

以下本発明による装飾用黄金色系銅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。Examples and conventional examples will be described below in order to clarify the effects of the decorative golden copper alloy according to the present invention.

第１表に示す成分組成の実施例１〜４の装飾用黄金色糸
ｔｌｆｆｉ１合金と従来例１．２の装飾用黄金色系銅合
金の色、加工性（冷間加工性、切削）、耐汗性につい゛
ζテストしたところ第２表のような結果を得た。The color, workability (cold workability, cutting), and resistance of the decorative golden thread tlffi1 alloys of Examples 1 to 4 and the decorative golden copper alloy of Conventional Example 1.2 with the component compositions shown in Table 1. When the sweatability was tested by ζ, the results shown in Table 2 were obtained.

（以１−余白）第１表第２表なお、人工汗試験はＮ）１４　Ｃ１１５，５ｇ／ρ。(1-Margin) Table 1 Table 2 In addition, the artificial sweat test is N)14C115,5g/ρ.

Ｎ　ａ　Ｃｌ　２０ｇ／　１２．酢酸２．５ｇ　／　ｌ
！　、尿素５　ｇ　／　１．　。NaCl 20g/12. Acetic acid 2.5g/l
! , urea 5 g/1. .

乳酸１５ｇ／＊、ｐＨ４，７の液組成で液温４０℃、２
４０時間浸漬後判定した。Lactic acid 15g/*, pH 4.7 liquid composition, liquid temperature 40℃, 2
Judgment was made after 40 hours of immersion.

上記で明らかなように本発明による装飾用黄金色糸銅合
金は従来の装飾用黄金色系銅合金に比し、耐汗性、加工
性（冷間加工性、切削性）が優れ、かつ黄金色を有して
いることが判る。As is clear from the above, the decorative golden thread copper alloy according to the present invention has superior sweat resistance and workability (cold workability, machinability) compared to conventional decorative golden thread copper alloys, and has a golden color. It can be seen that it has a color.

以上詳記した通り、本発明の装飾用黄金色系銅合金は、
耐汗性、加工性（冷間加工性、切削性）が優れかつ黄金
色を有しているので、従来の装飾用黄金色系ｔμｍ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。As detailed above, the decorative golden copper alloy of the present invention is
Since it has excellent sweat resistance and workability (cold workability, machinability) and has a golden color, it can be said to be an epoch-making product that can replace conventional golden-colored tμm alloys for decoration.

出願人　田中貴金属工業株式会社Applicant Tanaka Kikinzoku Kogyo Co., Ltd.

Claims

[Claims]

Zinc 7-45-t%, lead 0. O1~3 coins (%, Takakikai 0
．． A decorative golden-colored copper alloy consisting of 1 to 2 wt% O and the balance copper.