JPS62130241A - Silver material for ornament - Google Patents

Abstract

PURPOSE:To improve a silver material for an ornament by dispersing uniformly and finely a specified amount of manganese oxide and tin oxide in silver so as to produce the silver material. CONSTITUTION:The composition of this silver material for an ornament consists of 85-99.5wt% silver and 0.5-15wt% manganese oxide and tin oxide. The silver material is produced by powder metallurgical processing and the oxides of manganese and tin dispersed uniformly and finely in silver are converted into a grain refiner by heat treatment such as annealing or brazing. An oxide film is not formed by the heat treatment. Since the hardness of the silver material can be increased, a lustrous ornament hard to scratch can be produced. The resulting ornament has no irregularity in color and causes no defective brazing.

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
具、眼鏡枠、イヤリング等の装飾品に使用する銀材料の
改良に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention is used for ornaments such as rings, necklaces, brooches, tie clips, cufflinks, watch frames, watch bands, lighters, writing instruments, eyeglass frames, earrings, etc. This invention relates to improvements in silver materials.

（従来技術と問題点） 従来、上記の如き装飾品に使用する材料としては、恨−
銅（５〜１５重量％）合金が多用されている。(Prior art and problems) Conventionally, the materials used for the above-mentioned ornaments were
Copper (5-15% by weight) alloys are frequently used.

然し乍ら、この銀−＃１Ｉ（５〜１５重量％）合金は、
装飾品の製作段階で数回繰返される焼なまし、ろう付は
等の熱処理で合金の結晶粒が粗大化し易く、この為仕上
げ面の光沢が出に＜＜、且つ軟かくなりすぎ、傷が付き
易（なる。また焼なましやろう付は等の熱処理は、その
殆んどが大気中で行われ、恨−銅合金中の銅は酸化し易
い為、熱処理により材料表面に酸化銅の皮膜が形成され
る。この酸化皮膜は強固であるので機械的に削り取るか
、酸洗いなど化学的処理をして取り除かなければならな
い。またその酸化皮膜は均一に取りにくい為、最終的に
製品の色むらの原因になる。さらにろう付は作業に於い
ては、ろう付は部が酸化し、酸化銅によりろう付けしに
くくなったり、ろう付は不良になり易い等の問題点があ
った。However, this silver-#1I (5-15% by weight) alloy is
Heat treatments such as annealing and brazing that are repeated several times during the production of decorative items tend to coarsen the crystal grains of the alloy, resulting in the finished surface becoming less shiny and becoming too soft, causing scratches. In addition, most heat treatments such as annealing and brazing are performed in the atmosphere, and copper in copper alloys is easily oxidized, so heat treatment causes copper oxide to form on the surface of the material. A film is formed. Since this oxide film is strong, it must be removed mechanically or by chemical treatment such as pickling. Also, since the oxide film is difficult to remove uniformly, it ultimately affects the quality of the product. This causes uneven coloring.Furthermore, during brazing work, there are problems such as the brazing parts become oxidized, copper oxide makes it difficult to braze, and brazing tends to be defective.

（発明の目的） 本発明は上記の銀−銅合金より成る装飾品用銀材料の問
題点を解決すべくなされたものであり、焼なまし、ろう
付は等の熱処理で、結晶粒の粗大化が無く、硬さを高く
することができ、酸化皮膜が生じることが無く、ろう付
は不良の生じることの無い装飾品用銀材料を提供するこ
とを目的とするものである。(Object of the Invention) The present invention was made to solve the problems of the above-mentioned silver material for decorative items made of a silver-copper alloy. The object of the present invention is to provide a silver material for decorative items that does not cause corrosion, has high hardness, does not form an oxide film, and does not cause defects during brazing.

（問題点を解決するための手段） 本発明の装飾品用銀材料は、眼中に酸化マンガンと酸化
錫を０．５〜１５重量％を均一微細に分散して成るもの
である。(Means for Solving the Problems) The silver material for ornaments of the present invention is made by uniformly and finely dispersing 0.5 to 15% by weight of manganese oxide and tin oxide in the eye.

本発明の装飾品用銀材料に於いて、眼中に酸化マンガン
と酸化錫を０．５〜１５重量％分散した理由は、０．５
重量％未満では焼なまし、ろう付は等の熱処理時の結晶
粒粗大化を抑えることができず、また硬さが低く、１５
重１％を超えると結晶細粒化及び硬さを硬くする効果は
一層良くなるが、塑性加工しにくくなり、材料が割れた
り、成形しにくくなるからである。In the silver material for ornaments of the present invention, the reason why 0.5 to 15% by weight of manganese oxide and tin oxide are dispersed in the eye is 0.5 to 15% by weight.
If it is less than 15% by weight, coarsening of crystal grains during heat treatment such as annealing and brazing cannot be suppressed, and the hardness is low.
If the weight exceeds 1%, the effect of grain refinement and hardness will be better, but it will become difficult to plastically work, the material will crack, and it will become difficult to mold.

（作用） 上記構成の本発明の装飾品用銀材料は、眼中に均一微細
に分散したマンガン及び錫の酸化物が、焼なまし、ろう
付は等の熱処理での結晶細粒化剤となって、熱処理によ
る結晶粒の粗大化を防ぎ、硬さも銀−銅合金より硬く維
持されるので、最終仕上げで光沢を出し易く、傷も付き
にくい。またマンガン及び錫の酸化物が既に眼中に分散
しているので、焼なまし、ろう付は等の大気中での熱処
理で酸化皮膜が生じることが無いので、恨−銅合金の場
合のように酸化皮膜を取り除（必要が無く、製品の色む
らも起らない。さらにろう付は部が酸化することが無い
ので、ろう付は作業がし易く、ろう付は不良も起りにく
い。(Function) In the silver material for ornaments of the present invention having the above structure, the manganese and tin oxides uniformly and finely dispersed in the eye act as crystal grain refining agents during heat treatments such as annealing and brazing. This prevents crystal grains from becoming coarse due to heat treatment and maintains hardness higher than that of silver-copper alloys, making it easier to produce a gloss in the final finish and resist scratches. In addition, since manganese and tin oxides are already dispersed in the eye, an oxide film will not be formed during heat treatment in the atmosphere such as annealing and brazing, so unlike in the case of copper alloys. There is no need to remove the oxide film, and there is no uneven coloring of the product.Furthermore, brazing parts do not oxidize, so brazing is easier to work with, and brazing is less likely to cause defects.

（実施例及び従来例）一 本発明の装飾品用銀材料の実施例１〜４は粉末冶金法に
て製作した下記の表の左欄に示す成分組成で、これらの
装飾品銀材料と、同じく下記の表の左欄に示す成分組成
の従来例１〜３の装飾品用銀材料とで各々ブローチを製
作した。この時焼なまし３回、ろう付け１個所、熱処理
回数合計４回行った。(Examples and Conventional Examples) Examples 1 to 4 of the silver materials for ornaments of the present invention were manufactured by powder metallurgy and had the component compositions shown in the left column of the table below, and these silver materials for ornaments, Similarly, brooches were manufactured using silver materials for decorative items of Conventional Examples 1 to 3 having the component compositions shown in the left column of the table below. At this time, annealing was performed three times, brazing was performed once, and heat treatment was performed a total of four times.

こうして製作したブローチの仕上げ面を検査し、ろう付
は強度、硬さを測定した処、下記の表の右欄に示す結果
を得た。The finished surface of the broach produced in this manner was inspected, and the brazing strength and hardness were measured, and the results shown in the right column of the table below were obtained.

（以下余白） 上記の表で明らかなように実施例１〜４の装飾品用銀材
料で製作したブローチは、従来例１〜３の装飾品用銀材
料で製作したブローチに比し、仕上げ面に光沢が有って
色むらが無く、またろう付は強度が高く、さらに硬度が
高くて傷が付きにくいことが判る。(Margins below) As is clear from the table above, the brooches made with the silver materials for decorations of Examples 1 to 4 have a better finished surface than the brooches made with the silver materials for decorations of Conventional Examples 1 to 3. It is clear that the surface is glossy and has no color unevenness, and that the brazing is strong and hard, making it difficult to scratch.

（発明の効果） 以上の説明で判るように本発明の装飾品用銀材料は、焼
なまし、ろう付は等の熱処理に於いて結晶粒の粗大化を
防止でき、硬さを高くすることができるので、光沢の有
る傷の付きにくい装飾品を製造することができる。また
本発明の装飾品用銀材料は、焼なまし、ろう付は等の熱
処理で酸化皮膜が生じることが無いので、酸化皮膜を取
り除く作業が不要で、色むらの無い装飾品を製造するこ
とができる。さらに本発明の装飾品用銀材料は、ろう付
は部分が酸化することが無いので、ろう付は作業が容易
で、ろう付は不良が無く、ろう付は強度の高い装飾品を
製造することができる等の優れた効果がある。(Effects of the Invention) As can be seen from the above explanation, the silver material for ornaments of the present invention can prevent coarsening of crystal grains during heat treatments such as annealing and brazing, and can increase hardness. This makes it possible to produce shiny, scratch-resistant decorative items. In addition, the silver material for decorative items of the present invention does not form an oxide film during heat treatment such as annealing or brazing, so there is no need to remove the oxide film, and decorative items without uneven color can be manufactured. I can do it. Furthermore, since the silver material for ornaments of the present invention does not oxidize during brazing, the brazing process is easy, the brazing process is free from defects, and the brazing process allows the manufacture of highly strong decorative items. It has excellent effects such as being able to.

Claims (1)

【特許請求の範囲】[Claims] 銀８５〜９９．５重量％中に酸化マンガンと酸化錫を０
．５〜１５重量％を均一微細に分散して成る装飾品用銀
材料。0 manganese oxide and tin oxide in 85-99.5% silver by weight
．． A silver material for ornaments comprising 5 to 15% by weight of silver material uniformly and finely dispersed.