JPH0117209B2 - - Google Patents
Info
- Publication number
- JPH0117209B2 JPH0117209B2 JP54146822A JP14682279A JPH0117209B2 JP H0117209 B2 JPH0117209 B2 JP H0117209B2 JP 54146822 A JP54146822 A JP 54146822A JP 14682279 A JP14682279 A JP 14682279A JP H0117209 B2 JPH0117209 B2 JP H0117209B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- electrical contact
- layer
- surface layer
- composite electrical
- 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
- 239000000463 material Substances 0.000 claims description 41
- 239000010410 layer Substances 0.000 claims description 33
- 239000002344 surface layer Substances 0.000 claims description 30
- 239000002131 composite material Substances 0.000 claims description 28
- 229910045601 alloy Inorganic materials 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 21
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 15
- 238000009792 diffusion process Methods 0.000 claims description 8
- 229910002482 Cu–Ni Inorganic materials 0.000 claims description 7
- 239000007787 solid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 229910000990 Ni alloy Inorganic materials 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Contacts (AREA)
Description
本発明は、複合電気接点材料に関するものであ
る。
従来、弱電用電気接点材料としてAu−Ag合金
が広く使用され、特にエレクトーン等の音響関係
用接点やコネクター用接点の材料としてはAu−
Ag20〜25w／ｏ合金が一般的に使用されてきた。
ところが近時、経済的な要望から改善が加えら
れ、第１図に示す如くCu−Ni30w／ｏ合金の内
部層１をAu−Ag25w／ｏ合金の表面層２にて内
包した複合電気接点材３を所要の長さに切断し
て、第２図に示す如く台材４に溶接し、第３図に
示す如く成形して成るコネクター用電気接点５が
実用化され、広く使用されている。
然し乍ら、かかるコネクター用電気接点５の複
合電気接点材３は、その内部層１と表面層２との
間の拡散層が無い為、台材４に溶接したとき溶接
時の熱により内部層１と表面層２との接合強さが
著しく低下し、次いでコネクター用電気接点５に
成形すると表面層２が剥がれたり、剥離したり
し、また、表面層２が割れたり、内部層１がはみ
出したりするものである。
本発明はかかる、問題を解決すべくなされたも
のであり、台材に溶接後の成形の際内部層と表面
層とが剥れたり剥離したりすることがなく、また
表面層が割れたり内部層がはみ出したりすること
のない複合電気接点材料を提供せんとするもので
ある。
本発明の複合電気接点材料は、Au−Ag合金の
表面層とCu−Ni合金の内部層とより成る複合電
気接点材料に於いて、前記Au−Ag合金の表面層
の厚さを5μ以上となし、Au−Ag合金層とCu−
Ni合金層との間の拡散層厚さ５〜20μとなしたこ
とを特徴とするものである。この複合電気接点材
料を作るには、第４図ａに示す如くAu−Ag合金
のパイプ６にCu−Ni合金線７を挿入し引抜加工
して仝図ｂに示す如き中実線８となし、次にこの
中実線８を600〜800℃にて20〜60分熱処理して
Au−Ag合金の表面層６′とCu−Ni合金の内部層
７′との間の拡散層の厚さを５〜20μとなし、然
る後所要の断面形状、例えば仝図ｃに示す如く下
面中央に突条９を有する断面矩形に成形してAu
−Ag合金の表面層６′の厚さを5μ以上の帯状の複
合電気接点材料１０となすものである。
本発明の複合電気接点材料に於いてAu−Ag合
金の表面層６′の層厚を5μ以上とする理由は、コ
ネクター用電気接点として使用に耐え得ないから
である。また拡散層の厚さを５〜20μとする理由
は、5μ未満だとAu−Ag合金の表面層６′とCu−
Ni合金の内部層７′との接合強度が不充分で所要
の断面形状に成形する際、剥れ、剥離等が生じる
ものであり、20μを超えると熱処理するには時間
がかかりすぎて生産性が悪くなり、しかも脆くな
つて成形加工時に割れるからである。
次に本発明による複合電気接点材料の効果を明
瞭ならしめる為にその具体的な実施例と従来例に
ついて説明する。
実施例 １
外径4.2mm、内径3.2mmの第４図ａに示す如きAu
−Ag25w／ｏ合金のパイプ６に、外径3.0mmのCu
−Ni30w／ｏ合金線７を挿入し、引抜加工して
仝図ｂに示す如き外径0.54mmの中実線８となし、
次にこの中実線８を750℃にて20分間熱処理して
Au−Ag25w／ｏ合金の表面層６′とCu−
Ni30w／ｏ合金の内部７′との間に7μの拡散層を
形成し、然る後仝図ｃに示す如く下面中央に高さ
0.04mm、幅0.08mm、曲率0.04Rmmの突条９を有す
る高さ0.3mm、幅0.5mmの断面矩形且つAu−
Ag25w／ｏ合金の表面層６′の厚さ18μの帯状の
複合電気接点材料１０を形成した。
実施例 ２
実施例１と同じ手順にて同一材料、同一寸法
で、拡散層が7u、Au−Ag25w／ｏ合金の表面層
６′の層厚が33μの複合電気接点材料１０を成形
した。
実施例 ３
実施例１と同じ手順にて同一材料、同一寸法
で、拡散層が18μ、Au−Ag25w／ｏ合金の表面
層６′の層厚が22μの複合電気接点材料１０を成
形した。
従来例 １
外径4.2mm、内径3.2mmのAu−Ag25w／ｏ合金
のパイプに、外径3.0mmのCu−Ni30w／ｏ合金線
を挿入し、引抜加工して外径0.54mmの中実線とな
し、この中実線をそのまま成形してAu−
Ag25w／ｏ合金の表面層の厚さ38μの実施例と同
一外形寸法の複合電気接点材料を得た。
従来例 ２
従来例と同じ手順にて同一材料、同一外径寸法
で、Au−Ag25w／ｏ合金の表面層の厚さ5μの複
合電気接点材料を得た。
従来例 ３
従来例１と同じ手順にて同一材料、同一外径寸
法で、Au−Ag25w／ｏの表面層の厚さ10μの複
合電気接点材料を得た。
然して実施例１〜３及び従来例１〜３の複合電
気材料各100ケを第２図に示す如く厚さ0.25mmの
台材４に溶接し、第３図に示す如く成形して高さ
0.25mm、幅0.67mmの複合電気接点材３を備えたコ
ネクター用電気接点５を作り、このコネクター用
電気接点５に於ける複合電気接点材３の表面層の
剥れ（剥離）、割れ（内部層のはみ出し）を調査
したところ下記の表の通りであつた。
The present invention relates to composite electrical contact materials. Traditionally, Au-Ag alloys have been widely used as electrical contact materials for light currents, and Au-Ag alloys have been used particularly as materials for acoustic contacts such as electronics and connector contacts.
Ag20-25 w/o alloys have been commonly used. However, in recent years, improvements have been made due to economic demands, and as shown in Fig. 1, a composite electrical contact material 3 has been developed in which an inner layer 1 of Cu-Ni30w/o alloy is enclosed in a surface layer 2 of Au-Ag25w/o alloy. An electrical contact 5 for a connector, which is made by cutting the material to a required length, welding it to a base material 4 as shown in FIG. 2, and molding it as shown in FIG. 3, has been put into practical use and is widely used. However, since the composite electrical contact material 3 of the electrical contact 5 for a connector does not have a diffusion layer between the inner layer 1 and the surface layer 2, when it is welded to the base material 4, the inner layer 1 and the inner layer 1 are separated by the heat during welding. The bonding strength with the surface layer 2 is significantly reduced, and when it is then formed into an electrical contact 5 for a connector, the surface layer 2 peels off or peels off, and the surface layer 2 cracks and the inner layer 1 protrudes. It is something. The present invention has been made to solve these problems, and the inner layer and the surface layer will not peel or peel off during forming after welding to the base material, and the surface layer will not crack or the inner layer will not peel off or peel off. It is an object of the present invention to provide a composite electrical contact material that does not cause layers to protrude. The composite electrical contact material of the present invention comprises a surface layer of Au-Ag alloy and an inner layer of Cu-Ni alloy, in which the surface layer of Au-Ag alloy has a thickness of 5μ or more. None, Au-Ag alloy layer and Cu-
It is characterized in that the thickness of the diffusion layer between the Ni alloy layer and the Ni alloy layer is 5 to 20 μm. To make this composite electrical contact material, a Cu-Ni alloy wire 7 is inserted into an Au-Ag alloy pipe 6 as shown in Fig. 4a, and drawn into a solid wire 8 as shown in Fig. 4b. Next, this solid wire 8 is heat treated at 600 to 800℃ for 20 to 60 minutes.
The thickness of the diffusion layer between the Au-Ag alloy surface layer 6' and the Cu-Ni alloy inner layer 7' is set to 5 to 20μ, and then the required cross-sectional shape is formed, for example as shown in Figure c. Au is formed into a rectangular cross section with a protrusion 9 at the center of the lower surface.
- The strip-shaped composite electrical contact material 10 has a surface layer 6' of Ag alloy with a thickness of 5 μm or more. The reason why the surface layer 6' of the Au--Ag alloy in the composite electrical contact material of the present invention is made to have a thickness of 5 microns or more is that it cannot withstand use as an electrical contact for a connector. The reason why the thickness of the diffusion layer is set to 5 to 20μ is that if it is less than 5μ, the surface layer 6' of the Au-Ag alloy and the Cu-
The bonding strength with the inner layer 7' of the Ni alloy is insufficient and peeling or delamination occurs when forming into the desired cross-sectional shape.If the thickness exceeds 20μ, heat treatment takes too much time and reduces productivity. This is because the material deteriorates and becomes brittle and cracks during molding. Next, in order to clarify the effects of the composite electrical contact material according to the present invention, specific examples and conventional examples thereof will be described. Example 1 Au as shown in Figure 4a with an outer diameter of 4.2 mm and an inner diameter of 3.2 mm.
−Ag25w/o alloy pipe 6 with Cu of outer diameter 3.0mm
- Insert a Ni30w/o alloy wire 7 and draw it to make a solid wire 8 with an outer diameter of 0.54 mm as shown in Figure b,
Next, this solid wire 8 was heat treated at 750℃ for 20 minutes.
Au-Ag25w/o alloy surface layer 6' and Cu-
A 7μ diffusion layer is formed between the inside 7' of the Ni30w/o alloy, and then a height is formed at the center of the bottom surface as shown in Figure c.
Au-
A strip-shaped composite electrical contact material 10 having a thickness of 18 μm was formed with a surface layer 6′ of Ag25w/o alloy. Example 2 A composite electrical contact material 10 was molded using the same materials and dimensions using the same procedure as in Example 1, with a diffusion layer of 7u and a surface layer 6' of Au-Ag25w/o alloy having a layer thickness of 33μ. Example 3 A composite electrical contact material 10 was molded using the same materials and dimensions using the same procedure as in Example 1, with a diffusion layer of 18μ and a surface layer 6' of Au-Ag25w/o alloy having a layer thickness of 22μ. Conventional example 1 A Cu-Ni30w/o alloy wire with an outer diameter of 3.0mm is inserted into an Au-Ag25w/o alloy pipe with an outer diameter of 4.2mm and an inner diameter of 3.2mm, and then drawn into a solid wire with an outer diameter of 0.54mm. None, mold this solid wire as it is and make Au-
A composite electrical contact material having the same external dimensions as the example with a surface layer of Ag25w/o alloy having a thickness of 38μ was obtained. Conventional Example 2 A composite electrical contact material was obtained using the same material, the same outer diameter, and a surface layer of Au-Ag25w/o alloy with a thickness of 5 μm using the same procedure as in the conventional example. Conventional Example 3 A composite electrical contact material was obtained using the same material, the same outer diameter, and a surface layer of Au-Ag25w/o with a thickness of 10 μm using the same procedure as in Conventional Example 1. 100 pieces each of the composite electrical materials of Examples 1 to 3 and Conventional Examples 1 to 3 were welded to a base material 4 with a thickness of 0.25 mm as shown in FIG. 2, and then molded as shown in FIG.
An electrical contact 5 for a connector equipped with a composite electrical contact material 3 having a width of 0.25 mm and a width of 0.67 mm is made, and the surface layer of the composite electrical contact material 3 in this electrical contact 5 for a connector is peeled off (peeling) and cracked (internally). When the layer protrusion was investigated, the results were as shown in the table below.
【表】
上記の表で明らかなように実施例１〜３の複合
電気接点材料はAu−Ag25w／ｏ合金の表面層の
剥れ（剥離）が全く無く、表面層の割れ、内部層
のはみ出しも皆無であるのに対し、従来例の複合
電気接点材料は表面層の剥れ（剥離）或いは表面
層の割れ（内部層のはみ出し）のいずれかが多量
に生じていることが判る。
以上詳記した通り本発明の複合電気接点材料
は、台材に溶接後成形した際にCu−Ni合金の内
部層とAu−Ag合金の表面層とが剥れたり剥離し
たりすることがなく、また表面層が割れたり内部
層がはみ出したりすることがないので、この複合
電気接点材料を用いれば高品質、高信頼性のコネ
クター用電気接点を作ることができるという優れ
た効果がある。[Table] As is clear from the table above, the composite electrical contact materials of Examples 1 to 3 had no peeling (peeling) of the surface layer of the Au-Ag25w/o alloy, no cracking of the surface layer, and no protrusion of the inner layer. On the other hand, it can be seen that the conventional composite electrical contact material has a large amount of either peeling (peeling) of the surface layer or cracking of the surface layer (protrusion of the inner layer). As detailed above, the composite electrical contact material of the present invention prevents the internal layer of Cu-Ni alloy and the surface layer of Au-Ag alloy from peeling or peeling when formed after welding to a base material. Moreover, since the surface layer does not crack or the internal layer protrudes, this composite electrical contact material has the excellent effect of making high quality and highly reliable electrical contacts for connectors.
第１図はコネクター用複合電気接点材料の斜視
図、第２図及び第３図は第１図の複合電気接点材
料を用いるコネクター用電気接点の製造工程を示
す側断面図、第４図ａ，ｂ，ｃは本発明の複合電
気接点材料を作る工程を示す斜視図である。
６……Au−Ag合金のパイプ、７……Cu−Ni
合金線、６′……表面層、７′……内部層、８……
中実線、９……突条、１０……複合電気接点材
料。
FIG. 1 is a perspective view of the composite electrical contact material for connectors, FIGS. 2 and 3 are side sectional views showing the manufacturing process of the electrical contact for connectors using the composite electrical contact material of FIG. 1, and FIGS. b and c are perspective views showing the process of making the composite electrical contact material of the present invention. 6...Au-Ag alloy pipe, 7...Cu-Ni
Alloy wire, 6'... surface layer, 7'... internal layer, 8...
Solid wire, 9... Projection, 10... Composite electrical contact material.
Claims (1)
層とより成る複合電気接点材料に於いて、前記
Au−Ag合金の表面層の厚さを5μ以上となし、
Au−Ag合金層とCu−Ni合金層との間の拡散層
厚を５〜20μとなしたことを特徴とする複合電気
接点材料。1 In a composite electrical contact material consisting of a surface layer of Au-Ag alloy and an inner layer of Cu-Ni alloy, the above-mentioned
The thickness of the surface layer of the Au-Ag alloy is 5μ or more,
A composite electrical contact material characterized in that the thickness of the diffusion layer between the Au-Ag alloy layer and the Cu-Ni alloy layer is 5 to 20μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14682279A JPS5671221A (en) | 1979-11-13 | 1979-11-13 | Composite electric contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14682279A JPS5671221A (en) | 1979-11-13 | 1979-11-13 | Composite electric contact material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5671221A JPS5671221A (en) | 1981-06-13 |
| JPH0117209B2 true JPH0117209B2 (en) | 1989-03-29 |
Family
ID=15416306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14682279A Granted JPS5671221A (en) | 1979-11-13 | 1979-11-13 | Composite electric contact material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5671221A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50103674A (en) * | 1974-01-23 | 1975-08-15 | ||
| JPS515565A (en) * | 1974-07-03 | 1976-01-17 | Chugai Electric Ind Co Ltd | FUKUGODEN KISETSUTEN |
-
1979
- 1979-11-13 JP JP14682279A patent/JPS5671221A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50103674A (en) * | 1974-01-23 | 1975-08-15 | ||
| JPS515565A (en) * | 1974-07-03 | 1976-01-17 | Chugai Electric Ind Co Ltd | FUKUGODEN KISETSUTEN |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5671221A (en) | 1981-06-13 |
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