JPH0216524B2 - - Google Patents
Info
- Publication number
- JPH0216524B2 JPH0216524B2 JP16962881A JP16962881A JPH0216524B2 JP H0216524 B2 JPH0216524 B2 JP H0216524B2 JP 16962881 A JP16962881 A JP 16962881A JP 16962881 A JP16962881 A JP 16962881A JP H0216524 B2 JPH0216524 B2 JP H0216524B2
- Authority
- JP
- Japan
- Prior art keywords
- silver
- carbon composite
- composite material
- layer
- electrical contact
- 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
- 239000010410 layer Substances 0.000 claims description 27
- 239000000463 material Substances 0.000 claims description 27
- 239000002131 composite material Substances 0.000 claims description 25
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 23
- RRKGBEPNZRCDAP-UHFFFAOYSA-N [C].[Ag] Chemical compound [C].[Ag] RRKGBEPNZRCDAP-UHFFFAOYSA-N 0.000 claims description 23
- 229910052709 silver Inorganic materials 0.000 claims description 22
- 239000004332 silver Substances 0.000 claims description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000003378 silver Chemical class 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は電気接点材料として用いられる銀−炭
素複合材に関するものであり、更に言うならば接
点金属となる銀−炭素複合材と、接点端子板とを
接合する際の接合強度を向上させる目的で、銀−
炭素複合材の接点端子板との接合面に銀層を設け
る為の製造方法に関するものである。Detailed Description of the Invention The present invention relates to a silver-carbon composite material used as an electrical contact material, and more specifically to a silver-carbon composite material used as a contact metal and a contact terminal plate. In order to improve the bonding strength, silver
The present invention relates to a manufacturing method for providing a silver layer on the bonding surface of a carbon composite material to a contact terminal plate.
一般に銀−炭素複合材は耐溶着性に優れる為
に、中電流域用の電気接点材料として、デイスク
状等の形状に成形加工後、接点端子板に抵抗溶接
等により取り付けて使用されるものであるが耐溶
着性に優れるが故に抵抗溶接等の際にはこの耐溶
着性が障害となり充分なる接合強度が得られない
ものである。 In general, silver-carbon composites have excellent adhesion resistance, so they are used as electrical contact materials for medium current ranges by forming them into a disc shape or other shape and then attaching them to contact terminal plates by resistance welding, etc. However, because it has excellent adhesion resistance, this adhesion resistance becomes an obstacle during resistance welding, etc., and sufficient joint strength cannot be obtained.
そこで接合強度を向上させる目的で銀−炭素複
合材の接点端子板との接合面に銀層を設けこの銀
層を介して銀−炭素複合材と接点端子板とを接合
し電気接触子として用いられていた。 Therefore, in order to improve the bonding strength, a silver layer is provided on the bonding surface of the silver-carbon composite material with the contact terminal plate, and the silver-carbon composite material and the contact terminal plate are bonded through this silver layer and used as an electrical contact. It was getting worse.
ところで従来の銀−炭素複合材から成る電気接
点材の製造方法に於いては、銀粉末と炭素粉末と
を所望の割合になる様に混合した後、これを圧縮
成形加工し焼結の工程を経た後、押出加工、圧延
加工等が施され板状長尺材と成した後、接点端子
板との接合面となる一側面に銀テープ材をクラツ
ドし、然る後デイスク状等の形状に打抜き、これ
を抵抗溶接等により銀テープ材を介して接点端子
板に取り付け、電気接触子と成して使用されてい
たが、銀−炭素複合材と銀の接合強度は充分とは
言えず、電気接触子として使用時に接点金属とな
る銀−炭素複合材と銀テープ材との接合面より剥
離してしまう場合があり、その信頼性に欠けるも
のであつた。 By the way, in the conventional manufacturing method of electrical contact materials made of silver-carbon composite materials, silver powder and carbon powder are mixed in a desired ratio, and then compression molded and sintered. After that, extrusion processing, rolling processing, etc. are performed to form a long plate-like material, and then a silver tape material is clad on one side that will be the joint surface with the contact terminal plate, and then it is shaped into a disc-like shape etc. This was punched out and attached to a contact terminal plate via a silver tape material using resistance welding, etc., and used as an electrical contact, but the bonding strength between the silver-carbon composite material and silver was not sufficient. When used as an electrical contact, the silver-carbon composite material serving as the contact metal and the silver tape material may peel off from the bonding surface, resulting in a lack of reliability.
本発明は上述した様な諸事情に鑑みて成された
ものであり、銀−炭素複合材の接点端子板との接
合面に銀層を設け、且つその接合強度が充分なる
電気接点用素材の製造方法を提供せんとするもの
である。 The present invention has been made in view of the above-mentioned circumstances, and provides a material for electrical contacts that has a silver layer on the bonding surface of a silver-carbon composite material with a contact terminal plate and has sufficient bonding strength. The purpose is to provide a manufacturing method.
以下本発明より成る電気接点用素材の製造方法
について説明すると、所望配合になる様に銀粉末
と炭素粉末とを混合した銀と炭素の混合粉末を、
プレス金型等の耐圧容器に充填し、これを圧縮、
成形した後真空焼結し、第１図に示す様な銀−炭
素複合材１のビレツト２とする。このビレツト２
を更に酸化性雰囲気中で加熱し、第２図に示す様
に、その表面に脱炭層３を形成したビレツト２′
と成す。然る後このビレツト２′に押出加工、圧
延加工を施し、第３図に示す様な銀−炭素複合材
１の周囲に脱炭層３を形成した電気接点用素材４
と成すものである。 The method for manufacturing the electrical contact material according to the present invention will be explained below.A mixed powder of silver and carbon is mixed with silver powder and carbon powder to obtain a desired composition.
Fill a pressure-resistant container such as a press mold, compress it,
After molding, it is vacuum sintered to form a billet 2 of silver-carbon composite material 1 as shown in FIG. This billet 2
is further heated in an oxidizing atmosphere to form a billet 2' with a decarburized layer 3 formed on its surface, as shown in FIG.
It is accomplished. Thereafter, this billet 2' is extruded and rolled to form an electrical contact material 4 with a decarburized layer 3 around the silver-carbon composite material 1 as shown in FIG.
This is what is accomplished.
然るに本発明の製造方法により得られる電気接
点用素材は、銀−炭素複合材の表面部を脱炭処理
し銀のみの層と成し、この銀層を介して接点端子
板と接合する為に従来の方法の様に銀−炭素複合
材と成した後に、その一側面に銀テープ材をクラ
ツドする方法と比較して、接点端子板との接合強
度はより向上するものである。 However, in the electrical contact material obtained by the manufacturing method of the present invention, the surface of the silver-carbon composite material is decarburized to form a layer of only silver, and it is bonded to a contact terminal plate through this silver layer. Compared to the conventional method of forming a silver-carbon composite material and then cladding one side thereof with a silver tape material, the bonding strength with the contact terminal plate is further improved.
尚銀−炭素複合材の表面に形成させる脱炭層３
の厚さは、接点端子との接合強度の面から100μ
ｍ以上が好ましい。 Decarburized layer 3 formed on the surface of the silver-carbon composite material
The thickness is 100μ from the viewpoint of bonding strength with the contact terminal.
m or more is preferable.
次に本発明を更に明瞭にする為に、その具体的
な実施例及び従来例との比較について説明する。 Next, in order to further clarify the present invention, specific examples thereof and comparison with conventional examples will be described.
銀粉末とグラハイト粉末とを、銀−5W／Ｏグ
ラハイトの割合になる様に混合し、この銀粉末と
グラハイト粉末の混合粉末をプレス金型に充填
し、これを圧縮、成形した後真空焼結管に挿入し
900℃にて45分間保持し、真空焼結を行ない、第
１図に示す様な直径130mmの銀−炭素複合材１の
ビレツト２とした。このビレツト２を更に大気中
にて800℃にて４時間加熱し、第２図に示す様に
その表面に脱炭層３を形成しビレツト２′とした。
然る後このビレツト２′を押出加工し、8mmの線
状電気接点用素材とした。この時の脱炭層（銀
層）の厚さを測定したところ約110μｍであつた。
更にこの8mmの線材に圧延加工を施し第３図に示
す様な厚さ５mm、幅10mmの帯状電気接点用素材４
とした。その後、この帯材４の脱炭層３の内、接
点端子板との接合面となる一側面のみを残す様に
切削ダイスにて切削加工を行ない、第４図に示す
様に、その一側面のみに脱炭層３を有する銀−グ
ラハイト複合材１より成る厚さ4.5mm、幅９mmの
電気接点材料５を得た。
Silver powder and grahite powder are mixed at a ratio of silver-5W/O grahite, this mixed powder of silver powder and grahite powder is filled into a press mold, and after being compressed and molded, vacuum sintering is performed. insert into the tube
The material was held at 900 DEG C. for 45 minutes and vacuum sintered to form a billet 2 of silver-carbon composite material 1 having a diameter of 130 mm as shown in FIG. This billet 2 was further heated in the atmosphere at 800° C. for 4 hours to form a decarburized layer 3 on its surface as shown in FIG. 2, forming a billet 2'.
Thereafter, this billet 2' was extruded into a material for a 8 mm linear electrical contact. The thickness of the decarburized layer (silver layer) at this time was measured and was approximately 110 μm.
This 8mm wire rod is then rolled to create a strip-shaped electrical contact material 4 with a thickness of 5mm and a width of 10mm as shown in Figure 3.
And so. Thereafter, cutting is performed using a cutting die to leave only one side of the decarburized layer 3 of this strip material 4, which will be the bonding surface with the contact terminal plate, as shown in FIG. 4. An electrical contact material 5 having a thickness of 4.5 mm and a width of 9 mm made of a silver-graphite composite material 1 having a decarburized layer 3 was obtained.
銀−5W／Ｏグラハイト帯材に銀テープをクラ
ツドし、更に圧延して実施例で得た電気接点材料
５と同一寸法の電気接点材料を得た。
A silver-5W/O graphite strip was clad with a silver tape and further rolled to obtain an electrical contact material having the same dimensions as electrical contact material 5 obtained in Example.
然してこれら実施例及び従来例で得られた電気
接点材料をそれぞれ5mmのデイスク状に打抜き加
工を行ない電気接点とした。この電気接点の銀層
面を銅の接点端子板に抵抗溶接により取り付けた
電気接触子の、それぞれ各50ケについてその接合
強度を比較する為に剪断試験を行なつた。 The electrical contact materials obtained in these Examples and Conventional Examples were each punched into a 5 mm disc shape to form electrical contacts. A shear test was conducted on each of 50 electrical contacts in which the silver layer surface of the electrical contacts was attached to a copper contact terminal plate by resistance welding in order to compare the bonding strength.
その結果、本発明により得られた電気接触子の
剪断強度は最高16.3Kg／mm2、最低15.0Kg／mm2、平
均16.0Kg／mm2であつたのに対し、従来の方法によ
り得られた電気接触子の剪断強度は最高10.8Kg／
mm2、最低5.2Kg／mm2、平均8.3Kg／mm2であり本発明
により得られた電気接触子の剪断強度は従来のも
のと比較して倍近い値であつた。 As a result, the shear strength of the electrical contact obtained by the present invention was a maximum of 16.3 Kg/mm 2 , a minimum of 15.0 Kg/mm 2 , and an average of 16.0 Kg/mm 2 , whereas that of the electrical contact obtained by the conventional method The shear strength of the electrical contact is up to 10.8Kg/
mm 2 , a minimum of 5.2 Kg/mm 2 and an average of 8.3 Kg/mm 2 , and the shear strength of the electrical contact obtained by the present invention was nearly double that of the conventional one.
又その剪断面を観察したところ、従来の方法に
より得られた電気接触子はその殆んどが銀−炭素
複合材と銀テープ材との間で剪断されていたのに
対し、本発明より成る方法により得られた電気接
触子は、銀−炭素複合材の表面に形成させた脱炭
層（銀層）と銅より成る接点端子板との間での剪
断であり、銀−炭素複合材と脱炭層との境界より
剪断されているのは皆無であつた。 Furthermore, when we observed the sheared surface, it was found that most of the electrical contacts obtained by the conventional method were sheared between the silver-carbon composite material and the silver tape material, whereas the electrical contacts obtained by the present invention The electrical contact obtained by this method is a shear between the decarburized layer (silver layer) formed on the surface of the silver-carbon composite and the contact terminal plate made of copper. There were no areas that were sheared beyond the boundary with the coal seam.
尚、本発明に於ける酸化性雰囲気中での加熱に
よる脱炭処理は、脱炭による空隙を塑性加工によ
つて押し漬して無くす意味から最終工程で行なう
よりもその前段階で行なう方が好ましく、脱炭層
（銀層）を均一に形成し脱炭による空隙を全てな
くす意味からすると、焼結直後の銀−炭素複合材
に行なうのが最も好ましい。 In addition, in the present invention, it is better to perform the decarburization treatment by heating in an oxidizing atmosphere in the previous stage rather than in the final process in order to eliminate the voids caused by decarburization by impregnating it by plastic working. Preferably, from the viewpoint of uniformly forming a decarburized layer (silver layer) and eliminating all voids caused by decarburization, it is most preferable to perform this on the silver-carbon composite material immediately after sintering.
以上詳細に説明した通り、本発明による電気接
点用素材の製造方法は銀−炭素複合材の表面層を
脱炭処理により、脱炭層即ち銀のみの層と成し、
この銀層を介して接点端子板と接合し電気接触子
とする為に、その接合強度は従来のものと比較し
てより以上のものが得られ、従つて電気接触子と
して使用した際に、接点金属となる銀−炭素複合
材が脱炭層との境界より剥離したりすることがな
く、高い信頼性が得られるものである。 As explained in detail above, the method for manufacturing the material for electrical contacts according to the present invention involves decarburizing the surface layer of the silver-carbon composite material to form a decarburized layer, that is, a layer made only of silver,
Since it is bonded to the contact terminal plate through this silver layer to form an electric contact, the bonding strength is higher than that of conventional ones, and therefore, when used as an electric contact, The silver-carbon composite material serving as the contact metal does not peel off from the boundary with the decarburized layer, and high reliability can be obtained.
第１図は銀−炭素複合材からなるビレツトの断
面図、第２図は第１図の銀−炭素複合材を酸化性
雰囲気中で加熱し、その表面層に脱炭層を形成し
たビレツトの断面図、第３図は第２図のビレツト
を塑性加工して得た帯材の斜視図、第４図は第３
図の帯材の脱炭層のうち接点端子板との接合面と
なる一側面のみを残した帯材の斜視図。
１……銀−炭素複合材、２，２′……ビレツト、
３……脱炭層、４，５……帯材。
Figure 1 is a cross-sectional view of a billet made of a silver-carbon composite material, and Figure 2 is a cross-sectional view of a billet made of the silver-carbon composite material of Figure 1 heated in an oxidizing atmosphere to form a decarburized layer on its surface layer. Fig. 3 is a perspective view of a strip material obtained by plastic working the billet shown in Fig. 2, and Fig.
FIG. 3 is a perspective view of the strip material in which only one side of the decarburized layer of the strip material shown in the figure is left as a bonding surface with a contact terminal plate. 1...Silver-carbon composite material, 2,2'...Billet,
3... Decarburized layer, 4, 5... Strip material.
Claims (1)
化性雰囲気中にて加熱しその表面層に脱炭層を形
成する事を特徴とする電気接点用素材の製造方
法。1. A method for producing a material for electrical contacts, which comprises heating a silver-carbon composite material in which carbon is dispersed in a silver base in an oxidizing atmosphere to form a decarburized layer on its surface layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16962881A JPS5873918A (en) | 1981-10-23 | 1981-10-23 | Method of producing blank for electric contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16962881A JPS5873918A (en) | 1981-10-23 | 1981-10-23 | Method of producing blank for electric contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5873918A JPS5873918A (en) | 1983-05-04 |
| JPH0216524B2 true JPH0216524B2 (en) | 1990-04-17 |
Family
ID=15890019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16962881A Granted JPS5873918A (en) | 1981-10-23 | 1981-10-23 | Method of producing blank for electric contact |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5873918A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008056264A1 (en) * | 2008-11-06 | 2010-05-27 | Ami Doduco Gmbh | Process for producing a semifinished product and semifinished product for electrical contacts and contact piece |
-
1981
- 1981-10-23 JP JP16962881A patent/JPS5873918A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5873918A (en) | 1983-05-04 |
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