JPS63102117A - Electric contact - Google Patents
Electric contactInfo
- Publication number
- JPS63102117A JPS63102117A JP61247837A JP24783786A JPS63102117A JP S63102117 A JPS63102117 A JP S63102117A JP 61247837 A JP61247837 A JP 61247837A JP 24783786 A JP24783786 A JP 24783786A JP S63102117 A JPS63102117 A JP S63102117A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- resistance
- oxide
- electrical
- temperature hardness
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 23
- 229910044991 metal oxide Inorganic materials 0.000 claims description 7
- 150000004706 metal oxides Chemical class 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims 1
- 238000003466 welding Methods 0.000 description 16
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Manufacture Of Switches (AREA)
- Contacts (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〔技術分野〕 この発明は電気接点に関する。[Detailed description of the invention] 〔Technical field〕 This invention relates to electrical contacts.
電磁接触機、リレー、ブレーカなどに用いられる電気接
点の中には、内部酸化法により生成した金属酸化物がＡ
ｇ中に分散されている接点材料で形成されたものがある
。これらの接点材料には、消耗が少なく、溶着しにくり
、かつ接触抵抗が低いという特性が要求される。しかし
、現実にはこれら３つの要求を同時に満たすことは困難
である現在、中でもリレーは、回路や装置の入力・出力
の制御に多用される傾向にある。そのため、接点に突入
電流が流れても溶着が起きない、すなわち、耐溶着性に
優れた接点材料が望まれている。Some electrical contacts used in electromagnetic contactors, relays, breakers, etc. contain metal oxides produced by internal oxidation.
Some are made of contact material dispersed in g. These contact materials are required to have characteristics such as low wear, resistance to welding, and low contact resistance. However, in reality, it is difficult to simultaneously satisfy these three requirements, and relays are increasingly being used to control the input and output of circuits and devices. Therefore, there is a demand for a contact material that does not cause welding even when an inrush current flows through the contact, that is, has excellent welding resistance.
さらに、接点により断続させる制御電流量も大きくなる
傾向があるため、耐溶着性に優れると同時に、接触抵抗
も低い接点材料が強く望まれている具体的には、Ａｇ−
ＣｄＯｌＡｇ−３ｎＯ２を用いて接点片を形成した電気
接点が使用されている。Ａｇ−Ｃｄ０電気接点は、酸化
物であるＣｄＯが接点の開閉によるアーク熱のため昇華
し、接点表面に酸化物が堆積しないので、接触抵抗が比
較的低い、ただ、溶着特性は十分とは言えない。Furthermore, since the amount of control current that is interrupted and interrupted by the contact tends to increase, a contact material that has excellent welding resistance and low contact resistance is strongly desired.
Electrical contacts are used in which contact pieces are formed using CdOlAg-3nO2. Ag-Cd0 electrical contacts have relatively low contact resistance because the oxide CdO sublimates due to the arc heat generated by the opening and closing of the contact, and no oxide is deposited on the contact surface.However, although the welding properties are sufficient, do not have.
Ａｇ−３ｎＯ，電気接点は、接触抵抗は十分とは言えな
いが、耐溶着性は比較的よい。Although the contact resistance of the Ag-3nO electrical contact is not sufficient, the welding resistance is relatively good.
この発明は、上記の事情に鑑み、溶着が起きにくいと同
時に接触抵抗も低い電気接点を提供することを目的とす
る。In view of the above circumstances, it is an object of the present invention to provide an electrical contact that is less prone to welding and has low contact resistance.
上記の目的を達成するため、発明者らは、接点材料の物
性に遡って、様々な角度からの検討をおこなった。その
結果、耐溶着性と高温硬度特性の間に相関関係があるこ
とを見出した。すなわち、１ｋＡの突入電流の容量性負
荷に接続された電気接点が溶着するまでの回数と、高温
硬度特性を示すＡ／Ｂ値との間に、正の相関関係がある
ことを見出したのである。ここでＡはＯ”Ｋ（絶対０度
）における硬度であり、Ｂは温度による硬度の低下率（
軟化率）をあられし、Ａ／Ｂを温強度係数とする。この
温強度係数Ａ／Ｂが大きい程、耐溶着性に優れる。In order to achieve the above object, the inventors conducted studies from various angles, going back to the physical properties of contact materials. As a result, it was found that there is a correlation between welding resistance and high temperature hardness properties. In other words, they found that there is a positive correlation between the number of times it takes for an electrical contact to weld when connected to a capacitive load with an inrush current of 1 kA, and the A/B value, which indicates high-temperature hardness characteristics. . Here, A is the hardness at O"K (absolute 0 degrees), and B is the rate of decrease in hardness due to temperature (
Let A/B be the thermal strength coefficient. The larger the thermal strength coefficient A/B is, the better the welding resistance is.
ここで温強度係数Ａ／Ｂが大きいということは、硬度Ａ
が同じであれば、温度による硬度の軟化率Ｂが小さいこ
とを意味し、軟化率Ｂが同じであれば硬度Ａが大きいこ
とを意味している。いずれにしても、高温における硬度
特性をあられしている。Here, a large thermal strength coefficient A/B means that the hardness A
If they are the same, it means that the softening rate B of hardness due to temperature is small, and if the softening rate B is the same, it means that the hardness A is large. In any case, the hardness characteristics at high temperatures are outstanding.
そして、さらに検討を続けた結果、温強度係数Ａ／Ｂを
大きくするには、Ａｇ中に分散される金属酸化物を微細
化すればよく、それには、例えば、Ａｇ−Ｃｄ０系、あ
るいは、Ａｇ−Ｃｄ０−３ｎＱｚ系接点材料の場合は、
さらにＡｌとＭｎを酸化物の形で含有させればよいこと
を見出したのである。ただ、高温硬度特性に優れた接点
材料を用いた電気接点は、耐溶着性には大変優れるが、
接触抵抗が増大したり不安定になる傾向がある。As a result of further studies, we found that in order to increase the thermal strength coefficient A/B, it is sufficient to make the metal oxide dispersed in Ag finer. - In the case of Cd0-3nQz type contact material,
Furthermore, they discovered that it is sufficient to contain Al and Mn in the form of oxides. However, electrical contacts using contact materials with excellent high-temperature hardness characteristics have excellent welding resistance;
Contact resistance tends to increase or become unstable.
そこで、さらに深く検討した結果、可動接点片と固定接
点片の両接点片の一方が、高温硬度特性の高い接点材料
で形成されていると、電気接点は、耐溶着性に優れ、し
かも、接触抵抗も低くて安定したものとなることを見出
すに至り、この発明を完成することができたのである。Therefore, as a result of further investigation, we found that if one of the movable contact pieces and the fixed contact piece is made of a contact material with high high temperature hardness characteristics, the electrical contacts will have excellent welding resistance, and They discovered that the resistance was low and stable, and were able to complete this invention.
したがって、この発明は、可動接点片と固定接点片を備
え、これらの接点片が内部酸化法により生成した金属酸
化物がＡｇ中に分散されている接点材料で形成されてな
る電気接点において、前記両接点片の一方が、高温硬度
特性の高い接点材料で形成されていることを特徴とする
電気接点を要旨とする。Therefore, the present invention provides an electrical contact comprising a movable contact piece and a fixed contact piece, and in which these contact pieces are formed of a contact material in which a metal oxide produced by an internal oxidation method is dispersed in Ag. The gist of the present invention is an electrical contact characterized in that one of both contact pieces is formed of a contact material with high high-temperature hardness characteristics.
この発明にかかる電気接点において、耐溶着性に優れ、
接触抵抗も低く安定なものとなる理由は、詳らかではな
いがつぎのようなことによるものと推察している。The electrical contact according to the present invention has excellent welding resistance,
The reason why the contact resistance is low and stable is not clear, but it is presumed to be due to the following reasons.
それは、湿強度係数Ａ／Ｂ値が高い材料で形成された接
点片の方は、もう一方の湿強度係数ＡＺＢ値の低い材料
で形成された接点片にくっつき難く、湿強度係数Ａ／Ｂ
値が低い方の接点片は、塑性変形を起こして、湿強度係
数Ａ／Ｂ値が高い材料で形成された接点片の方になじみ
易いのである。This is because a contact piece made of a material with a high wet strength coefficient A/B value is less likely to stick to the other contact piece made of a material with a low wet strength coefficient AZB value, and
A contact piece with a lower value undergoes plastic deformation and is easier to conform to a contact piece formed of a material with a higher wet strength coefficient A/B value.
両接点片における高温硬度特性の差は、湿強度係数Ａ／
Ｂ値で、ｌＸｌ０’〜５ＸｌＯ’の範囲にあることが好
ましい。湿強度係数Ａ／Ｂ値の差が１×１０４を下回る
と、接触抵抗の低下する程度が少な（、湿強度係数Ａ／
Ｂ値の差が５×１０４を上回ると、温強度係数が低い側
の接点片の消耗が増加する傾向が見られるからである。The difference in high temperature hardness characteristics between both contact pieces is determined by the wet strength coefficient A/
The B value is preferably in the range of lXl0' to 5XlO'. When the difference in the wet strength coefficient A/B value is less than 1 x 104, the degree of decrease in contact resistance is small (wet strength coefficient A/B).
This is because when the difference in B values exceeds 5×10 4 , there is a tendency for the contact piece on the side with a lower thermal strength coefficient to wear out more.
続いて、この発明にかかる電気接点を、具体的実施例を
参照しながら詳しく説明する。Next, the electrical contact according to the present invention will be explained in detail with reference to specific examples.
まず、含まれる酸化物の組成が異なる６種類の電気接点
１〜６を作成した。First, six types of electrical contacts 1 to 6 having different oxide compositions were created.
ＡｇＣｄ、ＡｇＣｄＳｎ、、Ａｇ５ｎＩｎの３種合金、
および、それぞれにＡＩとＭｎを添加・溶解して得た合
金インゴットを得る。各合金の組成は、第１表に示した
通りである。圧延後、酸素雰囲気中、６００℃の温度下
、１００時間加熱することにより、内部酸化処理して板
状の接点材料を得た。Three types of alloys: AgCd, AgCdSn, Ag5nIn,
Then, an alloy ingot obtained by adding and melting AI and Mn to each of them is obtained. The composition of each alloy is shown in Table 1. After rolling, internal oxidation treatment was performed by heating at a temperature of 600° C. for 100 hours in an oxygen atmosphere to obtain a plate-shaped contact material.
各接点材料から高温硬度特性測定用の試料を得て、マイ
クロビアカース高温硬度計によって、各試料の高温硬度
を測定し、この測定結果から、それぞれの温強度係数を
算出した。Samples for high-temperature hardness characteristic measurement were obtained from each contact material, and the high-temperature hardness of each sample was measured using a micro-via-curse high-temperature hardness meter, and the respective thermal strength coefficients were calculated from the measurement results.
接点材料１〜６のうち、ＡｆおよびＭｎを含むものが、
高い高温硬度特性を有している。Among contact materials 1 to 6, those containing Af and Mn are
It has high high temperature hardness properties.
接点材料１〜６により実施例と比較例の接点を作成した
。接点材料の組み合わせは、第２表の通りである。Contacts of Examples and Comparative Examples were made using Contact Materials 1 to 6. The combinations of contact materials are shown in Table 2.
実施例１〜５では、両接点片の一方は、高温硬度特性が
高い。比較例１〜４では両接点片とも同じ高温硬度特性
であり差がない。In Examples 1 to 5, one of both contact pieces had high high temperature hardness characteristics. In Comparative Examples 1 to 4, both contact pieces have the same high temperature hardness characteristics and there is no difference.
ＡＳＴＭ試験機により、耐溶着性と接触抵抗を測定した
。試験条件はつぎの通りである。Welding resistance and contact resistance were measured using an ASTM tester. The test conditions are as follows.
定常電流；１００Ｖ−２ＯＡ 突入電流；１１８Ａ 接触力；１００ｇ 解離力；１５０ｇ 開閉回数；１０．ｏｏｏ回 試料点数；各３個 試験結果は、第２表に示した通りである。Steady current: 100V-2OA Rush current: 118A Contact force: 100g Dissociation force: 150g Number of opening and closing times; 10. ooo times Number of samples: 3 each The test results are shown in Table 2.
第２表 試験結果からつぎのようなことが分かる。Table 2 The test results reveal the following.
Ａｇ−Ｃｄ０系接点材料を用いた実施例１〜４は、耐溶
着性に関しては、維持（実施例３．４）ないし向上（実
施例１．２）しており、抵抗特性に関しては、著しく向
上し約１／２程度となる。Examples 1 to 4 using Ag-Cd0-based contact materials maintained (Example 3.4) or improved (Example 1.2) welding resistance, and significantly improved resistance characteristics. It becomes about 1/2.
Ａｇ−３ｎＯ，−Ｉｎ、Ｏ，系接点材料を用いた実施例
５は、耐溶着性に関しては、維持しており、抵抗特性に
関しては、著しく向上している。Example 5 using the Ag-3nO, -In, O, system contact material maintains the welding resistance and significantly improves the resistance characteristics.
この発明は、以上の実施例に限らない。金属酸化物の種
類、組成は上記に例示した以外のものでもよい。This invention is not limited to the above embodiments. The type and composition of the metal oxide may be other than those exemplified above.
以上に述べたように、この発明にかかる電気接点は、両
接点片の一方が、高温硬度特性の高い接点材料で形成さ
れている。そのため、電気接点の特性が、耐溶着性およ
び接触抵抗特性の両方に優れたものとなる。As described above, in the electrical contact according to the present invention, one of both contact pieces is formed of a contact material with high high temperature hardness characteristics. Therefore, the characteristics of the electrical contact are excellent in both welding resistance and contact resistance characteristics.
Claims (3)
が内部酸化法により生成した金属酸化物がＡｇ中に分散
されている接点材料で形成されてなる電気接点において
、前記両接点片の一方が、高温硬度特性の高い接点材料
で形成されていることを特徴とする電気接点。(1) In an electrical contact comprising a movable contact piece and a fixed contact piece, these contact pieces are formed of a contact material in which a metal oxide produced by an internal oxidation method is dispersed in Ag, in which both the contact pieces An electrical contact characterized in that one of the contacts is made of a contact material with high high temperature hardness characteristics.
許請求の範囲第１項記載の電気接点。(2) The electrical contact according to claim 1, wherein the main component of the metal oxide is a Cd-based oxide.
酸化物である特許請求の範囲第１項記載の電気接点。(3) The main components of the metal oxide are Sn oxide and In
The electrical contact according to claim 1, which is an oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61247837A JPS63102117A (en) | 1986-10-18 | 1986-10-18 | Electric contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61247837A JPS63102117A (en) | 1986-10-18 | 1986-10-18 | Electric contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63102117A true JPS63102117A (en) | 1988-05-07 |
Family
ID=17169415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61247837A Pending JPS63102117A (en) | 1986-10-18 | 1986-10-18 | Electric contact |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63102117A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63131410A (en) * | 1986-11-19 | 1988-06-03 | 田中貴金属工業株式会社 | Electric contact |
| JPH01309220A (en) * | 1988-06-06 | 1989-12-13 | Fuji Electric Co Ltd | Electric contact |
| US5012045A (en) * | 1988-03-03 | 1991-04-30 | Sumitomo Electric Industries, Ltd. | Cable with an overall shield |
-
1986
- 1986-10-18 JP JP61247837A patent/JPS63102117A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63131410A (en) * | 1986-11-19 | 1988-06-03 | 田中貴金属工業株式会社 | Electric contact |
| US5012045A (en) * | 1988-03-03 | 1991-04-30 | Sumitomo Electric Industries, Ltd. | Cable with an overall shield |
| JPH01309220A (en) * | 1988-06-06 | 1989-12-13 | Fuji Electric Co Ltd | Electric contact |
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