JPH0236657B2 - - Google Patents
Info
- Publication number
- JPH0236657B2 JPH0236657B2 JP58090946A JP9094683A JPH0236657B2 JP H0236657 B2 JPH0236657 B2 JP H0236657B2 JP 58090946 A JP58090946 A JP 58090946A JP 9094683 A JP9094683 A JP 9094683A JP H0236657 B2 JPH0236657 B2 JP H0236657B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- resistance
- electrical contact
- contact
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 22
- 238000003466 welding Methods 0.000 description 11
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
- H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
- H01H1/02374—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te containing as major component CdO
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Manufacture Of Switches (AREA)
- Contacts (AREA)
- Conductive Materials (AREA)
Description
本発明は、電気接点材料に係り、特にAg−
CdOより成る電気接点材料の改良に関する。
Ag−CdOより成る電気接点材料は、アークに
よる消耗が大きく、耐アーク性、耐消耗性に劣る
ため耐電圧特性及び絶縁抵抗が劣化するが、耐溶
着性に優れ、接触抵抗が安定している為、広く多
用されている。
昨今、継電器の小型化に伴い接触力、開離力の
低下、接点の小型化、接点ギヤツプの狭小化傾向
が進んでいる。この為、優れた耐溶着性、安定し
た接触抵抗を有し、且つ耐アーク性、耐消耗性に
優れた電気接点材が要望されている。
本発明は斯かる要望を満たすべく鋭意攻究の結
果、Ag−CdOより成る電気接点材料の優れた耐
溶着性、安定した接触抵抗をそのまま具有し、耐
アーク性、耐消耗性が大幅に向上した電気接点材
料を見い出したものである。
本発明の電気接点材料の1つは、Cd10〜20重
量%、In0.5〜5重量%、Cu0.5〜5重量%、
Bi0.1〜3重量%、残部Agより成り、且つ内部酸
化されているものである。
本発明の電気接点材料の他の一つは、Cd10〜
20重量%、In0.5〜5重量%、Cu0.5〜5重量%、
Bi0.1〜3重量%、Fe族元素0.01〜0.5重量%、残
部Agより成り、且つ内部酸化されているもので
ある。
これら本発明の電気接点材料に於いて、その成
分組成を上記の如く限定した理由について説明す
ると、Cdは周知の如く優れた耐溶着性と安定し
た接触抵抗を保持するのに必要で、10重量%未満
では良好な耐溶着性が得られず、20重量%を超え
ると耐消耗性を向上させる元素が添加されていて
も耐消耗性が劣化するので、10〜20重量%が好適
である。Inは耐アーク性、耐消耗性の向上に必要
で、0.5重量%未満ではその効果が無く、5重量
%を超えると接点開閉時にInの酸化物が凝集し、
接触抵抗及び温度上昇値が高くなり、後述のBi
の添加では抑えきれなくなるので、0.5〜5重量
%が好適である。Cuは酸化粒子を微細化させ電
気伝導度、耐溶着性の向上に必要で、0.5重量%
未満ではその効果がなく、5重量%を超えると耐
溶着性が劣化するので、0.5〜5重量%が好適で
ある。Biは接点開閉時にInの酸化物が凝集し、
接触抵抗及び温度上昇値が高くなるのを防ぐ為に
必要で、0.1重量%未満ではその効果が無く、3
重量%を超えると合金の融点を極端に低下させ、
高温での内部酸化が不可能となるので、0.1〜3
重量%が好適である。Fe族元素は耐アーク性、
耐消耗性をより一層向上させる為に添加するもの
で、0.01重量%未満ではその効果が無く、0.5重
量%を超えると接触抵抗が高く不安定となるの
で、0.01〜0.5重量%が好適である。
次に本発明による電気接点材料と従来の電気接
点材料にて作つた電気接点について説明する。
下記の表の左欄に示す成分組成の粉粒体を内部
酸化した後、圧縮、焼結、押出、引抜等の工程を
経て得た実施例1〜7の電気接点材料と従来例
1、2の電気接点材料にて作つた直径5mm、厚さ
1mmの固定接点と直径4mm、厚さ1.1mm、5Rの可
動接点とを対向させて、下記の試験条件にて接点
開閉試験を行つた処、下記の表の右欄に示すよう
な結果を得た。
試験条件
電 圧:AC100V 50Hz
電 流:投入40A、定常10A
負 荷:抵抗
開閉頻度:20回/分
開閉回数:溶着発生迄
接触力:40g
開離力:45g
The present invention relates to electrical contact materials, particularly Ag-
Concerning improvements in electrical contact materials made of CdO. Electrical contact materials made of Ag-CdO are subject to large amounts of wear due to arcing, and have poor arc resistance and wear resistance, resulting in deterioration of withstand voltage characteristics and insulation resistance. However, they have excellent welding resistance and stable contact resistance. Therefore, it is widely used. In recent years, as relays have become smaller, there has been a trend toward lower contact and separation forces, smaller contacts, and narrower contact gaps. For this reason, there is a demand for electrical contact materials that have excellent welding resistance, stable contact resistance, and excellent arc resistance and wear resistance. As a result of intensive research to meet such demands, the present invention has achieved the excellent welding resistance and stable contact resistance of the electrical contact material made of Ag-CdO, and has significantly improved arc resistance and wear resistance. We have discovered a new electrical contact material. One of the electrical contact materials of the present invention includes 10 to 20% by weight of Cd, 0.5 to 5% by weight of In, 0.5 to 5% by weight of Cu,
It consists of 0.1 to 3% by weight of Bi and the balance is Ag, and is internally oxidized. Another electrical contact material of the present invention is Cd10~
20% by weight, In0.5-5% by weight, Cu0.5-5% by weight,
It consists of 0.1 to 3% by weight of Bi, 0.01 to 0.5% by weight of Fe group elements, and the balance is Ag, and is internally oxidized. The reason why the component composition of the electrical contact materials of the present invention is limited as described above is as follows.As is well known, Cd is necessary to maintain excellent welding resistance and stable contact resistance. If it is less than 20% by weight, good welding resistance cannot be obtained, and if it exceeds 20% by weight, the abrasion resistance deteriorates even if an element that improves the abrasion resistance is added, so 10 to 20% by weight is suitable. In is necessary to improve arc resistance and wear resistance, and if it is less than 0.5% by weight, it has no effect, and if it exceeds 5% by weight, In oxides will aggregate during contact opening and closing.
The contact resistance and temperature rise value become high, and Bi
0.5 to 5% by weight is suitable. Cu is necessary to refine the oxide particles and improve electrical conductivity and welding resistance, and is 0.5% by weight.
If it is less than 5% by weight, there is no effect, and if it exceeds 5% by weight, the welding resistance deteriorates, so 0.5 to 5% by weight is suitable. In Bi, In oxide aggregates when the contact opens and closes,
It is necessary to prevent contact resistance and temperature rise from increasing, and if it is less than 0.1% by weight, it will not have that effect, and 3
Exceeding % by weight will drastically lower the melting point of the alloy,
0.1 to 3 as internal oxidation becomes impossible at high temperatures.
% by weight is preferred. Fe group elements have arc resistance,
It is added to further improve the abrasion resistance. If it is less than 0.01% by weight, it has no effect, and if it exceeds 0.5%, the contact resistance becomes high and unstable, so 0.01 to 0.5% by weight is suitable. . Next, electrical contacts made using the electrical contact material according to the present invention and the conventional electrical contact material will be explained. Electrical contact materials of Examples 1 to 7 and Conventional Examples 1 and 2 obtained by internally oxidizing powders and granules having the composition shown in the left column of the table below, and then undergoing processes such as compression, sintering, extrusion, and drawing. A contact opening/closing test was conducted under the following test conditions by placing a fixed contact of 5 mm in diameter and 1 mm in thickness and a movable contact of 4 mm in diameter, 1.1 mm in thickness, and 5R made of electrical contact material facing each other. The results shown in the right column of the table below were obtained. Test conditions Voltage: AC100V 50Hz Current: 40A input, 10A steady load: Resistance Switching frequency: 20 times/min Number of switches: Contact force until welding occurs: 40g Breaking force: 45g
【表】
上記の表の右欄に示す数値で明らかなように実
施例1〜7の電気接点材料より成る電気接点は、
従来例1、2の電気接点材料より成る電気接点と
溶着発生迄の開閉回数が近似していて、同等に耐
溶着性に優れ、また接触抵抗も同等に低く且つば
らつきが少なくて安定していることが判る。そし
てアーク消耗量については、実施例1〜7の電気
接点材料より成る電気接点は、従来例1、2の電
気接点材料より成る電気接点よりも遥かに少なく
耐アーク性、耐消耗性が優れていることが判る。
以上の説明で判るように本発明の電気接点材料
は、従来のAg−CdOより成る電気接点材料と同
等の優れた耐溶着性と安定した接触抵抗を有し、
その上耐アーク性、耐消耗性については格段に向
上しているので、従来のAg−CdOより成る電気
接点材料にとつて代わることのできる画期的なも
のと云える。[Table] As is clear from the values shown in the right column of the table above, the electrical contacts made of the electrical contact materials of Examples 1 to 7 are as follows:
The number of openings and closings before welding occurs is similar to the electrical contacts made of the electrical contact materials of Conventional Examples 1 and 2, and the welding resistance is equally excellent, and the contact resistance is equally low and stable with little variation. I understand that. As for the amount of arc wear, the electrical contacts made of the electrical contact materials of Examples 1 to 7 have far less arc wear than the electrical contacts made of the electrical contact materials of Conventional Examples 1 and 2, and have excellent arc resistance and wear resistance. I know that there is. As can be seen from the above description, the electrical contact material of the present invention has excellent welding resistance and stable contact resistance equivalent to the conventional electrical contact material made of Ag-CdO,
Furthermore, the arc resistance and abrasion resistance are significantly improved, so it can be said to be an epoch-making product that can replace the conventional electrical contact material made of Ag-CdO.
Claims (1)
5重量%、Bi0.1〜3重量%、残部Agより成り、
且つ内部酸化されている電気接点材料。 2 Cd10〜20重量%、In0.5〜5重量%、Cu0.5〜
5重量%、Bi0.1〜3重量%、Fe族元素0.01〜0.5
重量%、残部Agより成り、且つ内部酸化されて
いる電気接点材料。[Claims] 1 Cd 10-20% by weight, In 0.5-5% by weight, Cu 0.5-
Consists of 5% by weight, 0.1 to 3% by weight Bi, and the balance Ag.
and electrical contact materials that are internally oxidized. 2 Cd10~20wt%, In0.5~5wt%, Cu0.5~
5% by weight, Bi0.1-3% by weight, Fe group elements 0.01-0.5
Electrical contact material consisting of % by weight, balance Ag, and internally oxidized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58090946A JPS59219435A (en) | 1983-05-24 | 1983-05-24 | Electrical contact material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58090946A JPS59219435A (en) | 1983-05-24 | 1983-05-24 | Electrical contact material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59219435A JPS59219435A (en) | 1984-12-10 |
JPH0236657B2 true JPH0236657B2 (en) | 1990-08-20 |
Family
ID=14012627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58090946A Granted JPS59219435A (en) | 1983-05-24 | 1983-05-24 | Electrical contact material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59219435A (en) |
-
1983
- 1983-05-24 JP JP58090946A patent/JPS59219435A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS59219435A (en) | 1984-12-10 |
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