JPH0525503A - Electric contact material and production of the same - Google Patents
Electric contact material and production of the sameInfo
- Publication number
- JPH0525503A JPH0525503A JP3203898A JP20389891A JPH0525503A JP H0525503 A JPH0525503 A JP H0525503A JP 3203898 A JP3203898 A JP 3203898A JP 20389891 A JP20389891 A JP 20389891A JP H0525503 A JPH0525503 A JP H0525503A
- Authority
- JP
- Japan
- Prior art keywords
- contact material
- ceramic particles
- electric contact
- sno
- mixed
- 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 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 35
- 238000009792 diffusion process Methods 0.000 claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 48
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 23
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract 8
- 239000000203 mixture Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 238000009702 powder compression Methods 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
Landscapes
- Contacts (AREA)
- Ceramic Products (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、リレー、スイッチ等に
用いる電気接点の素材である電気接点材料とその製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric contact material which is a material of an electric contact used for a relay, a switch and the like and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来よりＡｇ中にＷＣやＳｎＯ2 の粒子
を分散させた電気接点材料は、硬度、耐アーク性に優れ
ていることが知られている。ところで、この電気接点材
料は、ＷＣ粒子やＳｎＯ2 粒子の分散の為に、焼結によ
る緻密化が阻害されると共に焼結後ＷＣ粒子やＳｎＯ2
粒子とＡｇとは化学的に結合していない為、例えばＷＣ
粒子やＳｎＯ2 粒子が接点表面に現れると、表面よりＷ
Ｃ粒子やＳｎＯ2 粒子が脱落するものである。従って、
リレー、スイッチ等の電気接点を製作すると、耐摩耗性
が悪いため、十分な接点寿命のものが得られなかった。 2. Description of the Related Art It has been conventionally known that an electrical contact material in which particles of WC and SnO 2 are dispersed in Ag is excellent in hardness and arc resistance. Meanwhile, the electrical contact material, WC particles or for dispersion of SnO 2 particles, after sintering WC particles and SnO 2 with densification by sintering is inhibited
Since the particles and Ag are not chemically bonded, for example, WC
When particles or SnO 2 particles appear on the contact surface, W
C particles and SnO 2 particles fall off. Therefore,
When electrical contacts such as relays and switches were manufactured, wear resistance was poor, and therefore, sufficient contact life could not be obtained.
【０００３】[0003]
【発明が解決しようとする課題】そこで本発明は、Ａｇ
中にＷＣ粒子やＳｎＯ2 粒子を分散させても焼結による
緻密化が阻害されず、また表面よりＷＣ粒子やＳｎＯ2
粒子が脱落せず、硬度、耐アーク性は勿論のこと、十分
実用に耐え得る低摩耗性の電気接点材料及びその製造方
法を提供しようとするものである。Therefore, according to the present invention, the Ag
WC particles and even when the SnO 2 particles are dispersed without being inhibited densification by sintering, also WC particles and SnO 2 from the surface during
It is an object of the present invention to provide an electrical contact material which does not drop off particles, has not only hardness and arc resistance, but also has sufficient wear resistance and low abrasion, and a method for producing the same.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
の本発明の電気接点材料は、 0.1〜20重量％のＷＣ又は
ＳｎＯ2 のセラミック粒子が0.01〜２重量％のバインダ
ーとしてのＴｉの拡散層に被覆された上、残部のＡｇと
混合焼結されてなるものである。The electrical contact material of the present invention for solving the above-mentioned problems comprises 0.1 to 20% by weight of WC or SnO 2 ceramic particles and 0.01 to 2 % by weight of Ti as a binder. In addition to being coated on the layer, it is mixed and sintered with the balance Ag.
【０００５】この電気接点材料を作る本発明の製造方法
は、ＷＣ又はＳｎＯ2 のセラミック粒子とバインダーと
してのＴｉを混合した後 800〜1000℃で30分以上の拡散
処理を行ってセラミック粒子の表面にＴｉ拡散層を形成
し、次いでＡｇと混合した後700〜 950℃で30分以上焼
結処理を行うことを特徴とするものである。According to the manufacturing method of the present invention for producing this electrical contact material, ceramic particles of WC or SnO 2 and Ti as a binder are mixed and then subjected to a diffusion treatment at 800 to 1000 ° C. for 30 minutes or more to obtain the surface of the ceramic particles. A Ti diffusion layer is formed on the above, then mixed with Ag, and then sintered at 700 to 950 ° C. for 30 minutes or more.
【０００６】上記本発明の電気接点材料に於いて、ＷＣ
又はＳｎＯ2 のセラミック粒子の含有量を 0.1〜20重量
％とした理由は、 0.1重量％未満では硬度が高くなら
ず、耐アーク性の改善が見られず、20重量％を超える
と、加工性が低下することは勿論のこと、耐消耗性が著
しく悪くなるからである。尚ＷＣ又はＳｎＯ2 のセラミ
ック粒子は、粒度が２μｍ以下の微細な粒子が好まし
い。In the above electric contact material of the present invention, WC
Or, the reason why the content of the SnO 2 ceramic particles is 0.1 to 20% by weight is that the hardness is not high and the arc resistance is not improved when the content is less than 0.1% by weight, and the workability is increased when the content exceeds 20% by weight. This is because, of course, the wear resistance is significantly deteriorated. The ceramic particles of WC or SnO 2 are preferably fine particles having a particle size of 2 μm or less.
【０００７】またバインダーとしてのＴｉの含有量を0.
01〜２重量％とした理由は、ＷＣまたはＳｎＯ2 のセラ
ミック粒子の1/10程度の含有量で、ＷＣのセラミック粒
子とＡｇとがＡｇ−Ｔｉ−Ｃ−Ｗ結合により、ＳｎＯ2
のセラミック粒子とＡｇとがＡｇ−Ｔｉ−Ｏ−Ｓｎ結合
により化学的に強固に密着され、例え接点表面にＷＣま
たはＳｎＯ2 のセラミック粒子が現れてもセラミック粒
子が接点表面から脱落することがないからである。Further, the content of Ti as a binder is set to 0.
The reason for setting it to 01 to 2% by weight is that the content of the ceramic particles of WC or SnO 2 is about 1/10, and the ceramic particles of WC and Ag are bonded to each other by Ag—Ti—C—W bonding, resulting in SnO 2
The ceramic particles and Ag are chemically firmly adhered by Ag-Ti-O-Sn bond, the ceramic particles can appear ceramic particles of the WC or SnO 2 is the contact surface even does not fall off from the contact surface of the Because.
【０００８】[0008]
【作用】上記本発明の電気接点材料は、ＷＣやＳｎＯ2
のセラミック粒子とＡｇとがＴｉの拡散層によるＡｇ−
Ｔｉ−Ｃ−Ｗ結合やＡｇ−Ｔｉ−Ｏ−Ｓｎ結合により化
学的に強固に密着されているので、これにより製作した
電気接点はリレー、スイッチ等に使用した際、硬度、耐
アーク性に優れることは勿論のこと、接点表面にＷＣや
ＳｎＯ2 のセラミック粒子が現れても、これらのセラミ
ック粒子は接点表面から脱落することが少なく、従って
耐摩耗性が向上し、接点寿命が増長する。The above-mentioned electrical contact material of the present invention is WC or SnO 2
Of the ceramic particles of Ag and Ag by the diffusion layer of Ti−
The Ti-C-W bond and the Ag-Ti-O-Sn bond firmly adhere to each other chemically, so the electrical contact produced by this is excellent in hardness and arc resistance when used in relays, switches, etc. Needless to say, even if WC or SnO 2 ceramic particles appear on the contact surface, these ceramic particles rarely fall off from the contact surface, and therefore wear resistance is improved and contact life is extended.
【０００９】また上記本発明の電気接点材料の製造方法
は、ＷＣやＳｎＯ2 のセラミック粒子とＴｉとを混合
し、拡散処理を行ってセラミック粒子の表面にＴｉ拡散
層を形成するので、セラミック粒子そのものは表面が被
われる。従って、その後Ａｇと混合し、焼結処理を行う
と、セラミック粒子とＡｇとの焼結性が向上し、Ｔｉ拡
散層を介して化学的に強固に結合されて、上記の耐摩耗
性に優れた電気接点材料が容易に得られる。Further, in the method for producing an electric contact material of the present invention, the ceramic particles of WC or SnO 2 and Ti are mixed and subjected to diffusion treatment to form a Ti diffusion layer on the surface of the ceramic particles. Its surface is covered. Therefore, if mixed with Ag and then subjected to a sintering treatment, the sinterability between the ceramic particles and Ag is improved, and the ceramic particles are chemically and strongly bonded through the Ti diffusion layer, resulting in excellent wear resistance. Electrical contact materials can be easily obtained.
【００１０】[0010]
【実施例】本発明の電気接点材料及びその製造方法の一
実施例を説明する。表１に示す重量％のＷＣのセラミッ
ク粒子と該セラミック粒子の1/10の重量％のＴｉをＶ型
混合機で１時間混合後、 850℃で１時間拡散処理を行っ
た。次に表１に示す重量％のＡｇを混ぜてＶ型混合機で
１時間混合した後、粉末冶金法にしたがって、粉末の圧
縮成型と 850℃で４時間の焼結処理を繰り返し行い、ビ
レットの電気接点材料を作成した。そしてこの電気接点
材料を熱間押出し、伸線加工、ヘッダー加工を経て頭部
径５mm、頭部高さ１mm、脚部径 2.5mm、脚部長さ2.5mm
のリベット型固定接点と、頭部径４mm、頭部高さ 1.1m
m、脚部径 2.8mm、脚部長さ 1.6mm、頭部上面が５mmＲ
の球面のリベット型可動接点を得た。そしてこれらをヒ
ンジ型リレーに組み込み、下記の試験条件にて消耗試験
を行った処、図１のグラフの実線に示すような結果を得
た。EXAMPLE An example of the electrical contact material and the method for producing the same of the present invention will be described. The WC ceramic particles of weight% shown in Table 1 and Ti of 1/10 weight% of the ceramic particles were mixed in a V-type mixer for 1 hour, and then diffused at 850 ° C. for 1 hour. Next, after mixing Ag of the weight% shown in Table 1 and mixing for 1 hour with a V-type mixer, according to the powder metallurgy method, powder compression molding and sintering treatment at 850 ° C. for 4 hours were repeated, and the billet An electrical contact material was created. Then, this electrical contact material is hot extruded, wire-drawn and header processed, then head diameter 5 mm, head height 1 mm, leg diameter 2.5 mm, leg length 2.5 mm
Rivet type fixed contact, head diameter 4mm, head height 1.1m
m, leg diameter 2.8mm, leg length 1.6mm, head top 5mmR
We obtained a spherical rivet type movable contact. Then, these were incorporated into a hinge type relay, and a wear test was performed under the following test conditions, and the results shown by the solid line in the graph of FIG. 1 were obtained.
【００１１】一方、従来例は、Ｔｉを用いないで表１に
重量％のＷＣのセラミック粒子とＡｇとをＶ型混合機で
１時間混合した後、粉末冶金法にしたがって粉末の圧縮
成型と 850℃で４時間の焼結処理を繰り返し行い、ビレ
ットの電気接点材料を作成した。この電気接点材料から
上記実施例と同一寸法のリベット型固定接点とリベット
型可動接点を製作し、ヒンジ型リレーに組み込み、下記
の試験条件にて消耗試験を行った処、図１のグラフの点
線に示すような結果を得た。
試験条件
電 圧 ： AC 100Ｖ、50Hz
電 流 ： 定常10Ａ
負 荷 ： 抵抗
開閉頻度： 20回／分
開閉回数： １万回
接触力 ： 40ｇ
試験台数： ３台On the other hand, in the conventional example, without using Ti, the ceramic particles of WC and Ag in Table 1 were mixed by weight in the V-type mixer for 1 hour in Table 1, and then powder compression molding was performed according to the powder metallurgy method. The sintering treatment was repeated at 4 ° C. for 4 hours to prepare a billet electrical contact material. A rivet-type fixed contact and a rivet-type movable contact having the same dimensions as those of the above-described embodiment were manufactured from this electric contact material, and the rivet-type movable contact was incorporated into a hinge-type relay, and a wear test was performed under the following test conditions. The results shown in are obtained. Test conditions Voltage: AC 100V, 50Hz Current: Steady 10A Load: Resistance switching frequency: 20 times / minute Switching frequency: 10,000 times Contact force: 40g Number of tests: 3 units
【００１２】[0012]
【表１】 [Table 1]
【００１３】図１のグラフで明らかなように実施例の電
気接点材料から製作した電気接点は、従来例の電気接点
材料から製作した電気接点に比べ、消耗量が著しく少な
く、耐摩耗性に優れていることが判る。As is apparent from the graph of FIG. 1, the electrical contact made from the electrical contact material of the embodiment has a significantly smaller amount of wear and is superior in wear resistance as compared with the electrical contact made from the conventional electrical contact material. You can see that
【００１４】次に本発明の電気接点材料及びその製造方
法の他の実施例を説明する。表２に示す重量％のＳｎＯ
2 のセラミック粒子と該セラミック粒子の1/10の重量％
のＴｉをＶ型混合機で１時間混合後、 850℃で１時間拡
散処理を行った。次に表２に示す重量％のＡｇを混ぜて
Ｖ型混合機で１時間混合した後、粉末冶金法にしたがっ
て、粉末の圧縮成型と 850℃で４時間の焼結処理を繰り
返し行い、ビレットの電気接点材料を作成した。そして
この電気接点材料から前記実施例と同一寸法のリベット
型固定接点とリベット型可動接点を製作し、ヒンジ型リ
レーに組み込み、前記実施例と同じ試験条件で消耗試験
を行った処、図２のグラフの実線に示すような結果を得
た。Next, another embodiment of the electric contact material and the method for producing the same of the present invention will be described. Wt% SnO shown in Table 2
2 ceramic particles and 1/10% by weight of the ceramic particles
After Ti was mixed in a V-type mixer for 1 hour, diffusion treatment was performed at 850 ° C. for 1 hour. Next, after mixing Ag of the weight% shown in Table 2 and mixing for 1 hour with a V-type mixer, according to the powder metallurgical method, powder compression molding and sintering treatment at 850 ° C. for 4 hours were repeatedly performed to obtain a billet. An electrical contact material was created. Then, a rivet type fixed contact and a rivet type movable contact having the same dimensions as those of the above-mentioned embodiment were manufactured from this electric contact material, and were incorporated into a hinge type relay, and a wear test was conducted under the same test conditions as those of the above-mentioned embodiment. The result shown in the solid line of the graph was obtained.
【００１５】一方、従来例は、Ｔｉを用いないで表２に
示す重量％のＳｎＯ2 のセラミック粒子とＡｇとをＶ型
混合機で１時間混合した後、粉末冶金法にしたがって粉
末の圧縮成型と 850℃で４時間の焼結処理を繰り返し行
い、ビレットの電気接点材料を作成した。そしてこの電
気接点材料から前記実施例と同一寸法のリベット型固定
接点とリベット型可動接点を製作し、ヒンジ型リレーに
組み込み、前記実施例と同じ試験条件で消耗試験を行っ
た処、図２のグラフの点線に示すような結果を得た。Meanwhile, conventional example, after mixing 1 hour and Ag wt.% SnO 2 ceramic particles shown in Table 2 without using a Ti a V-type mixer, compression molding of the powder according to powder metallurgy By repeating the sintering treatment at 850 ° C. for 4 hours, a billet electric contact material was prepared. Then, a rivet type fixed contact and a rivet type movable contact having the same dimensions as those of the above-mentioned embodiment were manufactured from this electric contact material, and were incorporated into a hinge type relay, and a wear test was conducted under the same test conditions as those of the above-mentioned embodiment. The results shown in the dotted line of the graph were obtained.
【００１６】[0016]
【表２】 [Table 2]
【００１７】図２のグラフで明らかなように実施例の電
気接点材料から製作した電気接点は、従来例の電気接点
材料から製作した電気接点に比べ、消耗量が著しく少な
く、耐摩耗性に優れていることが判る。As is apparent from the graph of FIG. 2, the electrical contact made of the electrical contact material of the embodiment has a significantly smaller amount of wear and excellent wear resistance as compared with the electrical contact made of the conventional electrical contact material. You can see that
【００１８】[0018]
【発明の効果】以上の通り本発明の電気接点材料は、Ｗ
ＣやＳｎＯ2 のセラミック粒子とＡｇとがＴｉの拡散層
によるＡｇ−Ｔｉ−Ｃ−Ｗ結合やＡｇ−Ｔｉ−Ｏ−Ｓｎ
結合により化学的に強固密着されているので、これによ
り製作した電気接点は使用中硬度、耐アーク性に優れる
ことは勿論、接点表面にＷＣやＳｎＯ2 のセラミック粒
子が現れても、これらのセラミック粒子が接点表面から
脱落することが少なく、従って耐摩耗性に優れ、接点寿
命が増長する。また本発明の電気接点材料の製造方法
は、ＷＣやＳｎＯ2 のセラミック粒子とＴｉとを混合
し、拡散処理を行ってセラミック粒子の表面にＴｉ拡散
層を形成するので、セラミック粒子そのものは表面が被
われる。従ってその後Ａｇと混合し、焼結処理を行った
際セラミック粒子とＡｇとの焼結性が向上し、Ｔｉ拡散
層を介して化学的に強固に結合されて、耐摩耗性に優れ
た上記の電気接点材料が容易に得られる。As described above, the electric contact material of the present invention is W
C or SnO 2 ceramic particles and Ag are Ag-Ti-C-W bonds or Ag-Ti-O-Sn due to Ti diffusion layer.
Since it is chemically and firmly adhered by bonding, the electric contact produced by this has excellent hardness and arc resistance during use, and even if WC or SnO 2 ceramic particles appear on the contact surface, these ceramics Particles rarely fall off the surface of the contact, and therefore have excellent wear resistance and prolong contact life. Further, in the method for producing an electrical contact material of the present invention, since ceramic particles of WC or SnO 2 and Ti are mixed and a diffusion treatment is performed to form a Ti diffusion layer on the surface of the ceramic particles, the surface of the ceramic particles themselves is Be covered. Therefore, when mixed with Ag and then subjected to a sintering treatment, the sinterability of the ceramic particles and Ag is improved, and the ceramic particles are chemically and strongly bonded through the Ti diffusion layer, and thus the above-mentioned abrasion resistance is excellent. Electrical contact materials are easily obtained.
【図１】本発明の電気接点材料の一実施例により製作し
た電気接点とこれに対応する従来の電気接点材料により
製作した電気接点の消耗試験の結果を示すグラフであ
る。FIG. 1 is a graph showing a result of a wear test of an electric contact manufactured by an embodiment of the electric contact material of the present invention and an electric contact manufactured by a conventional electric contact material corresponding thereto.
【図２】本発明の電気接点材料の他の実施例により製作
した電気接点とこれに対応する従来の電気接点材料によ
り製作した電気接点の消耗試験の結果を示すグラフであ
る。FIG. 2 is a graph showing the results of a wear test of an electric contact manufactured by another embodiment of the electric contact material of the present invention and an electric contact manufactured by a conventional electric contact material corresponding thereto.
Claims (2)
ラミック粒子が0.01〜２重量％のバインダーとしてのＴ
ｉの拡散層に被覆された上、残部のＡｇと混合焼結され
てなる電気接点材料。1. 0.1 to 20% by weight of WC or SnO 2 ceramic particles 0.01 to 2 % by weight of T as a binder.
An electric contact material which is coated with the diffusion layer of i and is mixed and sintered with the balance Ag.
インダーとしてのＴｉを混合し、次に 800〜1000℃で30
分以上の拡散処理を行ってセラミック粒子の表面にＴｉ
拡散層を形成し、次いでＡｇと混合し 700〜 950℃で30
分以上焼結処理を行うことを特徴とする電気接点材料の
製造方法。2. Mixing ceramic particles of WC or SnO 2 with Ti as a binder, and then mixing at 800 to 1000 ° C. for 30 minutes.
Over the surface of the ceramic particles by applying diffusion treatment
Diffusion layer is formed, then mixed with Ag and heated at 700-950 ℃ for 30
A method for producing an electrical contact material, which comprises performing a sintering treatment for not less than a minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3203898A JPH0525503A (en) | 1991-07-18 | 1991-07-18 | Electric contact material and production of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3203898A JPH0525503A (en) | 1991-07-18 | 1991-07-18 | Electric contact material and production of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0525503A true JPH0525503A (en) | 1993-02-02 |
Family
ID=16481545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3203898A Pending JPH0525503A (en) | 1991-07-18 | 1991-07-18 | Electric contact material and production of the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0525503A (en) |
-
1991
- 1991-07-18 JP JP3203898A patent/JPH0525503A/en active Pending
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