JPS6049705B2 - Method for manufacturing silver-tin oxide electrical contact material - Google Patents
Method for manufacturing silver-tin oxide electrical contact materialInfo
- Publication number
- JPS6049705B2 JPS6049705B2 JP52015943A JP1594377A JPS6049705B2 JP S6049705 B2 JPS6049705 B2 JP S6049705B2 JP 52015943 A JP52015943 A JP 52015943A JP 1594377 A JP1594377 A JP 1594377A JP S6049705 B2 JPS6049705 B2 JP S6049705B2
- Authority
- JP
- Japan
- Prior art keywords
- electrical contact
- contact material
- silver
- tin oxide
- oxide 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
Landscapes
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Manufacture Of Switches (AREA)
- Contacts (AREA)
- Conductive Materials (AREA)
Description
【発明の詳細な説明】
本発明は、内部酸化法によつて製造される銀−酸化す
ずの電気接点材料の製造方法に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a silver-tin oxide electrical contact material produced by an internal oxidation method.
従来より比較的小電流のリレーから大電流域のマグネ
ットスイッチやノーヒユーズブレーカーなどに広汎に用
いられてきた銀−酸化カドミウム系電気接点材料は、よ
り一層の性能向上の為種々の改良がなされ、材料面、製
造技術面共に極限にまで達せられ、電気接点材料として
の性能特に耐溶着性、耐消耗性はこの系の限界にまで高
められたと言える。 このようなことから近時、銀−酸
化カドミウム系以外の銀−酸化物系て耐溶着性、耐消耗
性共により優れた電気接点材料の出現が強く要望されて
いる。Silver-cadmium oxide electrical contact materials, which have been widely used in applications ranging from relatively small current relays to large current range magnetic switches and no-fuse breakers, have undergone various improvements to further improve their performance. It can be said that both the material and manufacturing technology have been pushed to the limit, and the performance as an electrical contact material, particularly the welding resistance and abrasion resistance, has been improved to the limits of this system. For these reasons, there has recently been a strong demand for an electrical contact material based on a silver-oxide system other than a silver-cadmium oxide system that has better welding resistance and wear resistance.
そこで、本発明者はかかる要望を満たさんが為に、銀
−酸化カドミウム系電気接点材料よりも優れた性能を有
する電気接点材料を開発すべく鋭意攻究の結果、満足で
きる電気接点材料として銀−酸化すすの電気接点材料の
製造方法を見い出したものである。Therefore, in order to satisfy such a demand, the present inventor has made an earnest effort to develop an electrical contact material that has better performance than the silver-cadmium oxide based electrical contact material. - We have discovered a method for producing electrical contact materials made of oxidized soot.
本発明による銀−酸化すす電気接点材料の製造方法は
、銀中に重量比て２〜１５％の金属すすを溶解してなる
二元合金を、酸化性雰囲気中において２５０〜６００℃
で内部酸化せしめるものである。The method for producing a silver-soot oxide electrical contact material according to the present invention involves heating a binary alloy formed by dissolving 2 to 15% by weight of metallic soot in silver at 250 to 600°C in an oxidizing atmosphere.
It causes internal oxidation.
本発明の製造方法に於いて、上述の如く銀−すす合金
の組成範囲を限定した理由は、すすが２重量％未満では
優れた耐溶着性を得ることができなく、１５重量％を超
えると内部酸化が困難となるからである。 また内部酸
化温度範囲を上述の如く限定した理由は、内部酸化温度
が２５０℃未満では内部酸化の進行が極めて遅いので生
産性が悪く、６００℃を超えると、すずの添加量が少い
場合内部組織が乱れた波形の層状組織となり且つその各
層の境界に酸化すずが多く析出し、すずの添加量が多い
場合材料の表面附近に酸化すずの厚い被覆が形成されて
、結局いずれの場合も酸化すずが材料全体に於いて均一
に分散せず、従つて十分な耐溶着性、耐消耗性が得られ
ないからである。In the production method of the present invention, the reason why the composition range of the silver-soot alloy is limited as described above is that if the soot content is less than 2% by weight, excellent welding resistance cannot be obtained, and if the soot content exceeds 15% by weight, This is because internal oxidation becomes difficult. The reason why the internal oxidation temperature range is limited as mentioned above is that if the internal oxidation temperature is less than 250°C, the progress of internal oxidation is extremely slow, resulting in poor productivity; if it exceeds 600°C, the internal structure The material becomes a layered structure with a disordered wave shape, and a large amount of tin oxide precipitates at the boundaries of each layer.If the amount of tin added is large, a thick coating of tin oxide is formed near the surface of the material, and in either case, the tin oxide becomes a layered structure in the material. This is because it is not uniformly dispersed throughout, and therefore sufficient welding resistance and abrasion resistance cannot be obtained.
次に本発明の銀一酸化すず電気接点材料の製造の効果
を明瞭ならしめる為、その具体的な実施例、比較例及び
従来例についての比較試験とその結果について述べる。Next, in order to clarify the effects of manufacturing the silver tin monoxide electrical contact material of the present invention, comparative tests and results will be described for specific examples, comparative examples, and conventional examples.
下表の左欄に示すＮ０、、１〜Ｎｏ、、３が本発明に
よる具体的な実施例であり、Ｎｏ、、４が７５０℃で内
部酸化した比較例であり、Ｎｏ、、５が銀−酸化カドミ
ウム系の従来例である。これらは溶解鋳造した後、圧延
加工にて１．５ＴｆＵｎ厚の板になし、次いで６φ−に
プレスで打ち抜き、９気圧の酸素雰囲気中で内部酸化し
たものである。然してこれらＮＯ．ｌ〜ＮＯ．５に示す
接点材料を下記の試験条件にて比較試験を行なつたとこ
ろ、下表の右欄に示すような結果を得た。Nos. 0, 1 to 3 shown in the left column of the table below are specific examples according to the present invention, Nos. 4 are comparative examples internally oxidized at 750°C, and Nos. 5 are silver -This is a conventional example of cadmium oxide. These were melted and cast, then rolled into a plate with a thickness of 1.5 TfUn, then punched out to a size of 6φ by a press, and internally oxidized in an oxygen atmosphere at 9 atmospheres. However, these NO. l~NO. A comparative test was conducted on the contact material shown in No. 5 under the following test conditions, and the results shown in the right column of the table below were obtained.
＊試験条件：改造Ｎ．Ｆ．Ｂによる溶
着及び消耗試験電流：２４００Ａ電圧：ＡＣｌｌＯＶ試
験回数：２０回投入、遮断
接点寸法：６φ？×１．５ｔ瓢
上記表の右欄に示す数値で明らかなように本発明の製造
方法によつて得られた銀一酸化すず電気接点材料は、高
温で内部酸化した銀一酸化すす電気接点材料はもとより
、従来の銀一酸化カドミウム系の電気接点材料に比し、
溶着発生回数が著しく少なく消耗性も減少していて耐溶
着性、耐消耗性共に優れている。*Test conditions: Modified N. F. Welding and consumption test by B Current: 2400A Voltage: ACllOV Test number: 20 times, cutoff contact size: 6φ? x 1.5 tons As is clear from the values shown in the right column of the above table, the silver monoxide soot electrical contact material obtained by the manufacturing method of the present invention is a silver monoxide soot electrical contact material internally oxidized at high temperature. Of course, compared to conventional silver cadmium monoxide-based electrical contact materials,
The number of occurrences of welding is extremely small and wear resistance is also reduced, and both welding resistance and wear resistance are excellent.
以上詳記した通り本発明によれば、従来の銀一酸化カド
ミウム系の電気接点材料よりも耐溶着性、耐消耗性に優
れた銀一酸化すす電気接点材料を得ることができるとい
う優れた効果があり、この得られた銀一酸化すず電気接
点材料は従来の銀一酸化カドミウム系の電気接点材料に
とつて代ることのできる画期的な電気接点材料と言える
。As detailed above, according to the present invention, a silver monoxide soot electrical contact material having superior welding resistance and wear resistance than conventional silver cadmium monoxide based electrical contact materials can be obtained. The obtained silver-tin monoxide electrical contact material can be said to be an epoch-making electrical contact material that can replace the conventional silver-cadmium monoxide-based electrical contact material.
Claims (1)
酸化性雰囲気中において２５０〜６００℃で内部酸化す
ることを特徴とする銀−酸化すず電気接点材料の製造方
法。1 A binary alloy consisting of 2 to 15% by weight of tin and the balance silver,
A method for producing a silver-tin oxide electrical contact material, characterized by internal oxidation at 250 to 600°C in an oxidizing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52015943A JPS6049705B2 (en) | 1977-02-16 | 1977-02-16 | Method for manufacturing silver-tin oxide electrical contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52015943A JPS6049705B2 (en) | 1977-02-16 | 1977-02-16 | Method for manufacturing silver-tin oxide electrical contact material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53100914A JPS53100914A (en) | 1978-09-02 |
| JPS6049705B2 true JPS6049705B2 (en) | 1985-11-05 |
Family
ID=11902836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52015943A Expired JPS6049705B2 (en) | 1977-02-16 | 1977-02-16 | Method for manufacturing silver-tin oxide electrical contact material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049705B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58110639A (en) * | 1981-12-23 | 1983-07-01 | Tanaka Kikinzoku Kogyo Kk | Sliding contact material |
| US4472211A (en) * | 1982-05-20 | 1984-09-18 | Chugai Denki Kogyo Kobushiki Kaisha | Method of internally oxidizing Ag-Sn alloy contact material |
| US4457787A (en) * | 1982-09-21 | 1984-07-03 | Chugai Denki Kogyo Kabushiki-Kaisha | Internal oxidation method of Ag alloys |
| US5147728A (en) * | 1990-01-26 | 1992-09-15 | Seiichi Tanaka | Ag-SnO2 electrical contact materials |
-
1977
- 1977-02-16 JP JP52015943A patent/JPS6049705B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53100914A (en) | 1978-09-02 |
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