JPS63286558A - Production of electrical contact material - Google Patents
Production of electrical contact materialInfo
- Publication number
- JPS63286558A JPS63286558A JP12089187A JP12089187A JPS63286558A JP S63286558 A JPS63286558 A JP S63286558A JP 12089187 A JP12089187 A JP 12089187A JP 12089187 A JP12089187 A JP 12089187A JP S63286558 A JPS63286558 A JP S63286558A
- Authority
- JP
- Japan
- Prior art keywords
- electrical contact
- contact material
- sheet
- alloy
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 230000001590 oxidative effect Effects 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 229910017980 Ag—Sn Inorganic materials 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000005098 hot rolling Methods 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 description 18
- 230000003647 oxidation Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 7
- 229910001128 Sn alloy Inorganic materials 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、電気接点材料、特に内部酸化しにくいＡｇ合
金の電気接点材料の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an electrical contact material, particularly a method for producing an electrical contact material made of an Ag alloy that is resistant to internal oxidation.
（従来技術とその問題点）
従来、電気接点材料の製造方法の一つに、Ａｇ−Ｓｎ合
金の板材を内部酸化する方法がある。このＡｇ−Ｓｎ合
金は、高温で酸化すると酸化物凝集層が形成され、これ
が内部酸化の進行を妨げる為、比較的低温（４３０℃）
で高圧下（９気圧）で酸化するので、酸化に時間がかか
り、７日間酸化を行っても酸化深さは０ 、５ ＋ｎ程
度で、それ以上は酸化が進行せず、仮に酸化できても溶
質金属（Ｓｎ）が表面に向かって拡散していく為中央部
に大きな酸化物希薄層が形成されるものである。このよ
うに中央部に大きな酸化物希薄層を有するＡｇ５ｎＯ！
の電気接点材料を打抜き加工した接点材をベース材にろ
う付けして得た電気接点は、使用中摩耗により接点材中
央部の酸化物希薄層が露出すると急激に溶着、消耗が起
こり、早期に使用不能に陥るものである。(Prior Art and its Problems) Conventionally, one of the methods for manufacturing electrical contact materials is a method of internally oxidizing a plate material of an Ag-Sn alloy. When this Ag-Sn alloy is oxidized at high temperatures, an oxide agglomerated layer is formed, which prevents the progress of internal oxidation, so the temperature is relatively low (430°C).
Since oxidation is carried out under high pressure (9 atm), oxidation takes time, and even if oxidation is carried out for 7 days, the oxidation depth is about 0. As the solute metal (Sn) diffuses toward the surface, a large oxide diluted layer is formed in the center. In this way, Ag5nO has a large oxide diluted layer in the center!
Electrical contacts obtained by punching contact materials and brazing them to a base material will rapidly weld and wear out when the thin oxide layer in the center of the contact material is exposed due to wear during use, resulting in premature wear. It becomes unusable.
この為、Ａｇ５ｎＯ，の電気接点材料を作る場合は、Ａ
ｇ−Ｓｎ合金粉末を作り、これを内部酸化した後、圧縮
、焼結し、圧延加工を行って板材を作っていた。しかし
この前酸化法は設備費が高く、しかも手間隙がかかって
コスト高となっていた。その上この前酸化法で得た接点
材料は、前述の後酸化法で得た接点材料のように接点表
面が緻密な酸化物層となることがないので、耐溶着性、
耐消耗性は充分とは云えず、後酸化法で得た接点材料よ
りは劣るものであった。For this reason, when making an electrical contact material of Ag5nO,
A g-Sn alloy powder was produced, internally oxidized, compressed, sintered, and rolled to produce a plate material. However, the previous oxidation method required high equipment costs and required time and effort, resulting in high costs. Furthermore, the contact material obtained by this pre-oxidation method does not have a dense oxide layer on the contact surface unlike the contact material obtained by the post-oxidation method described above, so it has excellent welding resistance and
The abrasion resistance was not sufficient and was inferior to contact materials obtained by the post-oxidation method.
（発明の目的）
本発明は上記問題点を解決すべくなされたもので、後酸
化法で接点材料の中央部に酸化物希薄層が形成されない
ようにした電気接点材料の製造方法を提供することを目
的とするものである。(Object of the Invention) The present invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide a method for manufacturing an electrical contact material in which a dilute oxide layer is not formed in the center of the contact material by a post-oxidation method. The purpose is to
（問題点を解決するための手段）
上記問題点を解決するための本発明による電気接点材料
の製造方法は、内部酸化しにくいＡｇ合金を鋳造し、次
に圧延加工により薄い板材となし、次いでこの薄い板材
を折り重ねて内部酸化し、然る後再び圧延加工により薄
い板材となすことを特徴とするものである。(Means for Solving the Problems) In order to solve the above problems, the method for producing electrical contact materials according to the present invention involves casting an Ag alloy that is difficult to internally oxidize, then rolling it into a thin plate material, and then This thin plate material is folded, internally oxidized, and then rolled again to form a thin plate material.
（作用）
上記のように本発明の電気接点材料の製造方法は、薄い
板材を内部酸化する為、酸化時間が短くて済み、中央部
に酸化物希薄層が形成されない。(Function) As described above, since the method for producing an electrical contact material of the present invention internally oxidizes a thin plate material, the oxidation time is short and a dilute oxide layer is not formed in the central portion.
また板厚方向の内部酸化組織のばらつきが小さくなる。Furthermore, the variation in the internal oxidation structure in the thickness direction is reduced.
（実施例）
本発明による電気接点材料の製造方法の一実施例を説明
すると、先ずＡｇ Ｓｎ９．５ｗｔ％合金を鋳造して
幅４０龍、長さ７０１１、厚さ１０１ｍの厚板ブロック
を得た。次にこの厚板ブロックを圧延加工して厚さ０．
１ｍｍ、幅６０龍の薄い板材となした。次いでこの薄い
板材のトリクロルエタンで脱脂後長さ４０ｍ＋ｓで巻く
ように折り重ね、加熱炉中に入れて９気圧、５００℃で
３０時間内部酸化した。然る後この内部酸化した折り重
ね板材を８００℃で熱間圧延して幅５５ｆｌ、長さ１０
７龍、厚さ０．５鶴の薄い板材を得た。(Example) To explain an example of the method for producing an electrical contact material according to the present invention, first, a 9.5wt% Ag Sn alloy was cast to obtain a thick plate block having a width of 40mm, a length of 7011m, and a thickness of 101m. . Next, this thick plate block is rolled to a thickness of 0.
It was made of a thin board with a width of 1 mm and a width of 60 mm. Next, this thin plate material was degreased with trichloroethane, folded to a length of 40 m+s, placed in a heating furnace, and internally oxidized at 9 atm and 500° C. for 30 hours. Thereafter, this internally oxidized folded plate material was hot rolled at 800°C to obtain a width of 55 fl and a length of 10 mm.
A thin board with a thickness of 7 dragons and a thickness of 0.5 cranes was obtained.
かようにして得た実施例の電気接点材料を、直径５１１
１に打抜いてディスク形接点材を作り、これをリベット
型ベース材の上面にろう付けしてリベット型クラッド電
気接点を作って固定接点とし、一方上記電気接点材料を
、直径４鶴に打抜き成形してオーバル形接点材を作り、
これをリベット型ベース材の上面にろう付けしてリベッ
ト型クラッド接点を作って可動接点として、下記の試験
条件にて接点開閉試験を行い、溶着発生上の接点開閉回
数と１０万回迄の消耗量を測定した処、下記の表に示す
ような結果を得た。同表の下欄にＡｇＡｇ−３鶴５％合
金の板材を内部酸化して得た従来の電気接点材料から実
施例と同一寸法のディスク形接点材とオーバル形接点材
を作り、これをリベット型ベース材にろう付けしてリベ
ット型クラッド接点の固定接点と可動接点を作って、こ
れを同じ試験条件の接点開閉試験による溶着発生上の接
点開閉回数と１０万回までの消耗量を示しである。The electrical contact material of the example thus obtained was
1 to make a disk-shaped contact material, and braze this to the top surface of the rivet-shaped base material to make a rivet-shaped clad electrical contact to make a fixed contact.Meanwhile, the above-mentioned electrical contact material was punched and formed into a diameter of 4 cranes. to make oval contact material,
This was brazed to the top surface of the rivet type base material to create a rivet type clad contact and used as a movable contact, and a contact opening/closing test was conducted under the following test conditions to determine the number of times the contact opens and closes before welding occurs and wear up to 100,000 cycles. When the amount was measured, the results shown in the table below were obtained. In the lower column of the same table, disk-shaped contact materials and oval-shaped contact materials with the same dimensions as in the example were made from conventional electrical contact materials obtained by internally oxidizing AgAg-3 Tsuru 5% alloy plate material, and these were made into rivet-shaped contact materials. A fixed contact and a movable contact of a rivet-type clad contact are made by brazing to a base material, and the contact opening/closing test under the same test conditions shows the number of times the contact opens and closes when welding occurs and the amount of wear up to 100,000 times. .
試験条件
電 流 ： 投入４０Ａ、定常１０Ａ電 圧
：ＡＣｌｏｏＶ
負 荷 ： 抵抗負荷
開閉頻度 ：２０回／ ｍ ｉ ｎ
接触力 ：４０ｇ
解離力 ：４５ｇ
上記の表で明らかなように実施例の電気接点材料を用い
た固定接点と可動接点の溶着発生上の接点開閉回数は、
従来例の電気接点材料を用いた固定接点と可動接点の溶
着発生上の接点開閉回数に比べ桁違いに多く、著しく耐
溶着性に優れていることが判る。また１万回迄の消耗量
は実施例の電気接点材料を用いた固定接点と可動接点が
、従来例の電気接点材料を用いた固定接点と可動接点に
比べ、著しく耐消耗性に優れていることが判る。Test conditions current: input 40A, steady voltage 10A
:AClooV Load: Resistance load Opening/closing frequency: 20 times/min Contact force: 40g Disassociation force: 45g As is clear from the table above, welding occurred between the fixed contact and the movable contact using the electrical contact material of the example. The number of times the contact opens and closes is
It can be seen that the number of times the contacts are opened and closed due to welding between a fixed contact and a movable contact using conventional electrical contact materials is an order of magnitude higher, and the welding resistance is extremely excellent. Furthermore, in terms of wear resistance up to 10,000 cycles, the fixed contacts and movable contacts using the electrical contact material of the example have significantly superior wear resistance compared to the fixed contacts and movable contacts using the conventional electrical contact material. I understand that.
これはひとえに実施例の固定接点と可動接点における接
点材の内部に酸化物希薄層が無く、内部酸化組織にばら
つきが無いからに他ならない。This is simply because there is no dilute oxide layer inside the contact material of the fixed contact and the movable contact of the example, and there is no variation in the internal oxidation structure.
尚、上記実施例は、素材がＡｇ−３鶴合金の場合である
が、これに限るものではなく、内部酸化しにくいＡｇ合
金ならば全てに適用できるものである。但しＡｇに添加
される元素の量には接点性能の面及び成形加工の面から
おのずと制限があることは言うまでもない。In the above embodiments, the material is Ag-3 Tsuru alloy, but it is not limited to this, and can be applied to any Ag alloy that is difficult to internally oxidize. However, it goes without saying that the amount of elements added to Ag is naturally limited in terms of contact performance and molding process.
（発明の効果）
以上の説明で判るように本発明の電気接点材料の製造方
法は、内部酸化しに（いＡｇ合金を薄い板材にした上折
り重ねて内部酸化する為、酸化時間が短くて済み、しか
も中央部に酸化希薄層が形成されず、内部酸化後その折
り重ねた薄い板材を圧延加工して板材とするので内部酸
化組織の板厚方向でのばらつきが少なくなる。従って能
率良く短時間に耐溶着性、耐消耗性に一段と、８１れた
Ａｇ酸化物系の電気接点材料を得ることができるという
効果がある。(Effects of the Invention) As can be seen from the above explanation, the method for manufacturing the electrical contact material of the present invention has a short oxidation time because internal oxidation is carried out by folding a Ag alloy into a thin plate. Furthermore, since a thin oxidized layer is not formed in the center, and the folded thin plate material is rolled after internal oxidation, the variation in the internal oxidation structure in the thickness direction is reduced. This has the effect that it is possible to obtain an Ag oxide-based electrical contact material that has improved welding resistance and wear resistance over time.
Claims (1)
り薄い板材となし、次いでこの薄い板材を折り重ねて内
部酸化し、然る後再び圧延加工により薄く板材となすこ
とを特徴とする電気接点材料の製造方法。An electrical contact characterized by casting an Ag alloy that is difficult to internally oxidize, then rolling it into a thin plate material, then folding this thin plate material and internally oxidizing it, and then rolling it again to make it into a thin plate material. Method of manufacturing the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12089187A JPS63286558A (en) | 1987-05-18 | 1987-05-18 | Production of electrical contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12089187A JPS63286558A (en) | 1987-05-18 | 1987-05-18 | Production of electrical contact material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63286558A true JPS63286558A (en) | 1988-11-24 |
Family
ID=14797547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12089187A Pending JPS63286558A (en) | 1987-05-18 | 1987-05-18 | Production of electrical contact material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63286558A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449919A (en) * | 1977-09-29 | 1979-04-19 | Tanaka Precious Metal Ind | Production of strengthened platinum |
| JPS6258522A (en) * | 1984-12-11 | 1987-03-14 | 中外電気工業株式会社 | Internally oxidized ag-sno based alloy metal contact material and making thereof |
-
1987
- 1987-05-18 JP JP12089187A patent/JPS63286558A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449919A (en) * | 1977-09-29 | 1979-04-19 | Tanaka Precious Metal Ind | Production of strengthened platinum |
| JPS6258522A (en) * | 1984-12-11 | 1987-03-14 | 中外電気工業株式会社 | Internally oxidized ag-sno based alloy metal contact material and making thereof |
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