JPH0754113A - Production of ag-oxide composite electric contact material - Google Patents
Production of ag-oxide composite electric contact materialInfo
- Publication number
- JPH0754113A JPH0754113A JP20047393A JP20047393A JPH0754113A JP H0754113 A JPH0754113 A JP H0754113A JP 20047393 A JP20047393 A JP 20047393A JP 20047393 A JP20047393 A JP 20047393A JP H0754113 A JPH0754113 A JP H0754113A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- layer
- oxide
- reducing
- oxide composite
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、Ag−酸化物系複合電気
接点材料の線材または条材の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a wire or strip of Ag-oxide composite electric contact material.
【０００２】[0002]
【従来の技術】従来より、電気接点材料としてはAgやAg
-Ni あるいはAg-CdO系が用いられている。中でも、Ag-N
i は低接触抵抗で消耗が少ないため、Agに代わってかな
り広汎に用いられている。また、Ag-Ni は加工やスポッ
ト溶接が容易なので台材等への固着作業の自動化が可能
となり、組立コストが安く、また、品質の安定化がはか
れるという大きな特長をもっている。2. Description of the Related Art Conventionally, Ag or Ag has been used as an electric contact material.
-Ni or Ag-CdO system is used. Above all, Ag-N
Since i has low contact resistance and little wear, i is widely used instead of Ag. Since Ag-Ni is easy to process and spot-weld, it is possible to automate the work of sticking it to a base material, etc., which has the major advantages of low assembly cost and stable quality.
【０００３】しかし、反面、Ag-CdO等のAg−酸化物系と
比較して消耗量が多く、耐溶着性が劣るため、小型スイ
ッチ等の小容量領域に使用範囲が限られている。近時、
各産業分野における合理化、機械装置の自動化は目覚ま
しい発達を遂げているが、これに伴い装置は大型化、複
雑化する傾向にあり、それに対してこれらの制御系は小
型化、動作の高頻度化、大容量化が要求されており、こ
の点からもAg-Ni の耐溶着性は常に問題となり、その代
替材料の開発が望まれている。On the other hand, on the other hand, the amount of wear is large and the welding resistance is inferior to that of Ag-oxide type such as Ag-CdO, so that the range of use is limited to a small capacity region such as a small switch. Recently,
Rationalization in each industrial field and automation of mechanical devices have made remarkable progress, but with this trend, devices tend to become larger and more complicated, whereas these control systems are becoming smaller and the frequency of operations is increasing. However, a large capacity is required, and also from this point, the welding resistance of Ag-Ni is always a problem, and the development of an alternative material for it is desired.
【０００４】そこで、上記の欠点を解決すべくAg-Ni に
種々の金属元素あるいは金属酸化物、窒化物、炭化物等
を添加して特性の向上を試みている。しかしながら、Ag
-Ni系本来の特長である安定した接触抵抗や加工性、ス
ポット溶接が種々の添加物の混在により阻害され、いず
れも満足すべき結果が得られていない。また、Ag-CdO系
は耐溶着性、耐消耗性等にすぐれ、使用範囲が広いこと
で知られているが、加工性、台材への溶接性等が問題と
なる。Therefore, in order to solve the above-mentioned drawbacks, various metallic elements or metal oxides, nitrides, carbides, etc. are added to Ag-Ni to try to improve the characteristics. However, Ag
-Stable contact resistance, workability, and spot welding, which are the original features of the Ni system, are hampered by the mixture of various additives, and no satisfactory results have been obtained. Further, the Ag-CdO system is known to have excellent welding resistance, wear resistance and the like and has a wide range of use, but it has problems such as workability and weldability to a base material.
【０００５】すなわち、酸化物が台材との界面に存在す
るため、スポット溶接やろう付けでの接合強度が非酸化
物系の材料と比較して著しく小さい。そこで、これらAg
-CdO系材料にスポット溶接やろう付けのための酸化物を
含まない層を形成した複合材料が考えられている。That is, since the oxide is present at the interface with the base material, the joint strength in spot welding or brazing is significantly smaller than that of the non-oxide type material. So these Ag
-A composite material in which a layer containing no oxide for spot welding or brazing is formed on a CdO-based material is considered.
【０００６】[0006]
【発明が解決しようとする課題】ところが、この複合材
料は、例えば、Ag-CdO系条材とAgリボンを熱間圧着法で
接合し、該複合条材を得ているが、実際に台材等を接合
してスイッチに組み込んでテストを行うと、Ag-CdOとAg
との境界から剥離して所定の寿命に達しないことが多
い。However, this composite material is obtained by, for example, joining an Ag-CdO-based strip and an Ag ribbon by a hot pressing method to obtain the composite strip. When they are joined to the switch and tested, Ag-CdO and Ag-CdO
It often peels off from the boundary between and and does not reach a predetermined life.
【０００７】そこで、本出願人は、平成３年特許願第３
４７４１３号〜３４７４２０号等のような技術を開発し
た。これらは、還元性雰囲気中で加熱することにより、
材料の表面のある深さまで酸化物を還元することで、ス
ポット溶接やろう付けのための層を、酸化物層と組織の
上で境界層のない連続した層として形成させることによ
り上記のような剥離を防止する事が可能となった。[0007] Therefore, the applicant of the present invention, the patent application No. 3 in 1991
Technologies such as No. 47413-347420 have been developed. By heating these in a reducing atmosphere,
By reducing the oxide to a certain depth on the surface of the material, a layer for spot welding or brazing is formed as a continuous layer with no boundary layer on top of the oxide layer and the structure as described above. It has become possible to prevent peeling.
【０００８】ところが、このような技術は強制的に還元
を行うもので、厳密にいえば還元層内に酸化物から分離
した酸素と還元ガスとの反応生成物、例えばCOやH2O 等
が残留し、大きな空孔（ポア）を出現させることがあ
り、後の伸線あるいは圧延加工の際にこの空孔が微細な
クラックとして悪影響を与え、ひいては台材との接合強
度にも影響をおよぼすことになる。However, such a technique forcibly carries out reduction, and strictly speaking, reaction products of oxygen and reducing gas separated from oxides in the reducing layer, such as CO and H 2 O, are not generated. Large holes (pores) may remain and appear, and during subsequent wire drawing or rolling, these holes adversely affect as fine cracks, which in turn affects the joint strength with the base material. It will be.
【０００９】[0009]
【課題を解決するための手段】そこで本発明は、Ag−酸
化物系複合材料の線材または条材の表面を還元性雰囲気
中での熱処理により還元層を形成させた材料をさらに不
活性ガス雰囲気中で熱処理し、還元層の状態を変成させ
ることを特徴とする。さらに、還元層を変成させたAg−
酸化物系複合材料の線材または条材を、さらに伸線ある
いは圧延、成形等の加工を加えることで還元層の材料強
度を改善することを特徴とするものである。Therefore, according to the present invention, a material in which a reducing layer is formed by heat-treating the surface of a wire or strip of Ag-oxide composite material in a reducing atmosphere is further used in an inert gas atmosphere. It is characterized in that the state of the reduction layer is transformed by heat treatment in the inside. In addition, the Ag-
It is characterized in that the material strength of the reduction layer is improved by further processing such as wire drawing, rolling or molding of the wire or strip of the oxide composite material.
【００１０】一般に、Ag−酸化物系材料の酸化物を還元
しようとした場合、還元性ガス例えばH2と酸化物が接触
した途端、急激な反応が起こって、その内部は空孔の多
いスポンジ状を呈することになり、材料としてきわめて
脆弱な組織になる。したがって、通常の方法で線材また
は条材の表面に還元層を形成する目的で還元性ガスと接
触させて還元層を得たとしても、該還元層が脆弱なた
め、台材にろう付けまたは溶接しても接点脱落等の事故
のおそれがあり、実用に供し得るものではない。Generally, when an oxide of an Ag-oxide material is tried to be reduced, a rapid reaction occurs as soon as the reducing gas, for example, H 2 and the oxide come into contact with each other, and the inside thereof has many voids. It will have a sponge-like structure and will be a very fragile tissue. Therefore, even if the reducing layer is obtained by contacting with a reducing gas for the purpose of forming the reducing layer on the surface of the wire or strip by the usual method, the reducing layer is fragile and thus brazing or welding to the base material. However, there is a risk of accidents such as contact loss, and it is not practical.
【００１１】本発明では、Ag−酸化物系材料の表面を還
元処理した後、不活性ガス雰囲気中で加熱することによ
り還元層内に残留する反応生成物が拡散あるいは不活性
ガスに置換され、さらには長時間の加熱によって焼結効
果により還元層が収縮して空孔が消滅することになる。
また、この不活性ガス雰囲気中での加熱処理後にさらに
加工を加えることで、機械的に還元層の組織を緻密にす
ると共に加熱と加工を繰り返すことにより加工によって
与えられた歪みを駆動力に再加熱による再結晶現象が起
こり、還元層の緻密化を促進、強化するものである。In the present invention, the reaction product remaining in the reducing layer is diffused or replaced with an inert gas by heating the surface of the Ag-oxide-based material after reduction treatment and heating in an inert gas atmosphere. Furthermore, heating for a long time causes the reduction layer to contract due to the sintering effect, and the voids disappear.
In addition, by further processing after the heat treatment in this inert gas atmosphere, the structure of the reduction layer is mechanically densified and the strain given by the processing is restored to the driving force by repeating heating and processing. A recrystallization phenomenon occurs due to heating, which promotes and strengthens the densification of the reduced layer.
【００１２】以上の一連の手段の相乗的作用が理想的な
効果を生ぜしめている。The synergistic action of the above series of means produces an ideal effect.
【００１３】[0013]
【実施例】以下に本発明の実施例を説明する。 第１実施例 焼結・成形と押し出しによって製造された直径４mmのAg
-20Wt%CdO の線材を伸線加工により直径２mmの線とし
た。EXAMPLES Examples of the present invention will be described below. First Example Ag having a diameter of 4 mm manufactured by sintering, molding and extrusion
A wire of -20Wt% CdO was drawn into a wire having a diameter of 2 mm.
【００１４】これを、５点制御の連続炉を用い入炉側か
ら、３００℃、４５０℃、５５０℃、７００℃、８００
℃に設定し、N2ガスとH2ガスの体積比率が４：１の雰囲
気になるように調整して、９５mm/minの速度で通過さ
せ、線材表面の外周に還元層を有する線材を得た。つぎ
に、この線材をArガスの雰囲気中６００℃で４時間保持
し、試料Ａとした。Using a continuous furnace with a 5-point control, from the inlet side, 300 ° C., 450 ° C., 550 ° C., 700 ° C., 800
The temperature is set to ℃, adjusted so that the volume ratio of N 2 gas and H 2 gas is 4: 1 and passed at a speed of 95 mm / min to obtain a wire rod having a reducing layer on the outer circumference of the wire surface. It was Next, this wire was held in an Ar gas atmosphere at 600 ° C. for 4 hours to obtain Sample A.
【００１５】第２実施例 焼結・成形と押し出しによって製造された直径４mmのAg
-10Wt%SnO2の線材を伸線加工により直径３mmの線とし
た。これを、電流加熱装置を用いてN2ガスとCOガスの体
積比率が２：１の雰囲気になるように調整し、温度を７
００℃に保持されるように通電電流を制御して連続的に
加熱することで、線材表面の外周に還元層を有する線材
を得た。Second Embodiment Ag having a diameter of 4 mm produced by sintering, molding and extrusion
A wire of -10Wt% SnO 2 was drawn into a wire having a diameter of 3 mm. This was adjusted so that the volume ratio of N 2 gas and CO gas was 2: 1 using a current heating device, and the temperature was adjusted to 7
A wire material having a reducing layer on the outer circumference of the wire surface was obtained by controlling the energizing current so as to be maintained at 00 ° C. and heating continuously.
【００１６】つぎに、この線材をN2ガス雰囲気中７００
℃で２時間保持した後、さらに伸線加工により直径２mm
の線材として試料Ｂとした。 第３実施例 焼結・成形と押し出しによって製造された直径５mmのAg
-3Wt%CdO-5Wt%Sb2O3-3Wt%In2O3の線材を伸線加工により
直径４mmの線とした。Next, the wire was placed in an atmosphere of N 2 gas for 700 times.
After being kept at ℃ for 2 hours, it is further drawn to have a diameter of 2 mm
Sample B was used as the wire. Third embodiment Ag having a diameter of 5 mm manufactured by sintering, molding and extrusion
A wire of -3Wt% CdO-5Wt% Sb 2 O 3 -3Wt% In 2 O 3 was drawn into a wire having a diameter of 4 mm.
【００１７】これを、電流加熱装置を用いてN2ガスとH2
ガスの体積比率が８：１の雰囲気になるように調整し、
温度を９００℃に保持されるように通電電流を制御して
連続的に加熱することで、線材表面の外周に還元層を有
する線材を得た。つぎに、この線材をN2ガス雰囲気中６
５０℃で３時間保持した後、さらに伸線加工により直径
２mmの線材として試料Ｃとした。This was heated with N 2 gas and H 2 using an electric current heating device.
Adjust the gas volume ratio to be 8: 1,
A wire having a reducing layer on the outer periphery of the wire surface was obtained by continuously heating while controlling the applied current so that the temperature was kept at 900 ° C. Next, this wire was placed in an N 2 gas atmosphere for 6
After being held at 50 ° C. for 3 hours, it was further drawn to obtain Sample C as a wire rod having a diameter of 2 mm.
【００１８】第４実施例 焼結・成形と押し出しによって製造された直径５mmのAg
-7Wt%SnO2-#Wt%ZnO-1Wt%In2O3-0.5Wt%Niの線材を伸線加
工により直径４mmの線とした。これを、５点制御の連続
炉を用い入炉側から、２５０℃、３００℃、４５０℃、
６００℃、７００℃に設定し、N2ガスとH2ガスの体積比
率が１：１の雰囲気になるように調整して、１０５mm/m
inの速度で通過させ、線材表面の外周に還元層を有する
線材を得た。Fourth Embodiment Ag having a diameter of 5 mm manufactured by sintering, molding and extrusion
A wire of -7Wt% SnO 2- # Wt% ZnO-1Wt% In 2 O 3 -0.5Wt% Ni was drawn into a wire having a diameter of 4 mm. From the entrance side using a 5-point continuous furnace, 250 ° C, 300 ° C, 450 ° C,
Set to 600 ℃ and 700 ℃, and adjust so that the volume ratio of N 2 gas and H 2 gas is 1: 1. 105mm / m
The wire was passed at a speed of in to obtain a wire having a reducing layer on the outer periphery of the surface of the wire.
【００１９】つぎに、この線材をN2ガスの雰囲気中８０
０℃で１時間保持し、伸線加工を繰り返して直径２mmの
線材として試料Ｄとした。つぎに、比較のために従来例
として最も標準的な２例を作製し、比較試験を行った。 従来例 焼結・成形と押し出しによって製造された直径３mmのAg
-20Wt%CdO の線材を伸線加工により直径２mmの線とし
た。Next, the wire was heated in an atmosphere of N 2 gas for 80 minutes.
The sample was held at 0 ° C. for 1 hour and the drawing process was repeated to obtain Sample D as a wire having a diameter of 2 mm. Next, for comparison, the two most standard conventional examples were prepared and comparative tests were conducted. Conventional example Ag with a diameter of 3 mm manufactured by sintering, molding and extrusion
A wire of -20Wt% CdO was drawn into a wire having a diameter of 2 mm.
【００２０】これを、５点制御の連続炉を用い入炉側か
ら、３５０℃、５００℃、６５０℃、６５０℃、７５０
℃に設定し、N2ガスとH2ガスの体積比率が２：１の雰囲
気になるように調整して、８５mm/minの速度で通過さ
せ、線材表面の外周に還元層を有する線材を得た。 従来例 上記従来例と同様の方法によりAg-10Wt%SnO2の線材を
得た。This is carried out from the entrance side using a continuous furnace controlled at 5 points from 350 ° C., 500 ° C., 650 ° C., 650 ° C., 750
The temperature is set to ℃, adjusted so that the volume ratio of N 2 gas and H 2 gas is 2: 1 and passed at a speed of 85 mm / min to obtain a wire rod having a reducing layer on the outer periphery of the wire surface. It was Conventional Example A wire of Ag-10Wt% SnO 2 was obtained by the same method as the above-mentioned conventional example.
【００２１】以上のような実施例Ａ〜Ｄおよび従来例
、の各線材を長さ２mmに切断した後、台材にスポッ
ト溶接により固着した。つぎに、成形プレスにより厚さ
１mm幅および長さ２．５mmの角形になるように成形加工
し、この各接点の剪断強度を測定して表１に示す。Each of the wire rods of Examples A to D and the conventional example as described above was cut to a length of 2 mm and then fixed to the base material by spot welding. Next, a forming press was used to form a prism having a width of 1 mm and a length of 2.5 mm, and the shear strength of each contact was measured and shown in Table 1.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【発明の効果】以上詳細に説明をした本発明によると、
さらに、試験結果に示される如く、台材との溶接強度が
優れるために接点開閉テストにおいても優れた効果を有
するものである。また、従来のようなAg層を必要としな
いために低価格で提供することができる効果を有する。According to the present invention described in detail above,
Further, as shown in the test results, the welding strength with the base material is excellent, so that it also has an excellent effect in the contact opening / closing test. In addition, since it does not require the Ag layer as in the conventional case, it can be provided at a low price.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 奈良 喬 東京都千代田区鍛冶町二丁目９番12号 株 式会社徳力本店内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Nara 2-9-12 Kajicho, Chiyoda-ku, Tokyo Incorporated company Tokuriki Head Office
Claims (3)
の表面を還元性雰囲気中での熱処理により還元層を形成
させた後、さらに不活性ガス雰囲気中で熱処理し、還元
層の状態を変成させることを特徴とするAg−酸化物系複
合電気接点材料の製造方法。1. The state of the reduced layer after the surface of the wire or strip of Ag-oxide composite material is heat-treated in a reducing atmosphere to form a reducing layer, and then heat-treated in an inert gas atmosphere. A method for producing an Ag-oxide-based composite electrical contact material, comprising:
の表面を還元性雰囲気中での熱処理により還元層を形成
させた後、不活性ガス雰囲気中で熱処理し、還元層の状
態を変成させ、さらに伸線あるいは圧延、成形等の加工
を加えることにより還元層の強度を改善することを特徴
とするAg−酸化物系複合電気接点材料の製造方法。2. The surface of a wire or strip of Ag-oxide composite material is heat-treated in a reducing atmosphere to form a reducing layer, and then heat-treated in an inert gas atmosphere to change the state of the reducing layer. A method for producing an Ag-oxide composite electrical contact material, characterized by improving the strength of a reduction layer by subjecting it to transformation, and further applying processing such as wire drawing, rolling or molding.
の表面を還元性雰囲気中での熱処理により還元層を形成
させた後、不活性ガス雰囲気中で熱処理し、還元層の状
態を変成させ、さらに伸線あるいは圧延、成形等の加工
と不活性ガス雰囲気中で熱処理を繰り返すことにより還
元層の強度を改善することを特徴とするAg−酸化物系複
合電気接点材料の製造方法。3. The state of the reduced layer is formed by forming a reduced layer on the surface of a wire or strip of Ag-oxide composite material by heat treatment in a reducing atmosphere and then heat treating it in an inert gas atmosphere. A method for producing an Ag-oxide-based composite electrical contact material, characterized by improving the strength of a reduction layer by carrying out transformation and further processing such as wire drawing, rolling, molding and heat treatment in an inert gas atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20047393A JPH0754113A (en) | 1993-08-12 | 1993-08-12 | Production of ag-oxide composite electric contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20047393A JPH0754113A (en) | 1993-08-12 | 1993-08-12 | Production of ag-oxide composite electric contact material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0754113A true JPH0754113A (en) | 1995-02-28 |
Family
ID=16424908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20047393A Pending JPH0754113A (en) | 1993-08-12 | 1993-08-12 | Production of ag-oxide composite electric contact material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754113A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468719A (en) * | 2020-03-07 | 2020-07-31 | 福达合金材料股份有限公司 | Silver tin oxide sheet-shaped electrical contact and preparation method thereof |
| CN111468718A (en) * | 2020-03-07 | 2020-07-31 | 福达合金材料股份有限公司 | Silver copper oxide sheet-shaped electric contact and preparation method thereof |
-
1993
- 1993-08-12 JP JP20047393A patent/JPH0754113A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111468719A (en) * | 2020-03-07 | 2020-07-31 | 福达合金材料股份有限公司 | Silver tin oxide sheet-shaped electrical contact and preparation method thereof |
| CN111468718A (en) * | 2020-03-07 | 2020-07-31 | 福达合金材料股份有限公司 | Silver copper oxide sheet-shaped electric contact and preparation method thereof |
| CN111468719B (en) * | 2020-03-07 | 2022-03-25 | 浙江福达合金材料科技有限公司 | Silver tin oxide sheet-shaped electrical contact and preparation method thereof |
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