JPH0521961B2 - - Google Patents
Info
- Publication number
- JPH0521961B2 JPH0521961B2 JP58139144A JP13914483A JPH0521961B2 JP H0521961 B2 JPH0521961 B2 JP H0521961B2 JP 58139144 A JP58139144 A JP 58139144A JP 13914483 A JP13914483 A JP 13914483A JP H0521961 B2 JPH0521961 B2 JP H0521961B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- oxide
- resistance
- electrical contact
- materials
- 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
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- 239000000843 powder Substances 0.000 claims description 26
- 229910002058 ternary alloy Inorganic materials 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000011812 mixed powder Substances 0.000 claims description 5
- 229910007610 Zn—Sn Inorganic materials 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 10
- 238000003466 welding Methods 0.000 description 9
- 229910017727 AgNi Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005245 sintering Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は電気接点材料の製造方法、特に、耐溶
着性に優れた無害な電気接点用焼結材料の製造方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an electrical contact material, and in particular to a method for producing a harmless sintered material for electrical contacts with excellent welding resistance.
従来、中負荷領域の電気接点材料として汎用さ
れているAgCdO系焼結材料は、優れた接点性能
を有しているが、有害なCdを材料とするため、
その製造工程および使用中にCdを含有する粉塵
が公害を発生する恐れがあり、しかも、Ag含有
量が多いために生産コストが高いという欠点もあ
つた。 Conventionally, AgCdO-based sintered materials, which have been widely used as electrical contact materials in the medium load range, have excellent contact performance, but because they are made of harmful Cd,
During the manufacturing process and use, Cd-containing dust may cause pollution, and the production cost is high due to the high Ag content.
他方、Cdを含有しない無害な電気接点材料と
してAgNi系焼結材料が実用化されているが、こ
のAgNi系焼結材料はAgCdO系のものに比べ耐溶
着性において劣るという問題があつた。 On the other hand, AgNi-based sintered materials have been put into practical use as harmless electrical contact materials that do not contain Cd, but this AgNi-based sintered materials have a problem in that they are inferior in welding resistance compared to AgCdO-based materials.
本発明は、従来のAgNi系焼結材料の欠点であ
る耐溶着性を向上させると共に、AgCdO系電気
接点材料と同等以上の接点性能を有する安価な電
気接点材料を製造できるようにすることを目的と
するものである。 The purpose of the present invention is to improve the welding resistance, which is a drawback of conventional AgNi-based sintered materials, and to make it possible to manufacture inexpensive electrical contact materials that have contact performance equivalent to or better than AgCdO-based electrical contact materials. That is.
本発明の要旨は、Ag−Zn−Snからなる３元合
金粉末を内部酸化させて酸化物粉末を得、この酸
化物粉末に金属Ni粉末を添加、混合してNi5〜20
％、Zn酸化物Zn換算で１〜15％、Sn酸化物Sn換
算で１〜10％、残部実質的にAgからなる組成の
混合粉末とし、この混合粉末を加圧成形した後、
中性雰囲気中で焼結させることを特徴とする電気
接点材料の製造方法にある。 The gist of the present invention is to internally oxidize a ternary alloy powder consisting of Ag-Zn-Sn to obtain an oxide powder, and add and mix metal Ni powder to this oxide powder to obtain Ni5-20.
%, Zn oxide 1 to 15% in terms of Zn, Sn oxide 1 to 10% in terms of Sn, and the balance essentially consists of Ag, and after pressure-molding this mixed powder,
A method for producing an electrical contact material, characterized by sintering in a neutral atmosphere.
本発明に係る電気接点用焼結材料の成分組成を
前記のように限定した理由について説明すると、
Niは耐消耗性を向上させるために添加されるが、
その添加量が５％未満ではその効果が得られず、
20％を越えると接触抵抗が増大するので、その添
加量を５〜20％とした。 The reason why the composition of the sintered material for electrical contacts according to the present invention is limited as described above is as follows.
Ni is added to improve wear resistance, but
If the amount added is less than 5%, the effect cannot be obtained,
If it exceeds 20%, the contact resistance increases, so the amount added is set at 5 to 20%.
また、Zn酸化物は耐溶着性を向上させるため
に添加されるもので、その添加量が金属Znに換
算して１％未満ではその添加効果が充分に達成さ
れず、15％を越えると３元合金化、内部酸化が困
難となるうえに、焼結後の加工性が悪くなるの
で、その添加量を１〜15％とした。 In addition, Zn oxide is added to improve welding resistance, and if the amount added is less than 1% in terms of metal Zn, the addition effect will not be fully achieved, and if it exceeds 15%, the Since alloying and internal oxidation become difficult, and the workability after sintering deteriorates, the amount added is set at 1 to 15%.
さらに、Sn酸化物は耐溶着性および耐消耗性
を改善するために添加されるもので、その添加量
が金属Snに換算して１％未満ではその添加効果
が充分に達成されず、10％以上では３元合金化が
困難となるので、その添加量を１〜10％とした。 Furthermore, Sn oxide is added to improve welding resistance and abrasion resistance, and if the amount added is less than 1% in terms of metal Sn, the addition effect will not be fully achieved; Since it becomes difficult to form a ternary alloy with the above amount, the amount added is set to 1 to 10%.
前記成分組成の本発明方法に係る電気接点材料
は、従来のAgNi系焼結材料に比べ耐溶着性が大
幅に改善され、AgCdO系焼結材料とほぼ同等の
耐溶着性を示す。また、接触抵抗に関しては、
AgNi系のものより良好であり、AgCdO系のもの
と比べても同等の特性を示す。さらに、耐消耗性
に関しては、AgNi系のものとほぼ同等であり、
AgCdO系のものより良好な結果を示す。しかも、
本発明方法に係る電気接点材料は、AgCdO系焼
結材料に比べAg含有量を低減できるので、安価
に製造できるとともに、有害なCdを含有しない
ので、公害発生の原因とならない。 The electrical contact material according to the method of the present invention having the above-mentioned composition has greatly improved adhesion resistance compared to conventional AgNi-based sintered materials, and exhibits adhesion resistance almost equivalent to that of AgCdO-based sintered materials. Also, regarding contact resistance,
It is better than AgNi-based products, and exhibits the same characteristics as AgCdO-based products. Furthermore, in terms of wear resistance, it is almost equivalent to AgNi-based products,
Shows better results than those based on AgCdO. Moreover,
The electrical contact material according to the method of the present invention has a lower Ag content than AgCdO-based sintered materials, so it can be produced at low cost, and does not contain harmful Cd, so it does not cause pollution.
前記電気接点材料は、本発明によれば、材料と
してAg−Zn−Snからなる３元合金粉末を内部酸
化させて酸化物粉末を得、この酸化物粉末に金属
Ni粉末を添加、混合して得た混合粉末を加圧成
形した後、不活性ガスなの中性雰囲気中650〜700
℃で24時間加熱焼結する方法により製造される。 According to the present invention, the electrical contact material is obtained by internally oxidizing a ternary alloy powder consisting of Ag-Zn-Sn to obtain an oxide powder, and adding a metal to the oxide powder.
After the mixed powder obtained by adding and mixing Ni powder is press-molded,
Manufactured by heating and sintering at ℃ for 24 hours.
本発明に係る電気接点材料の製造方法におい
て、３元合金粉末を内部酸化させて酸化物粉末を
得、この酸化物粉末に金属Ni粉末を添加して加
圧成形した後、中性雰囲気中で焼結するのは、
Zn酸化物、Sn酸化物の粉末をAg粉末に混合して
加圧成形後に焼結させる方法では、粒子の微細化
が困難であるとともに、焼結によつて酸化物の粒
子が成長して偏析を生じるので、これらの問題を
解消して均一な組成を得るためである。なお、内
部酸化はZn，Snのみを酸化させるもので、Agが
酸化しない通常の条件下で行なわれる。 In the method for producing an electrical contact material according to the present invention, ternary alloy powder is internally oxidized to obtain oxide powder, metal Ni powder is added to this oxide powder, pressure molded, and then in a neutral atmosphere. What is sintered is
In the method of mixing Zn oxide or Sn oxide powder with Ag powder and sintering it after pressure forming, it is difficult to make the particles finer, and the oxide particles grow due to sintering, resulting in segregation. This is to solve these problems and obtain a uniform composition. Note that internal oxidation oxidizes only Zn and Sn, and is carried out under normal conditions in which Ag is not oxidized.
また、焼結を中性雰囲気中で行なうのは、内部
酸化された酸化物粉末が還元されるのを防止する
ためである。したがつて、真空中で焼結すること
も可能である。なお、焼結後、得られた焼結体に
サイジング、コイニングなどの再加工を施すのが
好ましい。 Further, the reason why the sintering is performed in a neutral atmosphere is to prevent the internally oxidized oxide powder from being reduced. It is therefore also possible to sinter in vacuum. Note that, after sintering, it is preferable to subject the obtained sintered body to reprocessing such as sizing and coining.
以下、本発明の実施例について説明する。 Examples of the present invention will be described below.
実施例
Ag−Zn−Snからなる３元合金を粉砕機で３元
合金粉末（粒径：５〜10μ）とし、この３元合金
粉末を酸素雰囲気中600℃、５気圧、40時間で内
部酸化させて酸化物粉末を得た。その後、前記酸
化物粉末に金属Ni粉末（平均粒径：5μ）を添加
し、金属換算で配合割合がAg85重量％、Ni8重
量％、Zn4重量％、Sn3重量％の組成となるよう
に配合し、ボールミルにて均一に混合して混合粉
末を得、この混合粉末を4t／cm2の圧力下で直径20
mm、長さ30mmに成形し、得られた成形体を不活性
ガス雰囲気中650〜700℃で24時間加熱して焼結さ
せることにより、電気接点用焼結体を得た。この
焼結体を700〜800℃に加熱し、押出機を用いて直
径６mmの棒状体に成形した時、伸線ヘツダーで加
圧して得た接点をリレーに組み込み、供試品とし
た。Example A ternary alloy consisting of Ag-Zn-Sn is made into ternary alloy powder (particle size: 5 to 10μ) using a crusher, and this ternary alloy powder is internally oxidized in an oxygen atmosphere at 600°C, 5 atm, and 40 hours. An oxide powder was obtained. Thereafter, metallic Ni powder (average particle size: 5μ) was added to the oxide powder, and the mixture was mixed so that the composition was 85% by weight of Ag, 8% by weight of Ni, 4% by weight of Zn, and 3% by weight of Sn. , mixed uniformly in a ball mill to obtain a mixed powder, and then milled this mixed powder under a pressure of 4t/cm 2 to a diameter of 20mm.
mm and length of 30 mm, and the obtained molded body was heated and sintered at 650 to 700° C. for 24 hours in an inert gas atmosphere to obtain a sintered body for an electrical contact. This sintered body was heated to 700 to 800°C and formed into a rod-shaped body with a diameter of 6 mm using an extruder, and the contacts obtained by pressurizing with a wire drawing header were assembled into a relay and used as a test product.
比較例 １
原料としてAgとCdOとの粉末を用い、実施例
と同様にしてAg−12％CdOからなる焼結体を得
て接点となし、これをリレーに組み込んで供試品
とした。Comparative Example 1 Using powders of Ag and CdO as raw materials, a sintered body of Ag-12% CdO was obtained in the same manner as in the example and used as a contact, and this was incorporated into a relay to make a test product.
比較例 ２
原料としてAgおよびNiの粉末を用い、これら
をAg85％、Ni15％の重量比で混合し、実施例と
同様に処理して得たAgNi系焼結体を接点とし、
これをリレーに組み込んで供試品とした。Comparative Example 2 Ag and Ni powders were used as raw materials, and they were mixed at a weight ratio of 85% Ag and 15% Ni, and an AgNi-based sintered body obtained by processing in the same manner as in the example was used as a contact,
This was incorporated into a relay and used as a test product.
前記各実施例および比較例で得た供試品につい
て、下記の条件で接触抵抗、耐消耗性および溶着
特性を測定した。それらの結果を表１に示す。な
お、耐消耗性、耐溶着性については、50万回開閉
動作させた時の接点の消耗量、溶着回数で表す。 The contact resistance, abrasion resistance, and welding properties of the samples obtained in each of the Examples and Comparative Examples described above were measured under the following conditions. The results are shown in Table 1. Note that wear resistance and welding resistance are expressed in terms of the amount of contact wear and the number of welds when the contact is opened and closed 500,000 times.
［試験条件］
電圧： AC220V
電流： 5A
負荷： 抵抗負荷
接触力： 15ｇ
開閉頻度： 30回／分
表 １
接触抵抗 消耗量 溶着回数
（ｍΩ） （mg） （回数）
実施例 12〜36 0.41 ０
比較例１ 10〜34 1.56 ２
比較例２ 15〜88 0.43 ７
表１に示す結果から明らかなように、本発明に
係る電気接点材料は、比較例２のものに比べ耐溶
着性が大幅に改善され、比較例１のものと同等以
上の特性を示している。[Test conditions] Voltage: AC220V Current: 5A Load: Resistance load Contact force: 15g Opening/closing frequency: 30 times/min Table 1 Contact resistance Amount of wear Welding number (mΩ) (mg) (Number of times) Examples 12 to 36 0.41 0 Comparison Example 1 10-34 1.56 2 Comparative Example 2 15-88 0.43 7 As is clear from the results shown in Table 1, the electrical contact material according to the present invention has significantly improved welding resistance compared to that of Comparative Example 2. , exhibiting characteristics equal to or better than those of Comparative Example 1.
また、耐消耗性については、実施例の方が比較
例１のものより良好であるとともに、比較例２と
ほぼ同等の特性を示している。 In addition, regarding the wear resistance, the examples are better than those of Comparative Example 1, and exhibit almost the same characteristics as Comparative Example 2.
さらに、接触抵抗については、実施例の方が比
較例２よりも秀れ、比較例１のものと比べてもほ
ぼ同等の特性を示していることがわかる。 Furthermore, regarding contact resistance, it can be seen that the example is superior to Comparative Example 2, and even when compared with Comparative Example 1, it shows almost the same characteristics.
Claims (1)
化させて酸化物粉末を得、この酸化物粉末に金属
Ni粉末を添加、混合してNi5〜20％、Zn酸化物
Zn換算で１〜15％、Sn酸化物Sn換算で１〜10
％、残部実質的にAgからなる組成の混合粉末と
し、この混合粉末を加圧成形した後、中性雰囲気
中で焼結させることを特徴とする電気接点材料の
製造方法。1 A ternary alloy powder consisting of Ag-Zn-Sn is internally oxidized to obtain an oxide powder, and a metal is added to this oxide powder.
Add Ni powder and mix to create Ni5~20%, Zn oxide
1 to 15% in terms of Zn, 1 to 10 in terms of Sn oxide Sn
%, the balance being substantially Ag, the mixed powder is press-molded, and then sintered in a neutral atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58139144A JPS6029405A (en) | 1983-07-28 | 1983-07-28 | Manufacture of electrical contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58139144A JPS6029405A (en) | 1983-07-28 | 1983-07-28 | Manufacture of electrical contact material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6029405A JPS6029405A (en) | 1985-02-14 |
| JPH0521961B2 true JPH0521961B2 (en) | 1993-03-26 |
Family
ID=15238584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58139144A Granted JPS6029405A (en) | 1983-07-28 | 1983-07-28 | Manufacture of electrical contact material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6029405A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419124A (en) * | 2017-06-28 | 2017-12-01 | 常州力纯数码科技有限公司 | A kind of preparation method for the type electrical contact material that is uniformly dispersed |
-
1983
- 1983-07-28 JP JP58139144A patent/JPS6029405A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6029405A (en) | 1985-02-14 |
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