JPH05217473A - Manufacture of electrode material - Google Patents
Manufacture of electrode materialInfo
- Publication number
- JPH05217473A JPH05217473A JP4264419A JP26441992A JPH05217473A JP H05217473 A JPH05217473 A JP H05217473A JP 4264419 A JP4264419 A JP 4264419A JP 26441992 A JP26441992 A JP 26441992A JP H05217473 A JPH05217473 A JP H05217473A
- Authority
- JP
- Japan
- Prior art keywords
- chromium
- copper
- molten
- oxygen content
- alloy
- 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.)
- Withdrawn
Links
- 239000007772 electrode material Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000011651 chromium Substances 0.000 claims abstract description 29
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010949 copper Substances 0.000 claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 229910000599 Cr alloy Inorganic materials 0.000 claims abstract description 19
- 239000000788 chromium alloy Substances 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000005245 sintering Methods 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 8
- 239000007789 gas Substances 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 6
- 229910052786 argon Inorganic materials 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000004484 Briquette Substances 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 238000010298 pulverizing process Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 238000009689 gas atomisation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000010299 mechanically pulverizing process Methods 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Switches (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アトマイズ法により銅
（Ｃｕ）−クロム（Ｃｒ）合金の粉末を得、これを用い
て電極材料を製造する方法に関し、特に真空インタラプ
タの電極の材料の製造に用いて好適なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an electrode material by using a powder of a copper (Cu) -chromium (Cr) alloy by an atomizing method, and particularly to a method for producing a material for an electrode of a vacuum interrupter. It is suitable for use in.
【０００２】[0002]
【従来の技術】真空インタラプタの電極材料として要求
される重要な性能の一つに電流遮断性能の高いことが挙
げられる。2. Description of the Related Art One of the important performances required for a vacuum interrupter electrode material is that it has a high current interruption performance.
【０００３】銅−クロム合金は、この電流遮断性能が非
常に優れている電極材料として知られており、従来では
電解法等により製造された銅の粉末と、粉砕法等により
製造されたクロムの粉体とを混合したものを圧縮加圧成
形し、これを高温で焼結する粉末冶金法による製造方法
が一般的である。A copper-chromium alloy is known as an electrode material having an extremely excellent current cutoff performance. Conventionally, a copper powder produced by an electrolytic method or the like and a chromium powder produced by a pulverizing method or the like are used. A general method is a powder metallurgical method in which a mixture of powder and powder is compression-pressed and sintered at high temperature.
【０００４】この他、圧縮加圧成形した銅の粉体の空隙
部分にクロムを溶浸させる溶浸法や、或いは銅とクロム
との混合粉体を圧縮加圧成形し、これを低温で焼結した
後、その空隙部分に銅を溶浸させるようにした方法、或
いは鋳造による方法等も試みられている。In addition, an infiltration method in which chromium is infiltrated into the voids of the compressed and compressed copper powder, or a mixed powder of copper and chromium is compression and pressed, and this is baked at a low temperature. After bonding, a method of infiltrating copper into the void portion, a method of casting, or the like has also been attempted.
【０００５】この銅−クロム合金は、銅のマトリックス
中にクロムが分散したものであるが、電極材料としての
電気的特性に着目した場合、微細なクロムが銅マトリッ
クス中に均一に分散している方が好ましい。This copper-chromium alloy is one in which chromium is dispersed in a copper matrix, and when attention is paid to the electrical characteristics as an electrode material, fine chromium is uniformly dispersed in the copper matrix. Is preferred.
【０００６】ところが、粉末冶金法により製造される従
来の銅−クロム合金の場合、粉砕法により機械的に粉砕
して得られるクロム粉末の粒度分布の幅が非常に大き
く、しかもその平均粒径が４０μｍ程度にも達するた
め、銅の粉体とクロムの粉体とを混合する際にこれらの
比重差や粉体の粒度、或いは粒度分布の相違により、均
一に混合され難い欠点を有する。この結果、焼結後にお
ける銅マトリックス中のクロムが微細且つ均一に分散せ
ず、その電気的特性が期待できるほど良好ではなかっ
た。However, in the case of the conventional copper-chromium alloy produced by the powder metallurgy method, the width of the grain size distribution of the chromium powder obtained by mechanically pulverizing by the pulverizing method is very large, and the average grain size thereof is large. Since it reaches about 40 μm, when the copper powder and the chromium powder are mixed, there is a drawback that it is difficult to mix them uniformly due to the difference in specific gravity, the particle size of the powder, or the difference in particle size distribution. As a result, the chromium in the copper matrix after sintering was not finely and uniformly dispersed, and its electrical characteristics were not so good as expected.
【０００７】そこで、クロム粉末を更に機械的に粉砕し
てその粒径を小さくすることが考えられるが、この場合
には粉砕の過程及び保管時にクロム粉体の表面が酸化が
進行し、酸素含有量の増加に伴って焼結性が低下してし
まう問題も生ずる。又、粉砕法により得られるクロム粉
末をふるいで分級し、微細径のクロム粉末のみを使用す
ることも考えられるが、この方法では歩留りが極めて悪
くなってしまい、製造コストが嵩む原因となる。Therefore, it is conceivable to further mechanically pulverize the chrome powder to reduce its particle size. In this case, the surface of the chrome powder is oxidized during the pulverization process and storage, so that the oxygen content is increased. There is also a problem that the sinterability decreases as the amount increases. It is also conceivable to classify the chrome powder obtained by the pulverizing method by sieving and use only the chrome powder having a fine diameter. However, this method causes extremely low yield and causes an increase in manufacturing cost.
【０００８】一方、溶浸法により製造される従来の銅−
クロム合金の場合、クロム粉体は酸化し易いため、その
品質管理を徹底する必要がある上、表面が酸化したクロ
ムの粉末は銅との濡れ性が悪く、溶浸ができなくなる欠
点を有する。On the other hand, the conventional copper produced by the infiltration method
In the case of a chromium alloy, since chromium powder is easily oxidized, it is necessary to thoroughly control the quality thereof, and the surface-oxidized chromium powder has poor wettability with copper and has a drawback that it cannot be infiltrated.
【０００９】又、鋳造法により製造される従来の銅−ク
ロム合金の場合、凝固時の冷却速度が遅いため、銅のマ
トリックス中のクロム粒子が成長してしまい、均一で微
細なクロムの分散が困難となる上、凝固偏析が生じ易い
ことから得られる銅−クロム合金の品質にばらつきが生
じ易い欠点を有する。Further, in the case of the conventional copper-chromium alloy produced by the casting method, since the cooling rate during solidification is slow, the chromium particles grow in the copper matrix, resulting in a uniform and fine dispersion of chromium. In addition to the difficulty, solidification segregation is likely to occur, which causes a drawback that the quality of the copper-chromium alloy obtained tends to vary.
【００１０】本発明者らは、微細化が困難で表面酸化の
問題を抱えたクロムの機械的粉砕法を採用せず、アトマ
イズ法により銅−クロム合金の微粉末を得た。The present inventors have obtained a fine powder of a copper-chromium alloy by an atomizing method without adopting the mechanical pulverization method of chromium, which is difficult to make fine and has a problem of surface oxidation.
【００１１】[0011]
【発明が解決しようとする課題】しかしながら、このア
トマイズ粉体の製造時、原料のクロム中の不純物、特に
酸素含有量が多いと、得られる電極中の酸素含有量が多
くなってしゃ断性能を低下させるおそれがある。However, during the production of this atomized powder, when the content of impurities, especially oxygen, in the raw material chromium is large, the oxygen content in the obtained electrode is large and the blocking performance is lowered. May cause
【００１２】また、クロム表面の酸化膜によりクロムが
溶解しにくくなり、ノズルからの噴霧が困難になる。こ
れを避けるためには、銅−クロム溶湯の温度を高くする
必要があるが、溶湯温度が１６００〜１７００℃と高温
のため、これ以上溶解温度を上げるためにはヒータ、断
熱材、るつぼ等の耐久性を考慮した設備が必要となる。Further, the oxide film on the surface of chromium makes it difficult for chromium to be dissolved, which makes spraying from the nozzle difficult. In order to avoid this, it is necessary to raise the temperature of the molten copper-chromium, but since the molten metal temperature is as high as 1600 to 1700 ° C, in order to raise the melting temperature further, heaters, heat insulating materials, crucibles, etc. Equipment that considers durability is required.
【００１３】[0013]
【課題を解決するための手段】上記事情にかんがみ、予
め酸素含有量の低いクロムを用いて合金溶湯を作り、そ
れをアトマイズ法により粉末化し、得られた銅−クロム
合金粉末の酸素含有量を調べ、さらにこの粉末を成形、
加熱焼結して焼結体を作り、得られた焼結体の酸素含有
量を調べた。その結果を表１に示す。[Means for Solving the Problems] In view of the above circumstances, a molten alloy is prepared in advance by using chromium having a low oxygen content, which is pulverized by an atomizing method, and the oxygen content of the obtained copper-chromium alloy powder is adjusted. Examine and further mold this powder,
A sintered body was produced by heating and sintering, and the oxygen content of the obtained sintered body was examined. The results are shown in Table 1.
【００１４】[0014]
【表１】 [Table 1]
【００１５】表１から、クロム原料中の酸素含有量を
０．１％以下にすれば、焼結体における酸素含有量を
０．１５％以下に抑えられることがわかる。It can be seen from Table 1 that if the oxygen content in the chromium raw material is 0.1% or less, the oxygen content in the sintered body can be suppressed to 0.15% or less.
【００１６】さらに、上記焼結体を直径４０mmのスパイ
ラル電極に機械加工し、真空インタラプタに組み込み、
再点弧確率を調べた。その結果を図２に示す。これは、
７．２KV−２０KAのしゃ断を３０回行い、再点弧する回
数から再点弧確率を求めたものである。Further, the above sintered body was machined into a spiral electrode having a diameter of 40 mm and incorporated into a vacuum interrupter,
The re-ignition probability was investigated. The result is shown in FIG. this is,
The re-ignition probability is calculated from the number of times of re-ignition after performing the cutoff of 7.2KV-20KA 30 times.
【００１７】図２から、もとのクロム原料の酸素含有量
が０．１％以下であれば、再点弧確率を著しく低くでき
ることがわかる。From FIG. 2, it can be seen that the re-ignition probability can be remarkably lowered if the oxygen content of the original chromium raw material is 0.1% or less.
【００１８】本発明に係る電極材料の製造方法は、かか
る知見に基づいてなされたもので、銅の溶湯中に酸素含
有量が０．１％以下のクロムを投入し、得られた合金溶
湯をアトマイズ法により粉末化し、得られた銅−クロム
合金粉末を加熱成形し、または加圧成形した後加熱焼結
することを特徴とするものである。The method for producing an electrode material according to the present invention was made on the basis of the above findings. The molten alloy obtained by adding chromium having an oxygen content of 0.1% or less to the molten alloy is It is characterized in that it is powdered by an atomizing method, and the obtained copper-chromium alloy powder is heat-molded or pressure-molded and then heat-sintered.
【００１９】[0019]
【作用】予め酸素含有量の少ないクロムを用いて合金溶
湯を得、これをアトマイズ法により粉体化することによ
り、酸素含有量の低い銅−クロム合金粉末を得ることが
でき、この合金粉末を用いて電極材料を製造することに
より、酸素含有量の低い電極を得ることができる。The alloy molten metal is previously obtained by using chromium having a low oxygen content, and by atomizing the molten alloy, a copper-chromium alloy powder having a low oxygen content can be obtained. An electrode material having a low oxygen content can be obtained by producing an electrode material using the same.
【００２０】[0020]
【実施例】まず、本発明に係る方法により得られる電極
材料の適用例の一例である真空インタラプタを図１に示
す。相互に一直線状をなす一対のリード棒１１，１２の
対向端面には、それぞれ電極１３，１４が図示しないろ
う材を介して一体的に設けてある。これら電極１３，１
４を囲む筒状のシールド１５の外周中央部は、このシー
ルド１５を囲む一対の絶縁筒１６，１７の間に挟まれた
状態で保持されている。一方の前記リード棒１１は、一
方の絶縁筒１６の一端に接合された金属端板１８を気密
に貫通した状態で、この金属端板１８に一体的に固定さ
れている。図示しない駆動装置に連結される他方のリー
ド棒１２は、他方の絶縁筒１７の他端に気密に接合され
た他方の金属端板１９にベローズ２０を介して連結さ
れ、駆動装置の作動に伴って電極１３，１４の対向方向
に往復動可能に可動側の電極１４が固定側の電極１３に
対して開閉動作するようになっている。EXAMPLE First, FIG. 1 shows a vacuum interrupter as an example of application of an electrode material obtained by the method according to the present invention. Electrodes 13 and 14 are integrally provided on opposing end surfaces of a pair of lead rods 11 and 12 that are in a straight line with each other via a brazing material (not shown). These electrodes 13, 1
The central portion of the outer periphery of the cylindrical shield 15 that surrounds the shield 4 is held in a state of being sandwiched between a pair of insulating cylinders 16 and 17 that surround the shield 15. One of the lead rods 11 is integrally fixed to the metal end plate 18 in a state where the metal end plate 18 joined to one end of the one insulating cylinder 16 penetrates airtightly. The other lead rod 12 connected to the drive device (not shown) is connected to the other metal end plate 19 that is airtightly joined to the other end of the other insulating cylinder 17 via the bellows 20, and is accompanied by the operation of the drive device. The movable electrode 14 is opened and closed with respect to the fixed electrode 13 so that the electrodes 13 and 14 can reciprocate in opposite directions.
【００２１】次に、電極１３，１４の製造方法について
説明する。まず、耐火るつぼ内において銅を１２００℃
で溶解後、さらに温度を１７００℃まで上げ、この溶融
銅中に酸素含有量が０．１％以下のブリケット状のクロ
ムを銅に対して２０重量％相当量を投入し、銅−クロム
の混合溶湯を作る。Next, a method of manufacturing the electrodes 13 and 14 will be described. First, in a refractory crucible, put copper at 1200 ° C.
After melting, the temperature was further raised to 1700 ° C., and briquette-like chromium having an oxygen content of 0.1% or less was added to this molten copper in an amount equivalent to 20% by weight with respect to copper to mix copper-chromium. Make molten metal.
【００２２】次に、上記混合溶湯を５〜８MPa に加圧し
たアルゴン（Ａｒ）ガスで噴霧し、銅−クロムからなる
アトマイズ合金粉を製造する。得られた合金粉体を電子
顕微鏡で観察すると、５μｍ以下のクロム粒子が均一に
分散していることが確認された。Next, the mixed molten metal is sprayed with an argon (Ar) gas pressurized to 5 to 8 MPa to produce atomized alloy powder composed of copper-chromium. When the obtained alloy powder was observed with an electron microscope, it was confirmed that chromium particles of 5 μm or less were uniformly dispersed.
【００２３】得られた銅−クロム合金粉末を直径４２mm
の金型に入れ、４９０MPa （５０００kgf ／cm2 ）の圧
力で加圧成形し、成形体（圧粉体）を得る。The obtained copper-chromium alloy powder is 42 mm in diameter.
In a metal mold, and pressure molding is performed at a pressure of 490 MPa (5000 kgf / cm 2 ) to obtain a molded body (compacted powder).
【００２４】次に、得られた成形体を真空炉（真空圧：
５×１０-5Torr）中において１０５０℃で３０分間加熱
し、焼結させた。このようにして得られた焼結体の充填
率は（理論密度に対する比）は９５％であり、導電率は
５０％ＩＡＣＳ、酸素含有量は０．１５％以下であっ
た。なお、焼結の温度、時間を調節することにより、銅
マトリクス中のクロムの粒径をコントロールすることが
できる。Next, the obtained molded product is vacuum furnace (vacuum pressure:
Sintered by heating at 1050 ° C. for 30 minutes in 5 × 10 −5 Torr). The filling factor (ratio to the theoretical density) of the thus obtained sintered body was 95%, the conductivity was 50% IACS, and the oxygen content was 0.15% or less. The particle size of chromium in the copper matrix can be controlled by adjusting the sintering temperature and time.
【００２５】焼結体を直径４０mmの電極形状に機械加工
し、図１に示す真空インタラプタの電極１３，１４と
し、その性能を調べたところ、前述のように再点弧確率
が極めて低く、かつ、クロムが均一に分散されているこ
とにより、発生したアークの拡散がスムーズに行われ、
しゃ断性能が向上したことがわかった。さらに、クロム
の微細化に伴って接触抵抗が低下し、これに伴って耐溶
着力も低下させることができた。The sintered body was machined into an electrode shape with a diameter of 40 mm to form the electrodes 13 and 14 of the vacuum interrupter shown in FIG. 1, and its performance was examined. As described above, the re-ignition probability was extremely low, and , As chromium is uniformly dispersed, the generated arc is smoothly diffused,
It was found that the cutting performance was improved. Furthermore, the contact resistance was lowered with the refinement of chromium, and the welding resistance could be lowered accordingly.
【００２６】上記実施例方法においては、アトマイズ合
金粉の焼結体を得るのに、高圧での加圧成形工程を経て
いるが、この加圧成形に代えて自然充填であってもよ
い。つまり、銅−クロム合金粉末をるつぼ又は金型に自
然充填し、そのまま加熱し焼結するのである。焼結後は
上記実施例と同様に機械加工して電極形状とする。In the method of the above-mentioned embodiment, a pressure molding step under high pressure is performed to obtain a sintered body of atomized alloy powder. However, instead of this pressure molding, natural filling may be performed. That is, the crucible or the mold is naturally filled with the copper-chromium alloy powder, and is heated and sintered as it is. After sintering, it is machined into an electrode shape in the same manner as in the above embodiment.
【００２７】なお、銅−クロム合金溶湯を粉末化するア
トマイズ法としては、ガスアトマイズ法、水アトマイズ
法のどちらでもよいが、残留ガスが少ないことからする
と、ガスアトマイズ法が好ましい。また、ガスアトマイ
ズ法においては不活性ガスを用いるが、不活性ガスとし
てはアルゴンガス、窒素（Ｎ2)ガスが一般的であるが、
窒素ガスは窒化のおそれがあるためアルゴンガスが好ま
しい。The atomizing method for pulverizing the molten copper-chromium alloy may be either a gas atomizing method or a water atomizing method, but the gas atomizing method is preferable from the viewpoint of less residual gas. In addition, an inert gas is used in the gas atomizing method, and as the inert gas, argon gas and nitrogen (N 2 ) gas are generally used.
Argon gas is preferable because nitrogen gas may cause nitriding.
【００２８】[0028]
【発明の効果】本発明に係る電極材料の製造方法によれ
ば、銅の溶湯中に投入されるクロムの酸素含有量を０．
１％以下に抑えたので、合金溶湯をアトマイズ法により
粉末化して得られるアトマイズ合金粉体を加熱成形、ま
たは加圧成形及び焼結して得られる電極材料の酸素含有
量が低下し、しゃ断性能が向上した。EFFECT OF THE INVENTION According to the method for producing an electrode material of the present invention, the oxygen content of chromium added to a molten copper is set to 0.
Since the content is suppressed to 1% or less, the oxygen content of the electrode material obtained by atomizing the alloy melt by atomizing the atomized alloy powder obtained by heat molding, or pressure molding and sintering is reduced, and the cutting performance is reduced. Has improved.
【図１】真空インタラプタの一例を表す断面図である。FIG. 1 is a cross-sectional view showing an example of a vacuum interrupter.
【図２】クロム原料の酸素含有量と再点弧確率との関係
を示すグラフである。FIG. 2 is a graph showing a relationship between an oxygen content of a chromium raw material and a re-ignition probability.
１１，１２ リード棒 １３，１４ 電極 11,12 Lead bar 13,14 Electrode
Claims (2)
のクロムを投入し、得られた合金溶湯をアトマイズ法に
より粉末化し、得られた銅−クロム合金粉末を加熱成形
することを特徴とする電極材料の製造方法。1. A method in which chromium having an oxygen content of 0.1% or less is added to a molten copper, the obtained molten alloy is pulverized by an atomizing method, and the obtained copper-chromium alloy powder is heat-formed. And a method for producing an electrode material.
のクロムを投入し、得られた合金溶湯をアトマイズ法に
より粉末化し、得られた銅−クロム合金粉末を加圧成形
し、得られた成形体を加熱焼結することを特徴とする電
極材料の製造方法。2. A chromium alloy having an oxygen content of 0.1% or less is added to a molten copper, the obtained molten alloy is atomized by an atomizing method, and the obtained copper-chromium alloy powder is pressure-molded. And a method for producing an electrode material, which comprises heating and sintering the obtained molded body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4264419A JPH05217473A (en) | 1991-11-06 | 1992-10-02 | Manufacture of electrode material |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28961291 | 1991-11-06 | ||
| JP3-289612 | 1991-11-06 | ||
| JP4264419A JPH05217473A (en) | 1991-11-06 | 1992-10-02 | Manufacture of electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05217473A true JPH05217473A (en) | 1993-08-27 |
Family
ID=26546502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4264419A Withdrawn JPH05217473A (en) | 1991-11-06 | 1992-10-02 | Manufacture of electrode material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05217473A (en) |
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| JP2008057026A (en) * | 2006-09-04 | 2008-03-13 | Toshiba Corp | Contact material for vacuum valve and manufacturing method thereof |
| CN103745876A (en) * | 2013-12-24 | 2014-04-23 | 陕西宝光真空电器股份有限公司 | Compound contact of copper chromium series used in vacuum interrupter and processing method thereof |
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| US10981226B2 (en) | 2016-10-25 | 2021-04-20 | Daihen Corporation | Copper alloy powder, method of producing additively-manufactured article, and additively-manufactured article |
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-
1992
- 1992-10-02 JP JP4264419A patent/JPH05217473A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008057026A (en) * | 2006-09-04 | 2008-03-13 | Toshiba Corp | Contact material for vacuum valve and manufacturing method thereof |
| CN103745876A (en) * | 2013-12-24 | 2014-04-23 | 陕西宝光真空电器股份有限公司 | Compound contact of copper chromium series used in vacuum interrupter and processing method thereof |
| CN104550903A (en) * | 2014-12-11 | 2015-04-29 | 陕西斯瑞工业有限责任公司 | Hydrogen plasma deoxidation method for chromium powder |
| US10421122B2 (en) | 2015-05-13 | 2019-09-24 | Daihen Corporation | Metal powder, method of producing additively-manufactured article, and additively-manufactured article |
| US10843260B2 (en) | 2015-05-13 | 2020-11-24 | Daihen Corporation | Metal powder, method of producing additively-manufactured article, and additively-manufactured article |
| US11077495B2 (en) | 2015-05-13 | 2021-08-03 | Daihen Corporation | Metal powder, method of producing additively-manufactured article, and additively-manufactured article |
| US10981226B2 (en) | 2016-10-25 | 2021-04-20 | Daihen Corporation | Copper alloy powder, method of producing additively-manufactured article, and additively-manufactured article |
| US12084745B2 (en) | 2016-10-25 | 2024-09-10 | Daihen Corporation | Copper alloy powder, method of producing additively-manufactured article, and additively-manufactured article |
| CN110153438A (en) * | 2019-06-22 | 2019-08-23 | 陕西斯瑞新材料股份有限公司 | A kind of chromiumcopper powder by atomization technique of free-falling formula nozzle |
| CN119255875A (en) * | 2022-06-08 | 2025-01-03 | 住友电气工业株式会社 | Powder, metal component, electric contact, method for producing powder, and method for producing metal component |
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