JPH0543909A - Electrode material for plasma cutting - Google Patents
Electrode material for plasma cuttingInfo
- Publication number
- JPH0543909A JPH0543909A JP19926091A JP19926091A JPH0543909A JP H0543909 A JPH0543909 A JP H0543909A JP 19926091 A JP19926091 A JP 19926091A JP 19926091 A JP19926091 A JP 19926091A JP H0543909 A JPH0543909 A JP H0543909A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electrode material
- discharge characteristics
- cutting
- plasma cutting
- 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
- 239000007772 electrode material Substances 0.000 title claims abstract description 20
- 238000005520 cutting process Methods 0.000 title claims abstract description 16
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910000420 cerium oxide Inorganic materials 0.000 claims abstract 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims abstract 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000012298 atmosphere Substances 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- 229910052735 hafnium Inorganic materials 0.000 description 3
- 239000011812 mixed powder Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910020203 CeO Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
- Powder Metallurgy (AREA)
- Conductive Materials (AREA)
Abstract
(57)【要約】
【目的】 酸化雰囲気中で使用されるプラズマ切断用電
極材料において、コストが低く、放電特性が安定してお
り、消耗量が少なく、機械的強度も高い高性能な電極材
料を提供することにある。
【構成】 電極材料２ａは、高温耐酸化性に優れている
ルテニウム（Ｒｕ）に、放電特性に優れ、融点も高い酸
化ランタン（Ｌａ2Ｏ3）および酸化セリウム（Ｃｅ
Ｏ2）の少なくとも１種類を略２０〜７０容量％混合し
た焼結体である。この焼結体を、銅製のチップホルダー
に圧入し、電極２とする。この電極は、従来に比べ、耐
消耗性、放電特性に優れているため、切断スピードを上
げ、切断コストを下げることができるものである。
(57) [Abstract] [Purpose] A high-performance electrode material for plasma cutting that is used in an oxidizing atmosphere because of its low cost, stable discharge characteristics, low consumption, and high mechanical strength. To provide. [Structure] The electrode material 2a includes ruthenium (Ru), which has excellent high-temperature oxidation resistance, lanthanum oxide (La 2 O 3 ) and cerium oxide (Ce), which have excellent discharge characteristics and a high melting point.
It is a sintered body in which at least one of O 2 ) is mixed in an amount of approximately 20 to 70% by volume. This sintered body is pressed into a copper chip holder to form the electrode 2. Since this electrode is superior in wear resistance and discharge characteristics to the conventional one, the cutting speed can be increased and the cutting cost can be reduced.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、大気中、酸素雰囲気中
などにおいて使用されるプラズマ切断用電極材料に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode material for plasma cutting which is used in the atmosphere, oxygen atmosphere and the like.
【０００２】[0002]
【従来の技術】従来、大気中や酸素雰囲気中など酸化雰
囲気中でのプラズマ切断に使用される電極材料として
は、たとえばハフニウム（Ｈｆ）やジルコニウム（Ｚ
ｒ）などの金属材料が使用されている。また最近、特開
昭６３−１９９８４２号公報、特開昭６３−２１６９４
３号公報に示されるように、レニウム（Ｒｅ）やＲｕに
放電特性のよい酸化イットリウム（Ｙ2Ｏ3）を混合した
電極が開発されている。さらにガスタービン機関などの
ような種々の動力発生装置における火花点火器におい
て、特開昭５２−１１８１３７号公報に示されるように
耐熱耐酸化性金属であるＩｒまたはＲｕに、少量のＹ2
Ｏ3またはＴｈＯ2を混合した電極材料が開発されてい
る。2. Description of the Related Art Conventionally, as an electrode material used for plasma cutting in an oxidizing atmosphere such as air or oxygen atmosphere, for example, hafnium (Hf) or zirconium (Z) is used.
Metal materials such as r) are used. Further, recently, JP-A-63-199842 and JP-A-63-21694.
As shown in Japanese Patent Laid-Open No. 3, an electrode in which rhenium (Re) or Ru is mixed with yttrium oxide (Y 2 O 3 ) having good discharge characteristics has been developed. Further, in a spark igniter in various power generators such as a gas turbine engine, a small amount of Y 2 is added to Ir or Ru, which is a heat-resistant and oxidation-resistant metal, as disclosed in JP-A-52-118137.
Electrode materials mixed with O 3 or ThO 2 have been developed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記Ｈ
ｆやＺｒは極めて高価であり、入手も困難である。さら
に、消耗が速いので交換サイクルが短く、そのため切断
コストも高くつくという問題点があった。また前記の特
開昭６３−１９９８４２号公報、特開昭６３−２１６９
４３号公報に示されているＲｅ−Ｙ2Ｏ3またはＲｕ−Ｙ
2Ｏ3電極は大電流を流した時の放電特性が不安定であ
り、また電極の消耗も大きい。したがって、大気中や酸
素雰囲気中など酸化雰囲気中での切断に使用される電極
材料としては、コストの割には十分満足な性能を得られ
るものではないという問題点があった。However, the above-mentioned H
f and Zr are extremely expensive and difficult to obtain. Furthermore, since the consumption is fast, the replacement cycle is short, which results in a high cutting cost. Further, the above-mentioned JP-A-63-199842 and JP-A-63-2169.
It is shown in 43 No. Re-Y 2 O 3 or Ru-Y
The discharge characteristics of the 2 O 3 electrode when a large current is applied are unstable, and the electrode wear is large. Therefore, as an electrode material used for cutting in an oxidizing atmosphere such as the atmosphere or an oxygen atmosphere, there is a problem that sufficient performance cannot be obtained for the cost.
【０００４】さらに前記の特開昭６３−１９９８４２号
公報に示されているＩｒ−（Ｙ2Ｏ3、ＴｈＯ2）または
Ｒｕ−（Ｙ2Ｏ3、ＴｈＯ2）電極が同様の雰囲気下で使
用される電極として開発されている。しかし、これは火
花点火器としての使用を目的として開発されているた
め、その火花点火器の形状から機械的強度が重要視さ
れ、酸化物の添加量に制限があった。またＲｅ−Ｙ2Ｏ3
またはＲｕ−Ｙ2Ｏ3電極と同様に大気中や酸素雰囲気中
でのプラズマ切断に使用される電極材料としては、この
組成範囲では十分な性能を得られるものではないという
問題点があった。[0004] As further shown in JP 63-199842 Laid the Ir- (Y 2 O 3, ThO 2) or Ru- (Y 2 O 3, ThO 2) electrode is used under the same atmosphere It has been developed as an electrode. However, since this was developed for use as a spark igniter, the mechanical strength is important due to the shape of the spark igniter, and the amount of oxide added is limited. In addition, Re-Y 2 O 3
Alternatively, as with the Ru-Y 2 O 3 electrode, there is a problem that sufficient performance cannot be obtained in this composition range as an electrode material used for plasma cutting in the air or an oxygen atmosphere.
【０００５】本発明は、上述した問題点を解決するため
になされたものであり、その目的は、コストが低く、放
電特性の安定したプラズマ切断用電極材料を提供するこ
とにある。The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide an electrode material for plasma cutting, which is low in cost and has stable discharge characteristics.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するた
め、本発明の電極材料は、略３０〜８０容量％のＲｕ
と、略２０〜７０容量％のＬａ2Ｏ3またはＣｅＯ2のう
ち、少なくとも１種とを含有させた。In order to achieve this object, the electrode material of the present invention contains approximately 30 to 80% by volume of Ru.
And about 20 to 70% by volume of at least one of La 2 O 3 and CeO 2 .
【０００７】[0007]
【作用】上記の構成を有する本発明の電極材料の成分の
うち、Ｒｕは、融点が高く耐酸化性とくに高温耐酸化性
に優れている。また、Ｌａ2Ｏ3、ＣｅＯ2は放電特性に
優れており、また融点も高く、蒸気圧も低い。これらＲ
ｕとＬａ2Ｏ3またはＣｅＯ2の内、少なくとも１種類を
適当な割合で組み合わせることによって、プラズマ切断
機に使用される埋め込み型電極に必要な機械的強度が得
られ、酸化消耗と熱消耗が少なく、安定した放電特性を
保つことが可能となる。Ｒｕの好ましい含有量は、容量
％で略３０〜８０％であり、Ｌａ2Ｏ3もしくはＣｅＯ2
の好ましい含有量は、略２０〜７０％である。この電極
材料は、上記ＲｕとＬａ2Ｏ3もしくはＣｅＯ2の合金で
あるが、その特性を損なわない範囲内で少量の他の元素
を添加してもよい。Among the components of the electrode material of the present invention having the above structure, Ru has a high melting point and is excellent in oxidation resistance, particularly high temperature oxidation resistance. Also, La 2 O 3 and CeO 2 have excellent discharge characteristics, a high melting point, and a low vapor pressure. These R
By combining at least one of u and La 2 O 3 or CeO 2 in an appropriate ratio, the mechanical strength required for the embedded electrode used in the plasma cutting machine can be obtained, and oxidation consumption and heat consumption can be reduced. It is possible to maintain stable discharge characteristics with a small amount. The preferable content of Ru is about 30 to 80% by volume, and La 2 O 3 or CeO 2 is contained.
The preferable content of is about 20 to 70%. This electrode material is an alloy of Ru and La 2 O 3 or CeO 2 described above, but a small amount of another element may be added as long as the characteristics are not impaired.
【０００８】[0008]
【実施例】以下、本発明を具体化した一実施例を図面を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【０００９】まず、本実施例の電極材料の製造方法につ
いて説明する。平均粒度４．５μｍ、純度９９．９％の
Ｒｕ粉末と平均粒度３．０μｍ、純度９９．９％のＬａ
2Ｏ3粉末および平均粒度３．５μｍ、純度９９．９％の
ＣｅＯ2粉末を別々に、または混合してボールミルにて
５時間湿式混合し、乾燥した。得られたＲｕ−Ｌａ2Ｏ3
混合粉末、Ｒｕ−ＣｅＯ2混合粉末およびＲｕ−（Ｌａ2
Ｏ3＋ＣｅＯ2）混合粉末を金型内にて１ｔｏｎ／ｃｍ2
の成形圧で予備成形し、直径３ｍｍ、長さ５ｍｍの圧粉
体とした後、冷間静水圧プレス（ＣＩＰ）にて２ｔｏｎ
／ｃｍ2で本成形を行なう（この時、成形体密度は５５
〜６０％となる）。その後、アルゴン雰囲気中で焼結
（１９００℃−３０分）を行い直径２．２ｍｍ長さ４ｍ
ｍの焼結体（焼結体密度は約９７％となる）を形成し、
電極材料とした。First, a method for manufacturing the electrode material of this embodiment will be described. Ru powder having an average particle size of 4.5 μm and a purity of 99.9% and La having an average particle size of 3.0 μm and a purity of 99.9%
2 O 3 powder and CeO 2 powder having an average particle size of 3.5 μm and a purity of 99.9% were separately or mixed and wet-mixed in a ball mill for 5 hours and dried. The resulting Ru-La 2 O 3
Mixed powder, Ru-CeO 2 mixed powder and Ru- (La 2
O 3 + CeO 2 ) mixed powder in a mold at 1 ton / cm 2
After preforming with a molding pressure of 3 mm to obtain a powder compact having a diameter of 3 mm and a length of 5 mm, 2 tons is obtained by cold isostatic pressing (CIP)
Main forming is carried out at a density of 55 / cm 2
~ 60%). After that, sintering (1900 ° C-30 minutes) is performed in an argon atmosphere, and the diameter is 2.2 mm and the length is 4 m.
m sintered body (sintered body density is about 97%) is formed,
Used as an electrode material.
【００１０】次に、実験方法について説明する。図１及
び図２に示すように、得られた電極材料２ａを銅製のチ
ップホルダーに圧入した電極２と、ノズル７を備えたト
ーチ１を陰極とし、水冷した銅板３を陽極とする。次に
切断電源４により、両者間にアークを発生させ、コンプ
レッサ６より得られる圧縮エアーをエアレギュレータ５
を通して、電極２の周りを旋回させ、ノズル７より排出
することにより、プラズマアーク８を発生させる試験装
置を用い、プラズマアーク発生テストを行なった。その
ときの電極の消耗量を調べた結果を図３に示す。図３の
試験条件は電流３０Ａ、電圧１００Ｖ、エアー圧力３．
５Ｋｇ／ｃｍ2、時間５分間であった。また消耗量は立
方ミリメートル（ｍｍ3）で表わしてある。図３から解
るとおり、本発明による電極材料は、従来のＺｒやＨｆ
およびＲｕ−Ｙ2Ｏ3に比べその消耗量が少ない。Next, the experimental method will be described. As shown in FIGS. 1 and 2, an electrode 2 in which the obtained electrode material 2a is press-fitted into a copper chip holder and a torch 1 equipped with a nozzle 7 are used as a cathode, and a water-cooled copper plate 3 is used as an anode. Next, an arc is generated between the two by the cutting power source 4, and compressed air obtained from the compressor 6 is supplied to the air regulator 5
A plasma arc generation test was performed using a test device that swirls around the electrode 2 and discharges from the nozzle 7 to generate a plasma arc 8. FIG. 3 shows the results of examining the amount of electrode wear at that time. The test conditions in FIG. 3 are a current of 30 A, a voltage of 100 V, and an air pressure of 3.
It was 5 Kg / cm 2 and the time was 5 minutes. Also, the amount of consumption is expressed in cubic millimeters (mm 3 ). As can be seen from FIG. 3, the electrode material according to the present invention has the conventional Zr and Hf
And its consumption is smaller than that of Ru—Y 2 O 3 .
【００１１】この電極材料の製造は比較的容易であり、
原料の入手にも問題はない。この電極材料は、安定した
プラズマアークが得られ、、切断電極として用いた場合
には大電流を入力しても安定しており消耗も少なく、切
断スピードも速くまた厚板も容易に切断出来、従来の電
極に比べその性能が格段に向上することが確かめられ
た。The production of this electrode material is relatively easy,
There is no problem in obtaining raw materials. This electrode material provides a stable plasma arc, and when used as a cutting electrode, it is stable even when a large current is input, it consumes little, has a fast cutting speed, and can easily cut thick plates. It was confirmed that the performance was remarkably improved as compared with the conventional electrode.
【００１２】[0012]
【発明の効果】以上詳述したことから明らかなように、
本発明の組成範囲のＲｕ−Ｌａ2Ｏ3、Ｒｕ−ＣｅＯ2お
よびＲｕ−（Ｌａ2Ｏ3＋ＣｅＯ2）電極によれば、従来
のＺｒやＨｆよりも入手性に優れ、これに比べ約２〜３
倍の耐消耗性を有し、さらにＲｕ−Ｙ2Ｏ3電極と比べ
１．５〜２倍の耐消耗性を有し、また安定したアーク特
性を得ることの出来る優れたものである。この電極材料
は、プラズマ切断用として使用して十分にその特性が発
揮できるものである。As is clear from the above description,
According to Ru-La 2 O 3, Ru -CeO 2 and Ru- (La 2 O 3 + CeO 2) electrode composition range of the present invention, than conventional Zr or Hf excellent availability, about compared to 2 ~ 3
It has double the wear resistance and 1.5 to 2 times as much wear resistance as the Ru-Y 2 O 3 electrode, and it is an excellent one that can obtain stable arc characteristics. This electrode material can be used for plasma cutting and can sufficiently exhibit its characteristics.
【図１】試験装置の説明図である。FIG. 1 is an explanatory diagram of a test device.
【図２】試験装置のトーチ部分を拡大して示す説明図で
ある。FIG. 2 is an explanatory view showing an enlarged torch portion of the test apparatus.
【図３】組成と耐消耗性の関係を表わすグラフを示す図
である。FIG. 3 is a graph showing a relationship between composition and wear resistance.
１ トーチ ２ 電極 ３ 水冷銅板 1 Torch 2 Electrode 3 Water-cooled copper plate
フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｂ 1/02 Ｚ 7244−5Ｇ Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location H01B 1/02 Z 7244-5G
Claims (1)
ｕ）と、酸化ランタン（Ｌａ2Ｏ3）および酸化セリウム
（ＣｅＯ2）の少なくとも１種類を略２０〜７０容量％
含有するプラズマ切断用電極材料。1. Ruthenium (R) of approximately 30 to 80% by volume
u) and at least one kind of lanthanum oxide (La 2 O 3 ) and cerium oxide (CeO 2 ) is approximately 20 to 70% by volume.
An electrode material for plasma cutting containing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19926091A JPH0543909A (en) | 1991-08-08 | 1991-08-08 | Electrode material for plasma cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19926091A JPH0543909A (en) | 1991-08-08 | 1991-08-08 | Electrode material for plasma cutting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0543909A true JPH0543909A (en) | 1993-02-23 |
Family
ID=16404834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19926091A Pending JPH0543909A (en) | 1991-08-08 | 1991-08-08 | Electrode material for plasma cutting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0543909A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309882A (en) * | 2001-04-17 | 2002-10-23 | Sumitomo Electric Ind Ltd | Electrode for crusher and crusher |
-
1991
- 1991-08-08 JP JP19926091A patent/JPH0543909A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002309882A (en) * | 2001-04-17 | 2002-10-23 | Sumitomo Electric Ind Ltd | Electrode for crusher and crusher |
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