JPS616263A - Surface treatment of tungsten electrode for corona discharge - Google Patents

Surface treatment of tungsten electrode for corona discharge

Info

Publication number
JPS616263A
JPS616263A JP12776984A JP12776984A JPS616263A JP S616263 A JPS616263 A JP S616263A JP 12776984 A JP12776984 A JP 12776984A JP 12776984 A JP12776984 A JP 12776984A JP S616263 A JPS616263 A JP S616263A
Authority
JP
Japan
Prior art keywords
electrode
graphite
corona discharge
wire
tungsten
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.)
Granted
Application number
JP12776984A
Other languages
Japanese (ja)
Other versions
JPS623233B2 (en
Inventor
Hiroshi Kato
博 加藤
Kuniji Matsumoto
松本　邦司
Yoichi Futami
洋一 二見
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KAIYOUSHIYA KK
Original Assignee
KAIYOUSHIYA KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KAIYOUSHIYA KK filed Critical KAIYOUSHIYA KK
Priority to JP12776984A priority Critical patent/JPS616263A/en
Publication of JPS616263A publication Critical patent/JPS616263A/en
Publication of JPS623233B2 publication Critical patent/JPS623233B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/02—Pretreatment of the material to be coated
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • H05B7/08—Electrodes non-consumable

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

PURPOSE:To form a thick oxide film on the surface of a W electrode in a short time by coating said surface with graphite, then heating and oxidizing said material at high temp. in air in manufacturing the W electrode for corona discharge. CONSTITUTION:The coated film of oxide is formed on the surface of said electrode to aim the prevention of physical variation in the W wire during operation temp., stable output and improvement of service life. Therefore, treating liquid contg. 3-6% graphite as solid component is coated on the surface of W wire before drawing it to the electrode. Said wire is drawn by die to the aimed diameter, then fed in heating furnace such as electric furnace, and heated to 900- 1,000 deg.C while passing through furnace at 7-12m velocity per min. By the heat treatment, the coated layer of graphite is removed, the surface of W wire is oxidized resulting in tungsten oxide film having 0.002-0.004mm. thickness, and the W electrode for corona discharge having good corona discharge generating state and long service life is obtained.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は複写ｍなどの光源として使用されるコロナ放
電用タングステン電極の表面処理する方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for surface treating a tungsten electrode for corona discharge used as a light source for copying machines and the like.

（従来の技術） タングステンをコロナ放電用電極として用いる技術は、
特公昭５３−２８０９９号公報に開示されている。(Prior art) The technology of using tungsten as an electrode for corona discharge is as follows:
It is disclosed in Japanese Patent Publication No. 53-28099.

この従来技術では、動作温度時のタングステン線内の物
理的変化の防止と、安定した出力及び寿命の向上等を、
酸化タングステン皮膜の形成にＪ、って図っている。This conventional technology prevents physical changes in the tungsten wire at operating temperatures, stabilizes output, and improves lifespan.
J is designed to form a tungsten oxide film.

（発明が解決しようとする問題点） しかしながら、従来技術では空気中にてタングステンの
みを高温加熱しているだけであるから、酸化被膜の形成
に時間を要し、短時間にて酸化被膜を厚く形成して、性
能を更に一段と向上さけるには至らぬものであった。(Problem to be solved by the invention) However, in the conventional technology, only tungsten is heated to high temperature in air, so it takes time to form an oxide film, and the oxide film can be thickened in a short time. However, it was not possible to improve the performance even further.

この発明は［記従来の問題点を解決するために考えられ
たものであって、従来技術と同様に空気中にてタングス
テンを高温加熱して酸化被膜を形成するものでありなが
ら、短時間にて酸化被膜を厚く形成づることができる新
たな表面処理１人を提供しようとするものである。This invention was devised to solve the problems of the conventional technology described above, and although it forms an oxide film by heating tungsten at high temperature in air like the conventional technology, it can be done in a short time. The present invention aims to provide a new surface treatment method that can form a thick oxide film.

（問題点を解決するための手段） 上記目的によるこの発明は、タングステン電極の表面を
黒鉛により被覆し、その黒鉛と」（にタングステン電極
を空気中にて高温加熱して酸化処理を行うものである。(Means for Solving the Problems) This invention for the above purpose coats the surface of a tungsten electrode with graphite, and oxidizes the graphite by heating the tungsten electrode at high temperature in air. be.

−１−２黒鉛被覆は、タングステンが電極に線引き加］
される前の線材の状態にあるとき、黒鉛含有液に浸して
行われる。-1-2 Graphite coating has tungsten wire drawn on the electrode]
This is done by immersing the wire in a graphite-containing liquid before it is processed.

このようなタングステン表面の黒鉛処理は、電球などに
使用されるタングステン線材の線引き加工に際して行わ
れていることであるが、そのような場合の目的はダイス
保護とタングステン線材におｔノるダイス傷及び酸化防
止とにあって、表面を被覆する黒鉛は、フィラメント加
工時に剥離するように調整されている。This type of graphite treatment on the tungsten surface is carried out during the drawing process of tungsten wire used in light bulbs, etc., but the purpose in such cases is to protect the die and prevent any die scratches on the tungsten wire. For the purpose of preventing oxidation, the graphite coating the surface is adjusted so that it will peel off during filament processing.

この発明におけるタングステン表面の黒鉛処理は、線引
き加工後におけるタングステン表面の加熱処理を効率よ
く行うためになすものであるから、線引き加Ｘ　ＩＦ、
ｊの保護を目的とザる従来処理とは巽なって、処理液の
黒鉛含有量は、タングステン電極の高温加熱時にも剥離
しない被覆が得られる範囲、即ち固形分で３〜６％の範
囲に限定される。The graphite treatment of the tungsten surface in this invention is performed in order to efficiently heat the tungsten surface after the wire drawing process.
In contrast to conventional treatments that aim to protect the tungsten electrode, the graphite content of the treatment liquid is kept within a range of 3 to 6% solid content, which provides a coating that does not peel off even when the tungsten electrode is heated to high temperatures. Limited.

もし黒鉛の含有量が６％を超えると、タングステン表面
への黒鉛付着量が増し、被覆は線引き加工後に剥離し易
いものとなる。また含有量が３％に満たない場合には、
所望する黒鉛被覆が１！１られ＜１い。If the graphite content exceeds 6%, the amount of graphite adhering to the tungsten surface will increase and the coating will easily peel off after wire drawing. In addition, if the content is less than 3%,
The desired graphite coating is 1!1<1.

黒鉛被覆を施したのちのタングステンＦＩｌ＋Ａは、ダ
イスを用いて所要線（￥、たとえば０．０５〜０．１２
φの電極に線引き加工され、更に電気炉を用いて空気中
にて高温加熱される。この加熱は９００〜１０００℃の
温度範囲で、毎分７〜１２ｍの速度にて行う。Tungsten FIl+A after being coated with graphite is cut into the required line (¥, for example 0.05 to 0.12
The wire is drawn into a φ electrode, and then heated to high temperature in air using an electric furnace. This heating is carried out at a temperature range of 900-1000° C. and at a speed of 7-12 m/min.

この加熱処理により黒鉛被覆はｔｘ　＜なり、電極表面
は酸化されてそこに厚さ０．００２〜０．００４ｎｉａ
＋の酸化被膜が生ずる。Through this heat treatment, the graphite coating becomes tx <, and the electrode surface is oxidized to a thickness of 0.002 to 0.004 nia.
A positive oxide film is formed.

（実施例） （１）黒鉛処理液 黒鉛（固形分）５．０％ 水　　　　　　　　　　　　　　　　　　　　　９５．
０％粘度（ビスメトロン粘度計）１８０ （２）加熱条件（電気炉） 電極（直径１ＩＩＩｌ）　　温度（℃）　　速度（１／
分）０．０５　　　　　９０’０　　　　１００．０７
　　　　　９５０　　　　１００．０９　　　　　　　
１０００　　　　　　１０（３）形成被膜 酸化タングステン被膜（ＷＯ３）　　９０％被膜厚さく
＋＋Ｖ） ０．００２〜０．０２５ （発明の効果） この発明は上述のように、黒鉛被膜と共にタングステン
電極を高温加熱して、電極表面を酸化処理してなるもの
であるから、所望厚さの酸化タングステン被膜を短時間
で形成することができる。(Example) (1) Graphite treatment liquid Graphite (solid content) 5.0% water 95.
0% viscosity (Bismetron viscometer) 180 (2) Heating conditions (electric furnace) Electrode (diameter 1IIIl) Temperature (°C) Speed (1/
minute) 0.05 90'0 100.07
950 100.09
1000 10(3) Formation film Tungsten oxide film (WO3) 90% film thickness ++V) 0.002 to 0.025 (Effects of the invention) As described above, this invention heats the tungsten electrode together with the graphite film at high temperature. Since the electrode surface is oxidized, a tungsten oxide film of a desired thickness can be formed in a short time.

またそこに得られたタングステン電極は、高電圧、電流
に耐え、コロナ放電の発生状態も良好で長時間の使用に
も耐えるなどの特長を有する。The tungsten electrode obtained there also has features such as being able to withstand high voltages and currents, producing good corona discharge, and being able to withstand long-term use.

Claims (1)

【特許請求の範囲】[Claims] 固形分３〜６％の黒鉛含有液を使用して、タングステン
線材に黒鉛被覆を施し、このタングステン線材を線引き
により所要直径の黒鉛被覆を有する電極に加工したのち
、９００〜１０００℃の温度に加熱して、タングステン
電極の表面に酸化皮膜を形成してなることを特徴とする
コロナ電極用タングステン電極の表面処理法。A graphite-containing liquid with a solid content of 3 to 6% is used to coat a tungsten wire with graphite, and this tungsten wire is drawn to form an electrode with a graphite coating of the required diameter, and then heated to a temperature of 900 to 1000°C. A method for surface treatment of a tungsten electrode for a corona electrode, characterized in that an oxide film is formed on the surface of the tungsten electrode.
JP12776984A 1984-06-21 1984-06-21 Surface treatment of tungsten electrode for corona discharge Granted JPS616263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12776984A JPS616263A (en) 1984-06-21 1984-06-21 Surface treatment of tungsten electrode for corona discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12776984A JPS616263A (en) 1984-06-21 1984-06-21 Surface treatment of tungsten electrode for corona discharge

Publications (2)

Publication Number Publication Date
JPS616263A true JPS616263A (en) 1986-01-11
JPS623233B2 JPS623233B2 (en) 1987-01-23

Family

ID=14968235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12776984A Granted JPS616263A (en) 1984-06-21 1984-06-21 Surface treatment of tungsten electrode for corona discharge

Country Status (1)

Country Link
JP (1) JPS616263A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003018249A1 (en) * 2001-07-16 2003-03-06 Plansee Aktiengesellschaft Welding electrode made of tungsten or a tungsten alloy
US6605165B2 (en) * 1999-05-28 2003-08-12 Canon Kabushiki Kaisha Method of manufacturing discharge wire
WO2023153089A1 (en) * 2022-02-10 2023-08-17 パナソニックＩｐマネジメント株式会社 Tungsten wire and metal mesh

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840395A (en) * 1981-09-03 1983-03-09 Toshiba Corp Drawing of tungsten or molybdenum wire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840395A (en) * 1981-09-03 1983-03-09 Toshiba Corp Drawing of tungsten or molybdenum wire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6605165B2 (en) * 1999-05-28 2003-08-12 Canon Kabushiki Kaisha Method of manufacturing discharge wire
US6917776B2 (en) 1999-05-28 2005-07-12 Canon Kabushiki Kaisha Discharge wire, method of manufacturing discharge wire and electrification device
WO2003018249A1 (en) * 2001-07-16 2003-03-06 Plansee Aktiengesellschaft Welding electrode made of tungsten or a tungsten alloy
WO2023153089A1 (en) * 2022-02-10 2023-08-17 パナソニックＩｐマネジメント株式会社 Tungsten wire and metal mesh

Also Published As

Publication number Publication date
JPS623233B2 (en) 1987-01-23

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