JPH01218796A - Tungsten arc electrode - Google Patents
Tungsten arc electrodeInfo
- Publication number
- JPH01218796A JPH01218796A JP4534788A JP4534788A JPH01218796A JP H01218796 A JPH01218796 A JP H01218796A JP 4534788 A JP4534788 A JP 4534788A JP 4534788 A JP4534788 A JP 4534788A JP H01218796 A JPH01218796 A JP H01218796A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- tungsten
- potassium
- concn
- range
- 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
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 36
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000010937 tungsten Substances 0.000 title claims abstract description 35
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 17
- 239000011591 potassium Substances 0.000 claims abstract description 17
- 238000003466 welding Methods 0.000 abstract description 7
- 239000011148 porous material Substances 0.000 abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003657 tungsten Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/222—Non-consumable electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野〕
本発明は、ＴＩＧ溶接やプラズマ溶接に用いられるタン
グステン電極に関する。さらに詳細には比較的低電流で
用いられる純タングステン電極の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tungsten electrode used in TIG welding and plasma welding. More specifically, the present invention relates to improvements in pure tungsten electrodes used at relatively low currents.
ＴＩＧ溶接やプラズマ溶接に用いられるアーク放電電極
には、従来よりタングステンが用いられてきた。特に、
トリア入りタングステン電極は、優れた電極材料として
一般に広く使用されているが、被溶接物がアルミニウム
やその合金のような比較的低い温度で溶接される場合に
は、トリア入りタングステン電極は耐消耗性、アーク安
定性等に問題が存る。このため、この用途には一般に純
タングステンが用いられているが、耐消耗性に関して、
その特性はまだ十分とは言えない。Tungsten has traditionally been used for arc discharge electrodes used in TIG welding and plasma welding. especially,
Thoriated tungsten electrodes are generally widely used as an excellent electrode material, but when the workpiece is welded at relatively low temperatures, such as aluminum or its alloys, thorated tungsten electrodes have poor wear resistance. , there are problems with arc stability, etc. For this reason, pure tungsten is generally used for this purpose, but in terms of wear resistance,
Its characteristics cannot be said to be sufficient yet.
［発明の目的］
本発明は、比較的低い温度で使用される純タングステン
電極の耐消耗性の改良を目的とする。OBJECTS OF THE INVENTION The present invention aims to improve the wear resistance of pure tungsten electrodes used at relatively low temperatures.
１問題点を解決するための手段・作用〕本発明は、タン
グステンにカリウムを１０〜５０ｐｐｍ （質量濃度
、以下同様）含有させたことを特徴とするタングステン
・アーク電極を提供しようトスるもので、通常の純タン
グステン電極に較べ耐消耗性に優れる。[Means and effects for solving the first problem] The present invention aims to provide a tungsten arc electrode characterized in that tungsten contains 10 to 50 ppm (mass concentration, the same applies hereinafter) of potassium. Superior wear resistance compared to ordinary pure tungsten electrodes.
通常、タングステン電極は、タングステン粉末をプレス
・焼結して得られるインゴントを転打加工あるいは線引
きすることにより得られる。Generally, tungsten electrodes are obtained by rolling or drawing an ingon obtained by pressing and sintering tungsten powder.
タングステン中のカリウムは加工途中において軸方向に
長く伸ばされ、微細なバブルの列となって再結晶時の粒
界の移動を阻止することが知られている。アーク放電電
極の消耗に関して、そのメカニズムの詳細は明らかでは
ないが、後述するように電極の再結晶粒の形状ならびに
、ポアーの形成が１つの重要な役割りをはたしているの
４ではないかと推察される。It is known that potassium in tungsten is elongated in the axial direction during processing, forming a row of fine bubbles that prevent grain boundaries from moving during recrystallization. Although the details of the mechanism regarding the wear and tear of arc discharge electrodes are not clear, it is speculated that the shape of the electrode's recrystallized grains and the formation of pores play an important role, as will be explained later. Ru.
以下、本発明を実施例により詳細に説明する。 Hereinafter, the present invention will be explained in detail with reference to Examples.
通常の純タングステンならびにカリウム含有量の異なる
各種タングステン粉末をそれぞれ圧力約１．３ｔ／ｃＩ
Ｉｌでプレス成形し、水素雰囲気中で溶断電流の約９０
％の電流を流して通電焼結した。得られたインゴットを
通常公知の方法により、スェージ加工し、さらにセンタ
レス加工して最終的に直径２．３〜２．４ ｍｍのタン
グステン電極を得た。タングステン電極の比重は１９．
１〜１９．２であった。Normal pure tungsten and various tungsten powders with different potassium contents are each pressed at a pressure of approximately 1.3t/cI.
Press-formed with Il, with a fusing current of about 90% in a hydrogen atmosphere.
% current was applied to conduct sintering. The obtained ingot was swaged and then centerless processed using a commonly known method to finally obtain a tungsten electrode having a diameter of 2.3 to 2.4 mm. The specific gravity of the tungsten electrode is 19.
It was 1 to 19.2.
得られた電極は、その先端を角度４５°に研磨した後、
水冷銅板を基板としてアークテストを実施した。試験条
件は、電流１１０Ａ、アーク時間６０分、アルゴンガス
流量７１ ／ｍｉｎ 、電極先端とノズルの距離３ｍｍ
、電極先端と基板の距離４ＩＩＩＩ１１として各試験片
のテスト条件はすべて同一とした。After polishing the tip of the obtained electrode to an angle of 45°,
Arc tests were conducted using a water-cooled copper plate as a substrate. Test conditions were: current 110A, arc time 60 minutes, argon gas flow rate 71/min, distance between electrode tip and nozzle 3mm.
, the distance between the electrode tip and the substrate was 4III11, and the test conditions for each test piece were all the same.
第１図にタングステン電極のカリウム含有量と消耗量の
関係を示す。第１図から明らかなようにカリウム含有量
１０ｐｐｍ未満ならびに５ｏｐｐｍを越える電極では消
耗量が大きい。本発明のカリウム含有Ｎ１０〜５Ｑｐｐ
ｍの電極は従来の純タングステン電極に較べ、その消耗
量は約２以下であり、耐消耗性に優れている。FIG. 1 shows the relationship between the potassium content and the consumption amount of the tungsten electrode. As is clear from FIG. 1, electrodes with a potassium content of less than 10 ppm and more than 5 oppm have a large amount of consumption. Potassium-containing N10-5Qpp of the present invention
The amount of wear of the m electrode is about 2 or less compared to the conventional pure tungsten electrode, and it has excellent wear resistance.
次に、第２図に使用後の電極の断面組織写真を示す。第
２図（ａ）は本発明の実施例でカリウム含有量１９ｐ’
ｐＴｈのもの、（ｂ）ならびに（Ｃ）は比較例で（ｂ）
は純タングステン、（Ｃ）はカリウム含有量６３ｐｐＩ
１１のタングステン電極である。第２図によると、比較
例の（ｂ）、（Ｃ）は本発明のタングステン電極（ａ）
に較べ粒界のポアーが多く観察される。通常、カリウム
含有量が５０ｐｐｍを越えると、ポアーが多く観察され
るようになる。Next, FIG. 2 shows a photograph of the cross-sectional structure of the electrode after use. Figure 2(a) shows an example of the present invention with a potassium content of 19p'.
pTh, (b) and (C) are comparative examples; (b)
is pure tungsten, (C) is potassium content 63 ppI
11 tungsten electrodes. According to FIG. 2, (b) and (C) of the comparative example are the tungsten electrode (a) of the present invention.
More pores at the grain boundaries are observed than in the previous example. Usually, when the potassium content exceeds 50 ppm, many pores are observed.
以上述べてきたように、本発明のタングステン電極は従
来の純タングステン電極に較べてその耐消耗性が大きく
改良されており、その工業的利用価値は大きい。As described above, the tungsten electrode of the present invention has greatly improved wear resistance compared to conventional pure tungsten electrodes, and has great industrial utility value.
第１図は、電極の消耗量を比較した図、第２図は、代表
的な電極の断面組織写真を示したものである。
特許出願人 日本タングステン株式会社Ｋ ｌ）
ｔ）ｍ
第１図
（Ｃ） ０．１ｍｍ
第２図
手＆に主甫正書（方式）
％式％
１、事件の表示
昭和６３年特許願第４５３４７号
２、発明の名称
タングステン・アーク電極
３、補正をする者
４、補正命令の日付
６、補正の内容
（１）明細書第４頁第８行の１第２図に」から第１３行
の「に較べ粒界」までを１第２図から第４図に使用後の
代表的な電極の断面の金属組織を示す。
第２図は本発明の実施例でカリウＪ、含有量１９ｐｐｍ
のもの、第３図と第４図は比較例で、第３図は純タング
ステン、第４図はカリウム含有量６３ｐｐｍのタングス
テン電極である。これによると、比較例の第３図と第４
図は本発明のタングステン電極第２図に較べ粒界Ｊに補
正する。
（２）明細書第５頁第３行の「第２図１から第４行の「
写真を」までを「第２回は、本発明のカリウム含有量１
９ｐｐｍの電極の断面の金属組織、第３図は、比較例の
純タングステン電極の断面の金属組織、第４図は、比較
例のカリウム含有量６３ｐｐｍのタングステン電極の断
面の金属組織を」に補正する。
（３）図面中箱２図を別紙のとおりに補正し、第３図お
よび第４図を追加する。
０．１ｍｍ
０．１ｍｍ
トー−＋
第４図
０．１ｍｍ
トー−−→
第３図FIG. 1 is a diagram comparing the amount of wear of the electrodes, and FIG. 2 is a photograph of the cross-sectional structure of a typical electrode. Patent applicant: Nippon Tungsten Co., Ltd.
t) m Figure 1 (C) 0.1mm Figure 2 Hand & Ni Main Fu Orthographic (Method) % Formula % 1. Indication of the incident 1988 Patent Application No. 45347 2. Name of the invention Tungsten Arc Electrode 3. Person making the amendment 4. Date of the amendment order 6. Contents of the amendment (1) From page 4 of the specification, line 8, 1. FIGS. 2 to 4 show the metal structure of the cross section of a typical electrode after use. Figure 2 shows an example of the present invention, containing potassium J, with a content of 19 ppm.
3 and 4 are comparative examples, in which FIG. 3 is a pure tungsten electrode and FIG. 4 is a tungsten electrode with a potassium content of 63 ppm. According to this, Figures 3 and 4 of the comparative example
The figure has been corrected to the grain boundary J compared to the tungsten electrode of the present invention in Figure 2. (2) ``In lines 1 to 4 of Figure 2'' on page 5, line 3 of the specification.
In the second article, the potassium content of the present invention is 1.
Figure 3 shows the cross-sectional metallographic structure of a pure tungsten electrode of a comparative example, and Figure 4 shows the cross-sectional metallographic structure of a tungsten electrode of a comparative example with a potassium content of 63 ppm. do. (3) Correct Box 2 in the drawing as shown in the attached sheet, and add Figures 3 and 4. 0.1mm 0.1mm Toe-+ Fig. 4 0.1mm Toe--→ Fig. 3
Claims (1)
濃度）含有させたことを特徴とするタングステン・アー
ク電極。1. A tungsten arc electrode characterized by containing 10 to 50 ppm (mass concentration) of potassium in tungsten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4534788A JPH01218796A (en) | 1988-02-26 | 1988-02-26 | Tungsten arc electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4534788A JPH01218796A (en) | 1988-02-26 | 1988-02-26 | Tungsten arc electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01218796A true JPH01218796A (en) | 1989-08-31 |
Family
ID=12716748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4534788A Pending JPH01218796A (en) | 1988-02-26 | 1988-02-26 | Tungsten arc electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01218796A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008264919A (en) * | 2007-04-19 | 2008-11-06 | Koyo Mach Ind Co Ltd | Discharge truing electrode, discharge truing device, and grinding device |
| WO2013190885A1 (en) * | 2012-06-22 | 2013-12-27 | 昭和電工株式会社 | Positive electrode body for solid electrolytic capacitor |
-
1988
- 1988-02-26 JP JP4534788A patent/JPH01218796A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008264919A (en) * | 2007-04-19 | 2008-11-06 | Koyo Mach Ind Co Ltd | Discharge truing electrode, discharge truing device, and grinding device |
| WO2013190885A1 (en) * | 2012-06-22 | 2013-12-27 | 昭和電工株式会社 | Positive electrode body for solid electrolytic capacitor |
| JP5613861B2 (en) * | 2012-06-22 | 2014-10-29 | 昭和電工株式会社 | Solid electrolytic capacitor anode body |
| US9892861B2 (en) | 2012-06-22 | 2018-02-13 | Showa Denko K.K. | Anode body for solid electrolytic capacitor |
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