JPS62224495A - Tungsten electrode material - Google Patents
Tungsten electrode materialInfo
- Publication number
- JPS62224495A JPS62224495A JP6687786A JP6687786A JPS62224495A JP S62224495 A JPS62224495 A JP S62224495A JP 6687786 A JP6687786 A JP 6687786A JP 6687786 A JP6687786 A JP 6687786A JP S62224495 A JPS62224495 A JP S62224495A
- Authority
- JP
- Japan
- Prior art keywords
- tungsten
- oxide
- lanthanum
- electrode
- lanthanum oxide
- 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
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 24
- 239000010937 tungsten Substances 0.000 title claims abstract description 24
- 239000007772 electrode material Substances 0.000 title claims abstract description 16
- 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 description 37
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 6
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 6
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910003452 thorium oxide Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 2
- 238000010304 firing Methods 0.000 abstract 1
- 229910052746 lanthanum Inorganic materials 0.000 abstract 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 abstract 1
- 239000012857 radioactive material Substances 0.000 abstract 1
- 229910001930 tungsten oxide Inorganic materials 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 150000002604 lanthanum compounds Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical class O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- VGBPIHVLVSGJGR-UHFFFAOYSA-N thorium(4+);tetranitrate Chemical compound [Th+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VGBPIHVLVSGJGR-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 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)
- Powder Metallurgy (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は、良好なアーク点弧性と耐消耗性を有するタ
ングステン電極材料に関するものでおる。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tungsten electrode material having good arc ignition properties and wear resistance.
［従来の技術］
Ｔｌｌｌｌ重用電極電極材料には、アーク放電のための
熱的、電気的特性が要求されるが、なかでも特に重要な
ものは熱電子放出特性である。[Prior Art] Tllll heavy-duty electrode electrode materials are required to have thermal and electrical properties for arc discharge, among which thermionic emission properties are particularly important.
この熱電子放出特性を向上させるため、タングステンに
数パーセントの酸化物を添加することが行なわれてきた
。この添加用酸化物として従来広く使用されてきたのは
酸化トリウム（ＴｈＯ２）である。In order to improve this thermionic emission property, several percent of oxides have been added to tungsten. Thorium oxide (ThO2) has been widely used as this additive oxide.
［発明が解決しようとする問題点］
酸化トリウムを添加したいわゆるトリエーテッドタング
ステンは、純タングステン材料に較べて種々の点ですぐ
れているが、耐消耗性およびアーク点弧性の点で未で充
分なものではなく、しかも製造時に原料としてタングス
テン粉末に添加される酸化トリウム粉末や硝酸トリウム
が放射性物質であるため原料の入手が困難でコストが高
くつくとともに、保管や取扱いに厳重な管理が必要であ
るという問題点があった。[Problems to be solved by the invention] So-called thoriated tungsten added with thorium oxide is superior in various respects to pure tungsten material, but is still unsatisfactory in terms of wear resistance and arc ignition properties. What's more, the thorium oxide powder and thorium nitrate that are added to tungsten powder as raw materials during manufacturing are radioactive substances, making raw materials difficult to obtain and costly, and requiring strict storage and handling controls. There was a problem.
［問題点を解決するための手段］
本発明は、従来のトリエーテッドタングステンの上記問
題点を解決し、これに変わる電極材料を開発すべく種々
研究を重ねた結果完成されたもので、重量比で１．５〜
２．５％の酸化ランタンを含み、残部がタングステンで
あるタングステン電極材料をその要旨としている。[Means for Solving the Problems] The present invention was completed as a result of various studies to solve the above-mentioned problems of conventional thoriated tungsten and to develop an alternative electrode material. 1.5~
The gist is a tungsten electrode material containing 2.5% lanthanum oxide, with the balance being tungsten.
この電極材料は、例えば次のようにして製造される。先
ず原料となる金属タングステン粉末（たとえば平均粒度
２〜３ミクロン）に、ランタン化合物の水溶液を添加混
合し、水素雰囲気中で３００〜５００″Ｃで加熱して前
記添加化合物を分解させる。ランタン化合物としては、
硝酸化合物を好適に使用することができる。このように
、添加物を水溶液の形で散布し加熱分解する手法は従来
タングステン、モリブデン等の粉末冶金法においてドー
ピング工程に採用されているものである。This electrode material is manufactured, for example, as follows. First, an aqueous solution of a lanthanum compound is added to and mixed with metallic tungsten powder (for example, average particle size of 2 to 3 microns) as a raw material, and heated at 300 to 500"C in a hydrogen atmosphere to decompose the added compound. As a lanthanum compound. teeth,
Nitric acid compounds can be suitably used. As described above, the method of dispersing additives in the form of an aqueous solution and thermally decomposing them has been conventionally employed in the doping process in powder metallurgy of tungsten, molybdenum, and the like.
硝酸ランタンが添加されたタングステン粉末は、水素気
流中で９００〜１１００°Ｃに加熱して還元を行ない、
金属タングステン中に酸化ランタン（Ｌａ２０３）が均
一に分散した粉末が得られる。このようにして得られた
粉末を粉末冶金における常法に従ってプレス成型し焼結
したのち、スェージング、ドローイング等の必要な加工
を施して所望の電極材料とする。The tungsten powder to which lanthanum nitrate has been added is heated to 900-1100°C in a hydrogen stream to reduce it.
A powder in which lanthanum oxide (La203) is uniformly dispersed in metallic tungsten is obtained. The powder thus obtained is press-molded and sintered according to a conventional method in powder metallurgy, and then subjected to necessary processing such as swaging and drawing to obtain a desired electrode material.
この電極材料は、主成分であるタングステンのほか酸化
ランタンを含んでおり、耐消耗性とアーク点弧性にすぐ
れたものである。酸化ランタン（Ｌａ２０３）の含有量
は、１．５〜２．５％（重量％、以下同じ）の範囲とす
るのが好ましい。酸化ランタンの含有量は、０．５％程
度以上であれば耐消耗性やアーク点弧性の点で一応の効
果が得られるが、１．５％以上とすればその効果がより
顕著にあられれる。逆にこれを２．５％より多くしても
２．５％のものと同程度の効果しか認められず、しかも
製造上クラックや折損等の事故が多発してきわめて加工
しにくくなる。This electrode material contains lanthanum oxide in addition to tungsten, which is the main component, and has excellent wear resistance and arc ignition properties. The content of lanthanum oxide (La203) is preferably in the range of 1.5 to 2.5% (wt%, same hereinafter). If the content of lanthanum oxide is about 0.5% or more, a certain effect can be obtained in terms of wear resistance and arc ignition properties, but if the content is about 1.5% or more, the effect will be more noticeable. It will be done. On the other hand, even if the content is greater than 2.5%, the same effect as 2.5% is obtained, and moreover, accidents such as cracks and breakage occur frequently during manufacturing, making processing extremely difficult.
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］
平均粒度３゜５μ、純度９９．９％以上のタングステン
粉末に硝酸ランタンの水溶液を散布したのち充分混合し
た。添加する硝酸ランタンの量は、最終製品中の酸化ラ
ンタンの量が０．５％、１．０％、１．５％、２．０％
および２．５％となる旧とした。この混合粉末を水素雰
囲気中で加熱分解して硝酸ランタンを酸化ランタンとし
たのち、９００〜１１００’Ｃの温度勾配のある還元炉
を用い水素気流中で１．５時間加熱した。還元後の粉末
はは漬器と篩を通したのち、Ｖ形混合機でブレンドした
。[Example] An aqueous solution of lanthanum nitrate was sprinkled onto tungsten powder having an average particle size of 3.5 μm and a purity of 99.9% or more, and then thoroughly mixed. The amount of lanthanum nitrate added is 0.5%, 1.0%, 1.5%, 2.0% of lanthanum oxide in the final product.
and 2.5%. This mixed powder was thermally decomposed in a hydrogen atmosphere to convert lanthanum nitrate into lanthanum oxide, and then heated in a hydrogen stream for 1.5 hours using a reduction furnace with a temperature gradient of 900 to 1100'C. The reduced powder was passed through a pickler and a sieve, and then blended in a V-type mixer.
得られたタングステン（Ｗ＞−酸化ランタン（Ｌａ２０
３ ＞粉末を金型中で加圧して角棒状の圧粉体としたの
ち、常法に従って予焼結および通電焼結を行なって重さ
ｉｏｏｏｇのインゴットとした。The obtained tungsten (W>-lanthanum oxide (La20
3> The powder was pressed in a mold to form a rectangular bar-shaped green compact, and then pre-sintered and electrically sintered according to a conventional method to form an ingot weighing iooog.
通電焼結における焼結電流は溶断電流の約９０％とした
。このインゴットにスェージングとドローイングを施し
て最終的に丸棒状電極とした。The sintering current in the current sintering was approximately 90% of the fusing current. This ingot was subjected to swaging and drawing to finally form a round rod-shaped electrode.
得られた電極材料について、次に示す試験条件で高周波
ＴＩＧ溶接テストとアークスタート試験を行なった結果
は第１表に示す通りであった。第１図は試験装置をあら
れすもので直径Ｄ＝ １．６ｍ、長さ一１５０＃の電極
棒１（先端を４５度の角度で円錐状に尖らせた）をＴＩ
Ｇ溶接機のトーチに保持し、銅板（水冷）を母材２とし
てアルゴンガス（流量５〜６．１！ ／ｍｉｎ ）中で
アークスポット溶接を行なった。アーク長し＝３−１電
極長Ｄ’＝３Ｍであった。ＴＩＧ溶接テストは１５０Ａ
ｘ ３０分の条件で行なって消耗量を秤量し、アーク
スタート試験は設定電流２ＯＡでアーク時間１秒間、休
止時間１０秒間の条件で１００回の試験を行なった。ア
ークスタート試験結果中ＮＧはアークスタートが生じな
かったことをあられす。The obtained electrode material was subjected to a high frequency TIG welding test and an arc start test under the following test conditions, and the results are shown in Table 1. Figure 1 shows the test equipment, using an electrode rod 1 (with a conical tip at a 45 degree angle) with a diameter D = 1.6 m and a length of 150#.
The copper plate (water-cooled) was held in the torch of a G welding machine, and arc spot welding was performed in argon gas (flow rate 5 to 6.1!/min) using the copper plate (water-cooled) as the base material 2. Arc length=3-1 electrode length D'=3M. TIG welding test is 150A
x 30 minutes, and the amount of consumption was measured.The arc start test was conducted 100 times under the conditions of a set current of 2OA, an arc time of 1 second, and a rest time of 10 seconds. NG in the arc start test result means that no arc start occurred.
第１表かられかる通り、酸化ランタンを１．５〜２．５
％含有させたものは純タングステン（Ｗ＞のものに較べ
て耐消耗性、アークスタート性ともにすぐれていること
、およびこれらの中では酸化ランタンを２．０％含有さ
せたものの成績が最も良いことがわかる。As shown in Table 1, lanthanum oxide is 1.5 to 2.5
The one containing 2.0% lanthanum oxide has better wear resistance and arc startability than pure tungsten (W>), and among these, the one containing 2.0% lanthanum oxide has the best performance. I understand.
第２表は、タングステンに添加する酸化物として本発明
の酸化ランタンの他に酸化トリウム（ＴｈＯ２）、酸化
ジルコニウム（Ｚｒ０２）、酸化イツトリウム（Ｙ２Ｏ
２）、酸化セリウム（Ｃｅ０２）を取り上げ、これらを
添加した電極材料の性能を比較した結果をあられす。タ
ングステンに対する酸化物の添加母はいずれも２％であ
った。Table 2 shows that in addition to the lanthanum oxide of the present invention, thorium oxide (ThO2), zirconium oxide (Zr02), and yttrium oxide (Y2O) are added to tungsten.
2) Taking up cerium oxide (Ce02), we present the results of comparing the performance of electrode materials to which cerium oxide (Ce02) is added. The amount of oxide added to tungsten was 2% in all cases.
第２表中、各性能は順にＡ、Ｂ、Ｃ，Ｄ、Ｅの５段階で
評価し、「電極温度」はＡが最も低くＥが最も高く、「
消耗」はＡが最も低くＥＩｆｉ最も多く、「電極変形」
はＡが最も大きくＥが最も小さく、「アーク安定性」は
最もＡが高くＥが最も低いことをそれぞれあられす。第
２表かられかる通り、他の酸化化合物を添加したものに
較べて、酸化ランタンを添加したものは良好な性能を示
した。In Table 2, each performance is evaluated in 5 stages: A, B, C, D, and E. For "electrode temperature," A is the lowest, E is the highest, and "
"A consumption" is the lowest for A, and the highest for EIfi, and "electrode deformation"
For "Arc stability", A is the highest and E is the lowest, and A is the highest and E is the lowest. As can be seen from Table 2, those to which lanthanum oxide was added showed better performance than those to which other oxidizing compounds were added.
［発明の効果］
以上の説明から明らかなように、本発明にかかるタング
ステン電極材料は、純タングステン電極材料よりもはる
かにすぐれ、従来のトリエーテッドタングステンと同程
度以上のアーク点弧性および耐消耗性を有するものであ
る。しかも、酸化トリウムを使用しないので、取扱いや
管理上の安全性に問題はない。[Effects of the Invention] As is clear from the above description, the tungsten electrode material according to the present invention is far superior to pure tungsten electrode material, and has arc ignition properties and wear resistance comparable to or better than conventional thoriated tungsten. It is something that has a nature. Moreover, since thorium oxide is not used, there are no safety problems in handling or management.
なお、以上の説明では主としてＴＩＧ溶接用電極材料と
して用いる場合について説明したが、これを放電管、マ
グネトロンその他各種電子管用電極材料として使用する
こともできる。In the above description, the case where the material is mainly used as an electrode material for TIG welding has been explained, but it can also be used as an electrode material for discharge tubes, magnetrons, and other various electron tubes.
第１図は試験条件をあられす説明図である。 第１図 FIG. 1 is an explanatory diagram showing the test conditions. Figure 1
Claims (1)
、残部がタングステンであるタングステン電極材料。(1) A tungsten electrode material containing 1.5 to 2.5% by weight of lanthanum oxide, with the remainder being tungsten.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6687786A JPS62224495A (en) | 1986-03-24 | 1986-03-24 | Tungsten electrode material |
| DE19873701212 DE3701212A1 (en) | 1986-03-24 | 1987-01-16 | Tungsten electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6687786A JPS62224495A (en) | 1986-03-24 | 1986-03-24 | Tungsten electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62224495A true JPS62224495A (en) | 1987-10-02 |
Family
ID=13328543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6687786A Pending JPS62224495A (en) | 1986-03-24 | 1986-03-24 | Tungsten electrode material |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS62224495A (en) |
| DE (1) | DE3701212A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62286698A (en) * | 1986-06-03 | 1987-12-12 | Toho Kinzoku Kk | Tungsten electrode material |
| WO1994024327A1 (en) * | 1993-04-14 | 1994-10-27 | Toho Kinzoku Co., Ltd. | Tungsten-base electrode material |
| CN1060709C (en) * | 1998-06-25 | 2001-01-17 | 北京工业大学 | Ternary compound rare-earth tungsten electrode material and its preparing process |
| WO2011049049A1 (en) * | 2009-10-19 | 2011-04-28 | 日本タングステン株式会社 | Tungsten cathode material |
| JP2012203998A (en) * | 2011-03-23 | 2012-10-22 | Nippon Tungsten Co Ltd | Tungsten cathode material |
| US8420974B2 (en) | 1997-03-20 | 2013-04-16 | Tadahiro Ohmi | Long life welding electrode and its fixing structure, welding head, and welding method |
| CN105328178A (en) * | 2015-09-25 | 2016-02-17 | 北矿新材科技有限公司 | Preparation method of intermediate-frequency sintering thorium-tungsten billets |
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| CN117026047A (en) * | 2023-07-24 | 2023-11-10 | 湖南金博高新科技产业集团有限公司 | Tungsten filament base material for superfine diamond wire and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3835328C1 (en) * | 1988-10-17 | 1989-12-14 | Gesellschaft Fuer Wolfram-Industrie Mbh, 8220 Traunstein, De | |
| EP0606491A1 (en) * | 1992-07-31 | 1994-07-20 | Toho Kinzoku Co., Ltd. | Tungsten electrode material |
| JP3420658B2 (en) * | 1995-06-30 | 2003-06-30 | 株式会社東芝 | TIG welding method and its welding torch |
| US5604321A (en) * | 1995-07-26 | 1997-02-18 | Osram Sylvania Inc. | Tungsten-lanthana alloy wire for a vibration resistant lamp filament |
| US5590386A (en) * | 1995-07-26 | 1996-12-31 | Osram Sylvania Inc. | Method of making an alloy of tungsten and lanthana |
| DE19738574A1 (en) * | 1997-09-04 | 1999-03-11 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electrode and method and apparatus for making the same |
| US7170032B2 (en) * | 2003-11-20 | 2007-01-30 | Tri Tool Inc. | Process for welding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6293075A (en) * | 1985-10-19 | 1987-04-28 | Daihen Corp | Non-consumable electrode arc welding method |
-
1986
- 1986-03-24 JP JP6687786A patent/JPS62224495A/en active Pending
-
1987
- 1987-01-16 DE DE19873701212 patent/DE3701212A1/en not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6293075A (en) * | 1985-10-19 | 1987-04-28 | Daihen Corp | Non-consumable electrode arc welding method |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62286698A (en) * | 1986-06-03 | 1987-12-12 | Toho Kinzoku Kk | Tungsten electrode material |
| WO1994024327A1 (en) * | 1993-04-14 | 1994-10-27 | Toho Kinzoku Co., Ltd. | Tungsten-base electrode material |
| US8420974B2 (en) | 1997-03-20 | 2013-04-16 | Tadahiro Ohmi | Long life welding electrode and its fixing structure, welding head, and welding method |
| CN1060709C (en) * | 1998-06-25 | 2001-01-17 | 北京工业大学 | Ternary compound rare-earth tungsten electrode material and its preparing process |
| WO2011049049A1 (en) * | 2009-10-19 | 2011-04-28 | 日本タングステン株式会社 | Tungsten cathode material |
| CN102378667A (en) * | 2009-10-19 | 2012-03-14 | 日本钨合金株式会社 | Tungsten cathode material |
| JP5379863B2 (en) * | 2009-10-19 | 2013-12-25 | 日本タングステン株式会社 | Discharge method |
| US8758652B2 (en) | 2009-10-19 | 2014-06-24 | Nippon Tungsten Co., Ltd. | Tungsten cathode material |
| CN102378667B (en) * | 2009-10-19 | 2014-09-10 | 日本钨合金株式会社 | Tungsten cathode material |
| JP2012203998A (en) * | 2011-03-23 | 2012-10-22 | Nippon Tungsten Co Ltd | Tungsten cathode material |
| CN105364342A (en) * | 2014-08-07 | 2016-03-02 | 张建生 | Inner gas outlet welding gun connector |
| CN105328178A (en) * | 2015-09-25 | 2016-02-17 | 北矿新材科技有限公司 | Preparation method of intermediate-frequency sintering thorium-tungsten billets |
| CN105328178B (en) * | 2015-09-25 | 2017-10-31 | 北矿新材科技有限公司 | A kind of preparation method of Median frequency sintering thorium tungsten strip |
| CN107190195A (en) * | 2017-05-04 | 2017-09-22 | 鹤山市沃得钨钼实业有限公司 | A kind of W-REO alloys crucible and its manufacture method |
| CN117026047A (en) * | 2023-07-24 | 2023-11-10 | 湖南金博高新科技产业集团有限公司 | Tungsten filament base material for superfine diamond wire and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3701212A1 (en) | 1987-10-15 |
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