JPH032219B2 - - Google Patents
Info
- Publication number
- JPH032219B2 JPH032219B2 JP28823985A JP28823985A JPH032219B2 JP H032219 B2 JPH032219 B2 JP H032219B2 JP 28823985 A JP28823985 A JP 28823985A JP 28823985 A JP28823985 A JP 28823985A JP H032219 B2 JPH032219 B2 JP H032219B2
- Authority
- JP
- Japan
- Prior art keywords
- tungsten
- electrode
- powder
- yttrium oxide
- yttrium
- 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.)
- Expired
Links
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 23
- 229910052721 tungsten Inorganic materials 0.000 claims description 19
- 239000010937 tungsten Substances 0.000 claims description 19
- 239000007772 electrode material Substances 0.000 claims description 10
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 10
- 239000000843 powder Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910003452 thorium oxide Inorganic materials 0.000 description 3
- 229910052727 yttrium Inorganic materials 0.000 description 3
- -1 yttrium compound Chemical class 0.000 description 3
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 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
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 235000005039 Brassica rapa var. dichotoma Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 244000130745 brown sarson Species 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 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
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 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
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 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)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
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あ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tungsten electrode material having good arc ignition properties and wear resistance.
電極、TIG溶接用電極等の材料として、酸化ト
リウムを添加したタングステン材料すなわトリエ
ーテツドタングステンが使用されている。
Tungsten material to which thorium oxide is added, ie, thoriated tungsten, is used as a material for electrodes, TIG welding electrodes, etc.
トリエーテツドタングステンは耐消耗性および
アーク点弧性にすぐれたものであるが、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
う問題点があつた。
Triated tungsten has excellent wear resistance and arc ignition properties, but thorium oxide powder and thorium nitrate, which are added to tungsten powder as raw materials during manufacturing, are radioactive substances, making raw materials difficult to obtain and costly. There were problems in that it was expensive and required strict management for storage and handling.
本発明は、従来のトリエーテツドタングステン
の上記問題点を解決し、これに代わる電極材料を
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0.2〜3.0％の酸化イツトリウムを含
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。
The present invention was completed as a result of various studies aimed at solving the above-mentioned problems of conventional thoriated tungsten and developing an alternative electrode material. The gist is a tungsten electrode material in which the remaining portion is 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、イツトリウ
ム化合物の水溶液を添加混合し、水素雰囲気中で
300〜500℃で加熱して前記添加化合物を分解させ
る。イツトリウム化合物としては、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治金法におい
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 an yttrium 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 then mixed in a hydrogen atmosphere.
The additive compound is decomposed by heating at 300-500°C. As the yttrium compound, a nitrate compound 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.
イツトリウムの添加されたタングステン粉末
は、水素気流中で900〜1100℃に加熱して還元を
行ない、金属タングステン中に酸化イツトリウム
（Y2O3）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治金における常法
に従つてプレス成形し焼結したのち、スエージン
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 yttrium has been added is heated to 900 to 1100° C. in a hydrogen stream to reduce it, and a powder in which yttrium oxide (Y 2 O 3 ) is uniformly dispersed in metallic tungsten is obtained. The powder thus obtained is press-formed 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
ほか酸化イツトリウムを含んでおり、耐消耗性と
アーク点弧性にすぐれたものである。酸化イツト
リウムの含有量は、0.2〜3.0重量％の範囲とする
のが好ましい。酸化イツトリウム含有量が0.2％
よりも低い場合は、性能的にこれを含有しない純
タングステンとほぼ同程度となる。逆にこれを
3.0％より多くしても3.0％のものと同程度の効果
しか認められず、しかも製造上クラツクや折損等
の事故が多発してきわめて加工しにくくなる。 This electrode material contains yttrium oxide in addition to the main component tungsten, and has excellent wear resistance and arc ignition properties. The content of yttrium oxide is preferably in the range of 0.2 to 3.0% by weight. Yttrium oxide content is 0.2%
If it is lower than , the performance will be almost the same as that of pure tungsten that does not contain it. On the contrary, this
Even if the amount is more than 3.0%, it will only be as effective as 3.0%, and moreover, accidents such as cracks and breakage will occur frequently during manufacturing, making it extremely difficult to process.
なお、本発明にかかる電極材料は、TIG溶接用
電極材料以外の例えば放電管、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がで
きる。 Note that the electrode material according to the present invention can be used as an electrode material for discharge tubes, magnetrons, and various other electron tubes other than TIG welding electrode materials.
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.
平均粒度3.5μ、純度99.9％以上のタングステン
粉末に硝酸イツトリウムの水溶液を散布したのち
充分混合した。添加する硝酸イツトリウムの量
は、最終製品中の酸化イツトリウムの量が１％お
よび２％となる量とした。この混合粉末を水素雰
囲気中で加熱分解して酸化イツトリウムとしたの
ち、900〜1100℃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
擂潰器と篩を通したのち、Ｖ形混合機でブレンド
した。
An aqueous solution of yttrium nitrate was sprinkled onto tungsten powder with an average particle size of 3.5μ and a purity of 99.9% or higher, and then thoroughly mixed. The amount of yttrium nitrate added was such that the amount of yttrium oxide in the final product was 1% and 2%. This mixed powder was thermally decomposed in a hydrogen atmosphere to produce yttrium 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 crusher and a sieve, and then blended using a V-type mixer.
得られたタングステン（Ｗ）−酸化イツトリウ
ム（Y2O3）粉末を金型中で加圧して角棒状の圧
粉体としたのち、常法に従つて予焼結および通電
焼結を行なつて重さ1000ｇのインゴツトとした。
通電焼結における焼結電流は溶断電流の約90％と
した。このインゴツトにスエ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 obtained tungsten (W)-yttrium oxide (Y 2 O 3 ) powder was pressurized in a mold to form a rectangular bar-shaped green compact, and then pre-sintered and electrically sintered according to conventional methods. It was made into an ingot weighing 1000g.
The sintering current during 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.
得られた直径3.2mm、酸化イツトリウム含有量
２％の電極について高周波による点弧性を調べた
結果は第１図の通りであつた。試験方法は、前も
つて電極間に直流回路電圧（O.C.V.）を印加し
ておき、10秒間高周波を印加して、そのまま定常
アークへ移行するかどうかを調べた。トーチー水
冷銅陽極間のO.C.V.を種々変化させ、各30回の
点弧を試みた。同図には比較のため純タングステ
ン電極と２％トリヤ（ThO2）含有のタングステ
ン電極のデータを併記した。同図からわかる通
り、酸化イツトリウムを含有する電極は点弧性に
おいてトリエーテツドタングステン電極に勝ると
も劣らない成績を示した。 The ignitability of the resulting electrode, which had a diameter of 3.2 mm and a yttrium oxide content of 2%, was investigated under high frequency waves, and the results were as shown in FIG. The test method was to first apply a direct current circuit voltage (OCV) between the electrodes, then apply high frequency for 10 seconds to see if the arc would shift to a steady state. The OCV between the torch water-cooled copper anode was varied, and 30 firings were attempted each time. The figure also shows data for a pure tungsten electrode and a tungsten electrode containing 2% thoria (ThO 2 ) for comparison. As can be seen from the figure, the electrode containing yttrium oxide showed a performance comparable to that of the triated tungsten electrode in terms of ignition performance.
また、直径1.6mm、酸化イツトリウム含有量１
％の電極棒を用いてTIG溶接試験を行なつた結果
は第２図および第３図に示す通りであつた。これ
らの図には比較のため２％トリヤ含有の電極のデ
ータが併記されている。第２図はAC−TIG溶接
においてアークタイムを２秒間、休止時間１秒間
の繰返し試験を行なつた結果をあらわす。電流は
40A、アークの長さは0.5mmであつた。また、第
３図は電流値を60Aとして同様の試験を行なつた
結果をあらわす。これらの図からわかる通り、
TIG溶接棒として使用した場合の電極棒の消耗も
トリヤ含有のものよりすぐれている。 In addition, the diameter is 1.6 mm, and the yttrium oxide content is 1.
The results of a TIG welding test using % electrode rods are shown in FIGS. 2 and 3. These figures also include data for an electrode containing 2% Thorium for comparison. Figure 2 shows the results of repeated AC-TIG welding tests with an arc time of 2 seconds and a pause time of 1 second. The current is
40A, the arc length was 0.5mm. Moreover, FIG. 3 shows the results of a similar test conducted at a current value of 60A. As you can see from these figures,
When used as a TIG welding rod, the wear of the electrode rod is also superior to those containing Toria.
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棒は従来のトリエーテツドタ
ングステンと同程度のアーク点弧性および消耗性
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。
As is clear from the above description, the tungsten electrode rod according to the present invention has arc ignition properties and consumability comparable to those of conventional thoriated tungsten. Moreover, since thorium oxide is not used, there are no safety problems in handling or management.
第１図はアーク点弧性をあらわすヒストグラ
ム、第２図および第３図は電極の消耗性をあらわ
すグラフである。
FIG. 1 is a histogram showing the arc ignitability, and FIGS. 2 and 3 are graphs showing the consumability of the electrode.
Claims (1)
み、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 0.2 to 3.0% yttrium oxide by weight, with the remainder being tungsten.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28823985A JPS62146236A (en) | 1985-12-21 | 1985-12-21 | Tungsten electrode material |
| DE19863643571 DE3643571A1 (en) | 1985-12-21 | 1986-12-19 | Wear-resistant tungsten electrode material for TIG welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28823985A JPS62146236A (en) | 1985-12-21 | 1985-12-21 | Tungsten electrode material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62146236A JPS62146236A (en) | 1987-06-30 |
| JPH032219B2 true JPH032219B2 (en) | 1991-01-14 |
Family
ID=17727633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28823985A Granted JPS62146236A (en) | 1985-12-21 | 1985-12-21 | Tungsten electrode material |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS62146236A (en) |
| DE (1) | DE3643571A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2577887B2 (en) * | 1986-06-03 | 1997-02-05 | 東邦金属株式会社 | Tungsten electrode material |
| EP0606491A1 (en) * | 1992-07-31 | 1994-07-20 | Toho Kinzoku Co., Ltd. | Tungsten electrode material |
| JPH06297190A (en) * | 1993-04-14 | 1994-10-25 | Toho Kinzoku Kk | Tungsten electrode material |
| CN103866171A (en) * | 2012-12-17 | 2014-06-18 | 北矿新材科技有限公司 | Sintering method of rare earth tungsten electrode blank strip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2695945A (en) * | 1952-11-04 | 1954-11-30 | Union Carbide & Carbon Corp | Refractory metal electrode for inert gas-shielded arc welding |
-
1985
- 1985-12-21 JP JP28823985A patent/JPS62146236A/en active Granted
-
1986
- 1986-12-19 DE DE19863643571 patent/DE3643571A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62146236A (en) | 1987-06-30 |
| DE3643571A1 (en) | 1987-09-03 |
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