JPH0116909B2 - - Google Patents
Info
- Publication number
- JPH0116909B2 JPH0116909B2 JP15708981A JP15708981A JPH0116909B2 JP H0116909 B2 JPH0116909 B2 JP H0116909B2 JP 15708981 A JP15708981 A JP 15708981A JP 15708981 A JP15708981 A JP 15708981A JP H0116909 B2 JPH0116909 B2 JP H0116909B2
- Authority
- JP
- Japan
- Prior art keywords
- tungsten wire
- electrode
- wire
- tungsten
- heat treatment
- 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 30
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/62—Continuous furnaces for strip or wire with direct resistance heating
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Resistance Heating (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
本発明は走行するタングステン線に電流を通じ
て焼なましを行なう通電熱処理用電極に関するも
のである。
この種の通電熱処理用電極には、従来から水銀
が用いられてきたが、その有害性が問題視される
に至つて、これに代わり高融点金属であるタング
ステン線をスポンジ状に固めたものが用いられて
いる。
ところが、既存のスポンジ状に固めたタングス
テン線からなる通電処理用電極は、早期に消耗し
やすく、またしばしば熱処理すべきタングステン
線との間にスパークを起して、タングステン線に
過剰加熱の部分を生じさせ、このためタングステ
ン線をもろくして、断線を生じさせ、タングステ
ン線の品質を劣化させるという問題があつた。
本発明はこのような問題にかんがみてなされた
ものであり、早期の消耗をなくし、またスパーク
を防止して、タングステン線に均一な熱処理を行
なうことにより、品質のすぐれたタングステン線
を得ることのできる通電熱処理用電極を提供する
ものである。
以下、本発明の実施例について図面を用いて説
明する。
図において、焼なましされるタングステン線１
は、巻取り装置（図示せず）により連続して送ら
れ、炉２内に設けられた一対の電極３，４間を通
過するようになつている。電極３は固定されてい
るが、電極４はスプリング５によつて付勢されて
おり、これによつて電極３にタングステン線１が
良好に接触すべく可動できるようになつている。
電極３，４のタングステン線１との接触部分は、
タングステン線をスポンジ状に固めたものからな
つている。しかして、電極３，３間に電圧が加え
られると、タングステン線１が自己発熱すること
により、タングステン線１に焼なましが行なわれ
る。
電極３，４のスポンジ状のタングステン線１と
して、線径が25μｍ以下のものを用いたとき、良
好な結果が得られた。すなわち、この線径を10，
20，25，29，50μｍと変えたスポンジ状のタング
ステン線を用いて、このタングステン線を用い
て、このタングステン線の消耗の度合、およびス
パーク発生率を調べたところ、下表に示すとおり
の結果となつた。
The present invention relates to an electrode for electrical heat treatment in which a running tungsten wire is annealed by passing an electric current through it. Mercury has traditionally been used in electrodes for this type of current-carrying heat treatment, but as its toxicity has become a problem, tungsten wire, a high-melting point metal, has been hardened into a sponge-like material instead. It is used. However, existing current-carrying electrodes made of tungsten wire hardened into a sponge-like shape tend to wear out quickly, and often sparks occur between the tungsten wire and the tungsten wire to be heat-treated, causing excessive heating of the tungsten wire. This has caused problems in that the tungsten wire becomes brittle, causing wire breakage and deteriorating the quality of the tungsten wire. The present invention was made in view of these problems, and it is possible to obtain a tungsten wire of excellent quality by eliminating premature wear, preventing sparks, and uniformly heat-treating the tungsten wire. The present invention provides an electrode for electrical heat treatment that can be used. Embodiments of the present invention will be described below with reference to the drawings. In the figure, tungsten wire 1 to be annealed
is continuously fed by a winding device (not shown) and passed between a pair of electrodes 3 and 4 provided in the furnace 2. Although the electrode 3 is fixed, the electrode 4 is biased by a spring 5, so that it can be moved so that the tungsten wire 1 can come into good contact with the electrode 3.
The contact portion of the electrodes 3 and 4 with the tungsten wire 1 is
It is made of tungsten wire hardened into a sponge-like shape. Thus, when a voltage is applied between the electrodes 3, 3, the tungsten wire 1 self-heats, thereby annealing the tungsten wire 1. Good results were obtained when the sponge-like tungsten wires 1 of the electrodes 3 and 4 had a wire diameter of 25 μm or less. In other words, this wire diameter is 10,
Using sponge-like tungsten wires with different diameters of 20, 25, 29, and 50 μm, we investigated the degree of wear and tear of the tungsten wires and the spark generation rate, and the results are shown in the table below. It became.
【表】
上記から、スポンジ状のタングステン線とし
て、25μｍ以下のものを用いたとき、早期の消耗
を防止することができ、またスパークの発生も少
ないきわめて良好な結果が得られることが明らか
である。
なお、図中、６は炉２内に不活性ガスまたは還
元性ガスを送入するためのガス管、７は蓋、８は
フツクである。
以上説明したように、本発明は走行するタング
ステン線に電流を通じて焼なましを行なう通電熱
処理用電極であつて、前記タングステン線と接触
する部分が線径25μｍ以下のタングステン線をス
ポンジ状に固めたものからなるので、早期の消耗
を防止することができるとともに、スパークの発
生を防止して、タングステン線を均一に加熱する
ことができ、したがつてタングステン線のもろさ
をなくして、品質のすぐれたタングステン線を得
ることのできる通電熱処理用電極を提供すること
ができるものである。[Table] From the above, it is clear that when a sponge-like tungsten wire of 25 μm or less is used, it is possible to prevent premature wear and to obtain very good results with less spark generation. . In the figure, 6 is a gas pipe for feeding inert gas or reducing gas into the furnace 2, 7 is a lid, and 8 is a hook. As explained above, the present invention is an electrode for electrical heat treatment in which a running tungsten wire is annealed by passing an electric current through it, and the part in contact with the tungsten wire is made of a tungsten wire having a wire diameter of 25 μm or less and hardened into a sponge shape. As the tungsten wire is made of aluminum, it is possible to prevent early wear and tear, prevent the generation of sparks, and uniformly heat the tungsten wire. It is possible to provide an electrode for electrical heat treatment that can yield a tungsten wire.
図は本発明にかかる通電熱処理用電極を備えた
熱処理装置を示す一部破断側面図である。
１……タングステン線、３，４……電極。
The figure is a partially cutaway side view showing a heat treatment apparatus equipped with an electrode for electrical heat treatment according to the present invention. 1... Tungsten wire, 3, 4... Electrode.
Claims (1)
ましを行なう通電熱処理用電極であつて、前記タ
ングステン線と接触する部分が線径25μｍ以下の
タングステン線をスポンジ状に固めたものからな
ることを特徴とする通電熱処理用電極。1. An electrode for electrical heat treatment in which a running tungsten wire is annealed by passing an electric current through it, characterized in that the part that comes into contact with the tungsten wire is made of a tungsten wire hardened into a sponge shape with a wire diameter of 25 μm or less. Electrode for electrical heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56157089A JPS5858236A (en) | 1981-10-01 | 1981-10-01 | Electrode for electrical heat treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56157089A JPS5858236A (en) | 1981-10-01 | 1981-10-01 | Electrode for electrical heat treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5858236A JPS5858236A (en) | 1983-04-06 |
| JPH0116909B2 true JPH0116909B2 (en) | 1989-03-28 |
Family
ID=15642001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56157089A Granted JPS5858236A (en) | 1981-10-01 | 1981-10-01 | Electrode for electrical heat treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5858236A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61169157A (en) * | 1985-01-24 | 1986-07-30 | Nippon Steel Corp | Electrical heating method of refractory wall for molten metal |
| JPS61221293A (en) * | 1985-03-26 | 1986-10-01 | Mitsubishi Heavy Ind Ltd | Coal gasifying apparatus |
| JP2574114B2 (en) * | 1993-07-01 | 1997-01-22 | 南海プライウッド株式会社 | Specially processed decorative plywood |
-
1981
- 1981-10-01 JP JP56157089A patent/JPS5858236A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5858236A (en) | 1983-04-06 |
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