JPS58176890A - Heating wire for sheathed heater - Google Patents
Heating wire for sheathed heaterInfo
- Publication number
- JPS58176890A JPS58176890A JP6000282A JP6000282A JPS58176890A JP S58176890 A JPS58176890 A JP S58176890A JP 6000282 A JP6000282 A JP 6000282A JP 6000282 A JP6000282 A JP 6000282A JP S58176890 A JPS58176890 A JP S58176890A
- Authority
- JP
- Japan
- Prior art keywords
- heating wire
- layer
- sheathed heater
- sheathed
- heating
- 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
- 238000010438 heat treatment Methods 0.000 title claims description 25
- 229910018487 Ni—Cr Inorganic materials 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、中高温用シーズヒータに用いる電熱線の高温
酸化を抑制し、電熱線の劣化を防止し、長寿命の７−ズ
ヒータを作製することができるシーズヒータ用電熱線に
関するものである。Detailed Description of the Invention The present invention suppresses high-temperature oxidation of heating wires used in medium-high temperature sheathed heaters, prevents deterioration of the heating wires, and produces a long-life 7-Z heater for sheathed heaters. It concerns heating wires.
従来、シーズヒータの電熱線には、Ｎｉ−Ｃｒ系、Ｆｅ
−Ｎｉ−Ｃｒ系、及びＦｅ−Ｃｒ−Ａｎ系合金の電熱線
が用いられており、若干のＳｉ、Ｍｎが含有されている
。空気中の通電では、Ｎｉ−Ｃｒ系及びＦｅ −Ｎｉ−
Ｃｒ系電熱線はＣｒ、２０３やＮ ］ Ｃｒ ２０４が
生成し、Ｆｅ−Ｃｒ−Ａｊ！系電熱電熱線Ａ２２ｏ３が
生成して、耐酸化性皮膜を形成する。しかし、これらの
酸化物皮嘆中の電熱線成分の拡散が速いため、高温用シ
ーズヒータに使用した場合、絶縁抵抗の劣化が短期間に
発生する欠点があった。Conventionally, heating wires for sheathed heaters have been made of Ni-Cr, Fe, etc.
-Ni-Cr and Fe-Cr-An alloy heating wires are used, and they contain some Si and Mn. When energized in air, Ni-Cr system and Fe-Ni-
In the Cr-based heating wire, Cr, 203 and N ] Cr 204 are generated, and Fe-Cr-Aj! System heating heating wire A22o3 is generated to form an oxidation-resistant film. However, since the heating wire components in these oxide layers diffuse quickly, when used in high-temperature sheathed heaters, there was a drawback that the insulation resistance deteriorated in a short period of time.
本発明は、上記従来のシーズヒータ用電熱線の欠点を解
消するもので、表面にＳ１層を形成したことを特徴とす
る。以下に本発明の実施例について第１図を参照して説
明する。The present invention eliminates the drawbacks of the conventional heating wire for sheathed heaters, and is characterized in that an S1 layer is formed on the surface. Embodiments of the present invention will be described below with reference to FIG.
第１図において、１は例えばＮｉ−Ｃｒ系合金よりなる
電熱線であり、２は電熱線表面に形成したＳ１層である
。In FIG. 1, 1 is a heating wire made of, for example, a Ni-Cr alloy, and 2 is an S1 layer formed on the surface of the heating wire.
このように、電熱線の表面にＳｉ層を形成すると、シー
ズヒータに組み込んで通電した場合、表面のＳｉが酸化
されて耐酸化性を有するＳｉＯ２皮膜が形成され、電熱
線の高温酸化による劣化を抑制し、断線寿命を伸ばすこ
とができる。In this way, when a Si layer is formed on the surface of a heating wire, when it is incorporated into a sheathed heater and energized, the Si on the surface is oxidized and an oxidation-resistant SiO2 film is formed, which prevents deterioration of the heating wire due to high-temperature oxidation. can be suppressed and extend the lifespan of wire breakage.
第２図は、Ｎｉ−Ｃｒ系電熱線の表面に厚さ０．０１μ
ｍ、０．１μｍのＳ１層を形成した場合及びＳｉ層がな
い場合におけるシーズヒータの断線寿命を示す。この寿
命は、シーズヒータ表面が９５０”Ｃになるような加速
テストにより求めた。０．０１μｍＯ８ｉ層を形成した
場合及び０．１μｍのＳｉ層を形成した場合、断線寿命
はＳｉ層のない場合に比較してそれぞれ約１．３倍及び
約２倍となる。Ｓｉ層の膜厚が０．０１８ｍより薄いと
、Ｓｉ層を設けない場合と同程度の断線寿命となり、あ
捷り効果がない。Figure 2 shows a Ni-Cr heating wire with a thickness of 0.01μ on the surface.
Figure 3 shows the disconnection life of the sheathed heater when an S1 layer of 0.1 μm is formed and when there is no Si layer. This life was determined by an accelerated test in which the surface of the sheathed heater was heated to 950"C. When a 0.01 μm O8i layer was formed and when a 0.1 μm Si layer was formed, the disconnection life was determined when there was no Si layer. In comparison, the thickness is about 1.3 times and about 2 times, respectively.If the thickness of the Si layer is thinner than 0.018 m, the disconnection life will be the same as when no Si layer is provided, and there will be no fraying effect.
電熱線表面にＳｉ 層を形成する方法としては、蒸着等
が用いられるが、電熱線に連続してＳｉ層を０．０１〜
１μｍ程度形成する場合には、イオンインプランテーシ
ョンによる方法が簡単で、形成速度も速く、最も適して
いる。Vapor deposition is used as a method to form a Si layer on the surface of the heating wire.
When forming a layer of about 1 μm, ion implantation is the most suitable method because it is simple and has a fast formation speed.
上記の例ではＮｉ−Ｃｒ系電熱線を用いたが、Ｆｅ−Ｎ
ｉ −Ｃｒ 系、Ｆｅ−Ｃｒ−ＡＮ系にも適用できる
。In the above example, a Ni-Cr heating wire was used, but Fe-N
It is also applicable to i-Cr series and Fe-Cr-AN series.
以上のように、本発明によれば、寿命の長いシーズヒー
タを得ることができる。As described above, according to the present invention, a sheathed heater with a long life can be obtained.
第１図は、本発明の電熱線の断面図、第２図は表面にＳ
ｉ 層を形成した電熱線、及びＳｉ層のない電熱線を用
いたシーズヒータの断線寿命の比較１・・・・・・電熱
線、２・・・・・・８１層。FIG. 1 is a cross-sectional view of the heating wire of the present invention, and FIG. 2 is a cross-sectional view of the heating wire of the present invention.
Comparison of disconnection life of a sheathed heater using a heating wire with an i-layer and a heating wire without a Si layer 1... Heating wire, 2... 81 layers.
Claims (2)
の範囲第１項記載のシーズヒータ用電熱線。(2) The heating wire for a sheathed heater according to claim 1, wherein the Si layer has a thickness of 0.01 μm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6000282A JPS58176890A (en) | 1982-04-09 | 1982-04-09 | Heating wire for sheathed heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6000282A JPS58176890A (en) | 1982-04-09 | 1982-04-09 | Heating wire for sheathed heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58176890A true JPS58176890A (en) | 1983-10-17 |
Family
ID=13129454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6000282A Pending JPS58176890A (en) | 1982-04-09 | 1982-04-09 | Heating wire for sheathed heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58176890A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5117040A (en) * | 1974-08-02 | 1976-02-10 | Tokyo Shibaura Electric Co | KAABON HATSUNET SUTAI |
| JPS54125553A (en) * | 1978-03-22 | 1979-09-29 | Matsushita Electric Ind Co Ltd | Sheath heater |
-
1982
- 1982-04-09 JP JP6000282A patent/JPS58176890A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5117040A (en) * | 1974-08-02 | 1976-02-10 | Tokyo Shibaura Electric Co | KAABON HATSUNET SUTAI |
| JPS54125553A (en) * | 1978-03-22 | 1979-09-29 | Matsushita Electric Ind Co Ltd | Sheath heater |
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