JP2000094123A - Carbon electrode material - Google Patents
Carbon electrode materialInfo
- Publication number
- JP2000094123A JP2000094123A JP10269695A JP26969598A JP2000094123A JP 2000094123 A JP2000094123 A JP 2000094123A JP 10269695 A JP10269695 A JP 10269695A JP 26969598 A JP26969598 A JP 26969598A JP 2000094123 A JP2000094123 A JP 2000094123A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- electrode material
- impregnated
- aluminum
- carbon
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高温雰囲気で使用
するのに好適なカーボン電極材に関し、特に、モータの
口出し線のロウ付等のスポツト溶接用電極材として好適
なカーボン電極材に関する。The present invention relates to a carbon electrode material suitable for use in a high-temperature atmosphere, and more particularly to a carbon electrode material suitable as an electrode material for spot welding such as brazing of a lead wire of a motor.
【０００２】[0002]
【従来の技術】スポット溶接する際に、コテ先に使用さ
れるカーボン電極材は、一般に、１２００〜１５００℃
程度の酸化雰囲気で使用される。通常のカーボン材料を
用いた、従来のカーボン電極材では、耐熱性が低いため
に消耗が多く、寿命が短いため交換頻度が多い等の問題
がある。このようなカーボン電極材の耐酸化性を改善す
る方法として、カーボンの高密度化があるが、消耗の低
減にある程度の効果はあるものの十分な効果があるとは
いえなかった。2. Description of the Related Art In spot welding, a carbon electrode material used for an iron tip generally has a temperature of 1200 to 1500 ° C.
Used in a moderately oxidizing atmosphere. A conventional carbon electrode material using a normal carbon material has problems such as low heat resistance, high consumption, and short life, and frequent replacement. As a method of improving the oxidation resistance of such a carbon electrode material, there is a method of increasing the density of carbon. However, although it has a certain effect on reduction of consumption, it cannot be said that it has a sufficient effect.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、高温
環境での耐熱性及び耐酸化性に優れ、高寿命のカーボン
電極材を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a carbon electrode material having excellent heat resistance and oxidation resistance in a high temperature environment and having a long life.
【０００４】[0004]
【課題を解決するための手段】本発明は、カーボン基材
の表面にアルミニウム化合物を含浸させてなるカーボン
電極材に関する。SUMMARY OF THE INVENTION The present invention relates to a carbon electrode material obtained by impregnating the surface of a carbon substrate with an aluminum compound.
【０００５】[0005]
【発明の実施の形態】本発明のカーボン電極材の基材と
して使用されるカーボン材の種類に特に制限はなく、一
般の電気黒鉛質カーボン基材等を使用することができ
る。例えば、コークス粉、黒鉛粉、カーボンブラックな
どの骨材にコールタール、タールピッチなどの結合材を
加え、加熱混練・粉砕・成形・焼成・さらに必要に応じ
て黒鉛化したカーボン基材を用いることができる。骨材
と結合材の使用割合に特に制限はないが、結合材は骨材
１００重量部に対して、６０〜１２０重量部使用するこ
とが好ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS There is no particular limitation on the type of carbon material used as the substrate of the carbon electrode material of the present invention, and a general electrographitic carbon substrate or the like can be used. For example, a binder such as coal tar or tar pitch is added to aggregates such as coke powder, graphite powder, and carbon black, and a heat-kneading, pulverization, molding, firing, and, if necessary, a graphitized carbon substrate is used. Can be. There is no particular limitation on the usage ratio of the aggregate and the binder, but the binder is preferably used in an amount of 60 to 120 parts by weight based on 100 parts by weight of the aggregate.
【０００６】本発明に用いられるカーボン基材を製造す
るにあたり、加熱混練は一般に双腕型ニーダーなどを用
いて、骨材、結合材等の各材料を好ましくは１８０〜３
００℃で加熱混練することにより行うことができる。粉
砕は加熱混練で得られたものを各種粉砕機を用いて、好
ましくは平均粒径１０〜３０μｍになるように粉砕する
ことが好ましい。In the production of the carbon substrate used in the present invention, the heat kneading is generally carried out by using a double-armed kneader or the like to remove each material such as aggregate and binder from 180 to 3 times.
It can be performed by heating and kneading at 00 ° C. In the pulverization, it is preferable to pulverize the material obtained by heat kneading using various types of pulverizers, preferably so as to have an average particle size of 10 to 30 μm.
【０００７】成形は、粉砕により得られた粉体を、金型
などに詰め、油圧プレスなどにより、好ましくは８００
〜１２００kg/cm2の圧力でブロック形状にすることによ
り行うことができる。焼成は、還元雰囲気下で、好まし
くは８００〜１２００℃に昇温することにより行うこと
ができる。ここで、昇温時間は、３００〜５００時間が
好ましい。還元雰囲気下で昇温する方法としては、成形
体のまわりに炭素粉を詰める方法などを用いることがで
きる。さらに高温下、好ましくは２０００〜３０００℃
で処理して黒鉛化を進めることによりカーボン基材を製
造することができる。なお、本発明のカーボン基材とし
て、市販されているものを用いることもできる。For molding, the powder obtained by the pulverization is packed in a mold or the like, and is preferably 800
It can be carried out by forming a block at a pressure of up to 1200 kg / cm 2 . The firing can be performed in a reducing atmosphere, preferably by raising the temperature to 800 to 1200 ° C. Here, the heating time is preferably 300 to 500 hours. As a method of raising the temperature in a reducing atmosphere, a method of packing carbon powder around a molded body can be used. Further under high temperature, preferably 2000-3000 ° C
The carbon base material can be manufactured by performing the treatment with and promoting the graphitization. In addition, a commercially available carbon substrate can also be used as the carbon substrate of the present invention.
【０００８】本発明においては、カーボン電極材の表面
にアルミニウム化合物を含浸させるが、これは、耐熱温
度が高く、通常のカーボン単体では、４００℃付近から
大気中の酸素よリ酸化し始めるが、このアルミニウム化
合物の耐熱性により酸化の進行を抑制することができる
ためである。含浸させるアルミニウム化合物としては、
最終的に製造されるカーボン電極材において十分な耐熱
性を与えるものであれば好ましく、例えば、リン酸アル
ミニウムが挙げられ、これを溶媒または分散媒に分散さ
せた溶液または分散液を含浸に使用することができる。In the present invention, the surface of the carbon electrode material is impregnated with an aluminum compound, which has a high heat-resistant temperature, and ordinary carbon alone starts to reoxidize from oxygen in the atmosphere at around 400 ° C. This is because the progress of oxidation can be suppressed by the heat resistance of the aluminum compound. As the aluminum compound to be impregnated,
It is preferable that the carbon electrode material finally produced has sufficient heat resistance, for example, aluminum phosphate is used, and a solution or dispersion obtained by dispersing this in a solvent or a dispersion medium is used for impregnation. be able to.
【０００９】アルミニウム化合物を含浸させたカーボン
基材は、ついで、好ましくは７００〜８００℃に好まし
くは１〜３時間保持して焼成することができ、これによ
り、アルミナ（酸化アルミニウム）がカーボン基材表面
に含浸した状態の耐熱性に優れるカーボン電極材とな
る。アルミニウム化合物の含浸量に特に制限はないが、
焼成後の最終的なカーボン電極材における含浸量が、含
浸前のカーボン基材に対して２重量％以上であることが
好ましい。含浸量が多ければ多いほど強固になるので上
限は特に制限はないが、通常１０重量％以下の含浸量と
なる。[0009] The carbon substrate impregnated with the aluminum compound can then be calcined, preferably at 700 to 800 ° C, preferably for 1 to 3 hours, whereby alumina (aluminum oxide) is converted to carbon substrate. A carbon electrode material having excellent heat resistance when impregnated on the surface. The impregnation amount of the aluminum compound is not particularly limited,
It is preferable that the final impregnation amount in the carbon electrode material after firing is 2% by weight or more based on the carbon substrate before impregnation. The upper limit is not particularly limited because the greater the amount of impregnation, the stronger the impregnation. Usually, however, the amount of impregnation is 10% by weight or less.
【００１０】アルミニウム化合物の含浸方法に特に制限
は無く、圧力容器中にカーボン基材とアルミニウム化合
物の溶液または分散液を入れて加圧し含浸する方法や、
カーボン基材に刷毛等を用いてアルミニウム化合物の溶
液又は分散液を塗布し含浸させる方法があるが、加圧し
含浸する方法が好ましい。There is no particular limitation on the method of impregnating the aluminum compound, and a method in which a solution or dispersion of a carbon base material and an aluminum compound is placed in a pressure vessel and impregnated by pressing,
There is a method in which a solution or a dispersion of an aluminum compound is applied to a carbon base material using a brush or the like and impregnated.
【００１１】本発明のカーボン電極材は、アルミニウム
化合物を含浸させる前に、予め機械加工等により必要と
されるカーボン電極材の形状に加工しておくことが好ま
しい。カーボン電極材の形状及び大きさは様々で特に制
限はない。形状としては、例えば、図１に示すような、
ねじ穴が設けられた四角柱状のものが挙げられる。大き
さとしては、例えば、一片が１０〜１１０mmの四角柱が
挙げられる。前記形状に加工した基材におけるアルミニ
ウム化合物の含浸は、その基材の全面に行うことが好ま
しい。以上のようにして製造された本発明のカーボン電
極材は、耐熱性に優れるものとして、スポット溶接用の
電極等に使用される。It is preferable that the carbon electrode material of the present invention is previously worked into a required shape of the carbon electrode material by machining or the like before impregnation with an aluminum compound. The shape and size of the carbon electrode material are various and not particularly limited. As the shape, for example, as shown in FIG.
For example, a rectangular column having a screw hole may be used. As the size, for example, a square pillar having a piece of 10 to 110 mm can be used. It is preferable that the impregnation of the substrate processed into the shape with the aluminum compound is performed on the entire surface of the substrate. The carbon electrode material of the present invention produced as described above has excellent heat resistance and is used for an electrode for spot welding and the like.
【００１２】[0012]
【実施例】実施例及び比較例 日立化成工業(株)製の黒鉛材料であるＨＣＢ−５を機械
加工して、図１に示す形状で大きさが縦３０mm、横３０
mm、厚さ１０mmの四角柱状のカーボン基材を作成した。
ついでこれを、バルブのついた圧力容器に入れ、容器内
を減圧状態にした後、バルブをあけて、リン酸アルミニ
ウムの分散液を圧力容器内へ注入し、リン酸アルミニウ
ムを全表面に含浸させた。含浸させた後、７５０℃に２
時間保持して焼成して、アルミナが全表面に含浸された
カーボン電極材を得た。含浸前のカーボン基材に対する
アルミナの含浸量を測定したところ３重量％であった。
一方、比較例として、前記アルミナを含浸させない以外
は同様の基材を用いて同様の形状に加工したカーボン電
極材を製造した。Examples and Comparative Examples HCB-5, a graphite material manufactured by Hitachi Chemical Co., Ltd., was machined into a shape shown in FIG.
A rectangular pillar-shaped carbon substrate having a thickness of 10 mm and a thickness of 10 mm was prepared.
Then, this was put into a pressure vessel equipped with a valve, and the inside of the vessel was depressurized.After opening the valve, a dispersion of aluminum phosphate was injected into the pressure vessel, and the entire surface was impregnated with aluminum phosphate. Was. After impregnating, 750 ° C 2
The carbon electrode material in which alumina was impregnated on the entire surface was obtained by firing while holding for a time. The impregnated amount of alumina with respect to the carbon substrate before impregnation was measured and was 3% by weight.
On the other hand, as a comparative example, a carbon electrode material processed into the same shape using the same base material except that the alumina was not impregnated was manufactured.
【００１３】前記により得られたカーボン電極材を、コ
テに装着し、スポット溶接を行った。表１に、実施例の
カーボン電極材と比較例のカーボン電極材の、スポット
溶接ができた回数を示す。The carbon electrode material obtained as described above was mounted on a trowel and spot welding was performed. Table 1 shows the number of times spot welding was performed between the carbon electrode material of the example and the carbon electrode material of the comparative example.
【００１４】[0014]
【表１】 [Table 1]
【００１５】表１から明らかなように、実施例のカーボ
ン電極材の方が、比較例として示す従来のカーボン電極
材よリも３倍以上の回数使用できたことがわかる。よっ
て、本発明のカーボン電極材は、高温環境において、耐
酸化性に優れた電極材であることがわかる。As is clear from Table 1, it can be seen that the carbon electrode material of the example could be used three times or more more times than the conventional carbon electrode material shown as a comparative example. Therefore, it is understood that the carbon electrode material of the present invention is an electrode material having excellent oxidation resistance in a high temperature environment.
【００１６】[0016]
【発明の効果】本発明のカーボン電極材は、耐熱性に優
れ、高温環境における耐酸化性の劣化が軽減して消耗が
軽減するため、従来のカーボン電極材よリも寿命の長い
ものである。The carbon electrode material of the present invention is excellent in heat resistance and has a longer life than conventional carbon electrode materials, because the deterioration of oxidation resistance in a high temperature environment is reduced and the consumption is reduced.
【図１】本発明のカーボン電極材の一例を示す図面であ
り、（ａ）は斜視図、（ｂ）は断面図である。FIG. 1 is a drawing showing an example of a carbon electrode material of the present invention, wherein (a) is a perspective view and (b) is a cross-sectional view.
１…カーボン電極材 ２…アルミニウム含浸部分 ３…ねじ穴 1: Carbon electrode material 2: Aluminum impregnated part 3: Screw hole
Claims (1)
物を含浸させてなるカーボン電極材。1. A carbon electrode material obtained by impregnating a surface of a carbon substrate with an aluminum compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10269695A JP2000094123A (en) | 1998-09-24 | 1998-09-24 | Carbon electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10269695A JP2000094123A (en) | 1998-09-24 | 1998-09-24 | Carbon electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000094123A true JP2000094123A (en) | 2000-04-04 |
Family
ID=17475909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10269695A Pending JP2000094123A (en) | 1998-09-24 | 1998-09-24 | Carbon electrode material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000094123A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101521442B1 (en) * | 2014-03-07 | 2015-05-21 | 한국과학기술연구원 | Inorganic particle impregnated carbon felts and method thereof |
| KR101865217B1 (en) * | 2016-04-26 | 2018-06-07 | 한국과학기술연구원 | method for manufacturing inorganic particle coated carbon felts and inorganic particle coated carbon felts thereby |
-
1998
- 1998-09-24 JP JP10269695A patent/JP2000094123A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101521442B1 (en) * | 2014-03-07 | 2015-05-21 | 한국과학기술연구원 | Inorganic particle impregnated carbon felts and method thereof |
| KR101865217B1 (en) * | 2016-04-26 | 2018-06-07 | 한국과학기술연구원 | method for manufacturing inorganic particle coated carbon felts and inorganic particle coated carbon felts thereby |
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