JP2820445B2 - Metallic support for catalysts with excellent thermal fatigue resistance - Google Patents
Metallic support for catalysts with excellent thermal fatigue resistanceInfo
- Publication number
- JP2820445B2 JP2820445B2 JP1220421A JP22042189A JP2820445B2 JP 2820445 B2 JP2820445 B2 JP 2820445B2 JP 1220421 A JP1220421 A JP 1220421A JP 22042189 A JP22042189 A JP 22042189A JP 2820445 B2 JP2820445 B2 JP 2820445B2
- Authority
- JP
- Japan
- Prior art keywords
- foil
- honeycomb body
- flat
- corrugated
- honeycomb
- 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 - Fee Related
Links
- 239000003054 catalyst Substances 0.000 title claims description 7
- 239000011888 foil Substances 0.000 claims description 55
- 239000002184 metal Substances 0.000 claims description 16
- 239000000969 carrier Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 208000025599 Heat Stress disease Diseases 0.000 claims 1
- 241000264877 Hippospongia communis Species 0.000 description 42
- 238000005219 brazing Methods 0.000 description 7
- 230000008646 thermal stress Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は触媒を担持し、燃焼排ガスと担持した触媒と
を接触させ排ガス中の有害成分を除去するために使用す
る金属担体に関するものである。特に自動車のエンジン
排気系に設置される触媒用金属担体に係るものである。Description: TECHNICAL FIELD The present invention relates to a metal carrier that supports a catalyst and is used for contacting a combustion exhaust gas with the supported catalyst to remove harmful components in the exhaust gas. . Particularly, the present invention relates to a metal carrier for a catalyst installed in an engine exhaust system of an automobile.
（従来の技術） 従来自動車のエンジン排気ガスを浄化するために使用
している触媒担体は、セラミック製ハニカムが殆んどで
ある。このセラミック製の担体は、排気系に搭載すると
き排気パイプとハニカム体の間に緩衝材が必要であり、
これの材質的な問題とか、ハニカムを構成する壁が構造
上それ程薄くできないため気孔率を大きくとることが困
難である等の問題を含んでおり、そのため、これに代る
べきものとして、金属製の担体が最近開発されている。
この金属製担体はすでに一部実用化されており、平坦な
金属箔（以下平箔という）と、山部と谷部よりなる波形
状の金属箔（以下波箔という）を交互に積層するか、層
状に巻き込んで渦巻状にしたハニカム体としている。そ
してこの平−波箔の接触部をろう付で固定している。(Prior Art) Most catalyst carriers conventionally used for purifying engine exhaust gas of automobiles are ceramic honeycombs. This ceramic carrier requires a cushioning material between the exhaust pipe and the honeycomb body when mounted on the exhaust system,
This involves problems such as material problems and the difficulty in increasing the porosity because the walls that make up the honeycomb cannot be made so thin because of their structure. Carriers have recently been developed.
This metal carrier has already been partially put into practical use, and it is necessary to alternately laminate a flat metal foil (hereinafter referred to as flat foil) and a corrugated metal foil consisting of peaks and valleys (hereinafter referred to as corrugated foil). And a spirally wound honeycomb body. The contact portion of the flat-corrugated foil is fixed by brazing.
金属箔には耐食性、耐熱性に優れたフェライト系ステ
ンレス鋼が用いられ、これ自体は自動車エンジンの排気
ガス環境下に晒されても長時間耐えうる特性をもってい
るが、ハニカム体を構成するにあたって平箔と波箔の接
合固定の形態によってはトラブルが生じることがあり、
平箔−波箔の固定は金属担体の提供に重要な課題の一つ
と云える。即ち、自動車に搭載されエンジンの高温排ガ
スに晒されて加熱冷却が繰り返される過酷な環境下では
大きな熱応力を受ける。この繰り返し熱応力によってハ
ニカム構造体内部にずれが発生したり、破損につながる
こともあるからである。ハニカム体を構成する平箔と波
箔の接合方法の一つが特公昭63−44466号公報に提案さ
れており、ハニカム構造体の少くとも一端面近傍に結合
剤とろう材を供給しハニカム体の中央部分を除いた端面
部分をろう付けすることが記述されている。しかし、こ
の方法では平板、波板の表裏とも全てろうで結合されて
おり、ろう付け部では剛体を形成することになるが、剛
体構造では繰り返し熱応力に耐えることは困難となり長
時間の使用により破損するおそれがある。Ferritic stainless steel with excellent corrosion resistance and heat resistance is used for the metal foil, and it itself has the property of being able to withstand a long time even if it is exposed to the exhaust gas environment of an automobile engine. Trouble may occur depending on the form of bonding and fixing of foil and corrugated foil,
It can be said that fixing the flat foil-corrugated foil is one of the important issues in providing the metal carrier. That is, in a severe environment in which a vehicle is mounted on an automobile, is exposed to high-temperature exhaust gas from an engine, and is repeatedly heated and cooled, it receives a large thermal stress. This is because the repeated thermal stress may cause a shift inside the honeycomb structure or may lead to breakage. One of the joining methods of the flat foil and the corrugated foil constituting the honeycomb body is proposed in Japanese Patent Publication No. 63-44466, in which a binder and a brazing material are supplied at least near one end face of the honeycomb structure to form a honeycomb body. It is described that the end portion except for the central portion is brazed. However, in this method, the flat plate and the corrugated plate are all joined by brazing, and the brazing part forms a rigid body, but with a rigid structure, it is difficult to withstand thermal stress repeatedly, and using it for a long time It may be damaged.
このような熱応力による破損を防止するために、ハニ
カム体の円周方向で波板（箔）の山部と谷部を交互に一
定間隔を置いて平板（箔）と接合するハニカム体の構造
が、西独特許公開公報DE3312944号に開示されている。
これは、前記特公昭63−44466号公報記載のハニカム体
よりは、かなり柔軟な構造となっているが、該西独公報
のFig 3,Fig 4を参照すれば明らかのように、波板と平
板の接合部が波板の山部にして複数おきであり、従って
この間の平−波の接合部は全く存在しない。しかも、長
さ方向には両端部のみとされているため、このような構
造では、ハニカム体自体の充分な耐久強度が得られな
い。例えば、ハニカムのスコーピング現象によりハニカ
ムのフクレ現象が生じたり、接合部の一点が剥離すれば
上記現象が加速されたものとなり、自動車走行中の振動
に耐えられずにくずれるおそれがある。In order to prevent damage due to such thermal stress, a structure of a honeycomb body in which peaks and valleys of a corrugated sheet (foil) are alternately and regularly spaced from each other in a circumferential direction of the honeycomb body and joined to a flat plate (foil). Is disclosed in German Patent Publication DE 3312944.
This has a considerably more flexible structure than the honeycomb body described in JP-B-63-44466, but as apparent from FIGS. Of the corrugated sheet, so that there is no plane-wave junction between them. Moreover, since only the both ends are provided in the length direction, such a structure does not provide sufficient durability of the honeycomb body itself. For example, if the scoping phenomenon of the honeycomb causes the blistering phenomenon of the honeycomb, or if one point of the joint is peeled off, the above phenomenon is accelerated, and there is a possibility that the honeycomb structure may not be able to withstand the vibration during running of the vehicle and break.
（発明が解決しようとする課題） 上述したように従来提案されているハニカム体の接合
部は、剛体接合であるが、これを改善する柔構造である
としても、ハニカム体の接合強度が十分とはいえないと
いう問題点を有している。(Problems to be Solved by the Invention) As described above, the joining portion of the honeycomb body which has been conventionally proposed is a rigid body joining. However, even if the joining structure of the honeycomb body has a flexible structure to improve this, the joining strength of the honeycomb body is not sufficient. There is a problem that it cannot be said.
本発明は、このような従来技術の問題点を改良し、接
合強度も強く、耐熱疲労性に優れている金属担体を提供
することを目的とする。An object of the present invention is to improve such problems of the prior art, to provide a metal carrier having a high bonding strength and excellent thermal fatigue resistance.
（課題を解決するための手段） この発明は山部と谷部からなる波箔と、平坦な平箔と
を重ねて渦巻状に巻回して形成したハニカム体を、外筒
に収納してなる担体において、前記ハニカム体は、その
両端部に接合部を設け、その一端部の接合部は、波箔の
山部か谷部の何れか一方と平箔とが周方向に連続的に接
合し、他端部の接合部は、前記一端部の接合部と異った
サイドの波箔の山部又は谷部を選択して平箔と周方向に
連続的に接合することを特徴とするものである。(Means for Solving the Problems) According to the present invention, a honeycomb body formed by superimposing a corrugated foil composed of peaks and valleys and a flat flat foil and spirally forming the honeycomb body is housed in an outer cylinder. In the carrier, the honeycomb body is provided with joints at both ends thereof, and at one end of the honeycomb body, one of the peaks or valleys of the corrugated foil and the flat foil are continuously joined in the circumferential direction. , The joint at the other end is characterized by selecting a peak or a valley of the corrugated foil on a side different from the joint at the one end and continuously joining the flat foil in the circumferential direction. It is.
以下本発明を図に示す実施例に基づいて説明する。本
発明の金属基体の構造はそれ自体は従来のものと同じ構
造である。第１図に円周方向の一部の断面を示すように
平箔２と波箔３からなり、波箔３の山部４と谷部５は平
箔２と接触している。Hereinafter, the present invention will be described based on an embodiment shown in the drawings. The structure of the metal substrate of the present invention itself is the same as the conventional structure. As shown in FIG. 1 which shows a partial cross section in the circumferential direction, the flat foil 2 and the corrugated foil 3 are provided, and the peaks 4 and the valleys 5 of the corrugated foil 3 are in contact with the flat foil 2.
本発明は、この接触部の接合（通常はろう材を用い
る）に特徴がある。第２図は、第３図に示した本発明金
属基体（ハニカム体）の軸方向断面の一部を示す模式図
であって、ハニカム体１は第１図と同様平箔２と波箔３
とを積層し渦巻き状に形成している。波箔３の山部４及
び谷部５は、それぞれ平箔２に接触しており、この接触
部にろう材を供給して接合するのであるが、本発明にお
いては、第４図に示すように（本図では、説明の都合上
平箔−波箔間には間隙を設置して図示した。）ハニカム
体１の端面側であるＡ帯域は平箔２と波箔３の山部４と
を接合６し、反対の端面側であるＢ帯域では、平箔２と
波箔３の谷部５とを接合７する。The present invention is characterized by the joining of the contact portions (usually using a brazing material). FIG. 2 is a schematic view showing a part of the axial section of the metal substrate (honeycomb body) of the present invention shown in FIG. 3, and the honeycomb body 1 has a flat foil 2 and a corrugated foil 3 as in FIG.
Are laminated to form a spiral. The peaks 4 and the valleys 5 of the corrugated foil 3 are in contact with the flat foils 2 respectively, and the brazing material is supplied to and joined to the contact portions. In the present invention, as shown in FIG. (In this drawing, a gap is provided between the flat foil and the corrugated foil for the sake of explanation.) The A zone, which is the end face side of the honeycomb body 1, has the flat foil 2 and the crests 4 of the corrugated foil 3. And the flat foil 2 and the valley 5 of the corrugated foil 3 are joined 7 in the band B on the opposite end face side.
また、各帯域A,Bにおける接合部の長さl1,l2は、ハニ
カム体１に要求される接合強度によって可変であるが、
各帯域でのオーバーラップは避けるようにしなければな
らない。すなわち、第２図のＣは非接触部８から構成さ
れ、接合部6,7が存在していない帯域であり、その長さl
3は０とならないようにする。The lengths l 1 and l 2 of the joints in the respective zones A and B are variable depending on the joint strength required for the honeycomb body 1.
Overlaps in each band must be avoided. That is, C in FIG. 2 is a band composed of the non-contact portion 8 where the joints 6 and 7 do not exist, and has a length l.
3 should not be 0.
本発明は上述したような構成からなり、接合帯域の半
径方向の断面において、平箔−波箔の全面接合部分がな
いため、極めて有効な熱応力緩和構造となっている。The present invention has the above-described configuration, and has a very effective thermal stress relaxation structure because there is no flat foil-corrugated foil joint in the radial cross section of the joining zone.
本発明のハニカム体は、金属製外筒に収納固定し、こ
れを自動車エンジンの排気系に装備するが、自動車の運
行時、この金属担体は次のような状況下におかれる。す
なわち一般的金属物体に於て、エンジンの始動時はハニ
カムの半径方向の中心部の温度が先行して上昇し、エン
ジンブレーキをかけた時は中心部の温度が先行して下降
する。これにより、外筒とハニカム間に大きな温度差が
発生する。しかも温度差の正負が入れかわるため、ハニ
カムは外筒に近い部分で熱疲労破壊を生じ、ハニカムが
外筒に対してずれるという不都合が生ずる。The honeycomb body of the present invention is housed and fixed in a metal outer cylinder and mounted on an exhaust system of an automobile engine. During operation of the automobile, the metal carrier is placed under the following conditions. That is, in a general metal object, when the engine is started, the temperature at the center of the honeycomb in the radial direction rises first, and when the engine brake is applied, the temperature at the center falls first. As a result, a large temperature difference occurs between the outer cylinder and the honeycomb. In addition, since the temperature difference is switched, the honeycomb undergoes thermal fatigue destruction at a portion near the outer cylinder, and the honeycomb shifts with respect to the outer cylinder.
しかしながら、ハニカムの外側と内側間に温度差が発
生しても、本発明の波板の山側と谷側のどちらか一方し
か接合してなく、かつ軸方向でＡ部とＢ部は同じ側でな
い接合構造としているため、半径方向の熱応力が緩和さ
れる。However, even if a temperature difference occurs between the outside and the inside of the honeycomb, only one of the peak side and the valley side of the corrugated sheet of the present invention is joined, and the A portion and the B portion are not on the same side in the axial direction. Due to the joint structure, thermal stress in the radial direction is reduced.
またＡ部では、波箔の山側が平箔と周方向に連続して
接合されており、Ｂ部では波箔の谷側が平箔と周方向に
連続して接合されているため、軸方向のスコーピング現
象を防止することができる。In part A, the peak side of the corrugated foil is continuously joined to the flat foil in the circumferential direction. In part B, the valley side of the corrugated foil is joined to the flat foil in the circumferential direction. The scoping phenomenon can be prevented.
一般的に金属担体は、その取付性の面から、軸方向対
象構造が多く採用されている。本発明においても対象構
造にすることは可能であるが、その場合には接合帯域を
３箇所,5箇所といった奇数箇所設けることになる。しか
し、担体長さの短い担体においては、接合帯域を３箇所
以上設けると、本発明の如く上下２箇所の接合帯域の場
合に比べて接合帯域間の距離が短くなり、ハニカム体の
柔軟性が著しく阻害される。Generally, a metal carrier often adopts a structure symmetrical in the axial direction from the viewpoint of its mountability. In the present invention, the target structure can be used, but in such a case, an odd number of junction zones, such as three and five, is provided. However, in the case of a carrier having a short carrier length, if three or more bonding zones are provided, the distance between the bonding zones becomes shorter than in the case of two upper and lower bonding zones as in the present invention, and the flexibility of the honeycomb body is reduced. Significantly inhibited.
本発明の金属担体は非対象構造であるが、上下の取付
を逆にしてもハニカム体の柔軟性は損なわれず担体性能
上は何ら問題なく使用できることを確認した。Although the metal carrier of the present invention has an asymmetric structure, it has been confirmed that the flexibility of the honeycomb body is not impaired even if the upper and lower mountings are reversed, and the carrier performance can be used without any problem.
（実 施 例） 第３図に示す構造のハニカム体を製造した。すなわち
外径80mm、軸方向長さ90mmのハニカム体を厚さ50μのス
テンレス波箔２と平箔３を積層し、28巻の渦巻状に巻回
して製造した。それぞれの端面部側Ａ帯域は端面から15
mmの深さにおいて波箔の山部４を接合６しＢ帯域は端面
から15mmの深さにおいて波箔の谷部５と平箔を接合７し
た。各接合部6,7はろう接合とした。(Example) A honeycomb body having a structure shown in Fig. 3 was manufactured. That is, a honeycomb body having an outer diameter of 80 mm and an axial length of 90 mm was manufactured by laminating a stainless steel corrugated foil 2 and a flat foil 3 each having a thickness of 50 μm and winding them into a spiral shape of 28 turns. Each end face side A zone is 15
The peak 4 of the corrugated foil was joined 6 at a depth of mm, and the valley 5 of the corrugated foil was joined 7 to the flat foil 7 at a depth of 15 mm from the end face in the B zone. Each joint 6, 7 was a brazed joint.
ハニカム体はステンレス製外筒９に収納し、ろう剤で
固定している。The honeycomb body is housed in a stainless steel outer cylinder 9 and fixed with a brazing agent.
テスト条件：ガスバーナーで850℃に加熱し、エアーで
常温に冷却する熱冷サイクルを500回実施した。Test conditions: 500 heating / cooling cycles of heating to 850 ° C. with a gas burner and cooling to room temperature with air were performed.
テスト結果：ハニカム破断、接合部剥離なし、またハニ
カム歪みなし 本担体は、半径方向、長さ方向ともに十分な耐力を有
している。Test result: No honeycomb breakage, no joint peeling, and no honeycomb distortion The carrier has sufficient strength in both the radial and length directions.
（発明の効果） 以上説明したように本発明は、ハニカム体を構成する
波箔、平箔の接合を特殊にしたため、熱応力緩和構造と
なっており、加熱−冷却の繰り返される過酷な環境にお
いても長時間十分に耐えることができ、自動車排ガス浄
化触媒の担体として実用価値が極めて大きい。(Effects of the Invention) As described above, the present invention specializes in the joining of the corrugated foil and the flat foil constituting the honeycomb body, and thus has a thermal stress relaxation structure, and can be used in a severe environment where heating and cooling are repeated. Can withstand for a long time, and has a very large practical value as a carrier of an automobile exhaust gas purifying catalyst.
第１図はハニカム体の半径方向断面の一部拡大説明図、 第２図第３図は本発明の軸方向断面を示す拡大模式図、 第４図は本発明の各帯域（A,B,C）に対応する半径方向
断面の一部拡大模式図である。 １……ハニカム体、２……平箔 ３……波箔、４……波箔の山部 ５……波箔の谷部、6,7……接合部 ８……波接合部Fig. 1 is a partially enlarged explanatory view of a radial section of a honeycomb body, Fig. 2 is an enlarged schematic view showing an axial section of the present invention, and Fig. 4 is each zone (A, B, It is a partially expanded schematic diagram of the radial cross section corresponding to C). DESCRIPTION OF SYMBOLS 1 ... Honeycomb body, 2 ... Flat foil 3 ... Corrugated foil 4, ... Crest of corrugated foil 5 ... Valley of corrugated foil, 6, 7 ... Joint 8: Corrugated joint
───────────────────────────────────────────────────── フロントページの続き (72)発明者 太田 仁史 愛知県東海市東海町５―３ 新日本製鐵 株式会社名古屋製鐵所内 (72)発明者 柴田 新次 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 青柳 光 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 高田 登志広 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 西沢 良雄 東京都千代田区丸の内３―３―１ 日本 金属株式会社内 (58)調査した分野(Int.Cl.6，ＤＢ名) B01J 21/00 - 38/74──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hitoshi Ota 5-3 Tokai-cho, Tokai-shi, Aichi Prefecture Nippon Steel Corporation Nagoya Works (72) Inventor Shinji Shibata 1 Toyota-cho, Toyota-shi, Aichi Prefecture Toyota (72) Inventor Hikaru Aoyagi 1st Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Toshihiro Takada 1st Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) ) Inventor Yoshio Nishizawa 3-3-1 Marunouchi, Chiyoda-ku, Tokyo Japan Metal Co., Ltd. (58) Field surveyed (Int. Cl. 6 , DB name) B01J 21/00-38/74
Claims (1)
を重ねて渦巻状に巻回して形成したハニカム体を、外筒
に収納してなる担体において、前記ハニカム体は、その
両端部に接合部を設け、その一端部の接合部は、波箔の
山部か谷部の何れか一方と平箔とが周方向に連続的に接
合し、他端部の接合部は、前記一端部の接合部と異った
サイドの波箔の山部又は谷部を選択して、平箔と周方向
に連続的に接合することを特徴とする耐熱疲労性の優れ
た触媒用金属担体。1. A carrier in which a honeycomb body formed by stacking a corrugated foil consisting of peaks and valleys and a flat flat foil and spirally winding the honeycomb body is housed in an outer cylinder, wherein the honeycomb body is A joint portion is provided at both ends, and a joint portion at one end portion is formed by continuously joining one of a peak portion or a valley portion of the corrugated foil and the flat foil in the circumferential direction, and a joint portion at the other end portion. A catalyst excellent in heat fatigue resistance, characterized in that a peak or a valley of a corrugated foil on a side different from the joining portion at the one end is selected and continuously joined to the flat foil in a circumferential direction. For metal carriers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1220421A JP2820445B2 (en) | 1989-08-29 | 1989-08-29 | Metallic support for catalysts with excellent thermal fatigue resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1220421A JP2820445B2 (en) | 1989-08-29 | 1989-08-29 | Metallic support for catalysts with excellent thermal fatigue resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0386244A JPH0386244A (en) | 1991-04-11 |
| JP2820445B2 true JP2820445B2 (en) | 1998-11-05 |
Family
ID=16750845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1220421A Expired - Fee Related JP2820445B2 (en) | 1989-08-29 | 1989-08-29 | Metallic support for catalysts with excellent thermal fatigue resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2820445B2 (en) |
-
1989
- 1989-08-29 JP JP1220421A patent/JP2820445B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0386244A (en) | 1991-04-11 |
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