JPH08210128A - Metal base for catalyst of automobile exhaust gas purification excellent in resistance against thermal fatigue - Google Patents
Metal base for catalyst of automobile exhaust gas purification excellent in resistance against thermal fatigueInfo
- Publication number
- JPH08210128A JPH08210128A JP7304399A JP30439995A JPH08210128A JP H08210128 A JPH08210128 A JP H08210128A JP 7304399 A JP7304399 A JP 7304399A JP 30439995 A JP30439995 A JP 30439995A JP H08210128 A JPH08210128 A JP H08210128A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- intermediate cylinder
- fin
- honeycomb body
- outer cylinder
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract description 59
- 239000003054 catalyst Substances 0.000 title claims description 8
- 238000000746 purification Methods 0.000 title claims description 4
- 239000011888 foil Substances 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 3
- 208000025599 Heat Stress disease Diseases 0.000 claims description 2
- 238000005304 joining Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008646 thermal stress Effects 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Exhaust Gas After Treatment (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車の排ガス浄
化用の触媒コンバータとして用いられる金属基体（金属
担体）の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a metal base (metal carrier) used as a catalytic converter for purifying exhaust gas of automobiles.
【０００２】[0002]
【従来の技術】近年、自動車の排ガス浄化用の触媒を担
持する担体として、セラミックスハニカムに代わり金属
担体が注目されてきている。この金属担体は、厚さ５０
μｍ前後のステンレス鋼製の平らな箔（以下、単に平箔
と称する）と波型加工を施されたステンレス鋼製箔（以
下、単に波箔と称する）を重ねて、円筒形或いは楕円柱
状に巻き込んでハニカム体とし、このハニカム体を金属
外筒内に嵌装して平箔・波箔・外筒間を相互に蝋付けや
抵抗溶接等によって接合して製作されている。2. Description of the Related Art In recent years, attention has been paid to a metal carrier instead of a ceramic honeycomb as a carrier for carrying a catalyst for purifying exhaust gas of automobiles. This metal carrier has a thickness of 50
A stainless steel flat foil of about μm (hereinafter, simply referred to as flat foil) and a corrugated stainless steel foil (hereinafter, simply referred to as corrugated foil) are stacked to form a cylindrical or elliptic column. It is manufactured by winding it up to form a honeycomb body, fitting the honeycomb body in a metal outer cylinder, and joining the flat foil, the corrugated foil, and the outer cylinder to each other by brazing or resistance welding.
【０００３】金属担体は、自動車の高速連続運転に耐え
る十分な強度と、激しい加熱・冷却サイクルに耐える耐
熱疲労性が要求される。特に、金属外筒とその内部に嵌
装される平箔と波箔からなるハニカム体は、急速な加熱
と冷却による温度差（ハニカム体が金属外筒に先行して
加熱される）によって熱歪を生じ、これが両者の接合部
の破損を招来し、ハニカム体の飛び出しや排ガス下流方
向へのズレを生じる等の事態を発生する処から、金属担
体は高度の耐熱疲労特性を有することが要求される。The metal carrier is required to have sufficient strength to withstand high-speed continuous operation of automobiles and thermal fatigue resistance to withstand severe heating / cooling cycles. In particular, the honeycomb body consisting of the metal outer cylinder and the flat foil and corrugated foil fitted inside it has a thermal strain due to the temperature difference between the rapid heating and cooling (the honeycomb body is heated prior to the metal outer cylinder). The metal carrier is required to have a high degree of thermal fatigue resistance because it causes damage to the joint between the two and causes a situation such as popping out of the honeycomb body or deviation in the exhaust gas downstream direction. It
【０００４】而して、上記金属外筒とハニカム体の接合
を強化することを狙いとする技術的手段として、たとえ
ば特開昭６１−１９９５７号公報や特開昭６２−４５３
４５号公報に開示されているように、ハニカム体自体の
部分的な接合によって、金属担体の熱疲労強度の向上を
図る技術がある。また、金属外筒とハニカム体の接合部
における剥離防止を目的として、たとえば実開昭６２−
１９４４３６号公報に開示されている技術がある。この
技術は、ハニカム体の少なくとも一部の横断面部におい
て波箔と平箔とを相互に接合するとともに金属外筒の一
横断面部においてのみハニカム体の外周を金属外筒の内
周面に接合し、熱歪を軸方向において吸収し金属外筒と
ハニカム体の接合部における剥離を防止するようにして
いる。As a technical means aiming at strengthening the bonding between the metal outer cylinder and the honeycomb body, for example, JP-A-61-19957 and JP-A-62-453.
As disclosed in Japanese Patent Laid-Open No. 45-45, there is a technique for improving the thermal fatigue strength of a metal carrier by partially bonding the honeycomb body itself. Further, for the purpose of preventing peeling at the joint between the metal outer cylinder and the honeycomb body, for example, in Japanese Utility Model Publication No. 62-
There is a technique disclosed in Japanese Patent Publication No. 194436. In this technique, the corrugated foil and the flat foil are bonded to each other in at least a part of the cross section of the honeycomb body, and the outer periphery of the honeycomb body is bonded to the inner peripheral surface of the metal outer tube only in one cross section of the metal outer tube. The thermal strain is absorbed in the axial direction to prevent peeling at the joint between the metal outer cylinder and the honeycomb body.
【０００５】また、特開昭６２−３０５３３号公報に
は、ハニカム体と金属外筒の間にカラー状の間隔片を排
ガス上流向きに突出させて挿入しハニカム体と金属外筒
の間の温度差に起因する熱歪を吸収するようにした技術
が、また、実開昭６３−２８８２２号公報には、ハニカ
ム体と金属外筒の間にガス導入用の衝突板を兼ねた多数
のフィン状突出部（排ガス上流向きに突出）を有する中
間筒を嵌装し、ハニカム体と金属外筒の間の温度差に起
因する熱歪を吸収するようにした技術が開示されてい
る。Further, in Japanese Patent Laid-Open No. 62-30533, a collar-shaped spacing piece is inserted between the honeycomb body and the metal outer cylinder so as to project toward the upstream side of the exhaust gas, and the temperature between the honeycomb body and the metal outer cylinder is increased. A technique for absorbing the thermal strain caused by the difference is disclosed in Japanese Utility Model Laid-Open No. 63-28822, in which a large number of fin-shaped members serving as a collision plate for introducing gas are provided between the honeycomb body and the metal outer cylinder. A technique is disclosed in which an intermediate cylinder having a protruding portion (projecting toward the upstream side of exhaust gas) is fitted to absorb thermal strain caused by a temperature difference between the honeycomb body and the metal outer cylinder.
【０００６】しかしながら、これら先行技術において、
ハニカム体自体を部分的に接合するものは、金属担体の
製造が難しく多数の担体について常に一定の接合構造の
ものを安定して得ることが困難である。また、一横断面
で金属外筒とハニカム体を接合するものは、軸方向にお
ける熱応力の低減には効果があるけれども、径方向にお
ける熱応力の緩和ができないから長さに対して径の大き
めの担体においては問題がある。さらに、ハニカム体と
金属外筒の間にカラー状或いは多数のフィン状突出物を
有する中間筒を嵌装する技術は、熱応力を効果的に緩和
する有効な技術であるけれども、担体を一周するカラー
状の間隔片は、その形状からそれ自体の剛性が高く担体
の径方向における熱応力を緩和し難い。However, in these prior arts,
It is difficult to manufacture a metal carrier in which the honeycomb bodies themselves are partially bonded, and it is difficult to stably obtain a plurality of carriers having a constant bonding structure. In addition, the one in which the metal outer cylinder and the honeycomb body are joined in one cross section is effective in reducing the thermal stress in the axial direction, but since the thermal stress in the radial direction cannot be relaxed, the diameter is larger than the length. There is a problem with the carrier. Further, the technique of fitting an intermediate cylinder having a collar-shaped or a large number of fin-shaped protrusions between the honeycomb body and the metal outer cylinder is an effective technology for effectively relieving thermal stress, but it makes a round around the carrier. The collar-shaped spacing piece has a high rigidity by itself due to its shape, and it is difficult to relax the thermal stress in the radial direction of the carrier.
【０００７】また、実開昭６３−２８８２２号公報のよ
うに、多数のフィン状突出物を有する中間筒を嵌装する
ものは、金属外筒との接合がなされないのでハニカム体
を支持するためのリテーナが必要でありまた、担体の軸
方向に突出したフィン状部の先端を金属外筒の内周面に
接合する場合にはフィン状突出部に金属外筒内周面の曲
率に合致した曲率を与えねばならず、その加工が至難で
ある。[0007] Also, as disclosed in Japanese Utility Model Laid-Open No. 63-28822, the one in which the intermediate cylinder having a large number of fin-shaped protrusions is fitted is not joined to the metal outer cylinder, and therefore supports the honeycomb body. When the tip of the fin-shaped portion protruding in the axial direction of the carrier is joined to the inner peripheral surface of the metal outer cylinder, the fin-shaped protrusion matches the curvature of the inner peripheral surface of the metal outer cylinder. It must be given a curvature, which is extremely difficult to process.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、これら従来
の技術において、特にフィン状突出物を有する中間筒を
嵌装する場合の問題を解決し、上述した熱歪を効果的に
吸収し、金属外筒とハニカム体の接合をより一層強固に
し長時間の使用に耐える自動車排ガス浄化触媒用金属担
体（金属基体）を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention solves the problems in these prior arts, particularly when fitting an intermediate cylinder having fin-shaped protrusions, and effectively absorbs the above-mentioned thermal strain, An object of the present invention is to provide a metal carrier (metal substrate) for an automobile exhaust gas purification catalyst, which further strengthens the bonding between the metal outer cylinder and the honeycomb body and can withstand long-term use.
【０００９】[0009]
【課題を解決するための手段】本発明の要旨とする処
は、平らな金属箔と波形加工を施された金属箔とを重ね
て巻き込んで形成したハニカム体と、該ハニカム体が嵌
装される金属外筒と、前記ハニカム体と金属外筒の間
に、その外周面に複数のフィン状突出部を設けたステン
レス鋼製中間筒を嵌装してなる自動車排ガス浄化触媒用
金属基体において、前記中間筒のフィン状突出部が中間
筒の周方向または斜め方向に延びており、かつフィン状
突出部と中間筒との二つの切欠先端部を結ぶ直線が中間
筒の軸方向にほぼ平行で、該中間筒のフィン状突出部先
端と金属外筒内周面を接合するとともに、前記中間筒内
周面と前記ハニカム体外周面とを接合したことを特徴と
する耐熱疲労性に優れた自動車排ガス浄化触媒用金属基
体にある。SUMMARY OF THE INVENTION A gist of the present invention is to provide a honeycomb body formed by superposing and winding a flat metal foil and a corrugated metal foil, and the honeycomb body is fitted. In a metal base for an automobile exhaust gas purifying catalyst, a metal outer cylinder which is, and between the honeycomb body and the metal outer cylinder, a stainless steel intermediate cylinder provided with a plurality of fin-shaped protrusions on its outer peripheral surface is fitted. The fin-shaped protruding portion of the intermediate cylinder extends in the circumferential direction or the oblique direction of the intermediate cylinder, and the straight line connecting the two notch tips of the fin-shaped protruding portion and the intermediate cylinder is substantially parallel to the axial direction of the intermediate cylinder. An automobile having excellent heat fatigue resistance, characterized in that the fin-shaped projections of the intermediate cylinder are joined to the inner peripheral surface of the metal outer cylinder, and the inner peripheral surface of the intermediate cylinder is joined to the outer peripheral surface of the honeycomb body. It is on a metal substrate for an exhaust gas purification catalyst.
【００１０】以下、本発明を詳細に説明する。本発明に
おいては、金属外筒とハニカム体との間に中間筒が存在
し、かつ、この中間筒の周方向または斜め方向にフィン
状突出部を設け、かつ、フィン状突出部と中間筒との二
つの切欠先端部を結ぶ直線が中間筒の軸方向にほぼ平行
で、フィン状突出部を金属外筒と接合し、中間筒の内周
面とハニカム体を接合しているので、使用時に熱膨張差
に起因する熱歪が生じても、この中間筒、特に担体の周
方向乃至は斜め方向に突出したフィン状突出部全体で熱
歪を分担し吸収する。これによって、金属外筒とハニカ
ム体の接合部における剥離を防止する。Hereinafter, the present invention will be described in detail. In the present invention, the intermediate cylinder exists between the metal outer cylinder and the honeycomb body, and the fin-shaped protrusion is provided in the circumferential direction or the oblique direction of the intermediate cylinder, and the fin-shaped protrusion and the intermediate cylinder are provided. The straight line connecting the two notch tips of the is almost parallel to the axial direction of the intermediate cylinder, the fin-shaped protrusion is joined to the metal outer cylinder, and the inner peripheral surface of the intermediate cylinder is joined to the honeycomb body. Even if thermal strain due to the difference in thermal expansion occurs, the intermediate cylinder, particularly the fin-shaped protrusions protruding in the circumferential direction or the oblique direction of the carrier, share and absorb the thermal strain. This prevents peeling at the joint between the metal outer cylinder and the honeycomb body.
【００１１】これに対して、実開昭６３−２８８２２号
公報に開示された従来技術において、本発明の目的のよ
うに、より一層強固で長時間の使用に耐えるために金属
外筒とハニカム体を接合すると、熱歪はフィン状突出部
の根本に集中し、エンジンによる耐久試験中にフィン状
突出部の根本部が疲労破壊して切れることを本発明者ら
は知見している。これは、切り出された周方向に曲率を
持つフィン状突出部は中間筒の半径方向には剛性が高く
て、フィンの長さが短い場合に半径方向に曲げを加える
とフィンは曲がらずにその根本で曲がるからである。一
方、本発明のようにフィンの方向を周方向または斜め方
向にして、かつフィン状突出部と中間筒との二つの切欠
先端部を結ぶ直線が中間筒の軸方向にほぼ平行になるよ
うにすると、半径方向の曲げに対してフィン全体が曲が
るので歪がフィン全体に分散されることとなり、長時間
の使用に耐えられる。On the other hand, in the prior art disclosed in Japanese Utility Model Laid-Open No. 63-28822, the metal outer cylinder and the honeycomb body are made stronger and more durable for long-term use as in the object of the present invention. The inventors of the present invention have found that the thermal strain concentrates on the roots of the fin-shaped protrusions, and the roots of the fin-shaped protrusions are broken by fatigue during the durability test by the engine. This is because the cut-out fin-shaped protrusions having a curvature in the circumferential direction have high rigidity in the radial direction of the intermediate cylinder, and if the fins are short in length and bent in the radial direction, the fins will not bend. Because it turns at the root. On the other hand, as in the present invention, the direction of the fins is set to the circumferential direction or the oblique direction, and the straight line connecting the two notch tips of the fin-shaped protrusion and the intermediate cylinder is substantially parallel to the axial direction of the intermediate cylinder. Then, the entire fin bends with respect to the bending in the radial direction, so that the strain is dispersed over the entire fin, and it is possible to endure long-term use.
【００１２】[0012]
【発明の実施の形態】以下、本発明を、図面を参照しな
がら好ましい実施態様に基づいてさらに詳細に説明す
る。図１に、本発明に係わる金属担体を示す。本発明に
おいては、金属外筒２とハニカム体１の間に嵌装する中
間筒３として、その外周に複数のフィン状突出部４を設
けた、たとえばステンレス鋼製の中間筒を構成要素とし
ている。図２において、フィン状突出部４の突出方向が
示されている。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on preferred embodiments with reference to the drawings. FIG. 1 shows a metal carrier according to the present invention. In the present invention, as the intermediate cylinder 3 fitted between the metal outer cylinder 2 and the honeycomb body 1, for example, an intermediate cylinder made of stainless steel having a plurality of fin-shaped protrusions 4 on its outer periphery is used as a constituent element. . In FIG. 2, the protruding direction of the fin-shaped protruding portion 4 is shown.
【００１３】このフィン状突出部４は、中間筒自体にコ
字状の切り込みを入れ（たとえばパンチング加工によっ
て入れることができる）、外方に引き起こして形成する
ことが好ましいが、勿論、別個にフィンを取り付けても
よい。フィン状突出部４と金属外筒２の内周面との接合
は、フィン状突出部４の先端の一部（斜線部分）で行
い、フィン状突出部４の基部側は非接合として残すこと
が必要である。また、ハニカム体１との接合は、中間筒
の内周面の周方向の一部或いは全面で行う。It is preferable that the fin-shaped protrusion 4 is formed by making a U-shaped notch in the intermediate cylinder itself (which can be formed by punching, for example), and raising it outward, but of course it is a separate fin. May be attached. The fin-shaped protruding portion 4 and the inner peripheral surface of the metal outer tube 2 are joined at a part of the tip of the fin-shaped protruding portion 4 (hatched portion), and the base side of the fin-shaped protruding portion 4 is left unbonded. is necessary. The joining with the honeycomb body 1 is performed on a part or the entire surface of the inner peripheral surface of the intermediate cylinder in the circumferential direction.
【００１４】なお、図２（ａ）に示すフィン状突出部４
の形成方向は、その中心線（最も熱歪吸収の大きな方向
とも言える）を中間筒の軸方向に直角な方向に突出させ
た例であり、特に半径方向の熱歪に対して有効な形態で
ある。図２（ｂ）に示すフィン状突出部４は、排ガス流
の斜め下流向きに形成した例、図２（ｃ）に示すフィン
状突出部４は、逆に排ガス流の斜め上流向きに形成した
例である。なお、いずれの場合にもフィン状突出部と中
間筒との二つの切欠先端部を結ぶ直線（図１、図２の点
線）は中間筒の軸方向にほぼ平行である。The fin-shaped protrusion 4 shown in FIG.
The direction of formation of is an example in which the center line (which can be said to be the direction in which the greatest thermal strain absorption) is projected in the direction perpendicular to the axial direction of the intermediate cylinder, and is particularly effective for radial thermal strain. is there. The fin-shaped protrusion 4 shown in FIG. 2 (b) is formed obliquely downstream of the exhaust gas flow, and the fin-shaped protrusion 4 shown in FIG. 2 (c) is formed obliquely upstream of the exhaust gas flow. Here is an example. In any case, the straight line connecting the two notch tips of the fin-shaped protrusion and the intermediate cylinder (dotted line in FIGS. 1 and 2) is substantially parallel to the axial direction of the intermediate cylinder.
【００１５】本発明は上述のように、金属外筒２とハニ
カム体１との間に中間筒３を介在させて、間接的に金属
外筒２とハニカム体１とを接合するとともに、該中間筒
にフィン状突出部４を設けてその一部を金属外筒の内周
面に接合しているから、高速連続運転に耐える十分な強
度を有しかつ、担体使用時の急激な加熱・冷却サイクル
によって金属外筒２とハニカム体１との間に熱膨張差が
生じこれによって熱歪が発生しても、このフィン状突出
部４の非接合部分で吸収することができる。金属外筒２
とハニカム体１との間に熱膨張差に起因する熱歪が軸方
向或いは半径方向におけるものであっても、吸収可能で
ある。In the present invention, as described above, the metal outer cylinder 2 and the honeycomb body 1 are indirectly joined by interposing the intermediate cylinder 3 between the metal outer cylinder 2 and the honeycomb body 1. Since the fin-shaped protrusion 4 is provided on the cylinder and a part of the fin-shaped protrusion 4 is joined to the inner peripheral surface of the metal outer cylinder, it has sufficient strength to withstand high-speed continuous operation, and rapid heating / cooling during carrier use. Even if a thermal expansion difference is generated between the metal outer cylinder 2 and the honeycomb body 1 due to the cycle, and thereby thermal strain is generated, it can be absorbed by the non-bonding portion of the fin-shaped protrusion 4. Metal outer cylinder 2
The thermal strain due to the difference in thermal expansion between the honeycomb body 1 and the honeycomb body 1 can be absorbed even in the axial direction or the radial direction.
【００１６】[0016]
（実施例１） 試験用担体（突出部として図２（ｃ）を設けた例） ハニカム体：厚み５０μｍの２０％Ｃｒ−５％Ａｌのス
テンレス波箔と平箔を３６巻きして作製。 外筒：内径１００mm，厚み１．５mm，長さ１００mmのス
テンレス鋼製。 中間筒：内径１００mm，厚み０．３mm，長さ１００mmの
ステンレス鋼製の筒に、１５mm ｈ×１０mm ｌ×１０
mm ｗ（図２（ｃ）参照）のフィン状突出部を、周方向
に１５個、軸方向に４列（計６０個）形成した。 担体接合条件 中間筒内面の中央部４０mm幅で全周にわたってハニカム
体とＮｉろう材によりろう付け、フィン状突出部の先端
５mm×１０mm幅の領域で外筒内面とＮｉろう材によりろ
う付けした。これにPt触媒を担持させたγ−アルミナを
焼付ける。 試験条件 排気量２０００ｃｃのエンジンに上記担体を搭載し、ベ
ンチテストにより８００℃以上１分、１５０℃以下１
分、合計１サイクル１５分の冷熱試験を行った。尚、比
較例として中間筒を介在させずに外筒とハニカム体を直
接接合した担体を上記と同一条件で試験した。 試験結果 この基体は冷熱１２００サイクル後も何ら異常は認めら
れなかった。(Example 1) Test carrier (example in which FIG. 2 (c) is provided as a protrusion) Honeycomb body: A stainless corrugated foil of 20% Cr-5% Al having a thickness of 50 μm and a flat foil were wound 36 times to manufacture them. Outer cylinder: stainless steel with an inner diameter of 100 mm, a thickness of 1.5 mm, and a length of 100 mm. Intermediate cylinder: Stainless steel cylinder with inner diameter of 100 mm, thickness of 0.3 mm and length of 100 mm, 15 mm h × 10 mm l × 10
15 fin-shaped protrusions of mm w (see FIG. 2C) were formed in the circumferential direction and 4 rows (60 in total) in the axial direction. Carrier Bonding Conditions The honeycomb body and the Ni brazing material were brazed over the entire circumference at the central portion of the inner surface of the intermediate cylinder with a width of 40 mm, and the inner surface of the outer cylinder and the Ni brazing material were brazed in the region of the tip 5 mm × 10 mm width of the fin-shaped protrusion. Γ-alumina carrying Pt catalyst is baked on it. Test conditions The above carrier was mounted on an engine with a displacement of 2000 cc, and a bench test was conducted at 800 ° C or higher for 1 minute and 150 ° C or lower 1
Min, a total of 1 cycle 15 minutes of the thermal test. As a comparative example, a carrier in which the outer cylinder and the honeycomb body were directly joined without interposing the intermediate cylinder was tested under the same conditions as above. Test Results No abnormality was found on this substrate after 1200 cycles of cold heat.
【００１７】[0017]
【発明の効果】以上説明したように本発明の金属基体に
よれば、過酷な冷熱サイクルによる熱膨張差により剥離
のおそれがあった外筒とハニカム体との接合部に、緩衝
体として全ての方向の熱歪を吸収する中間体を介在させ
ていることから、上記の過酷な条件下でも接合部の剥離
やハニカム体の破断を効果的に防止することが出来た。As described above, according to the metal substrate of the present invention, all of the buffer bodies are used as a buffer at the joint portion between the outer cylinder and the honeycomb body, which may be peeled off due to the difference in thermal expansion due to the severe cooling and heating cycle. Since the intermediate body that absorbs the thermal strain in the direction is interposed, it is possible to effectively prevent the peeling of the bonded portion and the breakage of the honeycomb body even under the severe conditions described above.
【図１】本発明に係る金属基体の実施例を示す斜視図。FIG. 1 is a perspective view showing an embodiment of a metal substrate according to the present invention.
【図２】本発明の他の実施例を示すフィン状突出部の各
種形態を示す説明図。FIG. 2 is an explanatory view showing various forms of fin-shaped protrusions according to another embodiment of the present invention.
１ ハニカム体 ２ 外筒 ３ 中間筒 ４ フィン状突出部 1 Honeycomb body 2 Outer cylinder 3 Intermediate cylinder 4 Fin-shaped protrusion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 天藤 雅之 神奈川県相模原市淵野辺５−10−１ 新日 本製鐵株式会社第２技術研究所内 (72)発明者 左田野 豊 千葉県君津市君津１番地 新日本製鐵株式 会社君津製鐵所内 (72)発明者 中川 俊和 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 西沢 良雄 東京都千代田区丸の内３丁目３−１ 日本 金属株式会社内 (72)発明者 笠原 昭彦 東京都板橋区舟渡４丁目10−１ 株式会社 日金総研内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Masayuki Tendo 5-10-1, Fuchinobe, Sagamihara City, Kanagawa Pref., Second Research Laboratory, Nippon Steel Corporation (72) Yutaka Sadano Kimitsu, Kimitsu City, Chiba Prefecture No. 1 Nippon Steel Co., Ltd. Kimitsu Steel Co., Ltd. (72) Inventor Toshikazu Nakagawa 5-3 Tokai-cho, Tokai City, Aichi Prefecture Nippon Steel Co., Ltd. Nagoya Steel Co., Ltd. Marunouchi 3-chome 3-1 Nippon Metal Co., Ltd. (72) Inventor Akihiko Kasahara 4-chome Funato, Itabashi-ku, Tokyo 10-1 Nichikin Research Institute Co., Ltd.
Claims (1)
箔とを重ねて巻き込んで形成したハニカム体と、該ハニ
カム体が嵌装される金属外筒と、前記ハニカム体と金属
外筒の間に、その外周面に複数のフィン状突出部を設け
たステンレス鋼製中間筒を嵌装してなる自動車排ガス浄
化触媒用金属基体において、前記中間筒のフィン状突出
部が中間筒の周方向または斜め方向に延びており、かつ
フィン状突出部と中間筒との二つの切欠先端部を結ぶ直
線が中間筒の軸方向にほぼ平行で、該中間筒のフィン状
突出部先端と金属外筒内周面を接合するとともに、前記
中間筒内周面と前記ハニカム体外周面とを接合したこと
を特徴とする耐熱疲労性に優れた自動車排ガス浄化触媒
用金属基体。1. A honeycomb body formed by stacking and winding a flat metal foil and a corrugated metal foil, a metal outer cylinder into which the honeycomb body is fitted, a honeycomb body and a metal outer cylinder. In a metal substrate for an automobile exhaust gas purifying catalyst in which a stainless steel intermediate cylinder having a plurality of fin-shaped protrusions provided on the outer peripheral surface thereof is fitted, the fin-shaped protrusions of the intermediate cylinder are Direction or diagonal direction, and the straight line connecting the two notch tips of the fin-shaped protrusion and the intermediate cylinder is substantially parallel to the axial direction of the intermediate cylinder, and A metal substrate for an automobile exhaust gas purification catalyst excellent in heat fatigue resistance, characterized in that the inner peripheral surface of the cylinder is joined and the inner peripheral surface of the intermediate cylinder is joined to the outer peripheral surface of the honeycomb body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7304399A JP2729041B2 (en) | 1995-11-22 | 1995-11-22 | Metal substrate for automotive exhaust gas purification catalyst with excellent thermal fatigue resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7304399A JP2729041B2 (en) | 1995-11-22 | 1995-11-22 | Metal substrate for automotive exhaust gas purification catalyst with excellent thermal fatigue resistance |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1116137A Division JP2520475B2 (en) | 1989-05-11 | 1989-05-11 | Metal substrate for automobile exhaust gas purification catalyst with excellent heat fatigue resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08210128A true JPH08210128A (en) | 1996-08-20 |
| JP2729041B2 JP2729041B2 (en) | 1998-03-18 |
Family
ID=17932553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7304399A Expired - Lifetime JP2729041B2 (en) | 1995-11-22 | 1995-11-22 | Metal substrate for automotive exhaust gas purification catalyst with excellent thermal fatigue resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2729041B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19946633A1 (en) * | 1999-09-29 | 2001-04-05 | Volkswagen Ag | Anchoring component holding catalyst in exhaust channel, comprises sheet metal casing accommodating catalyst and making interference fit with channel walls |
| JP2002332821A (en) * | 2001-05-11 | 2002-11-22 | Marusan:Kk | Exhaust filter |
| WO2012067156A1 (en) * | 2010-11-18 | 2012-05-24 | 日本碍子株式会社 | Heat conduction member |
| JP2012202657A (en) * | 2011-03-28 | 2012-10-22 | Ngk Insulators Ltd | Heat conducting member |
| JP2012207845A (en) * | 2011-03-29 | 2012-10-25 | Ngk Insulators Ltd | Heat-conducting material |
| JP2015148437A (en) * | 2015-04-27 | 2015-08-20 | 日本碍子株式会社 | heat conduction member |
| JP2015165181A (en) * | 2015-04-27 | 2015-09-17 | 日本碍子株式会社 | heat conduction member |
| CN110260312A (en) * | 2019-06-20 | 2019-09-20 | 华帝股份有限公司 | Infrared metal honeycomb body and infrared burner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6284611U (en) * | 1985-10-24 | 1987-05-29 | ||
| JPS6328822U (en) * | 1986-08-11 | 1988-02-25 |
-
1995
- 1995-11-22 JP JP7304399A patent/JP2729041B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6284611U (en) * | 1985-10-24 | 1987-05-29 | ||
| JPS6328822U (en) * | 1986-08-11 | 1988-02-25 |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19946633A1 (en) * | 1999-09-29 | 2001-04-05 | Volkswagen Ag | Anchoring component holding catalyst in exhaust channel, comprises sheet metal casing accommodating catalyst and making interference fit with channel walls |
| DE19946633B4 (en) * | 1999-09-29 | 2008-06-12 | Volkswagen Ag | Exhaust device with a locking element for a catalyst in an exhaust passage |
| JP2002332821A (en) * | 2001-05-11 | 2002-11-22 | Marusan:Kk | Exhaust filter |
| CN103221772A (en) * | 2010-11-18 | 2013-07-24 | 日本碍子株式会社 | Heat conduction member |
| WO2012067156A1 (en) * | 2010-11-18 | 2012-05-24 | 日本碍子株式会社 | Heat conduction member |
| JP5955775B2 (en) * | 2010-11-18 | 2016-07-20 | 日本碍子株式会社 | Thermal conduction member |
| US9739540B2 (en) | 2010-11-18 | 2017-08-22 | Ngk Insulators, Ltd. | Heat conduction member |
| JP2012202657A (en) * | 2011-03-28 | 2012-10-22 | Ngk Insulators Ltd | Heat conducting member |
| JP2012207845A (en) * | 2011-03-29 | 2012-10-25 | Ngk Insulators Ltd | Heat-conducting material |
| JP2015148437A (en) * | 2015-04-27 | 2015-08-20 | 日本碍子株式会社 | heat conduction member |
| JP2015165181A (en) * | 2015-04-27 | 2015-09-17 | 日本碍子株式会社 | heat conduction member |
| CN110260312A (en) * | 2019-06-20 | 2019-09-20 | 华帝股份有限公司 | Infrared metal honeycomb body and infrared burner |
| CN110260312B (en) * | 2019-06-20 | 2024-05-28 | 华帝股份有限公司 | Infrared metal honeycomb body and infrared burner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2729041B2 (en) | 1998-03-18 |
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