JPH0822380B2 - Method for manufacturing carrier for exhaust gas purification catalyst - Google Patents
Method for manufacturing carrier for exhaust gas purification catalystInfo
- Publication number
- JPH0822380B2 JPH0822380B2 JP1257540A JP25754089A JPH0822380B2 JP H0822380 B2 JPH0822380 B2 JP H0822380B2 JP 1257540 A JP1257540 A JP 1257540A JP 25754089 A JP25754089 A JP 25754089A JP H0822380 B2 JPH0822380 B2 JP H0822380B2
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb body
- flat plate
- plate
- exhaust gas
- corrugated plate
- 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 - Lifetime
Links
- 239000003054 catalyst Substances 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 title description 7
- 238000000746 purification Methods 0.000 title 1
- 238000005304 joining Methods 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 description 23
- 239000002184 metal Substances 0.000 description 23
- 238000009792 diffusion process Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 12
- 230000003746 surface roughness Effects 0.000 description 11
- 230000008646 thermal stress Effects 0.000 description 8
- 238000005219 brazing Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910019589 Cr—Fe Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、内燃機関の排ガス浄化触媒に用いられるメ
タル担体の製造方法に関する。TECHNICAL FIELD The present invention relates to a method for producing a metal carrier used for an exhaust gas purifying catalyst for an internal combustion engine.
［従来の技術］ メタル担体においては、波板と平板およびハニカム体
と外筒とを一体的に接合する必要があり、ロウ付けによ
る接合、リベットなどによる機械的な接合が従来より行
なわれている。しかしながらロウ付けによる接合におい
ては、ロウ材の主成分であるニッケルとハニカム体の材
質との間の相互作用により、ハニカム体に脆化や収縮が
生じて外筒との間にずれが生じる場合がある。また機械
的な接合においては、接合箇所に応力集中が生じてハニ
カム体に亀裂が生じやすいという不具合がある。[Prior Art] In a metal carrier, it is necessary to integrally join a corrugated plate and a flat plate, and a honeycomb body and an outer cylinder, and joining by brazing and mechanical joining by rivets and the like have been conventionally performed. . However, in the joining by brazing, the interaction between the nickel, which is the main component of the brazing material, and the material of the honeycomb body may cause embrittlement or shrinkage of the honeycomb body to cause a gap with the outer cylinder. is there. Further, in mechanical joining, there is a problem that stress concentration occurs at the joining portion and cracks easily occur in the honeycomb body.
そこでこのような不具合を解消するものとして、特開
昭56-85514号、特開昭63-299875号などの公報には、拡
散接合により一体的に接合する方法が開示されている。In order to solve such a problem, Japanese Patent Laid-Open Nos. 56-85514 and 63-299875 disclose a method of integrally bonding by diffusion bonding.
［発明が解決しようとする課題］ ところで、触媒化されエンジン排気系に搭載されたメ
タル担体は、高温の排気ガスに晒されたり冷却されたり
していわゆる冷熱サイクルの繰返しを受ける。しかしな
がら上記した拡散接合により一体的に接合されたメタル
担体では、全体が均一に接合されている。そのためハニ
カム体には、膨脹と収縮の繰返しによる熱応力により局
部的な座屈や塑性変形が生じる。これはハニカム体の外
筒に近い表面部分で特に生じやすい。そしてこのような
変形が進行するとハニカム体に亀裂が発生し、ついには
ハニカム体が外筒からずれるという不都合が生じ、触媒
金属の剥離、圧損の増大などにつながる。したがって熱
応力を緩和できる構造の確立が望まれている。[Problems to be Solved by the Invention] By the way, a metal carrier which has been catalyzed and mounted in an engine exhaust system is exposed to high-temperature exhaust gas or cooled, and undergoes a so-called cold-heat cycle. However, in the metal carrier integrally joined by the diffusion joining described above, the whole is evenly joined. Therefore, the honeycomb body is locally buckled or plastically deformed due to thermal stress caused by repeated expansion and contraction. This is particularly likely to occur at the surface portion of the honeycomb body near the outer cylinder. Then, when such deformation progresses, a crack is generated in the honeycomb body, and finally the honeycomb body is displaced from the outer cylinder, which leads to peeling of the catalyst metal and increase in pressure loss. Therefore, establishment of a structure capable of relaxing thermal stress is desired.
本発明はこのような事情に鑑みてなされたものであ
り、拡散接合で接合するとともに熱応力を緩和できる構
造とすることを目的とする。The present invention has been made in view of such circumstances, and an object thereof is to provide a structure capable of relaxing thermal stress while being joined by diffusion joining.
［課題を解決するための手段および作用］ 本発明の排ガス浄化触媒用担体の製造方法は、波板と
平板を重ねて巻回してハニカム体を形成しハニカム体の
外周に外筒を配置した後非酸化性雰囲気下で加熱して少
なくとも波板と平板を拡散接合により一体化する排ガス
浄化触媒用担体の製造方法において、 少なくとも波板と平板との接触部の接触圧力を部分的
に変化させ接合強度を部分的に変化させるようにしたこ
と、および少なくとも波板と平板との接触部であって互
いに接触する２つの表面の少なくとも一方の面粗度を部
分的に変化させ接合強度を部分的に変化させるようにし
たことを特徴とする。[Means and Actions for Solving the Problems] In the method for producing a carrier for exhaust gas purifying catalyst of the present invention, a corrugated plate and a flat plate are superposed and wound to form a honeycomb body, and an outer cylinder is arranged on the outer periphery of the honeycomb body. In a method of manufacturing an exhaust gas purifying catalyst carrier in which at least a corrugated plate and a flat plate are integrated by diffusion bonding by heating in a non-oxidizing atmosphere, at least the contact pressure at the contact portion between the corrugated plate and the flat plate is partially changed and bonded. The strength is partially changed, and the joint strength is partially changed by partially changing the surface roughness of at least one of the two surfaces that are in contact with each other at the contact portion between the corrugated plate and the flat plate. The feature is that it is changed.
ハニカム体は、波板と平板とを重ねた状態でロール状
に巻回して形成される。波板は、通常平板を波形状に曲
折して形成され、通常、平板と同材質で同一板厚を有し
ている。この波板および平板は、従来と同様に例えばAl
-Cr-Fe合金、ステンレス鋼などから形成される。そして
限られた容積中にできるだけ多くのハニカム通路を確保
することが好ましいことから、板厚は例えば50μｍなど
比較的薄いものが用いられる。The honeycomb body is formed by winding a corrugated plate and a flat plate in a roll shape in a stacked state. The corrugated plate is usually formed by bending a flat plate into a corrugated shape, and usually has the same material and the same plate thickness as the flat plate. This corrugated plate and flat plate are made of, for example, Al as in the conventional case.
-Formed from Cr-Fe alloy, stainless steel, etc. Since it is preferable to secure as many honeycomb passages as possible in a limited volume, a relatively thin plate having a thickness of, for example, 50 μm is used.
外筒は例えばステンレス鋼製など従来と同様のものを
用いることができ、その板厚は通常１〜2mm程度であ
る。この外筒は筒状に予め形成されたものを用いてもよ
いし、ハニカム体の表面に巻回して略筒状とすることも
できる。As the outer cylinder, for example, a conventional one such as stainless steel can be used, and the plate thickness thereof is usually about 1 to 2 mm. The outer cylinder may be one formed in advance in a cylindrical shape, or may be wound around the surface of the honeycomb body to be a substantially cylindrical shape.
少なくともハニカム体の波板と平板との接合は拡散接
合によって行なわれる。ハニカム体と外筒との接合は機
械的な接合あるいはロウ付けなどによって行なうことも
できるが、波板と平板の接合時に同時に拡散接合により
接合することが望ましい。At least the corrugated plate and the flat plate of the honeycomb body are bonded by diffusion bonding. The honeycomb body and the outer cylinder can be joined by mechanical joining or brazing, but it is desirable to join the corrugated sheet and the flat plate simultaneously by diffusion joining.
この拡散接合は、メタル担体の酸化を防止するために
真空中、不活性気体中あるいは水素ガス中などの非酸化
性雰囲気下で加熱することにより行なわれる。加熱温度
は一般に1000〜1400℃、加熱時間は10〜300分程度であ
る。This diffusion bonding is carried out by heating in a non-oxidizing atmosphere such as vacuum, inert gas or hydrogen gas in order to prevent the metal carrier from being oxidized. The heating temperature is generally 1000 to 1400 ° C, and the heating time is about 10 to 300 minutes.
本発明者らはメタル担体の耐久試験によりその破壊に
ついて鋭意研究した結果、ハニカム体内部の接合位置
と、ハニカム体と外筒との接合位置との相対関係が耐久
強度に大きく関係していることを見出した。そして特
に、波板と平板との接触点を全面に接合した場合に、熱
応力が大きく座屈や塑性変形が生じやすいことを見出し
て本発明に至ったものである。As a result of intensive studies on the destruction of the metal carrier by a durability test of the metal carrier, the relative relationship between the bonding position inside the honeycomb body and the bonding position between the honeycomb body and the outer cylinder is greatly related to the durability strength. Found. Then, in particular, when the contact point between the corrugated plate and the flat plate is joined to the entire surface, the present invention has been found out that thermal stress is large and buckling or plastic deformation is likely to occur.
すなわち本発明の一つの特徴は、拡散接合で接合され
る接触部の接合強度を部分的に変化させるようにしたと
ころにある。拡散接合の場合には、接触部の接触圧力が
高いほど接合強度が大きく、接触圧力が低いほど接合強
度が小さくなる。したがって接合強度を部分的に変化さ
せるようにするには、接触部の接触圧力を部分的に変化
させるようにすればよい。以下に接触圧力を部分的に変
化させるようにする方法を説明する。That is, one feature of the present invention resides in that the joining strength of the contact portion joined by diffusion joining is partially changed. In the case of diffusion bonding, the higher the contact pressure at the contact portion, the higher the bonding strength, and the lower the contact pressure, the lower the bonding strength. Therefore, in order to partially change the bonding strength, the contact pressure of the contact portion may be partially changed. Hereinafter, a method for partially changing the contact pressure will be described.
例えば波板の波の高さを部分的に変化させることで行
なうことができる。波板と平板とを重ねて巻回した場
合、接触部は波板の波の頂部となる。したがって波の高
さが高い部分ほど高い圧力で平板と接触することとな
る。なお、あまり高くし過ぎると低い波の部分と平板と
の間に隙間が生じ、ハニカム通路に変形が生じる場合が
ある。部分的に高くする場合は一般部分の波の高さの３
〜20％の範囲が好ましい。For example, it can be performed by partially changing the height of the waves of the corrugated plate. When the corrugated plate and the flat plate are overlapped and wound, the contact portion is the wave top of the corrugated plate. Therefore, the higher the height of the wave, the higher the pressure that the plate comes into contact with. If it is set too high, a gap may be formed between the low wave portion and the flat plate, and the honeycomb passage may be deformed. If you want to make it partly high, the wave height of the general part is 3
The range of up to 20% is preferred.
また、波の断面形状を部分的に変化させることで行な
うこともできる。すなわち波板と平板とを巻回した場
合、接触面積が小さいほど接触圧力が高くなる。したが
って波の頂部の面積を部分的に小さくすることにより、
その部分の接触圧力を部分的に高くすることができる。
波の断面形状が台形形状であれば、その上辺の長さを短
くして断面三角形状に近付けることにより接触圧力を高
くすることができる。It can also be performed by partially changing the cross-sectional shape of the wave. That is, when the corrugated plate and the flat plate are wound, the smaller the contact area, the higher the contact pressure. Therefore, by partially reducing the area of the top of the wave,
The contact pressure at that portion can be partially increased.
If the wave has a trapezoidal cross-sectional shape, the contact pressure can be increased by shortening the length of the upper side of the wave so that the cross-section has a triangular shape.
さらに、接触部の板厚を部分的に厚くしても同様に接
触圧力を高くすることができる。また、この場合も接触
面積を小さくするために、板厚の厚い部分の接触表面を
曲面状などとすることが望ましい。なお、あまり厚くし
過ぎると薄い部分で隙間が生じ、ハニカム通路に変形が
生じる場合がある。部分的に厚くする場合は一般部分の
板厚の５〜20％の範囲が好ましい。Further, even if the plate thickness of the contact portion is partially increased, the contact pressure can be similarly increased. Also in this case, in order to reduce the contact area, it is desirable that the contact surface of the thick portion has a curved shape. If it is made too thick, a gap may be formed in the thin portion, and the honeycomb passage may be deformed. When the thickness is partially increased, it is preferably in the range of 5 to 20% of the plate thickness of the general portion.
また、特殊な方法として巻回時の締め力を部分的に変
化させることで接触圧力を変化させることもできる。た
だし、この場合は周方向に接合強度が分布するようにな
るので、上記方法を併用して軸方向にも分布するように
することが望ましい。As a special method, the contact pressure can be changed by partially changing the tightening force during winding. However, in this case, since the bonding strength is distributed in the circumferential direction, it is desirable to use the above method together and distribute it in the axial direction.
以上、接触圧力を部分的に変化させることで接合強度
を部分的に変化させる方法を述べたが、本発明のもう一
つの特徴は、接触部の面粗度を部分的に変化させるとこ
ろにある。拡散接合の場合には、接合強度は接触部の面
粗度に大きく依存する。すなわち面粗度が小さいほど接
合強度が大きくなるので、部分的に面粗度の小さい平滑
な接触面を形成すればその部分の接合強度を大きくする
ことができる。なお、面粗度の大小は組合わせによる
が、接合強度の大の部分の面粗度はRz≦１μｍ、接合強
度が小の部分はRz＝１〜10μｍ程度とすることができ
る。The method of partially changing the bonding strength by partially changing the contact pressure has been described above, but another feature of the present invention is that the surface roughness of the contact portion is partially changed. . In the case of diffusion bonding, the bonding strength largely depends on the surface roughness of the contact part. That is, the smaller the surface roughness is, the higher the bonding strength is. Therefore, if a smooth contact surface having a small surface roughness is partially formed, the bonding strength at that portion can be increased. Although the surface roughness depends on the combination, the surface roughness of the portion having the high bonding strength can be Rz ≦ 1 μm, and the area of the low bonding strength can be Rz = 1 to 10 μm.
メタル担体の場合、軸方向の両端部、特に排ガス流入
側の端部が膨脹・収縮量が大きく内部ほど小さい。した
がって軸方向の両端部で接合強度を大きくし、中央部で
接合強度を小さくして熱応力を緩和するようにすること
が望ましい。In the case of a metal carrier, the both ends in the axial direction, particularly the end on the exhaust gas inflow side, has a large expansion / contraction amount, and becomes smaller toward the inside. Therefore, it is desirable to increase the joint strength at both ends in the axial direction and reduce the joint strength at the central portion so as to alleviate the thermal stress.
［発明の効果］ 本発明の製造方法によれば、拡散接合で接合強度を大
きくしたい部分および小さくしたい部分を自由に選択す
ることができる。したがって設計の自由度が著しく増大
し、目的とする性能を有する担体を極めて容易に製造す
ることができる。そして本発明の製造方法により得られ
る排ガス浄化触媒用担体によれば、熱応力が作用した場
合にその熱応力を緩和することができ、ハニカム体の座
屈、塑性変形、ひいては亀裂の発生を防止することがで
きるので、耐久性が著しく向上する。[Effects of the Invention] According to the manufacturing method of the present invention, it is possible to freely select a portion for which the bonding strength is desired to be increased and a portion for which the bonding strength is desired to be decreased by diffusion bonding. Therefore, the degree of freedom in design is remarkably increased, and a carrier having desired performance can be extremely easily manufactured. And, according to the exhaust gas purifying catalyst carrier obtained by the production method of the present invention, the thermal stress can be relaxed when the thermal stress acts, and the buckling of the honeycomb body, the plastic deformation, and the occurrence of cracks are prevented. Therefore, the durability is remarkably improved.
そしてハニカム体と外筒との接合も拡散接合で行なえ
ば、外筒内面の粗度、形状、清浄度などにより接合強度
を部分的に変化させることができるので、耐久性を一層
向上させることができる。If the honeycomb body and the outer cylinder are also bonded by diffusion bonding, the bonding strength can be partially changed depending on the roughness, shape, cleanliness, etc. of the inner surface of the outer cylinder, so that the durability can be further improved. it can.
また、板厚を部分的に厚くした場合には、材質として
アルミニウムを含有する合金を用いることによりアルミ
ニウム含有量が増大する。したがってアルミナ被膜が厚
く形成されることなり、耐酸化性が向上する。When the plate thickness is partially increased, the aluminum content is increased by using an alloy containing aluminum as the material. Therefore, the alumina coating is formed thick, and the oxidation resistance is improved.
さらに、面粗度を変化させた場合には、触媒担持層と
しての活性アルミナの付着量も変化するので、触媒金属
の付着量を部分的に変化させることができ、触媒金属の
有効利用が可能となり触媒性能の向上を図ることができ
る。Furthermore, when the surface roughness is changed, the amount of activated alumina deposited as the catalyst supporting layer also changes, so the amount of catalytic metal deposited can be partially changed, and the catalytic metal can be effectively used. Therefore, the catalyst performance can be improved.
［実施例］ 以下、実施例により具体的に説明する。[Examples] Hereinafter, specific examples will be described.
（実施例１） 20Cr-5Al、残部Feからなる板厚50μｍの箔材を幅100m
mの平板と第７図に示す波板に加工し、平板と波板とを
重ねてロール状に巻回して、最外周に平板をもち外径97
φ長さ100mmのハニカム体を形成した。なお、波板加工
時に、幅100mmに対し両端部からそれぞれ20mmを、第１
図に示すように波の頂部の幅を小さくした。すなわち断
面台形状の波の上辺の長さを、両端から20mmまではL1＝
0.4〜0.6mm、中央部の60mmの部分はL2＝0.7〜0.9mmとし
た。(Example 1) A foil material having a plate thickness of 50 μm and composed of 20Cr-5Al and the balance Fe is 100 m wide.
The flat plate of m and the corrugated plate shown in Fig. 7 are processed, the flat plate and the corrugated plate are overlapped and wound into a roll, and the flat plate is provided at the outermost periphery and the outer diameter is 97
A honeycomb body having a φ length of 100 mm was formed. When processing the corrugated sheet, the width of 100 mm should be 20 mm from both ends.
As shown in the figure, the width of the top of the wave was reduced. That is, the length of the upper side of the wave with a trapezoidal cross section is L 1 = 20 mm from both ends.
L 2 = 0.7 to 0.9 mm was set for 0.4 to 0.6 mm and the central 60 mm portion.
そして別にSUS430から板厚1.5mm、外径100φ、長さ10
0mmの円筒状外筒を形成し、外筒内に箔状ロウ材を介し
てハニカム体を挿入した後、10-3〜10-6Torrの真空下、
1000〜1400℃の温度で10〜300分加熱して、波板と平板
との拡散接合およびハニカム体と外筒とのロウ付けを行
なった。And separately from SUS430, plate thickness 1.5 mm, outer diameter 100φ, length 10
After forming a cylindrical outer cylinder of 0 mm and inserting the honeycomb body through the foil brazing material in the outer cylinder, under a vacuum of 10 -3 to 10 -6 Torr,
Heating was performed at a temperature of 1000 to 1400 ℃ for 10 to 300 minutes to perform diffusion bonding between the corrugated plate and the flat plate and brazing between the honeycomb body and the outer cylinder.
得られたメタル担体に活性アルミナよりなる触媒担持
層を被覆し、常法によりPt、PdおよびRhを担持させた。
そして3000ccの直列６気筒エンジンの排気系に搭載し、
空燃比14.6で、入力ガス温度850℃−10分、200℃−10分
のサイクルを100時間行なう耐久試験を行なった。耐久
試験後、メタル担体の外観状況を目視で調査し、ハニカ
ム体の亀裂の有無などを調べた。結果を表に示す。The obtained metal carrier was coated with a catalyst supporting layer made of activated alumina, and Pt, Pd and Rh were supported by a conventional method.
And installed in the exhaust system of the 3000cc inline 6-cylinder engine,
An endurance test was conducted with an air-fuel ratio of 14.6 and a cycle of input gas temperature of 850 ° C for 10 minutes and 200 ° C for 10 minutes for 100 hours. After the durability test, the appearance of the metal carrier was visually inspected to check the presence or absence of cracks in the honeycomb body. The results are shown in the table.
（実施例２） 波板加工時に、幅100mmに対し両端部からそれぞれ20m
mを、第２図に示すように波の頂部の高さを高くしたこ
と以外は実施例１と同様である。すなわち断面台形状の
波の高さを、両端から20mmまではh1≒1.3mm、中央部の6
0mmの部分はh2≒1.2mmとした。(Example 2) At the time of processing a corrugated sheet, a width of 100 mm is 20 m from each end.
The m is the same as in Example 1 except that the height of the crest of the wave is increased as shown in FIG. That is, the height of a trapezoidal wave is h 1 ≈ 1.3 mm from both ends to 20 mm, and 6
The portion of 0 mm was set to h 2 ≈1.2 mm.
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（実施例３） 波板加工時に、幅100mmに対し両端部からそれぞれ20m
mを、第３図に示すように波の頂部の幅を小さくし、か
つ波の頂部の高さを高くしたこと以外は実施例１と同様
である。すなわち断面台形状の波の上辺の長さを、両端
から20mmまではL1＝0.5〜0.6mm、中央部の60mmの部分は
L2＝0.7〜0.8mmとするとともに、波の高さを、両端から
20mmまではh1≒1.3mm、中央部の60mmの部分はh2≒1.2mm
とした。(Example 3) When processing a corrugated sheet, a width of 100 mm is 20 m from each end.
The m is the same as in Example 1 except that the width of the crest of the wave is reduced and the height of the crest of the wave is increased as shown in FIG. That is, the length of the upper side of the wave with a trapezoidal cross section is L 1 = 0.5 to 0.6 mm from both ends to 20 mm, and the central part of 60 mm is
L 2 = 0.7 to 0.8 mm and the wave height from both ends
H 1 ≈ 1.3 mm up to 20 mm, h 2 ≈ 1.2 mm for the central 60 mm part
And
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（実施例４） 波板加工時に、幅100mmに対し両端部からそれぞれ5mm
を、第４図に示すように板厚を厚くしたこと以外は実施
例１と同様である。すなわち板厚を、両端から5mmまで
はt1＝55μｍ、中央部の90mmの部分はt2＝50μｍとし
た。なお、板厚の厚い部分は両端から10mm以内が適当で
ある。10mm以上深くまで厚くすると、接触圧力がむしろ
低下する傾向にある。(Example 4) When processing a corrugated sheet, a width of 100 mm is 5 mm from each end.
Is the same as Example 1 except that the plate thickness is increased as shown in FIG. That is, the plate thickness was t 1 = 55 μm from both ends to 5 mm, and t 2 = 50 μm in the central 90 mm part. In addition, it is appropriate that the thick part is within 10 mm from both ends. If the thickness is deeper than 10 mm, the contact pressure tends to decrease.
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（実施例５） 担体の端部となる波板と平板のそれぞれの両端部に、
第５図に示すように略円柱状の肉厚部を設けたこと以外
は実施例１と同様である。肉厚部の径t1は55μｍ、他の
部分の板厚t2は50μｍとした。(Example 5) At both ends of the corrugated plate and the flat plate, which are the ends of the carrier,
The procedure is the same as in Example 1 except that a thick portion having a substantially cylindrical shape is provided as shown in FIG. The diameter t 1 of the thick portion was 55 μm, and the plate thickness t 2 of the other portions was 50 μm.
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（実施例６） 波板と平板の両方について、幅100mmに対し両端部か
らそれぞれ20mmを第６図に示すように面粗度Rz＝0.3μ
ｍとし、中央部の60mmの部分は面粗度Rz＝２μｍとした
こと以外は実施例１と同様である。(Example 6) With respect to both the corrugated plate and the flat plate, the surface roughness Rz = 0.3μ as shown in FIG.
m is the same as in Example 1 except that the surface roughness Rz of the central 60 mm portion is Rz = 2 μm.
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（比較例１） 波板加工時に、幅100mm全体について、波の頂部の幅
を小さくし、かつ波の頂部の高さを高くしたこと以外は
実施例１と同様である。すなわち断面台形状の波の上辺
の長さを0.2〜0.4mm程度とするとともに、波の高さを1.
3mmの断面略三角形状の波とした。(Comparative Example 1) The same as Example 1 except that the width of the crest of the corrugated sheet was reduced and the height of the crest of the corrugated was increased for the entire width of 100 mm. That is, the length of the upper side of the trapezoidal wave is set to about 0.2 to 0.4 mm, and the height of the wave is 1.
The wave was 3 mm in cross section.
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（比較例２） 波板と平板の両方について、幅100mm全体の面粗度をR
z＝0.1〜0.3μｍとしたこと以外は実施例１と同様であ
る。(Comparative Example 2) For both the corrugated plate and the flat plate, the surface roughness of the entire width of 100 mm was R.
Same as Example 1 except that z = 0.1 to 0.3 μm.
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（比較例３） 拡散接合は行なわず、ハニカム体の両端から20mmの波
板と平板とをロウ付けにより接合したこと以外は実施例
１と同様である。(Comparative Example 3) The same as Example 1 except that the diffusion bonding was not performed and the corrugated plate and the flat plate of 20 mm from both ends of the honeycomb body were bonded by brazing.
得られたメタル担体について実施例１と同様に耐久試
験を行ない、ハニカム体の亀裂などを調べた。結果を表
に示す。A durability test was conducted on the obtained metal carrier in the same manner as in Example 1, and cracks in the honeycomb body were examined. The results are shown in the table.
（評価） 表より、実施例で得られたメタル担体では、ハ ニカム体に異常はみられず耐久性に優れていることがわ
かる。これは拡散接合の接合強度を部分的に変化させる
ことに起因することが明らかであり、熱応力が緩和され
たことによるものと考えられる。(Evaluation) From the table, in the metal carrier obtained in the example, It can be seen that there is no abnormality in the nicham body and it has excellent durability. It is clear that this is due to a partial change in the bonding strength of the diffusion bonding, and it is considered that the thermal stress is relaxed.
なお、実施例４と実施例５で得られたメタル担体で
は、耐久試験後のハニカム体端面の酸化がみられず耐酸
化性に特に優れていた。これは波板および平板の端部が
厚くなっているため、含まれるアルミニウム量がその分
多くなり、アルミナ被膜が厚く形成されて耐酸化性が出
現したものと考えられる。The metal carriers obtained in Examples 4 and 5 were particularly excellent in oxidation resistance since no oxidation was observed on the end faces of the honeycomb body after the durability test. It is considered that this is because the end portions of the corrugated plate and the flat plate were thick, so that the amount of aluminum contained was increased correspondingly, and the alumina coating was formed thick, and the oxidation resistance appeared.
第１図〜第６図は、それぞれ実施例で形成された波板又
は平板の形状を説明する説明図である。第７図は波板の
要部斜視図である。1 to 6 are explanatory views for explaining the shape of the corrugated plate or the flat plate formed in each example. FIG. 7 is a perspective view of a main part of the corrugated plate.
Claims (2)
形成し該ハニカム体の外周に外筒を配置した後非酸化性
雰囲気下で加熱して少なくとも該波板と該平板を拡散接
合により一体化する排ガス浄化触媒用担体の製造方法に
おいて、 少なくとも該波板と該平板との接触部の接触圧力を部分
的に変化させ接合強度を部分的に変化させるようにした
ことを特徴とする排ガス浄化触媒用担体の製造方法。1. A corrugated plate and a flat plate are overlapped and wound to form a honeycomb body, and an outer cylinder is arranged on the outer periphery of the honeycomb body, and then heated in a non-oxidizing atmosphere to diffuse at least the corrugated plate and the flat plate. In a method of manufacturing an exhaust gas purifying catalyst carrier that is integrated by joining, at least the contact pressure at the contact portion between the corrugated plate and the flat plate is partially changed, and the joining strength is partially changed. To produce a carrier for an exhaust gas purifying catalyst.
形成し該ハニカム体の外周に外筒を配置した後非酸化性
雰囲気下で加熱して少なくとも該波板と該平板を拡散接
合により一体化する排ガス浄化触媒用担体の製造方法に
おいて、 少なくとも該波板と該平板との接触部であって互いに接
触する２つの表面の少なくとも一方の面粗度を部分的に
変化させ接合強度を部分的に変化させるようにしたこと
を特徴とする排ガス浄化触媒用担体の製造方法。2. A corrugated plate and a flat plate are overlapped and wound to form a honeycomb body, and an outer cylinder is arranged on the outer periphery of the honeycomb body, and then heated in a non-oxidizing atmosphere to diffuse at least the corrugated plate and the flat plate. In a method for producing a carrier for an exhaust gas purifying catalyst, which is integrated by joining, at least one of two surfaces that are in contact with each other and are in contact with each other between the corrugated plate and the flat plate is partially changed to have a joining strength. The method for producing a carrier for an exhaust gas purifying catalyst, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1257540A JPH0822380B2 (en) | 1989-10-02 | 1989-10-02 | Method for manufacturing carrier for exhaust gas purification catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1257540A JPH0822380B2 (en) | 1989-10-02 | 1989-10-02 | Method for manufacturing carrier for exhaust gas purification catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03118839A JPH03118839A (en) | 1991-05-21 |
| JPH0822380B2 true JPH0822380B2 (en) | 1996-03-06 |
Family
ID=17307703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1257540A Expired - Lifetime JPH0822380B2 (en) | 1989-10-02 | 1989-10-02 | Method for manufacturing carrier for exhaust gas purification catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0822380B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998051410A1 (en) * | 1997-05-09 | 1998-11-19 | Nippon Steel Corporation | Exhaust gas cleaning catalyst metal honey comb element and its manufacture |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3816974B2 (en) * | 1995-10-04 | 2006-08-30 | 新日本製鐵株式会社 | Diffusion bonded metal carrier for catalyst having strong bonding strength and method for producing the same |
-
1989
- 1989-10-02 JP JP1257540A patent/JPH0822380B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998051410A1 (en) * | 1997-05-09 | 1998-11-19 | Nippon Steel Corporation | Exhaust gas cleaning catalyst metal honey comb element and its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03118839A (en) | 1991-05-21 |
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