JPH0459935B2 - - Google Patents
Info
- Publication number
- JPH0459935B2 JPH0459935B2 JP61114076A JP11407686A JPH0459935B2 JP H0459935 B2 JPH0459935 B2 JP H0459935B2 JP 61114076 A JP61114076 A JP 61114076A JP 11407686 A JP11407686 A JP 11407686A JP H0459935 B2 JPH0459935 B2 JP H0459935B2
- Authority
- JP
- Japan
- Prior art keywords
- flat plate
- carrier
- alloy
- brazing
- corrugated
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の排気ガスを浄化する触媒
コンバータの触媒担体の製造方法に係り、特に波
状板と平板とを重ねてロール状に成形したメタル
製の触媒担体の製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a catalyst carrier for a catalytic converter that purifies exhaust gas from an internal combustion engine, and particularly relates to a method for manufacturing a catalyst carrier for a catalytic converter that purifies exhaust gas from an internal combustion engine, and in particular, a process in which a corrugated plate and a flat plate are stacked and formed into a roll shape. The present invention relates to a method for manufacturing a metal catalyst carrier.
メタル製の触媒担体を用いた触媒コンバータの
従来技術としては、特開昭55−87815号公報に示
すものが知られている。
As a conventional technique of a catalytic converter using a metal catalyst carrier, the one shown in Japanese Patent Application Laid-open No. 87815/1983 is known.
第４図及び第５図は、この種従来の触媒担体を
示すもので、Fe−Cr−Al合金等の金属薄板（50μ
程度）からなる平板１と波板２とを重ね合わせ、
これをロール状に巻き、このロール状にしたもの
をシエル３内に挿入し、真空雰囲気中で高温加熱
することによりNi系のロウ材を用いて平板１と
波板２及びシエル３間を相互に固定する。 Figures 4 and 5 show this type of conventional catalyst carrier.
A flat plate 1 and a corrugated plate 2 made of
This is rolled into a roll, and this roll is inserted into the shell 3 and heated at high temperature in a vacuum atmosphere, thereby interconnecting the flat plate 1, corrugated plate 2, and shell 3 using Ni-based brazing material. Fixed to.
第４図は、この時のロウ付け状態を示し、４は
そのロウ付け部分である。 FIG. 4 shows the brazed state at this time, and 4 is the brazed portion.
上記のような触媒担体材料として用いられる
Fe−Cr−Al合金（代表的な成分としてFe−20Cr
−5Al）は、難加工性であるため歩留りが悪く、
又、ロールマージンも高いために材料コストが高
く、波板加工にも注意が必要であつた。更に、ロ
ール状に巻かれた平板１と波板２間の接着及びロ
ール体とシエル３間の接着にNi系のロウ材を用
いるため、そのロウ付け雰囲気温度は1200℃と高
温にする必要があり、ロウ付け時の熱エネルギコ
ストが高くなるほか、ロウ付け部が高温の排気ガ
スによつて酸化され易く、かつロウ付け部の劣化
が著しくなつて平板１、波板２及びシエル３間の
機械的接着強度が低下すると共に、Ni系ロウ材
は比較的高価であるため、製品のコストアツプを
招く問題があつた。
Used as catalyst support material as above
Fe-Cr-Al alloy (Fe-20Cr as a typical component)
-5Al) is difficult to process and has a low yield.
Furthermore, the material cost was high due to the high roll margin, and care had to be taken in processing the corrugated sheet. Furthermore, since Ni-based brazing material is used for adhesion between the rolled flat plate 1 and the corrugated sheet 2 and between the roll body and the shell 3, the brazing atmosphere temperature needs to be as high as 1200°C. In addition to increasing the thermal energy cost during brazing, the brazed part is easily oxidized by high-temperature exhaust gas, and the brazed part deteriorates significantly, causing damage between the flat plate 1, the corrugated plate 2, and the shell 3. In addition to a decrease in mechanical adhesive strength, the Ni-based brazing material is relatively expensive, leading to problems of increased product costs.
本発明は上記の問題点を解決するためになされ
たもので、ロウ付け温度の低減を図ると共に、耐
酸化性に優れ、かつ触媒担持のための担面生成を
容易にした、低コスト化の可能な触媒担体の製造
方法を提供することを目的とする。
The present invention has been made to solve the above problems, and is a low-cost method that reduces the brazing temperature, has excellent oxidation resistance, and facilitates the formation of a support surface for supporting a catalyst. The purpose of the present invention is to provide a method for producing a possible catalyst carrier.
本発明に係る触媒担体の製造方法は、担体素材
を形成するFe−Cr合金の平板及び波板の接着用
ロウ材に、Alを還元するのに充分な量のMgを含
むAl−Mg合金を使用し、このロウ材を上記平板
と波板間に介在して高真空雰囲気中で加熱するこ
とによりロウ付けすると共に、ロウ付け処理した
担体を大気中で熱処理して上記平板及び波板の表
面にAl拡散層を生成したものである。
In the method for producing a catalyst carrier according to the present invention, an Al-Mg alloy containing a sufficient amount of Mg to reduce Al is added to a brazing material for bonding Fe-Cr alloy flat plates and corrugated plates forming the carrier material. The brazing material is placed between the flat plate and the corrugated plate and heated in a high vacuum atmosphere to perform brazing, and the brazed carrier is heat-treated in the atmosphere to form the surfaces of the flat plate and the corrugated plate. In this case, an Al diffusion layer is formed.
本発明においては、Al−Mg合金からなるロウ
材が高真空雰囲気中で溶融加熱されると、ロウ材
中のMgがゲツタとして作用し、ロウ付け部周囲
のAl酸化膜を還元することになり、これにより
Al系ロウ材によるロウ付けを低温度で可能にし、
そしてロウ付け処理後の熱処理により、Fe−Cr
合金内部にAlを拡散させてFe−Cr−Al合金と同
等にAl2O3層の生成を容易にして、触媒担持のた
めの粗化及び耐熱、耐酸化性の向上を可能にす
る。
In the present invention, when a brazing material made of an Al-Mg alloy is melted and heated in a high vacuum atmosphere, the Mg in the brazing material acts as a getter and reduces the Al oxide film around the brazed part. , which results in
Enables brazing with Al-based brazing material at low temperatures,
Then, by heat treatment after brazing treatment, Fe-Cr
Diffusing Al into the alloy facilitates the formation of an Al 2 O 3 layer, similar to that of Fe-Cr-Al alloys, making it possible to roughen the alloy for catalyst support and improve heat resistance and oxidation resistance.
以下、本発明の実施例を図面に基づいて説明す
る。
Embodiments of the present invention will be described below based on the drawings.
第１図乃至第３図は本発明にかかる触媒担体の
製造方法の一実施例を示す成形過程の説明図であ
る。 FIGS. 1 to 3 are explanatory diagrams of a molding process showing an embodiment of the method for manufacturing a catalyst carrier according to the present invention.
この実施例においては、触媒担体を構成する平
板１０及び波板１１には、Fe−Cr合金からなる
薄板材（厚さ50μ程度）が使用され、これら平板
１０と波板１１との間Al−Mg合金からなるAl系
の箔状ロウ材１３（厚さ10μ程度）が挟持されて
いる。 In this embodiment, the flat plate 10 and the corrugated plate 11 constituting the catalyst carrier are made of a thin plate material (about 50 μm thick) made of Fe-Cr alloy, and the gap between the flat plate 10 and the corrugated plate 11 is Al- An Al-based brazing filler metal foil 13 (about 10 μm thick) made of an Mg alloy is sandwiched.
上記各素材を用いて触媒担体を成形する場合
は、まず、第１図に示すように、平板１０と波板
１１とをその間に箔状ロウ材１３を挾み込んで重
ね合わせ、この積層材を、その波板１１を内側に
してロール状に巻き込んで所望径の柱状担体に成
形する。 When forming a catalyst carrier using each of the above-mentioned materials, first, as shown in FIG. is rolled into a roll with the corrugated sheet 11 facing inside to form a columnar carrier of a desired diameter.
次に、上記柱状担体１４を円筒状等のシエル１
２内に挿入した後、ロウ材１３が溶融する温度
（660℃以上）の高真空雰囲気中（10-5Torr以下）
で加熱し、ロウ材１３を溶融し、これにより平板
１０と波板１１との接触部分及び平板１０とシエ
ル１２との接触部分を接着し、一体化する。 Next, the columnar carrier 14 is placed in a cylindrical shell 1.
2, in a high vacuum atmosphere (10 -5 Torr or less) at a temperature at which the brazing material 13 melts (660°C or higher).
The brazing material 13 is heated to melt the brazing material 13, thereby bonding and integrating the contact portion between the flat plate 10 and the corrugated sheet 11 and the contact portion between the flat plate 10 and the shell 12.
第２図は平板１０と波板１１とのロウ付け状態
を示し、溶融したロウ材１３は表面張力により波
板１１の山部と平板１０との接合隅部に集合して
両者の接合を強固にする。 Figure 2 shows the state of brazing between the flat plate 10 and the corrugated plate 11, where the molten brazing material 13 gathers at the corner of the joint between the peak of the corrugated plate 11 and the flat plate 10 due to surface tension, and strengthens the joint between the two. Make it.
この時、Al−Mg合金からなるロウ材１３中の
Mgはゲツタとして作用し、ロウ付け部周囲のAl
酸化膜を還元する。従つて、Al系ロウ材であつ
ても担体素材のロウ付けが完全になり、ロウ付け
部の耐酸化性も良くなる。しかも、Al系ロウ材
の溶融温度（660℃）がNi系ロウ材（1200℃）に
比して大幅に低いため、ロウ付け時の熱エネルギ
コストが大幅に低減され、触媒担体の製品コスト
も低減されることになる。 At this time, in the brazing material 13 made of Al-Mg alloy,
Mg acts as a getter, and the Al around the brazed part
Reduces oxide film. Therefore, even if it is an Al-based brazing material, the carrier material can be completely brazed and the oxidation resistance of the brazed portion can be improved. Furthermore, since the melting temperature of Al-based brazing material (660°C) is significantly lower than that of Ni-based brazing material (1200°C), the thermal energy cost during brazing is significantly reduced, and the product cost of the catalyst carrier is also reduced. It will be reduced.
上記ロウ材１３中に含有される還元のための
Mgの量は、１〜２重量％である。 For reduction contained in the brazing filler metal 13
The amount of Mg is 1-2% by weight.
次に、ロウ付けの終了した触媒担体を大気中で
600℃以上950℃以下（ウイスカ生成領域温度範
囲）の温度で１時間程度加熱する。すると、ロウ
材中のAlによつて平板１０及び波板１１の表面
に第３図に示す如くAl2O3（アルミナ）層１５と
Al拡散層１６が生成され、該Al2O3層１５の表面
はウイスカーが生成して粗面となつて白金等の排
気ガス浄化用触媒の担持を容易、かつ確実にし、
更にAl2O3層は、平板１０及び波板１１を耐高温
及び耐酸化に強い保護皮膜として作用する。 Next, the brazed catalyst carrier is placed in the atmosphere.
Heat at a temperature of 600°C or higher and 950°C or lower (whisker generation region temperature range) for about 1 hour. Then, due to the Al in the brazing material, an Al 2 O 3 (alumina) layer 15 is formed on the surfaces of the flat plate 10 and the corrugated plate 11 as shown in FIG.
An Al diffusion layer 16 is generated, and whiskers are generated on the surface of the Al 2 O 3 layer 15 to make it a rough surface, which facilitates and reliably supports an exhaust gas purifying catalyst such as platinum.
Further, the Al 2 O 3 layer acts as a protective coating for the flat plate 10 and the corrugated plate 11 that is resistant to high temperatures and oxidation.
なお、触媒担体は、平板１０及び波板１１を重
ね合わせてロール状に巻いた形状のものに限ら
ず、平板と波板を多数積層した構造のものでも良
いほか、平板と波板とを組み合わせ、ロウ付け及
び大気熱処理した後にシエルに挿着する方式とし
ても良い。 Note that the catalyst carrier is not limited to one in which the flat plate 10 and the corrugated plate 11 are stacked and wound into a roll, but may also be one in which a large number of flat plates and corrugated plates are laminated, or a structure in which a flat plate and a corrugated plate are combined. Alternatively, it may be inserted into the shell after being brazed and subjected to atmospheric heat treatment.
以上のように本発明によれば、触媒担体を構成
する耐熱性に劣るFe−Cr合金の平板及び波板の
ロウ材に、Alを還元するのに充分な量のMgを含
有するAl−Mg合金（ロウ材）を用いたので、ロ
ウ付け温度を低くでき、かつロウ付け部分の耐酸
化性を向上できると共に、製品の低コスト化が可
能になる。また、ロウ付け処理後に担体を大気中
で熱処理することにより、Al拡散でFe−Cr合金
を耐熱性が良く、しかも平板及び波板の表面に
Al2O3（ウイスカー）を生成するFe−Cr−Al合金
化したので、触媒担持のための粗面化が容易とな
り、かつ平板及び波板を耐高温及び耐酸化性のも
のにできる。
As described above, according to the present invention, Al-Mg containing a sufficient amount of Mg to reduce Al is added to the brazing material of the Fe-Cr alloy flat plate and corrugated plate, which constitute the catalyst carrier and have poor heat resistance. Since an alloy (brazing material) is used, the brazing temperature can be lowered, the oxidation resistance of the brazed portion can be improved, and the cost of the product can be reduced. In addition, by heat-treating the carrier in the atmosphere after brazing, the Fe-Cr alloy has good heat resistance due to Al diffusion, and it can be applied to the surface of flat plates and corrugated plates.
Since the Fe-Cr-Al alloy is used to generate Al 2 O 3 (whiskers), the surface can be easily roughened for catalyst support, and flat plates and corrugated plates can be made resistant to high temperatures and oxidation.
第１図は本発明に係る触媒担体の製造方法の一
例を示す説明図、第２図はその一部の拡大図、第
３図は同じく担体素材の説明用拡大断面図、第４
図は従来における触媒担体の端面図、第５図はそ
の一部を拡大して示す説明図である。
１０……平板、１１……波板、１２……シエ
ル、１３，１８……ロウ材、１４……柱状担体、
１５……Al2O3層、１６……Al拡散層、１７……
担体素材。
FIG. 1 is an explanatory view showing an example of the method for manufacturing a catalyst carrier according to the present invention, FIG. 2 is an enlarged view of a part thereof, FIG.
The figure is an end view of a conventional catalyst carrier, and FIG. 5 is an explanatory diagram showing an enlarged part of the carrier. 10... Flat plate, 11... Corrugated plate, 12... Shell, 13, 18... Brazing material, 14... Columnar carrier,
15... Al 2 O 3 layer, 16... Al diffusion layer, 17...
carrier material.
Claims (1)
波板の接着ロウ材に、Alを還元するのに充分な
量のMgを含むAl−Mg合金を使用し、このロウ
材を上記平板と波板間に介在して高真空雰囲気中
で加熱することによりロウ付けすると共に、ロウ
付け処理した担体を大気中で熱処理して上記平板
及び波板の表面にAl拡散層を生成することを特
徴とする触媒担体の製造方法。1. An Al-Mg alloy containing a sufficient amount of Mg to reduce Al is used as the brazing filler metal for bonding the Fe-Cr alloy flat plate and corrugated plate that form the carrier material, and this brazing filler metal is used to bond the flat plate and the corrugated plate of the Fe-Cr alloy that form the carrier material. The carrier is interposed between the plates and heated in a high vacuum atmosphere to perform brazing, and the brazed carrier is heat-treated in the atmosphere to generate an Al diffusion layer on the surface of the flat plate and corrugated plate. A method for producing a catalyst carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61114076A JPS62282644A (en) | 1986-05-19 | 1986-05-19 | Catalyst carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61114076A JPS62282644A (en) | 1986-05-19 | 1986-05-19 | Catalyst carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62282644A JPS62282644A (en) | 1987-12-08 |
| JPH0459935B2 true JPH0459935B2 (en) | 1992-09-24 |
Family
ID=14628446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61114076A Granted JPS62282644A (en) | 1986-05-19 | 1986-05-19 | Catalyst carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62282644A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616855B2 (en) * | 1988-07-22 | 1994-03-09 | 日本冶金工業株式会社 | Supported matrix for catalytic reactors |
| JPH02261550A (en) * | 1989-04-03 | 1990-10-24 | Nippon Steel Corp | High heat-resistant metallic carrier for automobile catalyst and its production |
| JP2784660B2 (en) * | 1989-04-13 | 1998-08-06 | 昭和飛行機工業株式会社 | Method of manufacturing carrier base for exhaust gas purification device |
| JP2627668B2 (en) * | 1989-08-04 | 1997-07-09 | 昭和飛行機工業株式会社 | Heat-resistant structure and manufacturing method thereof |
| EP0736677B1 (en) * | 1995-04-05 | 2002-08-07 | Nippon Steel Corporation | Process and apparatus for production of metallic honeycomb body for supporting a catalyst thereon |
| JP3350283B2 (en) * | 1995-04-05 | 2002-11-25 | 新日本製鐵株式会社 | Method for manufacturing honeycomb body |
| JP3122436B1 (en) | 1999-09-09 | 2001-01-09 | 三菱重工業株式会社 | Aluminum composite material, method for producing the same, and basket and cask using the same |
| US6617045B2 (en) | 2001-03-02 | 2003-09-09 | Nippon Steel Corporation | Metallic carrier, for automobile exhaust gas purification, made of thin metal foil and method of producing the same |
-
1986
- 1986-05-19 JP JP61114076A patent/JPS62282644A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62282644A (en) | 1987-12-08 |
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