JP3300225B2 - Stainless steel foil with excellent diffusion bonding properties and metal carrier using the same - Google Patents
Stainless steel foil with excellent diffusion bonding properties and metal carrier using the sameInfo
- Publication number
- JP3300225B2 JP3300225B2 JP09454896A JP9454896A JP3300225B2 JP 3300225 B2 JP3300225 B2 JP 3300225B2 JP 09454896 A JP09454896 A JP 09454896A JP 9454896 A JP9454896 A JP 9454896A JP 3300225 B2 JP3300225 B2 JP 3300225B2
- Authority
- JP
- Japan
- Prior art keywords
- foil
- stainless steel
- diffusion bonding
- steel foil
- honeycomb body
- 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
- 239000011888 foil Substances 0.000 title claims description 84
- 238000009792 diffusion process Methods 0.000 title claims description 38
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 37
- 239000010935 stainless steel Substances 0.000 title claims description 35
- 239000002184 metal Substances 0.000 title claims description 18
- 238000005096 rolling process Methods 0.000 claims description 22
- 238000000137 annealing Methods 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 7
- 230000003197 catalytic effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000001066 destructive effect Effects 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001648319 Toronia toru Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009658 destructive testing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000019621 digestibility Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
- Catalysts (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種内燃機関の排ガス
浄化用触媒コンバータのメタルハニカム体を製造する上
で、拡散接合性が優れた耐熱ステンレス箔、および該ス
テンレス箔を用いて製造するメタル担体に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant stainless steel foil having excellent diffusion bonding properties, and a metal manufactured using the stainless steel foil, for producing a metal honeycomb body for a catalytic converter for purifying exhaust gas of various internal combustion engines. It relates to a carrier.
【０００２】[0002]
【従来の技術】自動車、ボイラー、発電用の内燃機関の
排ガス浄化用触媒コンバータの担体には、耐熱ステンレ
ス製の外筒に、耐熱ステンレス製のハニカム体をインサ
ートしたメタル担体、あるいはセラミック製のハニカム
体をインサートしたセラミック担体が使用されている。
メタル担体はセラミック担体と比較して、エンジン始動
時の初期消化能に優れ、更には圧力損失も小さいという
特徴を有している。2. Description of the Related Art A carrier of a catalytic converter for purifying an exhaust gas of an internal combustion engine for automobiles, boilers, and power generation is a metal carrier having a heat-resistant stainless steel honeycomb body inserted into a heat-resistant stainless steel outer cylinder, or a ceramic honeycomb. A ceramic carrier with an inserted body is used.
The metal carrier is characterized by being superior in initial digestibility at the time of engine start and having a small pressure loss as compared with the ceramic carrier.
【０００３】従来のメタル担体において、ハニカム体
は、平箔（箔厚５０ミクロン程度のステンレス箔）と該
平箔をコルゲート加工した波箔とを重ね、渦巻状に巻き
とって製造されている。そして、該ハニカム体を該外筒
にインサートし、該平箔と該波箔を接合するとともに、
該ハニカム体と該外筒を接合してメタル担体とする。In a conventional metal carrier, a honeycomb body is manufactured by laminating a flat foil (a stainless steel foil having a foil thickness of about 50 microns) and a corrugated foil obtained by corrugating the flat foil, and winding the flat foil in a spiral shape. And, while inserting the honeycomb body into the outer cylinder, and joining the flat foil and the corrugated foil,
The honeycomb body and the outer cylinder are joined to form a metal carrier.
【０００４】ここで用いるステンレス箔とは、Ａｌを
０．５％〜８％含み、高温酸化雰囲気でアルミナ皮膜が
生成されて生地を防御する耐熱ステンレス箔を指す。Ａ
ｌ添加量の下限を０．５％としたのは、これ以上少ない
Ａｌ添加量では必要な厚さのアルミナ皮膜が形成されな
いことに起因する。そしてＡｌ添加量の上限を８％とし
たのは、これ以上多いＡｌ添加量では箔圧延が困難とな
り、工業的に意味が無くなるからである。[0004] The stainless steel foil used herein refers to a heat-resistant stainless steel foil containing 0.5% to 8% of Al and forming an alumina film in a high-temperature oxidizing atmosphere to protect the fabric. A
The reason why the lower limit of the addition amount of 1 is set to 0.5% is that an alumina coating of a required thickness is not formed with a smaller addition amount of Al. The reason why the upper limit of the amount of Al added is set to 8% is that if the amount of Al added is larger than this, foil rolling becomes difficult and has no industrial significance.
【０００５】ここでいう平箔と波箔の接合方法として、
ロウ付け、抵抗溶接、あるいは拡散接合等が用いられて
きている。なかでも拡散接合は、ロウ材等を用いること
なく、高温高真空下に保持することにより接合する方法
であり、生産性も高いため、メタル担体の製造コスト低
減に対し最適の方法と言える。この拡散接合によるメタ
ル担体の製造については、米国特許第４３００９５６号
明細書で示されている。[0005] The method of joining the flat foil and the corrugated foil here is as follows.
Brazing, resistance welding, diffusion bonding and the like have been used. Among them, diffusion bonding is a method of bonding by holding under high temperature and high vacuum without using a brazing material or the like. Since productivity is high, it can be said that diffusion bonding is an optimal method for reducing the production cost of a metal carrier. The production of a metal carrier by diffusion bonding is disclosed in U.S. Pat. No. 4,300,956.
【０００６】拡散接合は本来、被接合部の接触部が接合
する方法のため、平箔と波箔の接触部を確保することが
重要である。従来の拡散接合において、平箔と波箔の接
触を確保する方法として平箔と波箔間の接触面圧を高め
ることが言及されてきた。すなわち、ハニカム体の巻き
取り時に、平箔にバックテンションをかけて波箔ととも
に巻き取り軸の周りに巻回して、ハニカム体を硬く巻き
上げてきた。更にそうしてできたハニカム体を外筒に挿
入後、高真空下あるいは非酸化性雰囲気下で高温熱処理
しメタル担体を製作しようとした。しかし、ハニカム体
の拡散接合組み立てに計算上必要な値のバックテンショ
ンを負荷すると、平箔と波箔を巻き取る際に波箔が座屈
する、巻き取り軸が変形する、あるいはそのバックテン
ションが偏重することにより平箔が破断し、巻き取り不
能になるという問題が起きた。[0006] Diffusion bonding is essentially a method in which the contact portions of the portions to be joined are joined together, so it is important to ensure a contact portion between the flat foil and the corrugated foil. In conventional diffusion bonding, it has been mentioned that a contact surface pressure between the flat foil and the corrugated foil is increased as a method for securing the contact between the flat foil and the corrugated foil. That is, at the time of winding the honeycomb body, the flat foil is back-tensioned, wound around the winding axis together with the corrugated foil, and the honeycomb body is hardly wound. Further, after inserting the thus-formed honeycomb body into the outer cylinder, an attempt was made to produce a metal carrier by performing a high-temperature heat treatment under a high vacuum or a non-oxidizing atmosphere. However, when a back tension of a value required for the diffusion bonding assembly of the honeycomb body is applied, the corrugated foil buckles when the flat foil and corrugated foil are wound, the winding shaft is deformed, or the back tension is unbalanced. This causes a problem that the flat foil is broken and cannot be wound.
【０００７】そこで本発明者等は、特開平８−３８９１
２号公報に示す方法を考案した。この方法はステンレス
箔の表面を平滑にすることで拡散接合性を高め、低いバ
ックテンションで巻き取っても、ハニカム体が拡散接合
で組み立てることを可能ならしめるものである。ただ
し、ステンレス箔の表面を平滑に仕上げるために、箔圧
延の仕上げロールとしてブライト仕上げロールを用いる
等の特別な配慮が必要となり、これが箔圧延コストを引
き上げる要因になる。Therefore, the present inventors have disclosed in Japanese Patent Application Laid-Open No. 8-3891.
The method shown in Japanese Patent Publication No. 2 was devised. This method enhances the diffusion bonding property by smoothing the surface of the stainless steel foil, and enables the honeycomb body to be assembled by diffusion bonding even when wound with a low back tension. However, in order to finish the surface of the stainless steel foil smoothly, special considerations such as using a bright finishing roll as a finishing roll for the foil rolling are required, and this becomes a factor for raising the foil rolling cost.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、自動車、ボ
イラー、発電用等の各種内燃機関の排ガス浄化用触媒コ
ンバータのステンレス製メタルハニカム体を製造する上
で、ステンレス箔の平箔と該平箔をコルゲート加工して
得られた波箔の拡散接合が不安定になる問題を解決する
ものである。SUMMARY OF THE INVENTION The present invention relates to a method of manufacturing a stainless steel metal honeycomb body for a catalytic converter for purifying exhaust gas of various internal combustion engines for automobiles, boilers, power generation, and the like. An object of the present invention is to solve the problem that diffusion bonding of corrugated foil obtained by corrugating foil becomes unstable.
【０００９】[0009]
【課題を解決するための手段】すなわち本発明の要旨と
するところは、ハニカム体を構成するＡｌを０．５％〜
８％含む耐熱ステンレス箔において、最終焼鈍工程以後
の圧延による圧下率が８５％〜９９％の範囲内にあり、
箔厚方向の平均結晶粒サイズが０．００１ミクロン〜５
ミクロンの範囲にあることを特徴とする拡散接合性の優
れたステンレス箔であり、該ステンレス箔を用いて製造
することを特徴とするメタル担体である。That is, the gist of the present invention is that the Al constituting the honeycomb body is 0.5% or less.
In a heat-resistant stainless steel foil containing 8%, the rolling reduction by rolling after the final annealing step is in the range of 85% to 99%,
The average grain size in the foil thickness direction is 0.001 micron to 5
It is a stainless steel foil having excellent diffusion bonding properties, which is in the range of microns, and a metal carrier produced using the stainless steel foil.
【００１０】[0010]
【発明の実施の形態】触媒コンバータ用メタル担体で使
用されるメタルハニカム体を構成する厚さ数十ミクロン
のステンレス箔同士を拡散接合するとき、その拡散過程
において接合すべき素材の表面特性が大きく影響を与え
る。表面特性のうち、ミクロな接触状態を支配する表面
粗さに着目し、これを平滑化することで拡散接合性を向
上させたのが先述の本発明者らによる特開平８−８８９
１２号公報に開示している。引き続き詳細に探索した結
果、同じ表面粗さのステンレス箔でも拡散接合性の異な
るものが存在し、これがステンレス箔の最終焼鈍後の圧
延における圧下率と箔厚方向の平均結晶粒サイズによる
ものであることを見出した。DESCRIPTION OF THE PREFERRED EMBODIMENTS When stainless steel foils having a thickness of several tens of microns constituting a metal honeycomb body used in a metal carrier for a catalytic converter are diffusion bonded, the surface characteristics of the material to be bonded in the diffusion process are large. Affect. Of the surface characteristics, attention was paid to the surface roughness that governs the microscopic contact state, and the diffusion bonding property was improved by smoothing the surface roughness.
No. 12 discloses this. As a result of continued detailed search, there is also a difference in diffusion bonding property even in stainless steel foils having the same surface roughness, which is due to the rolling reduction after final annealing of the stainless steel foil and the average grain size in the foil thickness direction. I found that.
【００１１】このことについて以下詳細に述べる。ステ
ンレス箔を製造するとき、焼鈍過程を含む数回の圧延で
段階的に板厚を減じて行く。たとえば、板厚１mmの焼鈍
材が与えられて箔圧５０ミクロンまで仕上げるとき、粗
圧延で２５０ミクロンまで板厚を減じて、再焼鈍し、仕
上げ圧延で５０ミクロンまで板厚を減ずる。This will be described in detail below. When manufacturing stainless steel foil, the thickness is gradually reduced by rolling several times including an annealing process. For example, when annealed material having a thickness of 1 mm is provided and finished to a foil pressure of 50 microns, the thickness is reduced to 250 microns by rough rolling, reannealed, and reduced to 50 microns by finish rolling.
【００１２】このとき、圧延によって板は押しつぶさ
れ、箔厚方向の平均結晶粒サイズは小さくなり、結晶粒
内にも加工歪が蓄積される。ここでいう箔厚方向の平均
結晶粒サイズとは、箔長手方向に圧延された結晶が箔厚
方向に存在する個数（ｎ）を測定し、箔厚（ｔ）をｎで
除することで算出した。結晶粒界は粒内に比べて拡散係
数が大きいため、細粒ほど粒界が多数存在し、拡散現象
が速やかに進行する。更に、結晶粒内も加工歪が蓄積さ
れ内部欠陥が多いほど拡散現象が速やかに進行する。す
なわち、加工を加えるほど拡散接合性の優れた材料が得
られることになる。At this time, the sheet is crushed by rolling, the average crystal grain size in the foil thickness direction is reduced, and processing strain is accumulated in the crystal grains. The average grain size in the foil thickness direction here is calculated by measuring the number (n) of crystals rolled in the foil length direction existing in the foil thickness direction and dividing the foil thickness (t) by n. did. Since the crystal grain boundary has a larger diffusion coefficient than that in a grain, the finer the grain, the more grain boundaries exist, and the diffusion phenomenon proceeds rapidly. Further, as the processing strain is accumulated in the crystal grains and the number of internal defects increases, the diffusion phenomenon proceeds more rapidly. That is, the more the processing is performed, the more excellent the material having the diffusion bonding property is obtained.
【００１３】ただしこの効果が、圧延後焼鈍工程を加え
て再結晶させると失われてしまう。すなわち、触媒コン
バータ用ステンレス箔用素材として供される最終圧延に
おいて、如何に加工を加え箔厚方向に細粒化したか、そ
して加工歪を蓄積させ内部欠陥を多くしたかがポイント
となる。However, this effect is lost when recrystallization is performed by adding an annealing step after rolling. That is, in the final rolling used as the material for the stainless steel foil for the catalytic converter, the point is how the working is performed to reduce the grain size in the thickness direction of the foil, and the processing strain is accumulated to increase the internal defects.
【００１４】表１は、最終焼鈍工程後の圧下率と箔厚方
向の結晶粒サイズがステンレス箔の拡散接合性に与える
影響を示す。ここでは、Ａｌを５％含有したフェライト
系ステンレス箔を供試材料として用いた。拡散接合性
は、圧下率と平均結晶粒サイズをそれぞれ設定したステ
ンレス箔でハニカム体を作製し、これを破壊試験した結
果で判定した。良好な接合部が形成されたものを○、口
開きが発生したもの、およびテレスコープ状に破損した
ものを●で表記した。Table 1 shows the influence of the rolling reduction after the final annealing step and the crystal grain size in the foil thickness direction on the diffusion bonding property of the stainless steel foil. Here, a ferritic stainless steel foil containing 5% of Al was used as a test material. Diffusion bondability was determined based on the results of a destructive test of a honeycomb body made of a stainless steel foil having a reduction ratio and an average crystal grain size set respectively. Those with good joints formed were marked with ○, those with open mouth, and those with telescopic damage were marked with ●.
【００１５】[0015]
【表１】 [Table 1]
【００１６】図１は、破壊試験の方法を示す。本方法
は、ハニカム体の周囲をダイスで支え、中央をポンチ３
で加圧したときの破壊形態で判定するものである。尚、
ハニカム体の作製条件は以下の通りである。 平箔に８kgf のバックテンションをかけながら、波箔と
一緒に平箔を巻回し、外径９８．５mmのハニカム体を作
製した。そのハニカム体を外径１０２mmの外筒に挿入
し、縮径機にて外径１００mmに縮径した。その後、１０
-4torrの真空下で１２５０℃、９０min の真空熱処理を
実施することで拡散接合を遂行し、ハニカム体を作製し
た。表に見るように、最終焼鈍工程以後の圧延による圧
下率が８５％〜９９％の範囲内にあり、箔厚方向の平均
結晶粒サイズが０．００１ミクロン〜５ミクロンの範囲
にあるとき、良好な拡散接合メタル担体が得られた。FIG. 1 shows a method of a destructive test. In this method, the periphery of the honeycomb body is supported by a die, and the center is
The determination is made based on the destruction mode when the pressure is applied. still,
The manufacturing conditions of the honeycomb body are as follows. While applying a back tension of 8 kgf to the flat foil, the flat foil was wound together with the corrugated foil to produce a honeycomb body having an outer diameter of 98.5 mm. The honeycomb body was inserted into an outer cylinder having an outer diameter of 102 mm, and the diameter was reduced to 100 mm by a diameter reducing machine. Then 10
Diffusion bonding was performed by performing a vacuum heat treatment at 1250 ° C. for 90 minutes under a vacuum of −4 torr to produce a honeycomb body. As shown in the table, when the rolling reduction after the final annealing step is in the range of 85% to 99% and the average grain size in the foil thickness direction is in the range of 0.001 micron to 5 microns, it is good. An excellent diffusion bonded metal carrier was obtained.
【００１７】表２も、最終焼鈍工程後の圧下率と箔厚方
向の結晶粒サイズがステンレス箔の拡散接合性に与える
影響を示す。ただし表１の場合、ハニカム体作製の熱処
理条件が１２５０℃、９０min であったが、表２の場合
は、１２００℃、６０min であり、拡散接合条件として
は厳しいものであるが、工業的には生産性もよく、コス
トダウンが可能な熱処理となる。Table 2 also shows the effect of the rolling reduction after the final annealing step and the crystal grain size in the foil thickness direction on the diffusion bonding properties of the stainless steel foil. However, in the case of Table 1, the heat treatment conditions for manufacturing the honeycomb body were 1250 ° C. and 90 min, whereas in the case of Table 2, the heat treatment conditions were 1200 ° C. and 60 min. It is a heat treatment that has good productivity and can reduce costs.
【００１８】[0018]
【表２】 [Table 2]
【００１９】表に見るように、最終焼鈍工程以後の圧延
による圧下率が９０％〜９９％の範囲内にあるか、もし
くは箔厚方向の平均結晶粒サイズが０．００１ミクロン
〜２ミクロンの範囲にあるとき、拡散接合条件が厳しい
にも拘らず極めて良好な拡散接合メタル担体が得られ
た。ここで最終焼鈍過程後の圧下率を９９％以下とした
のは、そして箔厚方向の平均結晶粒サイズを０．００１
％以上としたのは、これらの要因が拡散接合性に与える
影響がそこで工業的に飽和するからである。尚、それぞ
れのステンレス箔表面粗さを測定したところ、平均粗さ
で概ね０．３０〜０．３５ミクロンであったため、表面
粗さによる拡散接合性への影響は同等と評価した。As shown in the table, the rolling reduction after rolling in the final annealing step is in the range of 90% to 99%, or the average grain size in the foil thickness direction is in the range of 0.001 to 2 microns. , A very good diffusion-bonded metal carrier was obtained despite the severe diffusion bonding conditions. The reason why the rolling reduction after the final annealing process was 99% or less was that the average grain size in the foil thickness direction was 0.001.
% Or more because the influence of these factors on the diffusion bonding property is industrially saturated there. In addition, when the surface roughness of each stainless steel foil was measured, the average roughness was approximately 0.30 to 0.35 μm, so that the influence of the surface roughness on the diffusion bonding property was evaluated to be equivalent.
【００２０】[0020]
【実施例】既存のステンレス箔を３種用意した。いずれ
もＣｒ添加量２０％である。 Ａ：圧下率７５％、平均結晶粒サイズ５ミクロン、Ａｌ
添加量７％ Ｂ：圧下率８０％、平均結晶粒サイズ５ミクロン、Ａｌ
添加量５％ Ｃ：圧下率８０％、平均結晶粒サイズ３ミクロン、Ａｌ
添加量３％ 更に、本発明によるステンレス箔を４種用意した。いず
れもＣｒ添加量２０％である。 Ｄ：圧下率８５％、平均結晶粒サイズ３ミクロン、Ａｌ
添加量７％ Ｅ：圧下率９５％、平均結晶粒サイズ３ミクロン、Ａｌ
添加量５％ Ｆ：圧下率８５％、平均結晶粒サイズ０．１ミクロン、
Ａｌ添加量３％ Ｇ：圧下率９５％、平均結晶粒サイズ０．１ミクロン、
Ａｌ添加量３％ 既存のフェライト系ステンレス箔Ａ，Ｂ，Ｃを用いて作
製したハニカム体は１２５０℃、９０min の拡散熱処理
条件でも破壊試験でテレスコープ状に破壊した。EXAMPLES Three kinds of existing stainless steel foils were prepared. In each case, the Cr content was 20%. A: Reduction rate 75%, average grain size 5 microns, Al
Addition amount 7% B: Reduction rate 80%, average grain size 5 microns, Al
Addition amount 5% C: rolling reduction 80%, average grain size 3 microns, Al
Addition amount 3% Further, four kinds of stainless steel foils according to the present invention were prepared. In each case, the Cr content was 20%. D: rolling reduction 85%, average grain size 3 microns, Al
Addition amount 7% E: Reduction rate 95%, average crystal grain size 3 microns, Al
Addition amount 5% F: reduction rate 85%, average grain size 0.1 micron,
Al addition amount 3% G: Reduction rate 95%, average grain size 0.1 micron,
The amount of Al added was 3%. The honeycomb body prepared using the existing ferrite-based stainless steel foils A, B, and C was broken in a telescope shape by a destructive test even at a diffusion heat treatment condition of 1250 ° C. and 90 minutes.
【００２１】本発明によるフェライト系ステンレス箔
Ｄ，Ｅ，Ｆ，Ｇを用いて作製したハニカム体は１２５０
℃、９０min の拡散熱処理条件で破壊試験に合格した。
特に、Ｅ，Ｆ，Ｇを用いて作製したハニカム体において
は、１２００℃、６０min の拡散熱処理条件でも破壊試
験に合格するという極めて良好な特性を示した。このよ
うに、既存のステンレス箔と本発明によるステンレス箔
の拡散接合性との差異は明確である。The honeycomb body manufactured using the ferritic stainless steel foils D, E, F, and G according to the present invention is 1250.
The specimen passed the destructive test under a diffusion heat treatment condition of 90 ° C. and 90 minutes.
In particular, the honeycomb body manufactured using E, F, and G exhibited extremely good characteristics of passing the destructive test even under the conditions of the diffusion heat treatment at 1200 ° C. for 60 minutes. Thus, the difference between the existing stainless steel foil and the diffusion bonding property of the stainless steel foil according to the present invention is clear.
【００２２】既存のステンレス箔Ａ，Ｂ，Ｃと本発明に
よるステンレス箔Ｄ，Ｅ，Ｆ，Ｇを用いて、１２５０
℃、９０min の熱処理条件でメタル担体Ａ，Ｂ，Ｃ，
Ｄ，Ｅ，Ｆ，Ｇを作製して、ガソリンエンジンの排気系
に搭載し、１サイクル：過熱９５０℃×８分＋冷却室温
×１０分の耐久試験を９００サイクル実施したところ、
Ａ，Ｂ，Ｃは１００サイクルでハニカム体が大きく破損
したが、Ｄ，Ｅ，Ｆ，Ｇは９００サイクル実施してもす
べて合格した。Using the existing stainless steel foils A, B and C and the stainless steel foils D, E, F and G according to the present invention, 1250
Under the heat treatment conditions of 90 ° C and 90 min, the metal supports A, B, C,
D, E, F, and G were prepared and mounted on the exhaust system of a gasoline engine, and one cycle: an endurance test of 950 ° C. for 8 minutes + cooling room temperature × 10 minutes was performed for 900 cycles.
In A, B, and C, the honeycomb body was greatly damaged in 100 cycles, but D, E, F, and G all passed even after 900 cycles.
【００２３】[0023]
【発明の効果】以上のように本発明によると、各種内燃
機関の排ガス浄化用触媒コンバータの担体に使用され
る、ハニカム体の平箔と波箔の拡散接合を良好に行うこ
とができる。As described above, according to the present invention, diffusion bonding of a flat foil and a corrugated foil of a honeycomb body used for a carrier of a catalytic converter for purifying exhaust gas of various internal combustion engines can be performed.
【図１】ハニカム体の破壊試験方法を示す図。FIG. 1 is a diagram showing a method for destructive testing of a honeycomb body.
１ ハニカム体 ２ ダイス ３ ポンチ DESCRIPTION OF SYMBOLS 1 Honeycomb body 2 Dice 3 Punch
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ０１Ｎ 3/28 ３０１ Ｂ２３Ｋ 20/00 ３１０Ｇ // Ｂ２３Ｋ 20/00 ３１０ ３１０Ｌ Ｂ０１Ｄ 53/36 ＺＡＢＣ (72)発明者 内海 徹 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 (56)参考文献 特開 平４−341522（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 38/00 - 38/60 B23K 20/00 310 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI F01N 3/28 301 B23K 20/00 310G // B23K 20/00 310 310L B01D 53/36 ZABC (72) Inventor Toru Utsumi Aichi 5-3 Tokaicho, Tokai-shi Nippon Steel Corporation Nagoya Works (56) References JP-A-4-341522 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C22C 38/00-38/60 B23K 20/00 310
Claims (4)
ス箔において、箔を製造する最終焼鈍工程以後で圧下率
８５％〜９９％の圧延がされ、箔厚方向の平均結晶粒サ
イズが０．００１ミクロン〜５ミクロンの範囲にあるこ
とを特徴とする拡散接合性の優れたステンレス箔。1. A heat-resistant stainless steel foil containing 0.5% to 8% of Al is rolled at a rolling reduction of 85% to 99% after the final annealing step of manufacturing the foil, and the average grain size in the foil thickness direction is reduced. A stainless steel foil having excellent diffusion bonding properties, which is in the range of 0.001 to 5 microns.
よる圧下率が９０％〜９９％の範囲内にあることを特徴
とする請求項１記載の拡散接合性の優れたステンレス
箔。2. The stainless steel foil having excellent diffusion bonding properties according to claim 1, wherein the rolling reduction after the final annealing step for manufacturing the foil is in the range of 90% to 99%.
００１ミクロン〜２ミクロンの範囲にあることを特徴と
する請求項１記載の拡散接合性の優れたステンレス箔。3. The foil has an average crystal grain size in the foil thickness direction of 0.3.
The stainless steel foil having excellent diffusion bonding properties according to claim 1, wherein the thickness is in a range of 001 to 2 microns.
拡散接合性の優れたステンレス箔を用いて製造すること
を特徴とするメタル担体。4. A metal carrier produced using the stainless steel foil having excellent diffusion bonding properties according to claim 1, 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09454896A JP3300225B2 (en) | 1996-04-16 | 1996-04-16 | Stainless steel foil with excellent diffusion bonding properties and metal carrier using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09454896A JP3300225B2 (en) | 1996-04-16 | 1996-04-16 | Stainless steel foil with excellent diffusion bonding properties and metal carrier using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09279310A JPH09279310A (en) | 1997-10-28 |
| JP3300225B2 true JP3300225B2 (en) | 2002-07-08 |
Family
ID=14113372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09454896A Expired - Fee Related JP3300225B2 (en) | 1996-04-16 | 1996-04-16 | Stainless steel foil with excellent diffusion bonding properties and metal carrier using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3300225B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170056007A (en) | 2014-09-17 | 2017-05-22 | 신닛테츠스미킨 카부시키카이샤 | Austenitic stainless steel plate |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102037653B1 (en) | 2013-05-15 | 2019-10-29 | 닛테츠 닛신 세이코 가부시키가이샤 | Process for producing stainless steel diffusion-joined product |
| JP2015066558A (en) * | 2013-09-27 | 2015-04-13 | 独立行政法人産業技術総合研究所 | Joint method for metallic component, and joint metal product |
| JP6129140B2 (en) | 2014-11-05 | 2017-05-17 | 日新製鋼株式会社 | Stainless steel for diffusion bonding |
| WO2020071534A1 (en) | 2018-10-04 | 2020-04-09 | 日本製鉄株式会社 | Austenitic stainless steel sheet and method for producing same |
-
1996
- 1996-04-16 JP JP09454896A patent/JP3300225B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170056007A (en) | 2014-09-17 | 2017-05-22 | 신닛테츠스미킨 카부시키카이샤 | Austenitic stainless steel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09279310A (en) | 1997-10-28 |
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