JPH04341522A - Production of corrugated stainless steel foil for metal support of catalyst for automobile exhaust gas cleanup - Google Patents
Production of corrugated stainless steel foil for metal support of catalyst for automobile exhaust gas cleanupInfo
- Publication number
- JPH04341522A JPH04341522A JP3114824A JP11482491A JPH04341522A JP H04341522 A JPH04341522 A JP H04341522A JP 3114824 A JP3114824 A JP 3114824A JP 11482491 A JP11482491 A JP 11482491A JP H04341522 A JPH04341522 A JP H04341522A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- foil
- corrugated
- steel foil
- exhaust gas
- 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
- 239000011888 foil Substances 0.000 title claims abstract description 105
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 64
- 239000010935 stainless steel Substances 0.000 title claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 239000003054 catalyst Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 27
- 230000009467 reduction Effects 0.000 claims abstract description 27
- 238000005097 cold rolling Methods 0.000 claims abstract description 12
- 238000000137 annealing Methods 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
- 238000000746 purification Methods 0.000 claims description 15
- 229910052684 Cerium Inorganic materials 0.000 claims description 7
- 229910052746 lanthanum Inorganic materials 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 229910000967 As alloy Inorganic materials 0.000 claims description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 3
- 150000002602 lanthanoids Chemical class 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 238000005336 cracking Methods 0.000 description 8
- 241000264877 Hippospongia communis Species 0.000 description 7
- 238000005452 bending Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000005482 strain hardening Methods 0.000 description 5
- 239000000969 carrier Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
-
- 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
- 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)
- Metal Rolling (AREA)
- Catalysts (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、自動車排ガス浄化装置
用の触媒用メタル担体の構成要素である波付け加工ステ
ンレス鋼箔の製造方法に関する。さらに詳しくは、箔に
波付け加工を施した場合においても箔割れ、箔切れ等の
不具合の生じない波付け加工性に優れたステンレス鋼箔
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing corrugated stainless steel foil, which is a component of a metal carrier for a catalyst used in an automobile exhaust gas purification device. More specifically, the present invention relates to a method for producing stainless steel foil that has excellent corrugation properties and does not cause defects such as foil cracking and foil breakage even when the foil is corrugated.
【０００２】0002
【従来の技術】従来、自動車触媒担体にはセラミックス
・ハニカムが用いられてきた。しかしながら、近年、エ
ンジン性能あるいは搭載性等の点でセラミックス・ハニ
カムよりも優れた性能を有するメタル・ハニカム製の自
動車触媒担体の使用が提案されている。すなわち、この
技術はステンレス鋼箔製の平らな箔（平箔）と波付け加
工した箔（波箔）を交互に巻き込んだ金属ハニカムとこ
れらを囲む金属外筒から自動車触媒担体を構成する技術
であり、例えば、特開昭５０−９２２８６号、同５１−
４８４７３号、同５７−７１８９８号および同５８−１
７７４３７号の各公報にその具体的技術が開示されてい
る。BACKGROUND OF THE INVENTION Conventionally, ceramic honeycombs have been used as automobile catalyst carriers. However, in recent years, it has been proposed to use an autocatalyst carrier made of metal honeycomb, which has better performance than ceramic honeycomb in terms of engine performance or mountability. In other words, this technology is a technology that constructs an autocatalyst carrier from a metal honeycomb made of stainless steel foil (flat foil) and corrugated foil (corrugated foil) that are alternately wrapped around it, and a metal outer cylinder that surrounds them. Yes, for example, JP-A-50-92286, JP-A-51-
No. 48473, No. 57-71898 and No. 58-1
Specific techniques thereof are disclosed in each publication of No. 77437.
【０００３】上記、メタル・ハニカム製自動車触媒担体
（以下、メタル担体と称す）の製造プロセスは、通常以
下のようである。（１）溶製した２０Ｃｒ−５Ａｌ系ス
テンレス鋼を熱間圧延、冷間圧延等により５０μｍ程度
の箔材にする。（２）箔材に波付け加工を施して波箔を
作製する。（３）次いで平箔と波箔を交互に巻き込んだ
ハニカム体を成形し外筒に組み込む。（４）平箔と波箔
間あるいは箔と外筒間を接合するため、ロー材を塗布し
た後、ロー付け処理を施す。（５）さらに触媒担持処理
を施す。これら各プロセスのうちステンレス鋼の冷間圧
延プロセスでは、ステンレス鋼の高い加工硬化性のゆえ
に、通常中間焼鈍を施し、素材を一旦軟化させる工程を
通して５０μｍ程度の箔に圧延される。このようにして
提供されたステンレス鋼箔は、次工程で波付け加工が施
されるため、ステンレス鋼の冷間圧延プロセスで箔の波
付け加工性を十分付与しておくことが必要不可欠である
。[0003] The manufacturing process of the metal honeycomb autocatalyst carrier (hereinafter referred to as metal carrier) is usually as follows. (1) Melted 20Cr-5Al stainless steel is hot-rolled, cold-rolled, etc. to form a foil material with a thickness of about 50 μm. (2) Corrugated foil is produced by corrugating the foil material. (3) Next, a honeycomb body in which flat foils and corrugated foils are alternately wound is formed and assembled into an outer cylinder. (4) In order to join between the flat foil and the corrugated foil or between the foil and the outer cylinder, a brazing material is applied and then a brazing process is performed. (5) Further, a catalyst supporting treatment is performed. Among these processes, in the stainless steel cold rolling process, due to the high work hardening properties of stainless steel, intermediate annealing is usually performed to soften the material and the material is rolled into a foil of approximately 50 μm. The stainless steel foil provided in this way will be corrugated in the next process, so it is essential that the foil be sufficiently corrugated in the stainless steel cold rolling process. .
【０００４】しかしながら、該ステンレス鋼箔は冷間圧
延により加工硬化しているため、箔の波付け加工時に割
れ、切断等の不具合が発生しやすく、波付け加工性を十
分確保するのは容易ではない。特開昭５６−１５２９６
５号公報では、フェライト系ステンレス鋼箔のコルゲー
ト加工（波付け加工）を容易にするために、冷間圧延終
了後のステンレス鋼箔にアニーリング（焼鈍）処理を施
す方法が開示されているが、焼鈍処理により箔の延性を
向上する方法によっては箔の波付け加工性が十分に改善
されないだけでなく、加えてこれにより製造工程が多く
なるため、ひいては製造コスト上昇を招くことより、箔
の波付け加工性向上策としては適切とは言えない。[0004] However, since the stainless steel foil is work-hardened by cold rolling, defects such as cracking and cutting are likely to occur during corrugation of the foil, and it is not easy to ensure sufficient corrugation workability. do not have. Japanese Patent Publication No. 56-15296
Publication No. 5 discloses a method of annealing stainless steel foil after cold rolling in order to facilitate corrugation processing (corrugating processing) of ferritic stainless steel foil. Depending on the method of improving the ductility of the foil through annealing treatment, not only the corrugation workability of the foil cannot be sufficiently improved, but also this increases the number of manufacturing steps, which in turn increases the manufacturing cost. This cannot be said to be appropriate as a measure to improve workability.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、従来の焼鈍
処理により箔の延性を向上させ波付け加工性を確保しよ
うとする方法とは異なる方法により、箔の波付け成形加
工性を向上させ、さらに箔製造工程の簡略化をも同時に
達成する波付け加工性に優れた自動車排ガス浄化触媒用
メタル担体用ステンレス鋼箔の製造方法を提供すること
を目的とする。[Problems to be Solved by the Invention] The present invention improves the corrugation processability of foil by a method different from the conventional method of improving the ductility of foil through annealing treatment and ensuring corrugation processability. Another object of the present invention is to provide a method for manufacturing a stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst, which has excellent corrugation workability and also simplifies the foil manufacturing process.
【０００６】[0006]
【課題を解決するための手段】本発明は、この目的のた
めに冷間圧延の条件を検討した結果構成されたもので、
その要旨とするところは以下のとおりである。
（１）ステンレス鋼箔製の平らな箔と波付け加工した箔
を交互に巻き込んだ金属ハニカムとこれらを囲む金属外
筒からなる自動車触媒用メタル担体の前記波付け加工し
たステンレス鋼箔を製造するに当り、最終焼鈍後の冷間
圧延の第一パスから最終パスまでの全圧下率を７５％以
上とし、得られたステンレス鋼箔を圧延ままで波付け加
工することを特徴とする自動車排ガス浄化触媒用メタル
担体の波付け加工ステンレス鋼箔の製造方法。[Means for Solving the Problems] The present invention was constructed as a result of studying cold rolling conditions for this purpose.
The main points are as follows. (1) Manufacturing the corrugated stainless steel foil of a metal carrier for an autocatalyst consisting of a metal honeycomb in which flat stainless steel foils and corrugated foils are alternately wound and a metal outer cylinder surrounding them. Automobile exhaust gas purification characterized in that the total rolling reduction from the first pass to the final pass of cold rolling after final annealing is 75% or more, and the obtained stainless steel foil is corrugated while still being rolled. A method for producing corrugated stainless steel foil for metal carriers for catalysts.
【０００７】（２） 前記ステンレス鋼はフェライト
系ステンレス鋼である前項１記載の自動車排ガス浄化触
媒用メタル担体の波付け加工ステンレス鋼箔の製造方法
。
（３） 前記ステンレス鋼は合金成分としてＣｒ：１
０〜４０重量％、Ａｌ：１〜１０重量％を含有する前項
２記載の自動車排ガス浄化触媒用メタル担体の波付け加
工ステンレス鋼箔の製造方法。(2) The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to item 1, wherein the stainless steel is a ferritic stainless steel. (3) The stainless steel has Cr:1 as an alloy component.
The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to the above item 2, which contains 0 to 40% by weight and Al: 1 to 10% by weight.
【０００８】（４） 前記ステンレス鋼は合金成分と
して希土類元素Ｙ、Ｌｎ（Ｌａｎｔｈａｎｏｉｄ：ただ
し、ＬｎはＬａ，Ｃｅ，Ｐｒ，Ｎｄの混合物），Ｌａ，
Ｃｅの１種または２種以上を総重量で０．０１〜１重量
％含有する前項３記載の自動車排ガス浄化触媒用メタル
担体の波付け加工ステンレス鋼箔の製造方法。
（５） 前記ステンレス鋼は合金成分としてＴｉ，Ｎ
ｂ，Ｔａ，Ｖ，Ｚｒ，Ｈｆの１種または２種以上を総重
量で０．０１〜５重量％含有する前項４記載の自動車排
ガス浄化触媒用メタル担体の波付け加工ステンレス鋼箔
の製造方法。(4) The stainless steel contains rare earth elements Y, Ln (Lanthanoid: where Ln is a mixture of La, Ce, Pr, and Nd), La,
The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to the above item 3, which contains one or more types of Ce in a total amount of 0.01 to 1% by weight. (5) The stainless steel contains Ti and N as alloy components.
The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to item 4 above, which contains one or more of Ta, V, Zr, and Hf at a total weight of 0.01 to 5% by weight. .
【０００９】（６） 前記ステンレル鋼は合金成分と
してＭｏ，Ｗの１種または２種を総重量で１〜５重量％
含有する前項４あるいは５のいずれかに記載の自動車排
ガス浄化触媒用メタル担体の波付け加工ステンレス鋼箔
の製造方法。(6) The above-mentioned stainless steel contains 1 to 5% by weight of one or both of Mo and W as alloy components.
A method for producing a corrugated stainless steel foil of a metal carrier for an automobile exhaust gas purification catalyst according to any one of the preceding clauses 4 or 5, which comprises:
【００１０】0010
【作用】本発明のステンレス鋼箔の製造方法は、冷間圧
延の全圧下率をアップして高強度化したステンレス鋼箔
を波付け加工に供することにより、箔の波付け加工性を
格段に向上させることを特徴とする製造方法である。本
発明の限定理由を以下に詳細に説明する。[Function] The method for manufacturing stainless steel foil of the present invention dramatically improves the corrugation processability of the foil by subjecting the stainless steel foil, which has been made high in strength by increasing the total reduction rate during cold rolling, to corrugation processing. This is a manufacturing method characterized by improving. The reasons for the limitations of the present invention will be explained in detail below.
【００１１】まず圧延条件の限定理由について説明する
。ステンレス鋼箔の製造プロセスにおいて、冷間圧延の
全圧下率を高め、箔を加工硬化させ高強度化すると、波
付け加工時に箔材に負荷される張力に対して箔の強度が
十分確保されるため、箔の破断は容易には生じない。
しかしながら、全圧下率が低いか、あるいは箔に焼鈍処
理を施して箔に延性を付与した場合には、波付け加工時
に負荷される張力に対して箔は強度が不足するため、ス
テンレス鋼箔は容易に塑性変形して破断に至り、波付け
加工性が十分に確保されない。すなわち、全圧下率が十
分に高くないか、あるいは焼鈍処理を施した箔は強度不
足のため波付け加工時に容易に延性破壊に至る。本発明
においては全圧下率が７５％未満の場合は、波付け加工
性が十分に確保されない。First, the reason for limiting the rolling conditions will be explained. In the manufacturing process of stainless steel foil, increasing the total reduction rate during cold rolling and work hardening the foil to increase its strength will ensure that the foil has sufficient strength to withstand the tension applied to the foil material during corrugation. Therefore, the foil does not break easily. However, if the total reduction rate is low or if the foil is annealed to give it ductility, the strength of the foil will not be strong enough to withstand the tension applied during corrugation. It is easily plastically deformed and breaks, and corrugation workability is not sufficiently ensured. That is, either the total rolling reduction is not high enough or the annealed foil is insufficient in strength, which easily leads to ductile fracture during corrugation. In the present invention, if the total rolling reduction is less than 75%, sufficient corrugation workability cannot be ensured.
【００１２】したがって、ステンレス鋼に良好な波付け
加工性を付与するのに有効な方法は、箔に焼鈍処理を施
して延性を付与する方法ではなく、全圧下率を７５％以
上に高めて箔を高強度化する方法である。メタル担体用
に用いられるステンレス鋼は、加熱・冷却の繰り返し熱
サイクルを受ける環境下で使用される。したがって、メ
タル担体用のステンレス鋼は熱膨張率の小さいフェライ
ト系ステンレス鋼であることが好ましい。Therefore, an effective method for imparting good corrugation workability to stainless steel is not to subject the foil to annealing treatment to impart ductility, but to increase the total rolling reduction to 75% or more. This is a method of increasing the strength of Stainless steel used for metal carriers is used in an environment that undergoes repeated thermal cycles of heating and cooling. Therefore, the stainless steel for the metal carrier is preferably a ferritic stainless steel with a small coefficient of thermal expansion.
【００１３】次に、ステンレス鋼に必要に応じて添加で
きる成分並びにその作用について詳しく説明する。なお
、化学組成はすべて重量％である。Ｃｒはステンレス鋼
の耐食性および耐酸化性を確保する基本元素である。
本発明においては、１０％未満ではこれらの特性が十分
に確保されず、一方４０％を超えて含有すると熱延板の
靱性および延性が低下する。したがって、Ｃｒの成分範
囲は１０％以上、４０％以下とする。Next, components that can be added to stainless steel as necessary and their effects will be explained in detail. Note that all chemical compositions are in weight percent. Cr is a basic element that ensures corrosion resistance and oxidation resistance of stainless steel. In the present invention, if the content is less than 10%, these properties cannot be sufficiently ensured, while if the content exceeds 40%, the toughness and ductility of the hot rolled sheet will decrease. Therefore, the range of Cr content is set to 10% or more and 40% or less.
【００１４】Ａｌは本発明においては耐酸化性を確保す
る基本元素である。１％未満では耐酸化性の確保が十分
でなく、一方１０％を超えて含有する場合には熱延板の
靱性が低下する。したがって、Ａｌの含有量は１％以上
、１０％以下とする。希土類元素のＹ，Ｌｎ（Ｌａｎｔ
ｈａｎｏｉｄ：ただし、ＬｎはＬａ，Ｃｅ，Ｐｒ，Ｎｄ
の混合物），Ｌａ，Ｃｅはステンレス鋼の耐酸化性を向
上させ、ステンレス鋼箔と酸化皮膜とを強固に密着させ
るだけでなく、箔としての寿命を著しく向上させる。
Ｙ，Ｌｎ，Ｌａ，Ｃｅの１種または２種以上が総量で０
．０１％未満の場合および１％を超えて含有する場合に
はこれらの性質が十分に確保されない。したがって、添
加範囲はＹ，Ｌｎ，Ｌａ，Ｃｅの１種または２種以上を
総量で０．０１％以上、１％以下に限定される。Al is a basic element that ensures oxidation resistance in the present invention. If the content is less than 1%, oxidation resistance is not sufficiently ensured, while if the content exceeds 10%, the toughness of the hot rolled sheet will decrease. Therefore, the Al content is set to 1% or more and 10% or less. Rare earth elements Y, Ln (Lant
hanoid: However, Ln is La, Ce, Pr, Nd
), La, and Ce not only improve the oxidation resistance of stainless steel and firmly adhere the stainless steel foil to the oxide film, but also significantly improve the service life of the foil. Total amount of one or more of Y, Ln, La, Ce is 0
．． If the content is less than 1% or more than 1%, these properties will not be sufficiently ensured. Therefore, the addition range of one or more of Y, Ln, La, and Ce is limited to a total amount of 0.01% or more and 1% or less.
【００１５】Ｔｉ，Ｎｂ，Ｔａ，Ｖ，Ｚｒ，Ｈｆはそれ
ぞれ窒化物あるいは炭化物を形成して固溶Ｃ，Ｎを減少
させるとともにステンレス鋼の熱間圧延中に導入される
転位上に析出して組織を微細化させ熱延板の靱性を向上
させる。同時にこれらの元素は固溶強化作用と上記析出
物による析出強化作用との複合効果によりステンレス鋼
の強度を向上させる。しかしながら、これら元素の１種
または２種以上を総量で０．０１％未満あるいは５％を
超えて含有する場合には、その効果が十分に確保されな
いか、あるいは飽和または低下する。したがって、添加
範囲は０．０１％以上、５％以下に限定される。Ti, Nb, Ta, V, Zr, and Hf each form nitrides or carbides to reduce solid solution C and N, and also precipitate on dislocations introduced during hot rolling of stainless steel. Refines the structure and improves the toughness of hot rolled sheets. At the same time, these elements improve the strength of stainless steel through the combined effect of solid solution strengthening and precipitation strengthening due to the precipitates. However, if one or more of these elements is contained in a total amount of less than 0.01% or more than 5%, the effect may not be sufficiently ensured, or may be saturated or reduced. Therefore, the addition range is limited to 0.01% or more and 5% or less.
【００１６】Ｍｏ，Ｗはステンレス鋼の強度を向上させ
る元素である。これらの元素の１種または２種が１％未
満の場合には、この効果が十分に確保されない。一方、
総量で５％を超えて含有する場合には、この効果が飽和
するとともに熱延板の靱性が著しく悪くなる。したがっ
て、添加範囲は１％以上、５％以下に限定される。Mo and W are elements that improve the strength of stainless steel. If one or two of these elements is less than 1%, this effect cannot be sufficiently ensured. on the other hand,
If the total content exceeds 5%, this effect will be saturated and the toughness of the hot rolled sheet will deteriorate significantly. Therefore, the addition range is limited to 1% or more and 5% or less.
【００１７】[0017]
【実施例】以下に、本発明の詳細を実施例で説明する。
表１および表２（表１のつづき）に実施例に用いた合金
の化学成分を示す。[Examples] The details of the present invention will be explained below with reference to Examples. Tables 1 and 2 (continued from Table 1) show the chemical components of the alloys used in the examples.
【００１８】[0018]
【表１】[Table 1]
【００１９】[0019]
【表２】[Table 2]
【００２０】（実施例１）図１は２０Ｃｒ−５Ａｌ−０
．１Ｌｎ−０．０５Ｔｉ鋼箔の加工硬化特性を示すグラ
フである。箔の加工硬化特性を全圧下率と０．２％耐力
、引張強さ、伸びとの関係で示している。０．２％耐力
、引張強さはともに全圧下率が４０％近傍まで急激に増
加し、それ以上の圧下率では７５％近傍まで緩慢に増加
し、さらに高圧下率にすると強度は再度顕著に増加する
。一方、伸びは圧下率が２０％まで急激に低下し、それ
以上の圧下率では伸びは約１〜２％で一定になる。した
がって、箔を高強度化するためには高圧下率にする必要
があることが分かる。本発明対象範囲は全圧下率７５％
以上である。(Example 1) FIG. 1 shows 20Cr-5Al-0
．． It is a graph showing the work hardening characteristics of 1Ln-0.05Ti steel foil. The work hardening characteristics of the foil are shown in terms of the relationship between the total rolling reduction, 0.2% proof stress, tensile strength, and elongation. Both the 0.2% proof stress and tensile strength increase rapidly until the total reduction rate approaches 40%, and at higher reduction rates, they increase slowly to around 75%, and when the reduction rate is further increased, the strength becomes noticeable again. To increase. On the other hand, the elongation rapidly decreases when the rolling reduction reaches 20%, and at higher rolling reductions, the elongation becomes constant at about 1 to 2%. Therefore, it can be seen that in order to increase the strength of the foil, it is necessary to use a high rolling reduction rate. The scope of the present invention is a total reduction rate of 75%.
That's all.
【００２１】（実施例２）図２は２０Ｃｒ−５Ａｌ−０
．１Ｌｎ−０．０５Ｔｉ（Ｔｉ添加箔）鋼箔および２０
Ｃｒ−５Ａｌ−０．４Ｌｎ−０．１５Ｎｂ（Ｎｂ添加箔
）鋼箔（０．０５２ｍｍ）の波付け加工割れ感受性と、
箔の引張強さおよび耐折れ強さの関係を示す。全圧下率
７４％の箔は３００〜４００回の繰り返し曲げ試験で破
断するが、圧下率８７％以上の箔は６００回程度で破断
する。この繰り返し曲げ試験結果は、箔材の割れは低強
度の材料で発生しやすく、高強度の材料では発生しにく
い傾向があることを示している。したがって、箔圧延の
全圧下率を高めて箔を高強度化することにより、繰り返
し曲げ試験における箔の耐折れ強さが向上し、箔破断発
生抑制効果が高くなること、すなわち箔を高強度化する
ことにより波付け加工性が改善されることが分かる。(Example 2) FIG. 2 shows 20Cr-5Al-0
．． 1Ln-0.05Ti (Ti-added foil) steel foil and 20
Corrugation cracking sensitivity of Cr-5Al-0.4Ln-0.15Nb (Nb-added foil) steel foil (0.052 mm) and
The relationship between the tensile strength and bending strength of foil is shown. Foil with a total rolling reduction of 74% will break after 300 to 400 repeated bending tests, while foil with a total rolling reduction of 87% or more will break after about 600 bending tests. The results of this repeated bending test indicate that cracks in foil materials tend to occur more easily in low-strength materials and less likely to occur in high-strength materials. Therefore, by increasing the total rolling reduction ratio in foil rolling to increase the strength of the foil, the bending resistance of the foil in repeated bending tests will be improved, and the effect of suppressing the occurrence of foil breakage will be increased. It can be seen that corrugation workability is improved by doing so.
【００２２】（実施例３）表３は本発明対象材および比
較材の波付け加工テスト結果を示している。本発明対象
材（以下、強度アップ箔と称す）１は、２０Ｃｒ−５Ａ
ｌ−０．１１Ｌｎ−０．０５Ｔｉ鋼を１ｍｍ厚で焼鈍処
理を施した後、０．０５２ｍｍまで圧延したもので、す
なわち全圧下率を９５％とすることにより引張強さ１４
１ｋｇ／ｍｍ２ の高強度箔を作製したものである。本
発明対象材２〜４は、２０Ｃｒ−５Ａｌ−０．０９Ｌｎ
−２．５Ｍｏ鋼、２０Ｃｒ−５Ａｌ−０．０８Ｙ−１．
２Ｔａ鋼および２０Ｃｒ−５Ａｌ−０．０４Ｌｎ−０．
１５Ｎｂ鋼を０．４ｍｍ厚で焼鈍処理を施した後、０．
０５２ｍｍまで圧延したもので、すなわち全圧下率を８
７％とすることにより引張強さをそれぞれ１２４ｋｇ／
ｍｍ２，１２７ｋｇ／ｍｍ２，１２９ｋｇ／ｍｍ２ の
高強度箔を作製したものである。本発明対象材５〜７の
２０Ｃｒ−５Ａｌ−０．０９Ｌｎ−１．７Ｗ鋼、２０Ｃ
ｒ−５Ａｌ−０．０６Ｌｎ−１．１Ｚｒ鋼および２０Ｃ
ｒ−５Ａｌ−０．０６Ｌｎ−０．６Ｖ−０．２Ｈｆ鋼は
、０．６ｍｍ厚で焼鈍処理を施して全圧下率を９１％と
し、引張強さをそれぞれ１３３ｋｇ／ｍｍ２，１３２ｋ
ｇ／ｍｍ２，１２９ｋｇ／ｍｍ２ の高強度箔を作製し
たものである。一方、比較材は本発明対象材１と同じ成
分の２０Ｃｒ−５Ａｌ−０．１１Ｌｎ−０．０５Ｔｉ鋼
を０．２ｍｍで焼鈍処理を施した後、０．０５２ｍｍま
で圧延し、すなわち全圧下率を７４％とし、引張強さを
１１３ｋｇ／ｍｍ２ の箔を作製したものである。波付
け加工テストは、波付け加工速度を３ｍ／ｍｉｎ，６ｍ
／ｍｉｎ，８ｍ／ｍｉｎ，１０ｍ／ｍｉｎと種々変化さ
せて行った。波付け加工性の評価は、○：割れなし、△
：割れ若干発生、×：通板不可の３段階で評価した。テ
ストの結果、本発明の強度アップ箔は３ｍ／ｍｉｎから
１０ｍ／ｍｉｎのいずれの波付け加工速度であっても箔
に割れは発生せず良好な波付け加工性を示した。一方、
比較材は波付け加工速度３ｍ／ｍｉｎの低速であっても
箔に割れが若干発生し、さらに加工速度をアップすると
通板が不可能になった。したがって、圧延の全圧下率を
アップして箔を高強度化することにより箔の波付け加工
性が向上し箔の割れ発生を抑制できることが分かる。(Example 3) Table 3 shows the corrugation test results for the materials subject to the present invention and comparative materials. The target material of the present invention (hereinafter referred to as strength-enhancing foil) 1 is 20Cr-5A
l-0.11Ln-0.05Ti steel is annealed to a thickness of 1 mm and then rolled to a thickness of 0.052 mm, that is, by setting the total rolling reduction to 95%, the tensile strength is 14.
A high-strength foil of 1 kg/mm2 was produced. Materials 2 to 4 targeted by the present invention are 20Cr-5Al-0.09Ln
-2.5Mo steel, 20Cr-5Al-0.08Y-1.
2Ta steel and 20Cr-5Al-0.04Ln-0.
After annealing 15Nb steel to a thickness of 0.4 mm,
It was rolled to 0.052 mm, that is, the total rolling reduction was 8.
By setting it to 7%, the tensile strength is 124 kg/
A high-strength foil of mm2, 127 kg/mm2, 129 kg/mm2 was produced. 20Cr-5Al-0.09Ln-1.7W steel, 20C of materials 5 to 7 subject to the present invention
r-5Al-0.06Ln-1.1Zr steel and 20C
The r-5Al-0.06Ln-0.6V-0.2Hf steel was annealed to a thickness of 0.6 mm, with a total reduction of 91%, and a tensile strength of 133 kg/mm2 and 132 k, respectively.
A high-strength foil with a weight of 129 kg/mm2 was produced. On the other hand, the comparative material was made by annealing 20Cr-5Al-0.11Ln-0.05Ti steel with the same composition as the material 1 of the present invention to a thickness of 0.2 mm, and then rolling it to a thickness of 0.052 mm. 74%, and the tensile strength was 113 kg/mm2. In the corrugation test, the corrugation speed was 3m/min, 6m.
/min, 8m/min, and 10m/min. Evaluation of corrugation workability: ○: No cracking, △
Evaluation was made on a three-level scale: : Slight cracking occurred, ×: Unthreadable. As a result of the test, the strength-enhancing foil of the present invention exhibited good corrugation workability without cracking at any corrugation speed from 3 m/min to 10 m/min. on the other hand,
In the comparative material, some cracking occurred in the foil even at a low corrugating speed of 3 m/min, and when the processing speed was further increased, threading became impossible. Therefore, it can be seen that by increasing the total rolling reduction rate and increasing the strength of the foil, the corrugation workability of the foil can be improved and the occurrence of cracks in the foil can be suppressed.
【００２３】[0023]
【表３】[Table 3]
【００２４】[0024]
【発明の効果】本発明によれば、冷間圧延の全圧下率を
７５％以上に高めてステンレス鋼箔を高強度化すること
により、箔の波付け加工性を向上させることが可能であ
り、波付け加工時の割れ等の不具合発生を抑制すること
ができる。さらに箔の波付け加工前の焼鈍工程が不必要
であることから箔製造工程を簡略化することが可能であ
る。したがって、本発明のように全圧下率の増大により
ステンレス鋼箔を高強度化し、波付け加工性を十分に付
与する方法は、自動車排ガス浄化触媒用メタル担体の波
付け加工鋼箔の製造に好適である。[Effects of the Invention] According to the present invention, it is possible to improve the corrugation workability of the foil by increasing the total rolling reduction rate of cold rolling to 75% or more and increasing the strength of the stainless steel foil. , it is possible to suppress the occurrence of defects such as cracks during corrugation processing. Furthermore, since an annealing step before corrugating the foil is unnecessary, the foil manufacturing process can be simplified. Therefore, the method of increasing the total rolling reduction to increase the strength of stainless steel foil and imparting sufficient corrugation workability as in the present invention is suitable for manufacturing corrugated steel foil for metal carriers for automobile exhaust gas purification catalysts. It is.
【図１】２０Ｃｒ−５Ａｌ鋼箔の加工硬化特性を示すグ
ラフである。FIG. 1 is a graph showing the work hardening characteristics of 20Cr-5Al steel foil.
【図２】箔波付け加工割れ感受性と、箔の引張強さおよ
び耐折れ強さの関係を示すグラフである。FIG. 2 is a graph showing the relationship between the foil corrugation cracking sensitivity and the tensile strength and bending strength of the foil.
Claims (6)
加工した箔を交互に巻き込んだ金属ハニカムとこれらを
囲む金属外筒からなる自動車触媒用メタル担体の前記波
付け加工したステンレス鋼箔を製造するに当り、最終焼
鈍後の冷間圧延の第一パスから最終パスまでの全圧下率
を７５％以上とし、得られたステンレス鋼箔を圧延まま
で波付け加工することを特徴とする自動車排ガス浄化触
媒用メタル担体の波付け加工ステンレス鋼箔の製造方法
。[Claim 1] The corrugated stainless steel foil of a metal carrier for an automobile catalyst is composed of a metal honeycomb in which flat stainless steel foils and corrugated foils are alternately wound, and a metal outer cylinder surrounding them. An automobile characterized in that, in manufacturing, the total rolling reduction from the first pass to the final pass of cold rolling after final annealing is 75% or more, and the obtained stainless steel foil is corrugated while being rolled. A method for producing corrugated stainless steel foil as a metal carrier for exhaust gas purification catalysts.
ンレス鋼である請求項１記載の自動車排ガス浄化触媒用
メタル担体の波付け加工ステンレス鋼箔の製造方法。2. The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to claim 1, wherein the stainless steel is a ferritic stainless steel.
ｒ：１０〜４０重量％、Ａｌ：１〜１０重量％を含有す
る請求項２記載の自動車排ガス浄化触媒用メタル担体の
波付け加工ステンレス鋼箔の製造方法。3. The stainless steel contains C as an alloy component.
The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to claim 2, which contains r: 10 to 40% by weight and Al: 1 to 10% by weight.
土類元素Ｙ、Ｌｎ（Ｌａｎｔｈａｎｏｉｄ：ただし、Ｌ
ｎはＬａ，Ｃｅ，Ｐｒ，Ｎｄの混合物），Ｌａ，Ｃｅの
１種または２種以上を総重量で０．０１〜１重量％含有
する請求項３記載の自動車排ガス浄化触媒用メタル担体
の波付け加工ステンレス鋼箔の製造方法。4. The stainless steel contains rare earth elements Y and Ln (Lanthanoid) as alloy components.
4. The metal carrier wave for an automobile exhaust gas purification catalyst according to claim 3, containing 0.01 to 1% by total weight of one or more of La, Ce, and n (n is a mixture of La, Ce, Pr, and Nd). A method for manufacturing coated stainless steel foil.
ｉ，Ｎｂ，Ｔａ，Ｖ，Ｚｒ，Ｈｆの１種または２種以上
を総重量で０．０１〜５重量％含有する請求項４記載の
自動車排ガス浄化触媒用メタル担体の波付け加工ステン
レス鋼箔の製造方法。5. The stainless steel contains T as an alloy component.
5. The corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to claim 4, which contains 0.01 to 5% by total weight of one or more of i, Nb, Ta, V, Zr, and Hf. manufacturing method.
ｏ，Ｗの１種または２種を総重量で１〜５重量％含有す
る請求項４あるいは５のいずれかに記載の自動車排ガス
浄化触媒用メタル担体の波付け加工ステンレス鋼箔の製
造方法。6. The stainless steel contains M as an alloy component.
6. The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to claim 4 or 5, which contains one or two of O and W in an amount of 1 to 5% by total weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3114824A JP2524905B2 (en) | 1991-05-20 | 1991-05-20 | Corrugation processing of metal carrier for automobile exhaust gas purification catalyst Manufacturing method of stainless steel foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3114824A JP2524905B2 (en) | 1991-05-20 | 1991-05-20 | Corrugation processing of metal carrier for automobile exhaust gas purification catalyst Manufacturing method of stainless steel foil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04341522A true JPH04341522A (en) | 1992-11-27 |
| JP2524905B2 JP2524905B2 (en) | 1996-08-14 |
Family
ID=14647608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3114824A Expired - Lifetime JP2524905B2 (en) | 1991-05-20 | 1991-05-20 | Corrugation processing of metal carrier for automobile exhaust gas purification catalyst Manufacturing method of stainless steel foil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2524905B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009046718A (en) * | 2007-08-17 | 2009-03-05 | Jfe Steel Kk | Alloy foil and catalyst carrier for exhaust gas purifying apparatus |
-
1991
- 1991-05-20 JP JP3114824A patent/JP2524905B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009046718A (en) * | 2007-08-17 | 2009-03-05 | Jfe Steel Kk | Alloy foil and catalyst carrier for exhaust gas purifying apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2524905B2 (en) | 1996-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101032126B1 (en) | STEEL SHEET HAVING HIGH Al CONTENT AND EXHIBITING EXCELLENT WORKABILITY AND METHOD FOR PRODUCTION THEREOF | |
| EP2811044B1 (en) | Ferritic stainless steel foil | |
| JP5561447B1 (en) | Stainless steel plate and stainless steel foil | |
| WO1993013235A1 (en) | High strength stainless steel foil for corrugation and method of making said foil | |
| JP5874873B1 (en) | Ferritic stainless steel foil and manufacturing method thereof | |
| JP6319537B1 (en) | Stainless steel plate and stainless steel foil | |
| JP3200160B2 (en) | Fe-Cr-Al alloy excellent in oxidation resistance and high-temperature embrittlement resistance, catalyst carrier using the same, and method for producing alloy foil | |
| JPH04341522A (en) | Production of corrugated stainless steel foil for metal support of catalyst for automobile exhaust gas cleanup | |
| JPH07268554A (en) | Ferritic stainless steel for automobile exhaust system excellent in formability and heat resistance | |
| JP3304747B2 (en) | Cold rolled steel sheet excellent in balance between bake hardenability, ductility and normal temperature aging, and method for producing the same | |
| JP3335647B2 (en) | Fe-Cr-Al alloy excellent in durability and catalyst carrier using the same | |
| JPS6342356A (en) | Fe-cr-high al alloy excellent in oxidation resistance and its production | |
| JP2885497B2 (en) | High-temperature, high-strength, high-heat-resistant Fe-Cr-Al engaging gold with excellent manufacturability | |
| JP3283286B2 (en) | Fe-Cr-Al alloy foil for highly heat-resistant metal carrier for automobile exhaust gas purification catalyst | |
| JPH07113118A (en) | Production of fe-cr-al alloy foil excellent in oxidation resistance | |
| JPH05277380A (en) | Fe-cr-al alloy foil for highly heat-resistant automobile exhaust gas purifying catalyst metal carrier | |
| JP4198448B2 (en) | Honeycomb structure for metal foil and catalyst carrier and metal catalyst carrier for exhaust gas purification | |
| JPH04116140A (en) | Heat resistant stainless foil for catalytic carrier for purifying combustion waste gas | |
| JPH08199244A (en) | Production of ferritic stainless steel sheet excellent in burring workability | |
| JPH04141558A (en) | Heat resistant stainless steel foil for catalyst carrier of automobile | |
| JP2002080944A (en) | EXTRA-THIN Fe-Cr-Al ALLOY FOIL AND ITS PRODUCTION METHOD | |
| JPH04128346A (en) | Stainless steel foil for metal support | |
| JPH0152449B2 (en) | ||
| JPH06248395A (en) | Ferritic stainless steel for automotive catalytic carrier excellent in oxidation resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960213 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090531 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090531 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100531 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110531 Year of fee payment: 15 |
|
| EXPY | Cancellation because of completion of term |