JP2524905B2 - Corrugation processing of metal carrier for automobile exhaust gas purification catalyst Manufacturing method of stainless steel foil - Google Patents
Corrugation processing of metal carrier for automobile exhaust gas purification catalyst Manufacturing method of stainless steel foilInfo
- Publication number
- JP2524905B2 JP2524905B2 JP3114824A JP11482491A JP2524905B2 JP 2524905 B2 JP2524905 B2 JP 2524905B2 JP 3114824 A JP3114824 A JP 3114824A JP 11482491 A JP11482491 A JP 11482491A JP 2524905 B2 JP2524905 B2 JP 2524905B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- foil
- exhaust gas
- metal carrier
- 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
- 239000011888 foil Substances 0.000 title claims description 104
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 58
- 239000010935 stainless steel Substances 0.000 title claims description 54
- 229910052751 metal Inorganic materials 0.000 title claims description 30
- 239000002184 metal Substances 0.000 title claims description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 239000003054 catalyst Substances 0.000 title claims description 23
- 238000000746 purification Methods 0.000 title claims description 13
- 238000005096 rolling process Methods 0.000 claims description 18
- 238000000137 annealing Methods 0.000 claims description 10
- 238000005097 cold rolling Methods 0.000 claims description 9
- 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 5
- 229910000967 As alloy 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
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 13
- 241000264877 Hippospongia communis Species 0.000 description 8
- 238000005336 cracking Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005482 strain hardening Methods 0.000 description 3
- 102220479482 Puromycin-sensitive aminopeptidase-like protein_C21D_mutation Human genes 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process 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
- 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
- 230000002301 combined effect Effects 0.000 description 1
- 239000000470 constituent Substances 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
- 230000007547 defect Effects 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
- 238000007670 refining 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)
- Heat Treatment Of Sheet Steel (AREA)
- Exhaust Gas After Treatment (AREA)
- Metal Rolling (AREA)
- Catalysts (AREA)
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 producing a corrugated stainless steel foil which is a constituent element of a metal carrier for a catalyst for an automobile exhaust gas purifying apparatus. More specifically, the present invention relates to a method for producing a stainless steel foil having excellent corrugation workability that does not cause problems 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。2. Description of the Related Art Conventionally, a ceramic honeycomb has been used as an automobile catalyst carrier. However, in recent years, it has been proposed to use an automobile catalyst carrier made of a metal honeycomb, which is superior to the ceramic honeycomb in terms of engine performance or mountability. In other words, this technology is a technology for forming an automobile catalyst carrier from a metal honeycomb in which flat foil (flat foil) made of stainless steel foil and corrugated foil (corrugated foil) are alternately wound and a metal outer cylinder surrounding these. There are, for example, Japanese Patent Laid-Open Nos. 50-92286 and 51-51
48473, 57-71898 and 58-1.
The specific technique is disclosed in each publication of 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。The manufacturing process of the metal honeycomb automobile catalyst carrier (hereinafter referred to as a metal carrier) is usually as follows. (1) The melted 20Cr-5Al stainless steel is hot-rolled, cold-rolled or the like to obtain a foil material having a thickness of about 50 μm. (2) A corrugated foil is produced by subjecting the foil material to corrugation processing. (3) Next, a honeycomb body in which flat foil and corrugated foil are alternately wound is formed and incorporated into an outer cylinder. (4) In order to bond 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 treatment is applied. (5) Further, a catalyst supporting process is performed. Among these processes, in the cold rolling process of stainless steel, due to the high work hardenability of stainless steel, it is usually subjected to intermediate annealing and the material is once softened to be rolled into a foil of about 50 μm. Since the stainless steel foil thus provided is corrugated in the next step, it is indispensable to sufficiently impart the corrugation property of the foil in the cold rolling process of stainless steel. .
【０００４】特開昭５６−１５２９６５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時に割れ、切断等の不具合が発生
しやすく箔の波付け加工性が十分に確保されないだけで
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。In Japanese Patent Laid-Open No. 56-152965, in order to facilitate corrugation (corrugation) of a ferritic stainless steel foil, the stainless steel foil after cold rolling is subjected to an annealing treatment. Although a method is disclosed, depending on the method of improving the ductility of the foil by annealing treatment , problems such as cracking and cutting occur during corrugation processing of the foil
Not only is it not easy to secure the corrugation workability of the foil, but this also increases the number of manufacturing processes, which in turn increases the manufacturing cost. I can not say.
【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。SUMMARY OF THE INVENTION The present invention improves the corrugation forming workability of a foil by a method different from the conventional method of improving the ductility of the foil by an annealing treatment and securing the corrugation workability. Another object of the present invention is to provide a method for producing a stainless steel foil for a metal carrier for an automobile exhaust gas purifying catalyst, which is excellent in corrugation workability and which simultaneously achieves simplification of the foil production 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。The present invention has been constructed as a result of examining the conditions of cold rolling for this purpose.
The main points are as follows. (1) Manufacturing the corrugated stainless steel foil of the metal carrier for automobile catalysts, which comprises a metal honeycomb in which flat foils made of stainless steel foil and corrugated foils are alternately wound and a metal outer cylinder surrounding these metal honeycombs At the same time, the total rolling reduction from the first pass to the final pass of the cold rolling after the final annealing is 75% or more, and the obtained stainless steel foil is corrugated while being rolled. Corrugated metal carrier for catalysts Manufacturing method of stainless steel foil.
【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：１０
〜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 of a metal carrier for an automobile exhaust gas purification catalyst according to the above item 1, wherein the stainless steel is a ferritic stainless steel. (3) The stainless steel contains Cr: 10 as an alloy component.
-40% by weight, Al: 1-10% by weight
A method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to claim 1.
【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 has rare earth elements Y and Ln (Lanthanoid: Ln is a mixture of La, Ce, Pr, and Nd) as alloy components, 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 0.01 to 1% by weight in total of one or more Ce. (5) The stainless steel contains Ti and N as alloy components.
The method for producing a corrugated stainless steel foil of a metal carrier for an automobile exhaust gas purification catalyst according to the above item 4, which contains 0.01 to 5% by weight in total of one or more of b, Ta, V, Zr and Hf. .
【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 metal carrier for an automobile exhaust gas purification catalyst according to any one of the above items 4 and 5, wherein the stainless steel contains 1 or 5% by weight of Mo or W as an alloy component in a total weight. For producing corrugated stainless steel foil.
【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。The method for producing a stainless steel foil of the present invention significantly corrugates the foil by subjecting the stainless steel foil, which has been strengthened by increasing the total reduction ratio of cold rolling, to the corrugation. It is a manufacturing method characterized by improving. The reasons for limiting the present invention will be described 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、箔を十分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 reasons for limiting the rolling conditions will be described. In the manufacturing process of stainless steel foil, if the total reduction ratio of cold rolling is increased and the foil is sufficiently work-hardened to increase its strength, the foil strength will be sufficiently secured against the tension applied to the foil material during corrugation processing. Therefore, the foil is not easily broken. However, when the total rolling reduction is low, or when the foil is annealed to give ductility to the foil, the strength of the foil is insufficient with respect to the tension applied during corrugation processing. Easily plastically deformed and ruptured,
Sufficient corrugation workability is not secured. That is, the total rolling reduction is not sufficiently high, or the annealed foil is insufficient in strength and easily leads to ductile fracture during corrugation.
In the present invention, when the total rolling reduction is less than 75%, the corrugation workability is not sufficiently secured.
【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 a method of imparting ductility by subjecting a foil to an annealing treatment, but increasing the total rolling reduction to 75% or more. Is a method of increasing the strength of The stainless steel used for the metal carrier 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 having 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, the components that can be added to the stainless steel as required and the action thereof will be described in detail. All chemical compositions are% by weight. Cr is a basic element that ensures the corrosion resistance and oxidation resistance of stainless steel.
In the present invention, if it is less than 10%, these properties are not sufficiently secured, while if it exceeds 40%, the toughness and ductility of the hot rolled sheet deteriorate. Therefore, the Cr component range is 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（Ｌａｎ
ｔｈａｎｏｉｄ：ただし、ＬｎはＬａ，Ｃｅ，Ｐｒ，Ｎ
ｄ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。In the present invention, Al is a basic element that ensures oxidation resistance. If it is less than 1%, the oxidation resistance is not sufficiently secured, while if it exceeds 10%, the toughness of the hot-rolled sheet decreases. Therefore, the Al content is 1% or more and 10% or less. Rare earth elements Y, Ln (Lan
thanoid: However, Ln is La, Ce, Pr, N
The mixture d), La, and Ce improve the oxidation resistance of the stainless steel, not only firmly adhere the stainless steel foil and the oxide film, but also significantly improve the life of the foil.
When one or more of Y, Ln, La, and Ce are contained in a total amount of less than 0.01% or more than 1%, these properties are not sufficiently ensured. Therefore,
The addition range is limited to 0.01% or more and 1% or less in total of one or more of Y, Ln, La and Ce.
【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 respectively form nitrides or carbides to reduce solid solution C and N, and precipitate on dislocations introduced during hot rolling of stainless steel. Improves the toughness of the hot-rolled sheet by refining the structure. At the same time, these elements improve the strength of the stainless steel by the combined effect of the solid solution strengthening action and the precipitation strengthening action by the above-mentioned precipitates. However, when the total amount of one or more of these elements is less than 0.01% or more than 5%, the effect is not sufficiently ensured, or saturated or lowered. 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 are less than 1%, this effect is not sufficiently secured. on the other hand,
When the total content exceeds 5%, this effect is saturated and the toughness of the hot-rolled sheet is significantly deteriorated. 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 described 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。(Embodiment 1) FIG. 1 shows 20Cr-5Al-
It is a graph which shows the work hardening characteristic of 0.1Ln-0.05Ti steel foil. The work hardening characteristics of the foil are shown by the relationship between the total rolling reduction and 0.2% proof stress, tensile strength, and elongation. Both 0.2% proof stress and tensile strength drastically increased until the total rolling reduction was around 40%, and gradually increased to around 75% when the rolling reduction was more than that, and the strength became remarkable again when the rolling reduction was further increased. To increase. On the other hand, the elongation drastically decreases to a reduction ratio of 20%, and at a further reduction ratio, the elongation becomes constant at about 1 to 2%. Therefore, it is understood that it is necessary to set the high pressure reduction rate in order to increase the strength of the foil. The target range of the present invention is a total reduction rate of 75.
% Or more.
【００２１】（実施例２）図２は２０Ｃｒ−５Ａｌ−
０．１Ｌｎ−０．０５Ｔｉ（Ｔｉ添加箔）鋼箔および２
０Ｃｒ−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。(Embodiment 2) FIG. 2 shows 20Cr-5Al-.
0.1Ln-0.05Ti (Ti-added foil) steel foil and 2
The relationship between the corrugation cracking susceptibility of 0Cr-5Al-0.4Ln-0.15Nb (Nb-added foil) steel foil (0.052 mm) and the tensile strength and bending resistance of the foil is shown. A foil with a total reduction of 74% breaks in a repeated bending test of 300 to 400 times, but a foil with a reduction of 87% or more breaks after about 600 times. The results of this repeated bending test show that cracking of the foil material is likely to occur in a low strength material and less likely to occur in a high strength material. Therefore, by increasing the total rolling reduction of the foil rolling to increase the strength of the foil, the folding resistance of the foil in the repeated bending test is improved, and the effect of suppressing the occurrence of foil breakage is increased, that is, the strength of the foil is increased. It can be seen that the 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−１．２
Ｔａ鋼および２０Ｃｒ−５Ａｌ−０．０４Ｌｎ−０．１
５Ｎｂ鋼を０．４ｍｍ厚で焼鈍処理を施した後、０．０
５２ｍｍまで圧延したもので、すなわち全圧下率を８７
％とすることにより引張強さをそれぞれ１２４ｋｇ／ｍ
ｍ2，１２７ｋｇ／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２０Ｃ
ｒ−５Ａｌ−０．０９Ｌｎ−１．７Ｗ鋼、２０Ｃｒ−５
Ａｌ−０．０６Ｌｎ−１．１Ｚｒ鋼および２０Ｃｒ−５
Ａｌ−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／ｍｍ2，１３２ｋｇ／ｍ
ｍ2，１２９ｋｇ／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２０
Ｃｒ−５Ａｌ−０．１１Ｌｎ−０．０５Ｔｉ鋼を０．２
ｍｍ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１１３
ｋｇ／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／ｍｉ
ｎ，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 results of the corrugation test of the material of the present invention and the comparative material. The material of the present invention (hereinafter referred to as strength-increasing foil) 1 is 20Cr-5A.
1-0.11Ln-0.05Ti steel was annealed to a thickness of 1 mm and then rolled to a thickness of 0.052 mm, that is, the total rolling reduction was 95%.
A high-strength foil of 1 kg / mm 2 was produced. Materials 2 to 4 of the present invention are 20Cr-5Al-0.09Ln-
2.5Mo steel, 20Cr-5Al-0.08Y-1.2
Ta steel and 20Cr-5Al-0.04Ln-0.1
After annealing 5Nb steel with a thickness of 0.4 mm, 0.0
It is rolled up to 52 mm, that is, the total rolling reduction is 87
% By setting the tensile strength to 124 kg / m
High strength foils of m 2 , 127 kg / mm 2 and 129 kg / mm 2 were produced. 20C of the present invention target materials 5 to 7
r-5Al-0.09Ln-1.7W steel, 20Cr-5
Al-0.06Ln-1.1Zr steel and 20Cr-5
The Al-0.06Ln-0.6V-0.2Hf steel has a value of 0.
Annealing treatment was performed at a thickness of 6 mm to give a total reduction of 91% and tensile strengths of 133 kg / mm 2 and 132 kg / m, respectively.
This is a high-strength foil of m 2 , 129 kg / mm 2 . On the other hand, the comparison material has the same composition as the material 1 of the present invention
Cr-5Al-0.11Ln-0.05Ti steel 0.2
After being annealed at a thickness of mm, it is rolled to 0.052 mm, that is, the total rolling reduction is 74% and the tensile strength is 113.
A foil of kg / mm 2 was produced. In the corrugation processing test, the corrugation processing speed was 3 m / min, 6 m / mi
It was carried out by variously changing to n, 8 m / min and 10 m / min. The corrugation workability was evaluated in three grades: ◯: no cracking, Δ: some cracking occurred, and x: no passing. As a result of the test, the strength-increasing foil of the present invention is 3 m / min to 10 m
The cracking did not occur in the foil at any corrugation processing speed of / min, and good corrugation workability was exhibited. On the other hand, the comparative material had some cracks in the foil even at a low corrugation processing speed of 3 m / min, and when the processing speed was further increased, sheet passing became impossible. Therefore, it can be seen that the corrugation workability of the foil is improved and the occurrence of cracks in the foil can be suppressed by increasing the total rolling reduction and increasing the strength of the foil.
【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。According to the present invention, it is possible to improve the corrugation workability of the foil by increasing the total reduction ratio of cold rolling to 75% or more to increase the strength of the stainless steel foil. It is possible to suppress the occurrence of defects such as cracks during corrugation processing. Furthermore, since the annealing step before corrugating the foil is unnecessary, it is possible to simplify the foil manufacturing process. Therefore, the method of increasing the strength of the stainless steel foil by increasing the total rolling reduction and sufficiently imparting the corrugation workability as in the present invention is suitable for the production of the corrugated steel foil of the metal carrier for the automobile exhaust gas purification catalyst. 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 work hardening characteristics of a 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 waving process cracking susceptibility and the foil tensile strength and crease resistance.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２１Ｄ 7/02 8821−4Ｋ Ｃ２１Ｄ 7/02 Ｅ Ｆ０１Ｎ 3/28 ３０１ Ｆ０１Ｎ 3/28 ３０１Ｚ (72)発明者 札軒 富美夫 山口県光市大字島田3434番地 新日本製 鐵株式会社光製鐵所内 (72)発明者 住友 秀彦 山口県光市大字島田3434番地 新日本製 鐵株式会社光製鐵所内 (72)発明者 太田 仁史 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─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location C21D 7/02 8821-4K C21D 7/02 E F01N 3/28 301 F01N 3/28 301Z (72) Inventor Fumio Fumio 3434 Shimada, Hikari City, Yamaguchi Prefecture, Nippon Steel Co., Ltd., Hikari Steel Works (72) Inventor Hidehiko Sumitomo, 3434 Shimada, Hikari City, Yamaguchi Prefecture, Hikari Steel Works, Ltd. (72) ) Inventor Hitoshi Ota 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Corporation Nagoya Steel Works
Claims (6)
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。1. A corrugated stainless steel foil of a metal carrier for automobile catalyst comprising a metal honeycomb in which a flat foil made of stainless steel foil and a corrugated foil are alternately wound, and a metal outer cylinder surrounding these. An automobile characterized by a total rolling reduction of 75% or more from the first pass to the final pass of cold rolling after final annealing, and corrugating the obtained stainless steel foil as it is rolled. A corrugated metal carrier for an exhaust gas purification catalyst, a method for producing a stainless steel foil.
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 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 of a metal carrier for an automobile exhaust gas purification catalyst according to claim 2, wherein r: 10 to 40% by weight and Al: 1 to 10% by weight.
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 comprises rare earth elements Y and Ln (Lanthanoid: Ln as alloy components).
Is a mixture of La, Ce, Pr and Nd), 1 of La and Ce
The method for producing a corrugated stainless steel foil for a metal carrier for an automobile exhaust gas purification catalyst according to claim 3, which contains 0.01 to 1% by weight in total of one kind or two or more kinds.
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 has T as an alloying component.
The corrugated stainless steel foil of a metal carrier for an automobile exhaust gas purification catalyst according to claim 4, which contains 0.01 to 5% by weight in total 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 is M 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 4, wherein the total weight of one or two of O and W is 1 to 5% by 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 JPH04341522A (en) | 1992-11-27 |
| JP2524905B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5012313B2 (en) * | 2007-08-17 | 2012-08-29 | Ｊｆｅスチール株式会社 | Alloy carrier and catalyst carrier for exhaust gas purifier |
-
1991
- 1991-05-20 JP JP3114824A patent/JP2524905B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04341522A (en) | 1992-11-27 |
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