JPH07113118A - Production of fe-cr-al alloy foil excellent in oxidation resistance - Google Patents
Production of fe-cr-al alloy foil excellent in oxidation resistanceInfo
- Publication number
- JPH07113118A JPH07113118A JP25571993A JP25571993A JPH07113118A JP H07113118 A JPH07113118 A JP H07113118A JP 25571993 A JP25571993 A JP 25571993A JP 25571993 A JP25571993 A JP 25571993A JP H07113118 A JPH07113118 A JP H07113118A
- Authority
- JP
- Japan
- Prior art keywords
- oxidation resistance
- alloy foil
- heat treatment
- alloy
- present
- 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.)
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- Heat Treatment Of Steel (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐酸化性に優れたＦｅ−
Ｃｒ−Ａｌ合金箔の製造方法に関する。FIELD OF THE INVENTION The present invention relates to Fe- which is excellent in oxidation resistance.
The present invention relates to a method for manufacturing a Cr-Al alloy foil.
【０００２】[0002]
【従来の技術】自動車、オートバイ等のエンジンより排
出される排気ガスの浄化のために、排ガス中のＮＯX ，
ＣＯ，ＨＣの３成分を同時に酸化還元して浄化する３元
触媒コンバーターが広く用いられている。初期の触媒コ
ンバーターはセラミック粒子の表面に酸化、還元触媒を
含浸させたペレットタイプであったが、現在は触媒反応
面積の増大、排ガス圧抵抗減少に有利なハニカムタイプ
となっている。このハニカム担体としてＦｅ−Ｃｒ−Ａ
ｌ系合金箔を用いた金属製のものが開発されている。こ
の金属製ハニカム担体は、板厚５０μｍ程度のＦｅ−Ｃ
ｒ−Ａｌ系合金等の耐酸化性合金箔を波付け加工した波
箔と平箔を交互に重ね合わせることによりハニカム形状
にしたものである。2. Description of the Related Art In order to purify exhaust gas emitted from engines of automobiles and motorcycles, NO x in exhaust gas,
A three-way catalytic converter is widely used that simultaneously purifies three components of CO and HC by redox reduction. The initial catalytic converter was a pellet type in which the surface of ceramic particles was impregnated with an oxidation / reduction catalyst, but now it is a honeycomb type, which is advantageous for increasing the catalytic reaction area and reducing the exhaust gas pressure resistance. Fe-Cr-A as this honeycomb carrier
Metallic products using l-based alloy foils have been developed. This metallic honeycomb carrier is made of Fe-C having a plate thickness of about 50 μm.
It is formed into a honeycomb shape by alternately superposing corrugated foils and flat foils obtained by corrugating an oxidation resistant alloy foil such as r-Al alloy.
【０００３】ところで、近年の自動車排ガス規制強化に
伴い自動車触媒コンバーターの分野では、コンバーター
を従来より高温位置に設置し、高温の排ガスを通過させ
ることにより触媒を従来より短時間で触媒活性化温度以
上に加熱し、触媒浄化効率を向上させることが検討され
ている。しかしながら、この様な使用環境はコンバータ
ー担体材料にとって過酷なものであり、優れた耐酸化性
が要求される。これに対し特開昭５６−９６７２６号、
特開昭５８−１７７４３７号などでは、Ｆｅ−Ｃｒ−Ａ
ｌ合金にＹやＲＥＭを添加して耐酸化性を改善した合金
を提案している。しかしながら、これら添加元素による
耐酸化性の改善のみでは、ますます過酷となるコンバー
ター使用環境においては耐酸化性が不足する場合があ
る。またＹやＲＥＭは高価であり多量に添加した材料を
一般の自動車に用いるのは経済性の点で困難であった。
更にこれらの元素を添加すると素材が非常に脆くなり、
製造性を劣化させるという問題も有していた。By the way, in the field of automobile catalytic converters due to the recent tightening of automobile exhaust gas regulations, the converter is installed at a higher temperature position than before and the hot exhaust gas is allowed to pass therethrough, whereby the catalyst is heated to a temperature higher than the catalyst activation temperature in a shorter time than before. It has been studied to improve the catalyst purification efficiency by heating to the above temperature. However, such a usage environment is severe for the converter carrier material, and excellent oxidation resistance is required. On the other hand, JP-A-56-96726,
In JP-A-58-177437 and the like, Fe-Cr-A is used.
An alloy having improved oxidation resistance is proposed by adding Y or REM to the 1-alloy. However, if only the oxidation resistance is improved by these additional elements, the oxidation resistance may be insufficient in the increasingly severe converter usage environment. In addition, Y and REM are expensive, and it is difficult to use a material added in a large amount in a general automobile in terms of economy.
Further addition of these elements makes the material very brittle,
It also had a problem of degrading manufacturability.
【０００４】[0004]
【発明が解決しようとする課題】従って、本発明は上述
した従来技術の欠点を解消し、耐酸化性の優れた自動
車、オートバイをはじめとするエンジンからの排ガス浄
化に用いられる触媒コンバーター用Ｆｅ−Ｃｒ−Ａｌ合
金箔を安定的に、かつ同組成の圧延ままの素材や通常の
焼鈍処理を施した素材より優れた耐酸化性を付与するＦ
ｅ−Ｃｒ−Ａｌ合金箔の製造方法を提供することを目的
とする。また、本発明の方法により製造されたＦｅ−Ｃ
ｒ−Ａｌ合金箔は、触媒コンバーター担体用途の他に高
温での耐酸化性が要求される電熱材等の耐熱材料として
も有効である。Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and Fe- for a catalytic converter used for purifying exhaust gas from engines such as automobiles and motorcycles having excellent oxidation resistance. F which gives Cr-Al alloy foil a stable and excellent oxidation resistance as compared with the as-rolled material having the same composition and the material subjected to the usual annealing treatment
It is an object to provide a method for manufacturing an e-Cr-Al alloy foil. In addition, Fe-C produced by the method of the present invention
The r-Al alloy foil is also effective as a heat resistant material such as an electric heating material which is required to have oxidation resistance at high temperatures, in addition to use as a catalyst converter carrier.
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明は、鋼
組成が重量％で、Ｃｒ：５〜３０％、Ａｌ：２〜８％、
希土類元素（ＲＥＭ）の一種以上：合計で０．０１〜
０．３％を含むＦｅ−Ｃｒ−Ａｌ合金箔を製造するにあ
たり、板厚０．２ｍｍ以下の箔に圧延した後、ガス中の
Ｏ2 分圧を１×１０2 Ｐａ以下かつＮ2 濃度を３０％以
下とした非酸化性ガス雰囲気中で、６００℃以上１１０
０℃以下の温度範囲で５ｓｅｃ以上の最終熱処理を行な
うことを特徴とする、耐酸化性に優れたＦｅ−Ｃｒ−Ａ
ｌ合金箔の製造方法を提供するものである。That is, according to the present invention, the steel composition is wt%, Cr: 5-30%, Al: 2-8%,
One or more rare earth elements (REM): 0.01 to total
In producing a Fe-Cr-Al alloy foil containing 0.3%, after rolling into a foil having a plate thickness of 0.2 mm or less, the O 2 partial pressure in the gas is 1 × 10 2 Pa or less and the N 2 concentration is In a non-oxidizing gas atmosphere of 30% or less, 600 ° C or more and 110
Fe-Cr-A excellent in oxidation resistance, characterized by performing a final heat treatment for 5 seconds or longer in a temperature range of 0 ° C or lower.
The present invention provides a method for producing an alloy foil.
【０００６】合金箔はさらに、Ｔｉ，Ｚｒ，Ｈｆ，Ｎｂ
およびＶより選ばれた少なくとも一種の元素を０．００
５〜０．３％含有しているのが好ましい。The alloy foil further includes Ti, Zr, Hf, Nb.
And at least one element selected from V is 0.00
It is preferable to contain 5 to 0.3%.
【０００７】[0007]
【作用】以下に本発明を更に詳細に説明する。本発明の
素材中のＣｒおよびＡｌは素材の耐酸化性および耐食性
を確保するための基本元素である。一般にＡｌを２．５
％以上含有するＦｅ−Ｃｒ−Ａｌ合金は高温に加熱され
た場合、Ａｌが優先酸化され緻密なＡｌ2 Ｏ3 皮膜を形
成し、これがＦｅ−Ｃｒ−Ａｌ合金の耐酸化特性を付与
するものとなる。本発明による製造方法を用いれば、よ
り少ないＡｌ含有量でＡｌ2 Ｏ3 皮膜を形成することが
可能となるが、安定的にＡｌ2 Ｏ3 皮膜を形成せしめる
ためには合金中にＣｒ，Ａｌ含有量は少なくともそれぞ
れ５％、２％以上必要である。一方、Ｃｒ含有量が３０
％、Ａｌ含有量が８％を越えると素材価格の上昇も招く
のみならず、熱延板の靱性および延性が低下するため通
常のステンレス鋼製造ラインで製造することが難しくな
り、コストアップを招く。したがって、Ｃｒの成分範囲
は５〜３０％、Ａｌの成分範囲は２〜８％に限定した。The present invention will be described in more detail below. Cr and Al in the material of the present invention are basic elements for ensuring the oxidation resistance and corrosion resistance of the material. Generally, Al is 2.5
Fe-Cr-Al alloy containing more than% when it is heated to a high temperature, and that Al is preferentially oxidized to form a dense Al 2 O 3 film, which imparts oxidation resistance of Fe-Cr-Al alloy Become. By using the production method according to the present invention, it is possible to form an Al 2 O 3 film with a smaller Al content, but in order to form an Al 2 O 3 film stably, Cr, Al and The contents must be at least 5% and 2% or more, respectively. On the other hand, the Cr content is 30
%, If the Al content exceeds 8%, not only will the material price rise, but the toughness and ductility of the hot-rolled sheet will decrease, making it difficult to produce it on a normal stainless steel production line, leading to an increase in cost. . Therefore, the Cr component range is limited to 5 to 30%, and the Al component range is limited to 2 to 8%.
【０００８】また、この種の耐酸化合金にＬａ，Ｃｅ，
Ｙなどの希土類元素を一種以上添加すると酸化皮膜の耐
剥離性が改善し、耐酸化性が向上する。この効果はＲＥ
Ｍの１種以上の合計添加量が０．０１％以上であらわれ
る。しかし、合計添加量が多くなると素材が脆くなり、
熱間圧延中に割れるなど製造性が著しく低下する。した
がってその合計含有量を０．０１％以上０．３％以下に
限定する。In addition, La, Ce,
Addition of one or more rare earth elements such as Y improves the peel resistance of the oxide film and improves the oxidation resistance. This effect is RE
It appears that the total addition amount of one or more kinds of M is 0.01% or more. However, the material becomes brittle when the total amount added increases,
Manufacturability is significantly reduced, such as cracking during hot rolling. Therefore, the total content is limited to 0.01% or more and 0.3% or less.
【０００９】以上のほかに、Ｔｉ，Ｚｒ，Ｈｆ，Ｎｂ，
Ｖなどの活性化元素はＣ，Ｎと炭室化物を形成すること
により合金中の固溶Ｃや粒界に析出して靱性低下の原因
となる（Ｆｅ，Ｃｒ）23Ｃ6 型炭化物を減少させるため
素材の靱性を改善する。さらにＺｒ，Ｈｆは耐酸化性を
改善する効果も有するため添加することができる。これ
らの元素の１種以上の添加効果は合計で０．００５％以
上の添加であらわれる。一方、合計添加量が多くなり、
過飽和に含まれるとこれら添加元素が合金中に固溶した
り、金属間化合物を形成するため靱性を低下させる。さ
らに過剰添加分が優先酸化物を形成するため耐酸化性も
低下する。これらの悪影響は０．３％超で顕著となる。
したがってその合計含有量を０．００５％〜０．３％に
限定する。In addition to the above, Ti, Zr, Hf, Nb,
Activating elements such as V decrease the toughness (Fe, Cr) 23 C 6 type carbides that form solid solution C in the alloy and precipitate in the grain boundaries by forming carbon chamber compounds with C and N. To improve the toughness of the material. Furthermore, Zr and Hf can be added because they also have the effect of improving the oxidation resistance. The effect of adding one or more of these elements appears in a total amount of 0.005% or more. On the other hand, the total amount added will increase,
When included in supersaturation, these additional elements form a solid solution in the alloy or form an intermetallic compound, which lowers the toughness. Furthermore, since the excessive addition forms a preferential oxide, the oxidation resistance also decreases. These adverse effects become remarkable at more than 0.3%.
Therefore, the total content is limited to 0.005% to 0.3%.
【００１０】ここでＦｅ−Ｃｒ−Ａｌ合金を排気ガス浄
化触媒コンバーター担体として用いる場合、板厚を薄く
することにより、コンバーターの小型軽量化、背圧減少
によるエンジン高出力化がはかれるなどメリットが大き
いため、通常０．２ｍｍ以下の箔として使用される。し
かしながら、その反面、箔とすると体積に対して表面積
が大きくなるため、高温長時間の酸化環境下で使用する
場合、箔中のＡｌの酸化消耗率が大きくなり、板厚が薄
いほど耐酸化性が低下してしまう。本発明の熱処理を施
すことにより、合金のＡｌ消耗を抑制し、耐酸化性が向
上するが、この効果は板厚の薄い素材に対して特に有効
である。したがって本発明の板厚の範囲を０．２ｍｍ以
下に限定する。When the Fe-Cr-Al alloy is used as the exhaust gas purifying catalytic converter carrier, the plate thickness is reduced to make the converter smaller and lighter, and the back pressure is reduced to achieve higher engine output, which is a great advantage. Therefore, it is usually used as a foil having a thickness of 0.2 mm or less. However, on the other hand, when the foil is used, the surface area is large with respect to the volume, so when used in an oxidizing environment at high temperature for a long time, the oxidation consumption rate of Al in the foil is large, and the thinner the plate, the more the oxidation resistance Will decrease. By performing the heat treatment of the present invention, Al consumption of the alloy is suppressed and the oxidation resistance is improved, but this effect is particularly effective for a material having a thin plate thickness. Therefore, the plate thickness range of the present invention is limited to 0.2 mm or less.
【００１１】これらの素材は圧延後に一般に、加工性を
付与するための軟化を目的として短時間の熱処理が施さ
れるが、本発明者らの研究によるとこの熱処理時のガス
雰囲気によって、その後の高温酸化特性が著しく変化す
ることが明らかになった。すなわち、６００℃以上１１
００℃以下の温度で、非酸化性ガス雰囲気中でＯ2 分圧
が１×１０2 Ｐａ以下の雰囲気中で熱処理すると、鋼板
の耐酸化性が著しく改善される。これはこれらの温度域
でＯ2 分圧が１×１０2 Ｐａ以下の低酸化性雰囲気中で
熱処理することにより鋼板表面に形成されるＡｌ2 Ｏ3
皮膜中のＡｌ，Ｃｒ，Ｆｅ含有量が変化し皮膜中のＡｌ
純度が高められ、この純度の高い緻密なＡｌ2 Ｏ3 表面
皮膜により箔の耐酸化性が向上するためと考えられる。
しかしながら、この様な低酸化性雰囲気下でＮ2 ガス濃
度が３０ｖｏｌ％を超えると、６００〜１１００℃の温
度域で表面酸化と同時に窒化も進行するようになり耐酸
化性を劣化させる。この悪影響はガス中のＮ2 ガス濃度
を３０％以下とすることにより抑制できる。よって雰囲
気ガス中のＮ2 濃度は３０％以下に限定する。ここで窒
素濃度を抑制するためには還元性のＨ2 ガス、Ｈｅ，Ａ
ｒ，Ｎｅ等の希ガスやＣＯ2 等の不活性ガスのいずれを
用いても有効であるが、Ｏ2 分圧を低下させるためには
還元性のＨ2 ガスを混合、あるいはＨ2 ガス単独とする
ことが望ましい。These materials are generally subjected to a short time heat treatment after rolling for the purpose of softening for imparting workability. However, according to the research conducted by the present inventors, the gas atmosphere at the time of the heat treatment causes a subsequent heat treatment. It was revealed that the high temperature oxidation characteristics changed significantly. That is, 600 ° C or higher 11
When heat-treated at a temperature of 00 ° C. or lower in an atmosphere of non-oxidizing gas and an O 2 partial pressure of 1 × 10 2 Pa or lower, the oxidation resistance of the steel sheet is remarkably improved. This is Al 2 O 3 formed on the surface of the steel sheet by heat treatment in a low oxidizing atmosphere with an O 2 partial pressure of 1 × 10 2 Pa or less in these temperature ranges.
The Al, Cr, Fe contents in the film change and the Al in the film changes.
It is considered that the purity is increased, and the oxidation resistance of the foil is improved by the dense and dense Al 2 O 3 surface coating.
However, when the N 2 gas concentration exceeds 30 vol% in such a low oxidizing atmosphere, surface oxidation and nitriding simultaneously proceed in the temperature range of 600 to 1100 ° C., which deteriorates the oxidation resistance. This adverse effect can be suppressed by setting the N 2 gas concentration in the gas to 30% or less. Therefore, the N 2 concentration in the atmosphere gas is limited to 30% or less. Here, in order to suppress the nitrogen concentration, reducing H 2 gas, He, A
It is effective to use a rare gas such as r or Ne or an inert gas such as CO 2 , but in order to reduce the O 2 partial pressure, a reducing H 2 gas is mixed or H 2 gas alone is used. Is desirable.
【００１２】ここで熱処理温度が６００℃より低いと、
長時間の処理を施しても耐酸化性向上に十分な表面皮膜
厚さが得られないためその下限を６００℃に限定する。
一方、１１００℃より高い温度での熱処理では、結晶粒
が粗大化し、曲げ加工時に粒界割れを生じる場合がある
ことに加え、表面酸化の進行速度が大きく制御が難しく
なり、安定的な耐酸化性を得ることが困難となるので、
その上限を１１００℃に限定する。また、６００℃から
１１００℃の温度域での熱処理保持時間が５ｓｅｃ未満
の場合、表面に形成される皮膜の厚さが不足し、十分な
耐酸化性改善効果が得られないことがあるため、これら
の温度範囲での熱処理保持時間は最低でも５ｓｅｃ以上
とする。If the heat treatment temperature is lower than 600 ° C.,
Even if the treatment is carried out for a long time, the surface coating thickness sufficient to improve the oxidation resistance cannot be obtained, so the lower limit is limited to 600 ° C.
On the other hand, when heat treatment is performed at a temperature higher than 1100 ° C., the crystal grains become coarse and grain boundary cracks may occur during bending, and the progress rate of surface oxidation becomes large, making it difficult to control, resulting in stable oxidation resistance. Because it becomes difficult to obtain sex,
The upper limit is limited to 1100 ° C. Further, when the heat treatment holding time in the temperature range of 600 ° C. to 1100 ° C. is less than 5 sec, the thickness of the film formed on the surface may be insufficient, and a sufficient effect of improving oxidation resistance may not be obtained. The heat treatment holding time in these temperature ranges is at least 5 sec or longer.
【００１３】[0013]
【実施例】以下に本発明を実施例に基づいて具体的に説
明する。 （実施例１）表１に実施例として用いた板厚５０μｍの
素材の化学組成を示す。いずれも１０ｋｇ高周波真空溶
解炉により溶製したインゴットを１２００℃に加熱後板
厚３ｍｍまで熱延し、その後焼鈍、脱スケール処理を行
なった後板厚５０〜１００μｍまでの圧延を施した。こ
の様にして作製した圧延ままの素材を表２に示すような
雰囲気、温度、および保持時間で熱処理を行なった。EXAMPLES The present invention will be specifically described below based on examples. (Example 1) Table 1 shows the chemical composition of the material having a plate thickness of 50 μm used as an example. In each case, an ingot melted by a 10 kg high-frequency vacuum melting furnace was heated to 1200 ° C., hot rolled to a plate thickness of 3 mm, annealed and descaled, and then rolled to a plate thickness of 50 to 100 μm. The as-rolled material thus produced was heat-treated in the atmosphere, temperature and holding time as shown in Table 2.
【００１４】熱処理した試料および比較のための圧延ま
まの素材よりそれぞれ幅２０ｍｍ、長さ３０ｍｍの試験
片を切りだし、１１５０℃の大気中で耐酸化性を調査し
た。ここで酸化試験は２４ｈ毎に試料を炉から取り出
し、重量を測定する方法を採用した。Test pieces each having a width of 20 mm and a length of 30 mm were cut out from the heat-treated sample and the as-rolled material for comparison, and the oxidation resistance was investigated in the atmosphere at 1150 ° C. Here, in the oxidation test, a method of taking out a sample from the furnace every 24 hours and measuring the weight was adopted.
【００１５】図１に２０％Ｃｒ−５％Ａｌ−０．１０％
Ｌａの組成の板厚５０μｍの箔の圧延ままおよび本発明
例１の条件で熱処理を施した試料の酸化試験結果を例と
して示す。同一組成の素材であっても本発明の熱処理を
施すことにより酸化による重量増加は大幅に抑制されて
おり、本発明の効果は明白である。ここで酸化による重
量増加が０．６ｍｇ／ｃｍ2 に達するまでの時間（Ｔ）
を図１より読み取ると、圧延ままの素材の場合（Ｔ１）
が２４ｈ程度であるのに対し、本発明の熱処理を施した
ものの場合（Ｔ２）は１００ｈにも延長されている。本
発明の発明の熱処理による耐酸化性の向上度を両者の比
（向上比＝Ｔ２／Ｔ１）で表すと４．２倍に達している
ことになる。In FIG. 1, 20% Cr-5% Al-0.10%
As an example, the oxidation test results of a sample of La having a composition of La and having a plate thickness of 50 μm and subjected to heat treatment under the conditions of Inventive Example 1 will be shown. Even if the materials have the same composition, the increase in weight due to oxidation is significantly suppressed by applying the heat treatment of the present invention, and the effect of the present invention is clear. Here, the time until the weight increase due to oxidation reaches 0.6 mg / cm 2 (T)
If you read from Fig. 1, in the case of as-rolled material (T1)
Is about 24 hours, whereas the heat-treated product of the present invention (T2) is extended to 100 hours. When the degree of improvement in oxidation resistance by the heat treatment of the present invention is expressed by the ratio of both (improvement ratio = T2 / T1), it reaches 4.2 times.
【００１６】表１に示す他の組成の箔についても種々の
熱処理を施し、耐酸化性を調査して同様に整理した。そ
の結果を表２中に示した。本発明の範囲の化学組成にあ
る試料に本発明の熱処理を施した本発明例１〜１０はい
ずれも熱処理材の耐酸化性が２倍以上に向上しており、
本発明の効果が明らかに認められる。Various heat treatments were also applied to the foils having other compositions shown in Table 1, and the oxidation resistance was investigated and the same arrangement was conducted. The results are shown in Table 2. In each of Examples 1 to 10 of the present invention in which the sample having the chemical composition within the range of the present invention was subjected to the heat treatment of the present invention, the oxidation resistance of the heat-treated material was improved more than twice.
The effect of the present invention is clearly recognized.
【００１７】それに対し、本発明の化学組成範囲にある
試料を用いても、熱処理雰囲気ガス中のＯ2 分圧が本発
明の範囲を超えている比較例１、２、およびＮ2 ガス濃
度が本発明の範囲を超えている比較例３は熱処理による
耐酸化性改善効果はほとんど見られていない。また、熱
処理雰囲気は本発明の範囲を満たすが熱処理温度が低い
比較例４、および熱処理保持時間が短い比較例５はいず
れも熱処理により十分な保護性皮膜が形成されておら
ず、耐酸化性は改善されなかった。更に合金中のＡｌ含
有量が本発明の規定範囲より少ない供試材９を熱処理し
た比較例６は、本発明の熱処理を施しても急激に酸化が
進行し高温耐酸化性が要求される用途には適さないこと
がわかる。On the other hand, even when the samples having the chemical composition range of the present invention were used, the O 2 partial pressure in the heat treatment atmosphere gas exceeded the range of the present invention, Comparative Examples 1 and 2, and the N 2 gas concentration was In Comparative Example 3 which exceeds the range of the present invention, the effect of improving the oxidation resistance by the heat treatment is hardly seen. Further, in Comparative Example 4 in which the heat treatment atmosphere satisfies the range of the present invention but the heat treatment temperature is low, and Comparative Example 5 in which the heat treatment retention time is short, a sufficient protective film is not formed by the heat treatment and the oxidation resistance is Not improved. Further, in Comparative Example 6 in which the sample material 9 whose Al content in the alloy is less than the specified range of the present invention is heat-treated, the oxidation rapidly progresses even when the heat treatment of the present invention is applied and high-temperature oxidation resistance is required. It turns out that it is not suitable for.
【００１８】（実施例２）次に実際のステンレス鋼製造
プロセスを用いて製造した箔帯について、光輝焼鈍ライ
ンを使用して本発明の熱処理による製造実験を行なっ
た。表３に実験に使用した箔帯の化学組成を、表４に熱
処理条件および耐酸化性評価結果を示す。工場製造ライ
ンにおいても本発明の熱処理を施すことにより、圧延ま
まの同組成の素材と比較して耐酸化性が著しく改善され
ることが明らかである。(Example 2) Next, a foil strip manufactured by an actual stainless steel manufacturing process was subjected to a manufacturing experiment by the heat treatment of the present invention using a bright annealing line. Table 3 shows the chemical composition of the foil strip used in the experiment, and Table 4 shows the heat treatment conditions and the evaluation results of oxidation resistance. It is apparent that the heat treatment of the present invention is applied to the factory production line to significantly improve the oxidation resistance as compared with the raw material having the same composition as rolled.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【表３】 [Table 3]
【００２２】[0022]
【表４】 [Table 4]
【００２３】[0023]
【発明の効果】本発明の製造方法によって製造されたＦ
ｅ−Ｃｒ−Ａｌ合金箔は従来の製法により製造した箔と
比較して、同組成であっても著しく優れた耐酸化特性
（耐酸化性向上比２以上）を安定的に付与することが可
能となった。これにより高温での耐酸化性が要求される
自動車、オートバイをはじめとする排ガス用メタル担体
として用いた場合、より長寿命化、高温での使用が可能
となり環境保全に対する役割は大きい。F produced by the production method of the present invention
The e-Cr-Al alloy foil is capable of stably imparting remarkably excellent oxidation resistance characteristics (oxidation resistance improvement ratio of 2 or more) even with the same composition as compared with the foil manufactured by the conventional manufacturing method. Became. As a result, when it is used as a metal carrier for exhaust gas such as automobiles and motorcycles that require oxidation resistance at high temperatures, it has a longer life and can be used at high temperatures, and thus has a great role for environmental protection.
【図１】 同一組成の素材について本発明の熱処理を施
したものと施さないものの耐酸化性の比較を示す図であ
る。FIG. 1 is a diagram showing a comparison of the oxidation resistance of materials having the same composition with and without the heat treatment of the present invention.
Claims (2)
ｌ：２〜８％、希土類元素（ＲＥＭ）の一種以上：合計
で０．０１〜０．３％を含むＦｅ−Ｃｒ−Ａｌ合金箔を
製造するにあたり、板厚０．２ｍｍ以下の箔に圧延した
後、ガス中のＯ2 分圧を１×１０2 Ｐａ以下かつＮ2 濃
度を３０％以下とした非酸化性ガス雰囲気中で、６００
℃以上１１００℃以下の温度範囲で５ｓｅｃ以上の最終
熱処理を行なうことを特徴とする、耐酸化性に優れたＦ
ｅ−Ｃｒ−Ａｌ合金箔の製造方法。1. A steel composition, by weight%, Cr: 5-30%, A
l: 2 to 8%, one or more rare earth elements (REM): in order to produce a Fe-Cr-Al alloy foil containing 0.01 to 0.3% in total, rolled into a foil having a thickness of 0.2 mm or less Then, in an atmosphere of non-oxidizing gas in which the O 2 partial pressure in the gas is 1 × 10 2 Pa or less and the N 2 concentration is 30% or less,
F excellent in oxidation resistance, characterized by performing a final heat treatment for 5 seconds or more in a temperature range of ℃ to 1100 ℃.
Method for manufacturing e-Cr-Al alloy foil.
およびＶより選ばれた少なくとも一種の元素を０．００
５〜０．３％含有する請求項１に記載の耐酸化性に優れ
たＦｅ−Ｃｒ−Ａｌ合金箔の製造方法。2. The alloy foil further comprises Ti, Zr, Hf, Nb.
And at least one element selected from V is 0.00
The manufacturing method of the Fe-Cr-Al alloy foil excellent in oxidation resistance according to claim 1, which contains 5 to 0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25571993A JPH07113118A (en) | 1993-10-13 | 1993-10-13 | Production of fe-cr-al alloy foil excellent in oxidation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25571993A JPH07113118A (en) | 1993-10-13 | 1993-10-13 | Production of fe-cr-al alloy foil excellent in oxidation resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07113118A true JPH07113118A (en) | 1995-05-02 |
Family
ID=17282703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25571993A Pending JPH07113118A (en) | 1993-10-13 | 1993-10-13 | Production of fe-cr-al alloy foil excellent in oxidation resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07113118A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068113A (en) * | 2008-10-24 | 2009-04-02 | Nippon Steel & Sumikin Stainless Steel Corp | Al-CONTAINING HEAT-RESISTANT FERRITIC STAINLESS STEEL SHEET WITH EXCELLENT WORKABILITY AND OXIDATION RESISTANCE, AND ITS MANUFACTURING METHOD |
| JP2009203513A (en) * | 2008-02-27 | 2009-09-10 | Jfe Steel Corp | Stainless steel foil easy to be etched, and method for producing the same |
| CN113174531A (en) * | 2021-03-31 | 2021-07-27 | 中北大学 | Medium-chromium type iron-chromium-aluminum alloy and production method thereof |
| CN115404413A (en) * | 2022-08-22 | 2022-11-29 | 北京首钢吉泰安新材料有限公司 | Iron-chromium-aluminum alloy, preparation method thereof and electric heating element |
-
1993
- 1993-10-13 JP JP25571993A patent/JPH07113118A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009203513A (en) * | 2008-02-27 | 2009-09-10 | Jfe Steel Corp | Stainless steel foil easy to be etched, and method for producing the same |
| JP2009068113A (en) * | 2008-10-24 | 2009-04-02 | Nippon Steel & Sumikin Stainless Steel Corp | Al-CONTAINING HEAT-RESISTANT FERRITIC STAINLESS STEEL SHEET WITH EXCELLENT WORKABILITY AND OXIDATION RESISTANCE, AND ITS MANUFACTURING METHOD |
| CN113174531A (en) * | 2021-03-31 | 2021-07-27 | 中北大学 | Medium-chromium type iron-chromium-aluminum alloy and production method thereof |
| CN115404413A (en) * | 2022-08-22 | 2022-11-29 | 北京首钢吉泰安新材料有限公司 | Iron-chromium-aluminum alloy, preparation method thereof and electric heating element |
| CN115404413B (en) * | 2022-08-22 | 2023-11-28 | 北京首钢吉泰安新材料有限公司 | Iron-chromium-aluminum alloy, preparation method thereof and electric heating element |
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