JP2000045032A - PRODUCTION OF Fe-Cr-Al ALLOY SHEET - Google Patents
PRODUCTION OF Fe-Cr-Al ALLOY SHEETInfo
- Publication number
- JP2000045032A JP2000045032A JP10212794A JP21279498A JP2000045032A JP 2000045032 A JP2000045032 A JP 2000045032A JP 10212794 A JP10212794 A JP 10212794A JP 21279498 A JP21279498 A JP 21279498A JP 2000045032 A JP2000045032 A JP 2000045032A
- Authority
- JP
- Japan
- Prior art keywords
- annealing
- rolling
- finish
- primary
- oxidation resistance
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、薄物のＦｅ−Ｃｒ
−Ａｌ合金板を製造する方法に関するもので、特に高温
環境下で優れた耐酸化性が要求される触媒コンバータ担
体等の素材としての極薄Ｆｅ−Ｃｒ−Ａｌ合金板を得る
のに好適な製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to thin Fe--Cr
The present invention relates to a method for producing an Al alloy plate, particularly suitable for obtaining an ultrathin Fe-Cr-Al alloy plate as a material for a catalytic converter carrier or the like which is required to have excellent oxidation resistance under a high temperature environment. About the method.
【０００２】[0002]
【従来の技術】Ｆｅ−Ｃｒ−Ａｌ合金、特に、２０Ｃｒ
−５Ａｌと通称されるＣｒ：１９〜２１ｗｔ％、Ａｌ：
５．５〜６．０ｗｔ％を含有する鉄基合金は、高温環境
下での耐酸化性に優れることから、自動車排ガス中の有
害物を除去する触媒コンバータの担持部材（触媒コンバ
ータ担体）用の素材として広く採用されている。この触
媒コンバータ担体は、反応表面積を稼ぐために極薄（３
０〜１００μｍ程度）の隔壁を多数もつハニカム（蜂の
巣）状に成形された構造品（ハニカム材）であり、その
素材としてのＦｅ−Ｃｒ−Ａｌ合金板についても板厚
０．０３〜０．１mm程度の極薄板に製造する必要があ
る。2. Description of the Related Art Fe--Cr--Al alloys, in particular, 20Cr
Cr: 19-21 wt%, commonly called -5Al, Al:
An iron-based alloy containing 5.5 to 6.0 wt% is excellent in oxidation resistance in a high-temperature environment, and is therefore used as a catalytic converter supporting member (catalytic converter carrier) for removing harmful substances in automobile exhaust gas. Widely used as a material. This catalytic converter carrier is extremely thin (3
This is a structural article (honeycomb material) formed into a honeycomb shape having a large number of partition walls (about 0 to 100 μm), and the thickness of the Fe—Cr—Al alloy plate as the material is 0.03 to 0.1 mm. It needs to be manufactured to an extremely thin plate.
【０００３】このような極薄のＦｅ−Ｃｒ−Ａｌ合金板
の製造は、冷間圧延による加工硬化等に鑑み、熱間圧延
材（熱延薄板）に対し、冷間圧延と軟化焼鈍とを複数
回，繰り返すことで段階的に板厚を落とし、最終の仕上
圧延で目標の板厚に圧延すると共に仕上焼鈍で製品とし
ての最終調整が行われる。[0003] In the production of such an ultra-thin Fe-Cr-Al alloy sheet, cold rolling and soft annealing are performed on a hot-rolled material (hot-rolled sheet) in view of work hardening caused by cold rolling. By repeating a plurality of times, the thickness is reduced step by step, and the final finish rolling is performed to roll to a target thickness and final annealing as a product is performed by finish annealing.
【０００４】従来の製造ライン工程では、例えば、熱間
圧延で厚さ２mmとした熱延薄板を０．０５mmの極薄板の
製品とする場合には、第１回目の圧延により板厚０．８
mmとし、第１回目の焼鈍・酸洗・表面研削等を順次行っ
た後、第２回目の圧延（中間圧延）により板厚０．３mm
（中間厚）とし、第２回目の焼鈍（中間焼鈍）後、第３
回目の圧延（仕上圧延）により板厚０．０５mmに仕上
げ、その後、仕上焼鈍を行う構成となっている。In a conventional production line process, for example, when a hot-rolled thin sheet having a thickness of 2 mm is formed into an extremely thin product of 0.05 mm by hot rolling, a sheet thickness of 0.8 mm is obtained by the first rolling.
mm, and after performing the first annealing, pickling, surface grinding, etc. in order, the second rolling (intermediate rolling) results in a thickness of 0.3 mm.
(Intermediate thickness), after the second annealing (intermediate annealing),
The sheet is finished to a thickness of 0.05 mm by the second rolling (finish rolling), and then subjected to finish annealing.
【０００５】ここで、上記中間圧延ないし仕上圧延での
圧下率は８５〜９０％程度が限界であるが、圧延回数の
削減等，生産性の見地等から圧下率を高めに設定するの
が一般的である。[0005] Here, the rolling reduction in the above-mentioned intermediate rolling or finish rolling is limited to about 85 to 90%, but it is general to set the rolling reduction higher from the viewpoint of productivity such as reduction of the number of rolling. It is a target.
【０００６】また、上記第１回目の焼鈍は大気雰囲気で
行い、焼鈍で生じた表面酸化物を次工程の酸洗・研削等
により除去するようにしているが、中間焼鈍および仕上
焼鈍については、無酸化雰囲気で行う光輝焼なまし（通
称ＢＡ）により行っている。これは、中間焼鈍や仕上焼
鈍の後に酸洗を行おうとすると第１回目の焼鈍時よりも
板長さが格段に延長していることから長大な設備を要
し、しかも、冷間圧延したままの最も滑らかである表面
を酸洗・研削等でダル化させることになるからである。[0006] The first annealing is performed in an air atmosphere, and surface oxides generated by the annealing are removed by pickling and grinding in the next step. It is performed by bright annealing (commonly known as BA) performed in a non-oxidizing atmosphere. This is because if the pickling is performed after intermediate annealing or finish annealing, the length of the plate is much longer than at the time of the first annealing, so long equipment is required. This is because the smoothest surface is dulled by pickling or grinding.
【０００７】ここで、上記光輝焼鈍（ＢＡ）の雰囲気ガ
スには、一般に、ＡＸガス（Ｈ2 ：７５VOL.％、Ｎ2 ：
２５VOL.％）や窒素ガス（Ｎ2 ：１００VOL.％）が使用
される。Here, the atmosphere gas of the bright annealing (BA) is generally AX gas (H 2 : 75 VOL.%, N 2 :
. 25 vol%) and nitrogen gas (N 2:. 100VOL%) is used.
【０００８】[0008]
【発明が解決しようとする課題】前述のように、Ｆｅ−
Ｃｒ−Ａｌ合金は高温環境下での耐酸化性に優れている
ことから触媒コンバータ担体等に使用されている。As described above, as described above, Fe-
Cr-Al alloys are used for catalytic converter carriers and the like because of their excellent oxidation resistance under high temperature environments.
【０００９】しかしながら、高温環境下での耐酸化性は
まだ十分ではなく、さらなる向上が望まれている。本発
明は、このような事情に鑑みてなされたもので、高温環
境下での耐酸化性に優れたＦｅ−Ｃｒ−Ａｌ合金板の製
造方法を提供することを課題とする。However, the oxidation resistance in a high-temperature environment is not yet sufficient, and further improvement is desired. The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a method for manufacturing an Fe—Cr—Al alloy plate having excellent oxidation resistance in a high-temperature environment.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
に、本発明のうち請求項１に記載した発明は、複数回の
冷間圧延及び焼鈍を繰り返して薄物のＦｅ−Ｃｒ−Ａｌ
合金板を製造するにあたり、上記複数の冷間圧延のうち
少なくとも仕上圧延での圧下率を３０〜５０％に設定す
ることを特徴とするＦｅ−Ｃｒ−Ａｌ合金板の製造方法
を提供するものである。Means for Solving the Problems In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides a thin Fe-Cr-Al film by repeating cold rolling and annealing a plurality of times.
The present invention provides a method for producing an Fe—Cr—Al alloy plate, wherein, in producing an alloy plate, at least a rolling reduction in finish rolling of the plurality of cold rollings is set to 30 to 50%. is there.
【００１１】次に、請求項２に記載した発明は、請求項
１に記載した構成に対し、上記複数の焼鈍のうち少なく
も仕上焼鈍での雰囲気ガスを、Ｎ2 ガス及び不可避的不
純物から構成することを特徴とするものである。Next, the invention according to claim 2 is different from the structure according to claim 1 in that the atmosphere gas in at least the finish annealing of the plurality of annealings is composed of N 2 gas and unavoidable impurities. It is characterized by doing.
【００１２】以下、本発明の作用について述べる。本発
明者は、上記課題を解決するために、鋭意検討を行った
ところ、高熱環境下での耐酸化性と圧下率との関係につ
いて図１に示す結果が得られた。これは、圧下率を変え
てＦｅ−Ｃｒ−Ａｌ合金板を仕上圧延した後に、ＡＸガ
ス（Ｈ2 ：７５VOL.％、Ｎ2 ：２５VOL.％）又は窒素ガ
ス（Ｎ2 ：１００VOL.％）雰囲気で仕上焼鈍を行い、得
られた試験片の耐酸化性について調査したものである。
図１中、○印は、ＡＸガス雰囲気で焼鈍したものであ
り、●印は、窒素ガス雰囲気で焼鈍したものである。The operation of the present invention will be described below. The present inventor has conducted intensive studies in order to solve the above-described problems, and as a result, the results shown in FIG. 1 are obtained as to the relationship between the oxidation resistance and the rolling reduction under a high heat environment. This, after finish rolling the Fe-Cr-Al alloy plate by changing the reduction ratio, AX gas (H 2:. 75VOL%, N 2:. 25VOL%) or nitrogen gas (N 2:. 100VOL%) Atmosphere The sample was subjected to finish annealing to examine the oxidation resistance of the obtained test piece.
In FIG. 1, the mark ○ indicates annealing in an AX gas atmosphere, and the mark ● indicates annealing in a nitrogen gas atmosphere.
【００１３】図１における、縦軸の評価時間ｔ0 は、仕
上焼鈍後の試験片についての耐酸化性の度合を表す値で
あり、ｔ0 の値が大きいほど耐酸化性が良好であること
を表している。In FIG. 1, the evaluation time t 0 on the vertical axis is a value representing the degree of oxidation resistance of the test piece after the finish annealing, and the larger the value of t 0 , the better the oxidation resistance. Is represented.
【００１４】ここで、上記耐酸化性を評価する評価時間
ｔ0 は、次のように測定して求めたものである。すなわ
ち、１１００℃の大気雰囲気（高熱環境下）に、対象と
する試験片を放置し、時間経過に伴い酸化により増加し
た酸化増量を順次，測定して、図２に示すように、酸化
増量の増分値が急激に大きくなった時の時間を上記評価
時間ｔ0 としたものである。そして、上記評価時間ｔ0
の値が大きいほど、高温環境下で所定の酸化増量となる
時間（酸化増量の増量速度が小さい時間）が長いことを
示し、従って、評価時間ｔ0 は、高温環境下での耐酸化
性の度合を評価するための優れた指標となることが分か
る。Here, the evaluation time t 0 for evaluating the oxidation resistance is obtained by measuring as follows. That is, the target test piece was left in an air atmosphere at 1100 ° C. (under a high heat environment), and the oxidation increase increased by the oxidation over time was sequentially measured. As shown in FIG. the time when the increment value has become rapidly increases is obtained by the above evaluation time t 0. Then, the evaluation time t 0
The larger the value is, the longer the time required for the oxidation to increase in the high temperature environment (the time during which the rate of the increase in the oxidation weight is low) is longer. Therefore, the evaluation time t 0 is determined by the oxidation resistance in the high temperature environment. It turns out to be an excellent index for evaluating the degree.
【００１５】なお、上記評価時間ｔ0 を境に急激に酸化
増量が増加するのは、Ｆｅ−Ｃｒ−Ａｌ合金板は、まず
主にＡｌが酸化し、その後にＦｅが酸化すると考えら
れ、合金中のＡｌが酸化しているうちは酸化増量の増量
速度が低いが、Ａｌが酸化し尽くすとＦｅが酸化するた
め、酸化増量の増量速度が急激に速くなると考えられ
る。従って、上記評価時間ｔ0 は、合金中のＡｌが酸化
し尽くす時間を表しているので、試験片中の未酸化のＡ
ｌ含有量から求めてもよい。[0015] It is considered that the oxidation increase rapidly increases after the evaluation time t 0 because the Fe—Cr—Al alloy plate is considered to oxidize Al first, and then to oxidize Fe. It is considered that the rate of increase in the amount of oxidation increase is low while Al in the inside is oxidized, but when Al is completely oxidized, Fe is oxidized. Therefore, since the above evaluation time t 0 represents the time during which Al in the alloy is completely oxidized, the unoxidized A
It may be determined from the 1 content.
【００１６】そして、上記図１から、ＡＸガス雰囲気中
及び窒素ガス雰囲気中のいずれであっても、仕上圧延で
の圧下率を抑えて、当該圧下率を３０〜５０％の範囲し
た方が一番評価時間ｔ0 が大きくなり高温環境下での耐
酸化性が良好となることが分かる。From FIG. 1, it is clear that the reduction rate in finish rolling is suppressed and the reduction rate is preferably in the range of 30 to 50% in either the AX gas atmosphere or the nitrogen gas atmosphere. It can be seen that the number evaluation time t 0 increases, and the oxidation resistance in a high temperature environment improves.
【００１７】このことから、請求項１に係る発明では、
少なくとも仕上圧延での圧下率を３０〜５０％に規制し
て耐酸化性の向上を図ったものである。さらに、図１か
ら、ＡＸガス雰囲気中での仕上焼鈍よりも窒素ガス雰囲
気中での仕上焼鈍の方が耐酸化性に優れていることが分
かる。特に、上記のように仕上圧延での圧下率を３０〜
５０％に規制した場合に、ＡＸガス雰囲気に比べて格段
と優れたものとなる。From this, in the invention according to claim 1,
At least the rolling reduction in finish rolling is restricted to 30 to 50% to improve oxidation resistance. Furthermore, FIG. 1 shows that the finish annealing in the nitrogen gas atmosphere is more excellent in oxidation resistance than the finish annealing in the AX gas atmosphere. In particular, as described above, the rolling reduction in finish rolling is 30 to
When it is regulated to 50%, it is much better than the AX gas atmosphere.
【００１８】このことから、請求項２に係る発明では、
少なくとも仕上焼鈍を窒素ガス（Ｎ 2 ：１００VOL.％）
雰囲気中で行うようにしたものである。ここで、仕上圧
延での圧下率が５０％を超えると、耐酸化性が劣化し、
特に窒素ガス雰囲気の方が劣化の程度が大きいのは、圧
下率が高くなるに従い、圧延材表面の歪みエネルギーが
大きくなって表面が活性化され、窒素ガス雰囲気での焼
鈍では、表面の窒化が起こりやすくなり、また、ＡＸガ
ス雰囲気での焼鈍では、微量酸化性ガス（Ｏ2 、Ｈ2 Ｏ
等）による酸化が発生しやすくなったと推察される。From this, in the invention according to claim 2,
At least finish annealing is performed using nitrogen gas (N Two: 100VOL.%)
This is performed in an atmosphere. Where finishing pressure
If the rolling reduction in rolling exceeds 50%, the oxidation resistance deteriorates,
In particular, the degree of deterioration in a nitrogen gas atmosphere is greater
As the lower rate increases, the strain energy on the rolled material surface increases
As the surface grows and the surface is activated, firing in a nitrogen gas atmosphere
If it is dull, nitriding of the surface is likely to occur, and the AX gas
In annealing in a gas atmosphere, a trace amount of oxidizing gas (OTwo, HTwoO
It is presumed that oxidation due to the above-mentioned susceptibility was likely to occur.
【００１９】また、圧下率が３０％未満になると、耐酸
化性が劣化する理由は定かではないが、以下のように推
察される。すなわち、前段での焼鈍（中間焼鈍）で板表
面に生成した窒化物ないし酸化物が圧下率が低いため
に、仕上圧延後もそのまま板表面に残存して良好な新生
面が現れず、耐酸化性を劣化させたものと考えられる。When the rolling reduction is less than 30%, the reason why the oxidation resistance is deteriorated is not clear, but is presumed as follows. That is, since the nitride or oxide formed on the sheet surface by the annealing in the previous stage (intermediate annealing) has a low rolling reduction, it remains on the sheet surface even after finish rolling, and a good new surface does not appear. Is considered to have deteriorated.
【００２０】[0020]
【発明の実施の形態】次に、本発明の実施の形態を図面
を参照しつつ説明する。本実施形態に係る製造ライン工
程の設備構成は、従来と同様であり、例えば、図３に示
すように、上流側から、熱延薄板について第１回目の冷
間圧延を行う１又は２基以上のゼンジミアミル（第１の
圧延）、第１回目の焼鈍・酸洗等を行う第１焼鈍設備
（第１焼鈍２）、第２回目の冷間圧延を行う１又は２基
以上のゼンジミアミル（中間圧延３）、光輝焼鈍設備
（中間焼鈍４）、仕上冷間圧延を行う１又は２基以上の
ゼンジミアミル（仕上圧延５）、及び光輝焼鈍による仕
上焼鈍設備（仕上焼鈍６）の順に配置されている。な
お、上記中間圧延３及び中間焼鈍４は、必要に応じて複
数回、繰り返される場合もある。Next, embodiments of the present invention will be described with reference to the drawings. The equipment configuration of the production line process according to the present embodiment is the same as the conventional one, and, for example, as shown in FIG. 3, one or more units that perform the first cold rolling on a hot-rolled thin plate from the upstream side Sendzimir mill (first rolling), first annealing equipment (first annealing 2) for performing first annealing / pickling, etc., and one or more Sendzimir mills (intermediate rolling) for performing second cold rolling 3), bright annealing equipment (intermediate annealing 4), one or more Sendzimir mills (finish rolling 5) for performing finish cold rolling, and finish annealing equipment by bright annealing (finish annealing 6). The intermediate rolling 3 and the intermediate annealing 4 may be repeated a plurality of times as necessary.
【００２１】第１焼鈍２は、大気雰囲気で焼鈍を行い、
焼鈍で生じた表面酸化物を酸洗・研削等によって除去す
る。中間焼鈍４は、ＡＸガス若しくはＮ2 ガスを雰囲気
ガスとした無酸化雰囲気で行う。The first annealing 2 is performed in an air atmosphere.
Surface oxides generated by annealing are removed by pickling, grinding, or the like. The intermediate annealing 4 is performed in a non-oxidizing atmosphere using AX gas or N 2 gas as an atmospheric gas.
【００２２】また、第１の圧延１及び中間圧延３では、
その圧下率を８０％等、従来と同様に高めに設定して行
う。また、本実施形態では、仕上圧延５における圧下率
を３０〜５０％の範囲に制御して行い、仕上圧延５では
Ｎ2 ガス雰囲気で行う。In the first rolling 1 and the intermediate rolling 3,
The rolling reduction is set to a high value, such as 80%, as in the prior art. In the present embodiment, the rolling reduction in the finish rolling 5 is controlled in a range of 30 to 50%, and the finishing rolling 5 is performed in an N 2 gas atmosphere.
【００２３】そして、例えば、熱間圧延で板厚２mmとし
た熱延薄板を、第１の圧延１により板厚０．８mmとし、
中間圧延３により板厚０．１mmとし、仕上圧延５により
板厚０．０５mmに圧延するように各圧延工程のゼンジミ
アミルの圧下率を調整する。Then, for example, a hot-rolled thin plate having a thickness of 2 mm by hot rolling is formed to a thickness of 0.8 mm by the first rolling 1,
The rolling reduction of the Sendzimir mill in each rolling step is adjusted so that the intermediate rolling 3 reduces the sheet thickness to 0.1 mm and the finish rolling 5 reduces the sheet thickness to 0.05 mm.
【００２４】本実施形態では、製品の品質に一番影響の
与える、仕上圧延５での圧下率を３０〜５０％に設定し
且つ仕上圧延５の雰囲気ガスをＮ2 ガス（Ｎ2 ：１００
VOL.％）としたので、高温環境下での耐酸化性に優れた
薄物のＦｅ−Ｃｒ−Ａｌ合金板を得ることができる。In the present embodiment, the reduction rate in the finish rolling 5, which has the greatest influence on the quality of the product, is set to 30 to 50%, and the atmosphere gas in the finish rolling 5 is N 2 gas (N 2 : 100).
VOL.%), It is possible to obtain a thin Fe-Cr-Al alloy plate having excellent oxidation resistance in a high-temperature environment.
【００２５】ここで、仕上圧延５より前段の圧延（第１
の圧延１、及び中間圧延３）における圧下率は、特に制
限する必要はないが、できるだけ圧下率を高くした方
が、圧延回数の削減の面からは有利である。Here, the pre-rolling (before finishing rolling 5) (first rolling)
The rolling reduction in the rolling 1 and the intermediate rolling 3) does not need to be particularly limited, but increasing the rolling reduction as much as possible is advantageous from the viewpoint of reducing the number of times of rolling.
【００２６】なお、中間圧延３といえども、圧下率を高
くすると窒化物や酸化物の生成量が増加して製品の耐酸
化性を劣化させることが考えられるが、前述したように
仕上圧延５での圧下率を３０％以上に設定することで、
中間圧延３での悪影響を抑えることができる。It is conceivable that, even in the intermediate rolling 3, when the rolling reduction is increased, the amount of nitrides and oxides formed increases and the oxidation resistance of the product is deteriorated. By setting the rolling reduction at 30% or more,
An adverse effect in the intermediate rolling 3 can be suppressed.
【００２７】また、中間圧延３及び中間焼鈍４について
も、本願発明に基づき圧下率を３０〜５０％とすると共
に、雰囲気ガスをＮ2 ガスとして、更に、高温環境下で
の耐酸化性に優れた薄物のＦｅ−Ｃｒ−Ａｌ合金板を得
るようにしても良い。但し、この場合には、圧下率の最
大が５０％となるので、圧延回数を増加する等，生産効
率上の面から不利となる。Also, the intermediate rolling 3 and the intermediate annealing 4 have a rolling reduction of 30 to 50% based on the present invention, and use an atmosphere gas of N 2 gas, and have excellent oxidation resistance in a high temperature environment. A thin Fe—Cr—Al alloy plate may be obtained. However, in this case, the maximum draft is 50%, which is disadvantageous in terms of production efficiency, such as increasing the number of times of rolling.
【００２８】また、上記実施形態では、仕上圧延を窒素
ガス雰囲気で行っているが、ＡＸガス雰囲気で行っても
よい。図１から、窒素ガス雰囲気で行う場合よりも耐酸
化性が落ちるものの、５０％を超える圧下率で仕上圧延
５を行う場合に比べて、耐酸化性が向上したＦｅ−Ｃｒ
−Ａｌ合金板を製造することができる。In the above embodiment, the finish rolling is performed in a nitrogen gas atmosphere, but may be performed in an AX gas atmosphere. From FIG. 1, although the oxidation resistance is lower than that in the case of performing in a nitrogen gas atmosphere, Fe—Cr having improved oxidation resistance as compared with the case where the finish rolling 5 is performed at a reduction of more than 50%.
-An Al alloy plate can be manufactured.
【００２９】[0029]
【実施例】Ｃｒ：２０ｗｔ％、Ａｌ：５．５ｗｔ％を含
有する鉄基合金の熱延薄板（板厚２mm）を、第１の圧延
１のゼンジミアミルにより板厚０．６mmに冷間圧延し、
第１焼鈍２にて焼鈍・酸洗を行った後、中間圧延３のゼ
ンジミアミルにより板厚０．０９mmまで冷間圧延し、続
いて、雰囲気ガスをＡＸガスとし焼鈍温度を８５０℃と
して中間焼鈍４を行った後、仕上圧延５のゼンジミアミ
ルの圧下率を４４％に設定して冷間圧延（仕上圧延５）
を行って板厚０．０５mmとし、続けて、雰囲気ガスを窒
素ガスとし且つ焼鈍温度を８５０℃として仕上焼鈍６を
行った。EXAMPLE A hot-rolled thin sheet (sheet thickness: 2 mm) of an iron-based alloy containing Cr: 20 wt% and Al: 5.5 wt% was cold-rolled to a sheet thickness of 0.6 mm by the Sendzimir mill of the first rolling 1. ,
After performing annealing and pickling in the first annealing 2, cold rolling is performed to a sheet thickness of 0.09 mm by a Sendzimir mill of the intermediate rolling 3, and then, the atmosphere gas is set to AX gas, the annealing temperature is set to 850 ° C., and the intermediate annealing 4 is performed. , Cold rolling (finish rolling 5) with the rolling reduction of the Sendzimir mill of finish rolling 5 set to 44%
To a thickness of 0.05 mm, followed by finish annealing 6 by setting the atmosphere gas to nitrogen gas and setting the annealing temperature to 850 ° C.
【００３０】その結果、仕上焼鈍６後の製品の耐酸化性
は、ｔ0 ＝８１０ｈｒと良好となったことを確認した。As a result, it was confirmed that the oxidation resistance of the product after the finish annealing 6 was as good as t 0 = 810 hr.
【００３１】[0031]
【発明の効果】以上説明してきたように、本発明を採用
すると、少なくとも仕上圧延の圧下率や仕上焼鈍の雰囲
気ガスを規定するだけで、製造されたＦｅ−Ｃｒ−Ａｌ
合金板の高温環境下での耐酸化性を向上させることがで
きるという効果がある。As described above, when the present invention is employed, the Fe-Cr-Al alloy produced by simply defining at least the rolling reduction of the finish rolling and the atmosphere gas for the finish annealing is specified.
There is an effect that the oxidation resistance of the alloy plate in a high temperature environment can be improved.
【図１】評価時間と圧下率との関係を示す図である。FIG. 1 is a diagram showing a relationship between an evaluation time and a rolling reduction.
【図２】経過時間に対する酸化増量の増加状態を示す図
である。FIG. 2 is a diagram showing an increase state of an oxidation increase with respect to an elapsed time.
【図３】本発明の実施の形態に係る製造ラインの一例を
示す図である。FIG. 3 is a diagram showing an example of a production line according to the embodiment of the present invention.
１ 第１の圧延 ２ 第１焼鈍 ３ 中間圧延 ４ 中間焼鈍 ５ 仕上圧延 ６ 仕上焼鈍 DESCRIPTION OF SYMBOLS 1 1st rolling 2 1st annealing 3 Intermediate rolling 4 Intermediate annealing 5 Finish rolling 6 Finish annealing
Claims (2)
薄物のＦｅ−Ｃｒ−Ａｌ合金板を製造するにあたり、上
記複数の冷間圧延のうち少なくとも仕上圧延での圧下率
を３０〜５０％に設定することを特徴とするＦｅ−Ｃｒ
−Ａｌ合金板の製造方法。In producing a thin Fe-Cr-Al alloy sheet by repeating cold rolling and annealing a plurality of times, at least a rolling reduction in finish rolling of the plurality of cold rollings is 30 to 50%. Fe-Cr characterized by setting
-A method for producing an Al alloy plate.
での雰囲気ガスを、Ｎ2 ガス及び不可避的不純物から構
成することを特徴とする請求項１に記載したＦｅ−Ｃｒ
−Ａｌ合金板の製造方法。2. The Fe—Cr alloy according to claim 1, wherein an atmosphere gas in at least finish annealing of the plurality of annealings is composed of N 2 gas and unavoidable impurities.
-A method for producing an Al alloy plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10212794A JP2000045032A (en) | 1998-07-28 | 1998-07-28 | PRODUCTION OF Fe-Cr-Al ALLOY SHEET |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10212794A JP2000045032A (en) | 1998-07-28 | 1998-07-28 | PRODUCTION OF Fe-Cr-Al ALLOY SHEET |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000045032A true JP2000045032A (en) | 2000-02-15 |
Family
ID=16628499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10212794A Pending JP2000045032A (en) | 1998-07-28 | 1998-07-28 | PRODUCTION OF Fe-Cr-Al ALLOY SHEET |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000045032A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006043686A1 (en) * | 2004-10-21 | 2006-04-27 | Nippon Steel Materials Co., Ltd. | STEEL SHEET HAVING HIGH Al CONTENT AND EXHIBITING EXCELLENT WORKABILITY AND METHOD FOR PRODUCTION THEREOF |
| CN111733363A (en) * | 2020-01-17 | 2020-10-02 | 天津雨昌环保工程有限公司 | Stainless steel heating plate and preparation method thereof |
-
1998
- 1998-07-28 JP JP10212794A patent/JP2000045032A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006043686A1 (en) * | 2004-10-21 | 2006-04-27 | Nippon Steel Materials Co., Ltd. | STEEL SHEET HAVING HIGH Al CONTENT AND EXHIBITING EXCELLENT WORKABILITY AND METHOD FOR PRODUCTION THEREOF |
| JP2006144116A (en) * | 2004-10-21 | 2006-06-08 | Nippon Steel Corp | STEEL SHEET HAVING HIGH Al CONTENT AND EXHIBITING EXCELLENT WORKABILITY AND METHOD FOR PRODUCTION THEREOF |
| KR101032126B1 (en) | 2004-10-21 | 2011-05-02 | 신닛테츠 마테리알즈 가부시키가이샤 | STEEL SHEET HAVING HIGH Al CONTENT AND EXHIBITING EXCELLENT WORKABILITY AND METHOD FOR PRODUCTION THEREOF |
| US9028625B2 (en) | 2004-10-21 | 2015-05-12 | Nippon Steel Materials Co., Ltd. | High Al-content steel sheet excellent in workability and method of production of same |
| US9616411B2 (en) | 2004-10-21 | 2017-04-11 | Nippon Steel & Sumkin Materials Co., Ltd. | High Al-content steel sheet excellent in workability and method of production of same |
| CN111733363A (en) * | 2020-01-17 | 2020-10-02 | 天津雨昌环保工程有限公司 | Stainless steel heating plate and preparation method thereof |
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