JP2003239044A - Stainless steel for foil and foil-like stainless steel - Google Patents
Stainless steel for foil and foil-like stainless steelInfo
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- JP2003239044A JP2003239044A JP2002038991A JP2002038991A JP2003239044A JP 2003239044 A JP2003239044 A JP 2003239044A JP 2002038991 A JP2002038991 A JP 2002038991A JP 2002038991 A JP2002038991 A JP 2002038991A JP 2003239044 A JP2003239044 A JP 2003239044A
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、たとえば、スペーサ
ー、薄板バネ、弁バネ、アキュムレータや、ダイヤフラ
ム、特に圧力センサのダイヤフラム（受圧面）などのよ
うに、弾性変形を伴う用途に用いられる箔用ステンレス
鋼および箔状ステンレス鋼に係り、特に、硫黄、塩素、
臭素、硫酸、硝酸等を含む高腐食性の環境でも充分に使
用に耐えるステンレス鋼に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foil used for elastic deformation such as a spacer, a thin leaf spring, a valve spring, an accumulator, a diaphragm, particularly a diaphragm (pressure receiving surface) of a pressure sensor. Related to stainless steel and foil stainless steel, especially sulfur, chlorine,
The present invention relates to stainless steel that can sufficiently withstand use even in a highly corrosive environment containing bromine, sulfuric acid, nitric acid, etc.
【０００２】[0002]
【従来の技術】たとえば、圧力センサ等のダイヤフラム
には、一般にはＳＵＳ３０４、ＳＵＳ３１６等のステン
レス鋼が用いられている。圧力センサのダイヤフラムは
円板状をなし、受ける圧力により板厚方向へ容易に変位
できるように、その周囲には波状の溝（溝は１本の場合
もある）が同心円状に形成されている。2. Description of the Related Art For example, stainless steel such as SUS304 and SUS316 is generally used for a diaphragm such as a pressure sensor. The diaphragm of the pressure sensor has a disk shape, and a corrugated groove (there may be one groove) is concentrically formed around the diaphragm so that the diaphragm can be easily displaced in the plate thickness direction by the pressure received. .
【０００３】[0003]
【発明が解決しようとする課題】ところで、圧力センサ
を用いて自動車の排気ガスの圧力測定を行うと、圧力セ
ンサのダイヤフラムは、高温の腐食性ガスに曝される。
ダイヤフラムは、厚さが例えば３０μｍ程度であるため
高腐食性の環境に対する感受性が高い。しかも、その周
囲の溝で最も大きく弾性変形するから、ダイヤフラムが
腐蝕すると溝におけるダメージが大きく、溝でクラック
が発生して使用不能となることがあった。By the way, when the pressure of the exhaust gas of an automobile is measured using the pressure sensor, the diaphragm of the pressure sensor is exposed to high temperature corrosive gas.
Since the diaphragm has a thickness of, for example, about 30 μm, it is highly sensitive to a highly corrosive environment. In addition, since the surrounding grooves are most elastically deformed, when the diaphragm is corroded, the grooves may be greatly damaged, and cracks may be generated in the grooves to make them unusable.
【０００４】また、ダイヤフラムは、ステンレス鋼の箔
をプレス打抜き加工して製造されるが、加工面に波打ち
が生じるイヤリングと呼ばれる現象が発生し、不良品が
多発するという問題もある。なお、以上の問題は、薄板
バネや弁バネにも当てはまる。Further, the diaphragm is manufactured by press-punching a stainless steel foil, but there is a problem that a defective product frequently occurs due to a phenomenon called earring in which a corrugated surface is generated. The above problems also apply to thin leaf springs and valve springs.
【０００５】したがって、本発明は、箔状に加工されて
も高腐蝕環境で高い耐食性を示すとともに、プレス打抜
き加工性を向上させることができる箔用ステンレス鋼お
よび箔状ステンレス鋼を提供することを目的としてい
る。Therefore, the present invention provides a stainless steel for foil and a foil-shaped stainless steel which exhibit high corrosion resistance in a high-corrosion environment even when processed into a foil shape and can improve press punching workability. Has an aim.
【０００６】[0006]
【課題を解決するための手段】本発明の箔用ステンレス
鋼は、１５．０ｗｔ％≦Ｎｉ≦４０．０ｗｔ％、２０．
０ｗｔ％≦Ｃｒ≦３０．０ｗｔ％、２．０ｗｔ％≦Ｍｏ
≦１０ｗｔ％、Ｎ：０．４０ｗｔ％以下、残部Ｆｅおよ
び不可避的不純物からなり、且つ、下記式を満たすこと
を特徴としている。Means for Solving the Problems The stainless steel for foil according to the present invention is 15.0 wt% ≦ Ni ≦ 40.0 wt%, 20.
0 wt% ≤ Cr ≤ 30.0 wt%, 2.0 wt% ≤ Mo
≦ 10 wt%, N: 0.40 wt% or less, balance Fe and inevitable impurities, and satisfy the following formula.
【数３】Ｃｒ＋３．３Ｍｏ＋２０Ｎ≧３５ （１）
（式中Ｃｒ、Ｍｏ、Ｎは各成分の含有量（ｗｔ％）を示
す）[Equation 3] Cr + 3.3Mo + 20N ≧ 35 (1) (In the formula, Cr, Mo, and N represent the content (wt%) of each component)
【０００７】以下、上記数値限定の根拠を本発明の作用
とともに説明する。Ｎｉ：１５．０ｗｔ％≦Ｎｉ≦４０．０ｗｔ％
Ｎｉはσ相やχ相などの金属間化合物の析出を抑制する
上で有効な元素であり、また組織をオーステナイトにす
る場合には必須な元素である。さらに、Ｎｉは、耐応力
腐食割れ向上にも効果のある元素である。Ｎｉの含有量
が１５．０ｗｔ％未満では、そのような効果を得ること
ができない。一方、Ｎｉの含有量が４０．０ｗｔ％を上
回ると、熱間加工性の劣化や熱間変形抵抗の増大を招
く。よって、Ｎｉの含有量は１５．０〜４０．０ｗｔ％
以下とした。なお、Ｎｉの含有量は１８．０以上がより
好ましく、さらに２０％以上、さらに２５％以上、さら
に２７％以上、さらに３０％以上であればより好まし
い。また、Ｎｉの含有量は、３８％以下がより好まし
く、さらに３６％以下がより好ましい。The grounds for limiting the above numerical values will be described below together with the operation of the present invention. Ni: 15.0 wt% ≤ Ni ≤ 40.0 wt% Ni is an element effective in suppressing the precipitation of intermetallic compounds such as σ phase and χ phase, and is an essential element when the structure is austenite. Is. Further, Ni is an element effective in improving stress corrosion cracking resistance. If the Ni content is less than 15.0 wt%, such an effect cannot be obtained. On the other hand, when the Ni content exceeds 40.0 wt%, the hot workability is deteriorated and the hot deformation resistance is increased. Therefore, the Ni content is 15.0 to 40.0 wt%
Below. The Ni content is more preferably 18.0 or more, further preferably 20% or more, further 25% or more, further 27% or more, further 30% or more. Moreover, the content of Ni is more preferably 38% or less, and further preferably 36% or less.
【０００８】Ｃｒ：１６．０ｗｔ％≦Ｃｒ≦３０．０ｗ
ｔ％
Ｃｒは耐すきま腐食性を向上させるのに有効な元素であ
り、その効果を得るためには１６．０ｗｔ％以上含有す
る必要がある。しかしながら、３０．０ｗｔ％を超えて
含有するとσ相やχ相などの金属間化合物の形成を助長
し、かえって耐すきま腐食性を劣化させる。よって、Ｃ
ｒの含有量は、１６．０〜３０．０ｗｔ％とした。な
お、Ｃｒの含有量は２０．０ｗｔ％以上であることが好
ましく、２２．０ｗｔ％以上であればさらに好ましい。
好ましくは２７％以下、より好ましくは２５％以下が良
い。 Cr: 16.0 wt% ≦ Cr ≦ 30.0w
t% Cr is an element effective for improving the crevice corrosion resistance, and in order to obtain the effect, it is necessary to contain 16.0 wt% or more. However, if the content exceeds 30.0 wt%, formation of intermetallic compounds such as σ phase and χ phase is promoted, and crevice corrosion resistance is rather deteriorated. Therefore, C
The content of r was 16.0 to 30.0 wt%. The Cr content is preferably 20.0 wt% or more, and more preferably 22.0 wt% or more.
It is preferably 27% or less, more preferably 25% or less.
【０００９】Ｍｏ：２．０ｗｔ％≦Ｍｏ≦１０ｗｔ％
Ｍｏも耐すきま腐食性を向上させるのに有効な元素であ
り、その効果を得るためには２．０ｗｔ％以上含有する
必要がある。しかしながら、１０．０ｗｔ％を超えて含
有すると、金属間化合物の析出を助長し、耐食性を逆に
劣化させてしまう。よって、Ｍｏの含有量は、２．０〜
１０．０ｗｔ％とした。なお、Ｍｏの含有量は３．０ｗ
ｔ％以上であることが好ましく、５．０ｗｔ％以上であ
ればさらに好ましい。Ｍｏのより好ましい上限値は８％
である。 Mo: 2.0 wt% ≦ Mo ≦ 10 wt% Mo is also an element effective in improving crevice corrosion resistance, and in order to obtain the effect, it is necessary to contain 2.0 wt% or more. However, if the content exceeds 10.0 wt%, precipitation of intermetallic compounds is promoted and corrosion resistance is deteriorated. Therefore, the Mo content is 2.0 to
It was set to 10.0 wt%. The content of Mo is 3.0w
It is preferably t% or more, and more preferably 5.0 wt% or more. The more preferable upper limit of Mo is 8%.
Is.
【００１０】Ｃｒ＋３．３Ｍｏ＋２０Ｎ≧３５
本発明者等の検討によれば、Ｃｒ＋３．３Ｍｏ＋２０Ｎ
が３５を下回ると、十分な耐食性を有さないことが判明
している。なお、Ｃｒ＋３．３Ｍｏ＋２０Ｎは３８以上
であることが好ましく、４４以上であればさらに好まし
い。 Cr + 3.3Mo + 20N ≧ 35 According to a study by the present inventors, Cr + 3.3Mo + 20N
It has been proved that the value of less than 35 does not have sufficient corrosion resistance. Note that Cr + 3.3Mo + 20N is preferably 38 or more, and more preferably 44 or more.
【００１１】Ｎ：０．４０ｗｔ％以下
ＮはＣｒ、Ｍｏと同様に耐すきま腐食性を向上させると
ともに、金属間化合物の析出を抑制する有効な元素であ
り、ある程度の添加が好ましい。しかしながら、０．４
０ｗｔ％を超えて含有すると、熱間変形抵抗が極めて上
昇して熱間加工性を阻害するので、Ｎの含有量は０．４
０ｗｔ％以下とした。好ましくは、０．３５％以下、よ
り好ましくは、０．３０％以下が良い。なお、Ｎの含有
量は０．１０ｗｔ％以上、さらには０．１５％以上、さ
らには０．１８％以上であることがより好ましい。 N: 0.40 wt% or less N is an effective element that improves crevice corrosion resistance as well as Cr and Mo, and suppresses precipitation of intermetallic compounds, and is preferably added to some extent. However, 0.4
If the content exceeds 0 wt%, the hot deformation resistance is extremely increased and the hot workability is hindered. Therefore, the content of N is 0.4.
It was set to 0 wt% or less. It is preferably 0.35% or less, and more preferably 0.30% or less. The N content is more preferably 0.10 wt% or more, further preferably 0.15% or more, further preferably 0.18% or more.
【００１２】上記構成の箔用ステンレス鋼にあっては、
例えば１５０μｍ以下に加工して高腐食性環境で使用し
ても、成分を上記のように規定することで高い耐食性を
得ることができる。実用的には５μｍ以上、好ましく
は、１０μｍ以上、より好ましくは２０μｍ以上、３０
μｍ以上、である。好ましい上限は、１００μｍ以下、
８０μｍ以下、６０μｍ以下、５０μｍ以下がよい。ま
た、本発明のステンレス鋼は、高腐食性の環境で弾性変
形が生じる部品に用いて特に効果的である。本発明は、
そのようなステンレス鋼で製造した箔も対象としてお
り、１５．０ｗｔ％≦Ｎｉ≦４０．０ｗｔ％、２０．０
ｗｔ％≦Ｃｒ≦３０．０ｗｔ％、２．０ｗｔ％≦Ｍｏ≦
１０ｗｔ％、Ｎ：０．３０ｗｔ％以下、残部Ｆｅおよび
不可避的不純物からなり、且つ、下記式を満たすことを
特徴としている。In the stainless steel for foil having the above structure,
For example, even if processed into 150 μm or less and used in a highly corrosive environment, high corrosion resistance can be obtained by defining the components as described above. Practically 5 μm or more, preferably 10 μm or more, more preferably 20 μm or more, 30
μm or more. A preferred upper limit is 100 μm or less,
It is preferably 80 μm or less, 60 μm or less, and 50 μm or less. Further, the stainless steel of the present invention is particularly effective when used for parts that undergo elastic deformation in a highly corrosive environment. The present invention is
Foil made of such stainless steel is also targeted, and 15.0 wt% ≦ Ni ≦ 40.0 wt%, 20.0 wt%
wt% ≦ Cr ≦ 30.0 wt%, 2.0 wt% ≦ Mo ≦
10% by weight, N: 0.30% by weight or less, balance Fe and unavoidable impurities, and is characterized by satisfying the following formula.
【数４】Ｃｒ＋３．３Ｍｏ＋２０Ｎ≧３５ （１）
（式中Ｃｒ、Ｍｏ、Ｎは各成分の含有量（ｗｔ％）を示
す）[Equation 4] Cr + 3.3Mo + 20N ≧ 35 (1) (In the formula, Cr, Mo, and N indicate the content (wt%) of each component)
【００１３】[0013]
【発明の実施の形態】以下、本発明の好適な実施の形態
について説明する。本発明の箔用ステンレス鋼および箔
状ステンレス鋼は、硬さがＨｖ２５０以下であることが
望ましく、これによりプレス成形性を向上させることが
できる。また、Ｃｕを３．０ｗｔ％以下含有すると好適
であり、これにより、耐すきま腐食性の向上と金属間化
合物の析出抑制にさらに効果的である。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below. The stainless steel for foil and the foil-shaped stainless steel of the present invention preferably have a hardness of Hv250 or less, which can improve press formability. Further, it is preferable to contain Cu in an amount of 3.0 wt% or less, which is more effective in improving crevice corrosion resistance and suppressing precipitation of intermetallic compounds.
【００１４】一般に、プレス加工で生じるイヤリング
は、素材の塑性異方性の影響を受ける。本発明者等は、
厚さ５０μｍ程度の箔の塑性異方性とイヤリング率との
関係を定量的に解析した。その結果、最終冷間圧延後に
焼鈍した表面の再結晶組織における主方位［１１２］＜
１１１＞の集積度を４０％以下にすると、イヤリング率
を数％に低減できることを見い出した。したがって、主
方位［１１２］＜１１１＞の集積度は４０％以下である
ことが望ましく、２０％以下であればさらに望ましく、
１０％以下であればさらに好適である。Generally, the earrings produced by press working are affected by the plastic anisotropy of the material. The present inventors
The relationship between the plastic anisotropy of the foil having a thickness of about 50 μm and the earring rate was quantitatively analyzed. As a result, the main orientation [112] <in the recrystallized structure of the surface annealed after the final cold rolling was
It has been found that the earring rate can be reduced to several percent by setting the degree of accumulation of 111> to 40% or less. Therefore, the integration degree of the main orientation [112] <111> is preferably 40% or less, and more preferably 20% or less,
It is more preferable if it is 10% or less.
【００１５】また、本発明者等は、プレス加工による素
材表面の肌荒れと結晶粒度との関係を調査した。その結
果、ＪＩＳ Ｇ ０５５１に基づく結晶粒度を６以上に
することにより、微細化した結晶粒により延性が良好と
なり、肌荒れの発生を抑制できることを見い出した。な
お、本発明は、ダイヤフラムのような製品により効果的
であり、円盤状のものにもより効果的である。Further, the present inventors investigated the relationship between the roughness of the surface of the material by press working and the grain size. As a result, it was found that by setting the crystal grain size based on JIS G 0551 to 6 or more, the ductility becomes good due to the refined crystal grains, and the occurrence of rough skin can be suppressed. It should be noted that the present invention is more effective for products such as diaphragms, and is more effective for disc-shaped products.
【００１６】ステンレス鋼の表面の再結晶組織における
主方位［１１２］＜１１１＞の集積度を小さくするに
は、１回の冷間圧延における圧下率（加工度）を大きく
せず、かつ、その後の焼鈍温度を高く設定することで結
晶粒を粗大化し、主方位［１１２］＜１１１＞の発達を
阻害して集合組織をランダムにすれば良い。具体的に
は、厚さを２０〜５０％にする冷間圧延を複数回繰り返
し、冷間圧延の都度１１００℃以上の温度で焼鈍すれば
良い。In order to reduce the degree of integration of the main orientation [112] <111> in the recrystallized structure of the surface of stainless steel, the rolling reduction (workability) in one cold rolling is not increased, and thereafter, The crystal grain may be coarsened by setting the annealing temperature of 2 to a high value to hinder the development of the main direction [112] <111> and make the texture random. Specifically, cold rolling to make the thickness 20 to 50% is repeated a plurality of times, and annealing may be performed at a temperature of 1100 ° C. or higher each time cold rolling is performed.
【００１７】[0017]
【実施例】以下、本発明の実施例を説明する。まず、大
気溶解炉によって表１に示す組成を有するステンレス鋼
を５Ｋｇづつ溶製し、これに鍛造、および熱間圧延を施
して厚さ０．５ｍｍの板材を得た。この板材を０．１ｍ
ｍに冷間圧延後、１１００℃で１〜２分間光輝焼鈍し、
次いで、０．０５ｍｍに冷間圧延後、１１００℃で１〜
２分間光輝焼鈍し、最後に、０．０２５ｍｍに冷間圧延
後、１１００℃で１〜２分間光輝焼鈍し、本発明例と比
較例の箔状ステンレス鋼を得た。EXAMPLES Examples of the present invention will be described below. First, 5 kg of stainless steel having the composition shown in Table 1 was melted in an air melting furnace, and forged and hot rolled to obtain a plate material having a thickness of 0.5 mm. This board is 0.1m
After cold rolling to m, bright annealing at 1100 ° C. for 1 to 2 minutes,
Then, after cold rolling to 0.05 mm, 1 to 1100 ° C.
Bright annealing was performed for 2 minutes, and finally, cold rolling was performed to 0.025 mm, and then bright annealing was performed at 1100 ° C. for 1 to 2 minutes to obtain foil-shaped stainless steels of the present invention and comparative examples.
【００１８】１．耐食性の調査
上記の硫酸および塩酸からなるｐＨ０．５の強酸性溶液
に上記箔状ステンレス鋼を２４時間浸漬し、腐蝕度０．
０１ｇ／ｍ２・ｈ以下を維持することができる上限温度
を測定した。その結果を表１に併記する。なお、表１に
おいて本発明の組成の範囲を逸脱する値には下線を付し
てある。1. Investigation of Corrosion Resistance The foil stainless steel was immersed in the above strongly acidic solution of sulfuric acid and hydrochloric acid having a pH of 0.5 for 24 hours to obtain a corrosion degree of 0.
The upper limit temperature capable of maintaining not more than 01 g / m 2 · h was measured. The results are also shown in Table 1. In Table 1, values that deviate from the composition range of the present invention are underlined.
【００１９】[0019]
【表１】 [Table 1]
【００２０】表１から判るように、本発明の組成を有す
る本発明例１，２では、上限温度が８０℃以上であるの
に対して、比較例では上限温度が３０℃であった。この
ことから、本発明の組成を有する箔状ステンレス鋼は、
優れた耐食性を有することが確認された。As can be seen from Table 1, in the present invention examples 1 and 2 having the composition of the present invention, the maximum temperature was 80 ° C or higher, whereas in the comparative example, the maximum temperature was 30 ° C. From this, the foil stainless steel having the composition of the present invention,
It was confirmed to have excellent corrosion resistance.
【００２１】２．集積度の影響調査
表１の本発明例１，２の組成を有する鋼種を用い、冷間
圧延後の焼鈍の温度を表２に示すように１１００〜１１
５０℃とし、その他の条件は上記と同じにして箔状ステ
ンレス鋼を製造した。次いで、箔状ステンレス鋼の表面
の主方位［１１２］＜１１１＞の集積度を X線回折法
により（極点図で方位を確認、強度比で集積度の数値
化）調査し、その結果を表２に併記した。次いで、箔状
ステンレス鋼のイヤリング率を調査し、その結果を表２
に併記した。イヤリング率（ｈｅ）は、直径８０ｍｍの
ブランクに直径４０ｍｍの平頭ポンチを用いて円筒深絞
りを行い、下記式で求めた。なお、式中ｈｍａｘは、深
絞りで形成した円筒状カップの底からイヤリング（フラ
ンジ部分に発生）の山までの高さであり、ｈｍｉｎは谷
までの高さである。2. Investigation of the influence of the degree of integration Using the steel types having the compositions of the invention examples 1 and 2 in Table 1, the annealing temperatures after cold rolling are 1100 to 11 as shown in Table 2.
Foil-shaped stainless steel was manufactured under the same conditions as above except that the temperature was 50 ° C. Next, the degree of integration of the main orientation [112] <111> on the surface of the foil-shaped stainless steel was investigated by the X-ray diffraction method (the orientation is confirmed by the pole figure, and the degree of integration is quantified by the intensity ratio), and the results are displayed. It is also shown in 2. Then, the earring rate of the foil-shaped stainless steel was investigated, and the results are shown in Table 2.
Also described in. Earring ratio (h e) performs cylindrical deep drawing with a flat head punch having a diameter of 40mm blank diameter 80 mm, was obtained by the following formula. In the formula, h max is the height from the bottom of the cylindrical cup formed by deep drawing to the peak of the earring (generated in the flange portion), and h min is the height to the valley.
【００２２】[0022]
【数５】ｈｅ＝（ｈｍａｘ−ｈｍｉｎ）／（（ｈｍａｘ
＋ｈｍｉｎ）／２）×１００[Number 5] h e = (h max -h min ) / ((h max
+ H min ) / 2) × 100
【００２３】[0023]
【表２】 [Table 2]
【００２４】表２に示すように、箔状ステンレス鋼の表
面の主方位［１１２］＜１１１＞の集積度が７０％の場
合には、イヤリング率が最高で１２％であり、この値で
は、一般には不良品とされる。また、集積度が４０％の
場合にはイヤリング率が最高で６％であり、製品として
の品質上問題はない。したがって、６０％以下の場合が
好適である。さらに、集積度が２０％以下の場合にはイ
ヤリング率が２％以下であり、極めて良好な結果を示し
た。以上の結果から、集積度は５０％以下、４０％以
下、３０％以下、２０％以下が望ましく、１０％以下で
あればさらに良好と言える。As shown in Table 2, when the integration degree of the main orientation [112] <111> on the surface of the foil-shaped stainless steel is 70%, the earring rate is 12% at the maximum, and at this value, Generally regarded as defective. Further, when the degree of integration is 40%, the earring rate is 6% at maximum, and there is no problem in terms of product quality. Therefore, the case of 60% or less is preferable. Furthermore, when the degree of integration is 20% or less, the earring rate is 2% or less, which is a very good result. From the above results, the degree of integration is preferably 50% or less, 40% or less, 30% or less, 20% or less, and 10% or less is more preferable.
【００２５】３．結晶粒度の影響調査
上記箔状ステンレス鋼についてＪＩＳ Ｇ ０５５１に
準拠した結晶粒度を調査した。その結果を表２に併記す
るとともに、上記円筒深絞りで加工面に肌荒れが生じた
か否かを目視で確認した。肌荒れは、コーナー部で白く
光沢が落ちることで判定した。その結果を表２に併記し
た。表２から判るように、結晶粒度が７以上では肌荒れ
が生じなかったが、結晶粒度が５では肌荒れが生じた。
このことから、結晶粒度は６以上が好ましいことが確認
された。3. Investigation of influence of crystal grain size The grain size of the above foil-shaped stainless steel was investigated in accordance with JIS G 0551. The results are also shown in Table 2, and it was visually confirmed whether or not the roughened surface was formed on the processed surface by the above-mentioned deep cylindrical drawing. The rough skin was judged by the whiteness and gloss loss at the corners. The results are also shown in Table 2. As can be seen from Table 2, roughening did not occur when the grain size was 7 or more, but roughened when the grain size was 5.
From this, it was confirmed that the crystal grain size is preferably 6 or more.
【００２６】[0026]
【発明の効果】以上説明したように本発明によれば、箔
状に加工されても高腐蝕環境で高い耐食性を示すととも
に、プレス打抜き加工性を向上させることができる等の
効果が得られる。As described above, according to the present invention, even if it is processed into a foil shape, it exhibits high corrosion resistance in a highly corrosive environment, and the press punching workability can be improved.
Claims (6)
％、２０．０ｗｔ％≦Ｃｒ≦３０．０ｗｔ％、２．０ｗ
ｔ％≦Ｍｏ≦１０ｗｔ％、Ｎ：０．４０ｗｔ％以下、残
部Ｆｅおよび不可避的不純物からなり、且つ、下記式を
満たすことを特徴とする箔用ステンレス鋼。 【数１】 Ｃｒ＋３．３Ｍｏ＋２０Ｎ≧３５ （１） （式中Ｃｒ、Ｍｏ、Ｎは各成分の含有量（ｗｔ％）を示
す）1. 15.0 wt% ≦ Ni ≦ 40.0 wt
%, 20.0 wt% ≤ Cr ≤ 30.0 wt%, 2.0 w
A stainless steel for foil, characterized in that t% ≦ Mo ≦ 10 wt%, N: 0.40 wt% or less, the balance Fe and unavoidable impurities, and satisfy the following formula. ## EQU1 ## Cr + 3.3Mo + 20N ≧ 35 (1) (In the formula, Cr, Mo, and N represent the content (wt%) of each component)
％、２０．０ｗｔ％≦Ｃｒ≦３０．０ｗｔ％、２．０ｗ
ｔ％≦Ｍｏ≦１０ｗｔ％、Ｎ：０．３０ｗｔ％以下、残
部Ｆｅおよび不可避的不純物からなり、且つ、下記式を
満たすことを特徴とする厚さ１５０μｍ以下の箔状ステ
ンレス鋼。 【数２】 Ｃｒ＋３．３Ｍｏ＋２０Ｎ≧３５ （１） （式中Ｃｒ、Ｍｏ、Ｎは各成分の含有量（ｗｔ％）を示
す）2. 15.0 wt% ≦ Ni ≦ 40.0 wt
%, 20.0 wt% ≤ Cr ≤ 30.0 wt%, 2.0 w
A foil-like stainless steel having a thickness of 150 μm or less, characterized in that t% ≦ Mo ≦ 10 wt%, N: 0.30 wt% or less, the balance Fe and unavoidable impurities, and satisfying the following formula. [Equation 2] Cr + 3.3Mo + 20N ≧ 35 (1) (In the formula, Cr, Mo, and N represent the contents (wt%) of each component)
とする請求項２に記載の箔状ステンレス鋼。3. The foil-like stainless steel according to claim 2, which has a hardness of Hv 250 or less.
ることを特徴とする請求項２または３に記載の箔状ステ
ンレス鋼。4. The foil-shaped stainless steel according to claim 2, further containing 3.0 wt% or less of Cu.
組織における主方位［１１２］＜１１１＞の集積度を６
０％以下にしたことを特徴とする請求項２〜４のいずれ
かに記載の箔状ステンレス鋼。5. The degree of integration of the main orientation [112] <111> in the recrystallized structure of the surface annealed after the final cold rolling is 6
The foil-shaped stainless steel according to any one of claims 2 to 4, wherein the content is 0% or less.
が６以上であることを特徴とする請求項２〜５のいずれ
かに記載の箔状ステンレス鋼。6. The foil-shaped stainless steel according to claim 2, which has a crystal grain size of 6 or more based on JIS G 0551.
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|---|---|---|---|
| JP2002038991A JP3730181B2 (en) | 2002-02-15 | 2002-02-15 | Foil-like stainless steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002038991A JP3730181B2 (en) | 2002-02-15 | 2002-02-15 | Foil-like stainless steel |
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| JP3730181B2 JP3730181B2 (en) | 2005-12-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017030149A1 (en) * | 2015-08-17 | 2017-02-23 | 新日鉄住金マテリアルズ株式会社 | Austenitic stainless steel foil |
| EP3339461A4 (en) * | 2015-08-19 | 2019-01-16 | Nippon Steel & Sumikin Materials Co., Ltd. | Stainless steel foil |
| CN110565029A (en) * | 2019-09-20 | 2019-12-13 | 中航上大高温合金材料有限公司 | Production process of S31254 super austenitic stainless steel |
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|---|---|---|---|---|
| WO2017030149A1 (en) * | 2015-08-17 | 2017-02-23 | 新日鉄住金マテリアルズ株式会社 | Austenitic stainless steel foil |
| JP6161840B1 (en) * | 2015-08-17 | 2017-07-12 | 新日鉄住金マテリアルズ株式会社 | Austenitic stainless steel foil |
| CN107923012A (en) * | 2015-08-17 | 2018-04-17 | 新日铁住金高新材料株式会社 | Austenite stainless steel paper tinsel |
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| EP3339461A4 (en) * | 2015-08-19 | 2019-01-16 | Nippon Steel & Sumikin Materials Co., Ltd. | Stainless steel foil |
| US10786974B2 (en) | 2015-08-19 | 2020-09-29 | Nippon Steel Chemical & Material Co., Ltd. | Stainless steel foil |
| CN110565029A (en) * | 2019-09-20 | 2019-12-13 | 中航上大高温合金材料有限公司 | Production process of S31254 super austenitic stainless steel |
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|---|---|
| JP3730181B2 (en) | 2005-12-21 |
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