JP3213234B2 - High ductility chromium steel sheet - Google Patents
High ductility chromium steel sheetInfo
- Publication number
- JP3213234B2 JP3213234B2 JP08804796A JP8804796A JP3213234B2 JP 3213234 B2 JP3213234 B2 JP 3213234B2 JP 08804796 A JP08804796 A JP 08804796A JP 8804796 A JP8804796 A JP 8804796A JP 3213234 B2 JP3213234 B2 JP 3213234B2
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- chromium steel
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、フェライト系ステ
ンレス鋼板に関し、特に高い延性を示すクロム鋼板を得
る技術に係わる。The present invention relates to a ferritic stainless steel sheet, and more particularly to a technique for obtaining a chromium steel sheet having high ductility.
【０００２】[0002]
【従来の技術】クロムを含有する鋼板の代表鋼種である
フェライト系ステンレス鋼板は、通常、連続鋳造で得た
鋳片を加熱した後、熱間圧延−熱延板焼鈍−冷間圧延−
仕上焼鈍の各工程を順次経て製造される。このようにし
て製造されたフェライト系ステンレス鋼板は、一般に、
耐応力腐食割れ性に優れると共に、比較的安価であるこ
とから、各種厨房器具、自動車部品などの分野で幅広く
使用されている。しかしながら、例えば、自動車の燃料
フィルタケースなどに使用した場合、過酷な深絞り加工
を行う必要があるが、かかる鋼板を使用したのでは、伸
びが十分でないという問題が生じていた。2. Description of the Related Art Generally, a ferritic stainless steel sheet, which is a typical steel sheet containing chromium, is prepared by heating a slab obtained by continuous casting, followed by hot rolling, hot-rolled sheet annealing, and cold rolling.
It is manufactured through each step of finish annealing. The ferritic stainless steel sheet manufactured in this way is generally
Since it is excellent in stress corrosion cracking resistance and relatively inexpensive, it is widely used in various fields such as kitchen appliances and automobile parts. However, for example, when used for a fuel filter case of an automobile, it is necessary to perform severe deep drawing, but using such a steel plate has a problem that elongation is not sufficient.
【０００３】そこで、フェライト系ステンレス鋼板の深
絞り成形性を改善するため、これまでにも数多くの試み
がされ、公開された技術も少なくない。例えば、特公昭
５４−１１７７０号公報は、Ｆｅ−ＣｒにＴｉを一定量
添加することで、従来より冷間加工性の良いフェライト
系ステンレス鋼板を製造する技術を開示している。ま
た、特公昭５７−５５７８７号公報は、Ｂを添加するこ
とで従来よりランクフォード値（ｒ値）やＥｌ（延び特
性）を目指したフェライト系ステンレス鋼板の製造技術
を提案している。さらに、特公平２−７３９１号公報
は、ＴｉとＢの両方を添加することで、深絞り後の張出
し成形時に脆性割れを生じにくいフェライト系ステンレ
ス鋼板の製造技術を開示している。[0003] In order to improve the deep drawability of ferritic stainless steel sheets, many attempts have been made so far, and a number of techniques have been disclosed. For example, Japanese Patent Publication No. 54-11770 discloses a technique of manufacturing a ferritic stainless steel sheet having better cold workability by adding a certain amount of Ti to Fe-Cr. In addition, Japanese Patent Publication No. 57-55787 proposes a manufacturing technique of a ferritic stainless steel sheet which aims at a Rankford value (r value) or El (elongation property) by adding B. Furthermore, Japanese Patent Publication No. 2-7391 discloses a technique for producing a ferritic stainless steel sheet that is less likely to cause brittle cracking during stretch forming after deep drawing by adding both Ti and B.
【０００４】しかしながら、上記した各技術には、それ
ぞれ以下の述べるような問題点があった。すなわち、特
公昭５４−１１７７０号公報記載の技術で得た鋼板で
は、過酷な深絞り加工後の二次加工時に、加工部に脆性
割れが散見されることがあった。また、特公昭５７−５
５７８７号公報に開示された技術で得た鋼板では、十分
な深絞り性が得られないため、過酷な深絞り加工には適
さないという問題があった。さらに、特公平２−７３９
１号公報に記載の技術で得た鋼板は、ＴｉとＢの両方を
添加しているにも拘らず、深絞り性あるいは二次加工脆
性のいずれかの特性が劣り、両方の特性を同時に満足す
るものではなかった。加えて、上記した各技術では、Ｅ
ｌが十分に改善されていないという問題もあった。However, each of the above techniques has the following problems. That is, in the steel sheet obtained by the technique described in Japanese Patent Publication No. 54-11770, brittle cracks were sometimes found in the processed portion during the secondary processing after severe deep drawing. In addition, Japanese Patent Publication No. 57-5
The steel plate obtained by the technique disclosed in Japanese Patent No. 5787 cannot provide sufficient deep drawability, and thus is not suitable for severe deep drawing. Furthermore, 2-739
The steel sheet obtained by the technique described in Japanese Patent Publication No. 1 is inferior in either deep drawability or secondary work embrittlement properties, and simultaneously satisfies both properties, despite the addition of both Ti and B. Was not something to do. In addition, in each of the above technologies, E
There was also a problem that 1 was not sufficiently improved.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、かかる事情
を鑑み、深絞り性や耐二次加工脆性が高く、３７％以上
の延び特性（Ｅｌ）を有する高延性クロム鋼板を提供す
ることを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and provides a highly ductile chromium steel sheet having high deep drawability and high resistance to secondary working brittleness and having an elongation property (El) of 37% or more. The purpose is.
【０００６】[0006]
【課題を解決するための手段】発明者は、上記目的を達
成するため鋭意研究し、クロム含有鋼板の延び特性（Ｅ
ｌ）は、その固溶Ｎｂ量（特に、固溶Ｎｂが増えると、
Ｅｌが良くなるという全く新規な知見）及びＡＩ値（時
効指数）と関係していることを知り、本発明を創案し
た。Means for Solving the Problems The inventor of the present invention has made intensive studies to achieve the above object, and has studied the elongation characteristics (E) of chromium-containing steel sheets.
l) is the amount of the solute Nb (particularly, when the solute Nb increases,
The present inventors have found out that the present invention is related to an AI value (age index), which is a completely new finding that El is improved, and found the present invention.
【０００７】すなわち、本発明は、 Ｃ： ０．００２ｗｔ％以上０．０３ ｗｔ％以下、 Ｓｉ： １．０ ｗｔ％ 以下、 Ｍｎ： １．０ ｗｔ％以下、 Ｐ： ０．０５ ｗｔ％以下、 Ｓ： ０．０１５ ｗｔ％以下、 Ａｌ： ０．１０ ｗｔ％以下、 Ｎ： ０．００５ｗｔ％以上０．０２ ｗｔ％以下、 Ｃｒ： ５〜６０ ｗｔ％以下、 Ｔｉ： ４（Ｃ＋Ｎ）〜０．５ ｗｔ％、 Ｎｂ： ０．００３〜０．０２ ｗｔ％、 固溶Ｎｂ： ０．００３〜０．０２０ ｗｔ％ Ｂ： ０．０００２〜０．００５ ｗｔ％ を含み、残部がＦｅおよび不可避的不純物からなり、且
つＡＩ（時効指数）が５０ ＭＰａ以下であることを特
徴とする高延性クロム鋼板である。That is, the present invention provides: C: 0.002% to 0.03% by weight , Si: 1.0% by weight or less, Mn: 1.0% by weight or less, P: 0.05% by weight or less, S: 0.015 wt% or less, Al: 0.10 wt% or less, N: 0.005 wt% or more and 0.02 wt% or less, Cr: 5-60 wt% or less, Ti: 4 (C + N) -0. 5 wt%, Nb: 0.003 to 0.02 wt%, solute Nb: 0.003 to 0.020 wt% B: 0.0002 to 0.005 wt%, the balance being Fe and unavoidable impurities And an AI (aging index) of 50 MPa or less.
【０００８】また、本発明は、上記鋼板に、 Ｃａ：０．０００５〜０．０１ ｗｔ％ Ｍｏ：０．０１〜５．０ ｗｔ％ Ｓｅ：０．０００５〜０．０２５ ｗｔ％ から選択した１種以上を添加したことを特徴とする高延
性クロム鋼板でもある。なお、本発明でのＡＩ（時効指
数）は、鋼板に７．５％の引張予歪を与えた後、３００
℃で３０分加熱し、再引張を行って求めたΔＹＳ（ＭＰ
ａ）値である。In the present invention, the steel sheet is selected from the group consisting of Ca: 0.0005 to 0.01 wt% Mo: 0.01 to 5.0 wt% Se: 0.0005 to 0.025 wt% It is also a high ductility chromium steel sheet characterized by adding more than one kind. The AI (aging index) in the present invention was 300% after giving a tensile prestrain of 7.5 % to the steel sheet.
ΔYS ( MP
a ) Value.
【０００９】本発明では、クロム鋼板の母材を上記のよ
うに限定するようにしたので、３７％以上の高い延性を
有するクロム鋼板が得られるようになる。In the present invention, since the base material of the chromium steel sheet is limited as described above, a chromium steel sheet having a high ductility of 37% or more can be obtained.
【００１０】[0010]
【発明の実施の形態】以下に、本発明で採用した限定理
由を述べる。 Ｃ：０．０３重量％以下；Ｃは、ｒ値及び延び特性を低
下させる元素である。特に、０．０３重量％を超える
と、その影響が顕著になるので０．０３重量％以下とす
る必要がある。好ましくは０．０１重量％以下の範囲が
よい。 Ｓｉ：１．０重量％以下；Ｓｉは、脱酸のために有効な
元素であるが、過剰の添加は冷間加工性の低下を招くの
で、その添加範囲は１．０重量％以下、好ましくは０．
５重量％以下とする。 Ｍｎ：１．０重量％以下；Ｍｎは、鋼中に存在するＳを
析出固定し、熱間圧延性を保つために有効な元素である
が、過剰の添加は冷間加工性の低下を招くので、その添
加範囲は１．０重量％以下、好ましくは０．５重量％以
下とする。 Ｐ：０．０５重量％以下；Ｐは、熱間加工性に有害な元
素である。特に、０．０５重量％を超えるとその影響が
顕著になるので、０．０５重量％以下、好ましくは０．
０４重量％以下とする。 Ｓ：０．０１５重量％以下；Ｓは、結晶粒界に偏析し、
粒界脆化を促進する有害な元素である。とくに、０．０
１５重量％を超えるとその影響が顕著になるので、０．
１５重量％以下、好ましくは０．００８重量％以下とす
る。 Ａｌ：０．１０重量％以下；Ａｌは、脱酸のために有効
な元素であるが、過剰な添加はＡｌ系介在物の増加によ
り、加工時に表面傷を招く原因となるので、０．１０重
量％以下、好ましくは０．０７重量％以下の範囲で添加
する。 Ｎ：０．０２重量％以下；Ｎは、Ｃと同様に、深絞り性
に有害な元素である。特に、０．０２重量％を超えると
その影響が顕著になるので、０．０２重量％以下とする
必要がある。好ましくは０．０１重量％以下の範囲がよ
い。 Ｃｒ：５〜６０重量％；Ｃｒは、ステンレス鋼としての
耐食性を確保するために不可欠な元素である。その量が
５重量％未満では耐食性が不足し、一方６０重量％を超
えての添加は冷間加工性の低下を招くので、その添加範
囲は５〜６０重量％、好ましくは１０〜４５重量％とす
る。 Ｔｉ：４（Ｃ＋Ｎ）〜０．５重量％；Ｔｉは、深絞り性
に有害なＣ、Ｎを析出固定し、高い深絞り性を確保する
ために有用な元素である。その効果は、４（Ｃ＋Ｎ）重
量％未満では得られず、一方０．５重量％を超えて添加
してもこれらの効果が飽和するのみでなく、製造性が低
下する。したがって、Ｔｉの添加量は、４（Ｃ＋Ｎ）〜
０．５重量％、好ましくは４（Ｃ＋Ｎ）〜０．３重量％
とする。 Ｎｂ：０．００３〜０．０２０重量％；Ｎｂは、本発明
においてＴｉ、Ｂなどとの複合添加により深絞り成形性
と耐二次加工脆性とを同時に改善する時に重要な元素で
ある。その効果は、０．００３重量％未満では得られ
ず、一方、０．０２０重量％を超えて添加しても効果が
飽和し、却って製造コストの上昇を招くことになるの
で、Ｎｂの添加量は０．００３〜０．０２０重量％、好
ましくは０．００４〜０．０１８重量％とする。 Ｂ：０．０００２〜０．００５重量％；Ｂは、深絞り成
形後の耐二次加工脆性を改善するための有効な元素であ
る。その効果は、０．０００２重量％未満では得られな
いが、過剰の添加は深絞り成形性を劣化させるので、そ
の添加量は０．０００２〜０．００５重量％、好ましく
は０．０００３〜０．００３重量％とする。 固溶Ｎｂ：０．００３〜０．０２０重量％ 本発明で最も重要な事項であり、発明者が苦心したとこ
ろである。上記範囲に限定した理由は、実験結果を示す
鋼板の延び特性とこの固溶Ｎｂ量との関係から定めた。
つまり、図１から明らかなように、ＡＩ（時効指数）が
５０ＭＰａ以下の条件では、鋼板の固溶Ｎｂが増すと、
延びが大きくなる傾向がある。しかし、０．００３重量
％未満の添加では、Ｅｌは従来の値程度にしかならず不
足するので、本発明では、０．００３重量％を下限とし
た。一方、０．０２０重量％を超えて添加すると、鋼板
の材質が硬化するので、その値を上限とした。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The reasons for limitation adopted in the present invention will be described below. C: 0.03% by weight or less; C is an element that lowers the r value and elongation characteristics. In particular, if the content exceeds 0.03% by weight, the effect becomes remarkable. Therefore, the content needs to be 0.03% by weight or less. Preferably, the range is 0.01% by weight or less. Si: 1.0% by weight or less; Si is an element effective for deoxidation, but an excessive addition causes a reduction in cold workability, so the addition range is 1.0% by weight or less, preferably Is 0.
5% by weight or less. Mn: 1.0% by weight or less; Mn is an element effective for precipitating and fixing S present in steel and maintaining hot rollability, but excessive addition causes reduction in cold workability. Therefore, the addition range is 1.0% by weight or less, preferably 0.5% by weight or less. P: 0.05% by weight or less; P is an element harmful to hot workability. In particular, if the content exceeds 0.05% by weight, the effect becomes remarkable.
04% by weight or less. S: 0.015% by weight or less; S segregates at crystal grain boundaries,
It is a harmful element that promotes grain boundary embrittlement. In particular, 0.0
If the content exceeds 15% by weight, the effect becomes remarkable.
It is 15% by weight or less, preferably 0.008% by weight or less. Al: 0.10% by weight or less; Al is an effective element for deoxidation, but excessive addition of Al causes inclusions to cause surface flaws at the time of processing due to an increase in Al-based inclusions. %, Preferably 0.07% by weight or less. N: 0.02% by weight or less; N is an element harmful to deep drawability, like C. In particular, if the content exceeds 0.02% by weight, the effect becomes remarkable. Therefore, the content needs to be 0.02% by weight or less. Preferably, the range is 0.01% by weight or less. Cr: 5 to 60% by weight; Cr is an indispensable element for ensuring corrosion resistance as stainless steel. If the amount is less than 5% by weight, the corrosion resistance is insufficient, while if the amount exceeds 60% by weight, the cold workability is reduced, so the addition range is 5 to 60% by weight, preferably 10 to 45% by weight. And Ti: 4 (C + N) to 0.5% by weight; Ti is an element useful for precipitating and fixing C and N which are harmful to deep drawability and ensuring high deep drawability. The effect cannot be obtained when the content is less than 4 (C + N)% by weight, whereas when the content exceeds 0.5% by weight, not only these effects are saturated, but also the productivity is reduced. Therefore, the amount of Ti added is 4 (C + N) ~
0.5% by weight, preferably 4 (C + N) to 0.3% by weight
And Nb: 0.003 to 0.020% by weight; Nb is an important element in the present invention when simultaneously improving the deep drawability and the resistance to secondary working embrittlement by adding Ti and B in combination. The effect cannot be obtained if the content is less than 0.003% by weight. On the other hand, if the content exceeds 0.020% by weight, the effect is saturated and the production cost is increased. Is 0.003 to 0.020% by weight, preferably 0.004 to 0.018% by weight. B: 0.0002 to 0.005% by weight; B is an effective element for improving the resistance to secondary working brittleness after deep drawing. The effect cannot be obtained at less than 0.0002% by weight, but excessive addition deteriorates the deep drawability, so the amount of addition is 0.0002 to 0.005% by weight, preferably 0.0003 to 0% by weight. 0.003% by weight. Solid solution Nb: 0.003 to 0.020% by weight This is the most important matter in the present invention, and the inventor has been struggling. The reason for limiting to the above range was determined from the relationship between the elongation characteristics of the steel sheet showing the experimental results and the amount of the solute Nb.
That is, as is clear from FIG. 1, when the AI (aging index) is 50 MPa or less, when the solid solution Nb of the steel sheet increases,
Elongation tends to be large. However, when the addition is less than 0.003% by weight, the value of El is only about the conventional value and is insufficient. Therefore, in the present invention, the lower limit is set to 0.003% by weight. On the other hand, if added in excess of 0.020% by weight, the material of the steel sheet will be hardened.
【００１１】なお、Ｎｂの添加は溶鋼段階で行われる。
また、固溶Ｎｂ量は、０．００５〜０．０１５％が効果
の点で好ましい。 ＡＩ（時効指数）：５Ｏ ＭＰａ以下 本発明での重要な限定事項であり、発明者の実験結果で
ある図２から、５０ＭＰａを超えると、鋼板のＥｌが急
激に低下して深絞りに不十分な値となることが明らかで
ある。なお、このＡＩ値は、４０ＭＰａ以下が効果の点
で好ましい。The addition of Nb is performed at the molten steel stage.
The amount of solid solution Nb is preferably 0.005 to 0.015% from the viewpoint of the effect. AI (aging index): 50 MPa or less This is an important limitation in the present invention. As shown in FIG. 2 which is an experimental result of the inventor, when the pressure exceeds 50 MPa, El of the steel sheet sharply decreases and is insufficient for deep drawing. It is clear that the values are as follows. The AI value is preferably 40 MPa or less from the viewpoint of the effect.
【００１２】また、本発明での固溶Ｎｂ量とＡＩ値は、
溶鋼段階での成分添加と、熱延、熱延板焼鈍、仕上焼鈍
と続く熱履歴の適正化で所定値に調整される。さらに、
本発明では、Ｃａ：０．０００５〜０．０１、Ｍｏ：
０．０１〜５．０重量％、Ｓｅ：０．０００５〜０．０
２５重量％の添加も行っている。つまり、これらの成分
から選ばれた１種以上の添加で、一層高い延び特性が得
られるからである。また、本発明は、熱延板でもその効
果を発揮する。In the present invention, the amount of dissolved Nb and the AI value are as follows:
It is adjusted to a predetermined value by adding components in the molten steel stage and optimizing the heat history following hot rolling, hot rolling sheet annealing and finish annealing. further,
In the present invention, Ca: 0.0005 to 0.01, Mo:
0.01 to 5.0% by weight, Se: 0.0005 to 0.0
An addition of 25% by weight is also performed. That is, a higher elongation property can be obtained by adding one or more kinds selected from these components. Further, the present invention exerts its effect even on a hot-rolled sheet.
【００１３】[0013]
【実施例】溶鋼段階で成分を調整した後、連続鋳造によ
って表１に示す鋳片を得た。EXAMPLES After adjusting the components in the molten steel stage, cast pieces shown in Table 1 were obtained by continuous casting.
【００１４】[0014]
【表１】 [Table 1]
【００１５】それらの鋳片を熱間圧延、熱延板焼鈍、冷
間圧延、仕上焼鈍を行い、得られた冷延板から試験片を
採取し、ＪＩＳ Ｚ２２４１に従った引張試験を行い、
各試験片の延び特性を測定した。その結果を、固溶Ｎｂ
量及びＡＩ値と共に、表２に示す。The slabs were subjected to hot rolling, hot rolled sheet annealing, cold rolling, and finish annealing, and test specimens were collected from the obtained cold rolled sheets and subjected to a tensile test according to JIS Z2241.
The elongation characteristics of each test piece were measured. The results are shown as solid solution Nb
The results are shown in Table 2 together with the amount and the AI value.
【００１６】[0016]
【表２】 [Table 2]
【００１７】表１及び表２より、本発明に係るクロム鋼
板のＥｌ値は、すべて３７％以上を達成しているが、比
較例による鋼板では、従来通りの延び値しか得られない
ことが確認できた。From Tables 1 and 2, it is confirmed that the chromium steel sheets according to the present invention all achieve an El value of 37% or more, but the steel sheets according to the comparative examples can obtain only the conventional elongation values. did it.
【００１８】[0018]
【発明の効果】以上述べたように、本発明により、深絞
り性や耐二次加工脆性が高く、３７％以上の延び特性
（Ｅｌ）を有する高延性クロム鋼板が入手可能になっ
た。As described above, according to the present invention, a highly ductile chromium steel sheet having high deep drawability and high resistance to secondary working brittleness and having an elongation property (El) of 37% or more has become available.
【図１】クロム鋼板の固溶Ｎｂ量と延び特性との関係を
示す図である。FIG. 1 is a graph showing the relationship between the amount of solute Nb of a chromium steel sheet and elongation characteristics.
【図２】クロム鋼板のＡＩ値と延び特性との関係を示す
図である。FIG. 2 is a diagram showing a relationship between an AI value of a chromium steel sheet and elongation characteristics.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 進 千葉市中央区川崎町１番地 川崎製鉄株 式会社 千葉製鉄所内 (56)参考文献 特開 平７−150302（ＪＰ，Ａ) 特公 昭57−55787（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 38/00 - 38/60 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Susumu Sato 1 Kawasaki-cho, Chuo-ku, Chiba-shi Kawasaki Steel Corporation Chiba Works (56) References JP-A-7-150302 (JP, A) Tokubo Sho57 -55787 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) C22C 38/00-38/60
Claims (2)
０３ ｗｔ％以下、 Ｓｉ： １．０ ｗｔ％ 以下、 Ｍｎ： １．０ ｗｔ％以下、 Ｐ： ０．０５ ｗｔ％以下、 Ｓ： ０．０１５ ｗｔ％以下、 Ａｌ： ０．１０ ｗｔ％以下、 Ｎ： ０．００５ｗｔ％以上０．０２ ｗｔ％以下、 Ｃｒ： ５〜６０ ｗｔ％以下、 Ｔｉ： ４（Ｃ＋Ｎ）〜０．５ ｗｔ％、 Ｎｂ： ０．００３〜０．０２ ｗｔ％、 固溶Ｎｂ： ０．００３〜０．０２０ ｗｔ％ Ｂ： ０．０００２〜０．００５ ｗｔ％ を含み、残部がＦｅおよび不可避的不純物からなり、且
つＡＩ（時効指数）が５０ ＭＰａ以下であることを特
徴とする高延性クロム鋼板。C: 0.002 wt% or more
03 wt% or less, Si: 1.0 wt% or less, Mn: 1.0 wt% or less, P: 0.05 wt% or less, S: 0.015 wt% or less, Al: 0.10 wt% or less, N: 0.005 to 0.02 wt%, Cr: 5 to 60 wt%, Ti: 4 (C + N) to 0.5 wt%, Nb: 0.003 to 0.02 wt%, solid solution Nb: 0.003 to 0.020 wt% B: 0.0002 to 0.005 wt%, with the balance being Fe and unavoidable impurities, and having an AI (aging index) of 50 MPa or less. And high ductile chromium steel sheet.
項１記載の高延性クロム鋼板。2. At least one selected from the group consisting of Ca: 0.0005 to 0.01 wt% Mo: 0.01 to 5.0 wt% Se: 0.0005 to 0.025 wt% The high ductility chromium steel sheet according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08804796A JP3213234B2 (en) | 1996-04-10 | 1996-04-10 | High ductility chromium steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08804796A JP3213234B2 (en) | 1996-04-10 | 1996-04-10 | High ductility chromium steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09279308A JPH09279308A (en) | 1997-10-28 |
| JP3213234B2 true JP3213234B2 (en) | 2001-10-02 |
Family
ID=13931926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08804796A Expired - Lifetime JP3213234B2 (en) | 1996-04-10 | 1996-04-10 | High ductility chromium steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3213234B2 (en) |
-
1996
- 1996-04-10 JP JP08804796A patent/JP3213234B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09279308A (en) | 1997-10-28 |
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