JPH1180904A - Stainless hot rolled steel sheet excellent in corrosion resistance and its production - Google Patents
Stainless hot rolled steel sheet excellent in corrosion resistance and its productionInfo
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- JPH1180904A JPH1180904A JP24395697A JP24395697A JPH1180904A JP H1180904 A JPH1180904 A JP H1180904A JP 24395697 A JP24395697 A JP 24395697A JP 24395697 A JP24395697 A JP 24395697A JP H1180904 A JPH1180904 A JP H1180904A
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、表面に熱延スケー
ルが付着したままでも耐食性が良好なステンレス熱延鋼
板（以下、熱延鋼帯も含む。）およびその製造方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-rolled stainless steel sheet having good corrosion resistance even when a hot-rolled scale adheres to the surface (hereinafter, also includes a hot-rolled steel strip) and a method for producing the same.
【０００２】[0002]
【従来の技術】ステンレス鋼は、CrやNiといった元素を
多量に含有しているため、普通鋼と比較して著しく優れ
た耐食性を有している。このステンレス鋼板は、一般に
は、次のような工程で製造される。先ず、精錬された溶
鋼を連続鋳造設備によりスラブとされ、1100〜1300℃程
度の温度に加熱後、熱間圧延される。その後、焼鈍およ
び酸洗を経て、熱延焼鈍酸洗板とされる。熱延焼鈍酸洗
板の一部は、このままの状態でも使用されるが、その大
部分は、さらに冷間圧延、仕上げ焼純および酸洗が行わ
れて、冷延製品とされる。上記の工程のうち、熱延鋼板
の酸洗は、熱間圧延工程で鋼板表面に生成した (Fe・C
r)2O3や（Fe・Cr)3O4を主体とした酸化スケールを除去
するためのものであり、この酸洗には、塩酸、硫酸、硝
酸と弗酸の混酸などが用いられている。2. Description of the Related Art Since stainless steel contains a large amount of elements such as Cr and Ni, it has significantly better corrosion resistance than ordinary steel. This stainless steel sheet is generally manufactured by the following steps. First, the smelted molten steel is made into a slab by a continuous casting facility, heated to a temperature of about 1100 to 1300 ° C., and then hot-rolled. Thereafter, after annealing and pickling, a hot rolled annealed pickled plate is obtained. A part of the hot-rolled annealed pickled plate is used as it is, but most of it is further cold-rolled, finish-annealed and pickled to obtain a cold-rolled product. Of the above steps, pickling of hot-rolled steel sheet was generated on the steel sheet surface in the hot rolling step (Fe
r) This is to remove oxide scale mainly composed of 2 O 3 and (Fe-Cr) 3 O 4. For this pickling, hydrochloric acid, sulfuric acid, or mixed acid of nitric acid and hydrofluoric acid is used. I have.
【０００３】ところで、酸洗に用いられるこれらの酸
は、それ自体はさほど高価ではないが、腐食性が強い。
このために、酸洗設備が必然的に高価になり、その維持
管理費も高価となる。さらに、酸洗後の酸液は有害な金
属イオンを含んだ強酸であるため、廃酸処理にも多大な
コストが必要となる。そこで、光沢などの表面特性があ
まり問題とされない用途に対しては、ステンレス熱延鋼
板の表面にスケールを残したまま使用することができれ
ば、酸洗工程を省略することができ、大幅なコストダウ
ンと廃酸処理の問題を一挙に解決できることになる。[0003] These acids used for pickling are not very expensive per se, but are highly corrosive.
For this reason, the pickling equipment is inevitably expensive, and its maintenance cost is also expensive. Further, since the acid solution after pickling is a strong acid containing harmful metal ions, enormous cost is required for waste acid treatment. Therefore, for applications where surface properties such as gloss are not a major issue, if the stainless steel hot-rolled steel sheet can be used with the scale remaining on the surface, the pickling process can be omitted, resulting in significant cost reduction. Thus, the problem of waste acid treatment can be solved at once.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来か
らの通常の工程で製造されたステンレス熱延鋼板では、
鋼板表面にスケールを有したままの状態では、耐食性が
十分でなく、腐食環境での使用は困難であるという問題
があった。そこで、本発明の目的は、上記既知技術が抱
えていたこれらの問題を解決し、ステンレス鋼の熱間圧
延工程で生成する表面スケールを除去しなくても、優れ
た耐食性を有するステンレス熱延鋼板とその製造方法を
提供することにある。However, in a hot-rolled stainless steel sheet manufactured by a conventional ordinary process,
When the steel sheet surface has the scale, corrosion resistance is not sufficient, and there is a problem that it is difficult to use in a corrosive environment. Therefore, an object of the present invention is to solve these problems of the above-described known technology, and to remove stainless steel hot-rolled surface scales without removing the surface scale, and to provide a stainless hot-rolled steel sheet having excellent corrosion resistance. And a method of manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】さて、発明者らは、上掲
の目的の実現に向けて鋭意研究した結果、ステンレス鋼
の化学成分および熱間圧延における展伸比を適正化し
て、熱延鋼板のスケール構造を制御することによって、
上記目的を達成できることを見いだし、本発明を完成す
るに至った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above-mentioned objects, and as a result, have optimized the chemical composition of stainless steel and the elongation / ratio in hot rolling to obtain a hot-rolled steel. By controlling the scale structure of the steel sheet,
The inventors have found that the above object can be achieved, and have completed the present invention.
【０００６】すなわち、本発明の要旨構成は次のとおり
である。 (1) Cr：10wt％以上、Si：0.5 wt％以上の鋼組成を有す
る熱延鋼板であって、鋼板表面には、厚さ３μｍ以下の
スケール層が形成され、しかも前記スケール層には、下
地合金との界面に、Si濃化層が0.08μｍ以上形成されて
なることを特徴とする耐食性に優れるステンレス熱延鋼
板。That is, the gist of the present invention is as follows. (1) A hot-rolled steel sheet having a steel composition of Cr: 10 wt% or more and Si: 0.5 wt% or more, wherein a scale layer having a thickness of 3 μm or less is formed on the surface of the steel sheet. A hot-rolled stainless steel sheet with excellent corrosion resistance, characterized in that an Si-concentrated layer is formed at the interface with the base alloy at 0.08 μm or more.
【０００７】(2) Cr：10wt％以上、Si：0.5 wt％以上を
含有する鋼スラブを、スラブから熱延鋼帯とへの展伸
比：150 以上にて熱間圧延することを特徴とする上記
(1) に記載のステンレス熱延鋼板の製造方法。(2) A steel slab containing Cr: 10% by weight or more and Si: 0.5% by weight or more is hot-rolled at an expansion ratio of 150 or more from the slab to a hot-rolled steel strip. Above
The method for producing a hot-rolled stainless steel sheet according to (1).
【０００８】[0008]
【発明の実施の形態】発明者らは、種々の成分と熱延条
件で製造された、スケールの構造が異なるステンレス熱
延鋼板を用いて、スケール構造が耐食性へ及ぼす影響に
ついて検討を行った。その結果、スケール厚みが３μｍ
以下、かつこのススケール層には、下地合金との界面
に、Si濃化層が0.08μｍ以上の厚さで形成されている場
合に、良好な耐食性が得られることを見いだした。この
ような構造のスケール層が耐食性を向上させる機構は、
必ずしも明確ではないが、発明者らは主として次の２つ
に集約されると考えている。 スケールが着いたままの熱延鋼板での発銹は、スケー
ル中に金属として存在しているFeを起点として生じる。
スケール厚みを減らすと、このFe量が減り発銹が抑制さ
れる。 Siを含んだスケール皮膜は緻密性および電気絶縁性が
高く、腐食反応にかかわるイオンや電子の拡散を抑制
し、腐食の進行を遅らせる。BEST MODE FOR CARRYING OUT THE INVENTION The inventors examined the effect of the scale structure on corrosion resistance using stainless steel hot rolled steel sheets having different scale structures manufactured under various components and hot rolling conditions. As a result, the scale thickness was 3 μm
Hereinafter, it has been found that good corrosion resistance can be obtained when the Si-concentrated layer is formed at a thickness of 0.08 μm or more at the interface with the underlying alloy in the scale layer. The mechanism by which the scale layer having such a structure improves corrosion resistance is as follows.
Although it is not always clear, the inventors believe that they are mainly classified into the following two. Rust on the hot-rolled steel sheet with the scale attached is generated starting from Fe existing as a metal in the scale.
When the scale thickness is reduced, the amount of Fe decreases and rusting is suppressed. The scale film containing Si has high density and high electrical insulation, suppresses diffusion of ions and electrons involved in the corrosion reaction, and delays the progress of corrosion.
【０００９】さらに、発明者らは、上述したようなスケ
ール構造を得るために必要な鋼成分と熱延条件について
検討した。その結果、スケールの生成量には、スラブか
ら熱延鋼帯への展伸比、すなわち熱延前のスラブと熱延
後の鋼帯との圧延比（（鋼帯の圧延面の面積）／（熱延
前スラブの圧延面の面積）、実際の圧延では（スラブ厚
み）／（熱延板仕上げ厚み）に等しい）の影響が大き
く、展伸比が大きくなればそれに従いスケール厚さは薄
くなり、特に、前記展伸比を150 以上として熱間圧延し
た場合には、スケールの厚さが３μｍ以下になることを
見いだした。このとき、展伸比が大きくなれば、スケー
ル層における下地合金との界面に生成するSiが濃化した
酸化物層も薄くなる。そこで、展伸比150 以上の場合で
も、厚さ0.08μｍ以上のSiが濃化した酸化物層を生成さ
せるための方法についても検討を行い、鋼中のSi量を0.
5 wt％以上含有させることにより解決できることを見い
だした。Further, the inventors have studied the steel components and hot rolling conditions required to obtain the above-described scale structure. As a result, the scale production amount includes the extension ratio from the slab to the hot-rolled steel strip, that is, the rolling ratio between the slab before hot-rolling and the steel strip after hot-rolling ((the area of the rolling surface of the steel strip) / (The area of the rolled surface of the slab before hot rolling) has a large effect in actual rolling (equal to (slab thickness) / (finished thickness of hot rolled sheet)), and the scale thickness becomes thinner as the wrought ratio increases. In particular, it has been found that the thickness of the scale becomes 3 μm or less when hot rolling is performed at an expansion ratio of 150 or more. At this time, if the elongation ratio increases, the oxide layer in which Si is concentrated at the interface between the scale layer and the underlying alloy also becomes thin. Therefore, even when the elongation ratio is 150 or more, a method for generating an oxide layer in which Si is concentrated with a thickness of 0.08 μm or more was also studied, and the amount of Si in steel was reduced to 0.
It has been found that it can be solved by containing 5 wt% or more.
【００１０】次に、本発明について、限定理由を含めて
説明する。 Cr：10wt％以上 Crは、耐食性維持に必要な元素であり、その含有量が10
wt％未満では、ステンレス鋼としての耐食性を具備する
ことができないほか、熱延により生成するスケールが増
加し、本発明に従う方法で製造しても、薄スケール化が
困難となるので10wt％以上含有させる必要がある。な
お、Cr濃度が高くなると熱間加工性が低下すること、高
価になることを考慮して、30wt％を上限とするのが望ま
しい。Next, the present invention will be described including the reasons for limitation. Cr: 10wt% or more Cr is an element necessary for maintaining corrosion resistance, and its content is 10%.
If the content is less than wt%, the corrosion resistance as stainless steel cannot be provided, and the scale generated by hot rolling increases, and it becomes difficult to reduce the thickness even when manufactured by the method according to the present invention. Need to be done. In consideration of the fact that the hot workability decreases and the cost increases when the Cr concentration increases, it is preferable to set the upper limit to 30 wt%.
【００１１】Si：0.5 wt％以上 Siは、スケールの構造と関連する重要な元素である。熱
延時にFe、Crのスケール層と下地合金の界面に耐食性向
上に有効なSiが濃化した酸化物層（主としてSiO2層と考
えられる）を形成する。Si含有量が0.5 wt％未満では本
発明の方法によってもSiが濃化した酸化物層を耐食性に
必要な0.08μｍ以上確保することができないため、0.5
wt％以上含有させる必要がある。なお、3.0 wt％を超え
て含有すると、熱延鋼板の靱性が低下するので、3.0 wt
％を上限とするのが望ましい。Si: 0.5 wt% or more Si is an important element related to the scale structure. At the time of hot rolling, an oxide layer (considered mainly as a SiO 2 layer) containing Si, which is effective for improving corrosion resistance, is formed at the interface between the Fe and Cr scale layers and the base alloy. If the Si content is less than 0.5 wt%, the oxide layer enriched with Si cannot be secured to 0.08 μm or more required for corrosion resistance even by the method of the present invention.
It needs to be contained in wt% or more. If the content exceeds 3.0 wt%, the toughness of the hot-rolled steel sheet decreases.
% Is desirably the upper limit.
【００１２】本発明で対象とするステンレス鋼の成分組
成はそれぞれ常法に沿った範囲であれば良く、特に限定
されるものではない。具体的には、例えば、上記成分の
他に、耐食性を向上させるために 0.1〜5.0 wt％のNi、
鋼中Ｓを固定するために 0.1〜1.5 wt％のMn、脱酸のた
めに 0.001〜0.1 wt％のAl、鋼中のＣ、Ｎの析出固定の
ためにそれぞれ0.01〜0.3 wt％のTi、0.01〜0.5 wt％の
Nb，0.01〜0.2 wt％のZr，0.01〜0.5 wt％のＶなどが含
まれる。またこの他に、耐食性向上のために 0.1〜2.0
wt％のMo，0.1 〜0.5 wt％のCuなどが添加されてもよ
い。The component composition of the stainless steel to be used in the present invention is not particularly limited as long as it is within a range according to a conventional method. Specifically, for example, in addition to the above components, 0.1 to 5.0 wt% Ni in order to improve corrosion resistance,
0.1-1.5 wt% of Mn for fixing S in steel, 0.001-0.1 wt% of Al for deoxidation, 0.01-0.3 wt% of Ti for precipitation and fixing of C and N in steel, respectively. 0.01-0.5 wt%
Nb, 0.01 to 0.2 wt% Zr, 0.01 to 0.5 wt% V, and the like. In addition, 0.1 to 2.0 to improve corrosion resistance
Mo of 0.1 wt%, Cu of 0.1 to 0.5 wt% may be added.
【００１３】スケール構造 前述したように、スケール層の厚さが３μｍを超える
と、その中に金属Feを起点に短時間で発銹するため、ス
ケール層の厚さは３μｍ以下、望ましくは 2.5μｍ以下
に制限する必要がある。また、上記スケール層の一部を
構成し、下地合金との界面に生成する、Siが濃化した酸
化物層の厚さはSi濃化層が0.08μｍ以上とする必要があ
る。この理由は、0.08μｍ未満では腐食の進行が速く、
耐食性が劣るためである。As described above, when the thickness of the scale layer exceeds 3 μm, rust occurs within a short period of time starting from metallic Fe. Therefore, the thickness of the scale layer is 3 μm or less, preferably 2.5 μm. It must be restricted to: Further, the thickness of the oxide layer in which Si is concentrated, which forms a part of the scale layer and is generated at the interface with the underlying alloy, needs to be 0.08 μm or more in the Si-enriched layer. The reason for this is that if it is less than 0.08 μm, the corrosion progresses quickly,
This is because the corrosion resistance is poor.
【００１４】熱間圧延における展伸比 熱間圧延における展伸比は、前記組成を満足するステン
レス鋼スラブを、展伸比を大きくして熱間圧延すること
により、形成されるスケール厚さは薄くなる。この、展
伸比を150 以上とする、大圧下条件で圧延することによ
って、熱延鋼板の表面に生成するスケール厚さを３μｍ
以下に抑制することができる。上述した構造のスケール
層を有する、耐食性に優れるステンレス熱延鋼板を製造
するためには、上記範囲の展伸比で熱間圧延すれば達成
できので、基本的には、そのほかの製造条件については
特に定める必要はないが、好適な条件として以下の条件
が挙げられる。すなわち、スラブ加熱温度は1000〜1250
℃、熱間圧延終了温度は 700〜1100℃、巻き取り温度は
100〜1000℃の範囲である。なお、巻き取り温度が高い
と巻き取り後にスケール厚が増え、また、スケール中の
酸化鉄が金属鉄に還元されて、発銹の起点となるので、
600 ℃以下が好ましい。The elongation ratio in hot rolling The elongation ratio in hot rolling is determined by increasing the elongation ratio of a stainless steel slab satisfying the above-mentioned composition and hot-rolling the scale. Become thin. The scale thickness generated on the surface of the hot-rolled steel sheet by rolling under a large rolling condition with an elongation ratio of 150 or more is 3 μm.
The following can be suppressed. Having a scale layer having the above-described structure, it is possible to manufacture a hot-rolled stainless steel sheet having excellent corrosion resistance by hot rolling at an elongation ratio in the above range. Although it is not necessary to particularly define, the following conditions are mentioned as preferable conditions. That is, the slab heating temperature is 1000-1250
℃, hot rolling end temperature is 700 ~ 1100 ℃, winding temperature is
It is in the range of 100-1000 ° C. If the winding temperature is high, the scale thickness increases after winding, and the iron oxide in the scale is reduced to metallic iron and becomes the starting point of rust.
The temperature is preferably 600 ° C. or lower.
【００１５】[0015]
【実施例】以下、実施例に基づいて、具体的に説明す
る。表１に示す成分組成からなるステンレス鋼スラブ
を、1050〜1150℃に加熱し、圧延終了温度 900〜1050℃
にて、表２に示す種々の条件で熱間圧延して鋼帯とし、
300 〜700 ℃でコイルに巻き取った。The present invention will be specifically described below with reference to examples. A stainless steel slab having the composition shown in Table 1 was heated to 1050 to 1150 ° C, and the rolling end temperature was 900 to 1050 ° C.
In, at various conditions shown in Table 2, hot rolled into a steel strip,
It was wound on a coil at 300-700 ° C.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】得られた熱延鋼板を酸洗することなく、そ
のままの状態で供試材とし、スケールの構造および耐食
性を調査した。スケールの厚さおよびSi濃化層の厚さ
は、熱延鋼板から試料を切り出し、断面を研磨し、ＳＥ
Ｍ観察により求めた。一方、Si濃化層の厚さは、ＳＥＭ
観察およびＡＥＳ分析により、スケール層の組成を同定
し、Siピーク（Si濃度は約２〜30％程度と推定される）
が観察される層の厚さを測定することにより求めた。ま
た、耐食性は、巻き取り後の熱延鋼板から50×100mm の
試験片を切り出し、塩水噴霧試験（ＳＳＴ：ＪＩＳ Ｚ
２３７１、５％NaClを35℃で噴霧）を24時間行ない、試
験後の板面を目視観察して、次の４段階で評価した。 １：発銹なし（発銹面積０％） ２：軽微な発銹がある（発銹面積10％以下） ３：発銹している（発銹面積10％以上30％未満） ４：激しく発銹している（発銹面積30％以上） これらの結果を、表２に併記する。The obtained hot-rolled steel sheet was used as a test material without pickling, and the structure and corrosion resistance of the scale were investigated. The thickness of the scale and the thickness of the Si-enriched layer were determined by cutting a sample from a hot-rolled steel sheet, polishing the cross section,
M was determined by observation. On the other hand, the thickness of the Si-enriched layer is
By observation and AES analysis, the composition of the scale layer was identified, and the Si peak (Si concentration is estimated to be about 2 to 30%)
Was determined by measuring the thickness of the observed layer. The corrosion resistance was determined by cutting a 50 × 100 mm test piece from the rolled hot-rolled steel sheet and performing a salt spray test (SST: JIS Z).
2371, 5% NaCl was sprayed at 35 ° C.) for 24 hours, and the plate surface after the test was visually observed and evaluated according to the following four grades. 1: No rust (rust area 0%) 2: Slight rust (rust area 10% or less) 3: Rust (rust area 10% or more and less than 30%) 4: Violent rust Rust (rust area 30% or more) These results are also shown in Table 2.
【００１９】鋼中Si濃度が0.9 wt％のＡ鋼、1.4 wt％の
Ｂ鋼および0.8 wt％のＣ鋼を、展伸比150 以上で圧延す
ことにより、本発明範囲にあるスケール厚およびSi濃化
層が得られたNo. １、２、５、６および８は、耐食性評
価がいずれも２であり良好な耐食性を示した。これに対
して、Ａ鋼でも展伸比が67や50と低く、スケール厚さが
本発明範囲を外れて厚いNo. ３や４は、耐食性評価は３
あるいは４と悪かった。同じく、Ｂ鋼で展伸比53でスケ
ール厚みが厚いNo. ７も耐食性評価は３で悪かった。ま
た、鋼中Si量が0.3 wt％のＤ鋼および0.2 wt％のＥ鋼
は、展伸比が150 未満ではスケール厚みが３μｍ以上と
なり、また展伸比が150 以上ではSi濃化層の厚みが少な
すぎて、いづれも耐食性評価は３あるいは４と悪かっ
た。このように、本発明に従う熱延鋼板は、いずれも、
酸洗を行うことなく、鋼板表面にスケールを有したまま
で良好な耐食性を示すことが明らかである。A steel having a Si concentration of 0.9 wt%, a B steel having a weight ratio of 1.4 wt% and a C steel having a weight ratio of 0.8 wt% are rolled at an elongation ratio of 150 or more, so that the scale thickness and the Si thickness within the range of the present invention are obtained. Nos. 1, 2, 5, 6, and 8 in which a concentrated layer was obtained had a corrosion resistance evaluation of 2 and showed good corrosion resistance. On the other hand, No. 3 and No. 4 steels with a low elongation ratio of 67 or 50 and a scale thickness out of the range of the present invention are No. 3 or 4, and the corrosion resistance evaluation is 3
Or 4 was bad. Similarly, the No. 7 steel with a scale thickness of 53 and an elongation ratio of 53 had a poor corrosion resistance rating of 3. In the case of steel D having a Si content of 0.3 wt% and steel E having a weight of 0.2 wt%, the scale thickness becomes 3 μm or more when the elongation ratio is less than 150, and the thickness of the Si-enriched layer when the elongation ratio is 150 or more. Was too small, and the corrosion resistance evaluation was as bad as 3 or 4 in any case. Thus, any of the hot-rolled steel sheets according to the present invention,
It is evident that the steel sheet shows good corrosion resistance while having scale on the surface without pickling.
【００２０】[0020]
【発明の効果】以上説明したように、本発明によれば、
従来は、熱延後または熱延焼鈍後に行っていた、酸洗を
省略して、スケールを鋼板表面に残したままでも、優れ
た耐食性を有するステンレス熱延鋼板を提供することが
できる。したがって、本発明によれば、廃酸処理に伴う
問題がなくなり、また酸洗処理に伴うコストが不要とな
るので、低廉なステンレス熱延鋼板を効率よく提供する
ことが可能になり、その工業的な価値は極めて大きい。As described above, according to the present invention,
Conventionally, a hot-rolled stainless steel sheet having excellent corrosion resistance can be provided even if the scale is left on the steel sheet surface without pickling, which has been performed after hot rolling or after hot rolling annealing. Therefore, according to the present invention, problems associated with the waste acid treatment are eliminated, and the cost involved in the pickling treatment is not required, so that it is possible to efficiently provide a low-cost stainless hot-rolled steel sheet, and Value is extremely large.
Claims (2)
成を有する熱延鋼板であって、鋼板表面には、厚さ３μ
ｍ以下のスケール層が形成され、しかも前記スケール層
には、下地合金との界面に、Si濃化層が0.08μｍ以上形
成されてなることを特徴とする耐食性に優れるステンレ
ス熱延鋼板。1. A hot-rolled steel sheet having a steel composition of not less than 10 wt% of Cr and not less than 0.5 wt% of Si, and having a thickness of 3 μm on the surface of the steel sheet.
m. A hot-rolled stainless steel sheet having excellent corrosion resistance, wherein a scale layer having a thickness of not more than m is formed, and a silicon-concentrated layer having a thickness of 0.08 μm or more is formed on the scale layer at an interface with a base alloy.
する鋼スラブを、スラブから熱延鋼帯とへの展伸比：15
0 以上にて熱間圧延することを特徴とする請求項１に記
載のステンレス熱延鋼板の製造方法。2. A steel slab containing Cr: 10% by weight or more and Si: 0.5% by weight or more is stretched from the slab to a hot-rolled steel strip at a draw ratio of 15%.
The method for producing a hot-rolled stainless steel sheet according to claim 1, wherein hot rolling is performed at 0 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24395697A JP3697853B2 (en) | 1997-09-09 | 1997-09-09 | Stainless hot rolled steel sheet excellent in corrosion resistance and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24395697A JP3697853B2 (en) | 1997-09-09 | 1997-09-09 | Stainless hot rolled steel sheet excellent in corrosion resistance and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1180904A true JPH1180904A (en) | 1999-03-26 |
| JP3697853B2 JP3697853B2 (en) | 2005-09-21 |
Family
ID=17111548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24395697A Expired - Lifetime JP3697853B2 (en) | 1997-09-09 | 1997-09-09 | Stainless hot rolled steel sheet excellent in corrosion resistance and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3697853B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022196196A1 (en) * | 2021-03-17 | 2022-09-22 | Ｊｆｅスチール株式会社 | Duplex stainless steel pipe and method for manufacturing same |
-
1997
- 1997-09-09 JP JP24395697A patent/JP3697853B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022196196A1 (en) * | 2021-03-17 | 2022-09-22 | Ｊｆｅスチール株式会社 | Duplex stainless steel pipe and method for manufacturing same |
| JP7173411B1 (en) * | 2021-03-17 | 2022-11-16 | Ｊｆｅスチール株式会社 | Duplex stainless steel pipe and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3697853B2 (en) | 2005-09-21 |
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