JP2005048203A - Duplex stainless steel, its production method, and member for nuclear device - Google Patents

Duplex stainless steel, its production method, and member for nuclear device Download PDF

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Publication number
JP2005048203A
JP2005048203A JP2003203119A JP2003203119A JP2005048203A JP 2005048203 A JP2005048203 A JP 2005048203A JP 2003203119 A JP2003203119 A JP 2003203119A JP 2003203119 A JP2003203119 A JP 2003203119A JP 2005048203 A JP2005048203 A JP 2005048203A
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Japan
Prior art keywords
stainless steel
duplex stainless
phase
heat treatment
producing
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Japanese (ja)
Inventor
Yumiko Abe
由美子 阿部
Fumihisa Kano
文寿 鹿野
Yoshihisa Saito
宣久 斉藤
Kazuyoshi Kataoka
一芳 片岡
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Toshiba Corp
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Toshiba Corp
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Priority to JP2003203119A priority Critical patent/JP2005048203A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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Abstract

<P>PROBLEM TO BE SOLVED: To provide duplex stainless steel having an austenitic phase and a ferritic phase, high in strength and corrosion resistance, and suitable for use in a radiation environment, to provide its production method, and to provide a member for a nuclear device. <P>SOLUTION: The duplex stainless steel has an austenitic phase and a ferritic phase, and in which the equivalent of Cr and the equivalent of Ni comprised as components lie in the boundary part between the dual phase of the austenitic phase and the ferritic phase and the austenitic single phase in Schaeffler's diagram, and the crystal grains are made minute. The duplex stainless steel is produced in such a manner that cold working (a) and (d) and heat treatment (b), (c), (e) and (f) are controlled, and the coarsening of the crystal grains is suppressed by the precipitation of the ferritic phase. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、オーステナイト相とフェライト相を有する２相ステンレス鋼およびその製造方法および前記２相ステンレス鋼を用いた原子力装置用部材に関する。
【０００２】
【従来の技術】
軽水炉プラントもしくは原子力プラントより発生する廃棄物を処理する施設等の環境は、中性子照射による放射線環境下となるため、このような原子力施設に使用されているオーステナイトステンレス鋼等は、使用が長期にわたると、ボイド発生等による強度および延性の低下や偏析誘起による粒界部Ｃｒ等の濃度低下から生じる耐食性低下および粒界割れが発生する。これらの現象は、改良材を適用してもなお発生しており、対策は十分とは言い難く、プラントの長寿命化への懸念材料のひとつとなっている。
【０００３】
また、現在、超臨界圧水軽水炉を代表とする高温・高圧によって熱効率向上を目指した原子力プラントの実用化が検討されており、その適用温度は２９０℃から５５０℃、圧力は２５ＭＰａと厳しい環境となる。しかし、従来の軽水炉プラントに使用されている構造材料および燃料被覆管材料の高温強度は、温度が５５０℃以上になると急激に低下するため、超臨界圧水軽水炉等における使用は困難である。さらに、水の密度が低下するため中性子密度がより高い環境となるため、粒界偏析による耐食性低下も懸念される。従って、高温強度および耐食性を向上させた改良材の開発が望まれている。
【０００４】
一方、オーステナイトステンレス鋼の高温強度および耐食性を高める手法としては、結晶粒の微細化が挙げられる。一般的な微細化の手段は、冷間加工→熱処理（再結晶化）→冷却である（下記特許文献１，２，３参照）。微細化を促進させるために最も効果的な方法は冷間加工率をできるだけ高くすることであるが、冷間加工率の上昇は材料の厚さを制限することになり、加工できる製品も限られるという難点が生じる。そのため、冷間加工率を上げずに結晶粒の微細化を促進させる手段を検討する必要がある。
【０００５】
【特許文献１】
特開２０００−２７３５３８号公報
【特許文献２】
特開２００１−３２０４５号公報
【特許文献３】
特開２００２−２５６４００号公報
【０００６】
【発明が解決しようとする課題】
本発明は、オーステナイト相とフェライト相を有し、強度と耐食性が高く、放射線環境下での使用に適した２相ステンレス鋼およびその製造方法および原子力装置用部材を提供することを目的とする。
【０００７】
【課題を解決するための手段】
請求項１の発明は２相ステンレス鋼であり、オーステナイト相およびフェライト相を有し、成分として含まれるＣｒ当量およびＮｉ当量が、シェフラーの組織図においてオーステナイト相とフェライト相の複相とオーステナイト相単相の境界部にあり結晶粒が微細化されている構成とする。
【０００８】
請求項２の発明は、請求項１の発明において、重量比１．５％以下のＴｉ、または重量比１．５％以下のＮｂ、または重量比１．５％以下のＺｒの少なくともいずれか１種類を含有する構成とする。
【０００９】
請求項３の発明は、請求項１に記載の２相ステンレス鋼の製造方法において、冷間加工と熱処理の制御により、結晶粒粗大化をフェライト相の析出によって抑制する方法とする。
【００１０】
請求項４の発明は、請求項３の発明において、冷間加工を４０％以上として制御する方法とする。
請求項５の発明は、請求項３の発明において、熱処理温度を８００℃以上１１００℃以下として制御する方法とする。
【００１１】
請求項６の発明は、請求項３の発明において、熱処理後の冷却速度を制御することによって粒界部のＣｒ濃度を濃縮させる方法とする。
請求項７の発明は、請求項３の発明において、熱処理後の冷却速度を１℃／秒ないし５０℃／秒に制御する方法とする。
【００１２】
請求項８の発明は原子力装置用部材であり、請求項１に記載の２相ステンレス鋼によって形成され、燃料被覆管、または軽水炉炉内構造物または配管、または軽水炉、または廃棄物処理装置の少なくとも一部分を構成する構成とする。
【００１３】
【発明の実施の形態】
図１，２，３を参照して本発明の実施の形態を説明する。
本実施の形態の２相ステンレス鋼は、冷間加工と熱処理の制御により、結晶粒粗大化をフェライト相の析出によって抑制した、オーステナイト相およびフェライト相を持つ結晶粒微細化ステンレス鋼である。
【００１４】
図１にシェフラーの組織図を示す。本実施の形態では、オーステナイト相およびフェライト相を持つ２相ステンレス鋼において、フェライト相を分散析出させることによって、オーステナイト相の粒径粗大化を防ぐ。そのため、フェライト相の含有量は少ない方が望ましく、製造にあたっては図１をもとにオーステナイト相に近い２相ステンレス鋼になるようにＣｒ当量およびＮｉ当量を決定する。分散析出したフェライト相は、結晶粒成長を抑制もしくは阻止するピン止め効果を発揮し、微細化が促進される。
【００１５】
図２に、オーステナイト相およびフェライト相を持つ本実施の形態の２相ステンレス鋼の冷間加工と熱処理を制御して組織を微細化させる製造工程を示す。鋼の製造は、１回目の微細化工程と２回目の微細化または１回目の微細化工程と２回目の微細化およびＣｒ濃度濃縮工程で行う。
【００１６】
図１をもとに製作した２相ステンレス鋼の材料１を冷間圧延機２にかけ冷間加工４０％以上となるように圧延する（ａ）。冷間加工した材料１を電気炉３において温度８００℃〜１１００℃まで加熱し保持（ｂ）した後、電気炉３を開けて空冷もしくは材料１を取り出し水冷を行い冷却する（ｃ）。ここまでを一回目の微細化工程とする。次に、冷却した材料１を再度、冷間圧延機２にかけ、一回目の冷間加工率と同等もしくはそれ以上の冷間加工を行い（ｄ）、電気炉３に入れ、温度８００℃〜１０５０℃まで加熱し保持（ｅ）した後冷却を行う。
【００１７】
粒界部のＣｒ濃度濃縮を実施する場合は、電気炉３の加熱制御とファン４を用いて材料１の冷却速度制御を行う（ｆ）。冷却速度は、粒界部Ｃｒ濃度を上げるために、温度８００℃から５００℃の間を１℃／秒から５０℃／秒とする。これらが第２回目の微細化処理と粒界部Ｃｒ濃度濃縮工程となる。これによって、材料１の粒度は微細化され、かつ粒界部のＣｒ濃度の濃縮が行われ、強度および耐食性が改善された材料が製造される。
【００１８】
製造工程に含まれる冷間加工は結晶粒微細化促進効果とともに、加工によって入った歪によってフェライト相が析出しやすくし、分散化促進効果もある。また、２相ステンレス鋼の材料１には、あらかじめ、重量比１．５％以下のＴｉ、ＮｂおよびＺｒを１種類または２種類以上添加しておくとさらに強度および耐食性が向上する。同時に、Ｔｉ、ＮｂおよびＺｒは、析出した元素および相を捕獲する性質があるため、フェライト相分散析出効果が得られる。
【００１９】
図３に本実施の形態の２相ステンレス鋼の組織写真を示す。写真（ａ）はＦｅ−１５Ｎｉ−２５Ｃｒ合金で、写真（ｂ）はＦｅ−１５Ｎｉ−２５Ｃｒ−Ｔｉ−Ｚｒ合金である。粒径は９〜１０μｍであり、微細化されていることがわかる。
【００２０】
本実施の形態の２相ステンレス鋼は、原子力プラントの燃料被覆管や、炉内機器や、配管や、高温高圧化によって熱効率を向上させた軽水炉に適用することができる。
【００２１】
本実施の形態によれば、冷間加工および熱処理の制御という非常に簡便な手段で、高温強度および耐食性を向上させた２相ステンレス鋼を製作することができる。すなわち、フェライト相の分散析出により、粒径微細化したステンレス鋼が得られるとともに、微細化かつ粒界部のＣｒ濃縮を行うことによって、高温強度および耐食性を高めた材料を得ることができる。また、Ｔｉ、ＮｂおよびＺｒの添加によって、より効果的に微細化および耐食性を向上させることができる。そして、本実施の形態の２相ステンレス鋼を使用すれば、軽水炉プラントおよび廃棄物処理システムの構造部材の健全性を長期間維持した安全な運転を行うことが可能になる。
【００２２】
【発明の効果】
本発明によれば、オーステナイト相とフェライト相を有し、強度と耐食性が高く、放射線環境下での使用に適した２相ステンレス鋼およびその製造方法および原子力装置用部材を提供することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態を説明するシェフラーの組織図。
【図２】Ｃｒを含む鉄鋼材料の冷間加工と熱処理を制御して、組織の微細化および粒界部の成分元素濃度を濃縮させる本発明の実施の形態の製造工程を説明する図。
【図３】フェライト相を分散析出させた本発明の実施の形態の２相ステンレス鋼の組織写真。
【符号の説明】
１…材料、２…冷間圧延機、３…電気炉、４…熱電対、５…温度測定器、６…ファン。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a duplex stainless steel having an austenite phase and a ferrite phase, a method for producing the duplex stainless steel, and a nuclear device member using the duplex stainless steel.
[0002]
[Prior art]
Because the environment of facilities that treat waste generated from light water reactor plants or nuclear power plants is in a radiation environment due to neutron irradiation, austenitic stainless steel used in such nuclear facilities should be used for a long time. In addition, a decrease in strength and ductility due to void generation or the like, and a decrease in corrosion resistance and a grain boundary crack resulting from a decrease in the concentration of grain boundary portion Cr due to segregation induction occur. These phenomena still occur even when the improved material is applied, and it is difficult to say that countermeasures are sufficient, and this is one of the concerns for extending the plant life.
[0003]
Currently, the practical application of nuclear power plants aiming at improving the thermal efficiency by high temperature and high pressure represented by the supercritical water reactor is being studied, and its application temperature is from 290 ° C to 550 ° C, and the pressure is 25 MPa. Become. However, the high-temperature strength of structural materials and fuel cladding materials used in conventional light water reactor plants rapidly decreases when the temperature reaches 550 ° C. or higher, making it difficult to use in supercritical water reactors. Furthermore, since the density of water decreases and the environment becomes higher in neutron density, there is a concern that the corrosion resistance is reduced due to grain boundary segregation. Therefore, development of an improved material having improved high temperature strength and corrosion resistance is desired.
[0004]
On the other hand, as a technique for increasing the high-temperature strength and corrosion resistance of austenitic stainless steel, there is a refinement of crystal grains. A general means of miniaturization is cold working → heat treatment (recrystallization) → cooling (see Patent Documents 1, 2, and 3 below). The most effective way to promote miniaturization is to increase the cold working rate as much as possible, but increasing the cold working rate will limit the thickness of the material and limit the products that can be processed. The difficulty that arises. Therefore, it is necessary to examine means for promoting the refinement of crystal grains without increasing the cold working rate.
[0005]
[Patent Document 1]
JP 2000-273538 A [Patent Document 2]
Japanese Patent Laying-Open No. 2001-32045 [Patent Document 3]
Japanese Patent Laid-Open No. 2002-256400 [0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a duplex stainless steel having an austenite phase and a ferrite phase, having high strength and corrosion resistance, and suitable for use in a radiation environment, a method for producing the same, and a member for a nuclear device.
[0007]
[Means for Solving the Problems]
The invention of claim 1 is a duplex stainless steel, which has an austenite phase and a ferrite phase, and the Cr equivalent and Ni equivalent contained as components are a double phase of the austenite phase and the ferrite phase and a single austenite phase in the Schaeffler structure diagram. The structure is such that the crystal grains are refined at the phase boundary.
[0008]
According to a second aspect of the present invention, in the first aspect of the invention, at least one of Ti having a weight ratio of 1.5% or less, Nb having a weight ratio of 1.5% or less, or Zr having a weight ratio of 1.5% or less. It is set as the structure containing a kind.
[0009]
A third aspect of the invention is a method for producing a duplex stainless steel according to the first aspect of the present invention, wherein the grain coarsening is suppressed by precipitation of a ferrite phase by controlling cold working and heat treatment.
[0010]
The invention of claim 4 is the method of controlling cold working as 40% or more in the invention of claim 3.
The invention according to claim 5 is the method according to claim 3, wherein the heat treatment temperature is controlled to be 800 ° C. or higher and 1100 ° C. or lower.
[0011]
The invention of claim 6 is a method of concentrating the Cr concentration in the grain boundary part by controlling the cooling rate after the heat treatment in the invention of claim 3.
The invention according to claim 7 is the method according to claim 3, wherein the cooling rate after the heat treatment is controlled to 1 ° C./second to 50 ° C./second.
[0012]
The invention of claim 8 is a member for nuclear power equipment, which is formed of the duplex stainless steel according to claim 1, and is at least a fuel cladding tube, a light water reactor internal structure or piping, a light water reactor, or a waste treatment device. A part of the structure is used.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
The duplex stainless steel of the present embodiment is a grain refined stainless steel having an austenite phase and a ferrite phase, in which grain coarsening is suppressed by precipitation of a ferrite phase by controlling cold working and heat treatment.
[0014]
Fig. 1 shows the organization chart of Schaeffler. In this embodiment, in a duplex stainless steel having an austenite phase and a ferrite phase, the ferrite phase is dispersed and precipitated to prevent the austenite phase from becoming coarse. For this reason, it is desirable that the content of the ferrite phase is small. In production, the Cr equivalent and the Ni equivalent are determined based on FIG. 1 so as to obtain a duplex stainless steel close to the austenite phase. The dispersed and precipitated ferrite phase exhibits a pinning effect that suppresses or prevents crystal grain growth and promotes refinement.
[0015]
FIG. 2 shows a manufacturing process in which the microstructure is refined by controlling cold working and heat treatment of the duplex stainless steel of this embodiment having an austenite phase and a ferrite phase. Steel is manufactured in the first refinement process and the second refinement process, or the first refinement process, the second refinement process, and the Cr concentration concentration process.
[0016]
The material 1 of the duplex stainless steel produced based on FIG. 1 is rolled in a cold rolling machine 2 so that the cold working is 40% or more (a). After the cold-worked material 1 is heated and held (b) in the electric furnace 3 to a temperature of 800 ° C. to 1100 ° C., the electric furnace 3 is opened and air cooling or the material 1 is taken out and cooled by water cooling (c). This is the first miniaturization step. Next, the cooled material 1 is again applied to the cold rolling mill 2 to perform cold working equivalent to or higher than the first cold working rate (d), put into the electric furnace 3, and temperature 800 ° C. to 1050 After cooling to 0 ° C. and holding (e), cooling is performed.
[0017]
When carrying out the concentration of Cr at the grain boundary, the heating control of the electric furnace 3 and the cooling rate control of the material 1 are performed using the fan 4 (f). The cooling rate is 1 ° C./second to 50 ° C./second between 800 ° C. and 500 ° C. in order to increase the grain boundary Cr concentration. These are the second refinement process and the grain boundary Cr concentration concentration process. As a result, the particle size of the material 1 is refined, and the Cr concentration at the grain boundary is concentrated to produce a material with improved strength and corrosion resistance.
[0018]
The cold working included in the manufacturing process has a crystal grain refinement promoting effect, a ferrite phase easily precipitates due to strains caused by the processing, and has a dispersion promoting effect. Further, when one or more of Ti, Nb and Zr having a weight ratio of 1.5% or less are added to the material 1 of the duplex stainless steel in advance, the strength and corrosion resistance are further improved. At the same time, since Ti, Nb and Zr have the property of capturing the precipitated elements and phases, the effect of ferrite phase dispersion and precipitation can be obtained.
[0019]
FIG. 3 shows a structure photograph of the duplex stainless steel of the present embodiment. The photograph (a) is an Fe-15Ni-25Cr alloy, and the photograph (b) is an Fe-15Ni-25Cr-Ti-Zr alloy. It can be seen that the particle size is 9 to 10 μm, which is miniaturized.
[0020]
The duplex stainless steel of the present embodiment can be applied to a fuel cladding tube of a nuclear power plant, in-reactor equipment, piping, and a light water reactor whose thermal efficiency is improved by increasing the temperature and pressure.
[0021]
According to the present embodiment, duplex stainless steel with improved high-temperature strength and corrosion resistance can be produced by a very simple means of cold working and heat treatment control. That is, a stainless steel with a refined grain size can be obtained by dispersing and precipitating the ferrite phase, and a material with improved high temperature strength and corrosion resistance can be obtained by refining and concentrating Cr at the grain boundary. Further, the addition of Ti, Nb and Zr can more effectively reduce the size and improve the corrosion resistance. And if the duplex stainless steel of this Embodiment is used, it will become possible to perform the safe driving | running which maintained the soundness of the structural member of a light water reactor plant and a waste disposal system for a long period of time.
[0022]
【The invention's effect】
According to the present invention, it is possible to provide a duplex stainless steel having an austenite phase and a ferrite phase, having high strength and corrosion resistance, and suitable for use in a radiation environment, a method for producing the same, and a member for a nuclear device.
[Brief description of the drawings]
FIG. 1 is an organization chart of Schaeffler explaining an embodiment of the present invention.
FIG. 2 is a diagram for explaining a manufacturing process according to an embodiment of the present invention in which cold working and heat treatment of a steel material containing Cr are controlled to refine a structure and concentrate a concentration of component elements in a grain boundary part.
FIG. 3 is a structural photograph of a duplex stainless steel according to an embodiment of the present invention in which a ferrite phase is dispersed and precipitated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Material, 2 ... Cold rolling mill, 3 ... Electric furnace, 4 ... Thermocouple, 5 ... Temperature measuring device, 6 ... Fan.

Claims (8)

オーステナイト相およびフェライト相を有し、成分として含まれるＣｒ当量およびＮｉ当量が、シェフラーの組織図においてオーステナイト相とフェライト相の複相とオーステナイト相単相の境界部にあり結晶粒が微細化されていることを特徴とする２相ステンレス鋼。There is an austenite phase and a ferrite phase, and the Cr equivalent and Ni equivalent contained as components are at the boundary between the austenite phase and the ferrite phase double phase and the austenite phase single phase in the Schaeffler structure diagram. A duplex stainless steel characterized by 重量比１．５％以下のＴｉ、または重量比１．５％以下のＮｂ、または重量比１．５％以下のＺｒの少なくともいずれか１種類を含有することを特徴とする請求項１に記載の２相ステンレス鋼。2. The composition according to claim 1, comprising at least one of Ti having a weight ratio of 1.5% or less, Nb having a weight ratio of 1.5% or less, or Zr having a weight ratio of 1.5% or less. Duplex stainless steel. 請求項１に記載の２相ステンレス鋼において、冷間加工と熱処理の制御により、結晶粒粗大化をフェライト相の析出によって抑制することを特徴とする２相ステンレス鋼の製造方法。The method for producing a duplex stainless steel according to claim 1, wherein coarsening of the crystal grains is suppressed by precipitation of a ferrite phase by controlling cold working and heat treatment. 冷間加工を４０％以上として制御することを特徴とする請求項３に記載の２相ステンレス鋼の製造方法。The method for producing a duplex stainless steel according to claim 3, wherein the cold working is controlled to be 40% or more. 熱処理温度を８００℃以上１１００℃以下として制御することを特徴とする請求項３に記載の２相ステンレス鋼の製造方法。The method for producing a duplex stainless steel according to claim 3, wherein the heat treatment temperature is controlled to be 800 ° C or higher and 1100 ° C or lower. 熱処理後の冷却速度を制御することによって粒界部のＣｒ濃度を濃縮させることを特徴とする請求項３に記載の２相ステンレス鋼の製造方法。The method for producing a duplex stainless steel according to claim 3, wherein the Cr concentration in the grain boundary part is concentrated by controlling a cooling rate after the heat treatment. 熱処理後の冷却速度を１℃／秒ないし５０℃／秒に制御することを特徴とする請求項３に記載の２相ステンレス鋼の製造方法。The method for producing a duplex stainless steel according to claim 3, wherein a cooling rate after the heat treatment is controlled to 1 ° C / second to 50 ° C / second. 請求項１に記載の２相ステンレス鋼によって形成され、燃料被覆管、または軽水炉炉内構造物または配管、または軽水炉、または廃棄物処理装置の少なくとも一部分を構成することを特徴とする原子力装置用部材。A nuclear power plant member formed of the duplex stainless steel according to claim 1 and constituting at least a part of a fuel cladding tube, a light water reactor internal structure or piping, a light water reactor, or a waste treatment device. .
JP2003203119A 2003-07-29 2003-07-29 Duplex stainless steel, its production method, and member for nuclear device Pending JP2005048203A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008170300A (en) * 2007-01-12 2008-07-24 Toshiba Corp Fuel cladding tube, its manufacturing method, and fuel rod
CN111918979A (en) * 2018-03-30 2020-11-10 杰富意钢铁株式会社 Duplex stainless steel clad steel sheet and method for manufacturing same
CN112893790A (en) * 2021-01-18 2021-06-04 燕山大学 Cast-rolling short-process-based uniform and fine duplex stainless steel thin strip and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008170300A (en) * 2007-01-12 2008-07-24 Toshiba Corp Fuel cladding tube, its manufacturing method, and fuel rod
JP4592709B2 (en) * 2007-01-12 2010-12-08 株式会社東芝 Fuel cladding tube, manufacturing method thereof, and fuel rod
CN111918979A (en) * 2018-03-30 2020-11-10 杰富意钢铁株式会社 Duplex stainless steel clad steel sheet and method for manufacturing same
CN111918979B (en) * 2018-03-30 2022-01-18 杰富意钢铁株式会社 Duplex stainless steel clad steel sheet and method for manufacturing same
CN112893790A (en) * 2021-01-18 2021-06-04 燕山大学 Cast-rolling short-process-based uniform and fine duplex stainless steel thin strip and preparation method thereof

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