JPH06220544A - Production of cr-ni series stainless steel thin sheet excellent in surface quality - Google Patents
Production of cr-ni series stainless steel thin sheet excellent in surface qualityInfo
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- JPH06220544A JPH06220544A JP1161193A JP1161193A JPH06220544A JP H06220544 A JPH06220544 A JP H06220544A JP 1161193 A JP1161193 A JP 1161193A JP 1161193 A JP1161193 A JP 1161193A JP H06220544 A JPH06220544 A JP H06220544A
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- Prior art keywords
- thin
- stainless steel
- cold
- rolling
- slab
- Prior art date
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- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、１８％Ｃｒ−８％Ｎｉ
鋼に代表されるＣｒ−Ｎｉ系ステンレス鋼を板厚１０mm
以下の薄肉鋳片に鋳造し、該薄肉鋳片を冷間圧延して薄
板製品とするプロセスにおいて、表面品質の優れたＣｒ
−Ｎｉ系ステンレス鋼薄板を製造する方法に関する。近
年、溶鋼から鋳造によって直接的に厚さ１０mm以下の薄
帯を得る技術が開発され工業的生産がなされるに至って
いる。新しいこの技術によれば、スラブを熱間圧延して
薄帯とする工程を省略でき、省エネルギー、製造コスト
削減の点で大きな効果をもたらす。以後、本発明におい
ては溶鋼から鋳造によって直接的に厚さ１０mm以下の薄
鋳片を鋳造し、該鋳片を冷延焼鈍して薄板製品を製造す
るプロセスをＳＴＣ（Strip Casting)プロセスと称す
る。又、スラブを熱間圧延して熱延鋼帯とし、該熱延鋼
帯を冷延焼鈍して薄板製品を得るプロセスを現行熱延プ
ロセスと称する。This invention relates to 18% Cr-8% Ni.
Cr-Ni type stainless steel typified by steel with a plate thickness of 10 mm
In the process of casting into the following thin-walled slab and cold-rolling the thin-walled slab into a thin plate product, Cr having excellent surface quality is used.
-A method for producing a Ni-based stainless steel sheet. In recent years, a technique for directly obtaining a thin strip having a thickness of 10 mm or less from molten steel by casting has been developed and industrial production has been achieved. According to this new technology, the step of hot-rolling the slab into a ribbon can be omitted, and a great effect can be brought about in terms of energy saving and manufacturing cost reduction. Hereinafter, in the present invention, a process of directly casting a thin slab having a thickness of 10 mm or less from molten steel and cold-rolling and annealing the slab to produce a thin plate product is referred to as an STC (Strip Casting) process. Further, a process of hot rolling a slab into a hot rolled steel strip, and cold rolling and annealing the hot rolled steel strip to obtain a thin plate product is referred to as a current hot rolling process.
【０００２】[0002]
【従来の技術】従来、１８％Ｃｒ−８％Ｎｉ鋼に代表さ
れるＣｒ−Ｎｉ系ステンレス鋼薄板製品をＳＴＣプロセ
スで製造すると、製品表面に肌荒れ（オレンジピール或
はローピングと呼ばれる）が生じて、問題になってい
た。2. Description of the Related Art Conventionally, when a Cr-Ni type stainless steel thin plate product represented by 18% Cr-8% Ni steel is manufactured by the STC process, the surface of the product is roughened (called orange peel or roping). It was a problem.
【０００３】例えば、「日新製鋼技法」第６２号（１９
９０）、ｐ６２〜７８において、現行の熱延焼鈍板に比
べて薄鋳片のγ粒が粗大であり、結晶粒ごとの変形能の
違いが冷延板表面に現れたものがローピングであり、そ
の防止対策としては適切な温度、圧延率で圧延を行い、
その後、焼鈍することで鋳片のγ粒径を４０μｍ以下に
し、その後に冷間圧延する方法が述べられている。For example, "Nisshin Steel Making Technique", No. 62 (19)
90), p62 to 78, the γ grain of the thin cast piece is coarse compared to the current hot-rolled annealed sheet, and the difference in deformability between the crystal grains appears on the cold-rolled sheet surface is roping, As a preventive measure, rolling at an appropriate temperature and rolling rate,
After that, a method is described in which the γ grain size of the slab is reduced to 40 μm or less by annealing, and then cold rolling is performed.
【０００４】しかし、圧延を２回に分けて行う事は生産
コストを増加させる問題があり、また、熱間で圧延を行
うためには専用の熱延設備を造る必要が生じる等の問題
があり、ローピングの改善策として好ましいものではな
かった。[0004] However, there are problems that the production cost is increased when the rolling is performed twice, and that a dedicated hot rolling equipment is required to perform the hot rolling. However, it was not a preferable measure for improving roping.
【０００５】本発明者らは、ＳＴＣプロセスによる表面
品質の優れたＣｒ−Ｎｉ系ステンレス鋼薄板の製造方法
として、冷間圧延時における結晶粒ごとの変形能の違い
を小さくすることで、ローピングは改善されると考え、
Ｃｒ−Ｎｉ系ステンレス鋼の成分をＭｄ３０が３０〜５
０℃になるように調製し、冷延時におけるマルテンサイ
ト変態が鋳片のほとんどの結晶粒において起こるように
し、各結晶粒の変形能の均一化を計る技術を既に出願し
ている。この発明では、鋳片の結晶粒径が粗大でもロー
ピングを低減できることを特徴としていた。The inventors of the present invention, as a method for producing a Cr-Ni type stainless steel thin plate having an excellent surface quality by the STC process, reduce the difference in deformability between crystal grains at the time of cold rolling to reduce roping. Thought to be improved,
Md30 of Cr-Ni stainless steel is 30 to 5
A technology has already been applied for that the temperature is adjusted to 0 ° C., the martensite transformation during cold rolling occurs in most of the crystal grains of the slab, and the deformability of each crystal grain is made uniform. The present invention is characterized in that roping can be reduced even if the crystal grain size of the slab is large.
【０００６】[0006]
【発明が解決しようとする課題】本発明者らは上記発明
に従ってＣｒ−Ｎｉ系ステンレス鋼薄板を実機生産設備
において製造したが、生産ラインごとにローピングがば
らつき、安定してローピングの無い薄板製品を製造する
ことが困難であった。そこで、安定してローピングの無
い薄板製品を製造する技術が必要となった。本発明はか
ゝる製造技術の課題を解決することを目的とする。The inventors of the present invention have produced Cr-Ni type stainless steel thin plates in accordance with the above-mentioned invention in an actual production facility. However, roping varies depending on the production line and stable thin plate products without roping are produced. It was difficult to manufacture. Therefore, there has been a need for a technology for stably manufacturing thin plate products without roping. The present invention aims to solve the problems of such manufacturing techniques.
【０００７】[0007]
【課題を解決するための手段】本発明は上記目的を達成
するため次のような構成とした。その要旨は、Ｃｒ−
Ｎｉ系ステンレス鋼から板厚１０mm以下の薄肉鋳片を鋳
造し、該薄肉鋳片を冷間圧延、焼鈍して薄板製品とする
Ｃｒ−Ｎｉ系ステンレス鋼薄板の製造方法において、前
記薄肉鋳片のＣｒ−Ｎｉ系ステンレス鋼成分のＭｄ３０
（Ｍｄ３０＝４１３−４６２（Ｃ＋Ｎ）−９．２Ｓｉ−
８．１Ｍｎ−１３．７Ｃｒ−１８．５Ｍｏ−９．１（Ｎ
ｉ＋Ｃｕ） （成分は重量％））を３０〜５０℃とする
とともに、該薄肉鋳片を冷間圧延する際に全圧下率の８
０％以上を１００〜２００℃の温度域で圧延し、該冷延
板に必要により０．３kg／mm2 以上の張力をかけ、該冷
延板を１０００〜１２００℃の温度域で焼鈍することを
特徴とするＣｒ−Ｎｉ系ステンレス鋼薄板の製造方法、
及びThe present invention has the following constitution in order to achieve the above object. The summary is Cr-
In a method for producing a Cr-Ni-based stainless steel thin plate, which comprises casting a thin cast product having a plate thickness of 10 mm or less from Ni-based stainless steel, and cold rolling and annealing the thin cast product, the thin cast product Cr-Ni system stainless steel composition Md30
(Md30 = 413-462 (C + N) -9.2Si-
8.1Mn-13.7Cr-18.5Mo-9.1 (N
i + Cu) (components are wt%)) is set to 30 to 50 ° C., and the total rolling reduction is 8 when cold rolling the thin cast piece.
Rolling 0% or more in a temperature range of 100 to 200 ° C., applying a tension of 0.3 kg / mm 2 or more to the cold rolled sheet if necessary, and annealing the cold rolled sheet in a temperature range of 1000 to 1200 ° C. A method for producing a Cr-Ni-based stainless steel thin plate,
as well as
【０００８】Ｃｒ−Ｎｉ系ステンレス鋼から板厚１０
mm以下の薄肉鋳片を鋳造し、該薄肉鋳片を冷間圧延、焼
鈍して薄板製品とするＣｒ−Ｎｉ系ステンレス鋼薄板の
製造方法において、前記薄肉鋳片のＣｒ−Ｎｉ系ステン
レス鋼成分の前記Ｍｄ３０を３０〜５０℃とするととも
に、該薄肉鋳片を冷間圧延した後に、該冷延板に０．３
kg／mm2 以上の張力をかけつゝ１０００〜１１５０℃の
温度域で焼鈍することを特徴とするＣｒ−Ｎｉ系ステン
レス鋼薄板の製造方法にある。Plate thickness of 10 from Cr-Ni type stainless steel
In a method for producing a Cr-Ni-based stainless steel thin plate in which a thin-walled slab having a thickness of mm or less is cast, and the thin-walled slab is cold-rolled and annealed to obtain a thin plate product, a Cr-Ni-based stainless steel component of the thin-walled slab Md30 of 30 ~ 50 ℃, and after cold rolling the thin-walled slab, 0.3
A method for producing a Cr-Ni-based stainless steel thin plate is characterized in that it is annealed in a temperature range of 1000 to 1150 ° C while applying a tension of kg / mm 2 or more.
【０００９】[0009]
【作用】成分のＭｄ３０を３０〜５０℃としたＣｒ−Ｎ
ｉ系ステンレス鋼薄鋳片は冷間圧延時にはローピングが
生じないが、冷延板を焼鈍した際に肌荒れが発生するこ
とがある。この現象は、冷間圧延によって生じた加工誘
起マルテンサイト組織が焼鈍過程でオーステナイトに逆
変態することによって体積変化が生じ、表面に凹凸が生
じた結果と考えられる。従来の熱延プロセスでは、結晶
粒が小さいため、逆変態による体積変化も細かい単位で
発生し目立たなかった。また、ＳＴＣプロセスにおいて
もＭｄ３０が小さい場合は結晶粒は大きいが、逆変態す
る量が少ないために目立たなかったと考えられる。Function: Cr-N whose component Md30 is 30 to 50 ° C
Although the i-type stainless steel thin slab does not undergo roping during cold rolling, rough skin may occur when the cold rolled sheet is annealed. This phenomenon is considered to be a result of volume change caused by the reverse transformation of the work-induced martensite structure generated by cold rolling to austenite in the annealing process, resulting in surface irregularities. In the conventional hot rolling process, since the crystal grains were small, the volume change due to the reverse transformation occurred in small units and was not conspicuous. Also in the STC process, when Md30 is small, the crystal grains are large, but it is considered that it was not noticeable because the amount of reverse transformation is small.
【００１０】この様な逆変態による肌荒れは、焼鈍過程
における昇温中に発生するものであり、逆変態のドライ
ビングフォースの大小によって、逆変態の起こる温度域
が異なるために発生すると考えられる。そこで、本発明
者らは鋳片の冷間圧延条件と焼鈍条件が冷延焼鈍板のロ
ーピングに及ぼす影響について調査を行って来た。その
結果、冷間圧延温度と冷延板焼鈍時の張力が、冷延焼鈍
板のローピングに大きく影響することを見い出し、本発
明を完成させた。以下に、本発明において成分及び冷延
条件、焼鈍条件を限定した理由について述べる。Such rough skin due to reverse transformation occurs during the temperature rise in the annealing process, and is considered to occur because the temperature range in which reverse transformation occurs varies depending on the driving force of the reverse transformation. Therefore, the present inventors have investigated the influence of the cold rolling condition and the annealing condition of the slab on the roping of the cold rolled annealed sheet. As a result, they found that the cold rolling temperature and the tension during annealing of the cold-rolled sheet greatly influence the roping of the cold-rolled annealed sheet, and completed the present invention. The reasons for limiting the components, cold rolling conditions, and annealing conditions in the present invention will be described below.
【００１１】Ｍｄ３０：３０〜５０℃について；Ｃｒ−
Ｎｉ系ステンレス鋼薄鋳片の冷延後のローピングはＭｄ
３０に大きく影響される。即ち、本発明者らの実験で、
Ｍｄ３０を変化させた種々のＣｒ−Ｎｉ系ステンレス鋼
をツインドラム鋳造機で板厚３mmの薄鋳片に鋳造しデス
ケール後、１２０℃で５０％の冷間圧延を行い、冷延板
表面のローピングを調査した結果を図１に示す。Ｍｄ３
０が３０℃以上になるとローピングは冷延板ではほとん
ど目立たなくなった。従って、成分はＭｄ３０を３０℃
以上にすることが望ましい。しかし、Ｍｄ３０が５０℃
以上になると今度は製品の時効割れ感受性が高くなるの
でＭｄ３０は５０℃以下にしなければならない。なお、
Ｍｄ３０は Ｍｄ３０＝４１３−４６２（Ｃ＋Ｎ）−９．２Ｓｉ−
８．１Ｍｎ−１３．７Ｃｒ−１８．５Ｍｏ−９．１（Ｎ
ｉ＋Ｃｕ） （成分は重量％） で定義される。About Md 30:30 to 50 ° C .; Cr-
The roping of cold cast Ni-based stainless steel is Md.
Is greatly affected by 30. That is, in our experiments,
Various Cr-Ni-based stainless steels with different Md30 were cast into thin slabs with a thickness of 3 mm using a twin drum casting machine, descaled, and then cold rolled at 50% at 120 ° C to rop the surface of the cold rolled sheet. The result of the investigation is shown in FIG. Md3
When 0 was 30 ° C or higher, the roping became almost inconspicuous in the cold-rolled sheet. Therefore, the component is Md30 at 30 ℃
It is desirable to set the above. However, Md30 is 50 ℃
If the above is the case, the susceptibility to age cracking of the product will increase, so Md30 must be kept below 50 ° C. In addition,
Md30 is Md30 = 413-462 (C + N) -9.2Si-.
8.1Mn-13.7Cr-18.5Mo-9.1 (N
i + Cu) (components are wt%).
【００１２】冷延条件：全圧下率の８０％以上を１００
〜２００℃の温度域で圧延する事について；Ｍｄ３０を
３０℃〜５０℃にして鋳造した薄鋳片の冷延焼鈍後のロ
ーピングは冷間圧延温度に大きく影響される。本発明者
等の実験で、Ｍｄ３０を３５℃にしたＳＵＳ３０４組成
のＣｒ−Ｎｉ系ステンレス鋼をツインドラム鋳造機で板
厚３mmの薄鋳片に鋳造し、デスケール後、種々の温度で
冷間圧延し、Ｈ2 ＋Ｎ2 雰囲気中で１１００℃に昇温し
て２０秒間の冷延板焼鈍を行い、冷延焼鈍板のローピン
グを測定した結果を図２に示した。冷延焼鈍板のローピ
ングは冷延温度が１００〜２００℃の範囲で、最も小さ
くなることが判った。Cold rolling condition: 80% or more of the total rolling reduction is 100
About rolling in a temperature range of up to 200 ° C; The roping after cold rolling annealing of thin cast pieces cast with Md30 of 30 ° C to 50 ° C is greatly affected by the cold rolling temperature. In an experiment conducted by the present inventors, Cr-Ni stainless steel having a SUS304 composition with Md30 of 35 ° C. was cast into a thin slab having a thickness of 3 mm by a twin drum casting machine, and after descaling, cold rolling was performed at various temperatures. Then, the temperature was raised to 1100 ° C. in a H 2 + N 2 atmosphere, cold-rolled sheet annealing was performed for 20 seconds, and the roping of the cold-rolled annealed sheet was measured. The results are shown in FIG. It was found that the roping of the cold rolled annealed sheet was the smallest in the cold rolling temperature range of 100 to 200 ° C.
【００１３】冷延温度によって冷延焼鈍後のローピング
が大きく変化する原因としては、冷延温度の上昇によっ
て加工誘起マルテンサイトの発生量が減少するため、逆
変態量が少なくなって、焼鈍時の肌荒れ発生量が小さく
なったと考えられた。しかし、冷延温度を２００℃以上
にすると、冷延時に発生するマルテンサイト量が無くな
るため、冷延時におけるγ粒相互の変形能の差が大きく
なって冷延時にローピングが発生したと考えられた。冷
延温度を全圧下率に渡って制御することは技術的に困難
であるが、全圧下率の８０％以上において圧延温度を制
御しないと上記のローピング軽減効果は得られない。The reason why the roping after cold-rolling annealing greatly changes depending on the cold-rolling temperature is that the amount of work-induced martensite is reduced by the increase of cold-rolling temperature, so that the amount of reverse transformation is decreased and the amount of reverse transformation is decreased. It was considered that the amount of rough skin had decreased. However, when the cold rolling temperature is 200 ° C. or higher, the amount of martensite generated during cold rolling disappears, so that the difference in deformability between γ grains during cold rolling becomes large, and it is considered that roping occurred during cold rolling. . Although it is technically difficult to control the cold rolling temperature over the entire rolling reduction, the above roping reduction effect cannot be obtained unless the rolling temperature is controlled at 80% or more of the total rolling reduction.
【００１４】焼鈍時の張力：０．３kg／mm2 以上につい
て；焼鈍時の張力を０．３kg／mm2 以上に限定した理由
は、焼鈍時に発生する肌荒れ（ローピング）は、焼鈍時
の鋼板にかかる張力を大きくすることで軽減すること
が、本発明者らの実験で明らかになったからである。Tension during annealing: About 0.3 kg / mm 2 or more; The reason why the tension during annealing is limited to 0.3 kg / mm 2 or more is that the roughening (roping) that occurs during annealing is due to the steel plate during annealing. This is because it was clarified by experiments conducted by the present inventors that the tension is reduced by increasing the tension.
【００１５】即ち、Ｍｄ３０を３５℃に調製したＳＵＳ
３０４組成のＣｒ−Ｎｉ系ステンレス鋼をツインドラム
鋳造機で板厚３mmの薄鋳片に鋳造し、デスケール後、常
温で５０％の冷延率で冷間圧延を行い、次いで、Ｈ2 ＋
Ｎ2 雰囲気中で１１００℃に昇温して２０秒間の冷延板
焼鈍を行う際、焼鈍時の張力を０〜１．０kg／mm2 の範
囲で試験したところ、冷延焼鈍板のローピング高さと張
力の関係を図３に示したように、ローピングは張力が
０．３kg／mm2 を越えると軽減することが明らかになっ
た。そこで、冷延板焼鈍時における張力を０．３kg／mm
2 以上にすることにしたのである。しかし、張力を１．
０kg／mm2 超にすると、焼鈍時に鋼板が変形し、操業が
難しくなるため、張力は１．０kg／mm2 を上限とした。
但し、この時の焼鈍温度は現行の熱延プロセスで冷延板
に行ってきた焼鈍温度である。即ち、１０００℃未満で
は回復、再結晶が十分に進まないため１０００℃以上と
しており、焼鈍温度を１２００℃を越えると焼鈍後の結
晶粒径が粗大になり、製品を加工した際に肌荒れが生じ
るために１２００℃以下とした。That is, SUS prepared by adjusting Md30 to 35 ° C.
Cr-Ni type stainless steel of 304 composition was cast into a thin slab with a thickness of 3 mm by a twin drum casting machine, and after descaling, cold rolling was performed at a cold rolling rate of 50% at room temperature, and then H 2 +.
When the cold-rolled sheet was annealed for 20 seconds at a temperature of 1100 ° C. in a N 2 atmosphere, the tension during annealing was tested in the range of 0 to 1.0 kg / mm 2 , and the roping height of the cold-rolled annealed sheet was high. As shown in FIG. 3, the relationship between the tension and the tension was found to decrease when the tension exceeds 0.3 kg / mm 2 . Therefore, the tension during cold-rolled sheet annealing is 0.3 kg / mm.
I decided to make it 2 or more. However, if the tension is 1.
If it exceeds 0 kg / mm 2 , the steel sheet will be deformed during annealing, making it difficult to operate. Therefore, the upper limit of the tension is 1.0 kg / mm 2 .
However, the annealing temperature at this time is the annealing temperature used for the cold rolled sheet in the current hot rolling process. That is, if the temperature is less than 1000 ° C, recovery and recrystallization do not proceed sufficiently, so the temperature is set to 1000 ° C or more. If the annealing temperature exceeds 1200 ° C, the crystal grain size after annealing becomes coarse, and roughening occurs when the product is processed. Therefore, the temperature is set to 1200 ° C. or lower.
【００１６】[0016]
【実施例】表１の本発明法に示す１８％Ｃｒ−８％Ｎｉ
を主成分とするＣｒ−Ｎｉ系ステンレス鋼を溶製し、双
ドラム方式の薄板連鋳機で板厚３mmの薄鋳片に鋳造し
た。鋳片は表２の本発明法に示す様な条件で溶体化熱処
理後、又は熱処理せずにデスケーリングし種々の圧下条
件で冷延し、１１００℃で焼鈍した。焼鈍時に鋼板にか
かる張力は０．３〜１．０kg／mm2 に制御した。冷延焼
鈍板のローピングは２次元粗さ計で測定した。EXAMPLE 18% Cr-8% Ni shown in the method of the present invention in Table 1
Cr-Ni-based stainless steel containing as a main component was melted and cast into a thin cast piece having a plate thickness of 3 mm by a twin-drum type thin plate continuous casting machine. The slab was subjected to solution heat treatment under the conditions shown in the method of the present invention in Table 2 or descaling without heat treatment, cold rolled under various rolling conditions, and annealed at 1100 ° C. The tension applied to the steel sheet during annealing was controlled to 0.3 to 1.0 kg / mm 2 . The roping of the cold rolled annealed plate was measured with a two-dimensional roughness meter.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】比較例として、表１比較法に示す組成のＣ
ｒ−Ｎｉ系ステンレス鋼から薄鋳片を鋳造し、表２の比
較法に示す条件で冷延焼鈍板とした。本発明法で製造し
た冷延焼鈍板はローピングが小さく、特に冷延温度が１
００〜２００℃で、かつ焼鈍時の張力が０．３〜１．０
kg／mm2 の範囲の場合に、最も良好な表面品質が得られ
た。比較法で製造した冷延焼鈍板はローピングが大き
く、表面品質が不合格レベルであった。As a comparative example, C having the composition shown in Table 1 Comparative Method
A thin cast piece was cast from r-Ni-based stainless steel, and a cold rolled annealed plate was obtained under the conditions shown in the comparative method of Table 2. The cold-rolled annealed sheet produced by the method of the present invention has a small roping, and particularly has a cold-rolling temperature of 1
0 to 200 ° C, and the tension during annealing is 0.3 to 1.0
The best surface quality was obtained in the kg / mm 2 range. The cold-rolled annealed sheet produced by the comparative method had large roping, and the surface quality was at an unacceptable level.
【００２０】[0020]
【発明の効果】上記したように本発明によれば、ＳＴＣ
プロセスによって、良好な表面品質を有するＣｒ−Ｎｉ
系ステンレス鋼薄板を製造することができるので、経済
性の点でその技術的効果は極めて大きい。As described above, according to the present invention, the STC
Depending on the process, Cr-Ni with good surface quality
Since it is possible to manufacture a stainless steel thin plate, its technical effect is extremely great in terms of economy.
【図１】冷延板のローピング高さに及ぼすＭｄ３０の影
響を示す図である。FIG. 1 is a diagram showing an influence of Md30 on a roping height of a cold rolled sheet.
【図２】冷延焼鈍板のローピングに及ぼす冷延温度の影
響を示す図である。FIG. 2 is a diagram showing the effect of cold rolling temperature on the roping of a cold rolled annealed plate.
【図３】冷延焼鈍板のローピングに及ぼす冷延板焼鈍時
の張力の影響を示す図である。FIG. 3 is a diagram showing the effect of tension during cold-rolled sheet annealing on the roping of the cold-rolled annealed sheet.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井上 周一 山口県光市大字島田3434番地 新日本製鐵 株式会社光製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuichi Inoue 3434 Shimada, Hikari City, Yamaguchi Prefecture Shin Nippon Steel Co., Ltd.
Claims (3)
mm以下の薄肉鋳片を鋳造し、該薄肉鋳片を冷間圧延、焼
鈍して薄板製品とするＣｒ−Ｎｉ系ステンレス鋼薄板の
製造方法において、前記薄肉鋳片のＣｒ−Ｎｉ系ステン
レス鋼成分のＭｄ３０を３０〜５０℃とするとともに、
該薄肉鋳片を冷間圧延する際に、全圧下率の８０％以上
を１００〜２００℃の温度域で圧延し、その後、該冷延
板を１０００〜１１５０℃の温度域で焼鈍することを特
徴とする表面品質の優れたＣｒ−Ｎｉ系ステンレス鋼薄
板の製造方法。但し、Ｍｄ３０＝４１３−４６２（Ｃ＋
Ｎ）−９．２Ｓｉ−８．１Ｍｎ−１３．７Ｃｒ−１８．
５Ｍｏ−９．１（Ｎｉ＋Ｃｕ） （成分は重量％）1. A plate thickness of 10 from Cr--Ni type stainless steel.
In a method for producing a Cr-Ni-based stainless steel thin plate, which comprises casting a thin-walled slab of mm or less, cold-rolling and annealing the thin-walled slab to obtain a thin plate product, a Cr-Ni-based stainless steel component of the thin-walled slab Md30 of 30 to 50 ℃,
When cold rolling the thin cast piece, 80% or more of the total rolling reduction is rolled in the temperature range of 100 to 200 ° C., and then the cold rolled sheet is annealed in the temperature range of 1000 to 1150 ° C. A method for producing a Cr-Ni-based stainless steel thin plate having excellent surface quality. However, Md30 = 413-462 (C +
N) -9.2Si-8.1Mn-13.7Cr-18.
5Mo-9.1 (Ni + Cu) (Components are wt%)
mm以下の薄肉鋳片を鋳造し、該薄肉鋳片を冷間圧延、焼
鈍して薄板製品とするＣｒ−Ｎｉ系ステンレス鋼薄板の
製造方法において、前記薄肉鋳片のＣｒ−Ｎｉ系ステン
レス鋼成分のＭｄ３０を３０〜５０℃とするとともに、
該薄肉鋳片を冷間圧延した後に、該冷延板に０．３〜
１．０kg／mm2 の張力をかけつゝ１０００〜１１５０℃
の温度域で焼鈍することを特徴とする表面品質の優れた
Ｃｒ−Ｎｉ系ステンレス鋼薄板の製造方法。但し、Ｍｄ
３０＝４１３−４６２（Ｃ＋Ｎ）−９．２Ｓｉ−８．１
Ｍｎ−１３．７Ｃｒ−１８．５Ｍｏ−９．１（Ｎｉ＋Ｃ
ｕ） （成分は重量％）2. A plate thickness of 10 from Cr--Ni type stainless steel.
In a method for producing a Cr-Ni-based stainless steel thin plate in which a thin-walled slab having a thickness of mm or less is cast, and the thin-walled slab is cold-rolled and annealed to obtain a thin plate product, a Cr-Ni-based stainless steel component of the thin-walled slab Md30 of 30 to 50 ℃,
After cold-rolling the thin-walled slab, the cold-rolled sheet has 0.3 to
Applying tension of 1.0 kg / mm 2 1000-1150 ° C
A method for producing a Cr-Ni-based stainless steel sheet having excellent surface quality, characterized by annealing in a temperature range of. However, Md
30 = 413-462 (C + N) -9.2Si-8.1
Mn-13.7Cr-18.5Mo-9.1 (Ni + C
u) (Ingredient is% by weight)
張力をかけつゝ焼鈍することを特徴とする請求項１記載
の表面品質の優れたＣｒ−Ｎｉ系ステンレス鋼薄板の製
造方法。3. The Cr-Ni type stainless steel thin plate with excellent surface quality according to claim 1, wherein the cold-rolled plate is annealed by applying a tension of 0.3 to 1.0 kg / mm 2. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1161193A JPH06220544A (en) | 1993-01-27 | 1993-01-27 | Production of cr-ni series stainless steel thin sheet excellent in surface quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1161193A JPH06220544A (en) | 1993-01-27 | 1993-01-27 | Production of cr-ni series stainless steel thin sheet excellent in surface quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06220544A true JPH06220544A (en) | 1994-08-09 |
Family
ID=11782710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1161193A Withdrawn JPH06220544A (en) | 1993-01-27 | 1993-01-27 | Production of cr-ni series stainless steel thin sheet excellent in surface quality |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06220544A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100448517B1 (en) * | 1999-12-22 | 2004-09-13 | 주식회사 포스코 | Method for continuous annealing ferritic stainless hot rolled steel |
| KR100515041B1 (en) * | 2000-06-23 | 2005-09-15 | 주식회사 포스코 | Method for continuous annealing the hot-rolled duplex stainless steel coil |
| KR100562660B1 (en) * | 2001-12-14 | 2006-03-20 | 주식회사 포스코 | A method of continuous annealing for cold-rolled 22Cr duplex stainless steel |
-
1993
- 1993-01-27 JP JP1161193A patent/JPH06220544A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100448517B1 (en) * | 1999-12-22 | 2004-09-13 | 주식회사 포스코 | Method for continuous annealing ferritic stainless hot rolled steel |
| KR100515041B1 (en) * | 2000-06-23 | 2005-09-15 | 주식회사 포스코 | Method for continuous annealing the hot-rolled duplex stainless steel coil |
| KR100562660B1 (en) * | 2001-12-14 | 2006-03-20 | 주식회사 포스코 | A method of continuous annealing for cold-rolled 22Cr duplex stainless steel |
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