JPH0452018A - Method for heating stainless steel strip - Google Patents
Method for heating stainless steel stripInfo
- Publication number
- JPH0452018A JPH0452018A JP16000890A JP16000890A JPH0452018A JP H0452018 A JPH0452018 A JP H0452018A JP 16000890 A JP16000890 A JP 16000890A JP 16000890 A JP16000890 A JP 16000890A JP H0452018 A JPH0452018 A JP H0452018A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- stainless steel
- steel strip
- heating capacity
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 33
- 239000010935 stainless steel Substances 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000005096 rolling process Methods 0.000 claims description 21
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ステンレス鋼帯の温間圧延におけるステンレ
ス鋼帯の加熱方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for heating a stainless steel strip during warm rolling of the stainless steel strip.
〈従来の技術〉
−ａに変形抵抗の大きいステンレス鋼帯等の冷間圧延は
、通常ゼンジミア圧延機等の多重式高圧下圧延機による
可逆圧延が多く行われる。しかし、この可逆式で行う多
重高圧下圧延機による圧延方法は、圧延速度が比較的遅
く、従、て生産性が悪そこで、最近では一般の銅帯の圧
延に使用するタンデム圧延機によってステンレス鋼帯を
連続的に冷間圧延を行うことが志向されるようになった
。<Prior Art> -a. Cold rolling of stainless steel strips having high deformation resistance is usually performed by reversible rolling using a multi-layer high reduction rolling mill such as a Sendzimir rolling mill. However, this reversible rolling method using multiple high-reduction rolling mills has a relatively slow rolling speed, resulting in poor productivity. There has been a trend toward continuous cold rolling of strips.
しかし、ステンレス鋼でも特に５ＵＳ３０４．５ＵＳ３
０１などの準安定オーステナイト系のステンレス鋼は、
冷間加工によってオーステナイトの一部が歪誘起マルテ
ンサイトに変態し、著しい加工硬化を示すため、タンデ
ム圧延機では大きな圧下率がとれないという問題があり
、このことがステンレス鋼帯の冷間圧延のクンデム圧延
化の大きな障害となっている。However, even stainless steel, especially 5US304.5US3
Metastable austenitic stainless steel such as 01 is
During cold working, part of the austenite transforms into strain-induced martensite, resulting in significant work hardening.Therefore, tandem rolling mills cannot achieve a large rolling reduction. This is a major obstacle to Kundem rolling.
そこで、このような加工硬化を防止するために、特開昭
６３−１０００９号公報ではタンデム圧延機入側に加熱
装置を設けて、ステンレス鋼帯を加熱した後に温間タン
デム圧延することが開示されており、ステンレスｗ４帯
の加熱温度範囲としては、下限は可能な圧下率向上の効
果を得るために８０゛Ｃ以上、上限はステンレス鋼の表
面が大気中の酸素による酸化を防止するために２００’
Ｃ以下にすることが望ましいと規定されている。Therefore, in order to prevent such work hardening, JP-A-63-10009 discloses that a heating device is installed on the entry side of a tandem rolling mill to heat the stainless steel strip and then perform warm tandem rolling. As for the heating temperature range for stainless steel W4 band, the lower limit is 80°C or higher to obtain the effect of improving the reduction rate, and the upper limit is 200°C or higher to prevent the surface of the stainless steel from being oxidized by oxygen in the atmosphere. '
It is stipulated that it is desirable to keep it below C.
そして、木発明者らは特願平１−７０５７８号にて、ス
テンレス鋼帯を加熱するに先立ち、温水槽に浸漬させて
予熱することにより、温度制御性を向上させるステンレ
ス鋼帯の加熱方法を提案しでいる。In Japanese Patent Application No. 1-70578, the inventors proposed a method for heating a stainless steel strip that improves temperature control by preheating the stainless steel strip by immersing it in a hot water bath before heating it. I have a proposal.
〈発明が解決しようとする課題〉
しかしながら、温水槽を用いてステンレス鋼帯の予熱を
行うには、以下に説明するような問題があった。一般に
タンデム圧延前のステンレス綱帯の板厚みは３〜５ｍｍ
で厚く、かつ生産性を高めるために圧延速度は圧延機前
で１００〜３００ｍｐｍと高速であるため熱負荷が非常
に高い、このため温水槽の機長を大きくする必要があっ
た。また機長を短くするために温水槽内で温水噴流をス
テンレス調帯に衝突させて加熱能力を増大させる方法が
考えられるが、この方法においては、熱負荷が高いこと
から循環ポンプ及び循環配管を大きくする必要があると
いう問題があった。<Problems to be Solved by the Invention> However, preheating a stainless steel strip using a hot water tank has the following problems. Generally, the thickness of stainless steel strip before tandem rolling is 3 to 5 mm.
In order to increase the thickness and productivity, the rolling speed in front of the rolling mill is as high as 100 to 300 mpm, which results in a very high heat load, which necessitates increasing the length of the hot water tank. In addition, in order to shorten the length of the aircraft, it is possible to increase the heating capacity by colliding a hot water jet with a stainless steel belt in a hot water tank, but this method requires a large circulation pump and circulation piping due to the high heat load. The problem was that it needed to be done.
本発明は、上記の問題を解決したステンレス鋼帯の温間
圧延におけるステンレス鋼帯の加熱方法を提供すること
を目的とする。An object of the present invention is to provide a method for heating a stainless steel strip during warm rolling of a stainless steel strip, which solves the above-mentioned problems.
〈課題を解決するだめの手段〉
本発明は、クンデム圧延機の上流に設置したステンレス
鋼帯の温水加熱方法において、予熱に用いる温水槽中で
蒸気噴流をステンレス鋼帯に衝突させることにより、加
熱能力を増大させることを特徴とするステンレス鋼帯の
加熱方法である。<Means for Solving the Problems> The present invention provides a hot water heating method for a stainless steel strip installed upstream of a Kundem rolling mill, in which a steam jet collides with the stainless steel strip in a hot water tank used for preheating. A method of heating stainless steel strip characterized by increasing capacity.
く作 用〉
本発明によれば、温水槽中において蒸気噴流をステンレ
ス鋼帯に衝突させることにより、蒸気噴流が回りの温水
を巻き込みステンレス鋼帯に衝突することから、加熱能
力を大きくすることができる。これにより、温水槽の機
長を短縮することが可能であり、また、同等の加熱能力
を得るために温水噴流を用いた場合と比較すると、大容
量の循環ポンプ及び温水配管を省略することが可能とな
る。Effect> According to the present invention, by colliding a steam jet against a stainless steel strip in a hot water tank, the steam jet entrains the surrounding hot water and collides with the stainless steel strip, so that the heating capacity can be increased. can. This makes it possible to shorten the length of the hot water tank, and also eliminates the need for large-capacity circulation pumps and hot water piping compared to when hot water jets are used to obtain the same heating capacity. becomes.
第２図に示すように、温水槽内に温水噴出用ヘッダと蒸
気噴出用ヘッダを２００ｍ間隔で設置し、加熱能力につ
いて実験を行った。As shown in FIG. 2, hot water jetting headers and steam jetting headers were installed at intervals of 200 m in a hot water tank, and an experiment was conducted to determine the heating capacity.
その結果を第３図に示す。横軸はヘッダ間距離、縦軸は
熱伝達係数α（ｋ−／ボ°Ｃｈｒ）である。図中、Ｏ印
は蒸気をＩｔ／ｈｒ噴出させた場合、０印は０．５ ｔ
／ｈｒ噴出させた場合を示す、なお温水噴出ヘッダか
らは温水１５．ＯＬ ／ｈｒを噴出した。また参考のた
め、両ヘッダとも温水１５．Ｏｔ／ｈｒを用いた場合を
Δ印で示した。これにより、０．５ ｔ ／ ｈｒ蒸気
の場合、加熱能力は温水の約２倍、Ｉｔ／ｈｒの場合に
は約３倍となることがわかる。The results are shown in FIG. The horizontal axis is the distance between headers, and the vertical axis is the heat transfer coefficient α (k−/bo °Chr). In the diagram, the O mark indicates when steam is ejected at It/hr, and the 0 mark indicates 0.5 t.
/hr This shows the case where hot water is spouted, and warm water 15. OL/hr spewed out. Also, for reference, both headers have hot water at 15. The case where Ot/hr was used is indicated by Δ. This shows that in the case of 0.5 t/hr steam, the heating capacity is approximately twice that of hot water, and in the case of It/hr, the heating capacity is approximately three times.
〈実施例〉 本発明の一実施例を図面に基づき説明する。<Example> An embodiment of the present invention will be described based on the drawings.
第１図は、本発明の一実施例の全体構成図である。FIG. 1 is an overall configuration diagram of an embodiment of the present invention.
第１図において、１はステンレス鋼帯Ｓを予熱するだめ
の温水槽で、内部に温水２が入っている。In FIG. 1, 1 is a hot water tank for preheating a stainless steel strip S, and hot water 2 is contained inside.
３は浸漬ロール、４は温水噴出用ヘッダである。3 is a dipping roll, and 4 is a hot water jetting header.
温水２は図示しないポンプ、配管等により吸引され、前
記温水噴出用へラダ４からステンレス鋼帯Ｓに噴出され
る。５は蒸気噴出用ヘッダであり、蒸気が直接ステンレ
ス鋼帯Ｓに噴出される。The hot water 2 is sucked by a pump, piping, etc. (not shown), and is jetted from the ladder 4 onto the stainless steel strip S for hot water jetting. 5 is a steam jetting header, from which steam is jetted directly onto the stainless steel strip S.
温水槽１で予熱されたステンレス綱帯Ｓは、リンガ−ロ
ール６で表面の温水が除去された後、加熱装置７にて所
定の温度に加熱されて、圧延１ｇＢにて圧延される。The stainless steel wire S which has been preheated in the hot water tank 1 is heated to a predetermined temperature by a heating device 7 after hot water is removed from the surface by a ringer roll 6, and then rolled at a rolling speed of 1 gB.
なお、図中９はデフレフクロール、ＩＯはサポートロー
ル、１１はプライドルロールである。In the figure, 9 is a deflation crawl, IO is a support roll, and 11 is a priddle roll.
次に、本発明の具体的実施例について説明する。Next, specific examples of the present invention will be described.
材質５ＵＳ４３０、板厚４．０ｍｍ、板幅１８００ｍｍ
のステンレス鋼帯を圧延機入側で１５０”Ｃに加熱する
べく、第１図の温水槽１にて、まず板温３０°Ｃから８
５°Ｃに予熱し、ついで加熱装置７で８５℃がら１５０
’Ｃに加熱したところ、最大２００ ｍ ／ １１１１
の速度まで上げることができた。Material 5US430, plate thickness 4.0mm, plate width 1800mm
In order to heat the stainless steel strip to 150"C at the entrance of the rolling mill, the plate temperature was first increased from 30"C to 8
Preheat to 5°C, then heat from 85°C to 150°C using heating device 7.
When heated to 'C, maximum 200 m/1111
I was able to increase the speed to .
しかし、ヘッダが全部温水ヘッダの場合には、１５０ｍ
／ｍｍまでしか速度を上げることができながった。However, if all the headers are hot water headers, 150m
The speed could only be increased to /mm.
〈発明の効果〉
以上説明したように本発明によれば、温水槽において、
蒸気を蒸気噴流として、ステンレス鋼帯に衝突させるこ
とにより、温水槽の機長を短縮できる。また、温水循環
ポンプや配管等を縮小でき、建設費、運転費を大幅に削
減することができる。<Effects of the Invention> As explained above, according to the present invention, in the hot water tank,
By colliding steam with a stainless steel strip as a steam jet, the length of the hot water tank can be shortened. In addition, hot water circulation pumps, piping, etc. can be reduced, and construction costs and operating costs can be significantly reduced.
第１図は本発明の一実施例の全体構成図、第２図は本発
明者らが行った実験における温水噴出用ヘッダと蓋気噴
出用ヘッダの配管を示した側面図、第３図は本発明者ら
が行った実験結果を示すグラフであり、本発明による蒸
気量、ヘッダ間距離と加熱能力との関係及び温水噴出の
場合のヘッダ間距離と加熱能力との関係を示したグラフ
である。
１・・・温水槽、
３・・・浸漬ロール、
５・・・蒸気噴出用ヘッダ、
７・・・加熱装置、
９・・・デフレフクロール、
１１・・・プライドルロール、
２・・・温水、
４・・・温水噴出用ヘッダ、
６・・・リンガ−ロール、
８・・・圧延機、
１０・・・サポートロール、
Ｓ・・・ステンレス鋼帯。Figure 1 is an overall configuration diagram of an embodiment of the present invention, Figure 2 is a side view showing the piping of the hot water jet header and lid air jet header in experiments conducted by the present inventors, and Figure 3 is This is a graph showing the results of an experiment conducted by the present inventors, and is a graph showing the relationship between the amount of steam, the distance between headers, and heating capacity according to the present invention, and the relationship between the distance between headers and heating capacity in the case of hot water jetting. be. DESCRIPTION OF SYMBOLS 1... Hot water tank, 3... Immersion roll, 5... Header for steam jetting, 7... Heating device, 9... Deflation roll, 11... Prydle roll, 2... Hot water , 4... Header for hot water jetting, 6... Ringer roll, 8... Rolling mill, 10... Support roll, S... Stainless steel strip.
Claims (1)
水加熱方法において、予熱に用いる温水槽中で蒸気噴流
をステンレス鋼帯に衝突させることにより、加熱能力を
増大させることを特徴とするステンレス鋼帯の加熱方法
。A hot water heating method for a stainless steel strip installed upstream of a tandem rolling mill, characterized in that the heating capacity of the stainless steel strip is increased by colliding a steam jet against the stainless steel strip in a hot water tank used for preheating. Heating method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160008A JP2665023B2 (en) | 1990-06-20 | 1990-06-20 | Stainless steel strip heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160008A JP2665023B2 (en) | 1990-06-20 | 1990-06-20 | Stainless steel strip heating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0452018A true JPH0452018A (en) | 1992-02-20 |
| JP2665023B2 JP2665023B2 (en) | 1997-10-22 |
Family
ID=15705984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2160008A Expired - Fee Related JP2665023B2 (en) | 1990-06-20 | 1990-06-20 | Stainless steel strip heating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2665023B2 (en) |
-
1990
- 1990-06-20 JP JP2160008A patent/JP2665023B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2665023B2 (en) | 1997-10-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |