JPS5945018A - Manufacture of hot-rolled steel sheet having small amount of scale - Google Patents
Manufacture of hot-rolled steel sheet having small amount of scaleInfo
- Publication number
- JPS5945018A JPS5945018A JP15636682A JP15636682A JPS5945018A JP S5945018 A JPS5945018 A JP S5945018A JP 15636682 A JP15636682 A JP 15636682A JP 15636682 A JP15636682 A JP 15636682A JP S5945018 A JPS5945018 A JP S5945018A
- Authority
- JP
- Japan
- Prior art keywords
- hot
- water
- steel sheet
- scale
- rolled steel
- 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.)
- Pending
Links
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
Abstract
Description
【発明の詳細な説明】
この発明は、スケール発生の少ない熱延鋼板の製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a hot rolled steel sheet with less scale generation.
従来から熱鋼板は、加熱炉で加熱した鋼板を熱間圧延機
で所定寸法まで圧延したのちホットランテーブルの冷却
ゾーンを通過させて所定温度に冷却し巻取機で巻取られ
る。巻取られた鋼板は、圧延中あるいは冷却ゾーンを通
過中に表面が酸化されてスケールで覆われた黒皮の熱延
鋼板が得られるものである。この黒皮の熱延鋼板はさら
に、冷間圧延あるいは表面処理が行なわれるためスケー
ルを除去する必要がある。鋼板のスケール除去には酸洗
法等の化学的処理法と、ショットブラスト等の機械的処
理法とがあるが、生産性等のため酸洗処理法がその主流
となっている。しかし、酸洗法には長大な酸洗槽や廃酸
設備が必要である。またショットブラスト法等の機械的
処理法は生産性が悪く、何れにしても多額のスケール除
去費が必要である。そのためスケール発生の少ない熱延
鋼板の製造が強く望まれている。Conventionally, hot steel sheets are heated in a heating furnace, rolled to a predetermined size in a hot rolling mill, passed through a cooling zone of a hot run table to be cooled to a predetermined temperature, and then wound up in a winder. The surface of the coiled steel sheet is oxidized during rolling or passing through a cooling zone, resulting in a black hot-rolled steel sheet covered with scale. Since this hot-rolled steel sheet with black scale is further subjected to cold rolling or surface treatment, it is necessary to remove scale. There are chemical treatment methods such as pickling and mechanical treatment methods such as shot blasting to remove scale from steel plates, but pickling is the mainstream method due to productivity and other reasons. However, the pickling method requires a long pickling tank and waste acid equipment. In addition, mechanical treatment methods such as shot blasting have poor productivity, and in any case, a large amount of scale removal costs are required. Therefore, it is strongly desired to produce hot rolled steel sheets with less scale generation.
発明者等は、このような観点からスケールの発生の少な
い熱延鋼板の製造について種々検討を行なった。熱間圧
延直後の熱延鋼板は８００〜９００℃の温度があり、そ
のあと数メータの空冷ゾーンをへたあと冷却ゾーンでは
１００〜１５０ｍの長い冷却装置により巻取温度５５０
〜７５０℃に水冷されたのち巻収られている。この間で
スケール発生の最も多い区間は空冷ゾーンであり、鋼板
温度では仕上温度の８００〜９００℃から巻取温度の５
５０〜７５０℃の間で、巻取温度以下ではあまり発生し
ないことを見出した。From this point of view, the inventors have conducted various studies on the production of hot rolled steel sheets with less scale formation. Hot-rolled steel sheets immediately after hot rolling have a temperature of 800 to 900 degrees Celsius, and after passing through an air cooling zone of several meters, a long cooling device of 100 to 150 meters is used in the cooling zone to reduce the coiling temperature to 550 degrees Celsius.
After being water-cooled to ~750°C, it is rolled up. During this period, the zone where most scale occurs is the air cooling zone, and the steel plate temperature ranges from the finishing temperature of 800 to 900℃ to the coiling temperature of 5℃.
It has been found that it does not occur much at temperatures between 50 and 750°C and below the winding temperature.
この発明はこのような知見にもとづくものでその特徴と
するところは、熱間圧延機の仕上ロールスタンドにつづ
いて、外気をシールした巻取機を設け、該シール内に不
活性ガスを封入するとともに、鋼板表面に冷却水を噴射
して鋼板を冷却させながら巻取るか或は、シール内に水
を供給して、水没状態とし、鋼板を水中で巻取ることを
特徴とするものである。This invention is based on such knowledge, and its characteristics are that a winding machine sealed from outside air is provided following the finishing roll stand of a hot rolling mill, and an inert gas is sealed within the seal. In addition, the steel plate is characterized in that the steel plate is wound up while being cooled by injecting cooling water onto the surface of the steel plate, or by supplying water into a seal to submerge the steel plate in water.
すなわち、スケール発生の最も多い温度範囲を外気との
接触を防止して急速に冷却して巻取るものである。In other words, the material is rapidly cooled and wound while preventing contact with outside air in the temperature range where scale is most likely to occur.
以下添付図面にもとづいてこの発明を説明する。The present invention will be explained below based on the accompanying drawings.
第１図はこの発明において水中で巻取る場合を示す図で
ある。（１）は仕上ロールスタンド、（２）はピンチロ
ール、（３）はマンドレル、（４）はラッパーロールで
ある。すなわち、仕上ロールスタンドにつづいて巻取機
を設ける。またこの巻取機は水槽（５）内に収容されて
おり、冷却水の給水管（６）と排水管（７）により冷却
水を給排水し、鋼板板を水中で巻取るものである。さら
に、カバー（８）により鋼板（９）は外気とシールされ
るようになっている。仕上ロールスタンド（１）からの
鋼板（９）は外気と接触することなくピンチロール（２
）からマンドレル（３）により水中で冷却されながら巻
取られる。鋼板温度が５００〜６００℃まで冷却される
とマンドレル（３）から取外しコイルカー等により取出
し放冷されるものである。このような構成であるので、
冷却水の水量と温度は一定に保持する方が好ましい。（
１０）は温度計であり、給排水の水量を制御して水温を
常に一定とするものである。FIG. 1 is a diagram showing the case of winding underwater in the present invention. (1) is a finishing roll stand, (2) is a pinch roll, (3) is a mandrel, and (4) is a wrapper roll. That is, a winder is provided following the finishing roll stand. Further, this winding machine is housed in a water tank (5), supplies and drains cooling water through a cooling water supply pipe (6) and a drain pipe (7), and winds up the steel plate underwater. Furthermore, the steel plate (9) is sealed from the outside air by the cover (8). The steel plate (9) from the finishing roll stand (1) is transferred to the pinch roll (2) without coming into contact with the outside air.
) is wound up by a mandrel (3) while being cooled in water. Once the steel plate temperature has cooled to 500 to 600°C, it is removed from the mandrel (3) and taken out using a coil car or the like and left to cool. With this configuration,
It is preferable to keep the amount and temperature of the cooling water constant. (
10) is a thermometer that controls the amount of water supplied and drained to keep the water temperature constant.
第２図はこの発明において、不活性ガスを供給しつつ冷
却水で鋼板を冷却して巻取る場合を示す図である。仕上
スタンド（１）につづいて設けた巻取機は、カバー（８
）内に収容されており、供給管（１１）より供給される
Ｎ２、Ａｒの不活性ガスによりカバー（８）内を無酸化
状態とする。FIG. 2 is a diagram showing a case in which a steel plate is cooled with cooling water and wound while supplying an inert gas in the present invention. The winding machine installed following the finishing stand (1) has a cover (8).
), and the inside of the cover (8) is made non-oxidized by inert gases such as N2 and Ar supplied from the supply pipe (11).
したがって鋼板（４）は外気と接触することなく、無酸
化雰囲気中でノズル（１３）より噴射された水・噴霧水
等の冷却水で冷却されながら巻取られる。Therefore, the steel plate (4) is wound up while being cooled by cooling water such as water or spray water sprayed from the nozzle (13) in a non-oxidizing atmosphere without contacting the outside air.
尚（１２）は冷却後の残水を排出する排水管である。Note that (12) is a drain pipe for discharging residual water after cooling.
次に実施例について説明する。Next, an example will be described.
実施例１．
第１図に例示する装置を用いてこの発明を実施した。実
施した鋼板の成分を第１表に示す。Example 1. This invention was carried out using the apparatus illustrated in FIG. Table 1 shows the components of the steel sheets tested.
この成分の鋼を熱間連続圧延機で圧延し第１図に示す装
置により水中で巻取り冷却した。鋼板寸法と仕上温度な
らびに巻取後の温度を第２表に示す。Steel of this composition was rolled in a continuous hot rolling mill, coiled in water using the apparatus shown in FIG. 1, and cooled. Table 2 shows the steel plate dimensions, finishing temperature, and temperature after coiling.
冷却条件は水量３００ｍ３、水温１０℃の一定とし、こ
の水量と水温を一定とするため６ｍ３／分の冷却水を給
排水しながら巻取ったものである。The cooling conditions were a constant water volume of 300 m3 and a constant water temperature of 10° C., and in order to keep the water volume and water temperature constant, the coil was wound up while supplying and discharging cooling water at 6 m3/min.
実施例２．
第１表に示す鋼板と同成分及び寸法の鋼板を第２図に示
す装置を用いてこの発明を実施した。不活性ガスはＮ２
ガスを用いカバー内の酸素濃度を０．５ｐｐｍ以下とし
１３°／秒の冷却速度で水冷却した。鋼板寸法と仕上温
度、巻取後の温度を第３表に示す。Example 2. This invention was carried out using a steel plate having the same composition and dimensions as the steel plate shown in Table 1 and using the apparatus shown in FIG. Inert gas is N2
The oxygen concentration in the cover was set to 0.5 ppm or less using gas, and water cooling was performed at a cooling rate of 13°/sec. Table 3 shows the steel plate dimensions, finishing temperature, and temperature after coiling.
実施例１および実施例２において得られた鋼板のスケー
ル厚さと酸洗時間についに調査した。比較のため従来方
法による鋼板についても調査し併せて第４表に示す。Finally, the scale thickness and pickling time of the steel plates obtained in Examples 1 and 2 were investigated. For comparison, steel plates made using the conventional method were also investigated and are also shown in Table 4.
第４表であきらかのように、この発明方法によって得ら
れた鋼板は、発生するスケールは極少に押えられ酸洗時
間も短時間であることを示している。As is clear from Table 4, in the steel sheets obtained by the method of the present invention, the scale generated is minimized and the pickling time is short.
以上のように、この発明は、熱圧延鋼板の製造において
、スケールの最も多く発生する温度範囲を外気からシー
ルして冷却しながら巻取るためスケールの発生は極少に
抑制される。したがって従来のような長大な酸洗設備が
不要となるとともに脱スケール工数の削減或いはスケー
ル除去費の節減等多大な効果がある。またスケール発生
が少ないため圧延歩留も向上する等の効果も有するもの
である。As described above, in the production of hot-rolled steel sheets, the present invention seals the temperature range where most scale occurs from the outside air and winds it while cooling, so that the generation of scale is suppressed to a minimum. Therefore, there is no need for a long pickling equipment as in the past, and there are great effects such as reduction in descaling man-hours and scale removal costs. Furthermore, since there is less scale generation, the rolling yield also improves.
第１図はこの発明において水中で巻取る場合を示す図、
第２図はこの発明において、不活性ガスを供給しつつ冷
却水で冷却しながら巻取る場合を示す図である。
図中、１・・・仕上ロールスタンド、２・・・ピンチロ
ール、３・・・マンドレル、４・・・ラッパーロール、
５・・・水槽、６・・・給水管、７・・・排水管、８・
・・カバー、９・・・鋼板、１０・・・温度計、１１・
・・ガス供給管、１２・・・ガス排出管、１３・・・ノ
ズル。
出願人 住友金属工業株式会社
代理人 押川 良久FIG. 1 is a diagram showing the case of winding underwater in this invention;
FIG. 2 is a diagram showing the case of winding the film while supplying an inert gas and cooling with cooling water in the present invention. In the figure, 1... Finishing roll stand, 2... Pinch roll, 3... Mandrel, 4... Wrapper roll,
5... Water tank, 6... Water supply pipe, 7... Drain pipe, 8...
... Cover, 9... Steel plate, 10... Thermometer, 11.
...Gas supply pipe, 12...Gas discharge pipe, 13...Nozzle. Applicant Sumitomo Metal Industries Co., Ltd. Agent Yoshihisa Oshikawa
Claims (2)
気をシールした巻取機を設け、シール内に不活性ガスを
供給するとともに、鋼板表面に冷却水を噴射し、鋼板を
冷却しながら巻取ることを特徴とするスケールの少ない
熱延鋼板の製造方法。(1) Following the finishing roll stand of the hot rolling mill, a winding machine sealed against outside air is installed, and inert gas is supplied into the seal, and cooling water is injected onto the steel plate surface to cool the steel plate. A method for manufacturing a hot-rolled steel sheet with a small scale, characterized by winding.
気をシールした巻取機を設け、シール内に冷却水を供給
し、鋼板を水中で冷却しながら巻取ることを特徴とする
スケールの少ない熱延板の製造方法。(2) A winding machine that is sealed from outside air is installed next to the finishing roll stand of a hot rolling mill, and cooling water is supplied into the seal to wind the steel plate while cooling it in water. A method for producing hot-rolled sheets in small quantities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15636682A JPS5945018A (en) | 1982-09-08 | 1982-09-08 | Manufacture of hot-rolled steel sheet having small amount of scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15636682A JPS5945018A (en) | 1982-09-08 | 1982-09-08 | Manufacture of hot-rolled steel sheet having small amount of scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5945018A true JPS5945018A (en) | 1984-03-13 |
Family
ID=15626176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15636682A Pending JPS5945018A (en) | 1982-09-08 | 1982-09-08 | Manufacture of hot-rolled steel sheet having small amount of scale |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5945018A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192706A (en) * | 1984-10-12 | 1986-05-10 | Sumitomo Metal Ind Ltd | Preventing method of local cooling in continuous hot rolling line |
| JPH0690414A (en) * | 1991-05-31 | 1994-03-29 | Victor Co Of Japan Ltd | Picture in picture circuit |
| EP2143504A1 (en) * | 2008-07-07 | 2010-01-13 | Siemens Aktiengesellschaft | Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device and metal strip |
| CN102319765A (en) * | 2011-06-28 | 2012-01-18 | 马鞍山钢铁股份有限公司 | Wrapper roll for recoiling machine in CPS (Compact Trip Roduction) production line and lubricating method thereof |
-
1982
- 1982-09-08 JP JP15636682A patent/JPS5945018A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192706A (en) * | 1984-10-12 | 1986-05-10 | Sumitomo Metal Ind Ltd | Preventing method of local cooling in continuous hot rolling line |
| JPH0690414A (en) * | 1991-05-31 | 1994-03-29 | Victor Co Of Japan Ltd | Picture in picture circuit |
| EP2143504A1 (en) * | 2008-07-07 | 2010-01-13 | Siemens Aktiengesellschaft | Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device and metal strip |
| WO2010003723A1 (en) * | 2008-07-07 | 2010-01-14 | Siemens Aktiengesellschaft | Method for cooling a hot strip wound to a hot strip bundle, a device for cooling a hot strip, a control and/or regulating device, and metal strip |
| CN102089091A (en) * | 2008-07-07 | 2011-06-08 | 西门子公司 | Method for cooling a hot strip wound to a hot strip bundle, a device for cooling a hot strip, a control and/or regulating device, and metal strip |
| US8635895B2 (en) | 2008-07-07 | 2014-01-28 | Siemens Aktiengesellschaft | Method for cooling a hot strip wound to a hot strip bundle, a device for cooling a hot strip, a control and/or a regulation device and metal strip |
| CN102319765A (en) * | 2011-06-28 | 2012-01-18 | 马鞍山钢铁股份有限公司 | Wrapper roll for recoiling machine in CPS (Compact Trip Roduction) production line and lubricating method thereof |
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