JPS6325056B2 - - Google Patents
Info
- Publication number
- JPS6325056B2 JPS6325056B2 JP22860084A JP22860084A JPS6325056B2 JP S6325056 B2 JPS6325056 B2 JP S6325056B2 JP 22860084 A JP22860084 A JP 22860084A JP 22860084 A JP22860084 A JP 22860084A JP S6325056 B2 JPS6325056 B2 JP S6325056B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- pipe
- water
- chamber
- cooling pipe
- 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.)
- Expired
Links
- 238000001816 cooling Methods 0.000 claims description 80
- 239000000498 cooling water Substances 0.000 claims description 62
- 229910000831 Steel Inorganic materials 0.000 claims description 50
- 239000010959 steel Substances 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 238000004891 communication Methods 0.000 claims description 12
- 238000005728 strengthening Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】
［発明の技術分野］
この発明は、熱間圧延条鋼等の表面強化のため
の冷却装置に係り熱間圧延条鋼等の表面の組織を
変化させて強化するために、この熱間圧延条鋼等
を、冷却水内を適宜速度で通過させる装置におい
て、冷却水の効率の良い利用と効率の良い冷却を
行なわしめることにより、省エネルギー、低コス
ト化を図れるようにした熱間圧延条鋼等の表面強
化のための冷却装置に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a cooling device for strengthening the surface of a hot-rolled steel bar, etc., and for strengthening the surface of the hot-rolled bar steel by changing its structure. This hot-rolled steel strip, etc., is passed through cooling water at an appropriate speed in a device that uses cooling water efficiently and performs efficient cooling, thereby saving energy and reducing costs. This invention relates to a cooling device for strengthening the surface of rolled steel strips, etc.
［発明の技術的背景とその問題点］
従来、熱間圧延棒鋼等の圧延物の表面の組織を
変化させて強化するための方法及び装置として、
特公昭57−13367号公報にて圧延物特に棒材の冷
却を制御するための方法及び装置が提案されてい
る。[Technical background of the invention and its problems] Conventionally, as a method and apparatus for changing and strengthening the surface structure of a rolled product such as a hot rolled steel bar,
Japanese Patent Publication No. 57-13367 proposes a method and apparatus for controlling cooling of rolled products, particularly bars.
これによる装置は、第２図に示す如く、熱圧延
物の最後の圧延スタンドに直接冷却管３２が設け
てあり、熱圧延物は冷却管３２内の冷却区間を通
つて太矢印の方向に移動するように形成されてい
る。 As shown in FIG. 2, in this apparatus, a cooling pipe 32 is provided directly at the last rolling stand of the hot-rolled product, and the hot-rolled product moves in the direction of the thick arrow through the cooling section in the cooling pipe 32. It is formed to do so.
そして、冷却管３２は圧延物の入口及び出口側
にノズルヘツド３１を有し、これらノズルヘツド
３１から冷却水が互いに向き合う方向へ供給さ
れ、供給された冷却水はその合流する点で、冷却
管３２に上向きに接続してある中央排水管３３よ
り取除かれ、その多くは絞り弁４０及び排水管３
９を経て排出されるように形成されている。 The cooling pipe 32 has nozzle heads 31 at the inlet and outlet sides of the rolled material, and cooling water is supplied from these nozzle heads 31 in directions facing each other, and the supplied cooling water flows into the cooling pipe 32 at the point where they join. removed from the central drain pipe 33 connected upwards, most of which are connected to the throttle valve 40 and the drain pipe 3.
It is formed so that it is discharged through 9.
又、中央排水管３３に流入した冷却水の一部は
制御弁３６及び枝配管３７を経て入口及び出口側
のノズルヘツド３１の前段の水室３４へ導かれ、
それぞれ溢流路３８を経て再び流出するように形
成され、水室３４内には隔壁３５が設けてあり、
これら圧延物の通過は許すが冷却水をせきとめて
溢流路３８へ流出させるようになつている。 Further, a part of the cooling water that has flowed into the central drain pipe 33 is guided to the water chamber 34 at the front stage of the nozzle head 31 on the inlet and outlet sides through the control valve 36 and the branch pipe 37.
The water is formed to flow out again through an overflow channel 38, and a partition wall 35 is provided in the water chamber 34.
Although these rolled products are allowed to pass through, the cooling water is dammed up and allowed to flow out into the overflow passage 38.
そして、冷却区間内の冷却水圧力も制御弁３６
及び絞り弁４０の調整により、同時に中央排水管
３３から取除かれた冷却水の一部を枝配管３７へ
分岐させる分量も弁３６及び４０により調整でき
るようになつており、又、水室３４内の隔壁３５
の取付けによつて、これらが水掻取器として作用
し、圧延物によつて冷却管３２へ随伴する圧力水
を掻取るように形成されているものである。 The cooling water pressure in the cooling section is also controlled by the control valve 36.
By adjusting the throttle valve 40 and the throttle valve 40, the amount of the cooling water removed from the central drain pipe 33 to be branched to the branch pipe 37 can also be adjusted by the valves 36 and 40. inner partition wall 35
By installing these, these act as a water scraper and are formed to scrape off the pressure water that accompanies the cooling pipe 32 due to the rolled product.
しかして、このように形成された装置によつて
圧延物は次の如く処理されるものである。 With the apparatus thus constructed, the rolled material is processed as follows.
すなわち、最終温度がおおよそ850℃〜1000℃
で10mm〜32mm程度の径の圧延物を、冷却管３２内
に冷却水を25m3／ｈ〜100m3／ｈの流量で流して
おいて、その中を通過させることで短時間に表面
温度を500℃〜700℃程度まで冷却するものであ
る。 That is, the final temperature is approximately 850℃~1000℃
Cooling water is passed through the cooling pipe 32 at a flow rate of 25 m 3 /h to 100 m 3 /h, and the surface temperature of the rolled product with a diameter of about 10 mm to 32 mm can be lowered in a short time by passing it through the cooling pipe 32. It cools down to about 500°C to 700°C.
その結果、圧延物の表面は組織がオーステナイ
トからマルテンサイトに変化し非常に高い硬度と
なる。そして、その後、冷却されていない内部の
熱が余熱となつて表面を再度加熱し焼戻し状態と
なり、高硬度で且つじん性に優れ、しかもスケー
ルの集積がない圧延物が得られるものである。 As a result, the structure of the surface of the rolled product changes from austenite to martensite, resulting in extremely high hardness. Thereafter, the uncooled internal heat becomes residual heat and heats the surface again, resulting in a tempered state, resulting in a rolled product with high hardness and excellent toughness, and without scale accumulation.
ところが、この装置によれば、前述の如く高硬
度且つじん性に優れた圧延物が非常に短時間で得
られるものの、その反面、冷却に使用する冷却水
の量も非常に多く、圧延物が通過した部分の近傍
の冷却水のみが熱を吸収して他の部分の冷却水に
熱が伝わりきれない状態で排出してしまうので、
冷却水の無駄が多く、使用する冷却水の量が多い
割にはそれほど冷却効率が優れているものとは言
えなかつた。 However, with this equipment, although a rolled product with high hardness and excellent toughness can be obtained in a very short time as described above, on the other hand, the amount of cooling water used for cooling is extremely large, and the rolled product is Only the cooling water near the area where the cooling water passes through absorbs heat and is discharged before the heat can be transferred to the cooling water in other areas.
There was a lot of wastage of cooling water, and the cooling efficiency could not be said to be that good considering the amount of cooling water used.
［発明の目的］
そこで、この発明は、上述した点に鑑み、前述
した高硬度で且つじん性に優れ、しかもスケール
の集積がない圧延物である圧延条鋼を、少量の冷
却水で且つ冷却効率良く、しかも短時間で得られ
るようにすることで、省エネルギーと条鋼製造の
コストダウンとを図ることを目的として創出され
たものである。[Object of the Invention] In view of the above-mentioned points, the present invention has been made to improve the cooling efficiency of the rolled bar steel, which is a rolled product having high hardness and excellent toughness and without scale accumulation, using a small amount of cooling water and cooling efficiency. It was created with the aim of saving energy and reducing the cost of manufacturing long steel by making it possible to obtain high quality steel in a short time.
［発明の概要］
如上の目的を達成するため、この発明は、熱間
圧延条鋼を挿入する水封機能付入口室と、前記圧
延条鋼を送出する水封機能付出口室と、この入口
室と出口室との間を連結し入口室からの圧延条鋼
を出口室へと挿通させる冷却管とからなり、この
冷却管には、前記入口室近傍と出口室近傍との間
を連通する迂回連通管を取付け、冷却管における
冷却管と迂回連通管との両分岐口間には冷却管内
に冷却水を供給する給水装置を設けると共に、冷
却管の適位置には冷却水を排出する排水装置を設
けたことに存するものである。[Summary of the Invention] In order to achieve the above-mentioned objects, the present invention provides an inlet chamber with a water-sealing function into which the hot-rolled long steel is inserted, an outlet chamber with a water-sealing function through which the rolled steel bar is sent out, and the inlet chamber and It consists of a cooling pipe that connects the outlet chamber and inserts the rolled steel strip from the inlet chamber into the outlet chamber, and the cooling pipe includes a detour communication pipe that communicates between the vicinity of the inlet chamber and the vicinity of the outlet chamber. A water supply device is installed between the branch ports of the cooling pipe and the detour communication pipe to supply cooling water into the cooling pipe, and a drainage device is installed at an appropriate position of the cooling pipe to discharge the cooling water. This is true.
［発明の実施例］
以下、図面を参照してこの発明の一実施例を説
明すると次の通りである。[Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings.
すなわち、図に示す符号１は水封機能を有する
入口室１であり、符号２は同じく水封機能を有す
る出口室２であり、入口室１と出口室２とは同様
の構造を有するものである。 That is, the reference numeral 1 shown in the figure is an inlet chamber 1 having a water seal function, and the reference numeral 2 is an outlet chamber 2 which also has a water seal function, and the inlet chamber 1 and the outlet chamber 2 have the same structure. be.
入口室１及び出口室２の構造は、その後端面略
中央に、先端部分３外周がテーパー状に細くな
り、且つ後端にフランジ４を設けしかも内径が先
端部分３において若干細くなつてゆき圧延条鋼
（図示せず）が通過するだけの径としたテーパー
管５を、先端部分３側から挿入してある。 The structure of the inlet chamber 1 and the outlet chamber 2 is such that the outer periphery of the tip portion 3 is tapered approximately at the center of the rear end surface, and a flange 4 is provided at the rear end, and the inner diameter becomes slightly thinner at the tip portion 3. A tapered tube 5 having a diameter large enough to pass through the tube (not shown) is inserted from the distal end portion 3 side.
そして、入口室１及び出口室２は、その後部内
を側面からの空気供給管６を有する空気室７と
し、この空気室７にテーパー管５が挿入するよう
に形成してあり、又、入口室１及び出口室２の前
端面略中央から空気室７までは条鋼通過孔８を開
穿し、挿入したテーパー管５の先端と同心となる
ように形成してある。しかも、条鋼通過孔８の空
気室７側開口端をテーパー管５の先端部分３外周
のテーパーと略同傾斜の漏斗状に拡開形成してお
き、挿入されたテーパー管５の先端部分３外周と
の間に若干のすき間をあくようにテーパー管５を
配して環状ノズル口９としてある。この場合に、
テーパー管５の後端は入口室１及び出口室２の外
部に突出させておき、フランジ４と入口室１の後
端面及び出口室２の後端面との間で調節ネジ１０
により離隔接近を行なわしめ環状ノズル口９のす
き間の間隔を調整するように形成してあり、又、
入口室１及び出口室２の側面からは条鋼通過孔８
まで排水口１１を開穿しておき、後記冷却管１２
からの冷却水を排出可能に形成してあるものであ
る。 The inlet chamber 1 and the outlet chamber 2 are formed into an air chamber 7 having an air supply pipe 6 from the side at the rear thereof, and a tapered pipe 5 is inserted into this air chamber 7. A bar passage hole 8 is opened from approximately the center of the front end surfaces of the air chamber 1 and the outlet chamber 2 to the air chamber 7, and is formed to be concentric with the tip of the inserted tapered pipe 5. Moreover, the open end of the bar passage hole 8 on the air chamber 7 side is expanded into a funnel shape having approximately the same slope as the taper on the outer periphery of the tip portion 3 of the tapered tube 5, and the outer periphery of the tip portion 3 of the tapered tube 5 inserted. A tapered pipe 5 is arranged with a slight gap between the nozzle opening 9 and the annular nozzle opening 9. In this case,
The rear end of the tapered pipe 5 is made to protrude outside the inlet chamber 1 and the outlet chamber 2, and an adjustment screw 10 is inserted between the flange 4 and the rear end surface of the inlet chamber 1 and the rear end surface of the outlet chamber 2.
The annular nozzle opening 9 is formed so as to allow the annular nozzle opening 9 to approach and separate from each other and adjust the gap between the annular nozzle openings 9.
From the side of the inlet chamber 1 and the outlet chamber 2 are bar passage holes 8.
Open the drain port 11 until the cooling pipe 12 described later.
It is designed to allow cooling water to be discharged from the tank.
そして、入口室１と出口室２とは、その前端面
同士を対峙させ、条鋼通過孔８同士を冷却管１２
にて連結するものである。 The inlet chamber 1 and the outlet chamber 2 have their front end surfaces facing each other, and the bar passage holes 8 are connected to the cooling pipe 12.
It is connected at .
冷却管１２には、この冷却管１２における入口
室１近傍と出口室２近傍との間を連通する迂回連
通管１３を取付け、又、冷却管１２における冷却
管１２と迂回連通管１３との両分岐口１４の間の
略中央には給水装置として給水室１５を設け、こ
の給水室１５には給水バルブ１６を介して給水管
１７より冷却水を供給するように形成されてい
る。そして、冷却管１２における給水室１５の両
側で前記分岐口１４近傍には、排水装置としてそ
れぞれ排水室１８を設け、この排水室１８から排
出される冷却水は排水バルブ１９を介して排水管
２０より排出するように形成されている。 A detour communication pipe 13 is attached to the cooling pipe 12 to communicate between the vicinity of the inlet chamber 1 and the vicinity of the outlet chamber 2 in the cooling pipe 12. A water supply chamber 15 is provided as a water supply device approximately in the center between the branch ports 14, and cooling water is supplied to the water supply chamber 15 from a water supply pipe 17 via a water supply valve 16. A drainage chamber 18 is provided as a drainage device on both sides of the water supply chamber 15 in the cooling pipe 12 near the branch port 14, and the cooling water discharged from the drainage chamber 18 is passed through a drainage valve 19 to the drainage pipe 20. It is designed to emit more water.
又、前記給水室１５における給水管１７からの
給水口２１は、給水室１５の下方に設けた方が供
給される冷却水とそれまでに使用されている熱を
奪い高温となつている冷却水とが混合せず冷却用
としては低温の冷却水を使用することができるの
で望ましく、排水室１８における冷却水の排水口
２２は、排水室１８の上方に設けた方が冷却する
ことで熱を奪つた高温の冷却水から先に排出する
ことができるので望ましい。 In addition, the water supply port 21 from the water supply pipe 17 in the water supply chamber 15 is provided below the water supply chamber 15, so that the cooling water that is supplied and the cooling water that has become high temperature by absorbing the heat that has been used up to that point. It is preferable that the cooling water drain port 22 in the drain chamber 18 is provided above the drain chamber 18 because it does not mix with the water and allows the use of low-temperature cooling water for cooling. This is desirable because the stolen high-temperature cooling water can be discharged first.
一方、冷却管１２の上方には、冷却管１２全体
にわたつて散水可能な散水設備２３を付設してお
き、前記冷却水を使用しないで圧延条鋼を冷却管
１２内へ送り通過させて冷却する際に、散水する
ことで冷却管１２の高温による歪みを発生させな
いようにするものである。 On the other hand, above the cooling pipe 12, a water sprinkling equipment 23 capable of sprinkling water over the entire cooling pipe 12 is attached, and the rolled steel bar is sent through the cooling pipe 12 and cooled without using the cooling water. At this time, by sprinkling water, distortion of the cooling pipe 12 due to high temperatures is prevented from occurring.
次に、これが使用を説明すると、次の通りであ
る。 Next, the use of this is explained as follows.
すなわち、先ず最初に、給水管１７から冷却水
を冷却管１２内に供給すると同時に、それぞれの
空気供給管６から圧縮空気を空気室７に送り込み
環状ノズル口９より内部に噴出させることで入口
室１と出口室２との内部において冷却管１２から
の冷却水を水封する。この場合に、調節ネジ１０
によつてテーパー管５を適宜移動させて環状ノズ
ル口９のすき間を調節することで圧縮空気の噴出
速度を調節し、入口室１と出口室２との内部にお
ける水封機能を確実なものとする。 That is, first of all, cooling water is supplied from the water supply pipe 17 into the cooling pipe 12, and at the same time, compressed air is fed into the air chamber 7 from each air supply pipe 6 and is ejected from the annular nozzle port 9 into the inlet chamber. The cooling water from the cooling pipe 12 is sealed inside the cooling pipe 1 and the outlet chamber 2. In this case, the adjustment screw 10
By appropriately moving the tapered pipe 5 and adjusting the gap between the annular nozzle orifice 9, the jet speed of the compressed air can be adjusted, and the water sealing function inside the inlet chamber 1 and the outlet chamber 2 can be ensured. do.
そこで、圧延条鋼の入口である入口室１のテー
パー管５の後方から圧延条鋼を高速で入口室１内
に送り込み冷却管１２を通過させ、出口室２にお
けるテーパー管５から送り出すものである。 Therefore, the rolled steel strip is fed into the entrance chamber 1 at high speed from behind the tapered pipe 5 of the inlet chamber 1, which is the inlet of the rolled steel strip, passes through the cooling pipe 12, and then sent out from the tapered pipe 5 in the outlet chamber 2.
そうすると、冷却管１２内に送り込まれた圧延
条鋼は、冷却水によつて急冷されながら冷却管１
２内の冷却水を出口室２方向に押圧してゆく。押
圧されていつた冷却水は出口室２における水封機
能により一部は出口室２の排水口１１から排出さ
れるが大部分は出口室２の手前、すなわち、出口
室２近傍の前記分岐口１４の周辺に高圧の状態で
存在することとなる。一方、入口室１近傍の前記
分岐口１４周辺の冷却水は、圧延条鋼によつて冷
却水が出口室２方向に押圧されてゆくので、低圧
の状態となる。そのため、大部分の冷却水は、出
口室２近傍の分岐口１４から迂回連通管１３を通
つて入口室１近傍の分岐口１４へと移動し、圧延
条鋼が冷却管１２内を通過するたびに迂回連通管
１３を介して循環するものである。 Then, the rolled steel bar fed into the cooling pipe 12 is rapidly cooled by the cooling water, and the rolled steel bar is fed into the cooling pipe 12.
The cooling water in 2 is pushed toward the outlet chamber in 2 directions. Due to the water sealing function in the outlet chamber 2, some of the pressed cooling water is discharged from the drain port 11 of the outlet chamber 2, but most of it is discharged from the branch port 14 in front of the outlet chamber 2, that is, near the outlet chamber 2. It will exist under high pressure around the area. On the other hand, the cooling water around the branch port 14 in the vicinity of the inlet chamber 1 is in a low pressure state because the coolant is pushed toward the outlet chamber 2 by the rolled bar steel. Therefore, most of the cooling water moves from the branch port 14 near the outlet chamber 2 through the detour communication pipe 13 to the branch port 14 near the inlet chamber 1, and each time the rolled steel bar passes through the cooling pipe 12, It circulates through the detour communication pipe 13.
その結果、冷却水は循環して再使用されるの
で、冷却水の使用量は非常に少なくなり、実際に
実験を行なつた結果、900℃〜1000℃程度の温度
の圧延条鋼を、その表面温度を600℃程度まで急
冷するために必要な冷却水は５m3／ｈ〜15m3／ｈ
で、その水圧は0.5気圧〜１気圧で十分であつた。
従つて、冷却水の量が少なくなつたことでコスト
が非常に低くなり、それに加え水圧が0.5気圧〜
１気圧で十分であるから、給水するための動力費
も非常に少なくて済むものである。 As a result, the cooling water is circulated and reused, so the amount of cooling water used is extremely small.As a result of actual experiments, it has been found that the surface The amount of cooling water required to rapidly cool the temperature to around 600℃ is 5m 3 /h to 15m 3 /h.
A water pressure of 0.5 to 1 atmosphere was sufficient.
Therefore, the cost is extremely low because the amount of cooling water is reduced, and in addition, the water pressure is 0.5 atm ~
Since 1 atm is sufficient, the power cost for water supply is also very low.
又、環状ノズル口９から水封のための圧縮空気
を噴出させているから、冷却水の中に小さな気泡
として噴出混入し、そのことにより冷却水を撹拌
することができるので非常に熱効率が良好となる
ものである。 In addition, since the compressed air for water sealing is ejected from the annular nozzle port 9, it is ejected and mixed into the cooling water as small bubbles, which allows the cooling water to be stirred, resulting in very good thermal efficiency. This is the result.
そして、給水装置を冷却管１２と迂回連通管１
３との分岐口１４同士の間の略中央に設けたこと
で、冷却水の給水を均等に且つ大きな動力を必要
とせず行なうことができる。 Then, the water supply device is connected to the cooling pipe 12 and the detour communication pipe 1.
By providing the cooling water approximately in the center between the branch ports 14 and 3, the cooling water can be supplied evenly and without requiring large power.
このようにして急冷された圧延条鋼は、表面が
オーステナイトからマルテンサイトに組織の変化
をきたし高硬度となるものである。その後、冷却
管１２から送り出された圧延条鋼は、内部はまだ
900℃前後の高温であるから、その余熱で表面が
再び加熱され、焼もどしの状態となつて圧延条鋼
の表面は高硬度、且つじん性を有する優れた材料
となる。 The surface of the rolled steel bar rapidly cooled changes from austenite to martensite and becomes highly hard. After that, the rolled steel bar sent out from the cooling pipe 12 is still inside.
Since the temperature is around 900°C, the surface is reheated by the residual heat and becomes tempered, making the surface of the rolled bar steel an excellent material with high hardness and toughness.
一方、圧延条鋼を冷却した冷却水の一部は、出
口室２の排水口１１、入口室１の排水口１１から
若干量排水バルブ１９を開くことにより排水室１
８を介して排水管２０より適量排出するものであ
る。 On the other hand, a portion of the cooling water that has cooled the rolled steel strip is released into the drain chamber 1 by opening the drain valve 19 from the drain port 11 of the outlet chamber 2 and the drain port 11 of the inlet chamber 1.
An appropriate amount is discharged from the drain pipe 20 via the drain pipe 8.
又、冷却水を使用しないで圧延条鋼を徐冷する
場合には、給水バルブ１６を閉じて冷却管１２内
の冷却水を排出させておいて、圧延条鋼を冷却管
１２内に送り込み通過させ自然冷却するものであ
る。その時に、圧延条鋼が900℃〜1000℃の高温
であるから、その熱により冷却管１２が歪むこと
がありその歪んだ冷却管１２は全く使いものにな
らなくなつてしまう危険があるが、散水設備２３
を付設して冷却管１２を冷却することができるの
で、前述した冷却水による急冷の場合と、自然冷
却との両方に使用が可能で汎用性に富むものであ
る。 In addition, when slowly cooling the rolled steel bar without using cooling water, the water supply valve 16 is closed to drain the cooling water in the cooling pipe 12, and the rolled steel bar is fed into the cooling pipe 12 and allowed to pass through it naturally. It is for cooling. At that time, since the rolled steel bar is at a high temperature of 900°C to 1000°C, the cooling pipe 12 may become distorted due to the heat, and there is a risk that the distorted cooling pipe 12 will become completely unusable. 23
Since the cooling pipe 12 can be cooled by attaching the cooling pipe 12, it can be used for both the above-mentioned rapid cooling using cooling water and natural cooling, and is highly versatile.
しかも、前述の如く形成した装置を直列に配し
ておけば、その使用する装置の台数を適宜設定す
ることで、表面積が大きく冷却され難い圧延条鋼
から表面積が小さく容易に冷却される圧延条鋼ま
であらゆる圧延条鋼に対応して適合することがで
きる。 Moreover, by arranging the devices formed as described above in series, by appropriately setting the number of devices used, it is possible to produce a variety of products ranging from rolled long steel with a large surface area that is difficult to cool to rolled long steel with a small surface area that is easily cooled. It can be adapted to any type of rolled steel.
更に、圧延の際に発生するスケールは、約800
℃程度の温度にて形成されるが、急冷して圧延条
鋼の表面を600℃程度にするのでスケールの集積
は無く、圧延条鋼の後処理である防錆処理、コー
テイング等を行なう際にスケールを剥離する必要
がないので後処理工程が容易となるものである。 Furthermore, the scale generated during rolling is approximately 800
Although it is formed at a temperature of about 30°F, there is no accumulation of scale because the surface of the rolled steel bar is rapidly cooled to about 600°C, and scale is removed during post-treatment of the rolled steel bar, such as antirust treatment and coating. Since there is no need to peel it off, the post-processing process becomes easy.
尚、圧延条鋼としては、丸棒、異形棒、各種型
鋼等があるが、冷却管１２はそれらに適した内周
断面形状のものを使用するものである。 Note that the rolled bar steel includes round bars, deformed bars, various steel shapes, etc., and the cooling pipe 12 has an inner circumferential cross-sectional shape suitable for these.
［発明の効果］
この発明は上述の如く構成したから、高温の圧
延条鋼の表面を急冷して焼入れを行ない、その圧
延条鋼の内部の余熱を利用して焼もどしを行なう
べく冷却する際に、使用する冷却水の量を非常に
少なくすることができ、しかも動力費も少なくて
済み、又、あらゆる圧延条鋼に対応させることが
できるようにすることで省エネルギー及びコスト
ダウンを図ることができるものである。[Effects of the Invention] Since the present invention is constructed as described above, when the surface of a hot rolled steel bar is rapidly cooled and quenched, and the remaining heat inside the rolled steel bar is used to cool the rolled steel bar for tempering, The amount of cooling water used can be extremely reduced, power costs are also low, and by being compatible with all types of rolled steel, it is possible to save energy and reduce costs. be.
すなわち、水封機能付入口室１と水封機能付出
口室２との間を連結し入口室１からの圧延条鋼を
出口室２へと挿通させ且つ冷却水を供給可能な冷
却管１２に、冷却管１２における入口室１近傍と
出口室２近傍との間を連通する迂回連通管１３を
取付け、冷却管１２と迂回連通管１３との両分岐
口１４間には給水装置と排水装置とを設け、入口
室１から出口室２へ冷却管１２を介して圧延条鋼
を通過させるように形成したから、冷却管１２内
において、圧延条鋼が通過するときに、圧延条鋼
の前方においては冷却水が押圧されて高圧となる
と共に、圧延条鋼の後方においては冷却水が低圧
となり、冷却水の一部は迂回連通管１３を介して
再び入口室１側の冷却管１２内に戻されて循環す
る。そのため、従来においては、圧延条鋼が900
℃〜1000℃と高温であるのに対し冷却水は最高温
度が100℃までしか上昇しないので、まだまだ冷
却するために使用可能な冷却水を直接排出させて
いたが、その無駄を、冷却効率との関係において
最小限に押えるようにすべく冷却水の再利用を可
能にした。 That is, the cooling pipe 12 connects the inlet chamber 1 with a water seal function and the outlet chamber 2 with a water seal function, allows the rolled steel bar from the inlet chamber 1 to pass through the outlet chamber 2, and is capable of supplying cooling water. A detour communication pipe 13 is installed to communicate between the vicinity of the inlet chamber 1 and the vicinity of the outlet chamber 2 in the cooling pipe 12, and a water supply device and a drainage device are installed between the branch ports 14 of the cooling pipe 12 and the detour communication pipe 13. Since the rolled steel strip is formed so as to pass from the inlet chamber 1 to the outlet chamber 2 via the cooling pipe 12, when the rolled steel strip passes through the cooling pipe 12, cooling water flows in front of the rolled steel strip. While being pressed to high pressure, the pressure of the cooling water becomes low at the rear of the rolled bar, and a portion of the cooling water is returned to the cooling pipe 12 on the inlet chamber 1 side via the detour communication pipe 13 and circulated. Therefore, in the past, rolled steel bars were
The maximum temperature of cooling water is only 100℃, whereas the maximum temperature of cooling water is between 1000℃ and 1000℃, so the usable cooling water was directly discharged for further cooling. In order to keep this to a minimum, we have made it possible to reuse cooling water.
しかも、圧延条鋼の移動を利用して冷却水を循
環させるのでその分の動力を全く必要とせず、し
かも、冷却水も0.5気圧〜１気圧という低い圧力
で給水装置から供給すれば良いので、そのための
動力費も非常に少ないもので済むのである。そし
て、その冷却効率は、冷却水の一部を循環させ、
そこに新しい冷却水を供給してゆくので、少量の
冷却水と少ない動力費で従来のものの冷却効率と
ほとんど同じものが得られた。 Moreover, since the cooling water is circulated using the movement of the rolled steel strip, no power is required at all, and the cooling water can be supplied from the water supply device at a low pressure of 0.5 atm to 1 atm. Power costs are also very low. And, its cooling efficiency is achieved by circulating some of the cooling water,
Since new cooling water is supplied to the system, it is possible to achieve almost the same cooling efficiency as the conventional system using only a small amount of cooling water and low power costs.
以上説明したように、この発明によれば、非常
に簡単な構造のもので、省エネルギー、コストダ
ウンを図つた圧延を行なうことができ、得られた
圧延条鋼は、その表面が高硬度且つじん性に富ん
だ材料となると共に、その表面にスケールが集積
しないので後処理である防錆処理、コーテイング
等が容易となるものであり、複数台直列に配すれ
ば、あらゆる圧延条鋼に対応して適正な冷却を可
能にする等の種々の優れた効果を奏するものであ
る。 As explained above, according to the present invention, it is possible to carry out rolling with a very simple structure that saves energy and reduces costs, and the obtained rolled steel strip has a surface with high hardness and toughness. In addition to being a material rich in carbon dioxide, scale does not accumulate on its surface, making post-treatment such as anti-corrosion treatment and coating easy.If multiple units are arranged in series, it can be used appropriately for all types of rolled steel. This provides various excellent effects such as enabling efficient cooling.
第１図はこの発明の一実施例を示す正断面概略
図、第２図は従来の圧延物特に棒材の冷却を制御
するための装置の正面概略図である。
１…入口室、２…出口室、３…先端部分、４…
フランジ、５…テーパー管、６…空気供給管、７
…空気室、８…条鋼通過孔、９…環状ノズル口、
１０…調節ネジ、１１…排水口、１２…冷却管、
１３…迂回連通管、１４…分岐口、１５…給水
室、１６…給水バルブ、１７…給水管、１８…排
水室、１９…排水バルブ、２０…排水管、２１…
給水口、２２…排水口、２３…散水設備、３１…
ノズルヘツド、３２…冷却管、３３…中央排水
管、３４…水室、３５…隔壁、３６…制御弁、３
７…枝配管、３８…溢流路、３９…排水管、４０
…絞り弁。
FIG. 1 is a schematic front cross-sectional view showing one embodiment of the present invention, and FIG. 2 is a schematic front view of a conventional device for controlling cooling of rolled products, particularly bar materials. 1... Entrance chamber, 2... Outlet chamber, 3... Tip part, 4...
Flange, 5...Tapered pipe, 6...Air supply pipe, 7
... Air chamber, 8... Bar passing hole, 9... Annular nozzle opening,
10...adjustment screw, 11...drain port, 12...cooling pipe,
13...Detour communication pipe, 14...Branch port, 15...Water supply chamber, 16...Water supply valve, 17...Water supply pipe, 18...Drain chamber, 19...Drain valve, 20...Drain pipe, 21...
Water supply port, 22... Drain port, 23... Watering equipment, 31...
Nozzle head, 32... Cooling pipe, 33... Central drain pipe, 34... Water chamber, 35... Partition wall, 36... Control valve, 3
7... Branch pipe, 38... Overflow path, 39... Drain pipe, 40
...throttle valve.
Claims (1)
と、前記圧延条鋼を送出する水封機能付出口室
と、この入口室と出口室との間を連結し入口室か
らの圧延条鋼を出口室へと挿通させる冷却管とか
らなり、この冷却管には、前記入口室近傍と出口
室近傍との間を連通する迂回連通管を取付け、冷
却管における冷却管と迂回連通管との両分岐口間
には冷却管内に冷却水を供給する給水装置を設け
ると共に、冷却管の適位置には冷却水を排出する
排水装置を設けたことを特徴とする熱間圧延条鋼
等の表面強化のための冷却装置。 ２ 冷却管の外部には、冷却管を冷却するための
散水設備の如き冷却装置を付設した特許請求の範
囲第１項記載の熱間圧延条鋼等の表面強化のため
の冷却装置。 ３ 給水装置は、冷却管における冷却管と迂回連
通管との両分岐口間の略中央に設けた特許請求の
範囲第１項又は第２項記載の熱間圧延条鋼等の表
面強化のための冷却装置。 ４ 水封機能は、空気を内部に噴出させることに
よつて行う特許請求の範囲第１項又は第２項又は
第３項記載の熱間圧延条鋼等の表面強化のための
冷却装置。[Scope of Claims] 1. An inlet chamber with a water seal function into which the hot rolled long steel is inserted, an outlet chamber with a water seal function through which the rolled steel bar is sent out, and an inlet chamber connecting the inlet chamber and the outlet chamber. A cooling pipe for inserting the rolled steel strip into the exit chamber, and a detour communication pipe is attached to this cooling pipe to communicate between the vicinity of the inlet chamber and the vicinity of the exit chamber, and the cooling pipe and the detour in the cooling pipe are connected to each other. A hot-rolled long steel characterized in that a water supply device for supplying cooling water into the cooling pipe is provided between both branch ports with the communicating pipe, and a drainage device for discharging the cooling water is provided at an appropriate position of the cooling pipe. Cooling device for surface reinforcement etc. 2. A cooling device for strengthening the surface of a hot-rolled bar or the like as set forth in claim 1, wherein a cooling device such as a water sprinkler for cooling the cooling pipe is attached to the outside of the cooling pipe. 3. The water supply device is provided approximately at the center between the branch ports of the cooling pipe and the detour communication pipe for strengthening the surface of hot rolled steel bars, etc. as set forth in claim 1 or 2. Cooling system. 4. A cooling device for strengthening the surface of hot-rolled steel strips, etc., as set forth in claim 1, 2, or 3, wherein the water-sealing function is performed by blowing air inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22860084A JPS61106727A (en) | 1984-10-30 | 1984-10-30 | Cooler for surface strengthening of hot rolled steel bar or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22860084A JPS61106727A (en) | 1984-10-30 | 1984-10-30 | Cooler for surface strengthening of hot rolled steel bar or the like |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61106727A JPS61106727A (en) | 1986-05-24 |
| JPS6325056B2 true JPS6325056B2 (en) | 1988-05-24 |
Family
ID=16878891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22860084A Granted JPS61106727A (en) | 1984-10-30 | 1984-10-30 | Cooler for surface strengthening of hot rolled steel bar or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61106727A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0549476B1 (en) * | 1991-12-24 | 1998-09-23 | Tokyo Gas Co., Ltd. | Surface combustion burner |
| JP5305192B2 (en) * | 2008-06-26 | 2013-10-02 | 高周波熱錬株式会社 | Steel bar coating equipment |
-
1984
- 1984-10-30 JP JP22860084A patent/JPS61106727A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61106727A (en) | 1986-05-24 |
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