KR920009036B1 - Method of cooling a moving metal product - Google Patents
Method of cooling a moving metal product Download PDFInfo
- Publication number
- KR920009036B1 KR920009036B1 KR1019850006977A KR850006977A KR920009036B1 KR 920009036 B1 KR920009036 B1 KR 920009036B1 KR 1019850006977 A KR1019850006977 A KR 1019850006977A KR 850006977 A KR850006977 A KR 850006977A KR 920009036 B1 KR920009036 B1 KR 920009036B1
- Authority
- KR
- South Korea
- Prior art keywords
- cooling
- product
- water
- space
- moving metal
- Prior art date
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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
- B21B45/02—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 for lubricating, cooling, or cleaning
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
-
- 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
- B21B45/02—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 for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Continuous Casting (AREA)
Abstract
내용 없음.No content.
Description
본 발명은 이동중인 금속제품을 냉각시키는 방법에 관한 것이다.The present invention relates to a method of cooling a moving metal product.
본 발명은 예를 들면, 금속판, 형강 또는 레일과 같이 압연 롤러에서 나오는 금속제품 뿐 아니라, 슬랩(slab) 또는 빌렛(billet)과 같이 연속적으로 주조되는 제품에도 응용된다.The invention applies not only to metal products coming from rolling rollers, for example metal plates, section steels or rails, but also to products that are continuously cast, such as slabs or billets.
이러한 주조된 또는 압연된 제품의 냉각문제는 제품의 구조를 일정하게 유지하고, 시간이 경과함에 따라 균일하게 정상적으로 변화시키는 전제가 되기 때문에, 특별한 관심의 대상이 되고 있다.The cooling problem of the cast or rolled product is of particular interest because it is a premise that the structure of the product remains constant and changes uniformly and normally over time.
이와 같이 관점에서, 전술한 냉각을 보장하기 위하여 가장 많이 사용되는 방법은 압연되는 제품에 적당한 장치를 이용하여 공기, 물, 수증기 등과 같은 적합한 냉각제를 단독으로 또는 이들을 혼합하여 사출하는 것이다.In view of this, the most frequently used method to ensure the above-mentioned cooling is to inject a suitable coolant such as air, water, water vapor, etc. alone or in combination by using a suitable device for the product to be rolled.
본 출원인은 벨기에 왕국 특허 제851, 381호에서 공기에 미립자상으로 혼합된 물을 제품의 표면에 사출하는 방식으로 제품에 분무함으로써 이를 냉각시키게 되어 있는 장치를 이미 제안한 바 있다. 이 장치는 원하는 냉각을 만족스럽게 실현시킬 수 있으나, 냉각 대상 제품의 폭에 따라 장치의 폭도 그만큼 크게 하여야 한다는 단점이 있다. 우선 이 장치를 이용하려면 다량의 압축 공기가 필요한데, 대형 제품의 경우에는 이로인하여 운영비가 크게 증가하게 된다. 더구나, 길이가 매우 긴 장치내에서는 압력강하의 차로 인하여 냉각공기와 냉각수의 유량의 균일한 분포를 유지하는 것이 곤란하다.Applicant has already proposed in Belgian Kingdom Patent Nos. 851, 381 a device which is intended to cool a product by spraying it on the surface of the product by injecting water mixed in particulate form into the air. This apparatus can satisfactorily achieve the desired cooling, but has the disadvantage that the width of the apparatus must be made according to the width of the product to be cooled. First of all, the device requires a large amount of compressed air, which in the case of large products will greatly increase the operating costs. Moreover, it is difficult to maintain a uniform distribution of the flow rate of cooling air and cooling water due to the difference in pressure drop in a very long apparatus.
본 발명은 전술한 단점을 제거할 수 있는 방법을 그 목적으로 한다.The present invention aims at a method capable of eliminating the above disadvantages.
본 발명에 의한 방법은 계속적으로 공급되는 물을 이용하여 이동중인 금속제품을 냉각시키는 것으로서, 냉각 대상 제품의 일부분과 대향하도록 적어도 하나 이상의 구멍을 갖는 격벽을 배치함으로써 일정한 두께의 공간이 형성되고, 냉각대상 제품의 일부표면과 구멍을 갖는 격벽의 표면이 서로 평행이 되도록 배치하고, 상기 공간이 물로 완전히 충전되도록 격벽에 형성된 구멍 또는 구멍들을 거쳐 물을 공간내로 유입시켜 공간에 충전된 상기 방식으로 공급되는 물 자체에 의하여 교반되는 것이 특징이다. 물은 상기 공간내에 이하에 설명된 소정의 유량비로 끊임없이 공급되고 배출된다. 본 출원인의 실험에 의하면, 물의 연속 공급에 따른 내부에서의 물의 교반 및 순환에 의한 난류때문에, 물의 1% 이하만이 제품과의 접촉에 의하여 증발되며, 제품면과 접촉하는 층이 난류에 의하여 끊임없이 교반되기 때문에 국부 가열층이 발생되지 않는 것으로 밝혀졌다. 결과적으로 본 발명에 의한 방법에서 수증기의 제거에 관한 문제는 발생되지 않는다.The method according to the present invention cools a moving metal product by using continuously supplied water, wherein a space having a constant thickness is formed by arranging a partition wall having at least one or more holes so as to face a portion of the product to be cooled. Partial surfaces of the target product and the surface of the partition wall having holes are arranged in parallel with each other, and the water is supplied into the space through the holes or holes formed in the partition wall so that the space is completely filled with water and supplied into the space. It is characterized by being agitated by water itself. Water is continuously supplied and discharged into the space at a predetermined flow rate ratio described below. Applicants' experiments show that, due to turbulence by stirring and circulating the water within the continuous supply of water, less than 1% of the water is evaporated by contact with the product, and the layer in contact with the product surface is constantly It was found that no localized heating layer was generated because of the agitation. As a result, no problem arises with respect to the removal of water vapor in the process according to the invention.
바람직하게는 물의 유량비는 5ℓ/m2ㆍsec 내지 80ℓ/m2ㆍsec이고, 냉각 대상 제품 표면과 격벽 사이의 거리는 5mm 내지 300mm이다. 상기 유량비 및 거리의 범위는 실험 결과에 따라 선택되었다. 5ℓ/m2ㆍsec이하의 유량비는 불안정하고 제어하기 어려우며 불균일한 냉각 효과를 발생한다. 80ℓ/m2ㆍsec이상에서는 유량비가 증가해도 냉각 효율의 뚜렷한 증가가 일어나지 않는다. 상기 거리는 적어도 5mm는 되어야 하며 이는 제품이 항상 불규칙한 표면을 가지며 냉각 설비를 손상시키지 않기 위한 최소한의 안전 거리를 유지하는 것이 필요하기 때문이다. 상기 거리가 300mm 이상이 되면 난류 현상이 감소되므로 냉각 효율을 증가시키지 않기 때문이다.Preferably, the flow rate ratio of water is 5 l / m 2 · sec to 80 l / m 2 · sec, and the distance between the surface to be cooled and the partition wall is 5 mm to 300 mm. The flow rate ratio and range of distance were selected according to the experimental results. Flow rate ratio below 5ℓ / m 2 ㆍ sec is unstable, difficult to control, and produces non-uniform cooling effect. Above 80 l / m 2 · sec, no significant increase in cooling efficiency occurs even if the flow rate ratio increases. The distance should be at least 5 mm because the product always has an irregular surface and it is necessary to maintain a minimum safety distance in order not to damage the cooling installation. If the distance is 300mm or more, turbulence is reduced, so that the cooling efficiency is not increased.
구체적으로, 실제 유량비와 거리는 금속 제품에 가하여지는 냉각의 강도에 따라 상기 범위내에서 선택된다.Specifically, the actual flow rate and distance are selected within this range depending on the strength of the cooling applied to the metal product.
본 발명에 의한 방법은 얻고자 하는 제품의 종류에 따라, 이에 가하는 냉각 강도를 변경할 수 있다. 또한, 필요에 따라서는 연강 제품 또는 표면층만이 처리되는, 담금질 과정을 거쳐 자체 뜨임되는(Self-tempered)제품을 만들도록 냉각시킬 수 있다.According to the method of the present invention, the cooling strength to be applied thereto can be changed according to the type of product to be obtained. In addition, if desired, it may be cooled to produce a self-tempered product through a quenching process where only mild steel products or surface layers are treated.
본 발명에 의한 방법의 실시예를 들어보면 다음과 같다.Examples of the method according to the invention are as follows.
[실시예 1]Example 1
강판의 상,하부에 위치한(분배기, 파이프 등의) 냉각 장치를 포함하는 냉각 설비 내에서의 열간 압연기로 부터 나오는 강판의 처리Treatment of steel sheets from hot rolling mills in cooling installations including cooling devices (distributors, pipes, etc.) located above and below the steel plates
a ba b
-강판의 두께(mm) 20 11-Thickness of steel sheet (mm) 20 11
-진행 속도(m/sec) 1.4 2.6Travel speed (m / sec) 1.4 2.6
-냉각설비내로 들어갈 때의 온도(℃) 850 850Temperature when entering cooling system (℃) 850 850
-설비의 유량비(ℓ/m2×sec) 50 12Flow rate of equipment (ℓ / m 2 × sec) 50 12
-하부 분배기와 강판 하부면 사이의 거리(mm) 50 50-Distance between bottom distributor and bottom of steel sheet (mm) 50 50
-상부 분배기와 강판 상부면 사이의 거리(mm) 80 280-Distance between the upper distributor and the upper surface of the steel sheet (mm) 80 280
-설비에서 나올 때의 온도(℃) 580 680Temperature when leaving the facility (℃) 580 680
-결과 담금질 및 자체 뜨임된 철판 입자가 정련된 강판-Steel sheet refined with quenched and self-tempered iron sheet particles
[실시예 2]Example 2
플랜지의 두께가 50mm인 빔의 냉각Cooling of beam with 50 mm thickness of flange
850℃의 온도의 빔을 0.7m/sec의 속도로, 제품과 면과 냉각 시스템의 면사이의 간격이 10mm이고 물의 냉각 유량비가 20ℓ/m2ㆍsec인 냉각 설비안으로 도입함으로써 담금질 및 자체 뜨임된 빔을 제조할 수 있었다. 출구에서의 빔의 온도는 575℃이다.Quenching and self tempering by introducing a beam at a temperature of 850 ° C. at a rate of 0.7 m / sec into a cooling installation with a 10 mm gap between the product and the face and the face of the cooling system and a cooling flow rate of water of 20 l / m 2 · sec. The beam could be manufactured. The temperature of the beam at the outlet is 575 ° C.
Claims (1)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE6/48.011 | 1984-09-25 | ||
| BE6/48,011 | 1984-09-25 | ||
| BE6/48011A BE900675A (en) | 1984-09-25 | 1984-09-25 | Cooling moving metal product - by turbulent water flow over plane surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860002310A KR860002310A (en) | 1986-04-24 |
| KR920009036B1 true KR920009036B1 (en) | 1992-10-13 |
Family
ID=3874959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019850006977A KR920009036B1 (en) | 1984-09-25 | 1985-09-24 | Method of cooling a moving metal product |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0176494A1 (en) |
| JP (1) | JPS6184318A (en) |
| KR (1) | KR920009036B1 (en) |
| AU (1) | AU580630B2 (en) |
| CA (1) | CA1262671A (en) |
| DK (1) | DK431685A (en) |
| ES (1) | ES8608966A1 (en) |
| MX (1) | MX162893B (en) |
| ZA (1) | ZA857320B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE900784A (en) * | 1984-10-09 | 1985-04-09 | Centre Rech Metallurgique | DEVICE FOR COOLING A MOVING METAL PRODUCT AND INSTALLATION COMPRISING THE APPLICATION. |
| EP1938911A1 (en) | 2006-12-27 | 2008-07-02 | VAI Industries (UK) Ltd. | Apparatus and method for controlled cooling |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE565352A (en) * | ||||
| AU413048B1 (en) * | 1966-08-09 | 1971-05-11 | Olin Mathieson Chemical Corporation | Apparatus for cooling sheet or strip metal |
| US3531334A (en) * | 1966-10-10 | 1970-09-29 | Inland Steel Co | Quench system |
| IT958180B (en) * | 1972-05-31 | 1973-10-20 | Centro Speriment Metallurg | DEVICE FOR COOLING BODIES IN PARTICULAR METALLIC |
| JPS5311247A (en) * | 1976-07-19 | 1978-02-01 | Hitachi Ltd | Pinion clutch transfer mechanism for starter |
| JPS5830377A (en) * | 1981-08-17 | 1983-02-22 | ティーディーケイ株式会社 | Apparatus for supporting ultrasonic vibrator |
| BE900675A (en) * | 1984-09-25 | 1985-03-25 | Centre Rech Metallurgique | Cooling moving metal product - by turbulent water flow over plane surface |
-
1985
- 1985-09-16 EP EP85870124A patent/EP0176494A1/en not_active Withdrawn
- 1985-09-24 DK DK854316A patent/DK431685A/en not_active Application Discontinuation
- 1985-09-24 AU AU47844/85A patent/AU580630B2/en not_active Ceased
- 1985-09-24 KR KR1019850006977A patent/KR920009036B1/en not_active IP Right Cessation
- 1985-09-24 ES ES547251A patent/ES8608966A1/en not_active Expired
- 1985-09-24 JP JP60210917A patent/JPS6184318A/en active Pending
- 1985-09-24 ZA ZA857320A patent/ZA857320B/en unknown
- 1985-09-24 CA CA000491395A patent/CA1262671A/en not_active Expired
- 1985-10-01 MX MX119A patent/MX162893B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA857320B (en) | 1986-05-28 |
| CA1262671A (en) | 1989-11-07 |
| ES547251A0 (en) | 1986-07-16 |
| EP0176494A1 (en) | 1986-04-02 |
| AU4784485A (en) | 1986-04-10 |
| MX162893B (en) | 1991-07-08 |
| ES8608966A1 (en) | 1986-07-16 |
| AU580630B2 (en) | 1989-01-19 |
| DK431685D0 (en) | 1985-09-24 |
| KR860002310A (en) | 1986-04-24 |
| DK431685A (en) | 1986-03-26 |
| JPS6184318A (en) | 1986-04-28 |
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| FPAY | Annual fee payment |
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