US20080277035A1 - Method and Device for Quenching Flat Steel Products - Google Patents

Method and Device for Quenching Flat Steel Products Download PDF

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Publication number
US20080277035A1
US20080277035A1 US11/664,444 US66444405A US2008277035A1 US 20080277035 A1 US20080277035 A1 US 20080277035A1 US 66444405 A US66444405 A US 66444405A US 2008277035 A1 US2008277035 A1 US 2008277035A1
Authority
US
United States
Prior art keywords
passage
suction
flat steel
steel products
water
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.)
Abandoned
Application number
US11/664,444
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English (en)
Inventor
Friedhelm Kuhn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOI Thermprocess GmbH
Original Assignee
LOI Thermprocess GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LOI Thermprocess GmbH filed Critical LOI Thermprocess GmbH
Publication of US20080277035A1 publication Critical patent/US20080277035A1/en
Abandoned legal-status Critical Current

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    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • 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
    • 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
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • 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
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0281—Cleaning devices removing liquids removing coolants
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents

Definitions

  • the invention relates to a method and an apparatus for quenching flat steel products.
  • the main field of application of the invention is the quenching of plates of carbon steel. Frequent references are therefore made in the following description to metal plates but this is not to be seen as a limitation.
  • the invention provides a method of quenching flat steel products, wherein
  • the invention is based on the recognition that a certain “sluice effect” is produced between adjacent rollers which result in an increase in the water height on the surface of the plate.
  • the “sluice effect” can also occur between a nozzle box and the first upper roller situated downstream of it, which is frequently a spiral roller.
  • the increase in the water level has a negative influence on the uniform cooling of the plates over the breadth of the plate and also over the length of the plate. It contributes to making the uniform flowing away of the water over the side edges of the plate more difficult. This applies, in particular, when the plates are very broad.
  • the “sluice effect” is dependent on the amount of water per unit time and per square metre of plate surface.
  • the invention improves the water drainage by removing the increased water level by suction and contributes to homogenisation of the cooling of the plates over the plate breadth and also over the plate length.
  • the removal of the water by suction is preferably effected upstream of the first upper roller situated downstream of the spraying location.
  • the effect of the increase in the water level is strongest at this point since the water has only a small opportunity of previously flowing away laterally over the side edges of the plate.
  • the water removed by suction is preferably conducted away on both sides, with respect to the direction of movement of the flat products.
  • the invention further provides an apparatus for quenching flat steel products including
  • the invention preferably finds application in the first water quenching device in a continuous quencher for cooling plates of carbon steel.
  • the nozzle device is preferably a high pressure slot nozzle with a subsequent spiral roller. It is accordingly proposed in one embodiment of the invention that the suction removal device be arranged upstream of a spiral roller.
  • the spiral roller serves to convey the water laterally to the side edges of the plate. The suction removal of water in accordance with the invention thus promotes the drainage of water after the cooling process.
  • high pressure slot nozzle assemblies with spiral rollers arranged between them can follow the high pressure slot nozzle.
  • These high pressure nozzle assemblies also constitute nozzle devices within the meaning of the invention, upstream of whose downstream rollers, optionally spiral rollers, the removal of water by suction can occur.
  • the suction removal device includes a first passage, which receives the water to be removed and communicates at the top with a second passage, wherein the first passage has a constant cross-section in the upward direction over the breadth of the flat products and wherein the second passage constitutes two sections, each of which broadens from the centre of the flat products to the side and is connected to an associated suction pump.
  • the first passage thus results in a very uniform removal by suction of the increased water level over the breadth of the plates and the second passage ensures that the removed water can be conducted away to both sides.
  • each section of the second passage broadens such that its cross-sectional area at each position is at least as large as the total cross-sectional area of the first passage calculated from the centre of the flat products to that position. It is thus ensured with certainty that no backflow can occur at the transition between the two passages.
  • the breadth of the first passage is matchable to the breadth of the flat products. This offers the possibility of using the apparatus in accordance with the invention on plates of differing breadth.
  • the breadth of the first passage should not exceed the breadth of the plate since otherwise air is sucked in which at least impairs the removal of water.
  • the first passage In order to adjust the first passage, there is the possibility of constructing its side walls so as to be laterally movable whilst maintaining a seal with respect to the second passage.
  • the first passage can be divided into sections which may be separately shut off.
  • the distance of the suction opening to the flat products be selected to be smaller than 10% of its breadth.
  • the first passage is preferably constructed in the form of a slot passage, the height of which is not more than ten times the slot thickness. It has been found that reliable, stable suction conditions may be achieved in this manner.
  • the first passage is preferably defined between a nozzle box of the nozzle device and an associated wall.
  • suction pumps in the form of self-priming pumps.
  • a more rapid start may, however, be effected if a vacuum device is associated with the suction pumps.
  • the suction pumps are preferably connected to a nozzle device situated downstream.
  • the latter operates in the low pressure quenching region of the quencher.
  • the removal of water by vacuum in accordance with the invention thus results in a reduction in the overall water consumption of the quencher, which is an additional advantage.
  • FIG. 1 is a schematic vertical longitudinal sectional view of an apparatus in accordance with the invention
  • FIG. 2 is a plan view of the apparatus of FIG. 1 .
  • a roller conveyor which includes lower rollers 1 and upper rollers 2 .
  • the upper rollers also include a spiral roller 3 .
  • the roller conveyor serves to conduct flat products 4 , in the present case plates of carbon steel, which are quenched with the apparatus in accordance with the invention and by the method in accordance with the invention, through a continuous quencher.
  • the apparatus in accordance with the invention includes a nozzle device 5 in the form of a high pressure slot nozzle, which is arranged above the roller conveyor and transversely to it and with which water is sprayed onto the metal plate. After the cooling process, the water should flow away on both sides over the side edges of the metal plate. This process is promoted by the spiral roller 3 . However, an increase in height of the water on the plate surface occurs between the nozzle block 6 of the high pressure slot nozzle and the spiral roller 3 as a result of a “sluice effect”. This is removed by suction through a first passage 7 , which communicates with a second passage 8 . As may be seen in FIG.
  • the second passage 8 consists of two sections 9 and 10 , which extend from the centre of the plate to each side and are connected to an associated pump.
  • the accumulated water is thus removed upwardly by suction, in the present case vertically upwardly, and then conducted away to both sides.
  • the two sections 9 and 10 of the second passage 8 broaden in the outward direction in order to conduct away the water supplied by the first passage 7 , the total amount of which increases in the outward direction, without backflow.
  • the first passage 7 is defined between the nozzle box 6 and a wall 12 . It constitutes a slit passage of constant cross-section, the suction opening of which is situated so closely above the plate that it is reliably submerged in the accumulated water.
  • the breadth of the first passage 7 is matched to the breadth of the plate in order to prevent air being sucked in at the sides.
  • the breadth of the first passage 7 is reduced, for instance by moving the side walls of the passage (whilst sealing the lateral regions of the second passage 8 ) which become exposed or by closing off individual chambers, into which the first passage may optionally be divided.
  • the first passage 7 can also be arranged downstream of the spiral roller 3 .
  • a vacuum device can be associated with the suction pumps 11 . Furthermore, the water supplied by the suction pumps 11 can be conducted in the low pressure quenching region of the quencher back onto the plate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)
US11/664,444 2004-10-19 2005-09-16 Method and Device for Quenching Flat Steel Products Abandoned US20080277035A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004051047.4 2004-10-19
DE102004051047A DE102004051047A1 (de) 2004-10-19 2004-10-19 Verfahren und Vorrichtung zum Abschrecken von Flachprodukten aus Stahl
PCT/EP2005/010015 WO2006042601A1 (de) 2004-10-19 2005-09-16 Verfahren und vorrichtung zum abschrecken von flachprodukten aus stahl

Publications (1)

Publication Number Publication Date
US20080277035A1 true US20080277035A1 (en) 2008-11-13

Family

ID=35717592

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/664,444 Abandoned US20080277035A1 (en) 2004-10-19 2005-09-16 Method and Device for Quenching Flat Steel Products

Country Status (8)

Country Link
US (1) US20080277035A1 (ko)
EP (1) EP1805332A1 (ko)
JP (1) JP2008516777A (ko)
KR (1) KR100916192B1 (ko)
CN (1) CN101035913B (ko)
DE (1) DE102004051047A1 (ko)
RU (1) RU2007118673A (ko)
WO (1) WO2006042601A1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110184431A (zh) * 2018-05-21 2019-08-30 江阴兴澄特种钢铁有限公司 避免钢板表面产生纵向淬火条印的淬火机辊道布置结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011114150B4 (de) * 2010-09-23 2015-06-11 Kocks Technik Gmbh & Co. Kg Walzanlage für ein Rohr und Kühlvorrichtung für ein Rohr
CN102049357B (zh) * 2010-12-23 2012-07-25 中冶京诚工程技术有限公司 缝隙式喷头冷却装置
CN104313273B (zh) * 2014-10-08 2016-09-14 中冶赛迪工程技术股份有限公司 一种自吸式喷嘴

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793867A (en) * 1971-09-22 1974-02-26 Drever Co Apparatus for continuously quenching a heated metal plate
US4477287A (en) * 1983-02-08 1984-10-16 Kaiser Aluminum & Chemical Corporation Liquid removal device
US6142003A (en) * 1998-11-04 2000-11-07 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for cooling hot-rolled rolling stock, particularly hot-rolled wide strip

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3313024A1 (de) * 1983-04-12 1984-10-18 Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld Verfahren und vorrichtung zum abschrecken von durchlaufenden stahlblechen, insbesondere von grob- oder mittelblechen, unter gleichzeitigem kontrolliertem richten
JPS6340611A (ja) * 1986-08-04 1988-02-22 Kawasaki Steel Corp 高温鋼板の冷却装置
JPH078373B2 (ja) * 1986-12-29 1995-02-01 石川島播磨重工業株式会社 金属板の冷却装置
EP0513632B1 (de) * 1991-05-17 1995-07-19 SUNDWIGER EISENHÜTTE MASCHINENFABRIK GmbH & CO. Vorrichtung zum Entfernen von Flüssigkeit von der Oberfläche eines bewegten Bandes
CN2286755Y (zh) * 1996-03-14 1998-07-29 马玉璞 一种辊式余热汽水冷却和淬火装置
CN2303697Y (zh) * 1996-04-18 1999-01-13 陈增琪 半闭路循环式喷水冷却结晶器
DE20114136U1 (de) * 2001-08-27 2001-11-29 Loi Thermprocess Gmbh Vorrichtung zum Kühlen von Material durch Erzeugen eines Flachstrahls
AUPR949801A0 (en) * 2001-12-14 2002-01-24 Industrial Automation Services Pty Ltd Process control method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793867A (en) * 1971-09-22 1974-02-26 Drever Co Apparatus for continuously quenching a heated metal plate
US4477287A (en) * 1983-02-08 1984-10-16 Kaiser Aluminum & Chemical Corporation Liquid removal device
US6142003A (en) * 1998-11-04 2000-11-07 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for cooling hot-rolled rolling stock, particularly hot-rolled wide strip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110184431A (zh) * 2018-05-21 2019-08-30 江阴兴澄特种钢铁有限公司 避免钢板表面产生纵向淬火条印的淬火机辊道布置结构

Also Published As

Publication number Publication date
RU2007118673A (ru) 2008-11-27
WO2006042601A1 (de) 2006-04-27
JP2008516777A (ja) 2008-05-22
CN101035913A (zh) 2007-09-12
EP1805332A1 (de) 2007-07-11
KR100916192B1 (ko) 2009-09-08
CN101035913B (zh) 2010-05-05
DE102004051047A1 (de) 2006-04-27
KR20070068383A (ko) 2007-06-29

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