EP0462957A2 - Dispositif pour le refroidissement accéléré d'un produit métallique en mouvement - Google Patents

Dispositif pour le refroidissement accéléré d'un produit métallique en mouvement Download PDF

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Publication number
EP0462957A2
EP0462957A2 EP91870091A EP91870091A EP0462957A2 EP 0462957 A2 EP0462957 A2 EP 0462957A2 EP 91870091 A EP91870091 A EP 91870091A EP 91870091 A EP91870091 A EP 91870091A EP 0462957 A2 EP0462957 A2 EP 0462957A2
Authority
EP
European Patent Office
Prior art keywords
channel
curtains
coolant
metal product
forming
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.)
Withdrawn
Application number
EP91870091A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0462957A3 (enrdf_load_stackoverflow
Inventor
Stéphan Wilmotte
Jean-François Noville
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0462957A2 publication Critical patent/EP0462957A2/fr
Publication of EP0462957A3 publication Critical patent/EP0462957A3/xx
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • the present invention relates to a device for the accelerated cooling of a moving metal product.
  • a hot-formed metal product must undergo special cooling, often called accelerated or controlled cooling, to acquire certain specific properties. It is increasingly sought now to perform this cooling in line, immediately at the exit of the forming installation, and very particularly at the exit of the hot rolling mill.
  • the object of the present invention is to provide a device enabling homogeneous cooling of a metallic product in motion, whatever the shape of this product.
  • the device of the invention requires only minor adjustments to be usable with a wide range of shapes and dimensions; it has a high cooling power and is easily integrated into an existing installation.
  • a device for the accelerated cooling of a moving metal product comprises a substantially horizontal rectilinear channel in which the metal product to be cooled moves, said channel being equipped with means of transport. of said metal product, in that said channel is provided, near each of its ends, with means for forming at least one curtain of coolant directed towards the interior of said channel and inclined relative to the direction of movement of the product metallic and in that said channel comprises means for discharging the excess cooling agent.
  • Said coolant curtains can in principle have any shape, but they are preferably flat.
  • the device is provided, near at least one of the ends of said channel, with means for forming two curtains of coolant which intersect inside said channel, along a line substantially perpendicular to the direction of movement of the metal product to be cooled.
  • the two curtains of coolant are preferably arranged symmetrically with respect to a plane parallel to the direction of movement of the metal product and containing said line of intersection of said two curtains.
  • the means for forming said curtains of coolant can comprise a pipe, advantageously straight and preferably convergent, which is connected at one end to a source of coolant and which ends at the other end by a slot whose shape is appropriate to that of the desired curtain. If the curtain must be flat, according to the preferred embodiment, the slit will be straight.
  • Said means for forming the curtains of coolant are arranged so as to project said curtains at an angle between 15 ° and 45 °, and preferably between 25 ° and 40 °, relative to the direction of movement of the product to be cooled .
  • the device comprises a substantially horizontal plate fixed, optionally removable, on the upper edge of the side walls of said channel and forming a roof thereon.
  • this horizontal plate extends, in width, beyond the lateral walls of the channel and it is provided, along its lateral edges, with substantially vertical deflectors, directed downwards.
  • the purpose of the channel roof is to prevent coolant from spilling out of the channel and to contribute to the turbulence of the coolant in the channel.
  • the side deflectors divert the coolant discharged through the side weirs to appropriate recovery means.
  • Said discharge means may comprise at least one orifice, preferably a weir formed in at least one of the side walls of the channel, preferably substantially halfway between the two ends of said channel.
  • Figure 1 shows an end portion of a channel 1, the bottom of which has transverse chambers 2 where transport rollers are housed 3.
  • the channel 1 has a rectangular section, illustrated in the right view of the figure, which is a section along line AA. This sectional view also shows the profile of the roof 17 and side deflectors 18.
  • the end of the channel is provided with an opening 4 providing passage for the product to be cooled.
  • Near the end of the channel 1 are mounted two injection systems 5,6 to form curtains 7,8 of coolant, generally water, which are inclined relative to the longitudinal direction of the channel 1.
  • These pressurized water curtains directed towards the inside of the channel, form a hydraulic door which prevents the flow of water through the end opening of the channel.
  • FIG. 2 shows a complete channel 1, comprising at its two ends hydraulic doors made up of inclined curtains of water 7.8.
  • the channel is additionally provided with a weir 9, which ensures the circulation of the cooling agent while maintaining a constant level of this cooling agent in the channel 1. (height h).
  • the product to be cooled moves in the direction indicated by the arrow 10. It enters the channel 1 through the upstream opening 4, then it passes through the hydraulic door formed by the water curtains 7,8; it travels the length of the channel 1, moving on the transport rollers 3. Then it crosses the hydraulic door constituted by the water curtains 11,12 and it leaves the channel by the downstream opening 13.
  • the product circulates in the water bath of height h which is the seat of a high turbulence created by the water curtains under pressure; this water flows tangentially in the longitudinal direction, on the surface of the product, whatever the shape thereof, and ensures regular and homogeneous cooling of the product.
  • FIG. 3 A particular injection system is shown in FIG. 3. It essentially consists of a converging flat pipe 14, connected on the one hand to a box 15 for distributing the coolant. under pressure and opening on the other hand into the channel 1.
  • the pipe 14 has a rectangular section whose large dimension extends transversely with respect to the channel 1.
  • the outlet section of the pipe 14 forms a slot of width e.
  • the axial plane of the pipe 14 makes an angle O of about 30 ° with the horizontal bottom of the channel 1.
  • the box 15 is connected to a source of cooling agent, not shown. Between the box 15 and the inlet of the pipe 14, a grid 16 is provided comprising a transverse slot for ensuring the distribution of the cooling agent over the entire transverse length of the pipe 14.
  • the water flow per curtain can be 190 m3 / h, under a pressure of 3 bar.
  • the device of the invention can be used to continuously cool any type of product, in particular long products such as I, T, H, L, U sections, U or Z sheet piling, rails and even medium or heavy plates.

Landscapes

  • 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)
EP91870091A 1990-06-19 1991-06-11 Dispositif pour le refroidissement accéléré d'un produit métallique en mouvement Withdrawn EP0462957A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9000624A BE1004451A6 (fr) 1990-06-19 1990-06-19 Dispositif pour le refroidissment accelere d'un produit metallique en mouvement.
BE9000624 1990-06-19

Publications (2)

Publication Number Publication Date
EP0462957A2 true EP0462957A2 (fr) 1991-12-27
EP0462957A3 EP0462957A3 (enrdf_load_stackoverflow) 1994-02-23

Family

ID=3884836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91870091A Withdrawn EP0462957A2 (fr) 1990-06-19 1991-06-11 Dispositif pour le refroidissement accéléré d'un produit métallique en mouvement

Country Status (3)

Country Link
EP (1) EP0462957A2 (enrdf_load_stackoverflow)
JP (1) JPH04227448A (enrdf_load_stackoverflow)
BE (1) BE1004451A6 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103316934B (zh) * 2013-06-24 2016-01-06 中冶赛迪工程技术股份有限公司 一种多阻尼的可分离腔体的上喷层流冷却装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687145A (en) * 1970-06-26 1972-08-29 Inland Steel Co Quench system
US3897230A (en) * 1973-05-09 1975-07-29 Inland Steel Co Cooling system
NL156445B (nl) * 1973-06-04 1978-04-17 Hoogovens Ijmuiden Bv Inrichting voor het koelen van staaf- en draadmateriaal.

Also Published As

Publication number Publication date
EP0462957A3 (enrdf_load_stackoverflow) 1994-02-23
BE1004451A6 (fr) 1992-11-24
JPH04227448A (ja) 1992-08-17

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