US3753793A - Method for cooling metal webs - Google Patents

Method for cooling metal webs Download PDF

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Publication number
US3753793A
US3753793A US00192885A US3753793DA US3753793A US 3753793 A US3753793 A US 3753793A US 00192885 A US00192885 A US 00192885A US 3753793D A US3753793D A US 3753793DA US 3753793 A US3753793 A US 3753793A
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United States
Prior art keywords
web
jet
cooling
fans
coolant
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 - Lifetime
Application number
US00192885A
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English (en)
Inventor
E Wagener
F Jansch
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Mannesmann Demag AG
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Demag AG
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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
    • 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
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/20—Perforated pipes or troughs, e.g. spray booms; Outlet elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0423—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material for supplying liquid or other fluent material to several spraying apparatus

Definitions

  • ABSTRACT The disclosure relates to a method and to an apparatus for cooling continuously cast webs of metal. Several coolant jets are produced continuously and at least two jets are projected to a hotter, slowly cooling zone of the surface of the webs.
  • water is sprayed from atomizer nozzle in selective zones upon the surface of the continuous casting.
  • the coolant impact areas are approximately elliptical in cross-sectional shape.
  • the cross-sectional shape of the continuous casting which is rectangular in most cases, requires a particular cooling behavior.
  • An effective, zonewise amplified cooling of a cast metal web heretofore has presented an unsolved problem.
  • the present invention is directed to a solution of the problem i.e., to improving the cooling effect according to the cooling behavior of a continuous castings of predetermined crosssections in order that the casting process may be accomplished faster thereby increasing the yield of extruded metal in a given period.
  • a new method is proposed wherein coolant is delivered at one or several discharge apertures in a jet or jets which cover the entire surface of the web, which travels in an approximately uniformly thick layer.
  • at least two jets of different planes are intersected prior to their impact of which at least one plane deviates from a per pendicular plane through the web surface zone being cooled.
  • the intersecting of the jets causes a substantial increase of the width of the flat coolant jet pattern even at higher pressures.
  • the kinetic energy can be utilized better than heretofore for the building up of the spray characteristic, that is for the distribution of the pressure over the width of the casting surface moving below the cooling jet.
  • One particular effect is obtained by intersecting two jet planes (or fans) by converting the kinetic energy into pressure energy thus leading to a broadening of the relativelynarrow fan thickness of the cooling jets.
  • the intensity of the cooling can be regulated advantageously by jets of different jet fans, whereby they are directed against the surface of the csating from different distances.
  • angles of the jet planes may be modified in relation to each other and/or to the surface of the web or casting, commensurate with the corresponding cooling intensity.
  • the corresponding angle setting is a measure for increasing or decreasing the width of the cooling stripe on the web surface.
  • a particularly advantageous apparatus for practicing the method of the invention includes a multiple nozzle arrangement with the central axis of each issued jet fan disposed in separate planes.
  • Each nozzle is connected to a supply conduit for coolants and may be fixed at a setting which is angularly adjustable in relation to the other nozzles and the issuing jet sprays. It is advantageous to provide a single nozzle with several discharge apertreus for each jet fan.
  • Each nozzle is pivoted by itself for the desired angular adjustment and it is pivoted to arrange the abovedescribed intersection.
  • the jet stream characteristics located ahead of the point of intersection thereby do not change at a renewed angle adjustment, providing pressures and discharge apertures remain unmodified.
  • the apparatus now may be constructed with all the nozzles of all the jet sprays accommodated in a unitary housing.
  • the nozzles thus are adjustable in rows.
  • the nozzles for each cooling stripe are adjustable in the housing in distance and angularity, in relation to the casting surface. Therefore, the entire housing may be adjustable in distance and angularly.
  • FIG. 1 is a perspective view of a moving casting web supported by rollers and being cooled with three intersecting jet fans;
  • FIG. 2 illustrates a single jet fan
  • FIG. 3 shows the impact pattern of the jet fan of FIG.
  • FIG. 4 is a schematic diagram of the distribution of the quantities of water across the width of the web
  • FIG. 5 illustrates two intersecting jet fans
  • FIG. 6 illustrates the projection planes of separate jet fans depicted without the effects of their intersection
  • FIG. 7 illustrates another embodiment with three intersecting jets
  • FIG. 8 shows the impact pattern on the cast web produced according to the apparatus of FIG. 7;
  • FIG. 9 shows a variation of the nozzle positions of the embodiment according to FIG. 7, and
  • FIG. 10 is a schematic diagram of the distribution of the amounts of water produced according to the apparatus'of FIG. 1 and to FIG. 9.
  • the cross-section 2 of the continuous casting 1 is generally rectangular.
  • the steel is still molten, pasty, and of a higher temperature than the marginal ranges in the central cross-section area 3.
  • the marginal ranges have chilled into a shell 4 which is increasingly hardened on the basis of the outer cooling, which is effected by the amount and spacing of molten core material from the continuous hardening shell.
  • the cooling also is a function of the basic structure of an extrusion system.
  • the parameters including shape of cross-section, dimensions, material-dependent heat conductivity, and casting speed are of essential importance.
  • external influences such as sharp bending of the web, or the pressing effect of the elements for guiding the casting must be taken into consideration. With the latter, overstress may occur on a metal web not sufficiently cooled, causing fissures on the inside or outside of the web.
  • Spraying cooling water at the outer surface of the continuous shell 4 is used for a rapid increase of the thickness of the same. Regions at larger distances from the continuous shell, i.e., the central core, of the casting ought to be so chilled at a rate that the materialdependent cooling curve is unifonn at all points of the cross-section of the web 2. In all areas of the length of the casting or web the method according to the invention may be adjusted with particular facility to local conditions. Thereby, in accordance with the invention, a cooling intensity is provided over the width 5 of the casting web 1, which intensity is proportional to the quantities of heat to be removed per unit of time and per volume of the web.
  • a cooling zone 8 is defined between two guiding rolls 6 and 7. In the direction of movement of the web the coolingzone 8 is limited by the guide rolls which either pump or aspirate the cooling water ahead ofthem.
  • Pipes l0 constantly supplying coolant, for example cooling water of controlled temperature and purity, extend above the web surface 9 and/or the rolls 6 and 7.
  • the pipes 10 may be fastened in an expedient manner (e.g., by clamps) to parts of the extrusion system (not shown). The fastening may be such that the spacing of the pipes 10 in relation to the surface of the casting web 9 is variable. For small amounts of coolant a single pipe 10 will suffice, as shown in the drawing. Nozzle bodies ll, 12 and 13 are fastened to the pipe 10.
  • a plurality of discharge openings of round or oblong shape are formed in said bodies and, as shown, nozzle body ll, l2, 13, generates a spray fan 14,15,16.
  • the lateral edges 17 of each of the fans are generally parallel or slightly divergent.
  • Approximately equally thick jet sprays or fans l4, l5, 16 are established by the nozzle openings to stabilize the flow of coolant in each of the nozzle bodies ll, 12, 13 and to stabilize correspondingly the pressures of the coolant and/or corresponding flow rates in each nozzle.
  • the jet spray fans impact with their central planes 18 transverse to the direction of movement of the web surface 9.
  • several jet fans also may be placed parallel to the direction of movement of the web. The distribution of the amount of water within the length of the jet spray (in longitudinal direction of the web) is then maintained almost constant.
  • the fan jets 14, and 16 meet and intersect at intersection 19. Before the intersection 19, the jet fans 14, 15, 16 are completely separated, but beyond the intersection, they emanate as a joint, unitary spray. Thus, the web may be covered uniformly with coolant over a considerably wide surface.
  • a single fan jet 15, as shown in FIG. 2 produces only a narrow impact surface pattern 20, although it is possible thereby, according to FIG. 3, to achieve a stripe-shaped impact surface pattern extending over the entire width 5 of the web.
  • the individual fan jet 15 establishes over the width 5 a weighted coolant distribution, as shown in FIG. 4.
  • the quantity of water is greatest in the center 21 of the web, commensurate with the large quantity of heat to be removed therefrom and pursuant to the invention.
  • the distribution or pattern of the coolant on the surface of the web 9 is determined by the distribution of forces in the individual jets. If jet spray fan 14 is preponderant, the coolant is urged in the direction of the roller 7. With the jet spray fan 16 acting with greater force, the gap area 22 proximate the roller 6 will be favored.
  • the illustration of spray impingement in FIG. 6 represents a momentarily prevailing condition of coolant distribution which, of course, is variable periodically by pressure fluctuations. It is particularly advantageous to employ alternating pressure variations in the jet sprays l4 and 16, when only two jets are used to create a large cooling zone 8, to work on a large portion of web surface 9.
  • the intersecting of several fans 14 and 16 also is advantageous to accommodate variations in spacing and diameters of pairs of supporting rollers 6 and 7 over the length of the course of the casting. More narrow support roller gaps may be filled more easily with coolant. Desirably, the coolant produces as large a cooling zone as possible, which zone may be composed in part of the casting surface 9 between rollers and the facing circumferential surfaces of the rollers themselves.
  • FIG. 7 A considerably increased distribution of cooling effact for the coolant, in comparison with the two jet method, is shown in FIG. 7, which in assition is shown in perspective in FIG. 1.
  • Three fans 14, 15 and 16 are directed at the intersection 19.
  • a particularly favorable spacing is selected between intersection l9 and casting surface 9, which corresponds to approximately half the diameter of the supporting roller.
  • the resultant coolant spray 23 impacting upon the casting surface 9 establishes a cooling zone 8 of the width 20 which is markedly enlarged in FIG. 8.
  • the coolant of jet 23 possesses a high specific density.
  • the resultant coolant jet spray 23 may consist not only of the three spray fans 14, 15 and 16, but may also be generated from a plurality of fans contacting at the intersection l9, mixing with each other and/or deflecting therefrom.
  • three independent jet fans 14, 15 and 16 are generated, the characteristics and the influences of the individual layer jets on the resultant jet 23 may be varied, as shown in FIG. 9.
  • variations may be developed by the spacings of the nozzle bodies 11 and 13 at different distances from the casting than the spacing of the symmetrically disposed nozzle body 12.
  • the spraying width 20 of the jet fan 15 is greater according to FIG. 10 (diagram for the distribution of the water quantity) in the center area of the casting width 5 and it, therefore, produces a hump 24 in the diagram.
  • a parabolic distribution of the amount of water 25 across casting width 5 is presupposed as a matter of principle, in order to take into account the lower cooling requirements at the marginal edges of the casting web 1.
  • the nozzle bodies l1, l2 and 13 are disposed in special housings 26 (FIG. 1), which may be universally, angularly oriented with respect to the web and pipes 27. Transport of the coolant from the main pipes 10 is effected through the pipes 27, as shown.
  • the nozzle bodies 11, 12 and 13 also may be individually angularly adjustable with the housings 26, themselves.
  • the pivotability and adjustability of the individual nozzle bodies l1, l2, 13 and/or of the housings 26 is provided for the adjustment of the spray planes in relation to the casting surface and to one another for controlling the distribution of water across the web.
  • a method for chilling heated, travelling metal webs comprising a. continuously generating at least two coolant fan jet streams;
  • said coolant streams being developed in plural discharge apertures and extending across the full width of said web;
  • said coolant flowing in approximately uniformly thick spray fan cross section and having a greater volume of coolant at its central portions than its edge portions;
  • a method according to claim 1 further characterized in that a. three fan jet streams are merged approximately at a point of intersection adjacent to the web surface.
  • a method according to claim 2 further characterized in that a. the fan jet sprays extend transversely of the direction of movement of the web. 4. A method according to claim 3, further characterized in that a. the jet fans produce cross-sectional projection patterns ranging from generally stripe-shaped to oblong oval shaped. 5. A method according to claim 4, further characterized in that a. sprays of different fans are directed upon the surface of the web from different elevations thereabove. 6. A method according to claim 5, further characterized in that 7 8 a. the angles of the jet fans are adjusted in predeter- 7. A method according to claim 6, further charactermined relation to each other and/or to the surface ized in that of the web to distribute coolant in suitably a. the quantitative output of the jets in individual fans weighted quantities commensurate with the correis readily adjustable to compensate for variations of sponding required cooling intensity increments 5 cooling requirements. across the web.

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  • 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)
  • Continuous Casting (AREA)
  • Spray Control Apparatus (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
US00192885A 1970-11-03 1971-10-27 Method for cooling metal webs Expired - Lifetime US3753793A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2053947A DE2053947C3 (de) 1970-11-03 1970-11-03 Verfahren und Vorrichtung zur Erzeugung von Kühlmittelstrahlen für die Abkühlung von Metallgießsträngen

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US3753793A true US3753793A (en) 1973-08-21

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US00192885A Expired - Lifetime US3753793A (en) 1970-11-03 1971-10-27 Method for cooling metal webs

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US (1) US3753793A (enrdf_load_stackoverflow)
JP (1) JPS5129500B1 (enrdf_load_stackoverflow)
AT (1) AT311578B (enrdf_load_stackoverflow)
CH (1) CH544599A (enrdf_load_stackoverflow)
DE (1) DE2053947C3 (enrdf_load_stackoverflow)
FR (1) FR2112425B1 (enrdf_load_stackoverflow)
GB (1) GB1364931A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877510A (en) * 1973-01-16 1975-04-15 Concast Inc Apparatus for cooling a continuously cast strand incorporating coolant spray nozzles providing controlled spray pattern
US3935896A (en) * 1973-01-16 1976-02-03 Concast Incorporated Method for cooling a continuously cast strand
US3981347A (en) * 1974-04-26 1976-09-21 Concast Ag Method and apparatus for strand cooling with a flat spray pattern
US3989093A (en) * 1974-03-18 1976-11-02 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Continuous casting plant for slabs
US4036281A (en) * 1975-10-03 1977-07-19 Irving Rossi Method for continuously casting a slab
US5112412A (en) * 1989-11-23 1992-05-12 Alusuisse-Lonza Services Ltd. Cooling of cast billets
US20050001073A1 (en) * 2002-08-12 2005-01-06 Isamu Nakayama Lubricant mist sprayer for pinch roll
US20140053958A1 (en) * 2012-08-21 2014-02-27 United Technologies Corporation Gamma Titanium Dual Property Heat Treat System and Method

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT323921B (de) * 1973-07-27 1975-08-11 Voest Ag Kuhleinrichtung für kontinuierlich zu giessende stränge
JPS50102525A (enrdf_load_stackoverflow) * 1974-01-17 1975-08-13
JPS5248507A (en) * 1975-10-16 1977-04-18 Nippon Kokan Kk <Nkk> Method for cooling outer surface of metallic pipe or large diameter
JPS52103328A (en) * 1976-02-27 1977-08-30 Nippon Kokan Kk Cooling device for high temperature material
JPS5331017U (enrdf_load_stackoverflow) * 1976-08-23 1978-03-17
JPS53113600U (enrdf_load_stackoverflow) * 1977-02-17 1978-09-09
JPS59159260A (ja) * 1983-02-28 1984-09-08 Kobe Steel Ltd 連続鋳造設備におけるミスト冷却方法及び冷却用ミスト噴出装置
AT1769U1 (de) * 1996-11-19 1997-11-25 Voest Alpine Ind Anlagen Einrichtung und verfahren zum kühlen eines breiten heissen stranges
AT504706B1 (de) * 2006-12-22 2012-01-15 Knorr Technik Gmbh Verfahren und vorrichtung zur wärmebehandlung von metallischen langprodukten
CN112091191B (zh) * 2020-11-11 2021-02-09 西安斯瑞先进铜合金科技有限公司 一种非真空下引半连铸铜锰合金扁锭的制备方法及其装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698700A (en) * 1970-12-08 1972-10-17 Precision Extrusions Inc Quenching apparatus for extruded articles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698700A (en) * 1970-12-08 1972-10-17 Precision Extrusions Inc Quenching apparatus for extruded articles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877510A (en) * 1973-01-16 1975-04-15 Concast Inc Apparatus for cooling a continuously cast strand incorporating coolant spray nozzles providing controlled spray pattern
US3935896A (en) * 1973-01-16 1976-02-03 Concast Incorporated Method for cooling a continuously cast strand
US3989093A (en) * 1974-03-18 1976-11-02 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Continuous casting plant for slabs
US3981347A (en) * 1974-04-26 1976-09-21 Concast Ag Method and apparatus for strand cooling with a flat spray pattern
US4036281A (en) * 1975-10-03 1977-07-19 Irving Rossi Method for continuously casting a slab
US5112412A (en) * 1989-11-23 1992-05-12 Alusuisse-Lonza Services Ltd. Cooling of cast billets
US20050001073A1 (en) * 2002-08-12 2005-01-06 Isamu Nakayama Lubricant mist sprayer for pinch roll
US7172141B2 (en) 2002-08-12 2007-02-06 Ishikawajima-Harima Heavy Industries Co., Ltd. Lubricant mist sprayer for pinch roll
US20140053958A1 (en) * 2012-08-21 2014-02-27 United Technologies Corporation Gamma Titanium Dual Property Heat Treat System and Method
US10006113B2 (en) * 2012-08-21 2018-06-26 United Technologies Corporation Gamma titanium dual property heat treat system and method

Also Published As

Publication number Publication date
JPS479605A (enrdf_load_stackoverflow) 1972-05-17
DE2053947B2 (de) 1974-05-30
FR2112425A1 (enrdf_load_stackoverflow) 1972-06-16
GB1364931A (en) 1974-08-29
AT311578B (de) 1973-11-26
JPS5129500B1 (enrdf_load_stackoverflow) 1976-08-26
DE2053947A1 (de) 1972-05-18
DE2053947C3 (de) 1975-01-16
CH544599A (de) 1973-11-30
FR2112425B1 (enrdf_load_stackoverflow) 1975-08-29

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