EP0925855A2 - Vorrichtung zum kontrollierten Abkühlen von warmgewalzten Profilen, insbesondere Trägern, direkt aus der Walzhitze - Google Patents
Vorrichtung zum kontrollierten Abkühlen von warmgewalzten Profilen, insbesondere Trägern, direkt aus der Walzhitze Download PDFInfo
- Publication number
- EP0925855A2 EP0925855A2 EP98124114A EP98124114A EP0925855A2 EP 0925855 A2 EP0925855 A2 EP 0925855A2 EP 98124114 A EP98124114 A EP 98124114A EP 98124114 A EP98124114 A EP 98124114A EP 0925855 A2 EP0925855 A2 EP 0925855A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- nozzles
- profile
- profiles
- nozzle
- 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- Withdrawn
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 83
- 238000005096 rolling process Methods 0.000 title claims description 10
- 239000007921 spray Substances 0.000 claims abstract description 19
- 239000002826 coolant Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000443 aerosol Substances 0.000 claims 1
- 239000012809 cooling fluid Substances 0.000 claims 1
- 238000003491 array Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 229910000734 martensite Inorganic materials 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000000969 carrier Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
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
- 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
-
- 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
- C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
-
- 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
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
Definitions
- the invention relates to a device for controlled Cooling of hot-rolled profiles, especially beams Steel, straight from the rolling heat.
- thermomechanical rolling especially when rolling profiles, however Limits are set by the load capacity of the roll stands these processes have high levels of deformation in comparison require low temperatures.
- QST Quenching and Self Tempering, hardening and self-tempering
- the components For example, rolled profiles, after the finish stitch from the Roll heat quenched out with water. Before the core of the Workpiece has cooled, the cooling is interrupted and the structure in the edge area due to the core still present Heat left.
- this can Process will be influenced, in particular, about the Cooling time set the depth of the layer (penetration depth), in which martensite forms.
- the starting process takes place, in which the previously formed by the residual heat in the profile Martensite layer is left on.
- the temperature is rising again above the martensite start temperature.
- the martensitic area relaxes and thus a material high strength with good toughness.
- the subsequent cooling process in air forms inside the cross section bainitic and / or (fine) pearlitic Structure.
- the material is to be cooled without forming martensite, is the surface temperature via the cooling time and cooling intensity the profiles cooled so that the martensite start temperature is not undercut. Homogenization also takes place here the temperature distribution a tempering after End of forced cooling. After the start-up process results an improvement in the mechanical properties the setting of a fine pearlitic and ferritic structure.
- the profile or the surfaces to be cooled be targeted with the cooling medium.
- a device for cooling carriers is from the European Patent 0 140 026 known.
- the application of Coolant is passed through so-called cool boxes. These are sprayed with openings at equal intervals provided by coolant.
- For cooling the outer or inner areas of the carrier are the boxes for the outer surface at least as large as the height of the flanges. Cover the boxes to cool the inner flanges the entire inner surface of the flanges and at least 70% the web area. It is possible to change the curvature behavior too to influence with asymmetrical profiles.
- European patent 0 462 783 discloses a method and a device for heat treatment thin-walled Double T profiles.
- the rolled products are forced-cooled between the rolling processes.
- the cooling device itself consists of a large number of nozzles arranged one above the other are. They are operated with water and are different can be switched on and off.
- the cooling device described cools the flange outer sides of the Profiles. This is done with the purpose of the outer surface of the Beam to final temperature before final hot rolling cool from 700 ° C or less. By repetition The forced cooling with water becomes the microstructure of the Flange surface converted to a certain depth.
- the present invention has for its object a Cooling device for finished rolled profiles, in particular Steel girder to be provided when changing the rolling program to different geometries and sizes of the profiles adjustable and uniform cooling of the profile or the cooling of defined sections guaranteed.
- the core of the invention is the setting of an optimally adapted Spray pattern of the cooling device on different profile geometries, in that the cooling device has cooling areas, each with a cooling area from the one to be cooled Profile viewed from this is arranged above, and the cooling areas can be used individually or in combination are, with a cooling area each from at least one nozzle or a composite nozzle, the nozzles individually or are controllable in the network, d. H . the individual cooling areas are controllable.
- the adaptation of the cooling effect is achieved in detail by varying the nozzle distance to the profile, by controlled Setting the spray pressure by means of stepless Individual nozzles can be rotated and switched on and off of the individual nozzles.
- the nozzle assembly consists of several nozzles, their outlet openings span a plane or form a straight line. Due to the differently designed nozzle assemblies as surfaces or rows of nozzles and the high variability of the nozzles becomes one reached flexible adjustment of the cooling device, wherein the different sections of the profiles are cooled differently and the cooling capacity can be adapted to the requirements can.
- the proposed cooling device can be different shaped profiles, one after the other the device run through without cooling the system.
- cooling processes to minimize residual stress in the Workpiece body through simultaneous structural transformation in the material to pull as well as cooling processes to set a pearlitic Structure.
- the cooling device can optimally match the beam or profile dimensions be adjusted.
- Figure 1 shows a cross section of the overall arrangement of the cooling device with an upper 1, lower 2 and side 3 Cooling area.
- the rolling stock to be cooled is transferred via a roller table 4 from the rolling mill after the finish stitch through the cooling device guided.
- a roller table 4 from the rolling mill after the finish stitch through the cooling device guided.
- the spray angles are schematic in Figure 2 for a double T-beam shown.
- the amount of cooling medium applied depends on the profile to be cooled the profile size and shape by switching on or off of the nozzles across the cross-section and in the longitudinal direction adjusted without having to change the tool. This makes it possible to have an optimally adapted spray pattern to create and individual profiles of a profile row without losses cooling by spraying past the profile.
- the individual nozzles 7 are outside the profile range located pivot points and optionally stepless rotatable or fixed.
- the nozzle assemblies are for cooling the flange outer sides rotatable and / or slidably arranged.
- the nozzles for cooling from the Roller table out are fixed.
- the proposed cooling device is not only used for steel beams of different gradations and different Guys. Particularly suitable for profiles of more complicated shapes this cooling arrangement.
- Figure 3 shows the setting of the nozzles using the example of a pit expansion profile 6. By controlled Use only certain nozzles at certain angles every section of the profile can be cooled in a defined manner.
- one controlled cooling of the flange outer sides 8 achieved by an angular adjustment of the nozzles ( Figure 4) or by a horizontal linear guide ( Figure 5) of the nozzles.
- FIG 4 is the adjustment of the position of the respective nozzles 7 of the side cooling area 3 and their angle in With regard to two double-T beams of different types 5 a and 5 b and various sizes or a pit expansion profile 6 is shown schematically.
- the angle adjustment is achieved in that the cooling of the outer sides the flanges 8 through a plurality of nozzles 7 arranged one above the other takes place on an outside of the profile range Pivot point and are continuously rotatable.
- the arrangement can be adjusted so that it is at the bottom edge all possible profiles due to the large radius is adjusted so as not to spray past the flange.
- FIG. 5 shows schematically in cross section a lateral nozzle arrangement 3, which extends in the longitudinal direction continues.
- the nozzle arrangement is horizontal as a whole slidable.
- the spraying effect is above that to be set Distance, the number of nozzles 7 and a targeted switching on and off individual nozzles reached.
- Die Cooling capacity or the heat transfer coefficient is determined by the Variation of the nozzle pressure set. It is conceivable that the functions of angle adjustment and linear guidance be combined.
- Figures 6 a and b illustrate the cooling of the undersides of a Double-T beam through nozzles from the roller conveyor, i.e. of the lower nozzle assembly 2, it can be seen that the Nozzle arrangement on different profile levels as well as on carriers of different types with different large web areas and corresponding flange areas is customizable.
- the device cannot only be used for double-T beams or Pit expansion profiles can be used. It is also possible use for rails or angled profiles.
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 Treatments In General, Especially Conveying And Cooling (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
- Figur 1
- einen Querschnitt einer Gesamtanordnung der vorgeschlagenen Kühlvorrichtung;
- Figur 2
- eine schematische Darstellung der Sprühwinkel am Beispiel eines Doppel-T-Trägers;
- Figur 3
- eine schematische Darstellung der Sprühwinkel am Beispiel eines Grubenausbauprofils.
- Figur 4
- die Düsenanordnung zur Kühlung der Flanschaußenseite eines Doppel-T-Trägers durch Winkelverstellung der Düsen;
- Figur 5
- die Düsenanordnung zur Kühlung der Flanschaußenseite eines Doppel-T-Trägers durch Linearführung;
- Figuren 6 a, b
- den definierten Einsatz von Düsen bei unterschiedlichen Profilgrößen und -typen;
Claims (9)
- Vorrichtung zum kontrollierten Abkühlen von warmgewalzten Profilen, insbesondere Trägern, direkt aus der Walzhitze, bestehend aus einer Anordnung von Düsen mit Austrittsöffnungen zum Sprühen von Kühlmittel auf die Profile, wobei die Profile entlang der Düsenanordnung transportiert werden,
dadurch gekennzeichnet,
daß die Kühlvorrichtung Kühlbereiche aufweist, wobei jeweils ein Kühlbereich von dem zu kühlenden Profil (5,6) aus betrachtet zu diesem oberhalb (1) und zu beiden Seiten (3) und unterhalb (2) angeordnet ist, und die Kühlbereiche jeweils einzeln oder kombiniert einsetzbar sind, wobei ein Kühlbereich jeweils aus mindestens einer Düse (7) oder einem Düsenverbund besteht, wobei die Düsen einzeln oder im Verbund steuerbar sind. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Düsen (7) durch Variation des Düsenabstandes zum Profil hin, durch kontrollierte Einstellung des Spritzdrucks, durch stufenlose Verdrehbarkeit der einzelnen Düsen sowie durch Zu- und Abschalten der einzelnen Düsen steuerbar sind. - Vorrichtung nach Anpruch 1,
dadurch gekennzeichnet,
daß der Düsenverbund aus mehreren Düsen (7) besteht, deren Austrittsöffnungen eine Ebene aufspannen oder auf einer Geraden liegen. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Düsen (7) der Kühlbereiche (1,2,3) außerhalb des Bereichs angeordnet sind, den das größte zu bearbeitende Profil (5, 6) einer Profilstaffelung bzw. Profilgruppe einnimmt. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der untere Kühlungsbereich (2) unterhalb des Fördermittels der Profile, insbesondere eines Rollgangs (4), angeordnet ist. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der seitliche Kühlungsbereich (3) in horizontaler Richtung zum Profil verschiebbar ist. - Vorrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß die Düsen des seitlichen Kühlungsbereichs (3) einzeln oder zusammen an einem bewegbaren Bauteil gelagert sind. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß bei der Kühlung von als Doppel-T-Trägern ausgebildeten Stahlträgern (5), bestehend aus einem Steg und zwei Flanschen, die obere Sprühfächerkante des Sprühstrahls, der die Flanschinnenseiten (9) und den den Flanschinnenseiten nächstliegenden Stegbereich (10) beaufschlagen, parallel zu einer gedachten Verbindungslinie (13) des Übergangsbereichs Flanschinnenseite/Steg aller Profile einer Staffelung verläuft. - Vorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß es sich bei dem Kühlmedium um Wasser, Aerosole oder andere Kühlfluide handelt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19757485A DE19757485A1 (de) | 1997-12-23 | 1997-12-23 | Vorrichtung zum kontrollierten Abkühlen von warmgewalzten Profilen, insbesondere Trägern, direkt aus der Walzhitze |
DE19757485 | 1997-12-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0925855A2 true EP0925855A2 (de) | 1999-06-30 |
EP0925855A3 EP0925855A3 (de) | 2000-08-02 |
Family
ID=7853147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98124114A Withdrawn EP0925855A3 (de) | 1997-12-23 | 1998-12-18 | Vorrichtung zum kontrollierten Abkühlen von warmgewalzten Profilen, insbesondere Trägern, direkt aus der Walzhitze |
Country Status (4)
Country | Link |
---|---|
US (1) | US6170284B1 (de) |
EP (1) | EP0925855A3 (de) |
JP (1) | JPH11254022A (de) |
DE (1) | DE19757485A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10352622A1 (de) * | 2003-11-12 | 2005-06-16 | Bayerische Motoren Werke Ag | Verfahren und Vorrichtung zum Abschrecken von Werkstücken |
JP5309684B2 (ja) * | 2008-05-13 | 2013-10-09 | 株式会社Ihi | ワークの冷却方法及びワークの冷却装置 |
KR101129845B1 (ko) | 2009-10-29 | 2012-03-23 | 현대제철 주식회사 | 트랙 슈용 냉각장치 |
CN101804422B (zh) * | 2010-02-10 | 2011-10-26 | 东北大学 | 一种大型h型钢轧后超快速冷却装置 |
JP6515370B2 (ja) * | 2014-05-29 | 2019-05-22 | 株式会社Ihi | 冷却装置及び多室型熱処理装置 |
CN108699651A (zh) † | 2016-03-02 | 2018-10-23 | 新日铁住金株式会社 | 低温用h形钢及其制造方法 |
WO2019122986A1 (en) * | 2017-12-22 | 2019-06-27 | Arcelormittal | Steel section rolling mill |
CN113375531B (zh) * | 2021-05-14 | 2023-11-03 | 南京钢铁股份有限公司 | 一种淬火机喷嘴打击角度测量工具及其制造方法、使用方法 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2148722A1 (de) * | 1970-10-02 | 1972-05-10 | Wendel Sidelor | Verfahren zur Waermebehandlung von Schienen mit einer hohen Widerstandsfaehigkeit gegen Abnutzung und dadurch hergestellte Schienen |
JPS62188726A (ja) * | 1986-02-13 | 1987-08-18 | Nippon Kokan Kk <Nkk> | 不等辺不等厚山形鋼の冷却装置及び冷却方法 |
DE8810085U1 (de) * | 1988-08-08 | 1988-10-20 | Elhaus, Friedrich Wilhelm, Dipl.-Ing., 7703 Rielasingen-Worblingen | Sprühwasser-Abschreckvorrichtung für Strangpreßprofile |
EP0462783A2 (de) * | 1990-06-21 | 1991-12-27 | Nippon Steel Corporation | Verfahren und Vorrichtung zum Herstellen stählerner Doppel-T-Träger mit dünnem Steg |
WO1992019395A1 (fr) * | 1991-04-29 | 1992-11-12 | Bertin & Cie | Procede et dispositif de refroidissement d'un profile en cours de laminage |
EP0578607A1 (de) * | 1992-06-19 | 1994-01-12 | Alusuisse-Lonza Services Ag | Sprayanlage zum Kühlen von Profilen |
JPH0657327A (ja) * | 1992-08-10 | 1994-03-01 | Kawasaki Steel Corp | 靱性・強度に富んだh形鋼の製造方法 |
JPH07108316A (ja) * | 1993-10-12 | 1995-04-25 | Nippon Steel Corp | H形鋼の冷却方法および装置 |
EP0794022A2 (de) * | 1996-03-08 | 1997-09-10 | Sms Schloemann-Siemag Aktiengesellschaft | Verfahren und Vorrichtung sowie Kühlmedium zum Kühlen von walzwarmen Profilen |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3997376A (en) * | 1974-06-19 | 1976-12-14 | Midland-Ross Corporation | Spray mist cooling method |
SE437675B (sv) * | 1981-05-14 | 1985-03-11 | Asea Ab | Kylanordning for avlanga kroppar |
CA1193176A (en) | 1982-07-06 | 1985-09-10 | Robert J. Ackert | Method for the production of improved railway rails by accelerated colling in line with the production rolling mill |
LU84999A1 (fr) | 1983-09-12 | 1985-06-04 | Arbed | Procede et dispositif de refroidissement de produits metalliques lamines |
US4497180A (en) * | 1984-03-29 | 1985-02-05 | National Steel Corporation | Method and apparatus useful in cooling hot strip |
DE4237991A1 (de) * | 1992-11-11 | 1994-05-19 | Schloemann Siemag Ag | Verfahren und Vorrichtung zur Abkühlung von warmgewalzten Profilen insbesondere von Schienen |
-
1997
- 1997-12-23 DE DE19757485A patent/DE19757485A1/de not_active Withdrawn
-
1998
- 1998-12-17 US US09/213,608 patent/US6170284B1/en not_active Expired - Lifetime
- 1998-12-18 EP EP98124114A patent/EP0925855A3/de not_active Withdrawn
- 1998-12-21 JP JP10363344A patent/JPH11254022A/ja active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2148722A1 (de) * | 1970-10-02 | 1972-05-10 | Wendel Sidelor | Verfahren zur Waermebehandlung von Schienen mit einer hohen Widerstandsfaehigkeit gegen Abnutzung und dadurch hergestellte Schienen |
JPS62188726A (ja) * | 1986-02-13 | 1987-08-18 | Nippon Kokan Kk <Nkk> | 不等辺不等厚山形鋼の冷却装置及び冷却方法 |
DE8810085U1 (de) * | 1988-08-08 | 1988-10-20 | Elhaus, Friedrich Wilhelm, Dipl.-Ing., 7703 Rielasingen-Worblingen | Sprühwasser-Abschreckvorrichtung für Strangpreßprofile |
EP0462783A2 (de) * | 1990-06-21 | 1991-12-27 | Nippon Steel Corporation | Verfahren und Vorrichtung zum Herstellen stählerner Doppel-T-Träger mit dünnem Steg |
WO1992019395A1 (fr) * | 1991-04-29 | 1992-11-12 | Bertin & Cie | Procede et dispositif de refroidissement d'un profile en cours de laminage |
EP0578607A1 (de) * | 1992-06-19 | 1994-01-12 | Alusuisse-Lonza Services Ag | Sprayanlage zum Kühlen von Profilen |
JPH0657327A (ja) * | 1992-08-10 | 1994-03-01 | Kawasaki Steel Corp | 靱性・強度に富んだh形鋼の製造方法 |
JPH07108316A (ja) * | 1993-10-12 | 1995-04-25 | Nippon Steel Corp | H形鋼の冷却方法および装置 |
EP0794022A2 (de) * | 1996-03-08 | 1997-09-10 | Sms Schloemann-Siemag Aktiengesellschaft | Verfahren und Vorrichtung sowie Kühlmedium zum Kühlen von walzwarmen Profilen |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 012, no. 040 (C-474), 5. Februar 1988 (1988-02-05) -& JP 62 188726 A (NIPPON KOKAN KK), 18. August 1987 (1987-08-18) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 291 (C-1208), 3. Juni 1994 (1994-06-03) -& JP 06 057327 A (KAWASAKI STEEL CORP), 1. März 1994 (1994-03-01) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 07, 31. August 1995 (1995-08-31) -& JP 07 108316 A (NIPPON STEEL CORP), 25. April 1995 (1995-04-25) * |
Also Published As
Publication number | Publication date |
---|---|
US6170284B1 (en) | 2001-01-09 |
JPH11254022A (ja) | 1999-09-21 |
DE19757485A1 (de) | 1999-06-24 |
EP0925855A3 (de) | 2000-08-02 |
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