EP0725152B1 - Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen - Google Patents
Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen Download PDFInfo
- Publication number
- EP0725152B1 EP0725152B1 EP96100807A EP96100807A EP0725152B1 EP 0725152 B1 EP0725152 B1 EP 0725152B1 EP 96100807 A EP96100807 A EP 96100807A EP 96100807 A EP96100807 A EP 96100807A EP 0725152 B1 EP0725152 B1 EP 0725152B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- profile member
- heat
- temperature
- different
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000009466 transformation Effects 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000002826 coolant Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000003570 air Substances 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000004590 computer program Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 2
- 230000015556 catabolic process Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 16
- 229910001562 pearlite Inorganic materials 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 230000005855 radiation Effects 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- -1 with steam Substances 0.000 description 1
Images
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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- 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
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
-
- 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
- C21D2221/00—Treating localised areas of an article
- C21D2221/02—Edge parts
Definitions
- the invention relates to a method for cooling from the Rolling heat from hot-rolled profiles at a distance above the Cross section arranged profile parts of different Mass, especially of rails on a cooling bed, as well as a Device for performing the method.
- Rails are cooled from the rolling heat to temperatures below 80 o C on cooling beds. Because of the asymmetrical arrangement of the masses of the profile, there is a different cooling behavior between the head and foot of the rail, in which the foot cools down faster than the head due to its larger heat-dissipating surfaces compared to the mass. As a result, the rail bends when it cools down. This curvature can be counteracted to a certain extent by pre-bending the still hot rail. However, this disadvantageously requires a complex hot bending process with an uncertain result. In any case, the rails must be readjusted after cooling. Both the cooling process and especially the straightening create residual stresses in the rail, which adversely affect its strength. Numerous proposals have already been made to deal effectively with this difficulty:
- DE 42 37 991 A1 describes a method for cooling profiled rolling stock hot-rolled in roll stands, in particular rails on a cooling bed, with natural convection or with forced air cooling.
- the invention is that the rails are hung upside down, transported over the cooling bed.
- the heat transfer conditions are changed so favorably even with natural convection that the temperature difference between the head and foot of the rail decreases from approx. 140 ° C. with the rail lying down to approx. 50 ° C. with the rail hanging.
- the disadvantages of becoming crooked are effectively reduced and it is achieved that an almost straight rail is inserted into the straightening machine for finishing, whereby the end stresses in the rail material are kept extremely low.
- U.S. Patent 468,788 discloses a method of cooling Rails disclosed, these in a device with rail heads hanging below in a filled with water Pool completely or partially immersed and thereby cooled be, at the same time using pressure screws against a firm abutment can be pressed.
- DE-PS 404 127 describes a method for straightening Metal bars of asymmetrical cross-section, in particular of Rail tracks, disclosed, the invention therein there is that the strong parts of the cross section of such a regulated artificial cooling that all Parts shrink by the same amount despite their unequal strengths and the rods when they cool down to ambient temperature stay straight.
- This result is achieved by the fact that the artificial cooling either by immersion in a Liquid, by wetting or sprinkling, by blowing with an atomized liquid, with steam, air or other Gases is generated, the medium used is continuous or with interruptions for the whole duration or only during part of the cooling period works. Is remarkable at the process that regulates the artificial cooling in such a way can be that the rods, even if they are made of high carbon steel or a hardenable alloy during cooling not be hardened.
- the invention lies Task based on a method and an apparatus for Cooling of hot rolled profiles in the preamble of Claim 1 to improve the type mentioned and so far perfected that the above difficulties be overcome and a distortion-free cooling result when cooling from the rolling heat without cost and time-consuming trials and without incurring any resulting Scrap is reached.
- the solution to the method according to the invention is achieved by first determining the amounts of heat to be extracted from the different profile parts in accordance with their mass and temperature and the amount of cooling media required for this purpose, using measuring technology, in cooperation with a computing unit with the aid of a computing program and calculated and then the cooling of the different profile parts or their masses is carried out in such a controlled manner that they reach the conversion line A r3 / A r1 with the least possible time delay when the gamma mixed crystal decays into ferrite and / or pearlite with release of the conversion heat.
- An embodiment of the method provides that the further Cooling down from the transition temperature to one predetermined final temperature is still carried out so that the different centers of mass of the profile reach the final temperature as little as possible. This measure ensures a flawless Cooling result without bending the rail beyond one optimal state of remuneration with uniform hardness over the Profile cross section.
- Another expedient embodiment of the invention provides before that when the rolling stock profile or parts cool down of which using water as a coolant to the different profile surfaces Heat transfer numbers determined and with these the for Cooling of the profile surfaces required quantities of tasks Coolants are predetermined. This eliminates time-consuming Trials as well as lost trial material.
- the profiles are designed as rails and the rails with down hanging heads over a cooling bed and doing one controlled cooling of the different mass centers at least in part through natural convection and additionally due to the mass and temperature Profile parts to be extracted proportionately by heat additional use of cooling medium is made.
- a curvature of the profile is reduced so far that a Messages can either be omitted entirely, or below Avoiding harmful tensions only a minor News becomes necessary.
- the measure can still compensate for the temperature wedge be taken that the rolled stock profile, on the rolled out Seen length, is cooled at different intensities. And finally, controlled heat extraction by immersion of the entire rolled stock profile or individual parts of the same a cooling medium repeated one or more times with given cycle times.
- a device for performing the method according to the Invention provides that in addition to a hot-rolled profile preferably in Distances along their rolling length means for measuring the Heat radiation from different profile parts, such as head,
- the web or foot section are arranged with data lines are connected to a computing unit in which with a Input data line the dimensions or masses of these Profile parts are entered, and which is programmed that it calculates the product of temperature and mass and according to this product coolant feeder controls via a signal line.
- a preferred embodiment of the device provides that a cooling bed controllable coolant supply devices for different cooling media, e.g. B. water, air, Has water / air mixtures.
- a cooling bed controllable coolant supply devices for different cooling media e.g. B. water, air, Has water / air mixtures.
- FIG. 1 shows curves of different cooling profiles of different cross-sectional parts in the ZTU diagram, which reach the conversion line A r1 at comparatively different times depending on their mass and thus their temperature focus .
- the temporal differences occurring here result in differences between 40 and 120 seconds.
- This steel was austenitized at 950 ° C with a holding time of 15 minutes after a five-minute heating process.
- the foot (12, Fig. 5) When the rail cools down after rolling, the foot (12, Fig. 5) first reaches the conversion line A r3 / A r1 due to its lower mass and its larger radiation area in relation to the mass and begins to grow. This change in length leads to a plastic elongation in the rail head (10, FIG. 5), which is still in the austenite area. After the conversion, the foot (12) shrinks as the temperature drops, the head (10) not being significantly hampered due to its lower strength, but being slightly compressed. Then when the rail head (10) reaches the conversion line A r3 / A r1 , the length growth for this begins as a result of the conversion.
- FIG. 2 shows the cross section of a rail in approximately natural size, the rail section being equipped with thermocouples at the points labeled 1 to 5.
- the rail section is austenitized in an oven at 1000 o C and then cooled in air with natural convection. The cooling process at the individual measuring points 1 -5 was recorded in a diagram.
- FIG. 3 The cooling curves associated with the measuring points 1-5 according to FIG. 2 are drawn in with individual curves. From the diagram when cooling by means of natural convection without additional cooling z. B. the head (10) that the center of gravity (4) of the foot (12) has reached the A r3 / A r1 line after about 6.5 minutes and the conversion has ended after 10 minutes. The center of gravity (1) of the head (10) only starts the conversion after approx. 8.5 minutes and has ended after 12 minutes. At this point, the rail foot (12) is already about 100 o C colder and therefore has a much higher hot stretch than the rail head (10).
- the increase in length of the rail head (10) associated with the conversion is completely or partially suppressed by the foot (12) and the rail head (10) is thereby plastically deformed, ie compressed.
- the rail cooled down, this was visible through a clear curvature over the rail head (10).
- the amount of heat that has to be extracted from the rail head (10) has now been calculated to ensure that it reaches the conversion line A r3 / A r1 at the same time as the rail base (12).
- the heat of transformation of the corresponding steel (0.8% C) was also taken into account according to the invention. Based on the calculation, in addition to natural convection, the rail head (10) was cooled by additional spraying with water.
- FIG 5 is a possible embodiment of the invention shown purely schematically.
- the rail is overhead (10) hanging with the foot (12) in a holder (21) arranged.
- Measuring heads (30, 31, 32) are arranged so that the Measuring head (30) the thermal radiation of the rail foot (12), the Measuring head (31) the heat radiation of the web (11) and Measuring head (32) detects the heat radiation from the rail head (10) and the measured values via the data lines (33, 34, 35) reports to the computing unit (40).
- the input data line (36) the dimensions or masses of the assigned profile parts (10, 11, 12) entered, from which the appropriately programmed computing unit the product Temperature and mass for the individual profile parts (10, 11, 12) calculated and according to this product the Coolant supply devices (45 - 47) over the Controls signal line (37). These are activated and spray Coolant in targeted jets (48) against the hanging Rail head (10).
- the dash-dotted line (50) exemplified a cooling bed, which is controllable Coolant feed device (45 - 47) for different Has cooling media (48).
- These cooling media can contain water, Air, water / air mixtures.
- the cooling process of the rail is so evened out by targeted measures that the main masses, head (10), web (11) and foot (12) reach the conversion line A r3 / A r1 at about the same time and the length change that then occurs different profile parts also take place simultaneously.
- temperature differences across the cross-section can again occur, but the stresses generated thereby are clearly below the respective yield strength, so that the resulting deformations take place in the elastic range, with the result that a rail treated in this way after cooling is almost free of tension and approximately as straight as it was in the hot-rolled state before the treatment according to the invention.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Metal Rolling (AREA)
- Control Of Heat Treatment Processes (AREA)
- Control Of Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
- Fig. 1
- ein ZTU-Schaubild einer kontinuierlichen Abkühlung eines Schienenstücks,
- Fig. 2
- im Querschnitt eine Schiene mit eingebetteten Thermoelementen,
- Fig. 3
- ein Diagramm des Abkühlungsverlaufs an einzelnen Meßstellen gemäß Fig. 2 bei Abkühlung eines Schienenstücks mit natürlicher Konvektion,
- Fig. 4
- ein Diagramm des Abkühlungsverlaufs nach der Erfindung,
- Fig. 5
- eine schematische Darstellung einer Abkühlvorrichtung.
- A =
- Austenit
- P =
- Perlit
- Zw =
- Zwischenstufe
- M =
- Martensit
Claims (10)
- Verfahren zum Abkühlen von warmgewalzten Profilen aus der Walzhitze, wobei diese mit im Abstand über den Querschnitt angeordneten Profilteilen (10 - 12) von unterschiedlicher Masse (1 - 5) beispielsweise als Schienen ausgebildet sind, dadurch gekennzeichnet, daß zunächst unter Verwendung von meßtechnischen Mitteln (30 - 32) im Zusammenwirken mit einer Recheneinheit (40) mit Hilfe eines Rechenprogramms die den unterschiedlichen Profilteilen (10 - 12) nach Maßgabe ihrer Masse (1 - 5) und Temperatur anteilig zu entziehenden Wärmemengen und die hierfür erforderliche Aufgabemenge von Kühlmedien (48) ermittelt und berechnet und danach die Abkühlung der unterschiedlichen Profilteile (10 - 12) bzw. ihrer Massen (1 - 5) derart gesteuert vorgenommen wird, daß diese mit möglichst geringem Zeitversatz die Umwandlungslinien Ar3/Ar1 beim Zerfall des Gamma-Mischkristalls in Ferrit und/oder Perlit unter Freisetzung der Umwandlungswärme erreichen.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die weitere Abkühlung von der Umwandlungstemperatur bis auf eine vorgegebene Endtemperatur weiterhin so vorgenommen wird, daß die unterschiedlichen Massenschwerpunkte (1 - 5) des Profils mit möglichst geringem Zeitversatz die Endtemperatur erreichen.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß bei der Berechnung der den Profilteilen (10 - 12) zu entziehenden Wärmemengen die Umwandlungstemperatur der zugrunde liegenden Stahlqualität berücksichtigt wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß beim Abkühlen des Walzgutprofiles oder von Teilen (10 - 12) davon mittels z. B. Wasser die sich an den unterschiedlichen Profilflächen einstellenden Wärmeübergangszahlen ermittelt und mit diesen die für das Abkühlen der Profilflächen erforderlichen Aufgabemengen an Kühlmittel (48) vorbestimmt werden.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Profile als Schienen ausgebildet sind und die Schienen mit nach unten hängenden Köpfen (10) über ein Kühlbett (50) geführt und dabei eine gesteuerte Kühlung der unterschiedlichen Massenschwerpunkte (1 - 5) mindestens zum Teil durch natürliche Konvektion und zusätzlich aufgrund der nach Maßgabe von Masse und Temperatur den Profilteilen (10 - 12) anteilig zu entziehenden Wärmemengen durch zusätzlichen Einsatz von Kühlmedium (48) vorgenommen wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Wärmeentzug durch gezieltes und bevorzugt intermittierendes Besprühen einzelner Profilteile (10 - 12) mit Kühlmedium (48) vorgenommen wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Walzgutprofil über die ausgewalzte Länge gesehen, unterschiedlich intensiv gekühlt wird, um einen fallweise über die Profillänge vorhandenen Temperaturkeil zu kompensieren.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der gesteuerte Wärmeentzug durch Eintauchen des gesamten Walzgutprofils oder einzelner Teile (10 - 12) desselben in ein Kühlmedium, einmal oder mehrfach wiederholt, mit vorgegebenen Zykluszeiten vorgenommen wird.
- Vorrichtung zur Durchführung des Verfahrens nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß neben einem warmgewalzten Profil bevorzugt in Abständen entlang ihrer Walzlänge Mittel (30 - 32) zum Messen der Wärmestrahlung von unterschiedlichen Profilteilen wie Kopf (10), Steg (11) oder Fußteil (12) angeordnet sind, die über Datenleitungen (33 - 35) mit einer Recheneinheit (40) in Verbindung stehen, in welche mit einer Input-Datenleitung (36) die Abmessungen bzw. Massen dieser Profilteile eingegeben werden und die so programmiert ist, daß sie das Produkt aus Temperatur und Masse errechnet und nach Maßgabe dieses Produktes Kühlmittelaufgabevorrichtungen (45 - 47) über eine Signalleitung (37) steuert.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß ein Kühlbett (50) steuerbare Kühlmittelaufgabevorrichtungen (45 - 47) für unterschiedliche Kühlmedien (48), z.B. Wasser, Luft, Wasser/Luft-Gemische aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19503747 | 1995-02-04 | ||
DE19503747A DE19503747A1 (de) | 1995-02-04 | 1995-02-04 | Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0725152A1 EP0725152A1 (de) | 1996-08-07 |
EP0725152B1 true EP0725152B1 (de) | 2000-03-08 |
Family
ID=7753229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96100807A Expired - Lifetime EP0725152B1 (de) | 1995-02-04 | 1996-01-20 | Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0725152B1 (de) |
JP (1) | JP4020445B2 (de) |
KR (1) | KR960031630A (de) |
CN (1) | CN1076757C (de) |
AT (1) | ATE190360T1 (de) |
DE (2) | DE19503747A1 (de) |
ES (1) | ES2144161T3 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0807692A1 (de) * | 1996-05-15 | 1997-11-19 | Sms Schloemann-Siemag Aktiengesellschaft | Verfahren zum Kühlen von Profilstahl-Trägern |
CN1083013C (zh) * | 1996-09-29 | 2002-04-17 | 攀枝花钢铁(集团)公司 | 利用轧制余热生产高强度钢轨的热处理方法及其装置 |
DE19962891A1 (de) * | 1999-12-23 | 2001-06-28 | Sms Demag Ag | Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen |
DE10137596A1 (de) * | 2001-08-01 | 2003-02-13 | Sms Demag Ag | Verfahren zur Kühlung von Werkstücken, insbesondere von Profilwalzprodukten, aus Schienenstählen |
JP2007302946A (ja) * | 2006-05-11 | 2007-11-22 | Daido Steel Co Ltd | 合金鋼の製造方法 |
RU2456352C1 (ru) * | 2010-11-11 | 2012-07-20 | Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" | Способ и устройство термической обработки рельсов |
CN104307880A (zh) * | 2014-11-10 | 2015-01-28 | 江苏亨特宏业重工有限公司 | 热轧机用节能式冷却机构 |
CN104561496B (zh) * | 2014-12-25 | 2017-01-18 | 内蒙古科技大学 | 一种钢轨热处理用汽雾冷却实验装置 |
CN105349769B (zh) * | 2015-12-08 | 2017-11-14 | 中国铁道科学研究院金属及化学研究所 | 一种钢轨闪光焊缝自动检测设备 |
CN107335770B (zh) * | 2017-02-20 | 2019-05-10 | 湖北武铁山桥轨道装备有限公司 | 钢轨热处理系统和热处理工艺 |
CN109136514A (zh) * | 2018-10-31 | 2019-01-04 | 攀钢集团攀枝花钢铁研究院有限公司 | 热处理后钢轨输送装置 |
CA3130062C (en) * | 2019-03-15 | 2023-09-26 | Nippon Steel Corporation | Railway rail |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE404127C (de) * | 1924-02-16 | 1924-10-13 | Cie Des Forges De Chatillon Co | Verfahren zum Richten von Metallstangen unsymmetrischen Querschnittes, im besonderen on Eisenbahnschienen |
DE1220876B (de) * | 1962-04-26 | 1966-07-14 | Kloeckner Werke Ag | Verfahren zum Abkuehlen gewalzter Profile, insbesondere Schienen |
DE1433715A1 (de) * | 1964-01-17 | 1968-12-12 | Breitenbach Gmbh Ed | Verfahren zur Waermebehandlung von schweren Werkstuecken aus Schmiede- oder Gussstahl |
FR2109121A5 (de) * | 1970-10-02 | 1972-05-26 | Wendel Sidelor | |
US4486248A (en) * | 1982-08-05 | 1984-12-04 | The Algoma Steel Corporation Limited | Method for the production of improved railway rails by accelerated cooling in line with the production rolling mill |
EP0151194A1 (de) * | 1984-01-28 | 1985-08-14 | VEB Stahl- und Walzwerk "Wilhelm Florin" Hennigsdorf | Verfahren zur Verbesserung der Geradheit von Walzstahl |
DE4237991A1 (de) * | 1992-11-11 | 1994-05-19 | Schloemann Siemag Ag | Verfahren und Vorrichtung zur Abkühlung von warmgewalzten Profilen insbesondere von Schienen |
-
1995
- 1995-02-04 DE DE19503747A patent/DE19503747A1/de not_active Withdrawn
-
1996
- 1996-01-20 AT AT96100807T patent/ATE190360T1/de active
- 1996-01-20 ES ES96100807T patent/ES2144161T3/es not_active Expired - Lifetime
- 1996-01-20 EP EP96100807A patent/EP0725152B1/de not_active Expired - Lifetime
- 1996-01-20 DE DE59604567T patent/DE59604567D1/de not_active Expired - Lifetime
- 1996-01-24 KR KR1019960001475A patent/KR960031630A/ko not_active Application Discontinuation
- 1996-02-01 JP JP01673496A patent/JP4020445B2/ja not_active Expired - Fee Related
- 1996-02-02 CN CN96104086A patent/CN1076757C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59604567D1 (de) | 2000-04-13 |
ES2144161T3 (es) | 2000-06-01 |
CN1139595A (zh) | 1997-01-08 |
JP4020445B2 (ja) | 2007-12-12 |
ATE190360T1 (de) | 2000-03-15 |
JPH08239719A (ja) | 1996-09-17 |
CN1076757C (zh) | 2001-12-26 |
KR960031630A (ko) | 1996-09-17 |
EP0725152A1 (de) | 1996-08-07 |
DE19503747A1 (de) | 1996-08-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0725152B1 (de) | Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen | |
DE68916603T2 (de) | Verfahren zur schnellen Direktkühlung warmgewalzter Drähte. | |
WO2003012151A1 (de) | Verfahren zur kühlung von werkstücken insbesondere von profilwalzprodukten aus schienenstählen | |
AT409268B (de) | Verfahren und einrichtung zum härten von schienen | |
AT410549B (de) | Vorrichtung zum vergüten von walzgut mit grosser länge | |
DE3728498C2 (de) | Vorrichtung zur Wärmebehandlung von Schienen | |
DE69523589T2 (de) | Verfahren zur erhöhung der dehngrenze von kaltgeformten stahlprofilen | |
EP1111074B1 (de) | Verfahren und Vorrichtung zum Abkühlen von warmgewalzten Profilen | |
EP0693562B1 (de) | Verfahren und Vorrichtung zur Wärmebehandlung von profiliertem Walzgut | |
DE69319285T2 (de) | Verfahren zum Wärmebehandeln von Walzdraht | |
US6689230B1 (en) | Method and apparatus for cooling hot-rolled sections | |
EP3159419A1 (de) | Verfahren zum erzeugen rollgeformter teilgehärteter profile | |
DE3638816C1 (en) | Method for the production of steel rails with low residual stress by means of roller straightening | |
DE3501522C1 (de) | Verfahren zur Herstellung eigenspannungsarmer Stahlschienen mittels Rollenrichten | |
DE3307041A1 (de) | Verfahren und vorrichtung zum serienmaessigen, verzugsarmen haerten von werkstuecken sowie anwendung des verfahrens | |
DE2541978B2 (de) | Verfahren zur waermebehandlung von weichenteilen im durchlaufverfahren | |
EP0442864B1 (de) | Verfahren und Anordnung zum Walzen von Stab- und Drahtmaterial | |
DE1917778A1 (de) | Verfahren zur Herstellung von Betonbewehrungsstahl mit hoher Streckfestigkeit und verbesserter Schweissbarkeit | |
EP0036670B1 (de) | Anlage zum Regenerieren von offenen Profilstählen | |
DE19828785C2 (de) | Verfahren zum Richten von gewalztem Profilstahl | |
AT396073B (de) | Verfahren zum warmwalzen und waermebehandeln von stabfoermigem material | |
DE4233462C2 (de) | Verfahren zur Erhöhung der Zugfestigkeit und der Zähigkeit von martensitischen Stahldrähten und Vorrichtung zur Durchführung des Verfahrens | |
DE2501175C3 (de) | Vorrichtung zur Wärmebehandlung von Profilstahlabschnitten für den untertägigen Streckenausbau | |
DE3529379C2 (de) | ||
DE2601625B2 (de) | Verfahren und Vorrichtung zum Vergüten dünnwandiger Großrohre aus Stahl |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19960202 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE ES FR GB IT LU |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19990423 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE DE ES FR GB IT LU |
|
REF | Corresponds to: |
Ref document number: 190360 Country of ref document: AT Date of ref document: 20000315 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 59604567 Country of ref document: DE Date of ref document: 20000413 |
|
ET | Fr: translation filed | ||
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: SMS DEMAG AG |
|
ITF | It: translation for a ep patent filed | ||
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20000505 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2144161 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20140123 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20140122 Year of fee payment: 19 Ref country code: BE Payment date: 20140121 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20140129 Year of fee payment: 19 Ref country code: AT Payment date: 20140113 Year of fee payment: 19 Ref country code: IT Payment date: 20140131 Year of fee payment: 19 Ref country code: FR Payment date: 20140123 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20140121 Year of fee payment: 19 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150131 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59604567 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150120 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 190360 Country of ref document: AT Kind code of ref document: T Effective date: 20150120 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20150120 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 59604567 Country of ref document: DE Representative=s name: GIHSKE GROSSE KLUEPPEL KROSS BUEROGEMEINSCHAFT, DE Ref country code: DE Ref legal event code: R081 Ref document number: 59604567 Country of ref document: DE Owner name: SMS GROUP GMBH, DE Free format text: FORMER OWNER: SMS SIEMAG AKTIENGESELLSCHAFT, 40237 DUESSELDORF, DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150801 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150120 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20150930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150120 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150120 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20160226 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150121 |