EP0247021A2 - Dispositif pour le traitement thermique commandé de pièces d'aiguillages - Google Patents

Dispositif pour le traitement thermique commandé de pièces d'aiguillages Download PDF

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Publication number
EP0247021A2
EP0247021A2 EP87890068A EP87890068A EP0247021A2 EP 0247021 A2 EP0247021 A2 EP 0247021A2 EP 87890068 A EP87890068 A EP 87890068A EP 87890068 A EP87890068 A EP 87890068A EP 0247021 A2 EP0247021 A2 EP 0247021A2
Authority
EP
European Patent Office
Prior art keywords
nozzles
nozzle
spherical
section
temperature
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.)
Granted
Application number
EP87890068A
Other languages
German (de)
English (en)
Other versions
EP0247021A3 (en
EP0247021B1 (fr
Inventor
Johannes Dipl.-Ing. Blumauer
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.)
Voestalpine Turnout Technology Zeltweg GmbH
Original Assignee
Voestalpine AG
Voestalpine Weichensysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voestalpine AG, Voestalpine Weichensysteme GmbH filed Critical Voestalpine AG
Publication of EP0247021A2 publication Critical patent/EP0247021A2/fr
Publication of EP0247021A3 publication Critical patent/EP0247021A3/de
Application granted granted Critical
Publication of EP0247021B1 publication Critical patent/EP0247021B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the invention relates to a device for controlled heat treatment of switch parts made of steel with which after heating to austenitizing temperature, in particular 840-860 ° C, accelerated cooling to a transition temperature between 450 ° C and 650 ° C using a gaseous and / or liquid coolant is made.
  • the compressed air can hiebei water, steam or the like. be added.
  • a disadvantage of this known embodiment is that in turn only the tread and thus the upper surface area of the switch parts is subjected to a heat treatment. In view of the different profile shapes of such switch parts, heat treatment, which covers the entire cross section of the switch parts evenly, does not appear to be readily possible.
  • a device for cooling rail steels has become known from EO-A2-0 161 236, in which a plurality of nozzles are arranged distributed over the circumference of the rail cross section. The arrangement is adapted to a specific rail profile shape.
  • Several spray nozzles for finely divided water have also been proposed in DE-OS 32 09 918 in order to achieve a corresponding cooling of the rail profile.
  • DE-PS 249 086 more complicated components, such as frogs, were supplied with coolant by means of appropriately shaped nozzle assemblies.
  • the invention now aims to provide a device of the type mentioned at the outset, with which the heat treatment can be carried out not only in areas close to the surface, but also over the entire profile, wherein different profiles can be taken into account, in order in this way an increased Security against brittle fractures and more favorable mechanical properties, in particular to achieve better impact strength over the entire component cross section.
  • the inventive device of the type mentioned is essentially characterized in that at least two nozzle assemblies are provided with a plurality of nozzles adjustable in their jet direction.
  • the arrangement of at least two nozzle assemblies means that a plurality of nozzles can be spread over a larger area of the surface of the component, in particular on different sides of the component, against the component which has previously been brought completely to the austenitizing temperature, for example in an oven aim, whereby the nozzles of the nozzle sticks are adjustable in their jet direction, jet directions adapted to the respective profile can be selected, which enable accelerated cooling over the entire cross-section to the transition temperature and maintenance at the transition temperature.
  • the desired cooling characteristics can be achieved through the nozzles adjustable in their jet direction even with different profile shapes over the entire profile cross-section, with the nozzles also advantageously being designed to be throttled in order to achieve the most uniform possible temperature distribution over the To achieve cross section of the irregular component.
  • the nozzles are advantageously releasably connected to the nozzle assembly, and individual nozzles can be exchanged, for example for the purpose of setting the desired amount of compressed air per nozzle.
  • a device which can be adapted particularly well to different cross-sectional profiles is created in that the nozzles are designed as bores in spherical nozzle bodies, in particular spherical bearing surfaces, and in that the spherical, in particular spherical bearing surfaces can be pressed against spherical and / or hollow-conical seat surfaces of the nozzle assembly, the Coolant supply flows into the seat surfaces of the nozzle assembly.
  • the seat surface of the nozzle body can be formed with edges that overlap, for example, spherical nozzle body, so that the nozzle body is directly held by being pressed into the spherical seat surface.
  • the direction of the jet can be influenced in a simple manner and if a nozzle body with an asymmetrical nozzle cross section is selected, can be achieved by turning the nozzle body, for example by 180 °, a completely different jet characteristic.
  • One of the two sides can be designed, for example, as a soft-jet nozzle and the other, after turning through 180 °, the nozzle side which takes effect as a narrow-jet nozzle.
  • the design is advantageously made such that the nozzle assemblies each have at least one coolant supply line, into which a control valve is switched on.
  • FIG. 1 shows a schematic perspective view of the device according to the invention
  • 2 shows a detail of a fixation of a nozzle on the nozzle assembly
  • FIG. 3 shows the strength depth profile which can be achieved with the device according to the invention according to FIGS. 1 and 2 by treating the entire profile cross section of a switch part.
  • 1 denotes two nozzle assemblies, to the coolant supply of which separate control valves 2 are connected.
  • the switch part to be treated is designated 3 and, after being brought to the austenitizing temperature over its entire cross section in an oven, is placed on the device according to the invention according to FIG. Compressed air is injected via the nozzle assemblies 1 and is expelled against the switch part 3 via nozzles 4.
  • Such a nozzle 4 is shown enlarged in the illustration according to FIG.
  • the nozzle 4 is latched in a seat part 5, which has a spherical seat 6.
  • the nozzle 4 is provided as a bore 7 in a spherical nozzle body 8 and can be rotated in the spherical seat 6 of the seat part 5 so that the axis 9 of the jet direction of the nozzle is adjustable.
  • the conically widening part 11 of the nozzle body 8 reaches the outside, so that a soft outflow is effected in this way.
  • a comparatively hard jet emerges through the bore 7.
  • the spherical seat 6 of the seat body 5 merges into a conical funnel 12, in the bottom of which the supply line 13 for the coolant opens.
  • the seat part 5 can be fixed, for example, by means of the thread 14 on the nozzle assembly 1 according to FIG. 1.
  • the direction and the jet characteristics of the nozzle can be adjusted by correspondingly adjusting the axis 9 of the nozzle body 8, a plurality of such nozzles being contained in the nozzle assemblies 1.
  • Natural hard or machined parts made of rail steels with analysis were brought to austenitizing temperature 840-860 ° C in a heat treatment furnace and then accelerated to a transformation temperature of 450-650 ° C by means of a device according to Fig. 1 and 2 using compressed air (approx. 7 atm). The temperature was measured using a milliscope or contact thermometer. Appropriate adjustment of the compressed air nozzles with regard to the jet direction and jet cross-section ensured a uniform structure across the different cross-sectional shapes of the switch parts and also a holding time necessary for the complete conversion to the pearlite stage due to the residual heat present in the component core. After the conversion had taken place, the mixture was cooled further in still air or by a quenching medium such as H2O or oil.
  • a quenching medium such as H2O or oil.
  • the cooling rate could be controlled in such a way that a gradual decrease in strength occurred at the welding ends of the components. Since the wheel overflow components, such as the centerpiece tip and wing rails, are usually welded with rails of 880 N / mm2 minimum strength, this offers the advantage of a gradual change in strength, with which no dents, which result from an abrupt jump in strength, can occur.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
EP19870890068 1986-05-22 1987-04-08 Dispositif pour le traitement thermique commandé de pièces d'aiguillages Expired - Lifetime EP0247021B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT137186A AT384624B (de) 1986-05-22 1986-05-22 Einrichtung zur gesteuerten waermebehandlung von weichenteilen
AT1371/86 1986-05-22

Publications (3)

Publication Number Publication Date
EP0247021A2 true EP0247021A2 (fr) 1987-11-25
EP0247021A3 EP0247021A3 (en) 1988-09-07
EP0247021B1 EP0247021B1 (fr) 1991-12-04

Family

ID=3512440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870890068 Expired - Lifetime EP0247021B1 (fr) 1986-05-22 1987-04-08 Dispositif pour le traitement thermique commandé de pièces d'aiguillages

Country Status (3)

Country Link
EP (1) EP0247021B1 (fr)
AT (1) AT384624B (fr)
DE (1) DE3774931D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014230A1 (fr) * 1992-01-11 1993-07-22 Bwg Butzbacher Weichenbau Gmbh Tronçon de voie ferree et son procede de fabrication
EP0924003A3 (fr) * 1997-12-18 2000-08-16 VOEST-ALPINE Industrieanlagenbau GmbH Dispositif de refroidissement pour refroidir une bande métallique chaude en mouvement
CN103898303A (zh) * 2012-12-31 2014-07-02 攀钢集团攀枝花钢铁研究院有限公司 一种道岔轨的热处理方法和道岔轨
EP2573194A4 (fr) * 2010-11-11 2014-12-03 Scient Mfg Entpr Tom Electronic Company Ltd Procédé et dispositif de traitement thermique de rails

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401359B (de) * 1991-04-05 1996-08-26 Vae Ag Verfahren zur herstellung eines herzstückes
EP4348148B1 (fr) * 2021-05-31 2026-01-14 SMS group GmbH Refroidissement forcé par circulation d'air pour refroidir des produits longs en acier

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE249086C (fr) *
FR2109121A5 (fr) * 1970-10-02 1972-05-26 Wendel Sidelor
DE2541978C3 (de) * 1975-09-20 1978-08-24 Butzbacher Weichenbau Gmbh, 6308 Butzbach Verfahren zur Wärmebehandlung von Weichenteilen im Durchlaufverfahren
DE3209918A1 (de) * 1982-03-18 1983-10-06 Kloeckner Werke Ag Verfahren zum waermebehandeln von weichenteilen
BE899617A (fr) * 1984-05-09 1984-11-09 Centre Rech Metallurgique Procede et dispositif perfectionnes pour la fabrication de rails.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014230A1 (fr) * 1992-01-11 1993-07-22 Bwg Butzbacher Weichenbau Gmbh Tronçon de voie ferree et son procede de fabrication
US5482576A (en) * 1992-01-11 1996-01-09 Bwg Butzbacher Weichenbau, Gmbh Railway-track elements and method of manufacturing them
EP0924003A3 (fr) * 1997-12-18 2000-08-16 VOEST-ALPINE Industrieanlagenbau GmbH Dispositif de refroidissement pour refroidir une bande métallique chaude en mouvement
US6178768B1 (en) 1997-12-18 2001-01-30 Voest-Alpine Indstrienlagenbau Gmbh Cooling device for cooling a hot, moving metal strip
EP2573194A4 (fr) * 2010-11-11 2014-12-03 Scient Mfg Entpr Tom Electronic Company Ltd Procédé et dispositif de traitement thermique de rails
CN103898303A (zh) * 2012-12-31 2014-07-02 攀钢集团攀枝花钢铁研究院有限公司 一种道岔轨的热处理方法和道岔轨
CN103898303B (zh) * 2012-12-31 2016-06-08 攀钢集团攀枝花钢铁研究院有限公司 一种道岔轨的热处理方法和道岔轨

Also Published As

Publication number Publication date
DE3774931D1 (de) 1992-01-16
EP0247021A3 (en) 1988-09-07
ATA137186A (de) 1987-05-15
EP0247021B1 (fr) 1991-12-04
AT384624B (de) 1987-12-10

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