EP0757110B1 - Verfahren zur Wärme-bzw. Vergütebehandlung eines Gleisteils - Google Patents

Verfahren zur Wärme-bzw. Vergütebehandlung eines Gleisteils Download PDF

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Publication number
EP0757110B1
EP0757110B1 EP96109815A EP96109815A EP0757110B1 EP 0757110 B1 EP0757110 B1 EP 0757110B1 EP 96109815 A EP96109815 A EP 96109815A EP 96109815 A EP96109815 A EP 96109815A EP 0757110 B1 EP0757110 B1 EP 0757110B1
Authority
EP
European Patent Office
Prior art keywords
track part
over
track
dipping
process according
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
EP96109815A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0757110A1 (de
Inventor
Gerhard Ing. Ratz
Stefan Dipl.-Ing. Schmedders
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 Germany GmbH
Original Assignee
Voestalpine BWG GmbH
Butzbacher Weichenbau 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 BWG GmbH, Butzbacher Weichenbau GmbH filed Critical Voestalpine BWG GmbH
Publication of EP0757110A1 publication Critical patent/EP0757110A1/de
Application granted granted Critical
Publication of EP0757110B1 publication Critical patent/EP0757110B1/de
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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/63—Quenching devices for bath 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
    • C21D9/04—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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")

Definitions

  • the invention relates to a method for tempering a track part, in particular Turnout part like spring tongue or centerpiece over the entire cross-section, the track part preferably has changing cross-sectional shapes along its length.
  • a method for the heat treatment of rails can be found in WO 94/02652.
  • the rail becomes an undesirable hardening of the much thinner webs partially immersed in a coolant bath containing synthetic additives with her head, while the rail foot is cooled with compressed air and / or a water-air mixture becomes.
  • desired hardness or hardness distributions can be achieved in the rail head can be achieved because the splint is the same over its entire length in the head area Has cross sections.
  • DE-C-262 970 describes a method and an apparatus for achieving various Degrees of hardness and toughness of elongated objects are known. To do this, the subject passed through various baths of oil and water.
  • DE-A 28 20 784 shows a method for producing rails, at which the rail head should be hardened. There is the Possibility of completely or solely in the head area in a coolant immerse, which has aggregates to the heat transfer from the rail to the Increase bath.
  • DE-C-396 946 provides that the curing object is immersed several times in a cooling bath.
  • the present invention is based on the problem of a method as described in the introduction Kind in such a way that track parts in particular along with their length changing cross-sectional shapes over the entire cross-section to a desired structure such as preferably fine pearlitic training can be reproducibly remunerated.
  • the teaching according to the invention makes the cooling rate more uniform about the cross section of the track part, with an adaptation to different cross-sectional shapes this is done in that the track part alternately in cyclical sequence or completely and / or inclined in the coolant.
  • the desired equalization of remuneration takes place across the entire cross-section, so that voltage differences are largely avoided without the There is a risk that undesired hardening will occur in the areas of the track part. in which there are reduced cross sections compared to the head area.
  • rail parts in particular switch parts, are in their Travel areas, whereby finished machined track parts are heat treated. After Remuneration is then only necessary that necessary holes are drilled or for example a spring point is milled.
  • the tab chambers can be equipped with compensation tabs and / or inorganic products such as concrete to be filled in these critical areas to prevent undesirable cooling speeds of the track part.
  • the cooling process is followed by a tempering treatment for targeted microstructure adjustment.
  • the necessary straightening processes are used to avoid changes in tension and structure performed at elevated temperatures.
  • the immersion times t 1 , t 3 , ... t n-2 , t n can be selected so that the track part is specifically cooled over its entire cross-section such that t 1 ⁇ t 3 and / or t 3 ⁇ t 5 and / or t n-2 ⁇ t n , in particular t 1 ⁇ t n . In this way, necessary predetermined structures are reproducibly achieved.
  • the heat or heat treatment according to the invention can be used for a track part made of rail steel of a quality such as S 1100V or 900A or 1100 according to UIC 860V with a directional analysis of, for example 0.53 - 0.62% C, 0.15 - 0.25% Si, 0.65 - 1.1% Mn, 0.8 - 1.3% Cr, 0.05 - 0.11% Mo, 0.05 - 0.11% V, ⁇ 0.02 P, optionally up to 0.025 Al, optionally 0.5% Nb, residual iron as well as common contamination caused by melting.
  • a quality such as S 1100V or 900A or 1100 according to UIC 860V with a directional analysis of, for example 0.53 - 0.62% C, 0.15 - 0.25% Si, 0.65 - 1.1% Mn, 0.8 - 1.3% Cr, 0.05 - 0.11% Mo, 0.05 - 0.11% V, ⁇ 0.02 P, optionally up to 0.025 Al, optionally 0.5% Nb, residual iron as
  • the track part - preferably several corresponding track parts at the same time - is preferably lying on its head the entire length is heated, for example in a gas-heated tempering furnace, to an austenitizing temperature T II at a controllable rate and is kept at this temperature for a predetermined time.
  • the temperature T II can be adjusted over a wide range of the steel brand used. Temperatures T II between approximately 850 ° C and 900 ° C are possible.
  • the track parts are removed from the tempering furnace and it takes place controlled immersion of the track parts in a quenching bath downstream of the tempering furnace, in which there is a water-miscible synthetic cooling medium.
  • the track parts are subjected to a cyclical cooling process in such a way that the rail parts alternately partially or completely immersed in the coolant bath.
  • the cooling process itself is like monitoring and limiting the process parameters Concentration and temperature of the cooling medium, immersion cycle, immersion depth etc. certainly.
  • the heat treatment method according to the invention is to be based on a welded one Centerpiece.
  • the centerpiece was made of high quality rail steel 900A according to UIC conditions.
  • the rising edge I is intended to illustrate the heating of the track part to the austenitizing temperature.
  • the track part After reaching the austenitizing temperature, the track part is held at austenitizing temperature T II for a predetermined period of time, in order then to be immediately quenched in a coolant bath, as a result of which the desired conversion into the predetermined structure takes place.
  • This area is marked III in the diagram according to FIG. 1.
  • starting flank IV
  • T V which can be, for example, 1-2 hours.
  • T V which can be, for example, 1-2 hours.
  • cooling in still air (falling flank VI) which may require straightening of the track part. This can be carried out in a temperature range that is just below 300 ° C.
  • the welded heart is cyclically partially or completely into one coolant bath (10) containing water-miscible synthetic medium in a targeted manner submerged that a desired even cooling with the cross section of the centerpiece he follows.
  • FIG Line (120) symbolizes that with respect to the frog cross-sectional representations (12), (14), (16), (18) runs in such a way that the centerpiece either only in its head area or is completely immersed in the coolant bath (10).
  • the cross sections (12), (14), (16) and (18) should further clarify that the centerpiece is always along its entire length completely or partially (head area) is immersed in the coolant bath (10).
  • the track part is first immersed only with its head region over a period t 1 . Over a subsequent, but shorter period of time t 2, the track part is completely immersed. Then the track part is partially lifted out of the coolant over a period t 3 with t 3 ⁇ t 1 in order to again cool only the head region in the coolant bath (10). This is followed by a period of time t 4 , in which the track part is completely immersed, followed by an immersion of the head area alone over a period of time t 5 ⁇ t 3 .
  • T v can be between 400 and 550 ° C.
  • the period t v can be 1-2 hours. This creates the specified structure and a tension compensation across the cross section.
  • a heat treatment of a wing rail (22) from a Material S 1100V can be clarified in principle, with regard to heating up Austenitizing temperature, holding to austenitizing temperature, tempering and cooling in principle a process - even if it differs in time and temperature - takes place, which corresponds to that which has been illustrated with reference to FIGS. 1 and 2.
  • the wing rail (22) is first initially over a time period t 0 completely into the coolant bath (10) immersed in order to then via one of the time duration t 0 corresponding time t 1 alone head in the coolant bath (10) to leave. This is followed by the complete or partial immersion of the wing rail (22) over the same time sequences t 2 t 3 and t 4 , and then over a period of time compared to the periods t 0 or t 1 or t 2 or t 3 and t 4 t 5 considerably longer period of time to leave the head of the wing rail (22) in the coolant bath (10) alone.
  • the coolant bath (10) is then removed in order to leave the wing rail (22) on - in accordance with the procedure shown in FIG. 1. This is followed by cooling in still air (flank VI), whereby the wing rail (22) can be straightened. This temperature range can be just below 300 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Articles (AREA)
  • Magnetic Heads (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
EP96109815A 1995-06-28 1996-06-19 Verfahren zur Wärme-bzw. Vergütebehandlung eines Gleisteils Expired - Lifetime EP0757110B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19523542 1995-06-28
DE19523542A DE19523542A1 (de) 1995-06-28 1995-06-28 Verfahren zur Wärme- bzw. Vergütebehandlung eines Gleisteils

Publications (2)

Publication Number Publication Date
EP0757110A1 EP0757110A1 (de) 1997-02-05
EP0757110B1 true EP0757110B1 (de) 2001-10-04

Family

ID=7765497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109815A Expired - Lifetime EP0757110B1 (de) 1995-06-28 1996-06-19 Verfahren zur Wärme-bzw. Vergütebehandlung eines Gleisteils

Country Status (5)

Country Link
EP (1) EP0757110B1 (da)
AT (1) ATE206475T1 (da)
DE (2) DE19523542A1 (da)
DK (1) DK0757110T3 (da)
ES (1) ES2165453T3 (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011014877A1 (de) 2011-03-23 2012-09-27 Db Netz Ag Verfahren zum Umschmieden eines Gleisteils und gemäß diesem Verfahren umgeschmidete Gleisteile

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE262970C (da) *
DE396946C (de) * 1921-12-01 1924-06-16 Cie Des Forges De Chatillon Co Verfahren und Vorrichtung zum Haerten von Gegenstaenden
DE582957C (de) * 1926-10-22 1933-08-25 Maximilianshuette Eisenwerk Verfahren zum Vergueten von Eisenbahnschienen
DE629758C (de) * 1934-03-15 1936-05-13 Laminoirs Hauts Fourneaux Forg Verfahren zum Teilhaerten und gleichzeitigen Richten von Schienen
US2095946A (en) * 1934-03-31 1937-10-12 Chiers Hauts Fourneaux Apparatus for tempering rails
BE447082A (da) * 1941-11-22
DE826304C (de) * 1948-10-02 1951-12-27 Dortmunder Union Brueckenbau A Haerten der UEberhoehung von Eisenbahnschienen
DE1508415B1 (de) * 1966-05-05 1970-11-26 Krupp Ag Huettenwerke Verfahren zur Waermebehandlung von Schienen,insbesondere Eisenbahnschienen aus Stahl
BE854834A (fr) * 1977-05-18 1977-09-16 Centre Rech Metallurgique Procede de fabrication de rails a caracteristiques ameliorees

Also Published As

Publication number Publication date
DE19523542A1 (de) 1997-01-02
DE59607812D1 (de) 2001-11-08
DK0757110T3 (da) 2002-01-14
ES2165453T3 (es) 2002-03-16
ATE206475T1 (de) 2001-10-15
EP0757110A1 (de) 1997-02-05

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