WO1995017529A1 - Process for producing rail wheels and parts thereof - Google Patents

Process for producing rail wheels and parts thereof Download PDF

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Publication number
WO1995017529A1
WO1995017529A1 PCT/EP1994/004116 EP9404116W WO9517529A1 WO 1995017529 A1 WO1995017529 A1 WO 1995017529A1 EP 9404116 W EP9404116 W EP 9404116W WO 9517529 A1 WO9517529 A1 WO 9517529A1
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WIPO (PCT)
Prior art keywords
maximum
rolling
rail
hot
temperature
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Application number
PCT/EP1994/004116
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German (de)
French (fr)
Inventor
Bernd Velten
Gerd Herbold
Jürgen Schneider
Original Assignee
Vereinigte Schmiedewerke Gmbh
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Publication of WO1995017529A1 publication Critical patent/WO1995017529A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • 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
    • C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims

Definitions

  • the invention relates to a method for producing rail wheels and rail wheel parts from steel blocks, which are forged at about 1300 ° C. and, after forging, are hot-formed by upsetting and punching into ring bodies, whereupon the ring bodies are hot-rolled into blanks in the same heat formed with predetermined rolling dimensions and finally brought to the final dimensions of the rail wheels or rail wheel parts by mechanical cold working.
  • the invention is therefore concerned with the production of rail wheels, which can be made in one piece as a whole, but also from a wheel disc, to which the wheel hub is also assigned, and from wheel tires.
  • the wheel disc and the tire can sit directly outside, and can also be connected to one another via rubber-elastic elements.
  • rail wheels are subject to correspondingly high requirements with regard to their strength properties, compliance with which requires regularly complex heat treatments with careful temperature control after hot rolling.
  • Steels are currently used in the manufacture of rail wheels which are recorded, for example, under the German material numbers 1.1206, 1.1210 and 1.2824 and have carbon contents of more than 0.41%.
  • REPLACEMENT TT (RULE 26) 0.05 to 0.2% V and 0.02 to 0.1% Nb can be used, which can also contain small amounts of Cr, Ni and Mo and have the usual P and S contents. Due to different stresses on the rail on the one hand and the rail wheel on the other hand, and also on account of the actual wear behavior, this cannot be transferred into an economical production process for rail wheels according to DE PS 34 46 794. In contrast to the continuous process for long products, the economy also stands in the way of individual piece handling in the manufacture of rail wheels.
  • the object of the invention is to improve the economy of the generic method without having to accept disadvantages with regard to the properties of the rail wheels and rail wheel parts.
  • Remainder iron and melting-related admixtures are used, whereby the hot rolling of the ring body begins after the temperature of the ring body has been brought to 1050 to 940 ° C and after the rolling process the wheel tire blank is cooled so that the temperature drop from 800 to 600 ° C in 7 to 15 minutes occurs and finally without further
  • ERS ⁇ ZBLA ⁇ (RULE 26) Heat treatment the cold working is carried out.
  • the controlled cooling from 800 to 600 ° C. preferably takes place within a time interval of approximately 10 minutes.
  • the invention also makes it possible to do justice to differentiations in the rail wheel parts and, in particular for the production of wheel disks with an integrated wheel hub, which are usually supposed to be somewhat tougher, suggests that steels are used with (in mass%)
  • wheel tires can be set somewhat more brittle by using steels with (in mass%) after an embodiment of the method, in particular for the production of rail wheel parts that have rail contact when used as intended.
  • the hot rolling is carried out regularly at temperatures around 1050 ° C., in the invention advantageously also at reduced temperatures, with the rolling of the ring body only to be started after the temperature of the ring body has been reduced to about 950 ° C.
  • the hot rolling is then carried out with a negative energy balance from the forming heat and heat removal in such a way that at the end of the hot rolling, a final rolling temperature in the range of 900 ° C. has occurred in the blank produced.
  • the economic effect of the invention is significant, especially in the case of wheel tires with diameters over 1000 mm; the quality of the rail wheels and rail wheel parts can be kept at a high level.

Abstract

A process for producing rail wheels and parts thereof from steel blocks by forging, swaging, punching, hot-rolling and final mechanical processing makes use of precipitation hardenable ferrite-perlite steels with (in mass %): C 0.25 to 0.40, Si 0.4 to 0.9, Mn 1.2 to 1.6, P 0.015 max., S 0.015 max., Al 0.03 max., N 0.01 to 0.03, Cr 0.10 to 0.5, Ni 0.15 max., Mo 0 to 0.1, V 0.06 to 0.15 and Ti 0 to 0.04, with the remainder iron, in which the hot-rolling of the annular body begins after its temperature has reached 1050 to 940 °C and at the end of the hot-rolling a final rolling temperature in the wheel blank produced has preferably stabilised at 900 °C, whereupon the blank is finally cooled and the final mechanical machining is performed without further heat treatment.

Description

Verfahren zur Herstellung von Schienenrädern und Schienen- radteilenProcess for the production of rail wheels and rail wheel parts
Die Erfindung betrifft ein Verfahren zur Herstellung von Schie¬ nenrädern und Schienenradteilen aus Stahlblöcken, die bei etwa 1300 °C geschmiedete und nach dem Schmieden warm durch Stauchen und Lochen zu Ringkörper umgeformt werden, worauf die Ringkör¬ per in der gleichen Hitze durch Warmwalzen zu Rohlingen mit vorgegebenen Walzmaßen umgeformt und abschließend durch eine mechanische Kaltbearbeitung auf die Endabmessungen der Schie¬ nenräder beziehungsweise Schienenradteile gebracht werden.The invention relates to a method for producing rail wheels and rail wheel parts from steel blocks, which are forged at about 1300 ° C. and, after forging, are hot-formed by upsetting and punching into ring bodies, whereupon the ring bodies are hot-rolled into blanks in the same heat formed with predetermined rolling dimensions and finally brought to the final dimensions of the rail wheels or rail wheel parts by mechanical cold working.
Die Erfindung befaßt sich also mit der Herstellung von Schie¬ nenrädern, die insgesamt einteilig, aber auch aus Radscheibe, der auch die Radnabe zugeordnet ist, und aus Radreifen zusam¬ mengesetzt sein können. Radscheibe und Radreifen können unmit¬ telbar auxeinandersitzen, wie auch über gummielastische Elemen¬ te miteinander verbunden sein.The invention is therefore concerned with the production of rail wheels, which can be made in one piece as a whole, but also from a wheel disc, to which the wheel hub is also assigned, and from wheel tires. The wheel disc and the tire can sit directly outside, and can also be connected to one another via rubber-elastic elements.
Schienenräder unterliegen im Interesse hoher Gebrauchssicher- heit und hoher Laufleistung entsprechend hohen Anforderung be¬ züglich ihrer Festigkeitseigenschaften, deren Einhaltung regel¬ mäßig aufwendige Wärmebehandlungen mit sorgfältiger Temperatur¬ führung im Anschluß an das Warmwalzen verlangt. Bei der Schie- nenradherstellung finden derzeit Stähle Verwendung, die bei¬ spielsweise unter den deutschen Werkstoffnummern 1.1206, 1.1210 und 1.2824 erfaßt sind und Kohlenstoffgehalte über 0,41 % haben.In the interest of high operational safety and high mileage, rail wheels are subject to correspondingly high requirements with regard to their strength properties, compliance with which requires regularly complex heat treatments with careful temperature control after hot rolling. Steels are currently used in the manufacture of rail wheels which are recorded, for example, under the German material numbers 1.1206, 1.1210 and 1.2824 and have carbon contents of more than 0.41%.
Entsprechende Forderungen, aber auch hohe Härte der Lauffläche, sind auch aus der Schienenherstellung bekannt, für die nach der DE PS 3446794 Stähle mit 0,55 bis 0,82 % C, 0,25 bis 0,50 % Si, 0,8 bis 1,3 % Mn, 0,010 bis 0,070 % AI, 0,010 bis 0,025 % N,Corresponding requirements, but also high hardness of the tread, are also known from rail production, for which, according to DE PS 3446794, steels with 0.55 to 0.82% C, 0.25 to 0.50% Si, 0.8 to 1.3% Mn, 0.010 to 0.070% AI, 0.010 to 0.025% N,
ERSATZB TT (REGEL 26) 0,05 bis 0,2 % V und 0,02 bis 0, 1 % Nb eingesetzt werden, die auch geringe Anteile an Cr, Ni und Mo enthalten können und üb¬ liche P- und S- Gehalte haben. Aufgrund unterschiedlicher Bean¬ spruchung von Schiene einerseits und Schienenrad andererseits, auch aufgrund des tatsächlichen Verschleißverhaltens läßt sich das nach DE PS 34 46 794 nicht in ein wirtschaftliches Herstel¬ lungsverfahren für Schienenräder übertragen. Der Wirtschaft¬ lichkeit steht auch im Gegensatz zu Durchlaufverfahren bei Langprodukten die Einzelstückbehandlung bei der Schienenradher- stellung entgegen.REPLACEMENT TT (RULE 26) 0.05 to 0.2% V and 0.02 to 0.1% Nb can be used, which can also contain small amounts of Cr, Ni and Mo and have the usual P and S contents. Due to different stresses on the rail on the one hand and the rail wheel on the other hand, and also on account of the actual wear behavior, this cannot be transferred into an economical production process for rail wheels according to DE PS 34 46 794. In contrast to the continuous process for long products, the economy also stands in the way of individual piece handling in the manufacture of rail wheels.
Aufgabe der Erfindung ist es, die Wirtschaftlichkeit des gat¬ tungsgemäße Verfahrens zu verbessern, ohne Nachteile bezüglich der Eigenschaften der Schienenräder und Schienenradteile hin¬ nehmen zu müssen.The object of the invention is to improve the economy of the generic method without having to accept disadvantages with regard to the properties of the rail wheels and rail wheel parts.
Erfindungsgemäß wird daher vorgeschlagen, ausscheidungshärtbare ferritisch-perlitische Stähle einzusetzen, bestehend aus (in Masse %)According to the invention, it is therefore proposed to use precipitation-hardenable ferritic-pearlitic steels consisting of (in mass%)
C 0,25 bis 0,40C 0.25 to 0.40
Si 0,40 bis 0,90Si 0.40 to 0.90
Mn 1,2 bis 1,6Mn 1.2 to 1.6
P maximal 0,015P maximum 0.015
S maximal 0,015S maximum 0.015
AI maximal 0,03AI maximum 0.03
N 0,01 bis 0,03N 0.01 to 0.03
Cr 0,10 bis 0,50Cr 0.10 to 0.50
Ni maximal 0,15Ni maximum 0.15
Mo 0 bis 0,1Mo 0 to 0.1
V 0,06 bis 0,15V 0.06 to 0.15
Ti 0 bis 0,04Ti 0 to 0.04
Rest Eisen und erschmelzungsbedingte Beimengungen eingesetzt werden, wobei das Warmwalzen der Ringkörper beginnt, nachdem die Temperatur der Ringkörper auf 1050 bis 940 °C gebracht worden ist und nach Abschluß des Walzvorganges der Radreifenrohling so abgekühlt wird, daß der Temperaturrückgang von 800 auf 600 °C in 7 bis 15 Minuten eintritt und schließlich ohne weitereRemainder iron and melting-related admixtures are used, whereby the hot rolling of the ring body begins after the temperature of the ring body has been brought to 1050 to 940 ° C and after the rolling process the wheel tire blank is cooled so that the temperature drop from 800 to 600 ° C in 7 to 15 minutes occurs and finally without further
ERSÄΓZBLAΓΓ (REGEL 26) Wärmebehandlung die Kaltbearbeitung durchgeführt wird. Vorzugsweise erfolgt die gesteuerte Abkühlung von 800 auf 600 °C innerhalb eines Zeitintervalls von etwa 10 Minuten.ERSÄΓZBLAΓΓ (RULE 26) Heat treatment the cold working is carried out. The controlled cooling from 800 to 600 ° C. preferably takes place within a time interval of approximately 10 minutes.
Mit dem Einsatz der genannten Stähle, in die auch die sog. AFP Stähle mit der Bezeichnung "27 MnSiV6+Ti" und "36 MnSiV6+Ti" fallen, und der vorgeschlagenen Verfahrensführung wird eine Wiedererwärmung der warmgewalzten Rohlinge vermieden und Ener¬ gie eingespart, der Aufwand zur Temperaturführung beim Warmwal¬ zen fällt demgegenüber nicht ins Gewicht. Eine gering-fügige Verlängerung der Taktzeit zur Realisierung der erfindungs- gemäßen Temperaturführung wird durch die eingesparte Wärmenach¬ behandlung deutlich überkompensiert.With the use of the steels mentioned, which also include the so-called AFP steels with the designations “27 MnSiV6 + Ti” and “36 MnSiV6 + Ti”, and the proposed process management, reheating of the hot-rolled blanks is avoided and energy is saved, the cost of temperature control during hot rolling, on the other hand, is negligible. A slight increase in the cycle time for realizing the temperature control according to the invention is clearly overcompensated by the heat post-treatment saved.
Die Erfindung ermöglicht es auch, Differenzierungen in den Schienenradteilen gerecht zu werden, und schlägt insbesondere zur Herstellung von Radscheiben mit integrierter Radnabe, die meist etwas zäher sein sollen, vor, daß Stähle eingesetzt wer¬ den mit (in Masse %)The invention also makes it possible to do justice to differentiations in the rail wheel parts and, in particular for the production of wheel disks with an integrated wheel hub, which are usually supposed to be somewhat tougher, suggests that steels are used with (in mass%)
C 0,26 bis 0,32C 0.26 to 0.32
Si 0,60 bis 0,80Si 0.60 to 0.80
Mn 1,40 bis 1,60Mn 1.40 to 1.60
P maximal 0,01P maximum 0.01
S maximal 0,01S maximum 0.01
AI maximal 0,025AI maximum 0.025
N 0,015 bis 0,025N 0.015 to 0.025
Cr 0,15 bis 0,20Cr 0.15 to 0.20
Ni maximal 0,1Ni maximum 0.1
Mo 0 bis 0,05Mo 0 to 0.05
V 0,08 bis 0,12V 0.08 to 0.12
Ti 0,018 bis 0,03Ti 0.018 to 0.03
Rest Eisen und erschmelzungsbedingte Beimengungen.Remainder iron and melting-related admixtures.
Radreifen können demgegenüber etwas spröder eingestellt werden, indem nach einer Ausgestaltung des Verfahrens, also insbeson¬ dere zur Herstellung von Schienenradteilen, die beim bestim¬ mungsgemäßen Gebrauch Schienenkontakt haben, Stähle eingesetzt werden mit (in Masse %) C 0,33 bis 0,37In contrast, wheel tires can be set somewhat more brittle by using steels with (in mass%) after an embodiment of the method, in particular for the production of rail wheel parts that have rail contact when used as intended. C 0.33 to 0.37
Si 0,60 bis 0,70Si 0.60 to 0.70
Mn 1,30 bis 1,50Mn 1.30 to 1.50
P maximal 0,01P maximum 0.01
S maximal 0,01S maximum 0.01
AI maximal 0,025AI maximum 0.025
N 0,015 bis 0,025N 0.015 to 0.025
Cr 0,15 bis 0,20Cr 0.15 to 0.20
Ni maximal 0,1Ni maximum 0.1
Mo 0 bis 0,02Mo 0 to 0.02
V 0,08 bis 0,12V 0.08 to 0.12
Ti 0 bis 0,03Ti 0 to 0.03
Rest Eisen und erschmelzungsbedingte Beimengungen.Remainder iron and melting-related admixtures.
Bei der konventionellen Reifenfertigung erfolgt das Warmwalzen regelmäßig bei Temperaturen um 1050 °C, bei der Erfindung vor¬ teilhafterweise auch bei abgesenkten Temperaturen, wobei mit dem Warmwalzen der Ringkörper erst begonnen werden soll, nach¬ dem die Temperatur der Ringkörper auf etwa 950 °C reduziert worden ist, wobei das Warmwalzen dann derart mit negativer Energiebilanz aus Umformwärme und Wärmeentzug durchgeführt wird, daß sich zum Ende des Warmwalzens eine im Bereich von 900 °C liegende Endwalztemperatur im erzeugten Rohling einge¬ stellt hat.In conventional tire production, the hot rolling is carried out regularly at temperatures around 1050 ° C., in the invention advantageously also at reduced temperatures, with the rolling of the ring body only to be started after the temperature of the ring body has been reduced to about 950 ° C. The hot rolling is then carried out with a negative energy balance from the forming heat and heat removal in such a way that at the end of the hot rolling, a final rolling temperature in the range of 900 ° C. has occurred in the blank produced.
Der wirtschaftliche Effekt der Erfindung ist bedeutend, insbe¬ sondere bei Radreifen mit Durchmessern über 1000 mm; die Quali¬ tät der Schienenräder und Schienenradteile kann auf einem hohen Niveau gehalten werden.The economic effect of the invention is significant, especially in the case of wheel tires with diameters over 1000 mm; the quality of the rail wheels and rail wheel parts can be kept at a high level.
Eine Versuchsreihe mit insgesamt 10 t Vormaterialeinsatz, bei der von Rundstäben mit 406 mm Durchmesser des Werkstoffes "36 MnSiV6" ausgegangen wurde, führte bei einer Profilhöhe von 140 mm zu Fertigreifenabmessungen von 1385 mm Außendurchmesser, 1200 mm Innendurchmesser und 92,5 mm Wandstärke. Von den Rund- stäben wurden Blockabschnitte von 450 kg Trenngewicht abge¬ sägt, diese bei 1300 °C geschmiedet und anschließend gestaucht und gelocht. Die Warmwalzanfangstemperatur wurde auf 950 °C festgelegt und ebenso pyrometrisch gemessen wie die Einhaltung der Walztemperaturabsenkung auf 900 °C während des Warmwalzens. Die Ablage erfolgte an ruhender Luft. Die Qualitätsprüfung der fertigen Radreifen zeigte die Erfüllung geforderter Eigenschaf¬ ten.A series of tests with a total of 10 t input material, in which round bars with a diameter of 406 mm made of "36 MnSiV6" were used, led to finished tire dimensions of 1385 mm outside diameter, 1200 mm inside diameter and 92.5 mm wall thickness with a profile height of 140 mm. Block sections of 450 kg separating weight were sawn off the round bars, these were forged at 1300 ° C. and then compressed and punched. The hot rolling start temperature was set at 950 ° C and measured pyrometrically as well as the compliance with the reduction in rolling temperature to 900 ° C during hot rolling. It was placed in still air. The quality inspection of the finished wheel tires showed the fulfillment of the required properties.
ERSATZBLÄFT(REGEL26) SPARE BLADE (RULE 26)

Claims

Patentansprüche claims
1. • Verfahren zur Herstellung von Schienenrädern und Schienen¬ radteilen aus Stahlblöcken, die bei etwa 1300 °C geschmiedete und nach dem Schmieden warm durch Stauchen und Lochen zu Ring¬ körper umgeformt werden, worauf die Ringkörper in der gleichen Hitze durch Warmwalzen zu Rohlingen mit vorgegebenen Walzmaßen umgeformt und abschließend durch eine mechanische Kaltbearbei¬ tung auf die Endabmessungen der Schienenräder beziehungsweise Schienenradteile gebracht werden, dadurch gekennzeichnet, daß ausscheidungshärtbare ferritisch-perlitische Stähle beste¬ hend aus (in Masse %)1. • Process for the production of rail wheels and rail wheel parts from steel blocks, which are forged at about 1300 ° C. and, after forging, are hot-formed by upsetting and punching to form ring bodies, whereupon the ring bodies are hot-rolled into blanks with the same heat predetermined rolling dimensions and finally brought to the final dimensions of the rail wheels or rail wheel parts by mechanical cold machining, characterized in that precipitation-hardenable ferritic-pearlitic steels consist of (in mass%)
C 0,25 bis 0,40C 0.25 to 0.40
Si 0,40 bis 0,90Si 0.40 to 0.90
Mn 1,2 bis 1,6Mn 1.2 to 1.6
P maximal 0,015 s maximal 0,015P maximum 0.015 s maximum 0.015
AI maximal 0,03AI maximum 0.03
N 0,01 bis 0,03N 0.01 to 0.03
Cr 0,10 bis 0,50Cr 0.10 to 0.50
Ni maximal 0,15Ni maximum 0.15
Mo 0 bis 0,10Mo 0 to 0.10
V 0,06 bis 0,15V 0.06 to 0.15
Ti 0 bis 0,04Ti 0 to 0.04
Rest Eisen und erschmelzungsbedingte Beimengungen eingesetzt werden, wobei das Warmwalzen der Ringkörper beginnt, nachdem die Temperatur der Ringkörper auf 1050 bis 940 °C gebracht worden ist und nach Abschluß des Walzvorganges der Radreifenrohling so abgekühlt wird, daß der Temperaturabfall von 800 °C auf 600 °C in 7 bis 15 Minuten eintritt und schließlich ohne weitere Wärmebehandlung die Kaltbearbeitung durchgeführt wird.Remainder iron and melting-related admixtures are used, the hot rolling of the ring body begins after the temperature of the ring body has been brought to 1050 to 940 ° C and after completion of the rolling process, the wheel tire blank is cooled so that the temperature drop from 800 ° C to 600 ° C occurs in 7 to 15 minutes and finally the cold working is carried out without further heat treatment.
ERSATZB π (REGEL 26) REPLACEMENT B π (RULE 26)
2. Verfahren nach Anspruch 1, insbesondere zur Herstellung von Radscheiben mit integrierter Radnabe. dadurch gekennzeichnet, daß Stähle eingesetzt werden mit (in Masse %)2. The method according to claim 1, in particular for the production of wheel disks with an integrated wheel hub. characterized in that steels are used with (in mass%)
C 0,26 bis 0,32C 0.26 to 0.32
Si 0,60 bis 0,80Si 0.60 to 0.80
Mn 1,40 bis 1,6Mn 1.40 to 1.6
P maximal 0,01P maximum 0.01
S maximal 0,01S maximum 0.01
AI maximal 0,025AI maximum 0.025
N 0,015 bis 0,025N 0.015 to 0.025
Cr 0,15 bis 0,20Cr 0.15 to 0.20
Ni maximal 0,10Ni maximum 0.10
Mo 0 bis 0,05Mo 0 to 0.05
V 0,08 bis 0,12V 0.08 to 0.12
Ti 0,018 bis 0,03Ti 0.018 to 0.03
Rest Eisen und erschmelzungsbedingte Beimengungen.Remainder iron and melting-related admixtures.
3. Verfahren nach Anspruch 1, insbesondere zur Herstellung von Schienenradteilen, die beim bestimmungsgemäßen Gebrauch3. The method according to claim 1, in particular for the production of rail wheel parts, when used as intended
Schienenkontakt haben, dadurch gekennzeichnet, daß Stähle eingesetzt werden mit (in Masse %)Have rail contact, characterized in that steels are used with (in mass%)
C 0,33 bis 0,37C 0.33 to 0.37
Si 0,60 bis 0,70Si 0.60 to 0.70
Mn 1,30 bis 1,5Mn 1.30 to 1.5
P maximal 0,01 s maximal 0,01P maximum 0.01 s maximum 0.01
AI maximal 0,025AI maximum 0.025
N 0,015 bis 0,025N 0.015 to 0.025
Cr 0,15 bis 0,20Cr 0.15 to 0.20
Ni maximal 0,10Ni maximum 0.10
Mo 0 bis 0,02Mo 0 to 0.02
V 0,08 bis 0,12V 0.08 to 0.12
Ti 0 bis 0,03Ti 0 to 0.03
Rest Eisen und erschmelzungsbedingte Beimengungen . Remainder iron and melting-related admixtures.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Warmwalzen der Ringkörper beginnt, nachdem die Tempera¬ tur der Ringkörper auf etwa 950 °C gebracht worden ist, wobei das Warmwalzen mit negativer Energiebilanz aus Umformwärme und Wärmeentzug derart durchgeführt wird, daß sich eine im Bereich von 900 °C liegende Endwalztemperatur einstellt.4. The method according to any one of claims 1 to 3, characterized in that the hot rolling of the ring body begins after the temperature of the ring body has been brought to about 950 ° C, the hot rolling being carried out with a negative energy balance from the heat of deformation and heat removal that a final rolling temperature is in the range of 900 ° C.
ERSATZBUTT(REGEL26) REPLACEMENT BUTT (RULE 26)
PCT/EP1994/004116 1993-12-21 1994-12-10 Process for producing rail wheels and parts thereof WO1995017529A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934343565 DE4343565C1 (en) 1993-12-21 1993-12-21 Method for producing rail wheels and rail wheel parts
DEP4343565.3 1993-12-21

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WO1995017529A1 true WO1995017529A1 (en) 1995-06-29

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CN111560562A (en) * 2020-05-25 2020-08-21 宝武集团马钢轨交材料科技有限公司 Medium carbon steel wheel containing Cr and Mo and heat treatment method thereof
CN114855082A (en) * 2022-04-26 2022-08-05 包头钢铁（集团）有限责任公司 Manufacturing method for improving low-temperature toughness of hot-rolled U75V steel rail by rare earth elements

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CN103695778B (en) * 2013-12-24 2016-01-27 攀枝花攀煤矿山机械制造有限公司 Preparation technology for chain wheel of heavy scraper conveyor
CN106834652A (en) * 2017-03-08 2017-06-13 杭州科技职业技术学院 A kind of automotive wheel heat treatment system
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CN114855082A (en) * 2022-04-26 2022-08-05 包头钢铁（集团）有限责任公司 Manufacturing method for improving low-temperature toughness of hot-rolled U75V steel rail by rare earth elements
CN114855082B (en) * 2022-04-26 2023-06-20 包头钢铁（集团）有限责任公司 Manufacturing method for improving low-temperature toughness of hot-rolled U75V steel rail by rare earth elements

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