WO2021037567A1 - Serpentin, pince d'amarrage formée à partir de ce dernier et procédé de production d'un tel serpentin - Google Patents

Serpentin, pince d'amarrage formée à partir de ce dernier et procédé de production d'un tel serpentin Download PDF

Info

Publication number
WO2021037567A1
WO2021037567A1 PCT/EP2020/072650 EP2020072650W WO2021037567A1 WO 2021037567 A1 WO2021037567 A1 WO 2021037567A1 EP 2020072650 W EP2020072650 W EP 2020072650W WO 2021037567 A1 WO2021037567 A1 WO 2021037567A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring wire
weight
content
steel
spring
Prior art date
Application number
PCT/EP2020/072650
Other languages
German (de)
English (en)
Inventor
Lei HU
Dennis Wolf
Original Assignee
Vossloh Fastening Systems 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 Vossloh Fastening Systems Gmbh filed Critical Vossloh Fastening Systems Gmbh
Priority to CN202080059418.3A priority Critical patent/CN114341387B/zh
Priority to US17/636,964 priority patent/US20220275490A1/en
Publication of WO2021037567A1 publication Critical patent/WO2021037567A1/fr

Links

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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • 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
    • C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • 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")
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/02—Hardening by precipitation

Definitions

  • the invention relates to a spring wire made from a spring steel with a carbon content of 0.35-0.42% by weight.
  • the invention relates to a tension clamp for holding down a rail for rail vehicles in a rail fastening point, which is formed from such a spring wire, and a method for producing a spring wire of the type in question here.
  • the rail to be fastened is fastened to the subsurface that supports the track to which the rail belongs.
  • the subsurface can be formed by a conventional sleeper made of wood or by sleepers or plates that are formed from a concrete or a plastic material.
  • the rail fastening point typically comprises at least one guide plate, which rests laterally on the rail and, during use, transfers the transverse forces acting on the rail into the ground, and a tension clamp which is braced against the ground against the tension clamps. With the end of at least one spring arm, the tension clamp exerts an elastically resilient hold-down force on the rail foot, by means of which the rail is held pressed against the ground.
  • the hold-down forces can be applied particularly effectively by means of W- or W-shaped tension clamps, which act on the rail foot with the free ends of their two spring arms.
  • tension clamps of this type are the products explained under URL https://www.vossloh.com/de/ effort-und-loesungen / . . .finder / (found on August 12, 2019).
  • the spring wires that are required to produce tension clamps typically have a circular diameter of 9-15 mm.
  • the individual sections of a tension clamp are either predominantly subjected to bending or torsion loads, with more or less strong proportions of the other form of load being added to the dominant load in each case.
  • the usual manufacturing route for their production includes the steps of “casting molten steel into bars”, “heating the bars through” and “hot rolling the bars to form a spring wire”, “cooling the hot-rolled spring wire” and depositing or winding the spring wire into a coil ", whereby the hot rolling is usually carried out in several steps, which include rolling, intermediate rolling and finish rolling of the slab to form the spring wire.
  • the work steps to be carried out and the influencing variables to be observed are known to the person skilled in the art (see, for example, Stahl Fibel, 2015, Verlag Stahleisen GmbH, Düsseldorf, ISBN 978-3-514-00815-1).
  • the tension clamps are cold-formed from the spring wires produced in this way.
  • rods are cut to length from the spring wires, which are then usually bent in several steps to form the tension clamp. In this way it is possible to produce tension clamps with a complex shape.
  • the tension clamps obtained are then subjected to a heat treatment in which they are heated to a temperature above Ac3 and then quenched in order to optimize their mechanical properties by hardening.
  • the aim is to set high tensile strengths Rm and high yield strengths Rp0.2.
  • a ratio of Rm / Rp0.2 of «1 is aimed for in order to be able to apply high resilient hold-down forces with the tension clamps on the one hand and to be able to Extend the range of elastic deformability of the tension clamp and the associated fatigue strength to a maximum.
  • the tensile strengths Rm and elongation limits Rp0.2 for tension clamps of the type in question are in the range of 1200-1400 MPa.
  • thermomechanical rolling In addition to the alloying measures, the mechanical properties of a spring wire provided for the production of spring elements can also be improved by so-called “thermomechanical rolling”.
  • thermomechanical rolling aimed particularly at spring wire, which is intended for the production of flexurally loaded springs, the spring wire is hot-rolled in a temperature range in which its structure has not yet fully recrystallized, but which is above the Ar3 temperature of the steel. In this way, spring wires with a particularly fine structure can be produced, which contributes to a high strength and an optimized spring behavior of the tension clamp (DE 19546204 C1).
  • thermomechanical forming in particular on the treatment of spring wire which is intended for the production of torsion-loaded springs, the rod-shaped starting material is heated to a temperature above at a rate of at least 50 K / s The recrystallization temperature is heated and then reshaped at a temperature at which a dynamic and / or static recrystallization of the austenite results.
  • the austenite of the formed product recrystallized in this way is quenched and tempered (DE 19839383 A1).
  • the spring steel described in CN 105 112774 A should also be mentioned, which can be hardened by air cooling and is said to have high deformability with a comparatively low content of carbon and microalloy elements.
  • this well-known spring steel consists of, in% by weight, 0.15 - 0.50%
  • the steel assembled in this way has been heated to 900 - 1050 ° C and kept at this temperature, it is given a structure through controlled cooling, the main components of which are bainite and martensite and which can also contain smaller amounts of retained austenite.
  • the properties of the steel can be further improved by tempering at low temperatures.
  • the steel treated in this way should have a tensile strength Rm of at least 1350 MPa, a yield point Rp0.2 of at least 1050 MPa and an elongation A of at least 10%.
  • a spring wire which achieves this object has at least the features specified in claim 1.
  • a tension clamp with optimized properties and a method should be specified that enables the practice-oriented production of spring wires according to the invention.
  • a tension clamp for holding down rails for rail vehicles in a rail fastening point which solves this problem, is formed from a spring wire provided according to the invention.
  • a method that achieves the above object comprises, according to the invention, at least the work steps and features specified in claim 14. It goes without saying that when carrying out the method according to the invention, the person skilled in the art not only completes the method steps mentioned in the claims and explained in detail here, but also carries out all other steps and activities that are necessary in the practical implementation of such methods in the prior art Technique should be carried out regularly if the need arises.
  • a spring wire according to the invention is accordingly produced from a steel which, in% by weight,
  • V 0.020-0.10%
  • AI £ 0.03%, and the remainder consists of iron and unavoidable impurities, the content of the sum of impurities being limited to a maximum of 0.2% and including up to 0.025% P and up to 0.025% S among the impurities.
  • the alloy concept provided for the spring wire according to the invention is based on the fact that the tensile strength Rm and the yield strength Rp0.2 are increased by adding additional alloying elements. This makes it possible to keep the carbon content and the associated cold deformability of the spring wire at an optimally low level for practical processing, while at the same time increasing the strength Rm and yield strength Rp0.2 significantly compared to the prior art.
  • the individual alloy components and their contents in the alloy of a spring wire according to the invention have been determined as follows:
  • Carbon (“C”) is present in the spring steel of a spring wire according to the invention in contents of 0.35-0.42% by weight in order to have good deformability, high toughness, good corrosion resistance and low sensitivity to stress- or hydrogen-induced cracking to ensure.
  • C contents of at most 0.40% by weight, in particular less than 0.40% by weight, have proven particularly useful in terms of optimized ductility and the associated optimized deformability at room temperature.
  • Si Silicon
  • the Si content is limited to 1.8% by weight.
  • Manganese (“Mn”) is present in the steel of a spring wire according to the invention in contents of 0.5-0.8% by weight in order to ensure that the spring steel can be sufficiently hardened.
  • Mn binds the sulfur, which is usually unavoidable in steel, to form MnS and thus prevents its harmful effect.
  • This requires at least 0.5% by weight, in particular at least 0.50% by weight, of Mn in the steel, with an optimized effect being achieved with contents of at least 0.6% by weight, in particular at least 0.60% by weight. -% or at least 0.7% by weight, adjusts.
  • Excessively high Mn contents would, however, worsen the brittle-ductile transition temperature (Ductile-Brittle temperature "DBTT”), therefore the Mn content is at most 0.8% by weight, in particular 0.80% by weight, limited.
  • DBTT brittle-ductile transition temperature
  • Chromium (“Cr”) is present in the spring steel of a spring wire according to the invention in contents of 0.05-0.25% in order to further improve the hardenability of the steel.
  • the presence of Cr in the steel according to the invention ensures that the structure of a tension clamp formed from a spring wire according to the invention consists of more than 95 area% of martensite after hardening.
  • a C content of at least 0.05% by weight can reduce the carbon activity and the risk of surface layer decarburization during the heat treatment.
  • the positive effects of Cr in the spring steel of a spring wire according to the invention can be used particularly reliably if a Cr content of at least 0.1% by weight, in particular at least 0.10% by weight or in particular at least 0.18% by weight. -%, is provided.
  • Niobium (“Nb”) is of particular importance for the invention and is present in the spring steel of a spring wire according to the invention in contents of 0.02-0.1% by weight. Nb delays the recrystallization during a thermomechanical rolling carried out in the temperature range of the recrystallization stop temperature-Ar3 temperature of the spring steel, by means of which a particularly fine-grain structure of the spring wire according to the invention is obtained. At the same time, the presence of Nb limits the grain growth if the spring wire according to the invention is heated to the austenitizing temperature and held there during the heat treatment of the tension clamp formed from it.
  • the Nb content of the spring steel of a spring wire according to the invention can be at least 0.0250% by weight, at least 0.0280% by weight or at least 0.030% by weight. Nb can be used particularly effectively at contents of up to 0.070% by weight, in particular up to 0.050% by weight.
  • Vanadium is present in the spring steel of a spring wire according to the invention in contents of 0.020-0.10% by weight.
  • V forms carbides and nitrides with carbon and nitrogen, which are typically fine, for example 8-12 nm, in particular about 10 nm, large carbonitride precipitates are present and, through precipitation hardening, significantly to increase the strength contribute a spring wire according to the invention.
  • V in this way contributes to the relaxation resistance of the spring steel from which a spring wire according to the invention is made.
  • the V content of the spring steel of a spring wire according to the invention can be at least 0.0250% by weight, at least 0.0280% by weight or at least 0.030% by weight.
  • V can be used particularly effectively at contents of up to 0.070% by weight, in particular up to 0.060% by weight.
  • Nb and V according to the invention results in high tensile strengths Rm and, as a rule, approximately the same elongation limits Rp0.2, so that in a tension clamp made from spring wire according to the invention the ratio Rm / Rp0.2 is regularly in the range that is optimal for its service life and spring behavior from 1 to 1.2.
  • N Nitrogen
  • contents of 0.0040-0.0120% by weight (40-120 ppm) in order to enable the formation of vanadium nitrides or vanadium carbonitrides.
  • Excessively high N contents would, however, promote the stretching aging of the spring wire according to the invention, which would be diametrically opposed to the toughness of the spring wire according to the invention and the fatigue strength required by a tension clamp.
  • Negative effects of the presence of N in the spring steel of a spring wire according to the invention can be excluded particularly reliably by limiting the N content to a maximum of 0.0100% by weight (100 ppm).
  • a spring wire composed of a spring steel composed in the manner according to the invention achieves in the hot-rolled condition a tensile test according to DIN EN ISO 6892-1 of at least 55% at break and is therefore regularly higher than the break at break that can be determined for spring wires from a conventionally alloyed 38Si7 steel.
  • DIN EN ISO 6892-1 of at least 55% at break and is therefore regularly higher than the break at break that can be determined for spring wires from a conventionally alloyed 38Si7 steel.
  • ASTM 10 fine-grain structure of at least ASTM 10
  • ASTM E112 This fineness of the structure is largely retained through the cold forming of the spring wire into a tension clamp and the subsequent heat treatment of the tension clamp.
  • tension clamps according to the invention ready for installation in a rail fastening point, regularly have a fineness of their structure which, determined according to ASTM E112, corresponds to at least ASTM 8. This corresponds to an improvement in the fine grain size by at least one of the grain size classes specified in ASTM E112 compared to a tension clamp that is bent from a spring wire made from conventional 38Si7 steel.
  • the method according to the invention for producing a spring wire according to the invention comprises the following work steps: a) Melting a steel made from, in% by weight, C: 0.35-0.42%, Si:
  • Mn 0.50-0.80%
  • Cr 0.05-0.25%
  • Nb 0.020-0.10%
  • V 0.020 - 0.10%
  • N 0.0040 - 0.0120%
  • AI £ 0.03%
  • the remainder consists of iron and unavoidable impurities, the content of the total of impurities being limited to a maximum of 0.2% is limited and the impurities include up to 0.025% P and up to 0.025% S
  • cooling the thermomechanically finished hot-rolled spring wire at a cooling rate of 1 - 5 ° C / s to a winding temperature of 550 - 650 ° C
  • the spring wire is thus subjected to a thermomechanical rolling step in the course of hot rolling, in which it is rolled at temperatures which are rolled below the recrystallization stop temperature and above the Ar3 temperature of the steel.
  • the “recrystallization stop temperature” is the temperature at which the spring wire has cooled down to such an extent that its previously austenitic structure no longer recrystallizes. Due to the thermomechanical rolling carried out in the temperature range specified according to the invention in combination with the alloy selected according to the invention, in particular due to the simultaneous presence of Nb and V, the particularly fine-grain structure is obtained, which characterizes a spring wire according to the invention in the hot-rolled state.
  • the cooling of the hot-rolled spring wire at the cooling speeds specified according to the invention and compliance with the winding temperatures of 550-650 ° C prescribed according to the invention ensure that a maximum hardness of the spring wire according to the invention is achieved as a result of precipitation hardening.
  • the “thermomechanical rolling” sub-step in a separate operation. to be carried out, which is carried out after the actual hot rolling of the spring wire.
  • the then hot-rolled spring wire provided is first opened Austenitizing temperature, then cooled to a temperature below the recrystallization stop temperature but above the Ar3 temperature of the spring steel and hot-rolled at this temperature with a sufficient degree of deformation. This is followed by the cooling and the laying down or winding of the spring wire as indicated in steps d) and e) of the method according to the invention.
  • a technologically and economically optimized variant of the method according to the invention provides that all partial steps of hot rolling (work step c)) are completed in a continuous cycle, that is, a thermomechanically finished hot-rolled spring wire is present when the spring wire leaves the hot-rolling section used in each case.
  • a comparative melt V1 was melted, the C, Si, Mn, P, S and N contents of which corresponded to the requirements applicable to the known 38Si7 steel, but which also had an effective content of Cr.
  • the composition of the comparative melt V1 is also given in Table 1.
  • the recrystallization stop temperature of the respective spring steel from which the respective spring wire E1-E5.V1 is produced can be determined experimentally in a manner known per se or can be estimated with the aid of empirically determined formulas.
  • the Ar3 and Ar1 temperatures of the respective spring steel from which the respective spring wire E1-E5, V1 is produced can be determined experimentally in a manner known per se, for example by means of dilatometry in a thermomechanical simulator.
  • the hot-rolled spring wires obtained were cooled at a cooling rate of 1-5 ° C./s to a winding temperature of 550-650 ° C., at which they were wound into a coil.
  • the spring wires in the coil were then cooled to room temperature.
  • ASTM E112 the grain size "ASTM_F” of the structure and according to DIN EN ISO 6892-1 the fracture necking "Z_F” was determined on the hot-rolled spring wires obtained.
  • the obtained values "ASTM_F” and “Z_F” are given in table 2 for the spring wires made of steels E1 - E5 and V1.
  • the tension clamps After quenching, the tension clamps have undergone a tempering process in which they are heated to a tempering temperature of 400-450 ° C over a period of 60-120 minutes and held there. The tension clamps, which had been tempered in this way, were then cooled to room temperature in air.
  • the tensile strength Rm and the yield strength Rp0.2 were determined in accordance with DIN EN ISO 6892-1.
  • DIN EN ISO 148-1 the notched impact energy KV-20 has been determined as a characteristic value for toughness.
  • the measured values obtained are listed in Table 2. It was found that not only the tensile strength Rm and the yield strength Rp0.2 of the tension clamps produced from spring steel E1 composed according to the invention in the manner according to the invention could be significantly increased with unchanged impact work KV-20 compared to the tension clamps made from the comparative steel V1, but that the ratio Rm / Rp0.2 has also remained practically the same.
  • the tension clamps produced from the spring steels E1-E5 according to the invention had a significantly better fine-grain “ASTM” structure, determined in accordance with ASTM E112, than the tension clamps made from the comparative steel V1.

Abstract

L'invention concerne un serpentin qui peut être efficacement formé à froid même à un diamètre d'au moins 9 mm et présente néanmoins des propriétés mécaniques améliorées. À cet effet, l'invention porte sur un serpentin, en acier qui, en % en poids, est constitué de 0,35 à 0,42 % de C, de 1,5 à 1,8 % de Si, de 0,5 à 0,8 % de Mn, de 0,05 à 0,25 % de Cr, de 0,020 à 0,10 % de Nb, de 0,020 à 0,10 % de V, de 0,0040 à 0,0120 % de N, de < 0,03 % d'Al, et le reste étant constitué de fer et d'impuretés inévitables, la quantité de la somme des impuretés étant limitée tout au plus à 0,2 % et les impuretés comprenant jusqu'à 0,025 % de P et jusqu'à 0,025 % de S. Le serpentin, selon l'invention, est notamment approprié pour produire une pince d'amarrage ayant des propriétés d'utilisation optimisées. L'invention concerne également un procédé permettant à des serpentin, selon l'invention, d'être produits de manière pratique.
PCT/EP2020/072650 2019-08-23 2020-08-12 Serpentin, pince d'amarrage formée à partir de ce dernier et procédé de production d'un tel serpentin WO2021037567A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202080059418.3A CN114341387B (zh) 2019-08-23 2020-08-12 张力夹以及生产这种张力夹的方法
US17/636,964 US20220275490A1 (en) 2019-08-23 2020-08-12 Spring Wire, Tension Clamp Formed Therefrom and Method for Manufacturing Such a Spring Wire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19193224.3A EP3783120B1 (fr) 2019-08-23 2019-08-23 Fil de ressort, pince de serrage formée à partir dudit fil de ressort et procédé de fabrication d'un tel fil de ressort
EP19193224.3 2019-08-23

Publications (1)

Publication Number Publication Date
WO2021037567A1 true WO2021037567A1 (fr) 2021-03-04

Family

ID=67742174

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/072650 WO2021037567A1 (fr) 2019-08-23 2020-08-12 Serpentin, pince d'amarrage formée à partir de ce dernier et procédé de production d'un tel serpentin

Country Status (7)

Country Link
US (1) US20220275490A1 (fr)
EP (1) EP3783120B1 (fr)
CN (1) CN114341387B (fr)
ES (1) ES2963989T3 (fr)
FI (1) FI3783120T3 (fr)
PL (1) PL3783120T3 (fr)
WO (1) WO2021037567A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19546204C1 (de) 1995-12-11 1997-03-20 Max Planck Inst Eisenforschung Verfahren zur Herstellung von hochfesten Gegenständen aus einem Vergütungsstahl und Anwendung dieses Verfahrens zur Erzeugung von Federn
EP0974676A2 (fr) * 1998-07-20 2000-01-26 Firma Muhr und Bender Procédé de traitement thermomécanique d'acier pour éléments de ressort de torsion
DE19839383A1 (de) 1998-07-20 2000-01-27 Muhr & Bender Verfahren zur thermomechanischen Behandlung von Stahl für torsionsbeanspruchte Federelemente
EP2612941A1 (fr) * 2010-08-30 2013-07-10 Kabushiki Kaisha Kobe Seiko Sho Matériau de fil d'acier pour ressort à haute résistance qui a d'excellentes propriétés de tréfilage et son procédé de fabrication, et ressort à haute résistance
CN102719759B (zh) * 2012-07-12 2014-03-26 南车戚墅堰机车车辆工艺研究所有限公司 高速铁路扣件用弹条用钢及其冶炼生产方法
RU2512695C1 (ru) * 2012-12-26 2014-04-10 Общество с ограниченной ответственностью "Мультимодальный центр МИИТ" Способ изготовления упругой клеммы для рельсового скрепления и упругая клемма
CN105112774A (zh) 2015-08-28 2015-12-02 浙江美力科技股份有限公司 高强韧性低中碳微合金风冷硬化弹簧钢及其成形和热处理工艺
CN105401072A (zh) * 2015-12-18 2016-03-16 马鞍山钢铁股份有限公司 含铌12.9级轨道交通移动装备用紧固件用钢及其热处理工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01116031A (ja) * 1987-10-29 1989-05-09 Nippon Steel Corp 靭性に優れた高Ｓｉ高炭素熱延鋼板の製造方法
JP2932943B2 (ja) * 1993-11-04 1999-08-09 株式会社神戸製鋼所 高耐食性高強度ばね用鋼材
JP2001049337A (ja) * 1999-08-05 2001-02-20 Kobe Steel Ltd 疲労強度に優れた高強度ばねの製造方法
DE602004026995D1 (de) * 2003-01-27 2010-06-17 Nippon Steel Corp Walzdraht aus hochfestem hochzähem kohlenstoffreichem stahl und herstellungsverfahren dafür
JP4393467B2 (ja) * 2006-02-28 2010-01-06 株式会社神戸製鋼所 強伸線加工用の熱間圧延線材およびその製造方法
CN101716721B (zh) * 2009-12-23 2011-12-07 南京钢铁股份有限公司 一种弹簧钢盘条的生产工艺
JP5250609B2 (ja) * 2010-11-11 2013-07-31 日本発條株式会社 高強度ばね用鋼、高強度ばねの製造方法及び高強度ばね
CN109082592B (zh) * 2018-08-27 2020-08-18 河钢股份有限公司 一种综合性能良好耐腐蚀弹簧钢热轧盘条及其生产工艺
CN109735765B (zh) * 2019-01-17 2020-05-05 江苏利淮钢铁有限公司 一种大规格、超细晶、高强韧性弹簧钢及其生产方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19546204C1 (de) 1995-12-11 1997-03-20 Max Planck Inst Eisenforschung Verfahren zur Herstellung von hochfesten Gegenständen aus einem Vergütungsstahl und Anwendung dieses Verfahrens zur Erzeugung von Federn
EP0974676A2 (fr) * 1998-07-20 2000-01-26 Firma Muhr und Bender Procédé de traitement thermomécanique d'acier pour éléments de ressort de torsion
DE19839383A1 (de) 1998-07-20 2000-01-27 Muhr & Bender Verfahren zur thermomechanischen Behandlung von Stahl für torsionsbeanspruchte Federelemente
EP2612941A1 (fr) * 2010-08-30 2013-07-10 Kabushiki Kaisha Kobe Seiko Sho Matériau de fil d'acier pour ressort à haute résistance qui a d'excellentes propriétés de tréfilage et son procédé de fabrication, et ressort à haute résistance
CN102719759B (zh) * 2012-07-12 2014-03-26 南车戚墅堰机车车辆工艺研究所有限公司 高速铁路扣件用弹条用钢及其冶炼生产方法
RU2512695C1 (ru) * 2012-12-26 2014-04-10 Общество с ограниченной ответственностью "Мультимодальный центр МИИТ" Способ изготовления упругой клеммы для рельсового скрепления и упругая клемма
CN105112774A (zh) 2015-08-28 2015-12-02 浙江美力科技股份有限公司 高强韧性低中碳微合金风冷硬化弹簧钢及其成形和热处理工艺
CN105401072A (zh) * 2015-12-18 2016-03-16 马鞍山钢铁股份有限公司 含铌12.9级轨道交通移动装备用紧固件用钢及其热处理工艺

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Stahl Fibel", 2015, VERLAG STAHLEISEN GMBH
DATABASE WPI Week 201624, Derwent World Patents Index; AN 2016-17839W, XP002797798 *

Also Published As

Publication number Publication date
EP3783120B1 (fr) 2023-09-27
CN114341387B (zh) 2023-06-23
FI3783120T3 (fi) 2023-11-15
ES2963989T3 (es) 2024-04-03
CN114341387A (zh) 2022-04-12
US20220275490A1 (en) 2022-09-01
EP3783120A1 (fr) 2021-02-24
PL3783120T3 (pl) 2024-02-19

Similar Documents

Publication Publication Date Title
EP1200635B1 (fr) Feuille ou tole d&#39;acier tres resistante et procede de fabrication de ladite feuille ou tole
DE4040355C2 (de) Verfahren zur Herstellung eines dünnen Stahlblechs aus Stahl mit hohem Kohlenstoffgehalt
EP3535431B1 (fr) Produit d&#39;acier à teneur en manganèse intermédiaire pour application à basse température et son procédé de fabrication
EP3504349B1 (fr) Procédé de fabrication d&#39;une bande d&#39;acier à résistance très élevée présentant des propriétés améliorées lors du traitement ultérieur et une telle bande d&#39;acier
DE19610675C1 (de) Mehrphasenstahl und Verfahren zu seiner Herstellung
EP2690184B1 (fr) Cold rolled steel flat product and method for its production
EP3305935A1 (fr) Produit plat en acier haute résistance et l&#39;usage d&#39;un produit plat en acier haute résistance
DE60300561T3 (de) Verfahren zur Herstellung eines warmgewalzten Stahlbandes
EP2297367A1 (fr) Procédé de production d&#39;une pièce moulée en acier à structure à prédominance ferritique-bainitique
EP3724359B1 (fr) Produit plat en acier laminé à chaud, à rigidité élevée, doté d&#39;une résistance à la fissuration de bords élevée ainsi que d&#39;une capacité de durcissement à la cuisson élevée et procédé de fabrication d&#39;un tel produit plat en acier
DE102015112886A1 (de) Hochfester aluminiumhaltiger Manganstahl, ein Verfahren zur Herstellung eines Stahlflachprodukts aus diesem Stahl und hiernach hergestelltes Stahlflachprodukt
EP3512968B1 (fr) Procédé pour fabriquer un produit plat en acier à partir d&#39;un acier au manganèse et produit plat en acier résultant
EP1319725B1 (fr) Procédé pour la fabrication d&#39;une bande à chaud
EP1052296B1 (fr) Utilisation d&#39;un acier pour la fabrication de plaques de blindage
DE60011666T2 (de) Verfahren zur herstellung von ultrafeiner kornstruktur für unlegierte oder niedriglegierte stähle
WO2016020519A1 (fr) Produits semi-finis à haute résistance et en même temps durs, et composants en acier fortement allié, leur procédé de fabrication et utilisation
EP3551776A1 (fr) Procédé de fabrication d&#39;une bande laminée à chaud ou à froid et/ou d&#39;un produit plat en acier laminé de manière flexible constitué par un acier contenant du manganèse, hautement solide et produit plat en acier ainsi obtenu
WO2020038883A1 (fr) Produit plat en acier laminé à chaud n&#39;ayant pas subi un traitement par trempe et revenu, laminé à chaud ayant subi un traitement par trempe et revenu, ainsi que procédé de production associé
EP3783120B1 (fr) Fil de ressort, pince de serrage formée à partir dudit fil de ressort et procédé de fabrication d&#39;un tel fil de ressort
DE102016115618A1 (de) Verfahren zur Herstellung eines höchstfesten Stahlbandes mit verbesserten Eigenschaften bei der Weiterverarbeitung und ein derartiges Stahlband
EP3469108A1 (fr) Procédé de fabrication d&#39;une bande d&#39;acier laminée à froid présentant des propriétés trip à partir d&#39;un acier à résistance élevée contenant du manganèse
WO2017157793A1 (fr) Pièces élastiques faites d&#39;un alliage d&#39;acier et procédé de réalisation
DE19528671C1 (de) Verwendung eines niedriglegierten hochfesten Feinkornbaustahls für Streckenausbauprofile für Grubenbetriebe und Verfahren zu seiner Herstellung
WO2024068957A1 (fr) Procédé de fabrication d&#39;une bande d&#39;acier à partir d&#39;un acier multiphase à haute résistance et bande d&#39;acier correspondante
DE102022102418A1 (de) Hochfestes schmelztauchbeschichtetes Stahlband mit durch Gefügeumwandlung bewirkter Plastizität und Verfahren zu dessen Herstellung

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20756843

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20756843

Country of ref document: EP

Kind code of ref document: A1