WO2006103021A2 - Bague de roulement soudee en acier de roulement - Google Patents

Bague de roulement soudee en acier de roulement Download PDF

Info

Publication number
WO2006103021A2
WO2006103021A2 PCT/EP2006/002697 EP2006002697W WO2006103021A2 WO 2006103021 A2 WO2006103021 A2 WO 2006103021A2 EP 2006002697 W EP2006002697 W EP 2006002697W WO 2006103021 A2 WO2006103021 A2 WO 2006103021A2
Authority
WO
WIPO (PCT)
Prior art keywords
weld
bearing ring
rolling bearing
welding
temperature
Prior art date
Application number
PCT/EP2006/002697
Other languages
German (de)
English (en)
Other versions
WO2006103021A3 (fr
Inventor
Karl-Ludwig Grell
Horst DÖPPLING
Horst Arnet
Thomas Müller
Original Assignee
Schaeffler Kg
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 Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2006103021A2 publication Critical patent/WO2006103021A2/fr
Publication of WO2006103021A3 publication Critical patent/WO2006103021A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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
    • C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
    • 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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • F16C2226/36—Material joints by welding

Definitions

  • the invention relates to a welded rolling bearing ring made of a bearing steel.
  • radial roller bearing rings ie of inner and outer rings of ball bearings, needle bearings, roller bearings or the like
  • machining the roller bearing steel in the soft annealed microstructure state In this state, spherical cementite is present in the ferritic matrix.
  • the rings consist of a non-interrupted microstructure state of the production process, such as rolling, forging or extrusion, in the linearity, transverse and longitudinal to the main axis of the part. After machining, it is hardened and tempered, followed by finishing by grinding or honing.
  • z. B. welded axial ball raceways with a material with about 0.45% carbon can be produced by resistance butt welding or a similar method, but the weld is the weak point of such tracks after there the fiber direction, so the microstructure, which is introduced by the manufacturing process, ie during the rolling of the strip material, is interrupted.
  • such welded raceways only limited loads interchangeable, it can be produced only axial bearings, since there always carry a large number of rolling elements loads simultaneously.
  • High load bearing roller bearing raceways in joined design with corresponding service life factors for the static and dynamic loading case are not known. Although it is z. B. from DE 1 552 104 known to weld rings made of profile band. There it is described that in order to avoid stress cracks, the entire component is brought to a temperature above the Martensitstartline before joining. Subsequently, the welding process takes place. However, nothing is described there about the type of material used, nor is it how the material conditions in the region of the weld seam after welding must be in order to be able to ensure sufficient loading capacity.
  • the invention is therefore based on the problem to provide a rolling bearing ring, which is welded and despite all good load capacity, ie in which the weld has no effect on the mechanical properties, and to provide a corresponding manufacturing process for this.
  • a welded rolling bearing ring is provided to be made of a cold-rolled profile wire made of a bearing steel having a hypereutectoid composition having a carbon content of at least 0.7% and a soft-annealed coarse nodular cementite structure by butt-welding with compression deformation, and a weld in the region of the weld has finer-grained martensitic Zementitge Suite für with higher carbide number compared to the rest of the ring area.
  • Fundamental is the realization that in the area of a weld basically superheat structures arise, which lead to coarse-needle martensite or Widmann Toon structures.
  • a cold-rolled profile wire made of a rolling bearing steel having a super-eutectic composition which preferably contains alloying components such as manganese, chromium or silicon of at least 1%, is now used to produce a rolling bearing ring.
  • Targeted temperature profiling and material displacement as well as seam preparation of the joining processes influence the carbide structure and fiber orientation in the joining area in such a way that a nearly homogeneous seam is formed in the sense of an optimized roll over resistance.
  • the central starting point for this is that the profile wire is annealed and, as a result of soft annealing, has a coarse-grained but spherical cementite structure.
  • the surface is decarbonization-free, the spherical cementite structure, sometimes called GKZ structure, has a carbide number of 150 - 350 carbides / 400 microns 2 . So there is a correspondingly coarse Weichglühtpatented with spherical carbides before.
  • This soft annealing structure produced in this way is a prerequisite for establishing a microstructure and conditions in the region of the weld in the context of the subsequent welding process, which ensures a hardness profile over the weld cross section, which also allows higher stresses, and in particular the fiber profile is largely undisturbed despite welding.
  • the soft annealed profile wire thus produced is given for welding in a so-called stamped and bent welding machine.
  • the rings are cold-rolled and, for example, resistance-butt-welded or brake-butt-welded, combined with a compression deformation.
  • the seam preparation means an approximately 5 - 15 ° oblique punching tear to the vertical angular position of the welding surfaces, so that the fiber direction in the ring is deflected inwards towards the core.
  • the bearing steel which preferably contains chromium of at least 0.5%, manganese of at least 0.4%, and aluminum of 0.01-0.03% (thus guaranteeing a fine grain during welding)
  • the structure thus consists of a partially liquid austenite with dissolved carbon interspersed with primary and secondary carbides.
  • the rolling bearing ring according to the invention in the region of the weld thus shows a fine-grained carbide structure and a fine austenite grain, generated by the forming energy, which contributes to the increased nuclei number and thus to fine crystal formation, as well as a little vaulted fiber orientation in the core direction.
  • the other ring area retains its original GKZ structure, which is significantly coarser with respect to the weld area and has a lower carbide number.
  • the joint which has a finer cementite structure as a result of the corresponding treatment, exhibits a hardness at least equal to that of the other ring region, but as a rule the hardness is somewhat higher, owing to the finest carbide formation and the high carbide number in the weld region to the residual cross-section with a lower carbide number and consequently fewer carbides per unit area.
  • the material-technical differences due to the interruption of the homogeneous fiber orientation in the weld area, are thereby compensated advantageous.
  • the hardness in the rolling bearing ring is generally at least 58 HRC, it is greater in the seam area due to the finer cementite structure 1 - 2 HRC.
  • the invention further relates to a method for producing a welded rolling bearing ring in which a cold-rolled profile bar is joined from a bearing steel with hypereutectoid composition having a carbon content of at least 0.7% and a soft annealed coarse nodular cementite structure by butt welding with compression deformation, so that a martensitic cementite microstructure having a higher carbide number is formed in the weld area in comparison with the rest of the ring area.
  • the decisive factor is the use of a bearing steel with a Weichglühgeglage with spherical Zemen- tit, which allows the subsequent machinability to remove the Sch relieaufschs, and the corresponding temperature control and treatment during the welding process, so that the carbides excreted as described extremely fine and the Adjust differences in cementite structure between weld area and other ring area.
  • the temperature is controlled so that the widest possible volume of material is detected, at least the range of a simple wall thickness should be sufficiently tempered to reach the mild local temperature differences and thus low voltage gradients.
  • the profile wire is resistance or Abf b remsstu mpf welded.
  • the profile wire is heated at the welding surfaces to a temperature above the solidus temperature and after joining and upsetting a controlled cooling to a temperature between 750 - 550 0 C made, after which a further cooling to a temperature below 500 ° C. connected to a due to the spherical present cementite simple machining of the weld to remove the weld bead formed by upsetting occurs.
  • the welding process itself is preferably carried out at a temperature between 1,400 0 C and 1,600 0 C.
  • the cooling rate after welding should be between 100 ° - 150 0 C per second.
  • the welding surfaces have an oblique punching tear of 5 ° - 15 ° to the vertical. As a result, defined conditions are created in the welding area.
  • the ring After the removal of the weld bead so far a finished ring is present, which requires no temperature treatment for structural transformation or the like, as is often required for structural improvement after a machining treatment, the ring can be cured immediately thereafter, the martensitic or bainitic hardening a sufficient guarantees high toughness and hardness of at least 58 HRC and compensates the microstructure conditions in the matrix and in the weld area, since the fine hardness structure in the seam area compensates for the fiber interruption in the coarser martensite with a somewhat higher hardness of approx. 1 - 2 HRC resulting from the high carbide number results.
  • a roller bearing ring according to the invention can also have two or more joints, that is, it is formed from two or more profile wire sections. While in a bent ring with only one weld seam tensile stresses are introduced into the weld structure when the tools are opened from the bending process, and thus promote the risk of crack formation in the cooling phase, the residual stress situation can be improved for a ring composed of several segments and thus significantly reducing the risk of cracks, completely avoid them with the appropriate process control.
  • Fig. 1 is a schematic representation of a section of an unwelded
  • FIG. 2 shows a schematic illustration according to FIG. 1 after the welding and the representation of different temperature profiles
  • FIG. 3 is a micrograph of a rolling bearing ring according to the invention in the region of the weld before curing and tempering,
  • FIG. 4 is a diagram illustrating the measured hardness curve in FIG.
  • FIG. 5 shows a micrograph of a rolling bearing ring produced according to the invention in the area of the weld after hardening and tempering
  • Fig. 6 is a diagram showing the measured hardness profile over the weld.
  • Fig. 1 shows in the form of a schematic representation of a profile wire of a bearing steel, which is a steel according to the invention provided over-eutectoid composition with at least 0.7% carbon and a soft-annealed, coarse-grained spherical cementite.
  • the profile wire 1 is not welded yet. Its welding edges 2 are at an angle of about 5 to 12 ° to the vertical shown in Fig. 1 3.
  • the profile wire shows a manufacturing induced induced fiber structure 4, which extends in the longitudinal direction of the wire.
  • This profile wire 1 is then welded in a butt-welding process using the fertilizer according to the invention, described above parameters.
  • a material displacement with bead formation is produced with the corresponding compression path.
  • the temperature, geometry of the joint and the temperature control detects the broadest possible volume of material, preferably at least the wall thickness in order to achieve mild local temperature differences and thus low voltage gradients.
  • an intimate connection is produced by pressing at temperatures immediately at the welding edges 2 above the solidus temperature where the material is in the doughy state.
  • the structure thus consists of a partially liquid austenite with dissolved carbon interspersed with primary and secondary carbides.
  • FIG. 3 is a micrograph by a welded roller bearing ring, which is not yet hardened and tempered, shows, with the associated hardness chart of FIG. 4 via the weld, while Fig. 5 shows a welded below but cured at 830 0 C and annealed at 160 0 C roller bearing ring with the associated hardness profile of FIG. 6 shows.
  • Fig. 3 shows a section of a microsection through a rolling bearing ring 5 according to the invention, which is welded together along the weld 6.
  • Welding processes 7 at both ends of the weld seam 6 are formed in the welding process itself.
  • the decisive factor in welding is that the temperature, the geometry of the joint and the joining of the temperature encompass the widest possible material volume of at least the simple wall thickness. so that mild local temperature differences, ie a gentle temperature gradient is set and thus low voltage gradients can be obtained.
  • the structure consists of a partially liquid austenite with dissolved carbon interspersed with primary and secondary carbides.
  • the ring shown in Fig. 5 shows in the weld area a GKZ structure, such is also in the rest ring area ,
  • the carbides are extremely fine in the area of the weld. This makes it possible to peel off the weld beads 7.
  • the microstructure in the weld zone thus has a fine-grained carbide structure and a fine austenite grain, generated by the forming energy, which contributes to the increased nuclei number and thus to fine crystal formation, and in the core direction a vaulted fiber orientation (as shown in FIG. 2).
  • the remainder of the ring retains its original GKZ structure in the coarser state as compared to the fine grained GKZ structure in the weld area.
  • Fig. 4 shows the corresponding hardness profile over the weld.
  • the rolling bearing ring 5 consists of 100Cr6.
  • the material In the area outside the weld, the material has a hardness of about 200 HV 0.5. In the weld area, the hardness increases significantly to a maximum value of 828 HV 0.5. That is, the structure in the region of the weld is extremely hard, but very homogeneous and metallurgically comparable to the structure of the other ring.
  • Fig. 5 shows a microsection through a rolling bearing ring 8 according to the invention, which is welded, then cured at 830 0 C and finally tempered at 160 0 C. Again, in the area of the weld seam 9, the corresponding weld beads 10 are formed which have not yet been removed.
  • Fig. 6 shows the corresponding hardness profile.
  • the hardening results in a hardness profile in the region of the base material of 740-760 HV 0.5, wherein the hardness in the region of the weld seam - corresponding to the hardness plateau in FIG. 4 - increases to a maximum value of 823 HV 0.5.
  • a substantially homogeneous hardness curve in the base material with a somewhat higher hardness in the region of the weld is established.
  • the microstructures in the material as well as in the weld are very similar, there are no notches, relevant differences in size, etc., so that overall quasi-homogeneous mechanical properties are established in the weld area and in the other ring area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne une bague de roulement soudée, fabriquée à partir d'un fil profilé laminé à froid constitué d'un acier de roulement de composition hypereutectoïde présentant une teneur en carbone d'au moins 0,7 % et une structure de cémentite sphéroïdale à gros grains et recuit doux par soudage en bout avec refoulement, ladite bague de roulement présentant, au niveau du cordon de soudure, une structure de cémentite martensitique d'indice de carbure supérieur et à grains plus fins que dans le reste de la bague.
PCT/EP2006/002697 2005-04-01 2006-03-24 Bague de roulement soudee en acier de roulement WO2006103021A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005014967.7 2005-04-01
DE102005014967A DE102005014967A1 (de) 2005-04-01 2005-04-01 Geschweißter Wälzlagerring aus Wälzlagerstahl

Publications (2)

Publication Number Publication Date
WO2006103021A2 true WO2006103021A2 (fr) 2006-10-05
WO2006103021A3 WO2006103021A3 (fr) 2007-02-22

Family

ID=36602929

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/002697 WO2006103021A2 (fr) 2005-04-01 2006-03-24 Bague de roulement soudee en acier de roulement

Country Status (2)

Country Link
DE (1) DE102005014967A1 (fr)
WO (1) WO2006103021A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012002869A1 (fr) 2010-07-02 2012-01-05 Aktiebolaget Skf Composant de roulement soudé par étincelage

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013285A1 (de) * 2008-03-07 2009-09-10 Ab Skf Bauelement einer Wälzlagerung
DE102009056038B4 (de) 2009-11-27 2022-05-19 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines Lagerrings für ein Wälzlager, insbesondere für ein Dünnringlager, und Wälzlager, insbesondere Dünnringlager, umfassend wenigstens einen Lagerring hergestellt nach dem Verfahren
DE102010012167A1 (de) * 2010-03-20 2011-09-22 Schaeffler Technologies Gmbh & Co. Kg Verfahren zur gleichzeitigen Herstellung von mehr als einem Lagerring für ein Kegelrollenlager
JP5697901B2 (ja) * 2010-06-09 2015-04-08 Ntn株式会社 転がり軸受軌道輪用リング部材および転がり軸受
WO2012002865A1 (fr) * 2010-07-02 2012-01-05 Aktiebolaget Skf Bague de palier et procédé pour sa fabrication
US9097278B2 (en) 2010-07-02 2015-08-04 Aktiebolaget Skf Bearing ring with an additional component and method for producing such a bearing ring
WO2012044224A1 (fr) * 2010-09-28 2012-04-05 Aktiebolaget Skf Bague de palier à bride et son procédé de production
JP2015510452A (ja) * 2011-12-20 2015-04-09 アクティエボラゲット・エスコーエッフ フラッシュバット溶接によって鋼構成要素を製造する方法、および本方法を用いて作成された構成要素
RU2014129796A (ru) * 2011-12-20 2016-02-10 Актиеболагет Скф Способ, кольцо и подшипник

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1552099A1 (de) * 1965-03-23 1970-12-03 Torin Corp Verfahren zur Herstellung von Lagerkaefigen u.dgl.
DE3248634A1 (de) * 1982-12-30 1984-07-12 Jürgen Dr.-Ing. 8523 Baiersdorf Breme Verfahren zur herstellung eines ringformkoerpers, insbesondere eines waelzlagerringrohlings
US4973368A (en) * 1988-09-02 1990-11-27 Ovako Steel Ab Method of manufacturing steel elements designed to withstand high stress, such as roller bearing elements
DE19910928A1 (de) * 1999-03-12 2000-09-14 Schaeffler Waelzlager Ohg Verfahren zur Herstellung eines Käfigs für ein Wälzlager und nach dem Verfahren hergestellter Käfig
US6383317B1 (en) * 1997-04-04 2002-05-07 Ascometal Process for the manufacture of a component for bearings and its products

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741826A (en) * 1952-12-27 1956-04-17 Wheel Craft Corp Method of assembling a ball bearing
DE1726598U (de) * 1956-03-06 1956-07-19 Kugelfischer G Schaefer & Co Ringe, insbesondere fuer grosse waelzlager.
US3387900A (en) * 1964-10-06 1968-06-11 Skf Ind Inc Rolling bearing assemblies
GB1141901A (en) * 1965-07-22 1969-02-05 Torrington Mfg Co Method for making welded bearing races and other articles
GB1092667A (en) * 1965-07-27 1967-11-29 Cooper Roller Bearings Company Improvements in or relating to ball and roller bearings
US3533157A (en) * 1966-04-23 1970-10-13 Sumitomo Metal Ind Method of producing pressure-welded pipes
DE3741861A1 (de) * 1987-12-10 1989-06-22 Schaeffler Waelzlager Kg Waelzlagerlaufring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1552099A1 (de) * 1965-03-23 1970-12-03 Torin Corp Verfahren zur Herstellung von Lagerkaefigen u.dgl.
DE3248634A1 (de) * 1982-12-30 1984-07-12 Jürgen Dr.-Ing. 8523 Baiersdorf Breme Verfahren zur herstellung eines ringformkoerpers, insbesondere eines waelzlagerringrohlings
US4973368A (en) * 1988-09-02 1990-11-27 Ovako Steel Ab Method of manufacturing steel elements designed to withstand high stress, such as roller bearing elements
US6383317B1 (en) * 1997-04-04 2002-05-07 Ascometal Process for the manufacture of a component for bearings and its products
DE19910928A1 (de) * 1999-03-12 2000-09-14 Schaeffler Waelzlager Ohg Verfahren zur Herstellung eines Käfigs für ein Wälzlager und nach dem Verfahren hergestellter Käfig

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012002869A1 (fr) 2010-07-02 2012-01-05 Aktiebolaget Skf Composant de roulement soudé par étincelage
US9080608B2 (en) 2010-07-02 2015-07-14 Aktiebolaget Skf Flash-butt welded bearing component

Also Published As

Publication number Publication date
WO2006103021A3 (fr) 2007-02-22
DE102005014967A1 (de) 2006-10-05

Similar Documents

Publication Publication Date Title
WO2006103021A2 (fr) Bague de roulement soudee en acier de roulement
DE102014008718B3 (de) Maßgeschneidertes Halbzeug und Kraftfahrzeugbauteil
DE102016013466A1 (de) Karosseriebauteil für ein Kraftfahrzeug und Verfahren zum Herstellen eines Karosseriebauteils
DE102005052069B4 (de) Verfahren zum Herstellen von Vormaterial aus Stahl durch Warmverformen
DE102006057864A1 (de) Verbund aus zwei Stahlblechen
DE3340031A1 (de) Panzerblech und verfahren zu seiner herstellung
EP2886332A1 (fr) Produit en acier plat, composant en acier fabriqué à partir d'un tel produit en acier plat et carrosserie de véhicule automobile
DE102015112327A1 (de) Karosserie- oder Fahrwerkbauteil eines Kraftfahrzeuges mit verbesserter Crashperformance sowie Verfahren zu dessen Herstellung
WO2015014902A1 (fr) Ensemble d'éléments durcis et procédé de fabrication
WO2016074666A1 (fr) Élément de carrosserie ou de châssis à protection anticorrosion et procédé pour le produire
WO2018029191A1 (fr) Élément de châssis présentant une résistance élevée en service
WO2018133928A1 (fr) Procédé de fabrication d'une roue de véhicule en tôle
WO2020239164A1 (fr) Écrou profilé d'un mécanisme de vis-écrou, en particulier vis-écrou à billes d'un mécanisme de vis-écrou à billes et procédé pour la fabrication de celui-ci
DE112019005950T5 (de) Warmgewalzte stahlplatte mit hoher oberflächenbeschaffenheit, niedrigem streckgrenzenverhältnis und hoher festigkeit und verfahren zur herstellung derselben
EP2414552B1 (fr) Pivots à rotule en aciers à structure bainitique pour de véhicules à usage personnel et de véhicules utilitaires légers
DE102008040689A1 (de) Kugelzapfen und -hülsen aus hochmanganhaltigem Stahl
DE102018106546A1 (de) Rohrelement für Gasdruckbehälter und Gasdruckbehälter
DE102015111150A1 (de) Stahllegierung, insbesondere für Fahrwerks- oder Antriebsbauteil, und Fahrwerks- oder Antriebsbauteil
EP3356077B1 (fr) Utilisation d'une pièce en acier possédant une qualité de surface améliorée
DE102007015963A1 (de) Verfahren zum Herstellen von aus Stahlblechen bestehenden Flachprodukten, aus Stahlblechen zusammengesetztes Stahlflachprodukt und Strukturbauteil
DE102019103502A1 (de) Verfahren zur Herstellung eines nahtlosen Stahlrohres, nahtloses Stahlrohr und Rohrprodukt
EP1992710B1 (fr) Utilisation d'un alliage d'acier
DE4232115C2 (de) Verwendung eines austenitischen Stahls als hochbelastbares Befestigungselement
DE102016107141A1 (de) Kraftfahrzeuganhänger, Fahrwerkachse, insbesondere für einen Kraftfahrzeuganhänger und Verwendung der Fahrwerksachse und eines Werkstoffes
EP3414109A1 (fr) Roue de véhicule utilitaire et utilisation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

NENP Non-entry into the national phase

Ref country code: RU

WWW Wipo information: withdrawn in national office

Country of ref document: RU

122 Ep: pct application non-entry in european phase

Ref document number: 06723680

Country of ref document: EP

Kind code of ref document: A2

WWW Wipo information: withdrawn in national office

Ref document number: 6723680

Country of ref document: EP