EP0753595B1 - Tuyaux pour la fabrication de stabilisateurs et fabrication de stabilisateurs à partir desdits tuyaux - Google Patents

Tuyaux pour la fabrication de stabilisateurs et fabrication de stabilisateurs à partir desdits tuyaux Download PDF

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Publication number
EP0753595B1
EP0753595B1 EP96109631A EP96109631A EP0753595B1 EP 0753595 B1 EP0753595 B1 EP 0753595B1 EP 96109631 A EP96109631 A EP 96109631A EP 96109631 A EP96109631 A EP 96109631A EP 0753595 B1 EP0753595 B1 EP 0753595B1
Authority
EP
European Patent Office
Prior art keywords
stabilisers
stabilizers
pipes
max
tubes
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
EP96109631A
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German (de)
English (en)
Other versions
EP0753595A3 (fr
EP0753595A2 (fr
Inventor
Norbert Dipl.-Ing Bergs
Stefan Dipl.-Ing Dr.Klatzer
Dieter Dipl.-Ing Dr.Töpker
Gerhard Dipl.-Ing Beer
Gert Dr. Rer.Nat.Habil. Vaubel
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.)
Benteler Deustchland GmbH
Original Assignee
Benteler Deustchland 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
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Application filed by Benteler Deustchland GmbH filed Critical Benteler Deustchland GmbH
Publication of EP0753595A2 publication Critical patent/EP0753595A2/fr
Publication of EP0753595A3 publication Critical patent/EP0753595A3/fr
Application granted granted Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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

Definitions

  • the invention relates to the use of a steel alloy for pipes for the production of stabilizers for Motor vehicles, a stabilizer from such Steel alloy and method for producing stabilizers.
  • Stabilizers are components used in automotive engineering to reduce the curvature of the body and to influence self-steering behavior, e.g. to Reduction of oversteer can be used. she stiffen the suspension with one-sided loading, for example when driving over one-sided obstacles.
  • Stabilizers are usually designed as torsion bars are mounted in the main part of the vehicle transversely to the direction of travel and via U-shaped legs on the wheel suspensions attack. For stabilization you do that Use the material's resistance to twisting.
  • the ends of the stabilizer are each rigid with one Connected side of the axis and act as a lever arm. Becomes the vehicle body when cornering due to centrifugal force inclined to the side, the inside wheel bends more strongly one as the outer. This will twist the stabilizer and acts through its spring force of the side inclination opposite.
  • Stabilizers of the usual type have so far been predominantly made from solid bars. They are available in straight and curved versions.
  • WO 93/18189 describes the manufacture of vibrating bars or torsion stabilizers from high-strength steels.
  • steels with an oriented course of the microstructure are used. The forming takes place either warm below the recrystallization temperature or cold below a temperature of 149 ° C.
  • the steels described there have a yield strength Re of at least 620 N / mm 2 and a tensile strength R m of at least 827 N / mm 2 . They have a carbon content of 0.3% to 1%, manganese from 2.0%% to 2.5%% and up to 0.35% vanadium.
  • the bars used to manufacture the stabilizers are hot rolled or cold drawn.
  • the surface quality of the outer and inner surface of the pipes used is of the utmost importance.
  • the pipes with longitudinal seams have the best surface quality from rolled steel strip. This will make the seamless drawn tubes occurring defects, such as wrinkles etc. avoided.
  • the previously used steels for pipes Manufacture of stabilizers have a high carbon content and sometimes have a toughness that is too low.
  • the low toughness of the steels has an effect especially with seamless pipes mainly due to the reduced surface quality negatively on the fatigue strength out.
  • the required strength is a complex remuneration process with high tempering temperatures of approx. 600 ° C necessary. Due to the high tempering temperatures it is necessary that the stabilizers during the starting process to avoid warping in special devices be clamped. However, this effort leads to a Increase manufacturing costs.
  • the invention is therefore based on the object Steel alloy to specify pipes in their mechanical Properties meet the high requirements for manufacturing of stabilizers. Keep aiming the invention on an economical production of high quality stabilizers from such tubes from.
  • the alloy engineering part of the task is performed by the Use of the alloy specified in claim 1 solved.
  • the invention adopts the knowledge that for the manufacture of stabilizers from pipes, with the high demands on the mechanical properties, a pipe material is required which, depending on the tempering temperature, tensile strengths R m of 1100 to 1600 N / mm 2 , 0.2 % Yield strengths R p0.2 from 900 to 1300 N / mm 2 and an elongation at break A 5 of 6 to 15%.
  • the most important advantage of the steel alloy according to the invention is therefore seen in the fact that the proposed alloy, compared with the use of the known alloys from which tubes for stabilizers are produced, achieves the specified values of tensile strength, yield strength and elongation at break, and that, in addition, when they are used only one alloy can cover a wide range of required mechanical characteristics. For this purpose, the alloy components are optimally coordinated.
  • the carbon content ensures sufficient Strength and hardenability.
  • the silicon content determines the tensile strength and the yield strength, the Toughness properties are only slightly affected.
  • the manganese also increases the strength of the Steel alloy, the elongation at break is only slight is reduced. In addition, the manganese has a favorable effect on weldability. In connection with the Carbon content, it improves wear resistance.
  • the titanium content is mainly used for Stabilization against intergranular corrosion used.
  • the boron improves the hardening and increases the core strength.
  • the steel alloy according to the invention is inexpensive. Pipes made of such a steel alloy can also be used in existing systems for the production of stabilizers made of solid material can be used without any problems. Compensation systems are already in place here.
  • Stabilizers according to claim 3 have a - compared to known Stabilizers made of solid material, reduced weight on. The heavy loads when used in motor vehicles withstand these stabilizers reliably.
  • the pipes treated in this way then become stabilizers in terms of metal forming with the usual process steps manufactured. This is followed by water hardening of the stabilizers. Water hardening is preferred in the tool itself, so that an additional pick-up the stabilizers for the purpose of hardening are omitted.
  • a clamping of the stabilizers when starting to avoid is in delay in this tempering temperature range not mandatory.
  • the ends of the stabilizers upset (claim 6). This is followed by a quenching process on. This is preferably done with water of temperatures above 800 ° C. To be particularly advantageous has quench hardening above a temperature of 920 ° C.
  • untreated pipes can also be used, as provided for in claim 7.
  • the bending takes place at a temperature above the upper transition temperature, the A C3 point in the iron-carbon diagram. After the bending process, quench hardening is again carried out in the tool. A message is then not necessary.
  • heating is Stabilizers after curing to a temperature below the transformation temperature advantageous.
  • the tempering temperature should therefore not exceed 350 ° C.
  • Another solution to the procedural part of the task includes claim 9. Thereafter, those from the invention Alloy-manufactured tubes, and that before the forming process to stabilizers. A Remuneration after bending can be omitted. This approach is particularly pragmatic and economical.
  • the tempering of the tubes comprises the double step of hardening and tempering. This will cause the tube to bend before great strength and high yield strength as well as great toughness.
  • Hardening consists of heating to hardening temperature, holding and quenching. Then it starts warmed up again and finally quenched or slowly cooled down.
  • the pipes can be bent afterwards Stress relievers are made to stabilizers, as provided for in claim 10. This can cause structural changes or residual stresses are reduced.
  • this annealing process is limited to the area the arches of a stabilizer.
  • the annealing temperature is included chosen so that the remuneration strength of the Stabilizer is not reduced.
  • a production line for the manufacture of stabilizers made of welded pipes and a production line for the production of stabilizers from seamless tubes according to the inventive method is technical generalized in the accompanying Figures 1 and 2.
  • FIG. 1 it should be pointed out that with welded pipes depending on their diameter stretch reduction is not absolutely necessary is.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Vehicle Body Suspensions (AREA)
  • Heat Treatment Of Articles (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Springs (AREA)

Claims (10)

  1. Utilisation d'un alliage d'acier pour des tubes pour la fabrication de stabilisateurs pour véhicules automobiles, notamment pour des stabilisateurs de torsion, qui est constitué, d'une manière exprimée par des pourcentages en poids, par
    carbone (C) 0,18 % à 0,30 %
    silicium (Si) 0,10 % à 0,50 %
    manganèse (Mn) 1,10 % à 1,80 %
    phosphore (P) maximum 0,025 %
    soufre (S) maximum 0,025 %
    titane (Ti) 0,020 % à 0,050 %
    bore (B) 0,0005 % à 0,005 %
    aluminium 0,010 % à 0,050 %,
    le reste étant formé de fer y compris des impuretés conditionnées par la fusion.
  2. Utilisation d'un alliage d'acier selon la revendication 1, qui est constitué, d'une manière exprimée selon des pourcentages en poids, par
    carbone (C) 0,21 % à 0,26 %
    silicium (Si) 0,15 % à 0,35 %
    manganèse (Mn) 1,20 % à 1,40 %
    phosphore (P) maximum 0,025 %
    soufre (S) maximum 0,025 %
    titane (Ti) 0,020 % à 0,040 %
    bore (B) 0,0020 % à 0,0040 %
    aluminium 0,020 % à 0,035 %
    le reste étant formé de fer y compris des impuretés conditionnées par la fusion.
  3. Stabilisateur formé d'un alliage d'acier selon l'une des revendications 1 ou 2.
  4. Procédé pour fabriquer des stabilisateurs à partir de tubes étirés ou soudés selon l'une des revendications 1 ou 2, incluant les dispositions suivantes :
    a) recuit normal des tubes;
    b) fabrication des stabilisateurs;
    c) trempe à l'eau des stabilisateurs, ceci s'effectuant notamment dans l'outil.
  5. Procédé selon la revendication 4, caractérisé en ce qu'un revenu est effectué dans l'air à une température comprise entre 200°C et 400°C.
  6. Procédé selon la revendication 4 ou 5, selon lequel on refoule les extrémités des stabilisateurs et on leur applique un refroidissement brusque à des températures supérieures à 800°C, notamment à 920°C.
  7. Procédé pour fabriquer des stabilisateurs cintrés formés de tubes non améliorés par trempe et revenu selon l'une des revendications 1 ou 2, caractérisé en ce qu'on réalise le cintrage au-dessus du point AC3 et qu'après l'opération de cintrage, on effectue un refroidissement brusque dans l'outil.
  8. Procédé selon la revendication 7, caractérisé en ce qu'on effectue un revenu à une température atteignant jusqu'à 350°C.
  9. Procédé pour fabriquer des stabilisateurs cintrés à partir de tubes selon l'une des revendications 1 ou 2, caractérisé en ce qu'on applique un traitement thermique au tube et que l'on cintre ensuite ces derniers pour former des stabilisateurs.
  10. Procédé selon la revendication 9, caractérisé en ce qu'après le cintrage, on réalise un recuit de faible contrainte de préférence des parties cintrées.
EP96109631A 1995-07-06 1996-06-25 Tuyaux pour la fabrication de stabilisateurs et fabrication de stabilisateurs à partir desdits tuyaux Expired - Lifetime EP0753595B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19524574 1995-07-06
DE19524574 1995-07-06

Publications (3)

Publication Number Publication Date
EP0753595A2 EP0753595A2 (fr) 1997-01-15
EP0753595A3 EP0753595A3 (fr) 1998-08-26
EP0753595B1 true EP0753595B1 (fr) 2001-08-08

Family

ID=7766123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109631A Expired - Lifetime EP0753595B1 (fr) 1995-07-06 1996-06-25 Tuyaux pour la fabrication de stabilisateurs et fabrication de stabilisateurs à partir desdits tuyaux

Country Status (4)

Country Link
EP (1) EP0753595B1 (fr)
CZ (1) CZ287707B6 (fr)
DE (1) DE59607441D1 (fr)
ES (1) ES2159662T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054847B3 (de) * 2005-11-15 2007-10-04 Benteler Automobiltechnik Gmbh Hochfestes Stahlbauteil mit gezielter Deformation im Crashfall
DE102007006875A1 (de) 2007-02-07 2008-08-14 Benteler Stahl/Rohr Gmbh Verwendung einer Stahllegierung als Werkstoff zur Herstellung von dynamisch belasteten Rohrbauteilen und Rohrbauteil
US9188252B2 (en) 2011-02-18 2015-11-17 Siderca S.A.I.C. Ultra high strength steel having good toughness
US9340847B2 (en) 2012-04-10 2016-05-17 Tenaris Connections Limited Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same
US9598746B2 (en) 2011-02-07 2017-03-21 Dalmine S.P.A. High strength steel pipes with excellent toughness at low temperature and sulfide stress corrosion cracking resistance

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10007192C2 (de) * 2000-02-17 2002-10-24 Benteler Werke Ag Lenker für Kraftfahrzeuge
US6488791B1 (en) * 2001-07-03 2002-12-03 Metalsa Roanoke Inc. Method for strengthening a steel channel member
DE10315419B3 (de) * 2003-04-04 2004-05-19 Thyssenkrupp Automotive Ag Verfahren zum Herstellen von Schraubenfedern oder Stabilisatoren
WO2004097059A1 (fr) 2003-04-25 2004-11-11 Tubos De Acero De Mexico, S.A. Tube en acier sans jointure susceptible d'etre utilise comme canaliseur et procede d'obtention
US7744708B2 (en) 2006-03-14 2010-06-29 Tenaris Connections Limited Methods of producing high-strength metal tubular bars possessing improved cold formability
WO2008000300A1 (fr) 2006-06-29 2008-01-03 Tenaris Connections Ag Tubes en acier de précision sans soudure à résistance isotropique à basse température pour vérins hydrauliques et procédés d'obtention desdits tubes
DE102007023306A1 (de) * 2007-05-16 2008-11-20 Benteler Stahl/Rohr Gmbh Verwendung einer Stahllegierung für Mantelrohre zur Perforation von Bohrlochverrohrungen sowie Mantelrohr
US7862667B2 (en) 2007-07-06 2011-01-04 Tenaris Connections Limited Steels for sour service environments
EP2238272B1 (fr) 2007-11-19 2019-03-06 Tenaris Connections B.V. Acier bainitique de haute résistance destiné à des applications octg
CA2686301C (fr) 2008-11-25 2017-02-28 Maverick Tube, Llc Traitement de bandes compactes ou d'ebauches etamees d'aciers au bore et au titanium
DE102011009104A1 (de) * 2011-01-21 2012-07-26 Audi Ag Aktiver Steller für ein Kraftfahrzeugfahrwerk
US9163296B2 (en) 2011-01-25 2015-10-20 Tenaris Coiled Tubes, Llc Coiled tube with varying mechanical properties for superior performance and methods to produce the same by a continuous heat treatment
IT1403688B1 (it) 2011-02-07 2013-10-31 Dalmine Spa Tubi in acciaio con pareti spesse con eccellente durezza a bassa temperatura e resistenza alla corrosione sotto tensione da solfuri.
US8636856B2 (en) 2011-02-18 2014-01-28 Siderca S.A.I.C. High strength steel having good toughness
CA2897451C (fr) 2013-01-11 2019-10-01 Tenaris Connections Limited Joint d'outil de tige de forage resistant au grippage et tige de forage correspondante
DE102013101276A1 (de) * 2013-02-08 2014-08-14 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftfahrzeugstabilisators
US9187811B2 (en) 2013-03-11 2015-11-17 Tenaris Connections Limited Low-carbon chromium steel having reduced vanadium and high corrosion resistance, and methods of manufacturing
US9803256B2 (en) 2013-03-14 2017-10-31 Tenaris Coiled Tubes, Llc High performance material for coiled tubing applications and the method of producing the same
EP2789700A1 (fr) 2013-04-08 2014-10-15 DALMINE S.p.A. Tuyaux en acier sans soudure trempé et revenu à paroi lourde et procédé de fabrication des tuyaux d'acier
EP2789701A1 (fr) 2013-04-08 2014-10-15 DALMINE S.p.A. Tuyaux en acier sans soudure trempé et revenu à paroi moyenne haute résistance et procédé de fabrication des tuyaux d'acier
KR102368928B1 (ko) 2013-06-25 2022-03-04 테나리스 커넥션즈 비.브이. 고크롬 내열철강
US11124852B2 (en) 2016-08-12 2021-09-21 Tenaris Coiled Tubes, Llc Method and system for manufacturing coiled tubing
US10434554B2 (en) 2017-01-17 2019-10-08 Forum Us, Inc. Method of manufacturing a coiled tubing string

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US4781054A (en) * 1986-12-19 1988-11-01 Rockwell International Suspension Systems Company Apparatus for bending and forming heated tubular workpieces
US4854150A (en) * 1986-12-19 1989-08-08 Rockwell International Suspension Systems Company Method of bending and forming heated tubular workpieces
US5236520A (en) * 1990-10-24 1993-08-17 Consolidated Metal Products, Inc. High strength steel sway bars and method of making
DE4321241A1 (de) * 1993-06-25 1995-01-05 Hesonwerk Dr Iske Gmbh Verwendung von Stahlrohren oder Stahlstäben zur Herstellung von Fahrwerksstabilisatoren für Kraftfahrzeuge

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054847B3 (de) * 2005-11-15 2007-10-04 Benteler Automobiltechnik Gmbh Hochfestes Stahlbauteil mit gezielter Deformation im Crashfall
DE102007006875A1 (de) 2007-02-07 2008-08-14 Benteler Stahl/Rohr Gmbh Verwendung einer Stahllegierung als Werkstoff zur Herstellung von dynamisch belasteten Rohrbauteilen und Rohrbauteil
EP1961832A1 (fr) 2007-02-07 2008-08-27 Benteler Stahl/Rohr Gmbh Utilisation d'un alliage d'acier en tant que matière première pour la fabrication de composants de tuyaux chargés dynamiquement et composant de tuyau
US9598746B2 (en) 2011-02-07 2017-03-21 Dalmine S.P.A. High strength steel pipes with excellent toughness at low temperature and sulfide stress corrosion cracking resistance
US9188252B2 (en) 2011-02-18 2015-11-17 Siderca S.A.I.C. Ultra high strength steel having good toughness
US9340847B2 (en) 2012-04-10 2016-05-17 Tenaris Connections Limited Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same

Also Published As

Publication number Publication date
CZ9602015A3 (cs) 1999-06-16
EP0753595A3 (fr) 1998-08-26
DE59607441D1 (de) 2001-09-13
CZ287707B6 (en) 2001-01-17
ES2159662T3 (es) 2001-10-16
EP0753595A2 (fr) 1997-01-15

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