EP0753595A2 - 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
EP0753595A2
EP0753595A2 EP96109631A EP96109631A EP0753595A2 EP 0753595 A2 EP0753595 A2 EP 0753595A2 EP 96109631 A EP96109631 A EP 96109631A EP 96109631 A EP96109631 A EP 96109631A EP 0753595 A2 EP0753595 A2 EP 0753595A2
Authority
EP
European Patent Office
Prior art keywords
stabilizers
pipes
stabilisers
tubes
max
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.)
Granted
Application number
EP96109631A
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German (de)
English (en)
Other versions
EP0753595B1 (fr
EP0753595A3 (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
Publication of EP0753595B1 publication Critical patent/EP0753595B1/fr
Anticipated expiration legal-status Critical
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    • 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 manufacture of stabilizers for motor vehicles, a stabilizer made of such a steel alloy and a method for the manufacture of stabilizers.
  • Stabilizers are components that are used in automotive engineering to reduce the curvature of the body and to influence the self-steering behavior, e.g. to reduce oversteer. They stiffen the suspension when one-sided loading occurs, for example when driving over unilateral obstacles.
  • Stabilizers are usually designed as torsion bars, which are mounted transversely to the direction of travel in the main vehicle part and act on the wheel suspensions via U-shaped legs. For stabilization you do that Use the material's resistance to twisting.
  • the ends of the stabilizer are rigidly connected to one side of the axle and act as a lever arm. If the vehicle body is tilted to the side when cornering due to the centrifugal force, the inside wheel bends more than the outside wheel. As a result, the stabilizer is twisted and counteracts the side tilt due to its spring force.
  • 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 R e 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 in order to achieve high fatigue strength.
  • Longitudinally welded tubes made from rolled steel strip have the best surface quality. This avoids the errors that occur with seamlessly drawn pipes, such as wrinkles, etc.
  • the steels used so far for tubes for the production of stabilizers have a high carbon content and in some cases their toughness is too low.
  • the low toughness of the steels has a negative effect on the fatigue strength, particularly in the case of seamless pipes, mainly due to the reduced surface quality.
  • complex tempering processes with high tempering temperatures of approx. 600 ° C are necessary. Due to the high tempering temperatures, however, it is necessary that the stabilizers be clamped in special devices during the tempering process to avoid warping. However, this effort leads to an increase in manufacturing costs.
  • the invention is therefore based on the object of specifying a steel alloy for pipes, the mechanical properties of which meet the high requirements for the production of stabilizers. Furthermore, the invention aims at the economical production of high quality stabilizers from such tubes.
  • the alloy engineering part of the object is achieved by using the alloy specified in claim 1.
  • 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, whereby the toughness properties are only slightly influenced.
  • the manganese also increases the strength of the steel alloy, whereby the elongation at break is only slightly reduced. In addition, the manganese has a favorable effect on weldability. Combined with the carbon content, it improves wear resistance.
  • the titanium content is mainly used for Stabilization against intergranular corrosion used.
  • the boron improves through-hardening and increases core strength.
  • the addition of aluminum supports fine grain formation.
  • the alloy according to the invention therefore has good ductility and weldability. This is associated with the advantage that, in addition to the use of seamless tubes, it is also possible to use longitudinally welded tubes which are more suitable for the intended use.
  • the steel alloy according to the invention has better toughness properties than known steels and makes it easier to temper. For example, lower tempering temperatures can be used.
  • 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 from solid material without any problems. Compensation systems are already in place here.
  • Stabilizers according to claim 3 have a reduced weight compared to known stabilizers made of solid material. These stabilizers reliably withstand the heavy loads when used in motor vehicles.
  • Stabilizers are then produced from the pipes treated in this way using the usual process steps. This is followed by water hardening of the stabilizers.
  • the water is preferably hardened in the tool itself, so that there is no need to additionally take up the stabilizers for the purpose of hardening.
  • starting in air can take place at a temperature between 200 ° C and 400 ° C, as provided for in claim 5.
  • the martensite structure that occurs during hardening is sometimes very brittle. Therefore, the stabilizers are usually left on after hardening.
  • a temperature of approximately 250 ° C. has proven to be particularly advantageous.
  • the ends of the stabilizers are compressed (claim 6). This is followed by a quenching process. This is preferably done with water at temperatures above 800 ° C. Quench hardening above a temperature of 920 ° C. has proven to be particularly advantageous.
  • 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 the stabilizers after curing to a temperature below the transition temperature is advantageous.
  • the tempering temperature should therefore not exceed 350 ° C.
  • Another solution of the procedural part of the task includes claim 9. Thereafter, the tubes made from the alloy according to the invention are tempered, before the forming process to stabilizers. 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 gives the tube great strength and a high yield strength as well as great toughness before the bending process.
  • Hardening consists of heating to the hardening temperature, holding and quenching. After that, the engine is warmed up again and finally quenched or slowly cooled.
  • a stress relief annealing can be carried out after bending the tubes to stabilizers, as provided for in claim 10. As a result, structural changes or residual stresses can be reduced.
  • This annealing process is preferably limited to the area of the arcs of a stabilizer.
  • the annealing temperature is chosen so that the tempering strength of the stabilizer is not reduced.
  • a production line for the production of stabilizers from welded pipes and a production line for the production of stabilizers from seamless pipes according to the method according to the invention is represented in a technical generalized manner in the attached FIGS. 1 and 2.
  • FIG. 1 it should be pointed out that, depending on the diameter of welded pipes, it is not absolutely necessary to reduce the stretch.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Articles (AREA)
  • Vehicle Body Suspensions (AREA)
  • Springs (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
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 true EP0753595A2 (fr) 1997-01-15
EP0753595A3 EP0753595A3 (fr) 1998-08-26
EP0753595B1 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 (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004708A1 (fr) * 2001-07-03 2003-01-16 Metalsa Roanoke Inc. Us0220814procede de renforcement d'un profile en c conventionnel d'acier
EP1125774A3 (fr) * 2000-02-17 2003-11-19 Benteler Ag Composants de suspension de véhicules à moteur
WO2004087367A2 (fr) * 2003-04-04 2004-10-14 Thyssenkrupp Automotive Ag Procede de fabrication de ressorts helicoidaux ou de stabilisateurs
WO2007113690A3 (fr) * 2006-03-14 2008-02-28 Tenaris Connections Ag Procédés de production de barres tubulaires métalliques à haute tenue mécanique présentant une aptitude améliorée au formage à froid
WO2008138642A1 (fr) * 2007-05-16 2008-11-20 Benteler Stahl/Rohr Gmbh Utilisation d'un alliage d'acier pour des tuyaux de puits pour la perforation de cuvelages de puits de forage, et tuyau de puits
US8002910B2 (en) 2003-04-25 2011-08-23 Tubos De Acero De Mexico S.A. Seamless steel tube which is intended to be used as a guide pipe and production method thereof
US8202376B2 (en) 2005-11-15 2012-06-19 Benteler Automobiltechnik Gmbh High-strength motor-vehicle frame part with targeted crash
US8221562B2 (en) 2008-11-25 2012-07-17 Maverick Tube, Llc Compact strip or thin slab processing of boron/titanium steels
WO2012097855A1 (fr) * 2011-01-21 2012-07-26 Audi Ag Dispositif de réglage actif pour châssis de véhicule à moteur
US8328958B2 (en) 2007-07-06 2012-12-11 Tenaris Connections Limited Steels for sour service environments
US8328960B2 (en) 2007-11-19 2012-12-11 Tenaris Connections Limited High strength bainitic steel for OCTG applications
US8414715B2 (en) 2011-02-18 2013-04-09 Siderca S.A.I.C. Method of making ultra high strength steel having good toughness
US8636856B2 (en) 2011-02-18 2014-01-28 Siderca S.A.I.C. High strength steel having good toughness
EP2765014A1 (fr) * 2013-02-08 2014-08-13 Benteler Automobiltechnik GmbH Procédé de fabrication d'un stabilisateur de véhicule automobile
US8821653B2 (en) 2011-02-07 2014-09-02 Dalmine S.P.A. Heavy wall steel pipes with excellent toughness at low temperature and sulfide stress corrosion cracking resistance
US8926771B2 (en) 2006-06-29 2015-01-06 Tenaris Connections Limited Seamless precision steel tubes with improved isotropic toughness at low temperature for hydraulic cylinders and process for obtaining the same
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
US9644248B2 (en) 2013-04-08 2017-05-09 Dalmine S.P.A. Heavy wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes
US9657365B2 (en) 2013-04-08 2017-05-23 Dalmine S.P.A. High strength medium wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes
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
US9970242B2 (en) 2013-01-11 2018-05-15 Tenaris Connections B.V. Galling resistant drill pipe tool joint and corresponding drill pipe
US11105501B2 (en) 2013-06-25 2021-08-31 Tenaris Connections B.V. High-chromium heat-resistant steel
US11124852B2 (en) 2016-08-12 2021-09-21 Tenaris Coiled Tubes, Llc Method and system for manufacturing coiled tubing
US11833561B2 (en) 2017-01-17 2023-12-05 Forum Us, Inc. Method of manufacturing a coiled tubing string
US11952648B2 (en) 2011-01-25 2024-04-09 Tenaris Coiled Tubes, Llc Method of forming and heat treating coiled tubing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
IT1403689B1 (it) 2011-02-07 2013-10-31 Dalmine Spa Tubi in acciaio ad alta resistenza con eccellente durezza a bassa temperatura e resistenza alla corrosione sotto tensioni da solfuri.
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO1993018189A1 (fr) * 1992-03-09 1993-09-16 Consolidated Metal Products, Inc. Barres anti-devers en acier a haute resistance et leur procede de production
DE4321241A1 (de) * 1993-06-25 1995-01-05 Hesonwerk Dr Iske Gmbh Verwendung von Stahlrohren oder Stahlstäben zur Herstellung von Fahrwerksstabilisatoren für Kraftfahrzeuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO1993018189A1 (fr) * 1992-03-09 1993-09-16 Consolidated Metal Products, Inc. Barres anti-devers en acier a haute resistance et leur procede de production
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 (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1125774A3 (fr) * 2000-02-17 2003-11-19 Benteler Ag Composants de suspension de véhicules à moteur
WO2003004708A1 (fr) * 2001-07-03 2003-01-16 Metalsa Roanoke Inc. Us0220814procede de renforcement d'un profile en c conventionnel d'acier
WO2004087367A2 (fr) * 2003-04-04 2004-10-14 Thyssenkrupp Automotive Ag Procede de fabrication de ressorts helicoidaux ou de stabilisateurs
WO2004087367A3 (fr) * 2003-04-04 2005-04-28 Thyssen Krupp Automotive Ag Procede de fabrication de ressorts helicoidaux ou de stabilisateurs
CN100385020C (zh) * 2003-04-04 2008-04-30 泰森克鲁普汽车股份公司 用于加工螺旋弹簧或稳定器的方法
US8002910B2 (en) 2003-04-25 2011-08-23 Tubos De Acero De Mexico S.A. Seamless steel tube which is intended to be used as a guide pipe and production method thereof
US8202376B2 (en) 2005-11-15 2012-06-19 Benteler Automobiltechnik Gmbh High-strength motor-vehicle frame part with targeted crash
WO2007113690A3 (fr) * 2006-03-14 2008-02-28 Tenaris Connections Ag Procédés de production de barres tubulaires métalliques à haute tenue mécanique présentant une aptitude améliorée au formage à froid
US7744708B2 (en) 2006-03-14 2010-06-29 Tenaris Connections Limited Methods of producing high-strength metal tubular bars possessing improved cold formability
US8007601B2 (en) 2006-03-14 2011-08-30 Tenaris Connections Limited Methods of producing high-strength metal tubular bars possessing improved cold formability
US8926771B2 (en) 2006-06-29 2015-01-06 Tenaris Connections Limited Seamless precision steel tubes with improved isotropic toughness at low temperature for hydraulic cylinders and process for obtaining the same
WO2008138642A1 (fr) * 2007-05-16 2008-11-20 Benteler Stahl/Rohr Gmbh Utilisation d'un alliage d'acier pour des tuyaux de puits pour la perforation de cuvelages de puits de forage, et tuyau de puits
US8328958B2 (en) 2007-07-06 2012-12-11 Tenaris Connections Limited Steels for sour service environments
US8328960B2 (en) 2007-11-19 2012-12-11 Tenaris Connections Limited High strength bainitic steel for OCTG applications
US8221562B2 (en) 2008-11-25 2012-07-17 Maverick Tube, Llc Compact strip or thin slab processing of boron/titanium steels
WO2012097855A1 (fr) * 2011-01-21 2012-07-26 Audi Ag Dispositif de réglage actif pour châssis de véhicule à moteur
US11952648B2 (en) 2011-01-25 2024-04-09 Tenaris Coiled Tubes, Llc Method of forming and heat treating coiled tubing
US8821653B2 (en) 2011-02-07 2014-09-02 Dalmine S.P.A. Heavy wall steel pipes with excellent toughness at low temperature and sulfide stress corrosion cracking resistance
US8636856B2 (en) 2011-02-18 2014-01-28 Siderca S.A.I.C. High strength steel having good toughness
US9222156B2 (en) 2011-02-18 2015-12-29 Siderca S.A.I.C. High strength steel having good toughness
US8414715B2 (en) 2011-02-18 2013-04-09 Siderca S.A.I.C. Method of making ultra high strength steel having good toughness
US9970242B2 (en) 2013-01-11 2018-05-15 Tenaris Connections B.V. Galling resistant drill pipe tool joint and corresponding drill pipe
EP2765014A1 (fr) * 2013-02-08 2014-08-13 Benteler Automobiltechnik GmbH Procédé de fabrication d'un stabilisateur de véhicule automobile
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
US11377704B2 (en) 2013-03-14 2022-07-05 Tenaris Coiled Tubes, Llc High performance material for coiled tubing applications and the method of producing the same
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
US10378074B2 (en) 2013-03-14 2019-08-13 Tenaris Coiled Tubes, Llc High performance material for coiled tubing applications and the method of producing the same
US10378075B2 (en) 2013-03-14 2019-08-13 Tenaris Coiled Tubes, Llc High performance material for coiled tubing applications and the method of producing the same
US9644248B2 (en) 2013-04-08 2017-05-09 Dalmine S.P.A. Heavy wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes
US9657365B2 (en) 2013-04-08 2017-05-23 Dalmine S.P.A. High strength medium wall quenched and tempered seamless steel pipes and related method for manufacturing said steel pipes
US11105501B2 (en) 2013-06-25 2021-08-31 Tenaris Connections B.V. High-chromium heat-resistant steel
US11124852B2 (en) 2016-08-12 2021-09-21 Tenaris Coiled Tubes, Llc Method and system for manufacturing coiled tubing
US11833561B2 (en) 2017-01-17 2023-12-05 Forum Us, Inc. Method of manufacturing a coiled tubing string

Also Published As

Publication number Publication date
CZ9602015A3 (cs) 1999-06-16
EP0753595B1 (fr) 2001-08-08
CZ287707B6 (en) 2001-01-17
ES2159662T3 (es) 2001-10-16
EP0753595A3 (fr) 1998-08-26
DE59607441D1 (de) 2001-09-13

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