DE102006054389A1 - Selective adjustment of a defined hardness, firmness and/or ductility of press-hardened and/or hot formed sheet metal components useful in production of vehicle bodies, by covering and/or shielding defined areas/partial areas of components - Google Patents

Selective adjustment of a defined hardness, firmness and/or ductility of press-hardened and/or hot formed sheet metal components useful in production of vehicle bodies, by covering and/or shielding defined areas/partial areas of components Download PDF

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Publication number
DE102006054389A1
DE102006054389A1 DE102006054389A DE102006054389A DE102006054389A1 DE 102006054389 A1 DE102006054389 A1 DE 102006054389A1 DE 102006054389 A DE102006054389 A DE 102006054389A DE 102006054389 A DE102006054389 A DE 102006054389A DE 102006054389 A1 DE102006054389 A1 DE 102006054389A1
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components
areas
shielding
hardened
press
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DE102006054389A
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DE102006054389B4 (en
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Dieter Hartmann
Robert Vehof
Thomas Kurz
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Voestalpine Metal Forming GmbH
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Voestalpine Automotive Holding GmbH
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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
    • 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
    • C21D1/26—Methods of annealing
    • 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
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • C21D2221/00—Treating localised areas of an article
    • 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
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively

Abstract

The selective adjustment of a defined hardness, firmness and/or ductility of press-hardened and/or hot formed sheet metal components, comprises covering and/or shielding defined areas or partial areas of the components by a covering device or a shielding device, passing the components into a tempering furnace, and adjusting a predefined temperature and/or a predefined temperature range and/or a predefined temperature profile by the tempering furnace and the covering device and/or shielding device.

Description

Gezieltes Anlassen von pressgehärteten und warmumgeformten BauteilenTargeted tempering of press hardened and hot-formed components

Bei der Herstellung von Fahrzeugkarosserien werden häufig pressgehärtete sowie warmumgeformte Karosseriebauteile, hergestellt im indirekten und direkten Verfahren, eingesetzt.at The manufacture of vehicle bodies are often press-hardened as well hot formed body components, manufactured in indirect and direct method used.

Bei manchen dieser Bauteile ist eine Einflussnahme auf die Duktilität (Streckgrenze, Zugfestigkeit, Dehnung) sowie bei einigen Teilen auch nur eine bereichsweise Einflussnahme auf die Duktilität der Bauteile erforderlich bzw. von Vorteil.at some of these components influence the ductility (yield strength, Tensile strength, elongation) and in some parts only in some areas Influence on the ductility of the Components required or advantageous.

Situation/Stand der Technik:Situation / state of the art:

Blechbauteile mit Werkstofffestigkeit über 1.200 MPa sind schwierig zu formen. Es gibt aber ein Verfahren zum Härten von Bauteilen genannt PHS. Dies bringt aber die Festigkeit nach 1.500 MPa, was nicht für jedes Bauteil oder Bereiche von Bauteilen geeignet ist. Weiter gibt es die Möglichkeit zu sherar dieseren, aber das bringt die Werkstoffeigenschaften über das komplette Bauteil über 1.200 MPa. Andere Möglichkeiten um weichere Stellen einzubauen sind unterschiedliche Werkstoffqualitäten tailored welded blank (TWB). Andere Verfahren setzen unterschiedliche Blechstärken ein. Tailored rolled blank (TRB), patchwork und tailored welded blank.sheet metal parts with material strength over 1.200 MPa are difficult to shape. But there is a method of curing Components called PHS. But this brings the strength to 1,500 MPa, what not for every component or ranges of components is suitable. Next there it's the possibility to sherar dieseren, but that brings the material properties over the complete component over 1,200 MPa. Other options In order to install softer points different material qualities are tailored welded blank (TWB). Other methods use different sheet thicknesses. Tailored rolled blank (TRB), patchwork and tailored welded blank.

Probleme:problems:

  • – muss im 3D-Bauteil geschehen;- got to done in the 3D component;
  • – im Werkzeug ist es schwierig, prozesssicher unterschiedliche Abkühlraten zu schaffen;- in the Tool it is difficult to process different cooling rates to accomplish;
  • – induktive Erwärmung nicht homogen → unterschiedliche Anlasseigenschaften abhängig von Form, Loch und Schnittbild als auch Blechausdünnung als auch Verdickung;- inductive warming not homogeneous → different Starting characteristics dependent of shape, hole and sectional image as well as sheet thinning as also thickening;
  • – konduktive Erwärmung ist auch nicht homogen → siehe induktive Erwärmung;- conductive warming is also not homogeneous → see inductive heating;
  • – Werkzeugerwärmung → Kontakt sicher stellen- Tool heating → Contact to ensure

Lösung:Solution:

Anlassergebnisse sind in viel höherem Maße abhängig von der Anlasstemperatur als der Anlasszeit. Wärmeübergabe ist gut in Temperaturbereichen bis zu 500° mit jet heating. Die Temperatur kann auch ganz gut gesteuert werden. Relativ einfache jetheating-Öfen, wobei die Erwärmung lokal gesteuert werden kann, durch Unterbrechen oder Umlenkung der Luftströmung. Unterschiedliche Transportmöglichkeiten gibt es. Das vorgestellte Verfahren sollte auch funktionieren mit tailored welded blank (TWB) mit verschiedenen Werkstoffen als auch tailored rolled blank (TRB), patchwork.event results are in much higher Dimensions dependent on the tempering temperature as the tempering time. Heat transfer is good in temperature ranges up to to 500 ° with jet heating. The temperature can also be controlled quite well. Relatively simple jetheating ovens, being the warming can be controlled locally by interrupting or redirecting the air flow. different transportation is there. The presented procedure should also work with tailored welded blank (TWB) with various materials as well tailored rolled blank (TRB), patchwork.

Der Erfindung liegt unter Anderem als Aufgabe zugrunde, die Duktilität und/oder die Härte und/oder die Festigkeit von pressgehärteten oder warmumgeformten Bauteilen (Teilgeometriebereiche oder auch gesamte Teilgeometrie) gezielt zu beeinflussen.Of the The invention is, inter alia, as an object, the ductility and / or the hardness and / or the strength of press-hardened or hot-formed components (Teilgeometriebereiche or entire part geometry).

Die Erfindung wird nachfolgend beschrieben sowie durch die beigefügten Zeichnungsbeispiele anhand eines Beispiel Bauteiles Verstärkung B-Säule, (wobei dieses Verfahren jedoch für alle bekannten Bauteilgeometrien angewandt werden kann), erläutert.The The invention will be described below and by the accompanying drawing examples using an example component reinforcement B-pillar, (this method however for all known component geometries can be applied), explained.

Bereichsweises Anlassen von pressgehärteten Bauteilen:Partial tempering of press-hardened components:

Die Bauteile werden auf Trägergestellen, abgelegt, und bereichsweise mit Abschirmhauben (1) und (2) oder auch durch Thermodecken abgedeckt. Die Thermodecken können zusätzlich noch temperaturgesteuert (erwärmt oder gekühlt) werden.The components are stored on support racks, and partially with shielding hoods ( 1 ) and ( 2 ) or covered by thermal blankets. The thermal covers can additionally be temperature-controlled (heated or cooled).

Nach dem Abschirmen werden die Bauteile in den Anlassofen eingefahren. Im Ofen werden die Bauteile dann, gesteuert durch die beschriebenen Abschirmungsmaßnahmen, gezielt an den definierten Bereichen mit Temperaturen zwischen 100° und 600° Grad (abhängig nach den jeweiligen Anforderungen an die Bauteile) angelassen.To the shielding the components are retracted in the tempering furnace. In the oven, the components are then controlled by the described shielding measures, targeted at the defined areas with temperatures between 100 ° and 600 ° degrees (depending on the particular requirements on the components) annealed.

Die für das bereichsweise Anlassen der Bauteile notwendigen unterschiedlichen Temperaturbereiche werden zusätzlich noch durch die unterschiedlichen Wand-Dicken der Isolierhauben, sowie das darin befindliche Isoliermaterial, gezielt gesteuert. Des Weiteren steuern an einem Bauteil mehrere Hauben unterschiedlicher Dicke, sowie Hauben mit eingebrachten Löchern (3) die Temperaturführung.The necessary for the partial tempering of the components different temperature ranges are additionally controlled by the different wall thicknesses of the insulating hoods, as well as the insulating material therein, targeted. Furthermore, several hoods of different thicknesses and hoods with holes ( 3 ) the temperature control.

Bereichsweises Anlassen mit verschiedenen Temperaturzonen im Ofen:Partial starting with different Temperature zones in the oven:

Der Anlassofen (bevorzugt Jet Heating) wird in mehrere separat regelbare Temperaturzonen aufgeteilt, wobei die Teile mittels eines Träger Gestellen, Kettenbahn oder Greifer (4 und 6) durch den Ofen befördert werden, wobei die Bauteile dann mit bereichsweisen unterschiedlichen Anlasstemperaturen angelassen werden.The tempering furnace (preferably jet heating) is divided into several separately controllable temperature zones, wherein the parts by means of a carrier racks, chain conveyor or gripper ( 4 and 6 ) are conveyed through the furnace, the components then being tempered with zone-wise different tempering temperatures.

Des Weiteren ist es möglich, auch nur einen Teil-Bereich der jeweiligen erforderlichen Anlasstemperatur auszusetzen (5)Furthermore, it is possible to suspend only a part of the respective required tempering temperature ( 5 )

Komplettes Anlassen von pressgehärteten oder warmumgeformten Bauteilen:Complete tempering of press-hardened or hot-formed components:

Die Bauteile werden mittels Trägergestellen durch einen Ofen (z.B. Jet Heating Ofen) oder an einer Kettenbahn befestigt durch den Ofen befördert. Die Bauteile können jedoch auch auf Trägerschubladen abgelegt, auf fahrbaren Trägergestellen, in containerförmige Anlassöfen eingefahren werden.The components are made by means of support racks transported through an oven (eg Jet Heating Furnace) or attached to a chain conveyor through the oven. However, the components can also be stored on carrier drawers, retracted on mobile support racks, in container-shaped tempering ovens.

Die Bau-Teile werden dann im Ofen auf Temperaturen zwischen 100° und 600° Grad (abhängig nach den jeweiligen Anforderungen an die Bauteile) angelassen.The Construction parts are then heated in the oven to temperatures between 100 ° and 600 ° degrees (depending on the particular requirements on the components) annealed.

Das erfindungsgemäße Verfahren lässt sich insbesondere vorteilhaft für Blechbauteile einsetzen, welche in Crash-Strukturen von Fahrzeugkarosserien eingesetzt werden. Dort kann es auf Grund einer geometrischen Vorgabe zwingend notwendig sein, eine bestimmte Geometrie zu realisieren. Diese Geometrie kann aber im Crash-Fall eine ungünstige sein, so dass bei einem durchgehärteten gleichmäßig ausgehärteten Bauteil im Crash-Fall beispielsweise in engen Radien und/oder in Ziehbe reichen mit großer Ziehtiefe Risse entstehen können. Solche Risse können zum Versagen des Bauteiles im Crash-Fall führen. Mit dem erfindungsgemäßen Verfahren gelingt es, derart kritische Bereiche, welche beispielsweise durch eine Crash-Simulation ermittelt werden können, mit definierten, zäheren Werkstoffeigenschaften zu versehen, so dass im Unfall-Fall ausreichend hohe Kräfte durch den kritischen Karosserieteilbereich aufgenommen werden können, ohne zu reißen. Somit ermöglicht die Erfindung also zum einen eine Crash-optimierte Anpassung vorgegebener Geometriestrukturen. Zum anderen können gegebenenfalls unterschiedliche Geometrien bei vorgegebenem Crash-Verhalten realisiert werden, die bislang noch nicht ermöglicht sind.The inventive method in particular advantageous for Insert sheet metal components, which are used in crash structures of vehicle bodies become. There it may be mandatory due to a geometric specification be necessary to realize a certain geometry. This geometry but in the case of a crash it can be unfavorable so that when a through hardened evenly cured component in the event of a crash, for example, in tight radii and / or in Ziehbe rich with big ones Draw depth cracks can arise. Such cracks can lead to failure of the component in the event of a crash. With the method according to the invention succeeds in such critical areas, which, for example, by a crash simulation can be determined with defined, tougher Provide material properties, so that in case of accident sufficient high forces can be absorbed by the critical body part area, without to tear. Thus allows The invention thus on the one hand a crash-optimized adaptation of predetermined geometry structures. For another possibly different geometries for a given crash behavior be realized, which are not yet possible.

Claims (1)

Verfahren zum gezielten Einstellen einer definierten Härte und/oder einer definierten Festigkeit und/oder einer definierten Duktilität von pressgehärteten und/oder warmumgeformten Bauteilen, wobei definierte Bereiche oder Teilbereiche der Bauteile mittels einer Abdeckeinrichtung oder einer Abschirmeinrichtung abgedeckt und/oder abgeschirmt werden, anschließend nach dem Abschirmen oder Abdecken werden die Bauteile in einen Temperierofen verbracht, wobei im Temperierofen mittels des Temperierofens und der Abdeck- bzw. Abschirmungseinrichtungen in den definierten Bereichen eine vordefinierte Temperatur und/oder ein vordefinierter Temperaturbereich und/oder ein vordefinierter Temperaturverlauf eingestellt wird.Method for targeted setting of a defined Hardness and / or a defined strength and / or a defined ductility of press-hardened and / or hot-formed components, defined areas or partial areas the components by means of a cover or a shielding device covered and / or shielded, then after shielding or Covering the components are spent in a tempering furnace, wherein in the tempering by means of the tempering furnace and the cover or Shielding devices in the defined areas a predefined Temperature and / or a predefined temperature range and / or a predefined temperature profile is set.
DE102006054389.0A 2006-11-17 2006-11-17 Method for the specific generation of a defined hardness and / or a defined strength of press-hardened and / or hot-formed and / or directly and / or indirectly formed sheet metal components Active DE102006054389B4 (en)

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Cited By (11)

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WO2010089103A1 (en) * 2009-02-03 2010-08-12 Magna Ihv Gesellschaft Für Innenhochdruckverfahren Mbh Method and furnace for making a metal workpiece with regions of different ductility
EP2322672A1 (en) * 2008-08-08 2011-05-18 Aisin Takaoka Co., Ltd. Heating device and heating method
EP2336374A1 (en) * 2009-12-16 2011-06-22 Schwartz, Eva Method and device for heating and partially cooling workpieces in a continuous furnace
CN102191362A (en) * 2010-03-04 2011-09-21 基尔霍夫汽车德国有限责任公司 Method for producing a molded part
DE102010050160A1 (en) * 2010-10-30 2012-05-03 Volkswagen Ag Method for influencing crack configuration of overload crack in surface or profile component made from steel of motor car, involves introducing local structural changes in area of free surfaces of vehicle part based on crack configuration
DE102011101991B3 (en) * 2011-05-19 2012-08-23 Volkswagen Aktiengesellschaft Heat treatment of hardenable sheet metal components
EP2548975A1 (en) * 2011-07-20 2013-01-23 LOI Thermprocess GmbH Method and device for producing a hardened metallic component with at least two areas of different ductility
EP2691550A2 (en) 2011-03-30 2014-02-05 Tata Steel Nederland Technology B.V. Method of heat treating a coated metal strip and heat treated coated metal strip
JP2014147963A (en) * 2013-02-01 2014-08-21 Aisin Takaoka Ltd Method for infrared-heating steel sheet, hot forming method, infrared furnace, and part for vehicle
WO2014173703A1 (en) * 2013-04-25 2014-10-30 N. Bättenhausen Indrustrielle Wärme- Und Elektrorechnik Gmbh Device for press hardening components
DE102013011572A1 (en) 2013-07-10 2015-01-15 Audi Ag Method for local and distortion-free heat treatment of sheet metal or sheet-like components by local resistance heating

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DE102017110864B3 (en) 2017-05-18 2018-10-18 Voestalpine Metal Forming Gmbh Method and device for producing hardened sheet steel components with different sheet thicknesses

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DE20014361U1 (en) * 2000-08-19 2000-10-12 Benteler Werke Ag B-pillar for a motor vehicle

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EP2322672A4 (en) * 2008-08-08 2012-08-01 Aisin Takaoka Ltd Heating device and heating method
EP2322672A1 (en) * 2008-08-08 2011-05-18 Aisin Takaoka Co., Ltd. Heating device and heating method
US8847126B2 (en) 2008-08-08 2014-09-30 Aisin Takaoka Co., Ltd. Heating device and heating method
WO2010089103A1 (en) * 2009-02-03 2010-08-12 Magna Ihv Gesellschaft Für Innenhochdruckverfahren Mbh Method and furnace for making a metal workpiece with regions of different ductility
EP2336374A1 (en) * 2009-12-16 2011-06-22 Schwartz, Eva Method and device for heating and partially cooling workpieces in a continuous furnace
WO2011082934A1 (en) * 2009-12-16 2011-07-14 Schwartz, Eva Method and device for heating and partially cooling work pieces in a continuous furnace
CN102191362A (en) * 2010-03-04 2011-09-21 基尔霍夫汽车德国有限责任公司 Method for producing a molded part
CN102191362B (en) * 2010-03-04 2015-08-19 基尔霍夫汽车德国有限责任公司 For the production of the method for drip molding
DE102010050160A1 (en) * 2010-10-30 2012-05-03 Volkswagen Ag Method for influencing crack configuration of overload crack in surface or profile component made from steel of motor car, involves introducing local structural changes in area of free surfaces of vehicle part based on crack configuration
EP2691550A2 (en) 2011-03-30 2014-02-05 Tata Steel Nederland Technology B.V. Method of heat treating a coated metal strip and heat treated coated metal strip
DE102011101991B3 (en) * 2011-05-19 2012-08-23 Volkswagen Aktiengesellschaft Heat treatment of hardenable sheet metal components
WO2012156084A1 (en) 2011-05-19 2012-11-22 Volkswagen Aktiengesellschaft Heat treatment of hardenable sheet metal components
EP2548975A1 (en) * 2011-07-20 2013-01-23 LOI Thermprocess GmbH Method and device for producing a hardened metallic component with at least two areas of different ductility
JP2014147963A (en) * 2013-02-01 2014-08-21 Aisin Takaoka Ltd Method for infrared-heating steel sheet, hot forming method, infrared furnace, and part for vehicle
WO2014173703A1 (en) * 2013-04-25 2014-10-30 N. Bättenhausen Indrustrielle Wärme- Und Elektrorechnik Gmbh Device for press hardening components
US10590500B2 (en) 2013-04-25 2020-03-17 N. Bättenhausen Industrielle Wärme- und Elektrotechnik GmbH Apparatus for the press hardening of components
DE102013011572A1 (en) 2013-07-10 2015-01-15 Audi Ag Method for local and distortion-free heat treatment of sheet metal or sheet-like components by local resistance heating

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