EP1960558A2 - Procédé et appareil de revenu éclair - Google Patents

Procédé et appareil de revenu éclair

Info

Publication number
EP1960558A2
EP1960558A2 EP06851783A EP06851783A EP1960558A2 EP 1960558 A2 EP1960558 A2 EP 1960558A2 EP 06851783 A EP06851783 A EP 06851783A EP 06851783 A EP06851783 A EP 06851783A EP 1960558 A2 EP1960558 A2 EP 1960558A2
Authority
EP
European Patent Office
Prior art keywords
workpiece
temperature
heating
preselected
martensite
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.)
Withdrawn
Application number
EP06851783A
Other languages
German (de)
English (en)
Other versions
EP1960558A4 (fr
Inventor
Tad Machrowicz
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.)
Noble Advanced Technologies Inc
Original Assignee
Noble Advanced Technologies Inc
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 Noble Advanced Technologies Inc filed Critical Noble Advanced Technologies Inc
Publication of EP1960558A2 publication Critical patent/EP1960558A2/fr
Publication of EP1960558A4 publication Critical patent/EP1960558A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • 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
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/34—Methods of heating
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • martensite steels Steels with martensite therein are commonly referred to as martensite steels to those skilled in the art. Martensite steels are hard but brittle. Typical tensile strengths of martensite steels, or in the alternative referred to as martensitic steels, are approximately 220 ksi, their yields are typically 190 ksi, and the percent elongation is approximately 4%. These steels are too brittle for many manufacturing operations, also their high degree of brittleness can limit their utility in particular applications. As such, many applications, including motor vehicle applications, require that martensite steels be tempered so as to improve their elongation characteristics.
  • Tempering has heretofore been carried out by reheating the martensite and/or bainite articles in a tempering furnace or oven. This process is fairly time consuming, hardware intensive, and requires a fairly large amount of dedicated manufacturing space. In some instances tempering has been carried out by the use of induction heating coils. These coils are typically swept across the article to create a heated zone. Such induction heating processes are difficult to control, particularly when the article includes irregular features such as openings, protrusions or the like, which can distort the induction field. Generally induction based processes are not capable of precisely controlling the material properties of the articles being treated, and their utility is limited to applications such as stress-relieving hardened articles.
  • a method for tempering a workpiece includes providing a ferrous alloy workpiece having a martensite and/or bainite phase therein, heating at least a portion of the workpiece to a preselected temperature and then cooling the workpiece to a lower temperature.
  • the preselected temperature is below the austensizing temperature of the alloy and the heating is accomplished in no more than 60 seconds.
  • One embodiment of the present invention heats the workpiece using resistance heating.
  • Figure 1 illustrates a time-temperature curve for a flash tempering operation of the present invention.
  • the amount of heat required to heat the portion of the workpiece being tempered is predetermined. This may be done by calculating the required heat energy on the basis of the known or measured characteristics of the workpiece. In other instances, the amount of heat required may be determined empirically by measuring temperature changes in the workpiece when, or while, heat is being input thereto. In any instance, once the amount of heat required for taking the portion of the workpiece being tempered to an appropriate temperature is determined, that amount of heat may be readily and rapidly input into the workpiece, as for example by flowing a current therethrough or by exposing the workpiece to a flux of electromagnetic energy.
  • the heat is input into the workpiece over a period of time which is no greater than five seconds. In specific instances, the heat energy is input during a period of no more than one second.
  • the present invention may be used to selectively temper portions of a workpiece so as to provide for varied and controlled properties therethrough. For example, a workpiece having a martensitic phase throughout substantially all of its volume may be selectively tempered so that portions of the workpiece will have reduced brittleness and increased elongation properties. In this manner, energy-absorbing structures such as intrusion beams for motor vehicles and the like may be fabricated.
  • the workpiece is optionally held at that temperature and cooled back to ambient temperature so as to complete the tempering process.
  • the cooling rate is not critical from a metallurgical point of view. In those instances where the workpiece is relatively thin, cooling may simply be accomplished by contact with the ambient atmosphere. In other instances, the cooling may be enhanced by flowing a gaseous or liquid fluid across the workpiece. In some particular embodiments of the present invention, heating and cooling may be dynamically balanced to achieve the proper heating profile. For example, a heat pulse may be input into the workpiece, and at some point during the active input of heat, flow of a coolant may be initiated. In other instances, coolant flow may commence after input of the heat pulse.
  • the principles of the present invention are particularly well adapted for tempering relatively thin articles such as frame or body components of motor vehicles or other structural elements both for static and mobile constructions. As such, the present invention has particular advantage for tempering operations carried out on articles having a thickness less than 5 mm and in specific instances less than 2 mm.
  • the process of the present invention may be integrated into other metalworking and treating processes. For example, metal articles are fabricated by a process wherein resistance heating is utilized to raise the temperature of a workpiece to facilitate forming operations. In such instances, the temperature is typically raised above the austenizing temperature so as to soften the metal.
  • Such articles are quenched, typically by contact with a quench fluid so as to form a martensite phase and harden the article.
  • a quench fluid so as to form a martensite phase and harden the article.
  • martensite articles are typically very brittle and of limited utility.
  • a rapid heating process such as resistance or inductive heating
  • the same apparatus which operates to provide heating for the metalworking and martensite formation can be utilized to temper the article by use of the method of the present invention.
  • the system can be programmed to provide an appropriate energy pulse for flash tempering the article.
  • one of skill in the art could readily adapt such apparatus for operation in this mode.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

L'invention concerne un procédé de revenu d'une pièce à usiner. Le procédé comprend les étapes consistant à se procurer une pièce à usiner en alliage ferreux ayant une phase de martensite et/ou de bainite dans celle-ci, chauffer au moins une partie de la pièce à usiner à une température présélectionnée puis refroidir la pièce à usiner à une température inférieure. La température présélectionnée est au-dessous de la température d'austénisation de l'alliage et le chauffage est accompli en pas plus de 60 secondes. Un mode de réalisation de la présente invention comporte le chauffage de la pièce à usiner à l'aide d'un chauffage à résistance.
EP06851783A 2005-12-08 2006-12-08 Procédé et appareil de revenu éclair Withdrawn EP1960558A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US74847305P 2005-12-08 2005-12-08
US11/567,956 US20070131319A1 (en) 2005-12-08 2006-12-07 Flash tempering process and apparatus
PCT/US2006/046774 WO2008048307A2 (fr) 2005-12-08 2006-12-08 Procédé et appareil de revenu éclair

Publications (2)

Publication Number Publication Date
EP1960558A2 true EP1960558A2 (fr) 2008-08-27
EP1960558A4 EP1960558A4 (fr) 2010-09-01

Family

ID=38179691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06851783A Withdrawn EP1960558A4 (fr) 2005-12-08 2006-12-08 Procédé et appareil de revenu éclair

Country Status (6)

Country Link
US (2) US20070131319A1 (fr)
EP (1) EP1960558A4 (fr)
JP (1) JP2009518543A (fr)
KR (1) KR20080089379A (fr)
BR (1) BRPI0620584A2 (fr)
WO (1) WO2008048307A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010005263A1 (de) * 2010-01-20 2011-07-21 Benteler Automobiltechnik GmbH, 33102 Verfahren zur Herstellung eines Bauteils und Vorrichtung zur Durchführung des Verfahrens
DE102010012830B4 (de) 2010-03-25 2017-06-08 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung einer Kraftfahrzeugkomponente und Karosseriebauteil
JP6283925B2 (ja) * 2013-03-08 2018-02-28 高周波熱錬株式会社 ブランク材及び自動車部品の製造方法並びにブランク材及び自動車部品

Citations (9)

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US3271206A (en) * 1962-02-28 1966-09-06 Yawata Iron & Steel Co Short-time heat-treating process for steels
US3929524A (en) * 1973-07-26 1975-12-30 Nikolai Grigorievich Filatov Method of heat treating linear long-length steel articles, apparatus for effecting said method and articles produced thereby
US4050959A (en) * 1974-11-18 1977-09-27 Nippon Kokan Kabushiki Kaisha Process of making a high strength cold reduced steel sheet having high bake-hardenability and excellent non-aging property
US4106957A (en) * 1971-09-02 1978-08-15 N. V. Bekaert S.A. Reinforcements
US4336081A (en) * 1978-04-28 1982-06-22 Neturen Company, Ltd. Process of preparing steel coil spring
JPH01139717A (ja) * 1987-07-29 1989-06-01 Sumitomo Metal Ind Ltd 高温用高Ｃｒフェライト鋼の加工方法
JPH06271929A (ja) * 1993-03-18 1994-09-27 Nippon Steel Corp 急速焼戻しによる高張力鋼板の製造方法
US5672217A (en) * 1990-03-09 1997-09-30 Skf Gmbh Method for producing machine elements of steel
US20010004983A1 (en) * 1997-03-03 2001-06-28 Wiezbowski Michael F. In-situ closed loop temperature control for induction tempering

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US3655465A (en) * 1969-03-10 1972-04-11 Int Nickel Co Heat treatment for alloys particularly steels to be used in sour well service
JPH0236648B2 (ja) * 1983-06-23 1990-08-20 Nisshin Steel Co Ltd Kokyodokoenseikonoseiho
JPS60121222A (ja) * 1983-12-02 1985-06-28 Kawasaki Steel Corp 一方向性珪素鋼板の製造方法
US5009395A (en) * 1985-07-08 1991-04-23 Tocco, Inc. Method and apparatus for selectively heating a workpiece subjected to low temperature thermomechanical processing
US4896626A (en) * 1988-08-24 1990-01-30 Harbor Branch Oceanographic Institution, Inc. Shellfish culture methods and apparatus
JPH06346146A (ja) * 1993-06-07 1994-12-20 Sumitomo Metal Ind Ltd 冷間成形コイルばね用線材の製造方法と装置
US5744773A (en) * 1995-09-19 1998-04-28 Newcor, Inc. Resistance heating process and apparatus
SE9702058L (sv) * 1997-05-30 1998-11-16 Accra Teknik Ab Förfarande för framställning av härdade metalliska hålkroppar av tunnväggig stålplåt genom formblåsning
DE19821797C1 (de) * 1998-05-15 1999-07-08 Skf Gmbh Verfahren zur Herstellung von gehärteten Teilen aus Stahl
DE19849681C1 (de) * 1998-10-28 2000-01-05 Skf Gmbh Verfahren zur Wärmebehandlung von Bauteilen aus Stahl oder Gußeisen
AU3854400A (en) * 1999-06-01 2000-12-18 Mehmet Terziakin Instant heating process with electric current application to the workpiece for high strength metal forming
JP2001192730A (ja) * 2000-01-11 2001-07-17 Natl Research Inst For Metals Ministry Of Education Culture Sports Science & Technology 高Ｃｒフェライト系耐熱鋼およびその熱処理方法
WO2001060542A1 (fr) * 2000-02-17 2001-08-23 Sanoh Kogyo Kabushiki Kaisha Machine a plier
EP1402965B1 (fr) * 2001-05-10 2010-12-01 Neturen Co., Ltd. Procede de fabrication d'un fil d'acier deforme par traitement thermique
GB2376910B (en) * 2001-06-30 2004-06-30 Rolls Royce Plc A method and apparatus for superplastically forming a workpiece
US6868709B2 (en) * 2002-06-13 2005-03-22 Philip Morris Usa Inc. Apparatus and method for thermomechanically forming an aluminide part of a workpiece
JP4223995B2 (ja) * 2004-05-28 2009-02-12 住友電工焼結合金株式会社 鉄系焼結ワークの熱処理方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271206A (en) * 1962-02-28 1966-09-06 Yawata Iron & Steel Co Short-time heat-treating process for steels
US4106957A (en) * 1971-09-02 1978-08-15 N. V. Bekaert S.A. Reinforcements
US3929524A (en) * 1973-07-26 1975-12-30 Nikolai Grigorievich Filatov Method of heat treating linear long-length steel articles, apparatus for effecting said method and articles produced thereby
US4050959A (en) * 1974-11-18 1977-09-27 Nippon Kokan Kabushiki Kaisha Process of making a high strength cold reduced steel sheet having high bake-hardenability and excellent non-aging property
US4336081A (en) * 1978-04-28 1982-06-22 Neturen Company, Ltd. Process of preparing steel coil spring
JPH01139717A (ja) * 1987-07-29 1989-06-01 Sumitomo Metal Ind Ltd 高温用高Ｃｒフェライト鋼の加工方法
US5672217A (en) * 1990-03-09 1997-09-30 Skf Gmbh Method for producing machine elements of steel
JPH06271929A (ja) * 1993-03-18 1994-09-27 Nippon Steel Corp 急速焼戻しによる高張力鋼板の製造方法
US20010004983A1 (en) * 1997-03-03 2001-06-28 Wiezbowski Michael F. In-situ closed loop temperature control for induction tempering

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2008048307A2 *

Also Published As

Publication number Publication date
WO2008048307A2 (fr) 2008-04-24
KR20080089379A (ko) 2008-10-06
WO2008048307A3 (fr) 2008-07-03
EP1960558A4 (fr) 2010-09-01
US20100263770A1 (en) 2010-10-21
BRPI0620584A2 (pt) 2011-11-16
WO2008048307A8 (fr) 2008-08-14
US20070131319A1 (en) 2007-06-14
JP2009518543A (ja) 2009-05-07

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