EP0753587A1 - Plant for hardening and tempering metallic articles - Google Patents

Plant for hardening and tempering metallic articles Download PDF

Info

Publication number
EP0753587A1
EP0753587A1 EP96110951A EP96110951A EP0753587A1 EP 0753587 A1 EP0753587 A1 EP 0753587A1 EP 96110951 A EP96110951 A EP 96110951A EP 96110951 A EP96110951 A EP 96110951A EP 0753587 A1 EP0753587 A1 EP 0753587A1
Authority
EP
European Patent Office
Prior art keywords
furnace
tempering
goods
hardening
cooling
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
EP96110951A
Other languages
German (de)
French (fr)
Other versions
EP0753587B1 (en
Inventor
Hans-Georg Dr.-Ing. Bittner
Hartmut Dipl.-Ing. Weber
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.)
WAERMETECHNIK HEIMSOTH GMBH & CO. KG
Original Assignee
Heimsoth Verwaltungen & Co KG Beteiligungsgesellschaft GmbH
Heimsoth Verwaltungen GmbH and Co 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 Heimsoth Verwaltungen & Co KG Beteiligungsgesellschaft GmbH, Heimsoth Verwaltungen GmbH and Co KG filed Critical Heimsoth Verwaltungen & Co KG Beteiligungsgesellschaft GmbH
Publication of EP0753587A1 publication Critical patent/EP0753587A1/en
Application granted granted Critical
Publication of EP0753587B1 publication Critical patent/EP0753587B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • C21D9/0056—Furnaces through which the charge is moved in a horizontal straight path
    • 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
    • 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
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals

Definitions

  • the invention relates to a device for tempering metallic goods, in particular for tempering tool steels, comprising a furnace for austenitizing the goods, a hardening press for the still hot goods and a tempering furnace for adjusting the hardness and structure of the goods.
  • a device for heat treatment is known: "Heat treatment of structural and tool steels", 3rd ed., Publisher Hans Benninghoff, Sigma series of books, 1978, pp. 451 to 444, Ruhfus, "heat treatment of iron materials", Verlag Stahl Eisen mbH, 1958, pp. 380 to 383 and 386.
  • the invention in particular wants to eliminate these disadvantages and therefore proposes a device that starts from A device of the type mentioned at the outset is characterized in that the tempering furnace is designed as a continuous roller furnace with a preheating area and temperature-maintaining zone and that cooling presses are arranged at the outlet of the roller furnace for the purpose of temperature-controlled cooling of the goods.
  • the tempering machine according to the present invention can on the one hand reduce the starting times to a few minutes and on the other hand each individual piece can be aligned without this leading to additional work processes.
  • the device according to the invention can be used to achieve the same hardness values and, moreover, to provide parts which are much better aligned.
  • the single figure of the drawing shows a schematic longitudinal cross-sectional view of a tempering machine according to the present invention.
  • the actual hardening furnace is designated by 10, it has an input region 11 and a preheating zone 12 and an austenitizing region 13. After leaving the furnace 10, the material reaches the hardening press 20, which works discontinuously. In this press, the goods are slowly and selectively cooled and straightened at the same time.
  • the material reaches the inlet 34 of a tempering furnace 30 from the hardening press.
  • the tempering furnace 30 has a preheating stage 31 and a temperature holding stage 32 and is also equipped with straightening presses 33 in its interior. This means that after the goods have passed the holding stage, they are kept in the straightening press 33 in the furnace for a corresponding period of time under a certain pressure and a certain temperature.
  • the material is then removed from the furnace 30 and, while still warm, cooling presses 40 can be supplied which are located in the immediate vicinity of the outlet of the furnace 30 and cool the material in a defined manner.
  • a roller conveyor passing through the two furnaces is provided, so that the device operates continuously except for the pressing and straightening processes.

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)
  • Forging (AREA)
  • Tunnel Furnaces (AREA)

Abstract

The assembly to quench and temper metallic materials, especially to temper tool steel, has a continuous roller furnace as the temper furnace. It has a preheating zone (31) and a zone (32) where the temp. is maintained. Cooling presses (40) are at the outlet of the roller furnace (30) for temp. controlled cooling of the material.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Vergüten von metallischem Gut, insbesondere zum Anlassen von Werkzeugstählen, aufweisend einen Ofen zum Austenitisieren des Gutes, eine Härtepresse für das noch heiße Gut sowie einen Anlaßofen zwecks Einstellung der Härte und des Gefüges des Gutes. Eine derartige Vorrichtung zur Wärmebehandlung ist bekannt: "Wärmebehandlung der Bau- und Werkzeugstähle", 3. Aufl., Herausgeber Hans Benninghoff, Sigma Fachbuchreihe, 1978, S. 451 bis 444, Ruhfus, "Wärmebehandlung der Eisenwerkstoffe", Verlag Stahl Eisen mbH, 1958, S. 380 bis 383 und 386.The invention relates to a device for tempering metallic goods, in particular for tempering tool steels, comprising a furnace for austenitizing the goods, a hardening press for the still hot goods and a tempering furnace for adjusting the hardness and structure of the goods. Such a device for heat treatment is known: "Heat treatment of structural and tool steels", 3rd ed., Publisher Hans Benninghoff, Sigma series of books, 1978, pp. 451 to 444, Ruhfus, "heat treatment of iron materials", Verlag Stahl Eisen mbH, 1958, pp. 380 to 383 and 386.

Üblicherweise werden lufthärtende Stähle sowie Werkzeugstähle nach dem Härtevorgang wieder angelassen. Die Anlaßtemperatur wird nach gewünschter Endhärte ausgewählt. Das Anlassen dient einerseits dem Einstellen der exakten Härte und des gewünschten Gefüges und andererseits auch als Richtprozeß. Bei bekannten Verfahren werden daher die einzelnen Teile in Stapeln zwischen 10 bis 100 Stück miteinander verspannt und anschließend zwischen drei bis zehn Stunden angelassen.Air-hardening steels and tool steels are usually tempered again after the hardening process. The tempering temperature is selected according to the desired final hardness. The tempering serves on the one hand to set the exact hardness and the desired structure and on the other hand also as a straightening process. In known methods, the individual parts are therefore clamped together in stacks of between 10 and 100 pieces and then left on for between three and ten hours.

Es hat sich hierbei gezeigt, daß bei einem derartigen Vergütungsvorgang eine Reihe von Hilfstätigkeiten durchgeführt werden müssen, die zeitraubend sind. Hierzu gehört vor allen Dingen das Verspannen der einzelnen Teile und das spätere Entnehmen aus dem Stapel. Auch ist ein Anlaßvorgang im Bereich von mehreren Stunden aus zeitlichen Gründen nicht erwünscht.It has been shown here that a number of auxiliary activities which are time-consuming have to be carried out in the case of such a compensation process. Above all, this includes bracing the individual parts and later removing them from the stack. A starting process in the range of several hours is also undesirable for reasons of time.

Die Erfindung will insbesondere diese Nachteile beseitigen und schlägt daher eine Vorrichtung vor, die ausgehend von einer Vorrichtung der eingangs genannten Art dadurch charakterisiert ist, daR der Anlaßofen als kontinuierlicher Rollenofen mit Vorwärmbereich und Temperaturhaltezone ausgebildet ist und daR am Ausgang des Rollenofens Kühlpressen zwecks temperaturgesteuerter Abkühlung des Gutes angeordnet sind.The invention in particular wants to eliminate these disadvantages and therefore proposes a device that starts from A device of the type mentioned at the outset is characterized in that the tempering furnace is designed as a continuous roller furnace with a preheating area and temperature-maintaining zone and that cooling presses are arranged at the outlet of the roller furnace for the purpose of temperature-controlled cooling of the goods.

Es ist zu erkennen, daR bei der Vergütungsmaschine gemäß der vorliegenden Erfindung einerseits die Anlaßzeiten auf einige Minuten herabgesetzt werden können und andererseits jedes einzelne Stück für sich ausgerichtet werden kann, ohne daß dies zu zusätzlichen Arbeitsvorgängen führt. Man kann im Vergleich mit den Ergebnissen bekannter Verfahren mit Hilfe der Vorrichtung gemäß der Erfindung zu den gleichen Härtewerten gelangen und darüber hinaus wesentlich besser ausgerichtete Teile zur Verfügung stellen.It can be seen that the tempering machine according to the present invention can on the one hand reduce the starting times to a few minutes and on the other hand each individual piece can be aligned without this leading to additional work processes. In comparison with the results of known methods, the device according to the invention can be used to achieve the same hardness values and, moreover, to provide parts which are much better aligned.

Es liegt im Rahmen der Erfindung, das alleinige Anlassen ohne Härteofen und ohne Härtepresse durchzuführen. Auch können erfindungsgemäß Werkstücke sowohl vergütet als auch nur angelassen werden.It is within the scope of the invention to carry out the sole annealing without a hardening furnace and without a hardening press. Workpieces according to the invention can also be both quenched and tempered.

Die Erfindung wird nachstehend an Hand der Zeichnung beispielsweise erläutert.The invention is explained below with reference to the drawing, for example.

Die einzige Figur der Zeichnung zeigt eine schematische Längsquerschnittsansicht einer Vergütungsmaschine gemäß der vorliegenden Erfindung.The single figure of the drawing shows a schematic longitudinal cross-sectional view of a tempering machine according to the present invention.

In der Figur ist mit 10 der eigentliche Härteofen bezeichnet, er hat einen Eingabebereich 11 und eine Vorwärmzone 12 und einen Austenitisierungsbereich 13. Nach Verlassen des Ofens 10 gelangt das Gut zu der Härtepresse 20, die diskontinuierlich arbeitet. In dieser Presse wird das Gut langsam und gezielt abgekühlt und gleichzeitig gerichtet.In the figure, the actual hardening furnace is designated by 10, it has an input region 11 and a preheating zone 12 and an austenitizing region 13. After leaving the furnace 10, the material reaches the hardening press 20, which works discontinuously. In this press, the goods are slowly and selectively cooled and straightened at the same time.

Von der Härtepresse gelangt das Gut zum Einlauf 34 eines Anlaßofens 30. Der Anlaßofen 30 hat eine Vorwärmstufe 31 sowie eine Temperaturhaltestufe 32 und ist darüber hinaus noch in seinem Ofeninnenraum mit Richtpressen 33 ausgestattet. Dies bedeutet, daß das Gut, nachdem es die Haltestufe passiert hat, für eine entsprechende Zeitspanne unter einem bestimmten Druck und einer bestimmten Temperatur in der Richtpresse 33 im Ofen gehalten wird. Anschließend wird das Material dem Ofen 30 entnommen und kann in noch warmem Zustand Kühlpressen 40 zugeführt werden, die sich in unmittelbarer Nähe des Auslasses des Ofens 30 befinden und das Gut in definierter Weise abkühlen.The material reaches the inlet 34 of a tempering furnace 30 from the hardening press. The tempering furnace 30 has a preheating stage 31 and a temperature holding stage 32 and is also equipped with straightening presses 33 in its interior. This means that after the goods have passed the holding stage, they are kept in the straightening press 33 in the furnace for a corresponding period of time under a certain pressure and a certain temperature. The material is then removed from the furnace 30 and, while still warm, cooling presses 40 can be supplied which are located in the immediate vicinity of the outlet of the furnace 30 and cool the material in a defined manner.

Bei der Vorrichtung gemäß der Erfindung ist eine durch die beiden Öfen durchlaufende Rollenbahn vorgesehen, so daß die Vorrichtung bis auf die Preß- und Richtvorgänge kontinuierlich arbeitet.In the device according to the invention, a roller conveyor passing through the two furnaces is provided, so that the device operates continuously except for the pressing and straightening processes.

Es besteht die Möglichkeit, das Material nach dem Verlassen der Kühlpressen 40 der weiteren Bearbeitung zuzuführen oder noch einmal erneut zum Einlaß 34 des Ofens 30 zurückzuführen, so daß ein weiterer Anlaßvorgang durchgeführt werden kann. Es ist weiterhin möglich, das Gut, wenn es den Ofen 30 verläßt, direkt zum Einlaß 34 des Ofens zurückzuführen, anstatt es zu den Kühlpressen 40 zu geben.It is possible to feed the material for further processing after leaving the cooling presses 40 or to return it again to the inlet 34 of the furnace 30 so that a further starting process can be carried out. It is also possible to return the product directly to the inlet 34 of the furnace when it leaves the furnace 30, instead of giving it to the cooling presses 40.

Als Beispiel für Produktionsdaten werden folgende Angaben gemacht:
   Werkstoff 1.2003, 75 Cr1 - φ 420 mm x 3,2 mm Vorwärmen im Härterollenofen 10 940oC, 500 sec. Austenitisieren im Härterollenofen 930oC, 180 sec. Abschrecken unter der Härtepresse 20 70 sec, Härte 65 HRC Vorwärmen im Anlaßrollenofen 30 530oC, 500 sec. Auf Temperatur halten und Pressen 550oC, 270 sec. Abkühlen unter der Kühlpresse 40 70 sec. Härte 44 HRC The following information is given as an example of production data:
Material 1.2003, 75 Cr1 - φ 420 mm x 3.2 mm Preheating in the hardening roller furnace 10 940 o C, 500 sec. Austenitizing in the hardening roller furnace 930 o C, 180 sec. Quenching under the hardness press 20 70 sec, hardness 65 HRC Preheating in the starter roller furnace 30 530 o C, 500 sec. Keep at temperature and press 550 o C, 270 sec. Cooling under the cooling press 40 70 sec. Hardness 44 HRC

Claims (2)

Vorrichtung zum Vergüten von metallischem Gut, insbesondere zum Anlassen von Werkzeugstählen, aufweisend einen Ofen zum Austenitisieren des Gutes, eine Härtepresse für das noch heiße Gut sowie einen Anlaßofen zwecks Einstellung der Härte und des Gefüges des Gutes, dadurch gekennzeichnet, daß der Anlaßofen als kontinuierlicher Rollenofen mit Vorwärmbereich (31) und Temperaturhaltezone (32) ausgebildet ist, daß am Ausgang des Rollenofens (30) Kühlpressen (40) zwecks temperaturgesteuerter Abkühlung des Gutes angeordnet sind.Apparatus for tempering metallic goods, in particular for tempering tool steels, comprising a furnace for austenitizing the goods, a hardening press for the still hot goods and a tempering furnace for adjusting the hardness and structure of the goods, characterized in that the tempering furnace is a continuous roller furnace With preheating area (31) and temperature-maintaining zone (32), cooling presses (40) are arranged at the outlet of the roller furnace (30) for the purpose of temperature-controlled cooling of the goods. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß im Rollenofen (30) Richtpressen (33) angeordnet sind.Device according to claim 1, characterized in that straightening presses (33) are arranged in the roller furnace (30).
EP96110951A 1995-07-12 1996-07-06 Plant for hardening and tempering metallic articles Expired - Lifetime EP0753587B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19525342 1995-07-12
DE19525342A DE19525342C1 (en) 1995-07-12 1995-07-12 Device for tempering metallic material

Publications (2)

Publication Number Publication Date
EP0753587A1 true EP0753587A1 (en) 1997-01-15
EP0753587B1 EP0753587B1 (en) 2002-05-08

Family

ID=7766610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110951A Expired - Lifetime EP0753587B1 (en) 1995-07-12 1996-07-06 Plant for hardening and tempering metallic articles

Country Status (3)

Country Link
EP (1) EP0753587B1 (en)
AT (1) ATE217355T1 (en)
DE (2) DE19525342C1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984071A1 (en) * 1998-09-03 2000-03-08 Wärmetechnik Heimsoth GmbH & Co. KG Use of copper alloys for cooled press plates
EP1191111A1 (en) * 2000-09-18 2002-03-27 J:son Härdteknik AB A method and an apparatus for press tempering
FR2827874A1 (en) * 2001-07-27 2003-01-31 Usinor Fabrication of steel components used for production of sub-frame components involves cutting a piece from a steel strip with a given composition, reheating the piece above its austenitizing temperature and anvil tempering
CN110527814A (en) * 2019-10-12 2019-12-03 大连汇程铝业有限公司 A kind of aluminum alloy pre-stretching cut deal roller-bottom type glowing furnace control method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008036237B3 (en) 2008-08-02 2010-01-28 GMT Gesellschaft für metallurgische Technologie- und Softwareentwicklung mbH Method and plant for inline forming, tempering and straightening rod-shaped metal parts
DE102016219761A1 (en) * 2016-10-11 2018-04-12 Volkswagen Aktiengesellschaft Method for producing a hot-formed part

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE412608C (en) * 1922-09-03 1925-05-28 Koll & Cie G M B H Process for tempering and straightening (tensioning) saw blades, planer knives and similar tools
DE887051C (en) * 1944-06-25 1953-08-20 Siemens Ag Device for tempering thin sheets
JPS59129718A (en) * 1983-01-14 1984-07-26 Sankyo Seiki Mfg Co Ltd Continuous press hardening and transferring device
EP0632137A1 (en) * 1993-05-19 1995-01-04 HEIMSOTH VERWALTUNGEN GmbH & CO. KG Beteiligungsgesellschaft Process for the thermal pretreatment of metallic articles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4018566C2 (en) * 1990-06-09 1997-04-24 Nold Ernst Dr Process for changing the shape of tempering, case hardening or precipitation hardening materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE412608C (en) * 1922-09-03 1925-05-28 Koll & Cie G M B H Process for tempering and straightening (tensioning) saw blades, planer knives and similar tools
DE887051C (en) * 1944-06-25 1953-08-20 Siemens Ag Device for tempering thin sheets
JPS59129718A (en) * 1983-01-14 1984-07-26 Sankyo Seiki Mfg Co Ltd Continuous press hardening and transferring device
EP0632137A1 (en) * 1993-05-19 1995-01-04 HEIMSOTH VERWALTUNGEN GmbH & CO. KG Beteiligungsgesellschaft Process for the thermal pretreatment of metallic articles

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HANNS BENNINGHOFF: "Wärmebehandlung der Bau- und Werkzeugstähle", 1978, BAZ BUCHVERLAG, BASEL , CH 3. AUFLAGE, XP002015629 *
HEINRICH RUHFUS: "WÄRMEBEHANDLUNG DER EISENWERKSTOFFE", 1958, VERLAG STAHLEISEN, DÜSSELDORF , DE, XP002015630 *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 251 (C - 252) 16 November 1984 (1984-11-16) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0984071A1 (en) * 1998-09-03 2000-03-08 Wärmetechnik Heimsoth GmbH & Co. KG Use of copper alloys for cooled press plates
EP1191111A1 (en) * 2000-09-18 2002-03-27 J:son Härdteknik AB A method and an apparatus for press tempering
FR2827874A1 (en) * 2001-07-27 2003-01-31 Usinor Fabrication of steel components used for production of sub-frame components involves cutting a piece from a steel strip with a given composition, reheating the piece above its austenitizing temperature and anvil tempering
CN110527814A (en) * 2019-10-12 2019-12-03 大连汇程铝业有限公司 A kind of aluminum alloy pre-stretching cut deal roller-bottom type glowing furnace control method

Also Published As

Publication number Publication date
DE59609179D1 (en) 2002-06-13
ATE217355T1 (en) 2002-05-15
EP0753587B1 (en) 2002-05-08
DE19525342C1 (en) 1997-03-20

Similar Documents

Publication Publication Date Title
EP2012948B1 (en) Method for reshaping metal blanks made of superior and supreme hardness steels
EP0215032B1 (en) Process and installation to permit the assembly line thermo-mechanical working, with little deformation of workpieces; also application of the process
EP1469954B2 (en) Method for producing a hot rolled strip from austenitic rust-resistant steels
EP2297367B9 (en) Method for producing a formed steel part having a predominantly ferritic-bainitic structure
DE1508416C3 (en) Process for the production of steel parts such as bolts, screws, pins and the like.
EP2324938A1 (en) Method and thermal recasting assembly for producing a hardened, thermally recast workpiece
EP2896466A1 (en) Method and device for producing a metal component
WO2010020212A1 (en) Method for mould annealing with intermediate cooling
DE112015004312T5 (en) METHOD FOR PRODUCING A STRUCTURAL COMPONENT THROUGH A THERMOMAGNETIC TEMPERING PROCESS THAT CAUSES LOCALIZED ZONES
EP0753587B1 (en) Plant for hardening and tempering metallic articles
EP0632842B1 (en) Heat treatment process for metal articles
EP2157194B1 (en) Method and assembly for inline reforming, treatment and alignment of rod-shaped metal parts
DE102008022401B4 (en) Process for producing a steel molding having a predominantly bainitic structure
DE1752655B2 (en) PROCESS FOR THE HEAT TREATMENT OF A STEEL WITH AT LEAST 8% CHROME SUITABLE FOR THE MANUFACTURING OF CUTTING TOOLS WITH THIN CUTTING EDGE
DE3528782A1 (en) METHOD FOR PRODUCING AN AGING-RESISTANT STRIP STEEL WITH HIGH COLD FORMABILITY
EP0632137B1 (en) Process for the thermal pretreatment of metallic articles
DE69813975T2 (en) Method for producing a mechanical workpiece with at least one part that has been surface-hardened by induction, and thus produced workpiece
DE2530470C2 (en)
DE3208242C2 (en) Device for low-warpage hardening of steel parts
DE2010125C3 (en) Process for the partial hardening of workpieces or tools
DE2104824A1 (en) Process for the manufacture of rolled steel
EP0067374A2 (en) Method for the thermo-mechanical treatment of hot rolled steel
DE3926459A1 (en) METHOD AND SYSTEM FOR THE PRODUCTION OF THERMOMECHANICALLY TREATED ROLLED STEEL
DD287835A7 (en) METHOD FOR PRODUCING AN ELC STEEL LAYER
WO1999026740A2 (en) Method for producing work pieces

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

17P Request for examination filed

Effective date: 19961219

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WAERMETECHNIK HEIMSOTH GMBH & CO. KG

17Q First examination report despatched

Effective date: 19991215

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20020508

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020508

REF Corresponds to:

Ref document number: 217355

Country of ref document: AT

Date of ref document: 20020515

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 59609179

Country of ref document: DE

Date of ref document: 20020613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020706

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020706

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020731

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020731

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020808

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020808

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020808

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20020508

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20021128

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

Ref document number: 0753587E

Country of ref document: IE

EN Fr: translation not filed
BERE Be: lapsed

Owner name: WARMETECHNIK *HEIMSOTH G.M.B.H. & CO. K.G.

Effective date: 20020731

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030211

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20040201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060803

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080201