EP1348770A1 - Produktionsanlage und Verfahren zur Herstellung von Warmformkleinteilen aus Stahl - Google Patents

Produktionsanlage und Verfahren zur Herstellung von Warmformkleinteilen aus Stahl Download PDF

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Publication number
EP1348770A1
EP1348770A1 EP02006521A EP02006521A EP1348770A1 EP 1348770 A1 EP1348770 A1 EP 1348770A1 EP 02006521 A EP02006521 A EP 02006521A EP 02006521 A EP02006521 A EP 02006521A EP 1348770 A1 EP1348770 A1 EP 1348770A1
Authority
EP
European Patent Office
Prior art keywords
small parts
tunnel
cooling
hot
plant
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Withdrawn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
EP02006521A
Other languages
English (en)
French (fr)
Inventor
Silvio Luigi Remo
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.)
Eco Trading LLC
Original Assignee
Eco Trading LLC
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 Eco Trading LLC filed Critical Eco Trading LLC
Priority to EP02006521A priority Critical patent/EP1348770A1/de
Publication of EP1348770A1 publication Critical patent/EP1348770A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • 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
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • 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
    • 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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted 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
    • C21D1/84—Controlled slow cooling

Definitions

  • the present finding relates to a plant and a procedure for the production of small parts in hot formed steel.
  • the production of small parts in hot formed steel can be performed by hot-pressing and successive hardening heat treatment, followed by successive tempering heat treatment.
  • the object of the present invention is to obviate the problem of prior art by proposing a plant and procedure that make it possible to reduced the power consumption.
  • the plant comprises means 1 suitable to hot-press small parts in steel, typically a pressing heat 1 of the known type.
  • the hot-pressed small parts are delivered from the heat at an average temperature of approximately 900-950°C.
  • Means 2, suitable to perform a first cooling of the small parts delivered from the heat, and means 3 suitable to perform a second cooling to ambient temperature, are provided.
  • the first cooling means 2 perform cooling of the small parts from a temperature of 900-950°C to a temperature of 400-450°C in a time approximately between 50 and 100 seconds, with an average cooling speed between 8 and 12°C/second.
  • the second cooling means 3 perform cooling from the temperature of 400-450°C to ambient temperature at an average cooling speed of 30-50°C/hour.
  • the means 2 suitable to perform the first cooling comprise a tunnel 4, means 5 suitable to convey the small metal parts essentially through the entire length of said tunnel 4, means 6 suitable to create a current of air in the tunnel 4 and means 7 suitable to introduce nebulized water into the tunnel 4.
  • the air and nebulized water are introduced into the tunnel at ambient temperature.
  • the tunnel 4 is 5 metres in length and has an air flow section of 4 dm 2 , the small parts remain in the tunnel for approximately 50 to 100 seconds, the air flow is approximately 40 m 3 /hour and the quantity of nebulized water introduced into the tunnel is approximately 5 m 3 /hour.
  • the small metal parts are delivered from the tunnel at an average temperature of approximately 400-450°C.
  • the tunnel 4 has a rectangular section and the transporting means 5 are composed of a conveyor belt 5, of the known type, arranged inside the tunnel 4, which conveys the small parts essentially along the entire length of the tunnel 4.
  • a special fan 6 is provided, connected at the end of the tunnel into which the small parts, still hot, are fed.
  • a special pump supplies one or more nozzles which nebulize the water at the entrance to the tunnel.
  • the small parts enter the tunnel through a special opening transversal to the axis of the tunnel.
  • the nebulized water rapidly absorbs the heat of the small parts and is delivered from the end of the tunnel, together with the air, in the form of unsaturated vapour.
  • means to regulate the cooling speed of the first means 2 to regulate the speed at which the small metal parts are conveyed inside the tunnel and/or means to regulate the flow of the air current inside said tunnel and/or means to regulate the flow of nebulized water are provided.
  • the second cooling means 3 are suitable to move the small parts in a calm air environment, to perform slow, preferably isothermal, cooling.
  • the means 3 suitable to perform cooling in calm air comprise a hollow cylindrical body 8, with a vertical axis, with a top feed opening 9 and a bottom delivery opening 10.
  • the hollow cylindrical body is divided into a plurality of cylindrical chambers 11 overlapping and connected sequentially by means of openings arranged according to a helical trajectory.
  • Each chamber 11 is provided with a plurality of blades 13 connected to a single rotating shaft 14, suitable to give the small parts a rotatory movement in the opposite direction to said helical trajectory.
  • the two cooling processes give the small parts a fine crystalline structure, essentially of the bainitic type, provided with appreciable hardness and toughness (up to 36 HRC).
  • the plant is particularly suitable for carbon, carbon and boron, alloy and micro-alloy steels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
EP02006521A 2002-03-19 2002-03-19 Produktionsanlage und Verfahren zur Herstellung von Warmformkleinteilen aus Stahl Withdrawn EP1348770A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02006521A EP1348770A1 (de) 2002-03-19 2002-03-19 Produktionsanlage und Verfahren zur Herstellung von Warmformkleinteilen aus Stahl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02006521A EP1348770A1 (de) 2002-03-19 2002-03-19 Produktionsanlage und Verfahren zur Herstellung von Warmformkleinteilen aus Stahl

Publications (1)

Publication Number Publication Date
EP1348770A1 true EP1348770A1 (de) 2003-10-01

Family

ID=27798794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02006521A Withdrawn EP1348770A1 (de) 2002-03-19 2002-03-19 Produktionsanlage und Verfahren zur Herstellung von Warmformkleinteilen aus Stahl

Country Status (1)

Country Link
EP (1) EP1348770A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1911536A1 (de) * 2005-07-14 2008-04-16 JFE Steel Corporation Heissschmiedeeinrichtung
CN113547066A (zh) * 2021-08-14 2021-10-26 东莞市立丞五金制品有限公司 一种冷镦加工系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2048736A (en) * 1979-05-11 1980-12-17 Msp Ind Warm Forging of Connecting Rod Caps
US4714500A (en) * 1984-12-21 1987-12-22 Krupp Stahl Ag Method for thermal treatment of pearlitic rail steels
EP0384181A2 (de) * 1989-02-03 1990-08-29 Hitachi, Ltd. Dampfturbinenrotor und hitzebeständiger Stahl dafür
EP0735150A2 (de) * 1995-03-29 1996-10-02 Toyota Jidosha Kabushiki Kaisha Verfahren zur Herstellung eines Zahnrad aus Gusseisen
WO1999002744A1 (en) * 1997-07-10 1999-01-21 Skf Engineering & Research Centre B.V. Method for performing a heat treatment on metallic rings, and bearing ring thus obtained
WO2001071050A1 (fr) * 2000-03-24 2001-09-27 Kawasaki Steel Corporation Acier non raffine presentant une anisotropie de matiere reduite et une resistance, une tenacite et une usinabilite ameliorees
US20010025674A1 (en) * 1994-07-19 2001-10-04 Voest Alpine Schienen Gmbh & Co. Method for heat-treating profiled rolling stock

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2048736A (en) * 1979-05-11 1980-12-17 Msp Ind Warm Forging of Connecting Rod Caps
US4714500A (en) * 1984-12-21 1987-12-22 Krupp Stahl Ag Method for thermal treatment of pearlitic rail steels
EP0384181A2 (de) * 1989-02-03 1990-08-29 Hitachi, Ltd. Dampfturbinenrotor und hitzebeständiger Stahl dafür
US20010025674A1 (en) * 1994-07-19 2001-10-04 Voest Alpine Schienen Gmbh & Co. Method for heat-treating profiled rolling stock
EP0735150A2 (de) * 1995-03-29 1996-10-02 Toyota Jidosha Kabushiki Kaisha Verfahren zur Herstellung eines Zahnrad aus Gusseisen
WO1999002744A1 (en) * 1997-07-10 1999-01-21 Skf Engineering & Research Centre B.V. Method for performing a heat treatment on metallic rings, and bearing ring thus obtained
WO2001071050A1 (fr) * 2000-03-24 2001-09-27 Kawasaki Steel Corporation Acier non raffine presentant une anisotropie de matiere reduite et une resistance, une tenacite et une usinabilite ameliorees
EP1199375A1 (de) * 2000-03-24 2002-04-24 Kawasaki Steel Corporation Nicht-gefrischter stahl mit verminderter anisotropie und ausgezeichneter festigkeit, zähigkeit und verarbeitbarkeit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1911536A1 (de) * 2005-07-14 2008-04-16 JFE Steel Corporation Heissschmiedeeinrichtung
EP1911536A4 (de) * 2005-07-14 2013-11-06 Jfe Steel Corp Heissschmiedeeinrichtung
CN113547066A (zh) * 2021-08-14 2021-10-26 东莞市立丞五金制品有限公司 一种冷镦加工系统
CN113547066B (zh) * 2021-08-14 2023-10-20 东莞市立丞五金制品有限公司 一种冷镦加工系统

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