EP1367139A2 - Dispositif de traitement thermique et procédé pour actionner ledit dispositif - Google Patents

Dispositif de traitement thermique et procédé pour actionner ledit dispositif Download PDF

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Publication number
EP1367139A2
EP1367139A2 EP03012016A EP03012016A EP1367139A2 EP 1367139 A2 EP1367139 A2 EP 1367139A2 EP 03012016 A EP03012016 A EP 03012016A EP 03012016 A EP03012016 A EP 03012016A EP 1367139 A2 EP1367139 A2 EP 1367139A2
Authority
EP
European Patent Office
Prior art keywords
gas
heat treatment
space
usable space
liquid inert
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Withdrawn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
EP03012016A
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German (de)
English (en)
Other versions
EP1367139A3 (fr
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.)
Schmetz GmbH and Co KG
Original Assignee
Schmetz 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 Schmetz GmbH and Co KG filed Critical Schmetz GmbH and Co KG
Publication of EP1367139A2 publication Critical patent/EP1367139A2/fr
Publication of EP1367139A3 publication Critical patent/EP1367139A3/fr
Withdrawn legal-status Critical Current

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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere

Definitions

  • the invention relates to a heat treatment plant, especially for the heat treatment of metallic Workpieces, with one arranged in a steel housing Usable space, facilities for heating and cooling the Usable space and means for circulating the gas in the Usable space or steel housing and a method for Operating such a facility.
  • Vacuum furnaces with gas quenching in the Vacuum and overpressure are nowadays in the general for a wide variety of heat treatments metallic workpieces.
  • Furnaces with higher gas pressure levels are mainly used for Hardening and tempering the most varied Steel grades used. Ovens with low In contrast, gas pressure levels mainly come into play Vacuum soldering processes, annealing processes and others Heat treatments of metallic batches are used.
  • the ovens are independent of the aforementioned tasks designed for different gas pressure levels.
  • the invention is therefore based on the object known and previously described in more detail Heat treatment plants and a process for their Operate in such a way that they develop and further train made usable for a larger area of application can be. Furthermore, the efficiency of the Cooling system with regard to temperature range and Cooling rate can be increased and thus the economy of the entire system.
  • the utility space is an inlet for a pipe of a liquefied gas, which in a nozzle outlets having evaporation element ends and that the Usable space an outlet for the passage of exhaust gas having.
  • Liquid gases such as liquid inert substances come Nitrogen, argon, helium, neon or krypton in question, as a reactant, for example, hydrogen.
  • the low temperature range is used for "freezing" of steels. It is used in metallurgy Processes such as hardening or tempering. By treatment down to -185 ° C, residual austenite becomes in the more stable hard ones Martensite is transformed during this transformation other smaller carbon particles in the form of carbides released and even in the material mass distributed. These help to support the martensite matrix at, the internal tensions in the treated Workpiece take off.
  • Embodiment is one in one only schematic indicated double-walled cylindrical steel housing 1 arranged usable space 2 with essentially rectangular Outlined. To better illustrate the Invention are the necessary devices for heating and cooling the utility room 2 and means for Circulation of the gas in the usable space 2 or steel housing 1 not shown.
  • the utility space 2 has an inlet 3 for an unspecified line for a liquid gas on that with a corresponding under light pressure upright liquid gas storage (not shown) connected is.
  • a Evaporation element recognizable, which in the Embodiment designed as an evaporation tube 4 is that extends across the entire width of the usable space extends and at its bottom a variety of Has nozzle outlets 5.
  • a corresponding outlet 6 ensures that the exhaust gas escapes from usable space 2 can.
  • an atomizer unit which consists of a heat-resistant impeller 8, that via a shaft with an outside of the usable space 2 arranged drive 9 is connected.
  • inlet 3 and Outlet 6 each one, preferably electromagnetic operable, have valve.
  • the liquid gas is in a (not shown) tank under slight overpressure.
  • an automatically operated intake valve By Opening an automatically operated intake valve the liquid inert substance passes through a feed line and a vacuum and overpressure density (not shown) Feedthrough into the steel housing 1.
  • a vacuum and overpressure density (not shown) Feedthrough into the steel housing 1.
  • Carrying out the liquid nitrogen in the Oven recipients led. From there it arrives via a further supply line in the thermally insulated utility room 2 to actual evaporation element, the evaporation tube 4, outlet openings 5 in the shape of a nozzle via its longitudinal axis are attached.
  • Atomizer unit 7 In the area of the evaporation tube in usable space 2 Atomizer unit 7 is positioned, which essentially consists of there is at least one heat-resistant impeller 8.
  • the liquid nitrogen changes from that Liquidus phase in the gas phase.
  • the necessary warmth becomes the material of usable space 2 and the batch withdrawn, the cooling process is running.
  • the conversion factor of these two states is for Nitrogen at 1 in 700, i.e. from 1 room part (liquid) 700 room parts (gaseous nitrogen).
  • the resulting overpressure can be up to the permissible Boiler pressure can be used.
  • the heated gas exits the outlet 6 from the Usable space 2 and reaches the vacuum and overpressure-tight implementation on the furnace recipient.

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)
  • Furnace Details (AREA)
EP03012016A 2002-05-29 2003-05-28 Dispositif de traitement thermique et procédé pour actionner ledit dispositif Withdrawn EP1367139A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10224129 2002-05-29
DE2002124129 DE10224129B8 (de) 2002-05-29 2002-05-29 Wärmebehandlungsanlage

Publications (2)

Publication Number Publication Date
EP1367139A2 true EP1367139A2 (fr) 2003-12-03
EP1367139A3 EP1367139A3 (fr) 2004-12-29

Family

ID=29414273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03012016A Withdrawn EP1367139A3 (fr) 2002-05-29 2003-05-28 Dispositif de traitement thermique et procédé pour actionner ledit dispositif

Country Status (2)

Country Link
EP (1) EP1367139A3 (fr)
DE (1) DE10224129B8 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2869046A1 (fr) * 2004-04-19 2005-10-21 Francis Pelissier Procede de trempe sous gaz
WO2008155426A1 (fr) * 2007-06-21 2008-12-24 Eliog-Kelvitherm Industrieofenbau Gmbh Four à vide pour le traitement thermique de pièces métalliques, et son procédé d'exploitation
EP2505676A1 (fr) * 2011-03-28 2012-10-03 Ipsen, Inc. Procédé de trempe et appareil de mise en ýuvre dudit procédé

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3127606A1 (de) * 1981-07-13 1983-01-27 László von Dipl.-Phys. 4190 Kleve Körtvélyessy Schutzgasofen mit getrennter begasung
JPS619518A (ja) * 1984-06-22 1986-01-17 Mitsubishi Electric Corp 水素ガス雰囲気炉
US4963091A (en) * 1989-10-23 1990-10-16 Surface Combustion, Inc. Method and apparatus for effecting convective heat transfer in a cylindrical, industrial heat treat furnace

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3946796B2 (ja) * 1996-08-22 2007-07-18 大陽日酸株式会社 サブゼロ処理装置
JPH1081913A (ja) * 1996-09-06 1998-03-31 Ishikawajima Harima Heavy Ind Co Ltd ガス冷却による等温焼き入れ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3127606A1 (de) * 1981-07-13 1983-01-27 László von Dipl.-Phys. 4190 Kleve Körtvélyessy Schutzgasofen mit getrennter begasung
JPS619518A (ja) * 1984-06-22 1986-01-17 Mitsubishi Electric Corp 水素ガス雰囲気炉
US4963091A (en) * 1989-10-23 1990-10-16 Surface Combustion, Inc. Method and apparatus for effecting convective heat transfer in a cylindrical, industrial heat treat furnace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 0101, Nr. 56 (C-351), 5. Juni 1986 (1986-06-05) & JP 61 009518 A (MITSUBISHI DENKI KK), 17. Januar 1986 (1986-01-17) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2869046A1 (fr) * 2004-04-19 2005-10-21 Francis Pelissier Procede de trempe sous gaz
WO2005108629A1 (fr) 2004-04-19 2005-11-17 Francis Pelissier Procede de trempe sous gaz
WO2008155426A1 (fr) * 2007-06-21 2008-12-24 Eliog-Kelvitherm Industrieofenbau Gmbh Four à vide pour le traitement thermique de pièces métalliques, et son procédé d'exploitation
EP2505676A1 (fr) * 2011-03-28 2012-10-03 Ipsen, Inc. Procédé de trempe et appareil de mise en ýuvre dudit procédé
US20120247627A1 (en) * 2011-03-28 2012-10-04 Werner Hendrik Grobler Quenching Process and Apparatus for Practicing Said Process
EP2505676B1 (fr) 2011-03-28 2017-03-01 Ipsen International GmbH Procédé de trempe et appareil de mise en oeuvre dudit procédé
US9617611B2 (en) * 2011-03-28 2017-04-11 Ipsen, Inc. Quenching process and apparatus for practicing said process

Also Published As

Publication number Publication date
DE10224129B4 (de) 2006-11-02
DE10224129A1 (de) 2003-12-18
DE10224129B8 (de) 2007-02-15
EP1367139A3 (fr) 2004-12-29

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