EP1885894B1 - Verfahren zur chargenweisen wärmebehandlung von glühgut - Google Patents

Verfahren zur chargenweisen wärmebehandlung von glühgut Download PDF

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Publication number
EP1885894B1
EP1885894B1 EP06721250A EP06721250A EP1885894B1 EP 1885894 B1 EP1885894 B1 EP 1885894B1 EP 06721250 A EP06721250 A EP 06721250A EP 06721250 A EP06721250 A EP 06721250A EP 1885894 B1 EP1885894 B1 EP 1885894B1
Authority
EP
European Patent Office
Prior art keywords
impurities
gas
protective gas
annealing
loaded
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.)
Active
Application number
EP06721250A
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German (de)
English (en)
French (fr)
Other versions
EP1885894A1 (de
Inventor
Peter Dipl.-Ing. Ebner
Heribert Dipl.-Ing. Lochner
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.)
Ebner Industrieofenbau GmbH
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Ebner Industrieofenbau GmbH
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Priority to PL06721250T priority Critical patent/PL1885894T3/pl
Publication of EP1885894A1 publication Critical patent/EP1885894A1/de
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Publication of EP1885894B1 publication Critical patent/EP1885894B1/de
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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
    • C21D1/76—Adjusting the composition of the atmosphere
    • 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

Definitions

  • the invention relates to a method for the batchwise heat treatment of Glühgut, which is heated in a Glsweepingaum after flushing air with a purge gas under inert gas to a predetermined treatment temperature, wherein the protective gas depending on the accumulation of impurities in different quantities through the annealing space becomes.
  • Metal strips and wires are subjected to recrystallization of a heat treatment under inert gas, which is intended to prevent above all oxidation processes on the surface of the annealing material by atmospheric oxygen.
  • inert gas preferably nitrogen
  • the heat treatment is carried out under an inert gas, for example nitrogen or hydrogen.
  • these impurities are evaporated during the heating of the annealing stock to the treatment temperature during an exhaust steam phase, the evaporated impurities being diluted and flushed out by the inert gas conveyed through the annealing space.
  • the amount of the protective gas delivered through the annealing space is controlled as a function of the respective amount of evaporated impurities. With the increase in surface temperature of the annealing material, the evaporated impurity quantity increases rapidly, and then drops off again after the evaporation of the main amount of impurities, despite increasing surface temperatures.
  • the invention is therefore based on the object, a method of the type described for the heat treatment of Glühgut to design so that the batch-wise required amount of protective gas can be reduced.
  • the invention solves the problem set by the fact that after the main attack of contaminants from the annealing chamber withdrawn, loaded with a residual amount of impurities inert gas is optionally promoted to an intermediate storage during the main attack of impurities in a subsequent batch in the annealing space before unloaded inert gas in the Glow space is initiated.
  • the invention is based on the finding that a correspondingly high degree of purity of the protective gas only at the end of the heat treatment of the annealed material Annealing material is required, so that during the main attack of contaminants also contaminated with such impurities protective gas can be promoted through the annealing space when the load is limited and thus a sufficient dilution effect is ensured.
  • the withdrawn after the main attack of the impurities from the annealing space, loaded with a residual amount of impurities protective gas of a subsequent batch during the main attack of impurities back into the annealing space are promoted, so that a significant portion of the otherwise rejected inert gas from a previous batch be used again and replace part of the otherwise required unloaded inert gas, without affecting the treatment of the annealing.
  • the unloaded inert gas is used only to the extent that at the end of the heat treatment allows a largely free of impurities inert gas atmosphere, as is the case with conventional heat treatments.
  • the withdrawn from a Glroundaum inert gas can be introduced into a further parallel, but with respect to the loading operated in time Gllickaum.
  • the purge gas charged towards the end of the purge cycle may be used during a subsequent batch, with a residual charge of impurities during a subsequent batch depending on whether the purge gas is also used for the purge gas Inert gas is used or not. If, for example, nitrogen is used as rinsing and shielding gas, then the purge gas withdrawn from the annealing space may be at a correspondingly low level of contamination by a residual oxygen content during the the rinsing process following heat treatment are introduced into the annealing space, which is not possible with different gases for flushing and heat treatment.
  • Fig. 1 are provided for the heat treatment of Glühgut, such as metal strip or metal wire coils, Glühsammlung 1, which are charged in batches with the Glühgut.
  • Glühgut such as metal strip or metal wire coils
  • Glühffy 1 which are charged in batches with the Glühgut.
  • These formed for example by hood ovens Glühläume 1 are connected in a conventional manner to a protective gas inlet 2 and a protective gas discharge 3.
  • an exhaust pipe 4 is provided, via which a memory 5 can be loaded, according to the embodiment with the aid of a compressor 6.
  • the storage tank 5 is discharged via a line 7 connected to the convection chambers 1, which is connected via a device 8 for pressure regulation is connected to the memory 5.
  • FIG Fig. 2 a temperature profile T 1 on the Glühgutober Diagram.
  • the curve T 2 indicates the temperature profile inside the annealed material. Due to the surface heating of the annealing vaporizing adhering to the surface of lubricant residues from, according to the curve 9, which illustrates the vaporizing during a Abdampfphase 10 impurity amounts, first the evaporating impurity amounts with the surface temperature T1 increase sharply, then drop because of the increasing surface cleaning and a to approach negligible residual value.
  • the gas discharge from the Glühsted 1 via line 4 can then be used when the load of the withdrawn inert gas below an upper limit m, which is 10% above the average content of impurities in the memory. 5 interposed inert gas is.
  • the loaded inert gas from the memory 5 can then be used for the beginning of the exhaust steam phase 10 of a subsequent batch, in the range of sections d and a of the curve 11. Is the upper limit m for the load of the protective gas to be withdrawn during the Abdampfphase 10 for Time t 1 reached, so in the Fig. 3 hatched indicated amount of inert gas in the memory 5 are stored.
  • a flammable protective gas for example hydrogen
  • the air can not be flushed out of the heating chambers 1 before each annealing by the protective gas, but instead a non-combustible purge gas must be used.
  • this purge gas is indicated by the curve 12.
  • the combustible protective gas before venting the Glühsammlung 1 at the end of the cooling phase by means of a not Flammable purge gas rinse as indicated by the curve 13.
  • the purge gas supply is designated 14. The discharge of the purge gas via the line 15th
  • the invention is of course not limited to the illustrated embodiment. Thus it could be dispensed with the provision of a memory 5, when the charging of the Glühsammlung 1 is offset in time so that the withdrawn from the time t 1 from one of the Glühsammlung 1 protective gas amount is supplied to the other annealing chamber 1, during the main attack of the evaporating Impurities, so that the required amount of inert gas in sections d and a of Fig. 3 can be covered at least partially by the withdrawn from the other annealing chamber 1 inert gas.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Furnace Details (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Tunnel Furnaces (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Control Of Heat Treatment Processes (AREA)
EP06721250A 2005-05-12 2006-05-11 Verfahren zur chargenweisen wärmebehandlung von glühgut Active EP1885894B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06721250T PL1885894T3 (pl) 2005-05-12 2006-05-11 Sposób wsadowej obróbki cieplnej przedmiotów wyżarzanych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0081305A AT502238B1 (de) 2005-05-12 2005-05-12 Verfahren zur chargenweisen wärmebehandlung von glühgut
PCT/AT2006/000194 WO2006119526A1 (de) 2005-05-12 2006-05-11 Verfahren zur chargenweisen wärmebehandlung von glühgut

Publications (2)

Publication Number Publication Date
EP1885894A1 EP1885894A1 (de) 2008-02-13
EP1885894B1 true EP1885894B1 (de) 2008-09-03

Family

ID=36726453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06721250A Active EP1885894B1 (de) 2005-05-12 2006-05-11 Verfahren zur chargenweisen wärmebehandlung von glühgut

Country Status (12)

Country Link
US (1) US7875235B2 (pl)
EP (1) EP1885894B1 (pl)
JP (1) JP5086244B2 (pl)
KR (1) KR20080023289A (pl)
CN (1) CN101203620B (pl)
AT (2) AT502238B1 (pl)
BR (1) BRPI0609230B1 (pl)
DE (1) DE502006001513D1 (pl)
PL (1) PL1885894T3 (pl)
RU (1) RU2398893C2 (pl)
UA (1) UA92173C2 (pl)
WO (1) WO2006119526A1 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010090736A1 (en) 2009-02-04 2010-08-12 Espinosa Thomas M Concrete anchor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347312B3 (de) * 2003-10-08 2005-04-14 Air Liquide Deutschland Gmbh Verfahren zur Wärmebehandlung von Eisenwerkstoffen

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB332656A (en) * 1929-05-03 1930-07-31 Metallgesellschaft Ag Process of and apparatus for bright annealing metals
GB484569A (en) 1936-11-03 1938-05-03 John Lindon Pearson Improvements in and relating to the heat treatment of metals
US2673821A (en) * 1950-11-18 1954-03-30 Midwest Research Inst Heat treatment of steel in a protective atmosphere
JPS5943970B2 (ja) 1981-09-29 1984-10-25 中外炉工業株式会社 雰囲気熱処理炉における装入・抽出ベスチブルのパ−ジ方法
US4648914A (en) * 1984-10-19 1987-03-10 The Boc Group, Inc. Process for annealing ferrous wire
JPS62177126A (ja) * 1986-01-31 1987-08-04 Nisshin Steel Co Ltd 鋼帯の連続焼鈍方法
JP2667528B2 (ja) * 1989-09-01 1997-10-27 大同ほくさん株式会社 ガス回収方法およびそれに用いる装置
FR2660669B1 (fr) * 1990-04-04 1992-06-19 Air Liquide Procede et installation de traitement thermique d'objets avec trempe en milieux gazeux.
JPH0417626A (ja) * 1990-05-11 1992-01-22 Sumitomo Metal Ind Ltd バッチ焼鈍炉における雰囲気ガス制御方法
JPH0441615A (ja) * 1990-06-04 1992-02-12 Komatsu Ltd オーステンパ処理方法および装置
JP2698841B2 (ja) 1992-10-28 1998-01-19 矢崎総業株式会社 低挿入力コネクタ
JPH06306454A (ja) 1993-04-21 1994-11-01 Sumitomo Metal Ind Ltd 熱処理炉雰囲気ガスの再利用方法
DE4336771A1 (de) * 1993-10-28 1995-05-04 Loi Ind Ofenanlagen Verfahren zum Glühen von Glühgut sowie zugehöriger Glühofen
JPH09235619A (ja) * 1996-02-28 1997-09-09 Peter Helmut Ebner フード焼なまし炉
DE19608894A1 (de) * 1996-03-07 1997-09-18 Linde Ag Verfahren zur Schutzgasversorgung eines Wärmebehandlungsofens und Wärmebehandlungsanlage
DE10050673C1 (de) * 2000-10-04 2002-04-18 Kohnle W Waermebehandlung Verfahren zum Anlassen von Werkstücken in einem Ofen unter einer Schutzgasatmoshäre

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347312B3 (de) * 2003-10-08 2005-04-14 Air Liquide Deutschland Gmbh Verfahren zur Wärmebehandlung von Eisenwerkstoffen

Also Published As

Publication number Publication date
CN101203620B (zh) 2010-06-09
BRPI0609230A2 (pt) 2010-03-09
RU2007146147A (ru) 2009-06-20
AT502238A1 (de) 2007-02-15
US20090026666A1 (en) 2009-01-29
EP1885894A1 (de) 2008-02-13
DE502006001513D1 (de) 2008-10-16
JP5086244B2 (ja) 2012-11-28
ATE407226T1 (de) 2008-09-15
BRPI0609230B1 (pt) 2014-02-18
AT502238B1 (de) 2007-12-15
US7875235B2 (en) 2011-01-25
WO2006119526A1 (de) 2006-11-16
JP2008540833A (ja) 2008-11-20
CN101203620A (zh) 2008-06-18
RU2398893C2 (ru) 2010-09-10
KR20080023289A (ko) 2008-03-13
PL1885894T3 (pl) 2009-02-27
UA92173C2 (ru) 2010-10-11

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