WO2006119526A1 - Verfahren zur chargenweisen wärmebehandlung von glühgut - Google Patents
Verfahren zur chargenweisen wärmebehandlung von glühgut Download PDFInfo
- Publication number
- WO2006119526A1 WO2006119526A1 PCT/AT2006/000194 AT2006000194W WO2006119526A1 WO 2006119526 A1 WO2006119526 A1 WO 2006119526A1 AT 2006000194 W AT2006000194 W AT 2006000194W WO 2006119526 A1 WO2006119526 A1 WO 2006119526A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impurities
- annealing
- inert gas
- gas
- purge gas
- Prior art date
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
- C21D1/74—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 protective gas, which is intended to prevent above all oxidation processes on the surface of the annealing material by atmospheric oxygen.
- a heat treatment under protective gas, which is intended to prevent above all oxidation processes on the surface of the annealing material by atmospheric oxygen.
- an incombustible gas preferably nitrogen
- the heat treatment is carried out under an inert gas, for example nitrogen or hydrogen. Since lubricant residues usually adhere to the annealing stock, 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.
- the increase in surface temperature rature of the annealing material initially increases the evaporated impurity amount rapidly, and then drop after evaporation of the main amount of impurities despite increasing surface temperatures again.
- 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 following 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 Glandaum inert gas can be introduced into a parallel, but with respect to the time-shifted combustion chamber operated.
- the purge gas charged towards the end of the purge cycle can only be used during a subsequent charge, whereby it depends on the residual charge of impurities during a subsequent charge for the use of this purge gas, whether the purge gas as 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. 2 shows the temperature profile of the annealing material over the treatment time at the Gutober Structure and Gutinneren and the resulting accumulation of evaporating impurities and
- annealing spaces 1 are provided for the heat treatment of annealed material, for example metal strip or metal wire bundles, which are charged batchwise with the annealed material. These are formed, for example, by hood ovens.
- Deten Glühffy 1 are connected in a conventional manner to a protective gas inlet 2 and to a protective gas discharge 3.
- an exhaust gas line 4 is provided, via which a reservoir 5 can be charged, specifically according to the exemplary embodiment with the aid of a compressor 6.
- the reservoir 5 is discharged via a line 7 connected to the convection chambers 1, which device 8 for pressure control with the memory 5 is connected.
- the result is a temperature profile Ti at the annealing material surface according to FIG. 2.
- 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 ti reached, so the hatched in Fig. 3 indicated the amount of inert gas can be stored in the memory 5.
- 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 inlet 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 loading of the Glühsammlung 1 is offset in time so that from the time tt from one of the Glühsammlung 1 withdrawn inert gas 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 at least partially covered by the amount of inert gas withdrawn from the respective other hot chamber 1.
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)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06721250A EP1885894B1 (de) | 2005-05-12 | 2006-05-11 | Verfahren zur chargenweisen wärmebehandlung von glühgut |
AT06721250T ATE407226T1 (de) | 2005-05-12 | 2006-05-11 | Verfahren zur chargenweisen wärmebehandlung von glühgut |
DE502006001513T DE502006001513D1 (de) | 2005-05-12 | 2006-05-11 | Verfahren zur chargenweisen wärmebehandlung von glühgut |
US11/919,689 US7875235B2 (en) | 2005-05-12 | 2006-05-11 | Method for batchwise heat treatment of goods to be annealed |
PL06721250T PL1885894T3 (pl) | 2005-05-12 | 2006-05-11 | Sposób wsadowej obróbki cieplnej przedmiotów wyżarzanych |
CN2006800158254A CN101203620B (zh) | 2005-05-12 | 2006-05-11 | 分批热处理退火产品的方法 |
JP2008510351A JP5086244B2 (ja) | 2005-05-12 | 2006-05-11 | 焼きなまし部材を回分操業式に熱処理する方法 |
BRPI0609230-6A BRPI0609230B1 (pt) | 2005-05-12 | 2006-05-11 | Processo para o tratamento térmico em batelada de material de recozimento |
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 |
ATA813/2005 | 2005-05-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006119526A1 true WO2006119526A1 (de) | 2006-11-16 |
Family
ID=36726453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2006/000194 WO2006119526A1 (de) | 2005-05-12 | 2006-05-11 | Verfahren zur chargenweisen wärmebehandlung von glühgut |
Country Status (12)
Country | Link |
---|---|
US (1) | US7875235B2 (de) |
EP (1) | EP1885894B1 (de) |
JP (1) | JP5086244B2 (de) |
KR (1) | KR20080023289A (de) |
CN (1) | CN101203620B (de) |
AT (2) | AT502238B1 (de) |
BR (1) | BRPI0609230B1 (de) |
DE (1) | DE502006001513D1 (de) |
PL (1) | PL1885894T3 (de) |
RU (1) | RU2398893C2 (de) |
UA (1) | UA92173C2 (de) |
WO (1) | WO2006119526A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010090736A1 (en) | 2009-02-04 | 2010-08-12 | Espinosa Thomas M | Concrete anchor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB484569A (en) * | 1936-11-03 | 1938-05-03 | John Lindon Pearson | Improvements in and relating to the heat treatment of metals |
JPS5855523A (ja) * | 1981-09-29 | 1983-04-01 | 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 |
US5158625A (en) * | 1990-04-04 | 1992-10-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and apparatus for heat treating articles while hardening in gaseous medium |
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 |
Family Cites Families (13)
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 |
US2673821A (en) * | 1950-11-18 | 1954-03-30 | Midwest Research Inst | Heat treatment of steel in a protective atmosphere |
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 |
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 |
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 |
DE10347312B3 (de) * | 2003-10-08 | 2005-04-14 | Air Liquide Deutschland Gmbh | Verfahren zur Wärmebehandlung von Eisenwerkstoffen |
-
2005
- 2005-05-12 AT AT0081305A patent/AT502238B1/de not_active IP Right Cessation
-
2006
- 2006-05-11 JP JP2008510351A patent/JP5086244B2/ja not_active Expired - Fee Related
- 2006-05-11 UA UAA200712790A patent/UA92173C2/ru unknown
- 2006-05-11 DE DE502006001513T patent/DE502006001513D1/de active Active
- 2006-05-11 RU RU2007146147/02A patent/RU2398893C2/ru not_active IP Right Cessation
- 2006-05-11 BR BRPI0609230-6A patent/BRPI0609230B1/pt not_active IP Right Cessation
- 2006-05-11 AT AT06721250T patent/ATE407226T1/de active
- 2006-05-11 PL PL06721250T patent/PL1885894T3/pl unknown
- 2006-05-11 KR KR1020077026100A patent/KR20080023289A/ko active Search and Examination
- 2006-05-11 EP EP06721250A patent/EP1885894B1/de active Active
- 2006-05-11 CN CN2006800158254A patent/CN101203620B/zh not_active Expired - Fee Related
- 2006-05-11 US US11/919,689 patent/US7875235B2/en not_active Expired - Fee Related
- 2006-05-11 WO PCT/AT2006/000194 patent/WO2006119526A1/de active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB484569A (en) * | 1936-11-03 | 1938-05-03 | John Lindon Pearson | Improvements in and relating to the heat treatment of metals |
JPS5855523A (ja) * | 1981-09-29 | 1983-04-01 | 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 |
US5158625A (en) * | 1990-04-04 | 1992-10-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and apparatus for heat treating articles while hardening in gaseous medium |
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 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 143 (C - 172) 22 June 1983 (1983-06-22) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 02 31 March 1995 (1995-03-31) * |
Also Published As
Publication number | Publication date |
---|---|
EP1885894B1 (de) | 2008-09-03 |
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 |
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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