EP1076103A2 - Verfahren und Vorrichtung zum Waermebehandeln von Blechen - Google Patents
Verfahren und Vorrichtung zum Waermebehandeln von Blechen Download PDFInfo
- Publication number
- EP1076103A2 EP1076103A2 EP00116544A EP00116544A EP1076103A2 EP 1076103 A2 EP1076103 A2 EP 1076103A2 EP 00116544 A EP00116544 A EP 00116544A EP 00116544 A EP00116544 A EP 00116544A EP 1076103 A2 EP1076103 A2 EP 1076103A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- zones
- nozzle
- sheets
- stand
- quette
- 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
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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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray 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
- 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
-
- 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
- C21D2221/00—Treating localised areas of an article
Definitions
- This process is used when tempering heavy plates.
- the sheets will hardened by quenching and tempered in the further course of tempering. You can find them, for example, in shipbuilding, construction, piping and container construction Use or also for the production of parts with a particularly high Wear, e.g. B. excavator shovels.
- the thickness of the sheets can be 60 mm and more. Also the thickness of the sheets can be be much smaller, namely less than 10 mm and also less than 5 mm.
- the invention is therefore based on the object, in particular the heat treatment of thin and very thin sheets to less than 5 mm in such a way that after the hardening of sheets of excellent flatness, which is followed by cold straightening make redundant.
- the method mentioned at the outset is thereby according to the invention characterized in that the top and bottom of the sheets each in a plurality of Zones are divided and that the zones with different speeds and / or intensity and / or duration and / or quenched at different times become.
- the invention is based on the knowledge that the distortion of the sheets during hardening So far it was due to the fact that the different structural changes were not have been sufficiently taken into account.
- the sheets Before hardening, the sheets are heated to approx. 940 ° C heated to achieve an austenitic structure. When quenched, martensite is formed, which results in an enlarged structure. If the quenching is uneven, this enlargement of the structure cannot be compensated for.
- the sheet metal with a small thickness of less than 10 mm have considerable dimensions, for example 14 mx 3.5 m.
- the material undulates in the middle; at a faster edge cooling results in edge waves.
- the invention offers the possibility of optimally taking into account the respective conditions, where the decisive parameters from the material analysis, the thickness dependency and the width dependency result. Furthermore, the conditions on the The top and bottom of the sheets must be taken into account separately. Result it different conditions for the middle, the sides, the corners and the front and rear end areas.
- the flexibility of the invention The procedure takes these circumstances into account. The procedure is particularly suitable for the treatment of thin sheets, but is an advantage also applicable to thick sheets.
- the quenching rate is preferably determined in each case by the amount of water Area and time unit and / or set by the water temperature.
- the quenching intensity can be determined by the spray distance above and below of the sheet can be adjusted. For a given nozzle angle, you can use this Generate different spray patterns.
- the spray distances can change during of the deterrent change to account for the respective operating conditions wear. An influence that differs from zone to zone is also possible, however also with considerable effort.
- the geometrical configuration and arrangement of the zones can also be the same Take into account quenching parameters. It has proven to be advantageous if the zones extend in the transport direction of the sheets, whereby to take into account that the sheets are transported aligned in the longitudinal direction. Three zones oriented in the direction of transport have proven to be particularly favorable proven.
- the zones can also extend transversely to the direction of transport, specifically in particular in such a way that a longitudinal and transverse pattern is created. Also in The transverse direction is advantageously worked with three zones.
- the method according to the invention can take into account another effect: results from the transport of the sheets.
- the sheets leave the furnace at approx. 940 ° C.
- An effective quenching process should begin as soon as possible. But there are limits to this through the transport system.
- the rear end leaves the furnace clearly later than the front end, even if at high transport speeds of approx. 120 m / min.
- the front sheet end up to a standstill on the roller conveyor of the stand quette, a significantly higher number overflowed with rollers than the rear sheet end.
- the result is the front one Sheet end significantly cooler than the rear sheet end.
- the temperature difference can can be 100 K.
- the temperature preferably increases in the direction of transport. It follows after Transport and at the beginning of the quenching process an almost constant Sheet temperature over the sheet length.
- Each batch can consist of a single sheet metal sheet or of secondary and / or individual sheets arranged one behind the other. Wear the treatment parameters the respective sheet geometry and assignment. The parameters are in saved on a computer and can be called up as required.
- the invention is also directed to a stand quette for batch quenching of heated sheets, with a roller table and a plurality of nozzles that arranged above and below the roller table and with interposition of control means are connected to a water supply.
- This standquette is to achieve the object according to the invention characterized in that the nozzles are combined into nozzle zones and that the nozzles of each zone in Parallel connection to the control means are connected.
- the stand quette according to the invention enables the quenching process to be carried out variably and thus a practice of the method according to the invention.
- the nozzles are preferably formed by nozzle tubes which are transverse to the direction of transport extend of the roller conveyor and in sealed against each other, separately pipe sections connected to the control means are divided. It is advantageous to provide three pipe sections and the middle pipe section via one to be connected to the control means by one of the pipes leading to the side of the pipe.
- the upper nozzles can be activated while lowering the upper Quettenrahmen be switched on.
- the desired spray pattern is achieved in this way.
- spraying only begins when the nozzles have a predetermined distance have reached above the sheets.
- their deterrence lasts only a few seconds, the first phase of the quenching process is special Importance.
- the invention is further developed proposed the lifting height of the upper Quettenrahmen depending on the To control the thickness of the sheet to be quenched. So if very thin sheets are processed, so it is no longer necessary to raise the upper Quettenrahmen so high as would be required for example with sheets with a thickness of 60 mm. Rather, a lifting height is sufficient to enable the thin sheets to be retracted. The The lowering process of the Quettenrahmen is thus reduced to a minimum in time that the quenching process can be started early.
- the stand quette be a device upstream to the defined alignment of the sheets in order to disturb the zone and Avoid grouping when spraying the water. Usually will this device is already upstream of the furnace.
- the invention includes a chambered spherical roller hearth heating system with a stand quette according to the invention.
- Such heating systems are operated batch or batch.
- the chamber is a roller hearth, the Rollers are constantly moving for reasons of stability, so that a pendulum movement arises.
- With such a heating system in contrast to a continuous one operated continuous heating system zones with different temperatures be set up.
- the sheet is divided into nine zones on its top and bottom, which in turn are grouped into four groups, namely group 8 with two zones front / outside and two zones rear / outside, group 4 with two zones Center / outside, group 1 with a zone in front / center and a zone in the back / center, as well Group 3 with a central zone. All zones of each group are on the Quenched based on common parameters.
- the division of the bottom corresponds that of the top, these groups can be controlled differently than that of the Top.
- Figure 2 shows a nozzle tube, which in three mutually sealed tube sections 11, 12 and 13 is divided.
- the pipe sections are via separate lines connected to control means, not shown, namely the pipe section 11 via a line 14, the pipe section 12 via a line 15 and the pipe section 13 via a line 16.
- the line 15 leads through the pipe section 13.
- the individual pipe sections can therefore be controlled separately.
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 Strip Materials And Filament Materials (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
Abstract
Description
- in einem Ofen erwärmt,
- aus dem Ofen in eine Standquette transportiert und
- in der Standquette durch Besprühen ihrer Ober- und Unterseite mit Wasser abgeschreckt werden.
- zwei Zonen vorne/außen und zwei Zonen hinten/außen,
- zwei Zonen Mitte/außen,
- eine Zone vorne/Mitte und eine Zone hinten/Mitte,
- eine Zone Mitte.
Claims (24)
- Verfahren zum Wärmebehandeln von Blechen, wobei die Bleche chargenweisein einem Ofen erwärmt,aus dem Ofen in eine Standquette transportiert undin der Standquette durch Besprühen ihrer Ober- und Unterseite mit Wasser, abgeschreckt werden,
daß die Ober- und Unterseite der Bleche je in eine Mehrzahl von Zonen unterteilt werden und daß die Zonen mit unterschiedlicher Geschwindigkeit und/oder Intensität und/oder Dauer und/oder zeitlich versetzt zueinander abgeschreckt werden. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Abschreckgeschwindigkeit jeweils durch die Wassermenge pro Fläche und Zeiteinheit eingestellt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Abschreckgeschwindigkeit jeweils durch die Wassertemperatur eingestellt wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Abschreckintensität jeweils durch den Sprühabstand eingestellt wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sich die Zonen in Transportrichtung der Bleche erstrecken.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die Ober- und Unterseite der Bleche je in drei sich in Transportrichtung erstreckende Zonen unterteilt werden.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sich die Zonen quer zur Transportrichtung erstrecken.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die Ober- und Unterseite der Bleche je in drei sich quer zur Transportrichtung erstreckende Zonen unterteilt werden.
- Verfahren nach einem der Anspruch 1 bis 8, dadurch gekennzeichnet, daß mehrere Zonen der Ober- und/oder der Unterseite der Bleche zu einer oder mehreren Zonengruppen zusammengefaßt werden, wobei die Zonen jeder Zonengruppe nach gemeinsamen Parametern abgeschreckt werden.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die Ober- und/oder Unterseite der Bleche je in neun Zonen unterteilt werden, die je zu vier Zonengruppen zusammengefaßt werden, nämlichzwei Zonen vorne/außen und zwei Zonen hinten/außen,zwei Zonen Mitte/außen,eine Zone vorne/Mitte und eine Zone hinten/Mitte,eine Zone Mitte.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Zonen im Ofen unterschiedlich erwärmt werden.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß die Temperatur im Ofen in Transportrichtung zunimmt.
- Standquette zum chargenweisen Abschrecken von erwärmten Blechen, mit einem Rollengang und einer Mehrzahl von Düsen, die oberhalb und unterhalb des Rollengangs angeordnet und unter Zwischenschaltung von Steuermitteln an eine Wasserversorgung angeschlossen sind, dadurch gekennzeichnet, daß die Düsen zu Düsenzonen zusammengefaßt sind und daß die Düsen jeder Düsenzone in Parallelschaltung an die Steuermittel angeschlossen sind.
- Standquette nach Anspruch 13, dadurch gekennzeichnet, daß sich die Düsenzonen in Transportrichtung des Rollenganges erstrecken.
- Standquette nach Anspruch 14, dadurch gekennzeichnet, daß die oberhalb und unterhalb des Rollenganges angeordneten Düsen je zu drei sich in Transportrichtung des Rollenganges erstreckenden Düsenzonen zusammengefaßt sind.
- Standquette nach einem der Ansprüche 13 bis 15, dadurch gekennzeichnet, daß sich die Düsenzonen quer zur Transportrichtung des Rollengangs erstrecken.
- Standquette nach Anspruch 16, dadurch gekennzeichnet, daß die oberhalb und unterhalb des Rollenganges angeordneten Düsen je zu drei sich quer zur Transportrichtung des Rollenganges erstreckenden Düsenzonen zusammengefaßt sind.
- Standquette nach einem der Ansprüche 13 bis 17, dadurch gekennzeichnet, daß mehrere der oberhalb und/oder unterhalb des Rollenganges angeordneten Düsenzonen zu Düsenzonengruppen zusammengefaßt sind, wobei die Düsenzonen jeder Düsenzonengruppe in Parallelschaltung an die Steuermittel angeschlossen sind.
- Standquette nach Anspruch 18, dadurch gekennzeichnet, daß die oberhalb und unterhalb des Rollenganges angeordneten Düsen je zu neun Düsenzonen zusammengefaßt sind, die ihrerseits je vier Düsenzonengruppen bilden, nämlichzwei Düsenzonen vorne/außen und zwei Düsenzonen hinten/außen,zwei Düsenzonen Mitte/außen,eine Düsenzone vorne/Mitte und eine Düsenzone hinten/Mitte,eine Düsenzone Mitte.
- Standquette nach einem der Ansprüche 13 bis 19, dadurch gekennzeichnet, daß die Düsen von Düsenrohren (10) gebildet werden, die sich quer zur Transportrichtung des Rollengangs erstrecken und in gegeneinander abgedichtete, gesondert an die Steuermittel angeschlossene Rohrabschnitte (11 bis 13) unterteilt sind.
- Standquette nach Anspruch 20, dadurch gekennzeichnet, daß drei Rohrabschnitte (11 bis 13) vorgesehen sind und daß der mittlere Rohrabschnitt (12) über eine durch einen der seitlichen Rohrabschnitte (13) führende Leitung (15) an die Steuermittel angeschlossen ist.
- Standquette nach einem der Ansprüche 13 bis 21, dadurch gekennzeichnet, daß die oberhalb des Rollenganges vorgesehenen Düsen an einem vertikal verfahrbaren Quettenrahmen angeordnet sind, dessen Hubhöhe in Abhängigkeit von der Dicke der abzuschreckenden Bleche gesteuert wird.
- Standquette nach einem der Ansprüche 13 bis 22, gekennzeichnet durch eine vorgeschaltete Einrichtung zum definierten Ausrichten der Bleche.
- Kammer-Pendelrollenherd-Erwärmungsanlage mit einer Standquette nach einem der Ansprüche 13 bis 23.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19937764 | 1999-08-10 | ||
DE19937764A DE19937764A1 (de) | 1999-08-10 | 1999-08-10 | Verfahren und Vorrichtung zum Wärmebehandeln von Blechen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1076103A2 true EP1076103A2 (de) | 2001-02-14 |
EP1076103A3 EP1076103A3 (de) | 2003-04-02 |
EP1076103B1 EP1076103B1 (de) | 2005-12-28 |
Family
ID=7917870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00116544A Expired - Lifetime EP1076103B1 (de) | 1999-08-10 | 2000-08-01 | Verfahren und Vorrichtung zum Waermebehandeln von Blechen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1076103B1 (de) |
AT (1) | ATE314491T1 (de) |
DE (2) | DE19937764A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3141619B1 (de) | 2015-09-08 | 2019-04-17 | ThyssenKrupp Steel Europe AG | Verfahren zum einstellen einer mechanischen eigenschaft eines werkstücks aus stahl |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE886002C (de) * | 1942-10-09 | 1953-08-10 | Hoerder Huettenunion Ag | Verfahren zum Haerten von Blechen |
DE3027846A1 (de) * | 1979-11-09 | 1981-05-27 | Ishikawajima-Harima Jukogyo K.K., Tokyo | Verfahren und einrichtung zum abkuehlen von blech, insbesondere stahlblech, mittels wasser |
EP0153688A1 (de) * | 1984-02-20 | 1985-09-04 | Nippon Steel Corporation | Verfahren zum Abkühlen von heissen Stahlblechen |
JPS60197825A (ja) * | 1984-03-19 | 1985-10-07 | Yokogawa Hokushin Electric Corp | 冷却制御方法 |
WO1998002592A1 (fr) * | 1996-07-11 | 1998-01-22 | T.I. Consult | Procede et dispositif de trempe de produits metalliques plats |
-
1999
- 1999-08-10 DE DE19937764A patent/DE19937764A1/de not_active Withdrawn
-
2000
- 2000-08-01 AT AT00116544T patent/ATE314491T1/de active
- 2000-08-01 EP EP00116544A patent/EP1076103B1/de not_active Expired - Lifetime
- 2000-08-01 DE DE50011947T patent/DE50011947D1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE886002C (de) * | 1942-10-09 | 1953-08-10 | Hoerder Huettenunion Ag | Verfahren zum Haerten von Blechen |
DE3027846A1 (de) * | 1979-11-09 | 1981-05-27 | Ishikawajima-Harima Jukogyo K.K., Tokyo | Verfahren und einrichtung zum abkuehlen von blech, insbesondere stahlblech, mittels wasser |
EP0153688A1 (de) * | 1984-02-20 | 1985-09-04 | Nippon Steel Corporation | Verfahren zum Abkühlen von heissen Stahlblechen |
JPS60197825A (ja) * | 1984-03-19 | 1985-10-07 | Yokogawa Hokushin Electric Corp | 冷却制御方法 |
WO1998002592A1 (fr) * | 1996-07-11 | 1998-01-22 | T.I. Consult | Procede et dispositif de trempe de produits metalliques plats |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 056 (C-331), 6. März 1986 (1986-03-06) & JP 60 197825 A (YOKOKAWA HOKUSHIN DENKI KK), 7. Oktober 1985 (1985-10-07) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3141619B1 (de) | 2015-09-08 | 2019-04-17 | ThyssenKrupp Steel Europe AG | Verfahren zum einstellen einer mechanischen eigenschaft eines werkstücks aus stahl |
Also Published As
Publication number | Publication date |
---|---|
DE19937764A1 (de) | 2001-02-15 |
ATE314491T1 (de) | 2006-01-15 |
EP1076103A3 (de) | 2003-04-02 |
EP1076103B1 (de) | 2005-12-28 |
DE50011947D1 (de) | 2006-02-02 |
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