WO2007054398A1 - Anlage zur trockenen umwandlung eines material-gefüges von halbzeugen - Google Patents
Anlage zur trockenen umwandlung eines material-gefüges von halbzeugen Download PDFInfo
- Publication number
- WO2007054398A1 WO2007054398A1 PCT/EP2006/066733 EP2006066733W WO2007054398A1 WO 2007054398 A1 WO2007054398 A1 WO 2007054398A1 EP 2006066733 W EP2006066733 W EP 2006066733W WO 2007054398 A1 WO2007054398 A1 WO 2007054398A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- microstructure
- conversion
- semi
- quenching
- 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
- C21D1/56—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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
Definitions
- the present invention relates to a plant for dry conversion of a material microstructure of semifinished products according to claim 1.
- a heating of the material in a temperature range of about 850 ° C is carried out, so that adjusts the so-called austenite microstructure in the material.
- the so heated components must be quenched rapidly to the intermediate stage tempering temperature.
- a temperature range of about 220 ° C in which adjusts the so-called bainite microstructure.
- this temperature is only slightly above the so-called martensite start temperature to which the workpieces must not cool during the structural transformation process in any case, as this would have massive disruption of the desired, particularly advantageous Bainit- structure would result.
- DE 100 44 362 C2 discloses a plant concept in which the components to be tempered, which are also referred to as semi-finished products, are reacted after quenching and controlled interception at the transformation temperature in a heated transport vehicle and transported with this to an annealing furnace.
- the components are removed during the transfer from the quenching chamber, which is under gas pressure, and are transported by means of a transport carriage to the conversion chamber arranged downstream in the process flow, inserted therein and kept constant in temperature.
- the present invention is therefore based on the object to improve a system for dry conversion of a material structure of semi-finished products.
- a plant for dry conversion of a material structure of semifinished products comprise a quenching chamber and a structural transformation chamber subsequently arranged in the processing flow, wherein in each case an interior of the two chambers is at least during the respective process step for converting the material structure with gas overpressure. is charged.
- This approach is based on the finding that, by avoiding a drastic relaxation of a pressurized gas, it is ensured that the gas temperature and consequently also the temperature of the semi-finished products can not drop undesirably low in the surrounding area of the semi-finished products.
- the means for maintaining a minimum gas pressure on the semi-finished products during the conversion of the semi-finished products can therefore comprise a partition with a door between the quenching chamber and the microstructure conversion chamber.
- the quenching and microstructure conversion chamber may be arranged adjacent to each other, so that after the quenching process, only the door in the partition between the two pressurized chambers must be opened to a semi-finished product to be quenched from under gas overpressure Quenching chamber can be converted directly into the also under gas overpressure structural microstructure chamber. It is therefore no longer necessary to relax the gas surrounding the semi-finished products to the ambient pressure. This eliminates the risk of an impermissible temperature reduction, which could possibly endanger the conversion process. Furthermore, with this embodiment of immediately adjacent chambers, such a rapid conversion of the semi-finished products ensures that the semi-finished products are already in the microstructure conversion chamber before a marked increase in temperature can take place due to the exothermic process starting therein.
- a single quenching chamber is connected to a plurality of microstructure conversion chambers according to the first embodiment. This is particularly advantageous if - A -
- the residence time of the semifinished product for the intermediate stage compensation in a microstructure conversion chamber is relatively large.
- the quenching chamber comprising it can, after the quenching process has taken place, gradually supply different semifinished products, which are assigned to it, with corresponding batches, in the form of corresponding components. This allows a time and cost-optimized process control.
- the means for maintaining the minimum gas pressure on the semi-finished products to comprise a separately movable pressure chamber between the quenching chamber and the microstructure conversion chamber when converting the semi-finished products.
- These could be formed, for example, in the form of a mobile lock, which is preferably equipped with appropriate means, as it also has the microstructure conversion chamber.
- a substantially equal gas pressure can prevail in both chambers. This has the advantage that when transposing between the quenching chamber and the microstructure conversion chamber no temperature drop in the gas can occur due to a gas relaxation. Furthermore, the high pressure in the microstructure conversion chamber causes a very good heat dissipation from the semifinished product to be coated.
- a pressure ratio prevail, but preferably not greater than about the ratio 3: 1. With this ratio can still be ensured that there is no inadmissible cooling of the gas and thereby the components to be annealed by the thereby relatively low relaxation of the gas.
- Usual pressure ranges in the quenching chamber can be approximately in the range of 10 to 30 bar. In order to be able to dissipate sufficient heat, the level of the conversion chamber should in the longer term not fall below a pressure range of 3 bar.
- the system preferably also has a temperature control.
- the microstructure conversion chamber can be preheated by means of appropriate heating elements before introducing the charge to be tempered batch of semi-finished products to the appropriate temperature, and kept after introduction of the semifinished products by means of appropriate coolant exactly at the desired temperature.
- These coolants comprise, in particular, a gas stream flowing around the charge and under overpressure. Possibly.
- a cooling device may be arranged in the gas flow in order to be able to remove the waste heat absorbed by the charge from the gas flow again.
- the microstructure conversion chamber can furthermore comprise a gas circulation device; gas fans or fans are particularly suitable for this purpose.
- the system may further comprise a transport device.
- a transport device In only separated by a partition wall provided with a door quench and structure conversion chamber this could be operated, for example clocked. That after the quenching process and opening the door separating the two chambers, the transport device can be activated, whereupon it converts the semi-finished products from the quenching chamber into the conversion chamber.
- this transport device for example, further include a turntable to allow a corresponding orientation of the transport to the next to be charged microstructure conversion chamber, or of course a recording of a newly quenched batch from an upstream high-temperature furnace ,
- the conveying speed of the transport device is preferably at least so great that the time required for the conversion of the semifinished products is shorter than the time that passes between the end of the quenching process and a marked increase in the temperature of the semifinished product due to a structural transformation starting therein.
- a marked increase in temperature is considered to be the region around the inflection point of a curve representing the time course of the microstructure transformation.
- the plant may furthermore preferably have a pressure lock.
- the components can be discharged without significant pressure reduction in the microstructure conversion chamber from this and subsequently optionally to a subsequently arranged, acted upon with normal pressure temperature control chamber, for. B. a convection oven, are introduced to complete the remaining microstructure conversion.
- Figure 1 is a schematic representation of a system for dry conversion of a material structure of semifinished products
- FIG. 2 shows a schematically illustrated structure of a material structure.
- FIG. 3 shows a diagram in which, over a horizontal time axis, the reference a conversion of a material structure is applied.
- Figure 4 is a further schematic representation of a system for dry
- FIG. 1 shows an installation 1 for the dry conversion of a material structure of semi-finished products, in particular for dry bainitizing. It comprises a quenching chamber 2 and a microstructure conversion chamber 3, which is subsequently arranged in the machining flow, wherein an internal space of the two chambers is subjected to gas overpressure at least during the respective process step for converting the material structure.
- the semifinished products to be coated are shown here by way of example as batches 9.
- the semi-finished products must not undergo any significant temperature change when moving between the quench chamber and the microstructure transformation chamber. Particularly critical here are the outside areas or even thin-walled areas, which tend rapidly to fall below a permissible temperature range.
- the permissible temperature fluctuation width is approximately the range of
- these means comprise a partition wall 4 with a door between the quenching chamber 2 and the microstructure conversion chamber 3. Since both chambers are simultaneously subjected to gas pressure, a pressure equalization between the two chambers must be done before opening the door. This is preferably done by a pressure reduction in the quenching chamber. However, the semifinished products of charge 9 continue to be subjected at least to the gas overpressure prevailing in the microstructure conversion chamber, so that inadmissible cooling of the material is avoided.
- the charge 9 can then be removed from the quenching chamber to carry out the process, which takes much longer than the quenching process (about 35 to 40 seconds). ge conversion process (depending on material, component shape and component size of the semi-finished products up to several hours) are implemented.
- the door in the partition 4 between the two chambers 2, 3 are closed again to separate them pressure-tight from each other.
- the quenching chamber 2 can then be prepared to receive a new batch 9 to be quenched, while in the microstructure conversion chamber in the reacted semi-finished product the microstructure transformation process begins.
- the microstructure conversion chamber 3 may comprise a heating device 10 and / or a cooling device 11, which are preferably controlled by a temperature control 12 comprising a temperature sensor 12.1.
- a temperature control 12 comprising a temperature sensor 12.1.
- it may further comprise one or more gas circulation devices 13, which are here in the present embodiment as blowers or fans.
- the plant further comprises a transport device 14. This transport device 14 can be particularly advantageous in a clocked manner operate.
- FIG. Therein, the quenching chamber in the process sequence upstream of a high-temperature furnace 7 is shown.
- three batches 9 are arranged to be heated to a temperature from which they are cooled again in the quenching chamber. This is the austenitizing temperature, which at about 100Cr6 is about 850 ° C.
- the two chambers 2, 7 are formed with a corresponding to the partition wall 4 Partition 6 separated from each other. Since the high-temperature furnace 7 is preferably operated under vacuum, this is a lock 8 upstream with two lock dividing walls 8.1 and 8.2 on the input side.
- the microstructure conversion chamber 3 is, in this embodiment, sealed with a lock 5 and its associated partitions 5.1 and 5.2 relative to the outside prevailing ambient pressure.
- a partition 5.1 may be provided with a door arranged therein correspondingly for the removal of the semi-finished products converted therein.
- FIG. 3 The course of the microstructure transformation in the semi-finished products is shown by way of example in FIG. 3 in a diagram. Horizontally, the time is plotted in minutes and vertically the proportion of the already existing microstructure transformation in the relevant semi-finished products. It can be seen that relatively fast after quenching a strong conversion rate, here for example approximately at 8 min. used and in about 15 min. ongoing. This area is bounded by the two inflection points 15, 16 of the transformation reproducing curve 17.
- the plant is constructed so that the semifinished product to be converted is kept stable in its temperature by the microstructure transformation chamber during this time.
- the conversion of the semifinished product from the quenching chamber should be completed in the microstructure conversion chamber.
- a removal of the semifinished product from the microstructure conversion chamber should preferably take place after the time 19, to which already about 80% of the material structure has been converted.
- FIG. 4 shows a further embodiment of a plant 1 which, compared with the embodiment in FIG. 1, is expanded by a circulating air oven 20 which is operated at ambient pressure. In this convection oven, the semifinished product remains until even the remaining material structure is converted.
- a schematic temperature curve with respect to the overlying plant components is shown. chamber, conversion chamber, lock and convection oven).
- the temperature in degrees Celsius is plotted on the horizontal x-axis for the relevant process path in the system.
- the highest point of the curve represents the austenitizing temperature T Aust , which is approximately 850 ° C., and with which the semifinished products are introduced into the quenching chamber.
- T Aust the austenitizing temperature
- T Ba ⁇ n which is around 220 ° C.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Furnace Details (AREA)
- Tunnel Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2006800415817A CN101305106B (zh) | 2005-11-08 | 2006-09-26 | 用于对半成品的材料结构进行干式转换的设备 |
US12/092,851 US9303294B2 (en) | 2005-11-08 | 2006-09-26 | Installation for the dry transformation of a material microstructure of semi-finished products |
EP06793827A EP1954841A1 (de) | 2005-11-08 | 2006-09-26 | Anlage zur trockenen umwandlung eines material-gefüges von halbzeugen |
BRPI0618364-6A BRPI0618364B1 (pt) | 2005-11-08 | 2006-09-26 | Instalação para a transformação seca de uma estrutura do material de produtos semiacabados |
JP2008539375A JP4861425B2 (ja) | 2005-11-08 | 2006-09-26 | 半製品の材料組織を乾燥状態で変態させるための装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005053134.2 | 2005-11-08 | ||
DE102005053134A DE102005053134A1 (de) | 2005-11-08 | 2005-11-08 | Anlage zur trockenen Umwandlung eines Material-Gefüges von Halbzeugen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007054398A1 true WO2007054398A1 (de) | 2007-05-18 |
Family
ID=37440786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/066733 WO2007054398A1 (de) | 2005-11-08 | 2006-09-26 | Anlage zur trockenen umwandlung eines material-gefüges von halbzeugen |
Country Status (7)
Country | Link |
---|---|
US (1) | US9303294B2 (de) |
EP (1) | EP1954841A1 (de) |
JP (1) | JP4861425B2 (de) |
CN (1) | CN101305106B (de) |
BR (1) | BRPI0618364B1 (de) |
DE (1) | DE102005053134A1 (de) |
WO (1) | WO2007054398A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005051420A1 (de) * | 2005-10-27 | 2007-05-03 | Robert Bosch Gmbh | Verfahren und Anlage zur trockenen Umwandlung eines Material-Gefüges von Halbzeugen |
DE102008036490B4 (de) * | 2008-08-06 | 2012-12-13 | Ald Vacuum Technologies Gmbh | Verfahren zur Hochdruckgasabschreckung und Vorrichtung dafür |
CN103103318B (zh) * | 2013-02-06 | 2016-04-20 | 王绥义 | 一种高抗扭型钻杆钻铤接头的制造方法及设备 |
EP2933342A1 (de) * | 2014-04-15 | 2015-10-21 | Böhler-Uddeholm Precision Strip GmbH | Verfahren und Vorrichtung zur Herstellung eines Bandstahls mit bainitischer Gefügestruktur |
CN111850253A (zh) * | 2020-07-25 | 2020-10-30 | 恒吉集团实业有限公司 | 一种高强高导电铜丝制备用的淬火装置 |
CN117355619A (zh) * | 2021-02-05 | 2024-01-05 | 康明斯有限公司 | 用于在贝氏体生产中进行真空和油等温淬火的方法和系统 |
DE102021130969A1 (de) * | 2021-11-25 | 2023-05-25 | Ald Vacuum Technologies Gmbh | Verfahren und System zum Bainitisieren metallischer Werkstücke |
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EP0422353A2 (de) * | 1989-10-12 | 1991-04-17 | Ipsen Industries International Gesellschaft Mit Beschränkter Haftung | Ofen zur partiellen Wärmebehandlung von Werkzeugen |
DE4422588C1 (de) * | 1994-06-28 | 1995-06-22 | Leybold Durferrit Gmbh | Verfahren zum Abschrecken von Werkstücken durch Gase und Wärmebehandlungsanlage zur Durchführung des Verfahrens |
DE4442903A1 (de) * | 1994-12-02 | 1996-06-05 | Hans Ruediger Dr Ing Hoffmann | Vakuumkammerofenanlage in einem senkrecht stehenden Behälter, der der Länge nach in drei etwa gleichgroße Kammern unterteilt ist, von denen die beiden äußeren während des Betriebs stets unter Überdruck stehen |
EP0962538A2 (de) * | 1998-06-02 | 1999-12-08 | Linde Aktiengesellschaft | Verfahren und Vorrichtung zur effektiven Abkühlung von Behandlungsgut |
DE10118244C1 (de) * | 2001-04-11 | 2002-08-22 | Ald Vacuum Techn Ag | Modulare Vorrichtung für die Abschreckhärtung von Werkstücken |
US20020153073A1 (en) * | 2001-04-17 | 2002-10-24 | Kiyoyuki Hattori | Heat treatment method and heat treatment furnace used therein |
EP1323995A2 (de) * | 2001-12-26 | 2003-07-02 | Nitrex Metal Inc | Mehrkammer Wärmebehandlungsvorrichtung |
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- 2006-09-26 US US12/092,851 patent/US9303294B2/en not_active Expired - Fee Related
- 2006-09-26 JP JP2008539375A patent/JP4861425B2/ja not_active Expired - Fee Related
- 2006-09-26 BR BRPI0618364-6A patent/BRPI0618364B1/pt not_active IP Right Cessation
- 2006-09-26 WO PCT/EP2006/066733 patent/WO2007054398A1/de active Application Filing
- 2006-09-26 EP EP06793827A patent/EP1954841A1/de not_active Withdrawn
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See also references of EP1954841A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101305106A (zh) | 2008-11-12 |
JP2009515133A (ja) | 2009-04-09 |
US9303294B2 (en) | 2016-04-05 |
CN101305106B (zh) | 2010-09-29 |
BRPI0618364A2 (pt) | 2011-08-30 |
US20090218738A1 (en) | 2009-09-03 |
JP4861425B2 (ja) | 2012-01-25 |
BRPI0618364B1 (pt) | 2018-04-03 |
EP1954841A1 (de) | 2008-08-13 |
DE102005053134A1 (de) | 2007-05-10 |
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