EP1809775A2 - Device for cooling long objects - Google Patents
Device for cooling long objectsInfo
- Publication number
- EP1809775A2 EP1809775A2 EP05797187A EP05797187A EP1809775A2 EP 1809775 A2 EP1809775 A2 EP 1809775A2 EP 05797187 A EP05797187 A EP 05797187A EP 05797187 A EP05797187 A EP 05797187A EP 1809775 A2 EP1809775 A2 EP 1809775A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- cooling
- diameter
- cladding tube
- nozzles
- 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
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
- C21D1/18—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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
-
- 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
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
Definitions
- the invention relates to a device for cooling long objects according to the preamble of claim 1.
- Long articles are understood to mean wires, tubes, rods, spring steels, plates and similar articles whose
- Length expansion is much greater than the dimensions in width and / or in height. In making (casting or drawing) such "endless" articles or after the heat treatment, rapid quenching is often required to suitably transform microstructures.
- the object of the invention is to propose a device with which long or endless objects can be gas-cooled reliably, quickly and economically. This object is achieved by a device with the features of claim 1. Embodiments of the invention are objects of dependent claims.
- the device according to the invention has two differently dimensioned chambers or regions, wherein in the first chamber (nozzle region) a plurality of nozzles are provided, which blow cold gas jets onto the object to be cooled.
- the second area (cladding tube) is relatively long and encloses the object to be cooled over a relatively long area.
- the gap formed between the object to be cooled and the inner wall of the cladding tube flows through the cold gas which has been sprayed from the nozzles towards the object and thus either further cools the article as the article moves or cools it in the direction of the gas when the direction of movement of the object is against the gas direction.
- the cross section of the cladding tube is adapted to the object to be cooled. If the object is round, the cladding tube is also cylindrical, rectangular in the case of rectangular bars. The cladding closely encloses the article so that the cooling gas is conducted close to the article.
- the invention may be located on one side of the nozzle portion, a sealing region which rests relatively close to the object to be cooled and prevents refrigerant gas escaping in this direction. This has the advantage that the cooling gas flows only in the preferred direction.
- the cladding tube has a smaller diameter than the nozzle area.
- N 2 , H 2 , helium or N 2 H 2 mixtures, N 2 -helium mixtures, H 2 -helium mixtures or ternary mixtures of N 2 , H 2 and helium are advantageous.
- the dimensions of the objects to be cooled can range from wires of about 1 mm in diameter to tubes of any diameter, that is from a few centimeters to a few meters in diameter.
- Starting temperatures can be in the range of 400 to 1400 0 C, wherein the starting temperature depends on the alloy and the requirements of quenching.
- the gas pressures during spraying can be between 0 and 10 bar.
- the nozzles for discharging the gas jets are preferably oriented so as to blow in the radial direction on the object to be cooled, so that the entire circumference of the object is uniformly applied.
- the preferred distance between the article to be cooled and the gas-carrying casing is chosen such that the gas velocity in the cladding tube gap is between one and ten meters per second (preferably between 3 and 6 m / s).
- the direction of the gas can run both with the product direction and against the product direction. If such a plant is connected to a heating furnace or to a device for casting, drawing or producing the metal, this object will always move in one direction. The gas may then flow parallel thereto or in the opposite direction. The gas flow in is preferred
- the gap between the cooling jacket and the object should not be so small that a considerable back pressure is created and the gas from flowing ⁇ prevents, so that a significant back pressure against the current flowing from the nozzle gas.
- the gas volume should be controlled so that the gas leaving the unit is not unduly hot.
- Turbulence generating units can be installed inside the pipe, which destroy the laminar flow, create turbulence and therefore lead to better cooling.
- Product speed reaches the intended final temperature of the product. This is possible due to greater length if a lower end temperature is desired.
- the figure shows schematically the object 2 to be cooled, in this case a rod or a tube, within the cooling device according to the invention.
- the cooling device according to the invention comprises a nozzle region 2 and a cladding tube 6, which adjoins the nozzle region 4, in the nozzle region 4, the nozzles 8 are shown schematically.
- a sealing region 10 connects, which rests relatively close to the object 2 and prevents leakage of the gas to the left.
- swirling elements 12 which may also extend over the entire circumference of the cladding tube.
- the object 2 to be cooled moves either from left to right or from right to left through the device according to the invention.
- cold gas is blown through the nozzles 8 onto the object 2.
- the object 2 cools strongly in the nozzle area 4.
- the gas then flows through the gap between the article 2 and the cladding tube 6 to the right, where it further cools the article 2.
- Preferred dimensions are:
- the length of the cladding tube is 2 to 50, preferably 30 to 50 times as large as its diameter, so for example between 0.1 and 1 m.
- the gaps between the object 2 and the cladding tube 6 are between 5 and 20 mm.
- the nozzle diameters are eg 1, 2 mm.
- the length of the nozzle area is a few centimeters to decimeters. For a good heat transfer coefficient, the following should apply:
- d 0, 1 to 0.2 x H preferably: d 0, 18 H and
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 Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004054627A DE102004054627A1 (en) | 2004-11-11 | 2004-11-11 | Device for cooling long objects |
PCT/EP2005/011447 WO2006050814A2 (en) | 2004-11-11 | 2005-10-25 | Device for cooling long objects |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1809775A2 true EP1809775A2 (en) | 2007-07-25 |
EP1809775B1 EP1809775B1 (en) | 2009-01-14 |
Family
ID=35355624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05797187A Not-in-force EP1809775B1 (en) | 2004-11-11 | 2005-10-25 | Device for cooling long objects |
Country Status (7)
Country | Link |
---|---|
US (1) | US7497984B2 (en) |
EP (1) | EP1809775B1 (en) |
AT (1) | ATE420979T1 (en) |
BR (1) | BRPI0517300B1 (en) |
DE (2) | DE102004054627A1 (en) |
ES (1) | ES2321120T3 (en) |
WO (1) | WO2006050814A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9290823B2 (en) | 2010-02-23 | 2016-03-22 | Air Products And Chemicals, Inc. | Method of metal processing using cryogenic cooling |
EP2933342A1 (en) * | 2014-04-15 | 2015-10-21 | Böhler-Uddeholm Precision Strip GmbH | Method and device for producing a strip steel with bainitic microstructure |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3675908A (en) * | 1971-01-04 | 1972-07-11 | Ajax Magnethermic Corp | Quenching device |
JPS5767134A (en) * | 1980-10-09 | 1982-04-23 | Nippon Steel Corp | Method and installation for continuous annealing method of cold-rolled steel strip |
DE3234863C2 (en) * | 1982-09-21 | 1986-04-10 | Messer Griesheim Gmbh, 6000 Frankfurt | Process and device for bright annealing of metallic workpieces with nitrogen as protective gas |
US6656413B2 (en) * | 2001-06-21 | 2003-12-02 | Can-Eng Furnaces Ltd | Method and apparatus for quenching metal workpieces |
FR2844809B1 (en) * | 2002-09-20 | 2007-06-29 | Air Liquide | RAPID COOLING PROCESS OF PARTS BY CONVECTIVE AND RADIATIVE TRANSFER |
-
2004
- 2004-11-11 DE DE102004054627A patent/DE102004054627A1/en not_active Withdrawn
-
2005
- 2005-10-25 AT AT05797187T patent/ATE420979T1/en not_active IP Right Cessation
- 2005-10-25 WO PCT/EP2005/011447 patent/WO2006050814A2/en active Application Filing
- 2005-10-25 BR BRPI0517300-0A patent/BRPI0517300B1/en not_active IP Right Cessation
- 2005-10-25 EP EP05797187A patent/EP1809775B1/en not_active Not-in-force
- 2005-10-25 ES ES05797187T patent/ES2321120T3/en active Active
- 2005-10-25 DE DE502005006494T patent/DE502005006494D1/en active Active
-
2007
- 2007-05-10 US US11/801,455 patent/US7497984B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006050814A3 * |
Also Published As
Publication number | Publication date |
---|---|
EP1809775B1 (en) | 2009-01-14 |
US20070289678A1 (en) | 2007-12-20 |
BRPI0517300A (en) | 2008-10-07 |
ES2321120T3 (en) | 2009-06-02 |
BRPI0517300B1 (en) | 2014-11-04 |
DE102004054627A1 (en) | 2006-05-18 |
ATE420979T1 (en) | 2009-01-15 |
DE502005006494D1 (en) | 2009-03-05 |
WO2006050814A3 (en) | 2007-12-13 |
US7497984B2 (en) | 2009-03-03 |
WO2006050814A2 (en) | 2006-05-18 |
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