WO2010079445A1 - Method for cooling a moving metal belt - Google Patents

Method for cooling a moving metal belt Download PDF

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Publication number
WO2010079445A1
WO2010079445A1 PCT/IB2010/050039 IB2010050039W WO2010079445A1 WO 2010079445 A1 WO2010079445 A1 WO 2010079445A1 IB 2010050039 W IB2010050039 W IB 2010050039W WO 2010079445 A1 WO2010079445 A1 WO 2010079445A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
section
band
strip
outlet
Prior art date
Application number
PCT/IB2010/050039
Other languages
French (fr)
Inventor
Stéphane Mehrain
Christian Gaillard
Original Assignee
Fives Stein
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to FR0900078A priority Critical patent/FR2940979B1/en
Priority to FR0900078 priority
Application filed by Fives Stein filed Critical Fives Stein
Publication of WO2010079445A1 publication Critical patent/WO2010079445A1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D11/00Process control or regulation for heat treatments
    • C21D11/005Process control or regulation for heat treatments for cooling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C21D9/48Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • C21D9/573Continuous furnaces for strip or wire with cooling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • C21D9/573Continuous furnaces for strip or wire with cooling
    • C21D9/5735Details

Abstract

The present invention relates to a method for cooling a moving metal belt (2) in a continuous processing line by spraying a gas, a liquid, or a mixture consisting of gas and liquid onto the belt, the processing line including a cooling section (1) followed by a downstream section (4), the inlet (4a) of the downstream section corresponding to the outlet (1b) of the cooling section, wherein according to said method: the change in the temperature cross-section of the belt between the inlet (4a) and the outlet (4b) of the downstream section (4) is evaluated; the temperature cross-section suitable for the inlet of the downstream section is deduced, on the basis of a desired temperature cross-section at the outlet of the downstream section (4), in order to obtain the desired cross-section at the outlet; and the cooling capacity of the cooling section (1) is adjusted according to the width of the belt and over the length of the cooling section, while taking into the account the temperature cross-section of the belt at the inlet of the cooling section, so that the cooling makes it possible to obtain the aforementioned temperature cross-section at the outlet of the cooling section.

Description

 METHOD FOR COOLING A TILT METAL STRIP

The present invention relates to improvements made to the cooling sections of the continuous treatment lines of metal strips, especially annealing, galvanizing or ter blanc.

A line of continuous treatment of metal strips is composed of a succession of heat treatment sections, in particular heating, holding, cooling, aging, etc. The present invention relates to the cooling sections of the treatment lines. continuous and especially the rapid cooling sections, regardless of the cooling mode implemented, for example radiation, convection or any other cooling mode. The cooling of the metal strip can be obtained by blowing a gas on the strip, for example air, but more generally a mixture of nitrogen and hydrogen. The hydrogen content of the mixture is generally at least equal to 5% so as to limit the oxidation of the strip. Higher hydrogen contents are frequently used to improve cooling performance due to the gain on the exchange coefficient resulting from the physical properties of hydrogen.

In order to obtain even greater cooling slopes of the band, the cooling can also be obtained by the projection on the band of a liquid. This liquid is frequently water, which can be previously treated, for example to extract dissolved oxygen or mineral salts, and may contain additives to improve the heat exchange or limit the oxidation of the strip.

Cooling of the web may also be achieved by spraying a mixture of a gas and a liquid on the web. The gas used is generally nitrogen but can also be composed of a mixture of nitrogen and hydrogen, or any other gas. The coolant is frequently water, optionally treated as previously described.

The quality of cooling has a significant impact on the mechanical properties of the strip and its surface condition. Depending on the start and end temperatures of cooling and cooling slopes, the cooling of a metal band is usually accompanied by metallurgical transformations with phase changes so as to obtain the desired mechanical properties, for example in terms of mechanical strength or drawability. The nature of the phases formed, their proportion and their morphology depend on the temperatures and the cooling slopes. A good homogeneity of temperature on the bandwidth along the cooling section is thus crucial for the metallurgical transformations obtained to be those aimed at.

The continuous treatment lines have high band speeds, for example from 100 to 800 m / min, the band traveling on transport rollers. Guiding the moving tape in the different sections of the line is crucial to prevent the tape from coming into contact with the walls. Length differences in the bandwidth, for example long or short banks from the center of the band, affect the quality of the web guidance. It is understood that a difference in cooling intensity over the bandwidth leads to a difference in temperature and therefore a contraction difference of the band over its width having an impact on the guidance of the band.

After leaving the cooling section, the band travels in the downstream sections where the thermal path of the strip continues. It can for example cross an aging section with a maintenance of it at an appropriate temperature for several seconds to several minutes. During its passage in the section of the furnace located downstream of the cooling section, the band will see its average temperature evolve with a rise in temperature if it is a heating section or a temperature drop. it is a cooling section. The average temperature of the strip may also be kept constant if it is a holding section. Depending on the nature, the geometry, the means implemented for heating or cooling and the control mode of the section located downstream of the cooling section, the transverse temperature profile of the strip may change between the inlet and the outlet. the output of this section due to a different heat exchange on the bandwidth. Thus, a perfectly homogeneous temperature band at the outlet of the cooling section may have warmer or colder edges than the center at the outlet of the downstream chamber. It is easy to understand that the temperature profile of the strip at the outlet of the section situated downstream of the The cooling section will also be linked to the temperature profile of the strip at the outlet of the cooling section. It is therefore possible to influence the temperature profile of the strip at the outlet of the downstream section according to the temperature profile of the strip at the outlet of the cooling section.

It appears that the cooling control over the bandwidth, over the entire length of the cooling section, is decisive in order to obtain homogeneous mechanical properties over the bandwidth, to avoid band guiding defects and to anticipate the evolution of the temperature profile of the strip in the section downstream. This control is particularly crucial for wide and thin strips.

The purpose of the invention is, above all, to improve the cooling control over the bandwidth to meet these requirements, so that the cooling curve at each point of the width of the strip along the cooling section that is the target.

The invention thus relates to a method for cooling a moving metal strip, in a continuous treatment line, by spraying a gas, a liquid or a mixture consisting of a gas and a liquid, the treatment line comprising a cooling section followed by a downstream section having a thermal effect on the strip, the inlet of the downstream section corresponding to the outlet of the cooling section. The method of the invention is characterized in that:

the change in the transverse temperature profile of the band between the input and the output of the downstream section is evaluated in real time by means of a calculator from mathematical models according to the format of the band, the speed of the scrolling and the transverse temperature profile of the band at the inlet of the downstream section,

a transverse temperature profile adapted to the input of the downstream section is obtained from a transverse profile of the desired temperature at the outlet of the downstream section to obtain the desired profile at the output,

and adjusting in real time the cooling capacity of the cooling section according to the width of the strip and the length of the cooling section, by a system for controlling and controlling the line by means of the calculator starting from mathematical models taking into account the temperature profile transverse of the band at the inlet of the cooling section and the evolution of the thermal exchanges between the band and its environment in the cooling section, so that the cooling makes it possible to obtain, at the outlet of the cooling section , the aforesaid transversal profile! adapted temperature.

According to the invention, the cooling capacity is thus adjusted by taking into account in advance the future evolution of the transverse temperature profile of the strip during its stay in the section of the line located downstream of the cooling section.

The control of the temperature profile over the width of the web resulting from the adjustment of the cooling capacity to the bandwidth is intended to allow to improve the guidance of the web on the transport rollers by obtaining banks long or short compared to the center of the strip.

Adjustment of the cooling capacity can be achieved by splitting a cooling device into a plurality of units in the width direction and in the length direction of the cooling section. Each unit may be provided with regulating means to vary its cooling capacity independently of the other units.

The control of the regulating members can be ensured from a computer in which is installed a suitable program for controlling the cooling units. Advantageously, the computer receives information provided by temperature sensors distributed in the cooling section and by temperature sensors distributed in the downstream section, and the computer, based on this information, checks whether the cooling is carried out. the desired manner, and possibly corrects the progress of the cooling, according to the width of the strip and along its length to obtain the desired profile.

The invention consists, apart from the arrangements described above, in a certain number of other arrangements which will be more explicitly discussed hereinafter with reference to an exemplary embodiment described with reference to the appended drawing, but which is in no way limiting. On this drawing :

Fig. 1 is a schematic vertical section of a section of cooling and a downstream section of a line of continuous treatment of a metal strip.

Fig. 2 is a horizontal section along line H-II of FIG. 1, of the cooling section, and FIG. 3 is a diagram illustrating the variations of the transverse temperature profile of the strip, plotted on the ordinate, according to the width of the strip on the abscissa.

Referring to Fig.1 and 2 of the drawing, there can be seen a cooling section 1 of a line of continuous treatment of a metal strip 2 scrolling. Seion the example shown, the cooling section 1 is vertical but it could be horizontal, or inclined relative to the vertical. In the upper part of section 1, the band 2 passes on return rollers 3 to engage in a downstream section 4 also shown vertical in the example, but which can be arranged differently, especially horizontally. The width (FIG 2) of the strip 2 is perpendicular to the plane of FIG. 1.

The cooling of the strip 2 is ensured by projecting on each side of the strip a gas, a liquid or a mixture consisting of a gas and a liquid, with the aid of nozzles 5 distributed in the walls of section 1 parallel to the strip 2, on each side of this strip. The nozzles 5 are oriented so as to direct at least one jet of cooling fluid against the band 2, in particular in a direction substantially orthogonal to this band. The nozzles 5 are supplied with cooling fluid by ducts 6.

The inlet 4a of the downstream section corresponds to the outlet 1b of the cooling section. The band 2 has a transverse profile of temperature P (FIG 3) which depends on the zone considered of the band 2. The profile P represents the variation of the temperature of a point of the band along its width, which corresponds to a orthogonal direction in the direction of movement of the band.

According to the invention, depending on the format of the strip 2, in particular according to its width, its thickness and its nature, and as a function of the transverse temperature profile of the strip at the inlet 4a of the downstream section, the changing the transverse temperature profile between the inlet 4a and the outlet 4b of the downstream section.

This cross-sectional profile change can be evaluated from mathematical models for calculating thermal exchanges between band 2 and section 4, possibly supplemented by previous measurements. Then, from a desired transverse profile P4b (FIG. 3) of the outlet temperature 4b of the downstream section, the transverse temperature profile P4a at the inlet 4a of the downstream section is deduced by a reverse approach. which is adapted to obtain the desired profile P4b at the output. In the schematic example of FIG. 3, the desired P4b profile at the output is a nominative profile according to the width, that is to say that the temperature of the strip is constant from one shore to the other. In this example, the downstream section 4 has heating on the strip more marked on the left bank than in the center and on the other side. The profile P4a at the entrance of the section, adapted to give the profile P4b, will have a convex shape upward on the left bank, corresponding to a lower band temperature on the left bank.

On the one hand we have the transverse profile P4a at the inlet of the downstream section 4a, which is also the profile P1b at the outlet 1b of the cooling section, and on the other hand the transverse temperature profile P1a is known. at the entrance of the cooling section. According to the example of FIG. 3, the profile P1a is concave upwards, which corresponds to strip edges that are hotter than the center. The cooling capacity of the cooling section 1 along the width of the strip 2 and the length of the cooling section is then adjusted to obtain, from the input profile P1a, the output profile P1b = P4a. The transverse temperature profile P1a at the inlet is known using temperature sensors distributed over the width of the strip, at the inlet 1a.

Adjustment of cooling capacity over the width of the web can be achieved by many known means. Advantageously, this adjustment of the cooling capacity is obtained by splitting a cooling device R into a plurality of Ryz units in the direction of the width and in the lengthwise direction of the cooling section 1, that is to say in the vertical direction according to the example considered. The index y of Ryz can vary from 1 to m, m being the number of units according to the width of the band, while the index z can vary from 1 to n, n being the number of units following the length of the cooling section 1.

In general, each Ryz unit is equipped with a member, for example a control valve 7, for varying the flow rate of the cooling means, gas, liquid or gas / liquid mixture. In the case of a gas / liquid mixture, a control valve may be required on each fluid. Each unit is thus equipped with the necessary equipment to vary its cooling capacity independently of the other units. In the example illustrated in FIG. 1, each cooling unit Ryz comprises two nozzles 5, having the same position according to the width, but offset vertically along the length. The nozzles 5 of the same unit are fed in parallel from the same pipe 6 on which is disposed a control valve 7 controlling the flow rate of the gas or the flow rate of the cooling liquid ^

The control of the regulating members, such as the valves 7 is provided from a computer A in which is installed a suitable program for controlling the cooling units. The computer A further receives information provided by temperature sensors 8 distributed in the cooling section and by temperature sensors 9 distributed in the downstream section. The computer A, from this information, checks whether the cooling is carried out in the desired manner, and possibly corrects the progress of cooling, according to the width of the strip and along its length to obtain the desired profile. In the case of cooling by a mixture consisting of a gas and a liquid, each unit may for example be equipped with a flow control member only on the gas, the flow rate of the liquid being constant, or a flow control member only on the liquid, the gas flow rate being constant, or two control members for varying the gas flow rate and the flow rate of the liquid.

Each unit may also be equipped with a device G for varying the temperature of the gas, the liquid or the mixture consisting of a gas and a liquid so as to vary its cooling capacity. This variation of the temperature of the cooling means can be carried out for a constant flow rate of the cooling means or combined with a variation of the flow rate of the cooling means so as to increase the flexibility of regulation of the installation. For exemple :

if the section 4 situated downstream of the cooling section 1 is a heating section which leads to a higher temperature of one of the banks of the 5 ° C band, for example the left bank, whereas the a homogeneous temperature is sought at the outlet 4b thereof,

and if the strip 2 is perfectly temperature-uniform over the width in the cooling section 1, according to the invention, the cooling parameters are adjusted so that a greater cooling capacity on the bank considered, the left bank in the example, lead to an additional cooling of 5 ° C thereof relative to the rest of the bandwidth. According to a variant of this example:

if the strip 2 now enters the cooling section 1 as the edge considered to be colder by 10 ° C. than the remainder of the strip, according to the invention, the cooling parameters are adjusted so that a cooling capacity lower on the bank considered to lead to a lower cooling thereof of 10 ° C relative to the remainder of the bandwidth.

The program (s) installed in the computer A are established with mathematical means exploiting models based on your physical laws of thermal exchanges, and allow a good simulation of the temperature variations of a band 2 during its passage in a section of a continuous line according to the nature of the latter and its thermal state. It is therefore possible to predict the evolution of the temperature profile of the strip along this section and adjust accordingly the operating parameters of each unit of the cooling section.

Tests carried out during the commissioning of the continuous line are also used to calibrate the thermal model and increase the accuracy of the device by improving the program installed in the computer.

Claims

Method for cooling a moving metal strip (2) in a continuous treatment line by spraying a gas, a liquid or a mixture of a gas and a gas onto the strip a liquid, the treatment line comprising a cooling section (1) followed by a downstream section (4) having a thermal effect on the strip, the inlet (4a) of the downstream section corresponding to the outlet (1b ) of the cooling section, characterized in that:
the change in the transverse temperature profile of the band between the inlet (4a) and the outlet (4b) of the downstream section (4) is determined in real time by means of a calculator (A) from models mathematics taking into account the format of the band, the running speed of the band, the transverse temperature profile (P4a) of the band at the inlet of the downstream section and the evolution of the thermal exchanges between the band and its environment in the downstream section
(4)
from a desired transverse temperature profile (P4b) at the outlet of the downstream section (4), the transverse temperature profile (P4a) at the inlet of the downstream section is adapted to obtain the desired profile in exit,
the cooling capacity of the cooling section (1) is regulated according to the width of the strip and the length of the cooling section in real time by a system for controlling and controlling the line by means of the computer (A ) from mathematical models taking into account the transverse temperature profile of the band (P 1a) at the inlet of the cooling section and revolution of heat exchange between the band and its environment in the cooling section (1), such that the cooling allows to obtain, at the outlet of the cooling section, the aforesaid transverse profile of adapted temperature (P4a).
Method according to claim 1, characterized in that the adjustment of the cooling capacity is obtained by splitting a cooling device (R) into a plurality of units (Ryz) in the width direction and in the direction of the length of the cooling section (1).
3. Method according to claim 2, characterized in that each unit (Ryz) is provided with regulating members (7) to vary its cooling capacity independently of other units.
4. Method according to claim 3, characterized in that the control of the regulating members (7) is provided from the computer (A) in which is installed a suitable program for controlling the cooling units.
5. Method according to claim 4, characterized in that the computer (A) receives information provided by temperature sensors (8) distributed in the cooling section (1) and by temperature sensors (9) distributed in the downstream section, and the computer (A) 1 from this information, checks whether the cooling is carried out in the desired manner, and possibly corrects the progress of the cooling, according to the width of the strip and along its length to obtain the profile wish.
PCT/IB2010/050039 2009-01-09 2010-01-07 Method for cooling a moving metal belt WO2010079445A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0900078A FR2940979B1 (en) 2009-01-09 2009-01-09 Method for cooling a threaded metal strip
FR0900078 2009-01-09

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20100702914 EP2376664A1 (en) 2009-01-09 2010-01-07 Method for cooling a moving metal belt
US13/143,024 US20110266725A1 (en) 2009-01-09 2010-01-07 Method for cooling a moving metal belt

Publications (1)

Publication Number Publication Date
WO2010079445A1 true WO2010079445A1 (en) 2010-07-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/050039 WO2010079445A1 (en) 2009-01-09 2010-01-07 Method for cooling a moving metal belt

Country Status (5)

Country Link
US (1) US20110266725A1 (en)
EP (1) EP2376664A1 (en)
KR (1) KR20110117132A (en)
FR (1) FR2940979B1 (en)
WO (1) WO2010079445A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT511034B1 (en) * 2011-02-04 2013-01-15 Andritz Tech & Asset Man Gmbh Method for controlling a protection gasatomos in a protective gas chamber for treating a metal strip
KR101376565B1 (en) * 2011-12-15 2014-04-02 (주)포스코 Method and apparatus for controlling the temperature of strip in the rapid cooling section of continuous annealing line
AU2017263399A1 (en) 2016-05-10 2019-01-03 United States Steel Corporation High strength steel products and annealing processes for making the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4243441A (en) * 1979-05-09 1981-01-06 National Steel Corporation Method for metal strip temperature control
US4440583A (en) * 1982-01-11 1984-04-03 Nippon Steel Corporation Method of controlled cooling for steel strip
EP0128734A2 (en) * 1983-06-11 1984-12-19 Nippon Steel Corporation Method for cooling a steel strip in a continuous-annealing furnace
JPH03207821A (en) * 1990-01-09 1991-09-11 Kawasaki Steel Corp Controlling method for cooling strip in cooling zone of continuous annealing
DE10129565A1 (en) * 2001-06-20 2003-01-09 Siemens Ag Cooling process for a hot-rolled rolling stock and corresponding cooling section model
JP2004059971A (en) * 2002-07-26 2004-02-26 Nippon Steel Corp Method for controlling cooling of steel strip
FR2897620A1 (en) * 2006-02-21 2007-08-24 Stein Heurtey Cooling and stabilization of metal strip in a continuous heat treatment line by controlling the pressure in gas blown cooling boxes to provide a given cooling curve along the cooling length

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4243441A (en) * 1979-05-09 1981-01-06 National Steel Corporation Method for metal strip temperature control
US4440583A (en) * 1982-01-11 1984-04-03 Nippon Steel Corporation Method of controlled cooling for steel strip
EP0128734A2 (en) * 1983-06-11 1984-12-19 Nippon Steel Corporation Method for cooling a steel strip in a continuous-annealing furnace
JPH03207821A (en) * 1990-01-09 1991-09-11 Kawasaki Steel Corp Controlling method for cooling strip in cooling zone of continuous annealing
DE10129565A1 (en) * 2001-06-20 2003-01-09 Siemens Ag Cooling process for a hot-rolled rolling stock and corresponding cooling section model
JP2004059971A (en) * 2002-07-26 2004-02-26 Nippon Steel Corp Method for controlling cooling of steel strip
FR2897620A1 (en) * 2006-02-21 2007-08-24 Stein Heurtey Cooling and stabilization of metal strip in a continuous heat treatment line by controlling the pressure in gas blown cooling boxes to provide a given cooling curve along the cooling length

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
FR2940979A1 (en) 2010-07-16
KR20110117132A (en) 2011-10-26
EP2376664A1 (en) 2011-10-19
FR2940979B1 (en) 2011-02-11
US20110266725A1 (en) 2011-11-03

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