EP1160342B1 - Procédé de mise en sécurisation d'une enceinte de traitement thermique fonctionnant sous atmosphère contrôlée - Google Patents

Procédé de mise en sécurisation d'une enceinte de traitement thermique fonctionnant sous atmosphère contrôlée Download PDF

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Publication number
EP1160342B1
EP1160342B1 EP01400953A EP01400953A EP1160342B1 EP 1160342 B1 EP1160342 B1 EP 1160342B1 EP 01400953 A EP01400953 A EP 01400953A EP 01400953 A EP01400953 A EP 01400953A EP 1160342 B1 EP1160342 B1 EP 1160342B1
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EP
European Patent Office
Prior art keywords
atmosphere
chamber
installation
rapid cooling
zone
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.)
Expired - Lifetime
Application number
EP01400953A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1160342A1 (fr
Inventor
François Mignard
Runmeng Song
Stéphane Mehrain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives Stein SA
Original Assignee
Stein Heurtey SA
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Filing date
Publication date
Application filed by Stein Heurtey SA filed Critical Stein Heurtey SA
Publication of EP1160342A1 publication Critical patent/EP1160342A1/fr
Application granted granted Critical
Publication of EP1160342B1 publication Critical patent/EP1160342B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • C21D9/565—Sealing arrangements
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling

Definitions

  • the present invention relates to a method for securing a heat treatment chamber operating under controlled atmosphere. It aims more particularly a method of securing an enclosure of treatment operating under a high-grade atmosphere in hydrogen.
  • it also relates to a heat treatment plant such as in particular speakers encountered in the field of vertical furnaces heat treatments or tape coatings continuous metal.
  • Continuous heat treatment furnaces such as example the annealing or coating furnaces are composed one or more of the following zones: preheating, heating, maintaining, slow cooling and cooling fast.
  • Each of these areas allows you to heat, maintain the temperature of the belt or cool it according to slopes heating and cooling and precise times defined by the metallurgical treatment cycle corresponding to the material to be treated.
  • the increase in performance of the cooling zones requires the use of an atmosphere with a high hydrogen content, up to 100%, in order to achieve a large increase in exchange coefficient able to generate slopes of cooling of the order of 80 to 200 ° C / second or more for a 0.8 mm thick strip compatible with processing cycles to get at the nominal speed of the line.
  • WO 99/50464 provides for balancing the pressures between the rapid cooling zone and a airlock compartment.
  • a sheath can be provided between upstream and downstream parts of the rapid cooling zone. In such an installation, the flow rates of gas through sas are not well controlled.
  • the method of securing a security heat treatment chamber operating under atmosphere of gas said chamber comprising a chamber of rapid cooling of a metal strip moving from an upstream chamber to a downstream chamber through a plurality of guide rollers, is characterized in that the band is confined within the enclosure of rapid cooling using at least one sheath pressure balancing device and a plurality of airlocks between the different rooms, in that we balance the pressures between the entrance and exit of the chamber of rapid cooling and in that one balances the pressures of gas atmospheres between the upstream chamber and the downstream chamber using at least one balancing sleeve of pressure, by controlling the flow rates of gas through said airlock by means of recycling conveying the atmosphere extracted from the rapid cooling chamber to a zone of rejection and / or to a dilution zone.
  • An installation for the implementation of the process is characterized in that it comprises a balancing sleeve of pressure between the entrance and exit of the chamber of rapid cooling and means of recycling the atmosphere extracted from the rapid cooling chamber to a reject zone and / or to a dilution zone.
  • this installation includes a vertical furnace continuous movement of a metal strip 1 running from a upstream chamber 2 to a downstream chamber 7 on rolls of guidance 3.
  • a rapid cooling chamber is represented by 5, it is equipped with cooling devices by gas blowing on the tape according to the state of the art (no represented in the figure).
  • the rapid cooling chamber 5 is separated from upstream and downstream chambers 7 by means of sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
  • sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
  • this is to confine a portion of tape that is intended to undergo a heat treatment, such as in particular a rapid cooling in a sheath 6.
  • This sheath 6 is positioned within the rapid cooling chamber 5 and is filled with a controlled atmosphere with a high content of hydrogen.
  • the sheath 6 located in the cooling chamber 5 also provides communication between rooms 2 and 7 to balance the pressures.
  • the high hydrogen content of this leak can be diluted in the atmosphere of rooms 2 and 7 by behaving like a supplement of hydrogen for these rooms.
  • the pressures and hydrogen contents of chambers 2, 5, 6 and 7 are controlled by sensors and a device regulating which adjusts the additions in atmosphere, so to maintain these pressures and the compositions of different atmospheres of different rooms to their values required.
  • this installation differs from that shown in Figure 1 by the does that room 5 fast cooling and that is subjected to a gas-controlled atmosphere, incorporates into the once a strand up and a strand down the strip metallic.
  • This configuration requires placing locks 4a and 4b in the same altitude so that the gas pressures upstream and downstream of the airlock, be identical (same mass of the column gas).
  • the cooling equipment is spread over one or two strands or heating equipment - different or complementary cooling are implemented on the second strand of the band.
  • a sheath 6 encompasses the containment chamber 5 conforming around this last an envelope, which is connected to both rooms 2 and 7. This sheath 6 thus allows the setting in communication atmospheres prevailing in these rooms and participates in the balancing of the pressures.
  • Part 9 located substantially in the center of the installation and in the upper part of the sheath 8, is particularly reserved for the installation of blowing equipment on the band (ducts, control valves ). If the construction allow it, this part can be deleted, room 5 can then be performed as shown in Figure 3.
  • this installation includes a vertical furnace continuous movement of a metal strip 1 running from a upstream chamber 2 to a downstream chamber 7 on rolls of guidance 3.
  • a rapid cooling chamber is represented by 5, it is equipped with cooling devices by gas blowing on the tape according to the state of the art (no represented in the figure).
  • the rapid cooling chamber 5 is separated from upstream and downstream chambers 7 by means of sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
  • sealing devices 4a and 4b such as sas, shutters, roller locks, blades gases or others according to known technologies.
  • the airlock chambers 4a and 4b are arranged horizontally, respectively in upstream and downstream of the rapid cooling chamber 5, and allow to delimit in a direction substantially horizontal, a sheath 6 which puts in communication the adjacent rooms 2 and 7, thereby participating, as for the previous embodiments, to the balancing of the gas pressures prevailing in these chambers.
  • the rising and falling strands of the band can to be united in a single room as represented on the figure 3.
  • this installation shall include means enabling the securing the atmosphere of the cooling chamber high hydrogen content.
  • this installation has three sheaths balancing the pressures between different points of the rooms of the treatment line.
  • the high hydrogen content chamber 5 is equipped with a first balancing sleeve 8 in order to maintain the same pressure at the isolation locks 4a and 4b.
  • a second balancing sleeve 10 makes it possible to maintain the pressures of at the same level.
  • a third balancing sleeve 6 makes it possible to maintain upstream and downstream chamber pressures 2 and the same level, and allows the free movement of gas between these upstream and downstream zones without disturbing the airlock pressure and the high-grade chamber hydrogen 5.
  • Atmosphere racking points may be carried out in each of the zones or in the pressure balancing sleeves, to allow the evacuation of a parasitic flow between two zones which could disrupt the atmosphere.
  • the extraction of a flow of atmosphere from the chamber to high hydrogen content can be processed outside the line or be used directly in this line after nitrogen injection to recreate a low-grade atmosphere in hydrogen. This process makes it possible to limit important, the total consumption of the hydrogen line.
  • this installation is similar in design to that represented in Figure 5 (it has three sheaths pressure balance), but differs in that it includes means for carrying out a recycling of the atmosphere extracted from the high-grade chamber hydrogen.
  • First conduits 11a and 11b are connected to points extraction in a high hydrogen atmosphere, preferably located in the vicinity of locks 4a and 4b. of the extraction devices, for example fans 12a and 12b, convey said atmosphere and direct it through second conduits 16a and 16b, ie to a rejection zone 13a or 13b outside the facility, either to a dilution zone 14a, 14b, with a make-up gas mixture (including nitrogen), in order to obtain an atmosphere whose hydrogen content is lowered to a value corresponding to the hydrogen content of upstream 2 and downstream 7 zones, within of which these diluted gas injection points are made at 15a and 15b.
  • a make-up gas mixture including nitrogen
  • these gas recycling means can be adapted to collect high atmospheric flow hydrogen content at different points in chamber 5 or airlock 4a and 4b, in order to limit the exchanges of atmospheres between chamber 5 and adjacent chambers 2, 7.
  • the airlock 4a and 4b and their pressure balancing sleeve 6 have been extended up to dial this equalizer room 17, the latter being, on the one hand, separated from the chamber high hydrogen content by airlock 19a and 19b, and on the other hand of the upstream chamber 2 by the airlock 18a and the downstream chamber 7 by the airlock 18b.
  • a balancing sleeve of pressure 6 brings together these upstream and downstream chambers.
  • the volume of the chamber 17 makes it possible to dampen the variations of pressure between the chamber 5 and the upstream and downstream chambers 2 7, and compensate for these pressure variations with the aid of a injection of atmosphere or extraction means.
  • a seventh embodiment of an installation of heat treatment for carrying out the process object of the invention in the case where the chamber under atmosphere with a high concentration of hydrogen is located at the end of the line and where there is no other room downstream.
  • This installation is overall similar to the sixth solution (see Figure 7) and differs from the fact that the downstream chamber is deleted, the output of band 21 is located in the enclosure 2 to keep it away from the strong zone hydrogen concentration.

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)
  • Furnace Details (AREA)
EP01400953A 2000-05-25 2001-04-12 Procédé de mise en sécurisation d'une enceinte de traitement thermique fonctionnant sous atmosphère contrôlée Expired - Lifetime EP1160342B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0006708 2000-05-25
FR0006708A FR2809418B1 (fr) 2000-05-25 2000-05-25 Procede de mise en securisation d'une enceinte de traitement thermique fonctionnant sous atmosphere controlee

Publications (2)

Publication Number Publication Date
EP1160342A1 EP1160342A1 (fr) 2001-12-05
EP1160342B1 true EP1160342B1 (fr) 2005-10-19

Family

ID=8850619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400953A Expired - Lifetime EP1160342B1 (fr) 2000-05-25 2001-04-12 Procédé de mise en sécurisation d'une enceinte de traitement thermique fonctionnant sous atmosphère contrôlée

Country Status (8)

Country Link
US (1) US6547898B2 (ja)
EP (1) EP1160342B1 (ja)
JP (1) JP4988096B2 (ja)
KR (1) KR100756589B1 (ja)
CN (1) CN1249256C (ja)
DE (2) DE1160342T1 (ja)
ES (1) ES2165342T3 (ja)
FR (1) FR2809418B1 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1014880A4 (fr) * 2002-06-14 2004-05-04 Ct Rech Metallurgiques Asbl Gestion des flux de gaz dans une section reactive.
FR2903122B1 (fr) * 2006-06-30 2008-09-12 Stein Heurtey Dispositif de securisation d'un four equipe d'un chauffage et d'un refroidissement rapides fonctionnant sous atmosphere controlee.
CN101354090B (zh) * 2007-07-25 2012-08-22 阿旺泰克西班牙公司 用于液化气体调节组件的阀
FR3014447B1 (fr) * 2013-12-05 2016-02-05 Fives Stein Procede et installation de traitement thermique en continu d'une bande d'acier
EP2915887B1 (en) * 2014-03-03 2019-07-24 Acciai Speciali Terni S.p.A. Apparatus for the treatment of a metal strip in a vertical annealing plant
KR101717960B1 (ko) 2016-03-03 2017-03-20 (주)나우이엔씨 강판의 연속 열처리로용 분위기 가스 실링 장치
EP3441481B1 (en) 2016-04-05 2020-11-11 Nippon Steel Corporation Cooling facility in continuous annealing furnace
US11560606B2 (en) 2016-05-10 2023-01-24 United States Steel Corporation Methods of producing continuously cast hot rolled high strength steel sheet products
US11993823B2 (en) 2016-05-10 2024-05-28 United States Steel Corporation High strength annealed steel products and annealing processes for making the same
BR112018073175B1 (pt) 2016-05-10 2022-08-16 United States Steel Corporation Produto de chapa de aço laminada a frio de alta resistência, e, método para produzir um produto de chapa de aço laminada a frio de alta resistência
WO2020227438A1 (en) 2019-05-07 2020-11-12 United States Steel Corporation Methods of producing continuously cast hot rolled high strength steel sheet products
WO2021026437A1 (en) 2019-08-07 2021-02-11 United States Steel Corporation High ductility zinc-coated steel sheet products
CA3151124A1 (en) 2019-08-19 2021-02-25 United States Steel Corporation High strength steel products and annealing processes for making the same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1987577A (en) * 1931-11-25 1935-01-08 Gen Electric Apparatus for the thermic treatment of metal wires, filaments, bands, or the like
US2534973A (en) * 1949-03-02 1950-12-19 Gen Electric Cooling apparatus
US3158507A (en) * 1960-01-11 1964-11-24 Continental Can Co Floating roller seal
DE3733884A1 (de) * 1987-10-07 1989-04-27 Linde Ag Verfahren zum gluehen von metallteilen in durchlaufoefen
JP2520507B2 (ja) * 1990-07-12 1996-07-31 新日本製鐵株式会社 ステンレス鋼帯の連続光輝焼鈍方法
FR2746112B1 (fr) * 1996-03-13 1998-06-05 Procede de traitement thermique en continu de bandes metalliques dans des atmospheres de nature differente
FR2769696B1 (fr) * 1997-10-15 1999-12-31 Stein Heurtey Systeme de securite pour fours a refroidissement rapide de bandes metalliques
JP4156065B2 (ja) * 1998-02-24 2008-09-24 日新製鋼株式会社 金属帯用連続還元性雰囲気焼鈍装置および方法
JP3572983B2 (ja) * 1998-03-26 2004-10-06 Ｊｆｅスチール株式会社 連続熱処理炉ならびに連続熱処理炉における冷却方法
EP1408126B1 (en) * 1998-03-26 2006-03-15 JFE Engineering Corporation Continuous heat treatment furnace

Also Published As

Publication number Publication date
CN1249256C (zh) 2006-04-05
FR2809418A1 (fr) 2001-11-30
KR20010107710A (ko) 2001-12-07
DE1160342T1 (de) 2002-05-23
KR100756589B1 (ko) 2007-09-10
US6547898B2 (en) 2003-04-15
CN1327144A (zh) 2001-12-19
ES2165342T1 (es) 2002-03-16
DE60114085D1 (de) 2005-11-24
JP2002003954A (ja) 2002-01-09
EP1160342A1 (fr) 2001-12-05
US20010045024A1 (en) 2001-11-29
DE60114085T2 (de) 2006-07-13
JP4988096B2 (ja) 2012-08-01
ES2165342T3 (es) 2006-03-01
FR2809418B1 (fr) 2003-05-16

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