WO2005070576A1 - 鋼板の熱処理装置とそれを備えた鋼板の製造ライン - Google Patents
鋼板の熱処理装置とそれを備えた鋼板の製造ライン Download PDFInfo
- Publication number
- WO2005070576A1 WO2005070576A1 PCT/JP2005/000946 JP2005000946W WO2005070576A1 WO 2005070576 A1 WO2005070576 A1 WO 2005070576A1 JP 2005000946 W JP2005000946 W JP 2005000946W WO 2005070576 A1 WO2005070576 A1 WO 2005070576A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel sheet
- heat treatment
- roll
- induction heating
- pressing
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0242—Flattening; Dressing; Flexing
-
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
- 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
- C21D9/60—Continuous furnaces for strip or wire with induction heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates to a heat treatment apparatus for heat treating a steel sheet after hot rolling, and more particularly to a heat treatment apparatus using an induction heating apparatus, and a heat treatment apparatus using the same.
- the present invention relates to a manufacturing line for a steel plate provided with the above.
- BACKGROUND ART Steel sheets after hot rolling are often quenched by quenching or accelerated cooling in order to increase strength and toughness, and then are often subjected to tempering.
- quenching and accelerated cooling have been performed online, but the tempering process is still performed offline using a batch-type heating furnace, so it takes a long time. Is significantly inhibited. For this reason, several methods have been proposed for performing a tempering process using an induction heating device capable of rapid heating in a short time.
- Japanese Patent Application Laid-Open No. 48-25239 discloses that a plurality of induction heating devices are arranged, and when a steel sheet is continuously heat-treated, the end of the steel sheet is placed before the last induction heating device is charged with the steel sheet.
- a method is disclosed in which a part is water-cooled and heat treated uniformly over the width direction of the steel sheet.
- Japanese Patent Application Laid-Open No. 48-252237 discloses that when the front end of a metal material is inserted into an induction heating device, the rear end of the metal material is inserted into the induction heating device at the outlet of the induction heating device.
- a method of uniformly heating a metal material by disposing a heating element at an inlet of the induction heating device and heating a front end and a rear end of the metal material at the time of the heating is disclosed.
- JP-A-2003-13133 discloses a method in which a steel sheet accelerated and cooled after hot rolling on the same line is heat-treated by an induction heating device.
- an induction heating device when the steel sheet is rapidly heated using an induction heating device, it is difficult to uniformly heat-treat the steel sheet in the width direction and the longitudinal direction, and the steel sheet is warped.
- a wide steel sheet is apt to cause a large warpage, so if the steel sheet is provided with a plurality of induction heating devices, it may collide with the next induction heating device and significantly impede the conveyance of the steel sheet.
- the target heat treatment cannot be performed.
- JP-A-2003-13133 also proposes a method of arranging a hot leveler downstream of an induction heating device in order to correct the warpage of a steel sheet after heat treatment. Because it is a complicated device, it cannot be placed close to the induction heating device, and if there are multiple induction heating devices, it cannot be placed between adjacent induction heating devices. It is not possible to prevent the collision between the steel sheet and the transfer port ⁇ induction heating device.
- DISCLOSURE OF THE INVENTION The present invention is to provide a heat treatment apparatus for a steel sheet that can perform a target heat treatment without disturbing the conveyance of the steel sheet even by using an induction heating apparatus, and a production line for a steel sheet including the same. Aim.
- the above object has a plurality of transport rolls for transporting the steel sheet horizontally, and at least one induction heating device for heating the steel sheet, wherein the induction heating device is disposed between predetermined adjacent transport rolls.
- At least one pressing roll for pressing the steel sheet from above is provided on the exit side of the induction heating device that is at least upstream of the induction heating device, and at least the pressing roll that is at the most upstream of the pressing rolls Is achieved by a heat treatment apparatus for a steel sheet which is arranged above the transport roll on the exit side of the induction heating device and opposite to the transport roll.
- FIGS. 1A to 1G are diagrams showing the arrangement of a pressing roll.
- Figure 2 is a diagram that defines the warp height h of the steel sheet.
- FIG. 3 is a diagram showing a relationship between the arrangement conditions of the pressing rolls in FIGS. 1A to 1G and the warp height h of the steel sheet.
- FIG. 4 is a diagram showing an example in which a pressing roll and a transport roll are connected by a conductive wire.
- FIG. 5 is a diagram showing an example of a production line of the present invention.
- FIG. 6 is a diagram showing another example of the production line of the present invention. MODES FOR CARRYING OUT THE INVENTION The present inventors used a steel plate having a thickness of 40 thighs and a width of 2,000 thighs, and heat-treated with a solenoid-type induction heating device provided between conveyance rolls. The following examination was carried out for the warpage.
- a pressing roll 2 for pressing a steel plate 4 from above against a transport roll 3 is disposed above a transport roll 3 on an entrance side or an exit side of the induction heating device 1.
- the pressing roll 2 After heating so that the surface temperature of the steel sheet rises by 60 ° C, the pressing roll 2 is pressed against the steel sheet 4 with a pressing force of 80000 N, and the warp height of the tip of the steel sheet 4 on the exit side of the induction heating device 1.
- h was determined.
- the warpage height h is a height measured from the surface of the steel sheet 4 when the highest point of the warped steel sheet 4 does not warp, as shown in FIG.
- Fig. 3 shows the relationship between the arrangement of the pressing rolls shown in Figs. 1A to 1G and the warpage height h.
- the warp height is 20. mm or less, and the steel plate 4 Collision can be prevented. Further, since the warpage of the steel sheet 4 is suppressed, the steel sheet 4 is more uniformly heated in the induction heating device 1.
- the pressing roll 2 is placed above the first transport roll 3 from the induction heating device 1 as in C or E, the pressing roll 2 is placed in the second transport port 3 from the induction heating device 1 as shown in D. Even if it is arranged above, warpage of the steel sheet 4 can be suppressed. In this case, in order to prevent the tip of the steel plate 4 from colliding with the pusher 2 or climbing on the pusher 2, the leading end of the steel plate 4 is placed between the presser roll 2 from the exit side of the induction heating device 1. A guide roll or the like that presses the tip of the steel plate 4 and guides it to the roll 2 can be provided. It should be noted that the same effect can be obtained even if it is arranged above the third and subsequent transport rolls 3.
- a plurality of pressing holes are provided above the plurality of transport rolls 3 between the induction heating devices 1. 2 can be arranged.
- the pressing roll 2 at the most upstream does not necessarily need to be disposed directly above the transport roll 3, but is disposed so that the pressing roll 2 and the transport roll 3 apply a pressing force to the steel sheet 4. Just do it.
- the warp height exceeds 40 mm, and the steel plate 4 is located on the transport roll 3 or downstream.
- the danger of collision with the induction heating device 1 is very high.
- the warp of the steel sheet can be suppressed by providing a pressing roll at least on the exit side of the induction heating device at the most upstream position.
- the reason is that the most upstream induction heating device has a large temperature rise when heating the steel sheet, and the steel sheet is easily warped.
- the induction heating device other than the most upstream induction heating device may be heated with a large amount of temperature increase. Therefore, a pressing roll can be provided on the exit side of such an induction heating device. Further, the pressing force by the pressing roll 2 is constant because the width of the steel sheet is fixed in the above examination, but it is necessary to appropriately change the pressing force according to the width of the steel sheet.
- a sheet width of 1500 imn or less requires a pressing force of 100000 N or more, and a sheet width of about 2000 mm requires a pressing force of 60,000 N or more.
- a pressing force of about 20000 N is sufficient.
- the pressing roll only needs to be a roll that can rotate freely around its axis.However, the transfer speed of the steel sheet may change due to the electromagnetic force from the induction heating device. Is preferred.
- the steel plate When a large warped steel sheet passes over the pressing roll, the steel plate cannot be pushed by the pressing roller, so the diameter of the pressing hole is determined by the vertical distance of the opening of the induction heating device. It is preferable to make it larger than 1/2.
- sparks are generated between the steel sheet and the pressing roll and the transport roll, and the wedge of the steel sheet is damaged or spark marks are formed on the roll surface. There is. This is because the magnetic flux leaking from the induction heating device induces an induced current in a closed circuit formed by the steel sheet and the pressing port and the transfer port, and the steel sheet and the pressing port and the transfer roll are vibrated and warped.
- the electric resistance of the pressing roll and the transporting roll is made higher than the electrical resistance of the steel plate. As shown in Fig. 4, the pressing roll 2 and the transporting roll 3 are connected by conductive wire 5, It is effective to form a closed circuit.
- the electric resistance of the needle can be reduced by using a roll made of a high alloy steel such as stainless steel at least as the pressing roll or the transporting roll. Can be higher than resistance.
- a steel sheet production line if a line in which a hot rolling mill, an accelerated cooling device, and the above-described steel plate heat treatment device a of the present invention are arranged on the same line, higher productivity can be achieved. Steel plates can be manufactured stably.
- FIG. 5 shows an example of the production line of the present invention.
- the slab heated in the heating furnace 8 is rolled into a steel sheet 4 by a hot rolling mill 10. After the hot rolling, the steel plate 4 is quenched by the accelerated cooling device 20 and heat-treated by the heat treatment device 30 to have desired characteristics.
- the heat treatment device 30 is composed of six induction heating devices 1, and on the exit side of the most upstream induction heating device 1, a pressing roll 2 is disposed immediately above the transport roll 3 and opposed to the transport roll 3. One is arranged.
- the steel sheet 4 that has been heat-treated by the induction heating device 1 is pressed by the pressing roll 2 with a pressing force corresponding to the width of the steel plate 4, so there is no significant warping. Can receive.
- the present heat treatment apparatus 30 has six induction heating apparatuses 1, the desired heat treatment can be performed in one pass.
- FIG. 6 shows another example of the production line according to the present invention.
- the configuration of the production line is the same as that of FIG. 5, but the number of the induction heating devices 1 of the heat treatment device 30 is three.
- one pressing roll 2 is disposed directly above the transport roll 3 on the exit side of the induction heating device 1 at the most upstream side and opposed to the transport roll 3.
- the present heat treatment apparatus 30 since there are only three induction heating apparatuses 1, it is preferable to perform the heat treatment in a reverse pass.
- the reverse pass it is not necessary to use the pressing roll 2 except for the first pass, but in that case, the pressing force may be set to zero.
- the induction heating device is a solenoid type with a frequency of 1500 Hz, the coil opening is 200 mm (height) X 5000 ⁇ ( ⁇ ⁇ ), the length is 2000 iran, and the maximum output is about 20 MW.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- General Induction Heating (AREA)
- Heat Treatment Of Articles (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05704090A EP1707282A4 (en) | 2004-01-21 | 2005-01-19 | HEAT TREATMENT DEVICE FOR STEEL PLATE AND STEEL PLATE MANUFACTURING STRIP WITH HEAT TREATMENT DEVICE |
US10/586,719 US20080236235A1 (en) | 2004-01-21 | 2005-01-19 | Heat-Treatment Apparatus for Steel Plate and Manufacturing Line of Steel Plate Having the Heat-Treatment Apparatus |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004013423 | 2004-01-21 | ||
JP2004-013423 | 2004-01-21 | ||
JP2004-077338 | 2004-03-18 | ||
JP2004077337A JP4457709B2 (ja) | 2004-03-18 | 2004-03-18 | 厚鋼板の熱処理装置 |
JP2004-077337 | 2004-03-18 | ||
JP2004077338 | 2004-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005070576A1 true WO2005070576A1 (ja) | 2005-08-04 |
Family
ID=34811784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/000946 WO2005070576A1 (ja) | 2004-01-21 | 2005-01-19 | 鋼板の熱処理装置とそれを備えた鋼板の製造ライン |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080236235A1 (ja) |
EP (1) | EP1707282A4 (ja) |
KR (1) | KR20060118587A (ja) |
TW (1) | TW200536942A (ja) |
WO (1) | WO2005070576A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104475449A (zh) * | 2014-11-21 | 2015-04-01 | 山东雷帕得汽车技术股份有限公司 | 全自动少片弹簧长锥轧制生产线 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101320154B1 (ko) * | 2011-06-28 | 2013-10-23 | 현대제철 주식회사 | 가열 공간 가변형 열처리 장치 |
DE102013224547A1 (de) | 2013-11-29 | 2015-06-03 | Sms Siemag Ag | Vorrichtung zur Temperaturerhöhung von länglichem metallischem Walzgut und Fertigstraße zum Erzeugen und/oder Bearbeiten von länglichem metallischem Walzgut |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03126208U (ja) * | 1990-03-29 | 1991-12-19 | ||
JPH0971819A (ja) * | 1995-09-04 | 1997-03-18 | Dai Ichi High Frequency Co Ltd | 小径金属円柱材の熱処理装置及びその装置の駆動制御方法 |
JP2003013133A (ja) * | 2001-06-26 | 2003-01-15 | Nkk Corp | 厚鋼板の熱処理方法および装置 |
JP2003129130A (ja) * | 2001-10-18 | 2003-05-08 | Nkk Corp | 厚鋼板の熱処理装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1501622A (en) * | 1972-02-16 | 1978-02-22 | Int Harvester Co | Metal shaping processes |
JPS5388614A (en) * | 1977-01-14 | 1978-08-04 | Mitsubishi Electric Corp | Induction heating apparatus |
DE4402402B4 (de) * | 1994-01-27 | 2004-05-13 | Sms Demag Ag | Verfahren zur Herstellung von warmgewalztem Stahlband aus stranggegossenem Vormaterial und Anlage zur Durchführung des Verfahrens |
JP3157989B2 (ja) * | 1994-07-05 | 2001-04-23 | モリ工業株式会社 | アングル材製造方法 |
EP0721813B1 (de) * | 1995-01-16 | 1999-01-27 | MANNESMANN Aktiengesellschaft | Vorrichtung zum Führen von warmgewalztem Band durch einen Induktor |
US5927118A (en) * | 1996-05-28 | 1999-07-27 | Nkk Corporation | Method for making hot-rolled steel sheet and apparatus therefor |
US5990464A (en) * | 1996-10-30 | 1999-11-23 | Nkk Corporation | Method for producing hot rolled steel sheet using induction heating and apparatus therefor |
JP3336964B2 (ja) * | 1998-07-22 | 2002-10-21 | 日本鋼管株式会社 | 金属板の誘導加熱装置 |
EP1452247B1 (en) * | 2001-10-10 | 2011-01-26 | JFE Steel Corporation | Method of manufacturing steel plate |
KR100418530B1 (ko) * | 2003-05-23 | 2004-02-14 | 주식회사 경인특수금속 | 전기가열식 압연장치 |
-
2005
- 2005-01-19 US US10/586,719 patent/US20080236235A1/en not_active Abandoned
- 2005-01-19 WO PCT/JP2005/000946 patent/WO2005070576A1/ja active Application Filing
- 2005-01-19 EP EP05704090A patent/EP1707282A4/en not_active Withdrawn
- 2005-01-19 KR KR1020067016433A patent/KR20060118587A/ko not_active Application Discontinuation
- 2005-01-21 TW TW094101803A patent/TW200536942A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03126208U (ja) * | 1990-03-29 | 1991-12-19 | ||
JPH0971819A (ja) * | 1995-09-04 | 1997-03-18 | Dai Ichi High Frequency Co Ltd | 小径金属円柱材の熱処理装置及びその装置の駆動制御方法 |
JP2003013133A (ja) * | 2001-06-26 | 2003-01-15 | Nkk Corp | 厚鋼板の熱処理方法および装置 |
JP2003129130A (ja) * | 2001-10-18 | 2003-05-08 | Nkk Corp | 厚鋼板の熱処理装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1707282A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104475449A (zh) * | 2014-11-21 | 2015-04-01 | 山东雷帕得汽车技术股份有限公司 | 全自动少片弹簧长锥轧制生产线 |
Also Published As
Publication number | Publication date |
---|---|
EP1707282A4 (en) | 2007-11-28 |
EP1707282A1 (en) | 2006-10-04 |
US20080236235A1 (en) | 2008-10-02 |
TW200536942A (en) | 2005-11-16 |
KR20060118587A (ko) | 2006-11-23 |
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