JPH07292423A - Continuous heat treatment method for metal strip - Google Patents
Continuous heat treatment method for metal stripInfo
- Publication number
- JPH07292423A JPH07292423A JP10739494A JP10739494A JPH07292423A JP H07292423 A JPH07292423 A JP H07292423A JP 10739494 A JP10739494 A JP 10739494A JP 10739494 A JP10739494 A JP 10739494A JP H07292423 A JPH07292423 A JP H07292423A
- Authority
- JP
- Japan
- Prior art keywords
- metal strip
- shape
- tension
- roll
- heating
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 85
- 238000010438 heat treatment Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000007547 defect Effects 0.000 abstract description 11
- 238000005096 rolling process Methods 0.000 abstract description 9
- 230000002950 deficient Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 28
- 239000010959 steel Substances 0.000 description 28
- 238000005485 electric heating Methods 0.000 description 12
- 238000000137 annealing Methods 0.000 description 9
- 229910000655 Killed steel Inorganic materials 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
(57)【要約】
【目的】 通電ロールを介して金属帯に電流を通し、ジ
ュール熱により金属帯を加熱する際、別個の形状矯正装
置を必要とせず形状不良を矯正すると同時に、通電加熱
に伴う形状不良の発生を防止する。
【構成】 高温側通電ロール３部で金属帯１を０．１〜
１０％延伸させながら通電加熱する。金属帯１の延伸量
の制御は、高温側通電ロール３部で金属帯１の張力およ
び／またはロール圧下力を調整することにより行う。金
属帯１の張力を、金属帯の降伏応力の関数で示される形
状不良を発生させない範囲となるように制御する。
【効果】 金属帯を加熱すると同時に形状矯正すること
が可能となり、後工程に形状の良好な金属帯を供給する
ことができ、コンパクトで安価な連続熱処理が可能とな
る。
(57) [Abstract] [Purpose] When a current is passed through a metal strip through an energizing roll and the metal strip is heated by Joule heat, a separate shape straightening device is not required to correct the shape defect and at the same time to energize the heating. It prevents the occurrence of defective shapes. [Structure] The metal strip 1 is 0.1 to 3 times on the high temperature side energizing roll
Electrical heating is performed while stretching 10%. The amount of stretching of the metal strip 1 is controlled by adjusting the tension of the metal strip 1 and / or the roll rolling force at the high temperature side energizing roll 3 part. The tension of the metal strip 1 is controlled so as to fall within a range that does not cause the defective shape indicated by the function of the yield stress of the metal strip. [Effect] The metal strip can be heated and the shape thereof can be corrected at the same time, and the metal strip having a good shape can be supplied to the subsequent process, and the compact and inexpensive continuous heat treatment can be performed.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、たとえば薄鋼板の連続
焼鈍のように金属帯を連続熱処理するため通電加熱する
金属帯の連続熱処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous heat treatment method for a metal strip, in which a metal strip is continuously heated so as to continuously heat treat the metal strip such as continuous annealing of a thin steel sheet.
【０００２】[0002]
【従来の技術】冷延鋼板等の金属帯を連続熱処理するた
めの加熱方法としては、特公昭６０−２６８１８号公報
に記載されているように、金属帯に通電ロールを介して
直接通電し、金属帯自体のジュール熱により加熱する方
法がある。また、特開平１−１４２０３２号公報、特開
平１−１８７７８９号公報に記載されているように、環
状トランスを貫通する金属帯通路の前後に通電ロールを
設け、両通電ロールを導電性部材で接続して金属帯、通
電ロールおよび導電性部材により閉回路を構成し、環状
トランスに外部電源から交流電流を通電することにより
上記閉回路を二次コイルとして誘導電流を発生させ、こ
の誘導電流によるジュール熱で金属帯を加熱する方法が
ある。2. Description of the Related Art As a heating method for continuously heat treating a metal strip such as a cold-rolled steel sheet, as described in Japanese Patent Publication No. 60-26818, the metal strip is directly energized via an energizing roll, There is a method of heating by the Joule heat of the metal band itself. Further, as described in Japanese Patent Application Laid-Open Nos. 1-142032 and 1-187789, current-carrying rolls are provided in front of and behind a metal band passage that penetrates an annular transformer, and both current-carrying rolls are connected by a conductive member. Then, a closed circuit is constituted by the metal band, the current-carrying roll and the conductive member, and an induction current is generated by using the closed circuit as a secondary coil by supplying an alternating current from an external power source to the annular transformer. There is a method of heating the metal strip with heat.
【０００３】これら金属帯に直接電流を通し、ジュール
熱で加熱する方法は、直火型無酸化加熱、輻射管加熱、
間接電気加熱等の伝熱による加熱に比べて単位時間当た
りの加熱能力が高く、設備をコンパクトにすることがで
き、また熱応答性が非常に良いことから加熱制御が容易
である等の点で優れている。A method of directly applying an electric current to these metal strips and heating them with Joule heat is as follows: direct fire type non-oxidizing heating, radiation tube heating,
Compared with heating by heat transfer such as indirect electric heating, the heating capacity per unit time is higher, the equipment can be made compact, and the heat response is very good, so heating control is easy. Are better.
【０００４】[0004]
【発明が解決しようとする課題】前記通電加熱方法はい
ずれも通電ロールを介して金属帯に通電する。そして、
通電ロールは金属帯の加熱開始側の端と終了側の端とで
金属帯に接触し通電する必要があるが、スパーク発生を
防止するために金属帯を通電ロールと押さえロールで挟
持し、一定の圧下をかけざるを得ない。そのため、通電
ロール近傍での金属帯の蛇行、加熱終了側の端での高温
の金属帯と通電ロールとの接触による急冷等に起因する
形状不良が発生するという問題がある。特に金属帯とし
て板厚０．５ｍｍ以下の薄鋼板を焼鈍温度６００〜９０
０℃で連続焼鈍する場合など形状不良の発生が著しい。In any of the above-mentioned electric heating methods, the electric current is applied to the metal strip through the electric current roll. And
The energizing roll needs to contact the metal strip at the end of the heating start side and the end of the heating end of the metal strip to energize it, but in order to prevent the occurrence of sparks, the metal strip is sandwiched between the energizing roll and the pressing roll, and is kept constant. I have no choice but to apply a reduction. Therefore, there is a problem that a shape defect occurs due to meandering of the metal strip near the energizing roll and rapid cooling due to contact between the high temperature metal strip at the end on the heating end side and the energizing roll. In particular, a thin steel sheet having a thickness of 0.5 mm or less is used as a metal strip, and the annealing temperature is 600 to 90
Occurrence of defective shapes is remarkable when continuous annealing is performed at 0 ° C.
【０００５】ところで、焼鈍のため熱処理する金属帯
は、それ以前の工程で耳波や中伸びといった形状不良を
有することがある。そして、形状不良の金属帯を通電ロ
ールと押さえロールで挟持して通板すると、金属帯が蛇
行して形状不良が一層激しくなったり、金属帯の破断に
つながる危険がある。By the way, the metal band to be heat-treated for annealing may have a shape defect such as a selvage and an intermediate elongation in the previous process. When a metal strip having a poor shape is sandwiched between a current-carrying roll and a pressing roll and passed through the plate, the metal strip meanders, resulting in a more severe shape defect and a risk of breaking the metal strip.
【０００６】この金属帯の蛇行を防止するため、たとえ
ば特開昭６２−６７１２２号公報には、竪型連続焼鈍炉
の入側で金属帯を予め平坦に形状矯正した後焼鈍する方
法が記載されている。また、特願平４−３０４４５１号
明細書には、金属帯を０．１〜２％圧下した後、前述の
通電加熱を行う方法が記載されている。In order to prevent the metal strip from meandering, for example, JP-A-62-67122 describes a method in which the metal strip is preliminarily flattened on the inlet side of a vertical continuous annealing furnace and then annealed. ing. In addition, Japanese Patent Application No. 4-304451 describes a method in which the metal strip is pressed down by 0.1 to 2% and then the above-mentioned electric heating is performed.
【０００７】しかし、前述の方法はいずれも形状矯正後
に焼鈍する方法であり、焼鈍装置とは別個に形状矯正装
置が必要となる。However, all of the above-mentioned methods are methods of annealing after shape correction, and a shape correction apparatus is required separately from the annealing apparatus.
【０００８】また、通電加熱に伴って金属帯進行方向に
矩形状の縦筋が発生する形状不良について、特願平５−
１０１８０８号明細書においては、通電ロールとの接触
伝熱による金属帯の温度降下量を規定することによって
形状不良を防止できるとされている。Further, regarding a shape defect in which a rectangular vertical stripe is generated in the traveling direction of the metal band due to heating by energization, Japanese Patent Application No.
According to the specification of 101808, it is said that defective shapes can be prevented by defining the temperature drop amount of the metal strip due to heat transfer by contact with the energizing roll.
【０００９】しかし、薄鋼板の連続焼鈍では板幅が広が
るほど、鋼板の急冷防止だけでは形状不良を防止できな
いことが明らかになってきた。形状不良の発生原因が、
鋼板急冷ばかりでなく、加熱装置内で鋼板の両端を挟持
されたまま急速加熱されることにより、鋼板の熱膨張が
拘束されることに伴う圧縮応力が鋼板にかかり、それが
高温側通電ロール部を通過する際残留応力となり、高温
側通電ロール部を通過後解放されるためと推定される。However, it has become clear that in continuous annealing of thin steel sheets, as the sheet width increases, it is not possible to prevent the defective shape only by preventing the rapid cooling of the steel sheet. The cause of defective shape is
Not only the steel plate is rapidly cooled, but also the steel plate is rapidly heated while holding both ends of the steel plate in the heating device, so that a compressive stress is applied to the steel plate due to the restraint of the thermal expansion of the steel plate. It is presumed that the residual stress is generated when passing through the high temperature side and is released after passing through the high temperature side energizing roll part.
【００１０】以上のように、これまでの方法は、金属帯
の通電加熱に伴って発生する形状不良にすべて対応する
ことはできない。そこで本発明は、別個の形状矯正装置
を必要とせずに形状不良を矯正でき、通電加熱に伴う形
状不良の発生も防止可能な連続熱処理方法を提供する。As described above, the above-described methods cannot deal with all the defective shapes that occur when the metal strip is heated by electricity. Therefore, the present invention provides a continuous heat treatment method capable of correcting a defect in shape without the need for a separate shape correcting device and preventing the occurrence of a defect in shape due to electric heating.
【００１１】[0011]
【課題を解決するための手段】本発明は、通電ロールを
介して金属帯に電流を通し、ジュール熱により金属帯を
通電加熱して連続熱処理する方法において、高温側通電
ロール部で金属帯を０．１〜１０％延伸させながら通電
加熱することを特徴とする金属帯の連続熱処理方法であ
る。好ましくは、金属帯の延伸は、高温側通電ロール部
で金属帯の張力および／またはロール圧下力を調整する
ことにより制御する。さらに好ましくは、高温側通電ロ
ール部で金属帯の張力を最大７ｋｇ／ｍｍ2 以下とし、
かつ金属帯の張力ＵＴ（ｋｇ／ｍｍ2 ）を加熱温度Ｔ
（℃）における金属帯の降伏応力σ y （Ｔ）（ｋｇ／ｍ
ｍ2 ）との関係式（１）数２を満足する張力によって延
伸させる。SUMMARY OF THE INVENTION The present invention provides an energizing roll.
An electric current is passed through the metal strip via the
In the method of continuous heating by electric heating, energization on the high temperature side
Energize while stretching the metal strip 0.1 to 10% in the roll section
It is a continuous heat treatment method for a metal strip characterized by heating.
It Preferably, the stretching of the metal strip is performed on the high temperature side energizing roll portion.
To adjust the tension and / or roll rolling force of the metal strip
To control. More preferably, the high temperature side energization filter
The tension of the metal strip at the maximum is 7 kg / mm2Below,
And the tension of the metal strip UT (kg / mm2) Heating temperature T
Yield stress σ of metal band at (℃) y(T) (kg / m
m2) With relational expression (1)
To stretch.
【００１２】[0012]
【数２】 ０．５σy （Ｔ）≦ＵＴ≦２．５σy （Ｔ） …（１）## EQU2 ## 0.5σ y (T) ≦ UT ≦ 2.5σ y (T) (1)
【００１３】[0013]
【作用】本発明では、金属帯を通電加熱して連続熱処理
する方法において、通電加熱の加熱終了側の高温側通電
ロール部で金属帯を０．１〜１０％延伸させながら通電
加熱することにより金属帯の形状不良を矯正すると同時
に、通電加熱に伴う形状不良の発生も防止する。すなわ
ち、図１に示すように、金属帯１に低温側通電ロール２
と高温側通電ロール３を介して通電し、金属帯１自体の
ジュール熱により金属帯１を加熱する際、高温側通電ロ
ール３部において金属帯１を引き延ばしながら通電加熱
するのである。According to the present invention, in the method of continuously heat-treating a metal strip by electrically heating it, the metal strip is stretched by 0.1 to 10% in the high-temperature side current-carrying roll portion on the heating end side of the current-carrying heating. At the same time as correcting the shape defect of the metal strip, the occurrence of the shape defect due to electric heating is prevented. That is, as shown in FIG.
When the metal strip 1 is heated by the Joule heat of the metal strip 1 itself by being energized through the high temperature side energization roll 3, the metal strip 1 is stretched and heated by energization in the high temperature side energization roll 3 part.
【００１４】熱処理以前で発生した耳波、中伸び等の形
状不良は、金属帯１を一様に引き延ばすことにより容易
に矯正される。その上、通電加熱に伴う形状不良も、原
因となる金属帯１内の残留応力が、金属帯１を通電ロー
ルと押さえロールで挟持され拘束されたまま一方向に引
き延ばすことによって解放されるために、発生防止が可
能となるのである。Defects such as seismic waves and medium elongation that occur before the heat treatment can be easily corrected by uniformly stretching the metal strip 1. In addition, the residual stress in the metal strip 1 which causes the defective shape due to the electric heating is released by stretching the metal strip 1 in one direction while being held and constrained by the electric roll and the pressing roll. Therefore, it is possible to prevent the occurrence.
【００１５】図２は、金属帯１として板厚０．１５〜
０．２４ｍｍ、板幅９００ｍｍの０．０５％Ｃ含有アル
ミキルド鋼板を、図１に示す通電加熱装置を用い、板
温、張力、圧下力を変化させて通電加熱後の鋼板の延伸
量を測定した結果の一例である。このように金属帯１の
延伸量は、金属帯１の張力とロール圧下力とを調整する
ことにより制御することができる。FIG. 2 shows a metal strip 1 having a plate thickness of 0.15 to 0.15.
A 0.05% C-containing aluminum-killed steel plate having a width of 0.24 mm and a plate width of 900 mm was measured by changing the plate temperature, tension, and rolling force using the electric heating apparatus shown in FIG. It is an example of a result. In this way, the amount of stretching of the metal strip 1 can be controlled by adjusting the tension of the metal strip 1 and the roll rolling force.
【００１６】ただし、強圧下力で金属帯１を延伸させる
と、たとえば、耳波や中伸びのような局部伸びを生じや
すい。むしろ、スパークを防止できる最小限の圧下力を
確保した上で金属帯１への張力で延伸量を制御した方
が、全板幅に渡り一様に伸ばせること、また、形状不良
の金属帯を通板しやすいことから、より効果的である。However, when the metal strip 1 is stretched by a strong reduction force, for example, a local stretch such as an ear wave or a middle stretch is likely to occur. Rather, it is better to control the stretching amount by the tension to the metal strip 1 after securing the minimum rolling force that can prevent sparks, so that the metal strip with uniform shape can be stretched over the entire plate width, and the metal strip having a bad shape can be removed. It is more effective because it can be easily threaded.
【００１７】図３は、図２と同様な方法で、ロール圧下
力を２．０ｋｇ／ｍｍ一定として、鋼板の張力と温度を
変化させて鋼板の延伸量を測定した結果の一例である。
図３は、鋼板の延伸量が鋼板の張力と温度の変化に応じ
て大きく変化することを示している。すなわち、被加熱
材の物性に応じて張力を適正な値に選ぶことにより、鋼
板形状を制御できることがわかる。FIG. 3 shows an example of the result of measuring the amount of stretching of the steel sheet by changing the tension and temperature of the steel sheet with the roll rolling force kept constant at 2.0 kg / mm in the same manner as in FIG.
FIG. 3 shows that the amount of stretching of the steel sheet changes greatly according to changes in the tension and temperature of the steel sheet. That is, it can be seen that the steel plate shape can be controlled by selecting an appropriate value for the tension according to the physical properties of the material to be heated.
【００１８】そこで、物性値の異なる０．００２％Ｃ含
有の極低炭素鋼板を図２と同様な方法で通電加熱し、鋼
板形状を観察した結果を、前記アルミキルド鋼板の結果
と合わせて図４に示した。この図から、良好な鋼板形状
を得るための張力範囲を求めることができる。すなわ
ち、張力によって金属帯の延伸される量は、金属帯の降
伏応力に依存し、金属帯の降伏応力は金属帯の温度と組
成に大きく依存することから、加熱温度Ｔ（℃）におけ
る金属帯の降伏応力をσy （Ｔ）（ｋｇ／ｍｍ2）とす
ると、金属帯の張力を０．５×σy （Ｔ）以上にすれ
ば、特に板厚０．５ｍｍ以下の薄鋼板を６００〜９００
℃に加熱しても、形状良好な鋼板が得られる。一方、金
属帯の張力を２．５×σy （Ｔ）以上にすると、過大伸
びが発生し、幅縮みが大きくなるばかりでなく、極端な
場合には板破断に繋がる。以上から、関係式（１）で示
した形状良好な鋼板を得るための張力範囲が得られた。
尚、特に薄鋼板の通板においては、張力が７ｋｇ／ｍｍ
2 を越えると加熱装置以外の例えばデフレクターロール
やテンションリール部でバックリングを起こしやすくな
るために、最大張力は７ｋｇ／ｍｍ2 以下とする。Therefore, an extremely low carbon steel sheet containing 0.002% C having different physical properties was electrically heated in the same manner as in FIG. 2, and the results of observing the steel sheet shape were combined with the results of the aluminum-killed steel sheet as shown in FIG. It was shown to. From this figure, the tension range for obtaining a good steel plate shape can be obtained. That is, the amount by which the metal strip is stretched by the tension depends on the yield stress of the metal strip, and the yield stress of the metal strip largely depends on the temperature and composition of the metal strip. Therefore, the metal strip at the heating temperature T (° C.) If the yield stress of σ y (T) (kg / mm 2 ) is set to 0.5 × σ y (T) or more, a thin steel sheet with a thickness of 0.5 mm or less is 600 to 900
A steel plate having a good shape can be obtained even when heated to ℃. On the other hand, when the tension of the metal strip is 2.5 × σ y (T) or more, excessive elongation occurs, not only the width shrinkage increases, but also the sheet breaks in an extreme case. From the above, the tension range for obtaining the steel plate having a good shape shown by the relational expression (1) was obtained.
Note that the tension is 7 kg / mm especially when passing thin steel plates.
If it exceeds 2 , buckling is likely to occur in a deflector roll or a tension reel portion other than the heating device. Therefore, the maximum tension is 7 kg / mm 2 or less.
【００１９】これにより、焼鈍と形状矯正の同時処理が
可能となる。伸び量については、０．１％未満では形状
矯正の効果がなく、１０％を越えると金属帯の幅が縮ま
り、寸法精度が悪くなってしまうので、０．１〜１０％
とする。This makes it possible to perform annealing and shape correction simultaneously. Regarding the elongation amount, if it is less than 0.1%, there is no shape-correcting effect, and if it exceeds 10%, the width of the metal band shrinks and the dimensional accuracy deteriorates.
And
【００２０】[0020]
【実施例１】図１に示す通電加熱装置を用い、急峻度
１．０％の耳波を有する０．０５％Ｃ含有０．２０ｔ×
８５０ｗアルミキルド鋼板を高温側通電ロール３部で圧
下力２．５ｋｇ／ｍｍ、張力２ｋｇ／ｍｍ2 をかけ、７
５０℃に通電加熱した。高温側通電ロール３出側にＶＴ
Ｒカメラ６を設け、ＶＴＲカメラ６で鋼板形状を観察し
ながら、鋼板の延伸量を測定した。その結果、鋼板は
０．３％延伸され、加熱前の耳波形状が矯正されたばか
りでなく、通電加熱に伴う形状不良も発生せず、良好な
形状の鋼板が得られた。Example 1 Using the electric heating apparatus shown in FIG. 1, 0.05% C-containing 0.20 t × having an ear wave having a steepness of 1.0%
A 850w aluminum-killed steel plate is applied with a rolling force of 2.5 kg / mm and a tension of 2 kg / mm 2 by 3 parts of the high temperature side energizing rolls, and 7
It was electrically heated to 50 ° C. VT on high temperature side energizing roll 3 exit side
The R camera 6 was provided, and the amount of stretching of the steel sheet was measured while observing the steel sheet shape with the VTR camera 6. As a result, the steel sheet was stretched by 0.3% to not only correct the selvage wave shape before heating, but also to avoid a shape defect due to electric heating and obtain a steel sheet having a good shape.
【００２１】[0021]
【実施例２】図１に示す通電加熱装置を用い、０．０５
％Ｃ含有０．２０ｔ×８５０ｗアルミキルド鋼板と０．
００２％Ｃ含有０．２０ｔ×８５０ｗ極低炭素鋼板を実
施例１と同様な方法で加熱した。ロール圧下力は２．０
ｋｇ／ｍｍ一定、板温はともに８００℃、そしてアルミ
キルド鋼板には３ｋｇ／ｍｍ2 、極低炭素鋼板には２．
５ｋｇ／ｍｍ2 と８００℃における各鋼板の降伏応力に
等しい張力を設定した。その結果、いずれの材料も１．
７％延伸され、良好な形状の鋼板が得られた。Example 2 Using the electric heating device shown in FIG.
% C-containing 0.20t x 850w aluminum-killed steel plate and 0.
A 0.20t × 850w ultra low carbon steel sheet containing 002% C was heated in the same manner as in Example 1. Roll rolling force is 2.0
Constant kg / mm, plate temperature of 800 ° C., 3 kg / mm 2 for aluminum-killed steel plate, and 2. for ultra-low carbon steel plate.
A tension equal to the yield stress of each steel plate at 5 kg / mm 2 and 800 ° C was set. As a result, both materials have 1.
It was stretched by 7% and a steel sheet having a good shape was obtained.
【００２２】[0022]
【発明の効果】本発明により、別個の形状矯正装置を必
要とせず、金属帯を加熱すると同時に形状矯正すること
が可能となり、後工程に形状の良好な金属帯を供給する
ことができ、コンパクトで安価な連続熱処理が可能とな
る。EFFECTS OF THE INVENTION According to the present invention, it is possible to heat a metal strip and straighten it at the same time without requiring a separate shape straightening device, and to supply a metal strip having a good shape in a subsequent process, which is compact. Therefore, inexpensive continuous heat treatment is possible.
【図１】本発明を実施するための通電加熱装置の例を示
す図である。FIG. 1 is a diagram showing an example of an electric heating device for carrying out the present invention.
【図２】金属帯の伸びと板温、張力、圧下力との関係を
示す図である。FIG. 2 is a diagram showing a relationship between elongation of a metal strip and plate temperature, tension, and rolling force.
【図３】金属帯の伸びと板温、張力との関係を示す図で
ある。FIG. 3 is a diagram showing the relationship between the elongation of the metal strip, the plate temperature, and the tension.
【図４】張力と金属帯の降伏応力との関係を示す図であ
る。FIG. 4 is a diagram showing a relationship between tension and yield stress of a metal strip.
１ 金属帯 ２ 低温側通電ロール ３ 高温側通電ロール ４ 導電性部材 ５ 環状トランス ６ ＶＴＲカメラ 1 metal band 2 low temperature side energizing roll 3 high temperature side energizing roll 4 conductive member 5 annular transformer 6 VTR camera
───────────────────────────────────────────────────── フロントページの続き (72)発明者 福山 勝 兵庫県姫路市広畑区富士町１ 新日本製鐵 株式会社広畑製鐵所内 (72)発明者 佐藤 和彦 兵庫県姫路市広畑区富士町１ 新日本製鐵 株式会社広畑製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsu Fukuyama 1 Fuji-machi, Hirohata-ku, Himeji-shi, Hyogo New Nippon Steel Corporation Hirohata Works (72) Inventor Kazuhiko Sato 1 Fuji-machi, Hirohata-ku, Himeji-shi, Hyogo Nippon Steel Corporation Hirohata Works
Claims (3)
し、ジュール熱により金属帯を通電加熱して連続熱処理
する方法において、高温側通電ロール部で金属帯を０．
１〜１０％延伸させながら通電加熱することを特徴とす
る金属帯の連続熱処理方法。1. A method in which a current is passed through a metal strip through an energizing roll and the metal strip is electrically heated by Joule heat to continuously heat-treat the metal strip at a high temperature side energizing roll.
A continuous heat treatment method for a metal strip, which comprises electrically heating while stretching 1 to 10%.
び／またはロール圧下力を調整することにより金属帯を
延伸させることを特徴とする請求項１記載の金属帯の連
続熱処理方法。2. The continuous heat treatment method for a metal strip according to claim 1, wherein the metal strip is stretched by adjusting the tension and / or roll reduction force of the metal strip at the high temperature side energizing roll portion.
大７ｋｇ／ｍｍ2 以下とし、かつ金属帯の張力ＵＴ（ｋ
ｇ／ｍｍ2 ）を加熱温度Ｔ（℃）における金属帯の降伏
応力σy （Ｔ）（ｋｇ／ｍｍ2 ）との関係式（１）数１
を満足する張力によって延伸させることを特徴とする請
求項１または２記載の金属帯の連続熱処理方法。 【数１】 ０．５σy （Ｔ）≦ＵＴ≦２．５σy （Ｔ） …（１）3. The tension of the metal strip is 7 kg / mm 2 or less at the maximum at the high temperature side energizing roll portion, and the tension of the metal strip UT (k
g / mm 2 ) is related to the yield stress σ y (T) (kg / mm 2 ) of the metal strip at the heating temperature T (° C.) (1) Formula 1
The continuous heat treatment method for a metal strip according to claim 1 or 2, wherein the stretching is performed by a tension satisfying the above condition. ## EQU1 ## 0.5σ y (T) ≦ UT ≦ 2.5σ y (T) (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10739494A JP3348974B2 (en) | 1994-04-25 | 1994-04-25 | Continuous heat treatment method for metal strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10739494A JP3348974B2 (en) | 1994-04-25 | 1994-04-25 | Continuous heat treatment method for metal strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07292423A true JPH07292423A (en) | 1995-11-07 |
| JP3348974B2 JP3348974B2 (en) | 2002-11-20 |
Family
ID=14458032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10739494A Expired - Lifetime JP3348974B2 (en) | 1994-04-25 | 1994-04-25 | Continuous heat treatment method for metal strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3348974B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406572A (en) * | 2018-12-10 | 2019-03-01 | 东北大学 | A kind of sheet metal strip transvercal induction heating experimental device and method |
-
1994
- 1994-04-25 JP JP10739494A patent/JP3348974B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406572A (en) * | 2018-12-10 | 2019-03-01 | 东北大学 | A kind of sheet metal strip transvercal induction heating experimental device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3348974B2 (en) | 2002-11-20 |
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