JPS5841329B2 - Straightening plate heating method in continuous heat treatment furnace - Google Patents
Straightening plate heating method in continuous heat treatment furnaceInfo
- Publication number
- JPS5841329B2 JPS5841329B2 JP9093279A JP9093279A JPS5841329B2 JP S5841329 B2 JPS5841329 B2 JP S5841329B2 JP 9093279 A JP9093279 A JP 9093279A JP 9093279 A JP9093279 A JP 9093279A JP S5841329 B2 JPS5841329 B2 JP S5841329B2
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- treatment furnace
- temperature
- zone
- straightening plate
- 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
Links
Landscapes
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】
本発明は連続熱処理炉における矯正板加熱方法に係り、
ことに燃料原単位の低減を図ることのできる矯正板加熱
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a straightening plate heating method in a continuous heat treatment furnace,
In particular, the present invention relates to a straightening plate heating method that can reduce fuel consumption.
鋼板歪の矯正は一般に冷間矯正と加熱矯正に大別される
。Straightening of steel plate distortion is generally divided into cold straightening and hot straightening.
加熱矯正は、鋼板歪がとヒ較的大きく、冷間では降伏点
が高くて矯正が困難と思われる鋼種を対象としており、
歪を有する鋼板である矯正板を、連続熱処理炉内で所定
の温度に加熱し、次いでこの矯正板を連続熱処理炉の後
位に配設したレベラーを通して矯正する方法である。Heat straightening is targeted at steel types that have relatively large strain and have a high yield point that would be difficult to straighten in cold conditions.
In this method, a straightening plate, which is a steel plate having a strain, is heated to a predetermined temperature in a continuous heat treatment furnace, and then the straightening plate is straightened through a leveler disposed after the continuous heat treatment furnace.
ところで鋼板の加熱温度はレベラーの圧下力仕様に基づ
いて決定されるのが普通で、例えば６００°Ｃにおける
鋼材の降伏点限界が規定された時、当該加熱温度は６０
０°Ｃ以上に設定する場合が多い。By the way, the heating temperature of the steel plate is usually determined based on the rolling force specifications of the leveler. For example, when the yield point limit of the steel material is specified at 600°C, the heating temperature is 60°C.
It is often set at 0°C or higher.
したがって歪の大小、降伏点の如何にかかわらず、燃料
消費量は加熱温度によって決定される。Therefore, regardless of the magnitude of strain or yield point, fuel consumption is determined by heating temperature.
一般に連続熱処理炉における各ゾーンの温度設定および
処理材の在炉時間は、抽出予定温度、処理材の板厚、幅
、規格等の諸条件によって決定され、これらの諸条件は
標準化されている。In general, the temperature setting of each zone in a continuous heat treatment furnace and the in-furnace time of the treated material are determined by various conditions such as the expected extraction temperature, the thickness, width, and specifications of the treated material, and these conditions are standardized.
本発明の対象とする矯正板においても例外ではなく、上
記の諸条件から連続熱処理炉の各ゾーンの設定温度およ
び在炉時間が決定される。The straightening plate that is the object of the present invention is no exception, and the set temperature and furnace time of each zone of the continuous heat treatment furnace are determined from the above conditions.
そしてゾーン設定温度は従来全ゾーンを同一温度にし、
当該温度を矯正板の抽出予定温度に設定するのが最も一
般的である。And the zone setting temperature is conventionally set to the same temperature in all zones,
Most commonly, this temperature is set to the expected extraction temperature of the straightening plate.
第１図は連続熱処理炉の概略を示す一例図、第２図は従
来方法に従って全ゾーンを６００’Ｃに設定した場合に
おける板厚が１０ｍｒｎの矯正板の在炉時間と鋼板温度
との関係を示すグラフである。Figure 1 is an example diagram showing the outline of a continuous heat treatment furnace, and Figure 2 shows the relationship between the furnace time and steel plate temperature of a straightened plate with a thickness of 10 mrn when all zones are set at 600'C according to the conventional method. This is a graph showing.
なお第１図において１ｚ〜１１ｚはゾーン、１２は鋼板
の進行方向を示す矢印、１３は加熱帯、１４は均熱帯、
１５は抽出ゾーンを示す。In Fig. 1, 1z to 11z are zones, 12 is an arrow indicating the direction of progress of the steel plate, 13 is a heating zone, 14 is a soaking zone,
15 indicates the extraction zone.
このように従来の矯正板加熱力法においては全ゾーンの
設定温度を同一にしていることから、加熱に要する燃料
消費量が高くなる不具合がある。As described above, in the conventional straightening plate heating power method, since the set temperature is the same for all zones, there is a problem that the amount of fuel consumed for heating increases.
なお燃料消費量を低減する方法として、在炉時間を短縮
する方法と、全ゾーンを同一温度にし、かつ設定温度を
従来よりも低くする方法が挙げられるが、前者は歪発生
の矯正板の大半が薄物であり、しかも炉内速度は駆動装
置の有する最大限界速度であるのが普通であるという事
実から、これ以上の速度を得るのは実際には困難である
と考えられる。Methods for reducing fuel consumption include shortening the furnace time and keeping all zones at the same temperature and setting the temperature lower than before. It is thought that it is actually difficult to obtain higher speeds due to the fact that the is a thin material and the speed in the furnace is usually the maximum speed limit of the drive device.
また後者はゾーン区分数が多い程、各ゾーンに矯正板の
位置する時間が短かく、したがって熱交換効率が低く、
結果的に無駄な熱量を加えることになってあまり効果的
でない。In addition, in the latter case, the more zones there are, the shorter the time that the straightening plate is located in each zone, and therefore the lower the heat exchange efficiency.
As a result, unnecessary heat is added, which is not very effective.
本発明は上記したような従来技術における実情に鑑みて
なされたもので、その目的とするところは、燃料原単位
の低減を図ることのできる連続熱処理炉における矯正板
加熱方法を提供することにある。The present invention has been made in view of the above-mentioned actual situation in the prior art, and its purpose is to provide a method for heating a straightening plate in a continuous heat treatment furnace that can reduce the fuel consumption rate. .
以下、本発明の矯正板加熱方法について説明する。Hereinafter, the straightening plate heating method of the present invention will be explained.
第３図は本発明の矯正板加熱方法を例示するヒートパタ
ーンの一実施例図で、縦軸はゾーン設定温度を、横軸は
第１図に示したゾーン、ことに加熱帯１３、および均熱
帯１４を示す。FIG. 3 is an example of a heat pattern illustrating the straightening plate heating method of the present invention, in which the vertical axis represents the zone setting temperature, and the horizontal axis represents the zones shown in FIG. 1, especially the heating zone 13 and the uniform temperature. Tropical 14 is shown.
この第３図に示すように本発明の矯正板加熱方法にあっ
ては、矯正板を加熱するに際し、連続熱処理炉の各ゾー
ンの温度を加熱帯１３から均熱帯１４にかけて徐々に低
位から高位の温度になるように設定しておく。As shown in FIG. 3, in the straightening plate heating method of the present invention, when heating the straightening plate, the temperature of each zone of the continuous heat treatment furnace is gradually increased from a low level to a high level from the heating zone 13 to the soaking zone 14. Set the temperature accordingly.
なお第１図に示す抽出ゾーン１５の温度は抽出予定温度
に設定する。Note that the temperature of the extraction zone 15 shown in FIG. 1 is set to the expected extraction temperature.
そしてこのようにゾーンの温度設定をした連続熱処理炉
に所定の矯正板を装入し、この矯正板を第１図の矢印１
２方向に進行させて加熱をおこなう。Then, a prescribed straightening plate is inserted into the continuous heat treatment furnace in which the temperature of the zone is set in this way, and this straightening plate is moved as indicated by the arrow 1 in Fig. 1.
Heating is performed by advancing in two directions.
上記した本発明の矯正板加熱方法においては加熱帯１３
の温度が抽出ゾーン１５の温度よりも低くて済むことか
ら、燃料原単位が低減する。In the straightening plate heating method of the present invention described above, the heating zone 13
Because the temperature of the extraction zone 15 is lower than that of the extraction zone 15, the fuel consumption rate is reduced.
なおこの場合、抽出時の鋼板速度は抽出ゾーン設定温度
よりも若干低くなるが、熱処理（Ｎ、Ｑ、Ｔ、Ａ等）と
異なり、焼戻処理後、コントロールトロ−リング材以外
では特別な制約はなく、この抽出時の鋼板温度がいわゆ
る矯正可能な範囲内の温度であれば実用上十分に足りる
。In this case, the steel plate speed during extraction will be slightly lower than the extraction zone set temperature, but unlike heat treatment (N, Q, T, A, etc.), after tempering, there are special restrictions for materials other than control trolling. It is sufficient for practical use that the temperature of the steel plate at the time of extraction is within the so-called correctable range.
第４図は第３図に示すヒートパターンを適用し抽出予定
温度を６００℃とした場合における板厚が１０關の矯正
板の在炉時間と鋼板温度との関係を示すグラフである。FIG. 4 is a graph showing the relationship between the furnace time and steel plate temperature of a straightening plate with a thickness of 10 mm when the heat pattern shown in FIG. 3 is applied and the expected extraction temperature is 600°C.
この第４図と上記した従来方法による第２図とを比較す
ると、第４図に示す本発明の方法の抽出時の鋼板温度は
２４°Ｃ低いことがわかるが、この温度差の降伏点に対
する影響は微少なものであり、矯正作業には何ら支障が
ない。Comparing this Fig. 4 with Fig. 2 according to the conventional method described above, it can be seen that the steel plate temperature at the time of extraction by the method of the present invention shown in Fig. 4 is 24°C lower. The effect is slight and does not pose any problem to the correction work.
本発明者は上記した本発明の方法の実施によって、燃料
原単位がたとえば従来は２５０×１１０３ｋ／１であっ
たものが１２０ Ｘ １０３ｋｃａｔ／ ｔで済むこと
を確認している。The present inventor has confirmed that by implementing the method of the present invention described above, the fuel consumption rate, which was conventionally 250 x 1103 kcat/t, can be reduced to 120 x 103 kcat/t.
以上述べたように本発明の矯正板加熱方法によれば燃料
原単位を５０φ以上低減できる効果がある。As described above, the straightening plate heating method of the present invention has the effect of reducing the fuel consumption rate by 50φ or more.
ざらにハースローラタイプの連続熱処理炉においては、
処理温度の低下により、クリープ応力の低下、サーマル
ショックの緩和が実現し、ハースロールの寿命が大幅に
延びる効果もある。In the Zarani hearth roller type continuous heat treatment furnace,
Lowering the processing temperature reduces creep stress and alleviates thermal shock, which also has the effect of significantly extending the life of hearth rolls.
第１図は連続熱処理炉の概略を示す一例園、第２図は従
来方法に従って全ゾーンを６００℃に設定した場合にお
ける板厚が１０山の矯正板の在炉時間と鋼板温度との関
係を示すグラフ、第３図は本発明の連続熱処理炉におけ
る矯正板加熱方法を説明するヒートパターンの一実施例
図、第４図は第３図に示すヒートパターンを適用し、抽
出予定温度を６００００とした場合における板厚がｉｏ
ａｍの矯正板の在炉時間と鋼板温度との関係を示すグラ
フである。
１ｚ〜１１ｚ・・・・・・ゾーン、１３・・・・・・加
熱帯、１４・・・・・・均熱帯、１５・・・・・・抽出
ゾーン。Figure 1 shows an example of the outline of a continuous heat treatment furnace, and Figure 2 shows the relationship between the furnace time and steel plate temperature for a straightened plate with a thickness of 10 when all zones are set at 600°C according to the conventional method. The graph shown in FIG. 3 is an example of a heat pattern explaining the straightening plate heating method in a continuous heat treatment furnace of the present invention, and FIG. 4 is an example of a heat pattern using the heat pattern shown in FIG. When the plate thickness is io
It is a graph showing the relationship between the furnace time of the am straightening plate and the steel plate temperature. 1z to 11z...zone, 13...heating zone, 14...soaking zone, 15...extraction zone.
Claims (1)
よび抽出ゾーンを備えた連続熱処理炉内で所定の温度ま
で加熱し、この連続処理炉の後位に設けたレベラーで矯
正する鋼板歪の矯正方法のうちの連続熱処理炉における
矯正板加熱方法において、矯正板を加熱するに際し、上
記連続熱処理炉の各ゾーンの温度を加熱帯から均熱帯に
かけて徐徐に低位から高位の温度になるように設定して
おくことを特徴とする連続熱処理炉における矯正板加熱
方法。1 A straightening plate, which is a steel plate with strain, is heated to a predetermined temperature in a continuous heat treatment furnace equipped with a heating zone, a soaking zone, and an extraction zone, and a leveler installed after this continuous treatment furnace is used to straighten the steel plate strain. In the straightening plate heating method in a continuous heat treatment furnace among the straightening methods, when heating the straightening plate, the temperature of each zone of the continuous heat treatment furnace is gradually increased from a low temperature to a high temperature from a heating zone to a soaking zone. A method for heating a straightening plate in a continuous heat treatment furnace, characterized in that the following settings are required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9093279A JPS5841329B2 (en) | 1979-07-19 | 1979-07-19 | Straightening plate heating method in continuous heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9093279A JPS5841329B2 (en) | 1979-07-19 | 1979-07-19 | Straightening plate heating method in continuous heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5616617A JPS5616617A (en) | 1981-02-17 |
| JPS5841329B2 true JPS5841329B2 (en) | 1983-09-12 |
Family
ID=14012212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9093279A Expired JPS5841329B2 (en) | 1979-07-19 | 1979-07-19 | Straightening plate heating method in continuous heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5841329B2 (en) |
-
1979
- 1979-07-19 JP JP9093279A patent/JPS5841329B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5616617A (en) | 1981-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6272429A (en) | Hot straightening method for thick steel plate | |
| JPS55104431A (en) | Production of cold rolled steel plate for deep drawing by short-time continuous annealing | |
| JPS5841329B2 (en) | Straightening plate heating method in continuous heat treatment furnace | |
| JPH052728B2 (en) | ||
| JPS5662928A (en) | Furnace temperature setting method of heating zone in a continuous annealing furnace | |
| JPS60262915A (en) | Method for preventing surface cracking of continuous cast billet | |
| JPS6151611B2 (en) | ||
| JPS6239208B2 (en) | ||
| JP2001164323A (en) | Cleaning method for thick steel plate | |
| SU981402A1 (en) | Method for heating large-size parts having axial soaking pit | |
| JPS55104430A (en) | Production of cold rolled steel plate for good workability by short-time continuous annealing | |
| JPS60413B2 (en) | Heating temperature control method in continuous heating furnace | |
| SU1206325A1 (en) | Method of heating steel ingots | |
| JP2879898B2 (en) | Manufacturing method of high hardness flat thin and medium steel plate | |
| JPS6327412B2 (en) | ||
| CN106893848A (en) | 20CrMo material V-type rail carburizing and quenching aligning methods | |
| JPS6335690B2 (en) | ||
| JPS6324052B2 (en) | ||
| JPS5677324A (en) | Cooling method and its apparatus in heat treatment of tool steel | |
| JPS57177834A (en) | Hot forming method for steel plate | |
| JPS5672124A (en) | Manufacture of case hardening steel | |
| JP2783299B2 (en) | Temperature control method for continuous annealing furnace | |
| SU764814A1 (en) | Method of manufacturing shaft forgings | |
| JPH11124624A (en) | Manufacture of thick austenitic stainless steel plate | |
| RU2055918C1 (en) | Method of preparing ingots for blooming |