JPH03285701A - Rolling method of thick steel plate - Google Patents
Rolling method of thick steel plateInfo
- Publication number
- JPH03285701A JPH03285701A JP8093290A JP8093290A JPH03285701A JP H03285701 A JPH03285701 A JP H03285701A JP 8093290 A JP8093290 A JP 8093290A JP 8093290 A JP8093290 A JP 8093290A JP H03285701 A JPH03285701 A JP H03285701A
- Authority
- JP
- Japan
- Prior art keywords
- thick steel
- slab
- rolling
- width
- rolled
- 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
- 238000005096 rolling process Methods 0.000 title claims abstract description 48
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims description 22
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 238000005520 cutting process Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- -1 oxygen dienes Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業」二の利用分野〉
本発明は、一つのスラブから複数の異幅・異厚の厚鋼板
を製造する厚板圧延方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industry> Second Field of Application The present invention relates to a thick plate rolling method for producing a plurality of thick steel plates of different widths and thicknesses from one slab.
〈従来の技術〉
一般に厚鋼板は用途の多様性により、小ロント・多品種
の注文生産が前提であるため、圧延機の能ノＪや歩留り
などを考慮して通常同一スラブ内に幅、厚さの異なる数
種の厚鋼板を組み込んで圧延に供している。<Conventional technology> Generally, thick steel plates are manufactured to order in small rolls and in a wide variety of products due to the diversity of their uses. Several types of thick steel plates with different thicknesses are incorporated and subjected to rolling.
第３図は、ごのような幅、厚さの異なる厚鋼板を取合わ
せて極力大きな一つのスラブとなして、熱間圧延する方
法の一例を示したものである。ずなわら、幅、厚さの異
なる厚鋼板Ｐ１およびＰ２を取合わせて製造する場合に
必要なスラブＡ、および△２を一つの大きなスラブ（以
下、長尺スラブという）八となし、この長尺スラブΔを
加熱後、その長手方向の中間部を幅方向に例えばガス切
断して短尺スラブΔ７．Δ２に分割したのち、それぞれ
の短尺スラブＡ１．△２を順次熱間圧延して所定の（１
法の圧延４．４ａｌおよびａ、となし、これら圧延材ａ
ｔ）２２をそれぞれ次工程の切断工程で所定の寸法に切
断して厚鋼板Ｐ、およびＰ２を製造する方法である。FIG. 3 shows an example of a method in which thick steel plates of different widths and thicknesses are assembled into one slab as large as possible and hot rolled. Slab A and △2, which are required when manufacturing thick steel plates P1 and P2 with different widths and thicknesses, are considered as one large slab (hereinafter referred to as long slab) 8, and this length is After heating the long slab Δ, the intermediate portion in the longitudinal direction is cut in the width direction by gas, for example, to obtain a short slab Δ7. After dividing into Δ2, each short slab A1. △2 is sequentially hot-rolled to a predetermined (1
method rolling 4.4al and a, and these rolled materials a
t) 22 is cut into predetermined dimensions in the next cutting process to produce thick steel plates P and P2.
あるいはまた、第４図に示すように、加熱後の長尺スラ
ブ八を熱間圧延するに際し、圧延途中でロール開度をス
ラブ中間部より変更して異幅・異厚の圧延＋Ａａ３を形
成し、この圧延＋Ａａ３よりそれぞれ寸法の異なる厚鋼
板Ｐ、およびＰ２を製造する方法がある。Alternatively, as shown in Fig. 4, when hot-rolling the heated long slab 8, the roll opening degree is changed from the middle part of the slab during rolling to form rolled +Aa3 with different widths and different thicknesses. There is a method of manufacturing thick steel plates P and P2 having different dimensions from this rolling +Aa3.
〈発明が解決しようとする課題〉
しかしながら、上記した前者の方法では加熱後の長尺ス
ラブをガス切断した後それぞれの分割後のスラブを長さ
方向圧延と幅出し圧延を行う必要があり、圧延能率が低
下して好ましくない。さらにガス切断に長時間を要する
ために、分割後のスラブは先行スラブの圧延中に後続ス
ラブを圧延機後方で待機さ・ｌねばならず、この間後続
スラブは大気中で放冷されることになり、スラブ温度が
低下するなどの問題点がある。<Problems to be Solved by the Invention> However, in the former method described above, it is necessary to gas-cut the long slab after heating and then perform longitudinal rolling and tenter rolling on each divided slab. This is undesirable as it reduces efficiency. Furthermore, since gas cutting takes a long time, the slab after division must wait behind the rolling mill while the preceding slab is being rolled, and during this time the succeeding slab is left to cool in the atmosphere. However, there are problems such as a drop in slab temperature.
一方、後者の方法は、圧延途中でロール開度を変更して
異幅・異厚の圧延材とするために、ゴ法変更部（第４図
のＬ）に相当する長さのオフゲージ部が生して歩留りが
悪化する。また圧延途中の変更可能なロール開度もたか
だか３〜４ｍｍ位であり、したがって取合わ−Ｕができ
る厚鋼板の寸法差にも制約が生じるなど歩留り低下の要
因にもなる欠点がある。On the other hand, in the latter method, in order to change the roll opening degree during rolling to obtain rolled materials with different widths and thicknesses, an off-gauge part with a length corresponding to the rolling method change part (L in Fig. 4) is created. This will cause the yield to deteriorate. In addition, the roll opening degree that can be changed during rolling is only about 3 to 4 mm at most, and therefore there are drawbacks such as restrictions on the dimensional difference in the thick steel plates that can be assembled -U, which may cause a decrease in yield.
このような従来の問題を改善する手段の一つとして、例
えば特開昭６０−６８１０２号公報に開示されているよ
うな圧延方法がある。すなわち、第５図に示すように、
加熱炉１と圧延機４の間に保温カバー２と切断機３を設
けて、寸法の異なる複数の厚鋼板を一つのスラブに取合
わせて大きな長尺スラブ八とし、この長尺スラブ八を加
熱後、−旦中間厚まで相圧延して中間材Ａ′となし、次
いでこの中間相Δ′を切断機３により所定の複数枚の分
割中間材Ａｔ ’ 、 Ａ２ ’に分割し、トップの分
割中間材Ａ２′より圧延を行って厚鋼板ａ２とし、１−
ンブ分割中間材Ａｔ’の圧延中に他の分割中間材へ〇′
は保温カバー２内で保温しながら、先行の分割中間材Δ
２′の圧延宛丁後順次各所定寸法の厚鋼板ａ１に仕」二
圧延する方法である。As one means for improving such conventional problems, there is a rolling method as disclosed in, for example, Japanese Unexamined Patent Publication No. 60-68102. That is, as shown in Figure 5,
A heat insulating cover 2 and a cutting machine 3 are provided between the heating furnace 1 and the rolling mill 4, and a plurality of thick steel plates of different sizes are combined into one slab to form a large long slab 8, and this long slab 8 is heated. After that, the intermediate material A' is phase-rolled to an intermediate thickness, and then this intermediate phase Δ' is divided into a predetermined plurality of divided intermediate materials At' and A2' by a cutting machine 3, and the top divided intermediate material is Rolling is performed from material A2' to obtain thick steel plate a2, and 1-
〇' to other divided intermediate materials during rolling of split intermediate material At'
While keeping warm inside the heat insulation cover 2, the previous split intermediate material Δ
This is a method in which after the rolling process of step 2', the steel sheets a1 of each predetermined size are sequentially cut and rolled twice.
〕の方法によれば、確かに上記のような従来の問題点は
解決されているが、しかし次のような問題がある。] method, the above-mentioned conventional problems are certainly solved, but there are the following problems.
■ 長尺スラブを中間材に圧延するに際し、中間材の寸
法の決定について、板厚は薄いほどよいがしかしあまり
薄くすると熱放散面積が増加して４Ａ判澗度が低下し易
くなるから考慮する必要があり、また取合わセた厚鋼板
の最大板厚よりも薄クシｔ【いこと、さらに切断機、保
温カバーテーブルローラなどの設備能力などの種々の条
件を合ねゼで考慮して決定する必要があり、その制約が
大きいこと。■ When rolling a long slab into an intermediate material, when determining the dimensions of the intermediate material, the thinner the plate thickness, the better, but if it is too thin, the heat dissipation area will increase and the 4A resolution will tend to decrease, so consider this. It is determined by taking into consideration various conditions such as the need for a comb that is thinner than the maximum thickness of the thick steel plate being assembled, and the capacity of equipment such as the cutting machine, heat-insulating cover table roller, etc. It is necessary to do so, and there are significant restrictions.
■ 分割後の圧延において分割が適当でない々、幅出し
圧延と延伸圧延を必ず必要とするため圧延能率が悪く、
また歩留りも低下するおそれがあること。■ When rolling after splitting, the splitting is not appropriate, and rolling efficiency is poor because tenter rolling and elongation rolling are always required.
There is also a risk that the yield will decrease.
このように従来技術においては、圧延能率の向−１−を
目的としてスラブ単重の拡大を指向しようとすれば、幅
、Ｗさの差異に起因した歩留りの低下が避＋）られない
のである。In this way, in the conventional technology, if an attempt is made to increase the unit weight of the slab with the aim of improving rolling efficiency, a decrease in yield due to differences in width and W height is unavoidable. .
本発明は、上記のような課題を解決ずべ（してなされた
厚鋼板の圧延方法を提供することを目的とする。An object of the present invention is to provide a method for rolling a thick steel plate that solves the above-mentioned problems.
〈課題を解決するための手段〉
本発明は、寸法の異なる複数の厚鋼板を一つのスラブに
取合わせた大きな長尺スラブを加熱後、−旦中間祠に圧
延し、分割したのち所定の寸法の厚鋼板にそれぞれ圧延
するｊ７鋼板の圧延方法において、前記中間材の幅は先
行して圧延される厚鋼板の幅寸法に対応して必要とされ
るスラブの幅寸法と同一なτＪ法とされ、その長さは前
記先行して圧延される厚鋼板の長さ寸法に対応して必要
とされるスラブの長さ寸法と同一とされる１法と、少な
くとも後続して圧延されるｊ１鋼板の幅寸法に対応して
必要とされるスラブの幅寸法と同一・とされる寸法との
絹み合わせとされることを特徴とする厚板圧延方法であ
る。<Means for Solving the Problems> The present invention involves heating a large long slab in which a plurality of thick steel plates of different dimensions are combined into one slab, rolling it into a rolling mill, dividing it, and then dividing it into predetermined dimensions. In the J7 steel plate rolling method, the width of the intermediate material is the same as the width of the slab required in accordance with the width of the thick steel plate to be rolled in advance. , the length is the same as the length of the required slab corresponding to the length of the previously rolled thick steel plate, and at least the J1 steel plate that is subsequently rolled. This method of rolling a thick plate is characterized in that the width of the slab is matched with the required width of the slab.
〈作 用〉
本発明４ｊよれば、複数のＷ−鋼板のそれぞれに必要と
されるスラブ寸法のみから中間刊寸法を決め、か゛つ分
割後の後行で圧延する分割中間材の寸法を熱用失の少な
い寸法に設計し、さらに分割後の圧延におレノる転回数
を最小にするようにしたので、幅出し圧延をなくするこ
とが可能である。<Function> According to the present invention 4j, the intermediate dimensions are determined only from the slab dimensions required for each of the plurality of W-steel plates, and the dimensions of the divided intermediate material to be rolled in the succeeding row after the division are determined by heat treatment. Since it is designed to have dimensions with little loss and the number of turns required for rolling after division is minimized, it is possible to eliminate tenter rolling.
以下に、本発明法による中間材の長さの決定およびその
分割長さの決定の手順について、第１図を参照して具体
的に説明する。Below, the procedure for determining the length of the intermediate material and its division length by the method of the present invention will be specifically explained with reference to FIG.
■ いま、厚さ；シ、×幅；ｗ、Ｘ長さ：Ｎｌおよび厚
さ；ｔ２Ｘ幅；ｗ２×長さ；１２なる２枚の厚鋼板ａｔ
、ａｚを、寸法が厚さ；′ｒ×幅；Ｗ×長さ、Ｌなる１
枚の長尺スラブＡから圧延するものとすると、−１ユ記
の各寸法の関係はマスフロー一定則により下記（１）式
を満足する必要がある。■ Now, two thick steel plates with thickness; x width; w; x length: Nl and thickness; t2 x width; w2 x length; 12.
, az, the dimensions are thickness; 'r x width; W x length, L 1
Assuming that rolling is performed from a long slab A, the relationship between the dimensions in −1U must satisfy the following equation (1) according to the constant mass flow law.
ｔ Ｘｗ Ｘｌ２
′）” Ｘ Ｗ Ｘ Ｌ ＝
Ｉ
２
ここで、Ｙ、、Ｙ、は厚鋼板ａｌ＋ａ２の設定歩留り稙
であり、またＷ１≧Ｗまたはｗ２≧Ｗであるごとが必要
であり、以下においてＷ＋≧Ｗの場合について説明をす
るものとする。t Xw Xl2 ′)” X W The case where W+≧W will be explained.
■ ついで、長尺スラブ八に通常の圧延を施して寸法が
厚さ；Ｔ′Ｘ幅；Ｗ′×長さ；Ｌ′なる中間＋Ａ八′と
し、これを２分割してそれぞれの長さがり、’、Ｌ。′
になるような分割中間材Δ１′、Δ２′とする場合の各
寸法関係ば以下のように決定する。■Next, the long slab 8 is rolled in the usual manner to obtain a middle + A8' with dimensions of thickness; T'X width; W' x length; ',L. ′
In the case of split intermediate materials Δ1' and Δ2', the dimensional relationships are determined as follows.
Ｌ’ ＝ＬＩ ’ １１７ ’ −一−ｆ
２）Ｗ’ ＝ｗ、（α、 −−−−（
３）Ｌ □＝ ｗ ｚ ＋（Ｘ ２−−−−−−（４）
ごこで、α１．α２は、分割中間＋Ａ’ＡΔ２′での必
要幅代である。L'=LI'117'-1-f
2) W' = w, (α, -----(
3) L □= w z + (X 2−−−−−−(4)
Gokode, α1. α2 is the required width at the middle of the division +A'AΔ2'.
Ｙ２ ＸＷ’ Ｘｌ、、２
１２ ＸＷ２ ×ｐ、ｚ
Ｙ２ Ｘ （ｗ＋ 十αｌ）Ｘ （Ｗ２１−αｚ ）（
５）
したがって、前記（２）〜（５）式からＩ７１′は下記
（６）式で求めることができる。Y2 XW' Xl,, 2 12 XW2 ×p,z Y2
5) Therefore, from the above formulas (2) to (5), I71' can be determined by the following formula (6).
Ｔ’ ＸＷ’
■ この上・うにして用法を決定したら、ます長尺スラ
ブ八を中間材Ａ′に圧延し、その長さＬ’を分割して長
さＬ Ｉ ’ ＋ Ｌ２′なる分割中間材Δ、’、Ａ
２’を得る。T' Material Δ,',A
Get 2'.
■ そして、まずトップの分割中間材Ａ＋ ’を長手方
向に滅厚圧延のめをして所望の寸法を有する厚鋼板ａ１
を製造する。■ First, the top split intermediate material A+' is rolled in the longitudinal direction to create a thick steel plate a1 having the desired dimensions.
Manufacture.
■ ついで、残りの分割中間＋ＡＡ２’を９０°転回し
た後幅方向に減厚圧延のみをして所望の寸法を有する厚
鋼板ａ２を製造する。(2) Next, the remaining intermediate division +AA2' is rotated by 90 degrees and then only rolled to reduce its thickness in the width direction to produce a thick steel plate a2 having desired dimensions.
なお、中間材Δ′の切断時にラインのロスタイムが生じ
るのを防ぐために、例えば第２図に示すように切断機３
および保温カバー２をバイパスラインＧに取イ：１ける
ようにすれば、切断中においても次の長尺スラブを圧延
することができ、連続圧延を実施することが可能である
。ここで、中間材Ａ′の切断に用いる切断機３は、例え
ば酸素ジエン１〜による１・−チカツタなどの高速切断
可能な型式が望ましい。In addition, in order to prevent line loss time when cutting the intermediate material Δ', the cutting machine 3 is
If the heat insulating cover 2 is installed in the bypass line G, the next long slab can be rolled even during cutting, and continuous rolling can be performed. Here, the cutting machine 3 used for cutting the intermediate material A' is preferably of a type capable of high-speed cutting, such as a 1-chikatsuta using oxygen dienes 1 to 1.
また、トップの分割中ｔ７ｊ祠ＡＩ′の圧延中は後行の
分割中間４．ＩＡ２’を保温カバー２内で保温しておき
、先行の分割材Ａｌ′の圧延完了後順次所望の寸法に圧
延するようにすれば、温度降下を最小に抑制することが
できる。Also, during the rolling of the top part t7j AI', the following parting intermediate 4. If the IA 2' is kept warm in the heat insulating cover 2 and rolled to a desired size one after another after completion of rolling of the preceding divided material Al', the temperature drop can be suppressed to a minimum.
」二記の説明は２分割のケースについて述ベタモのであ
るが、３分割の場合についても同様な考えを基Ｇこして
行・うごとが可能である。The explanation in Section 2 is based on the two-part case, but it can also be applied to the three-part case based on the same idea.
ずなわら、取合わされる厚鋼板３枚のうち、例えば２枚
の幅が同一で残りの１枚が異なる場合は、まず同一の幅
の２枚の必要長さに３枚目の必要幅に対応した長さを加
算して中間材を圧延した後３分割するようにして、長手
方向に減厚圧延または９０’転回後幅方向に滅厚圧延す
るようにする。この場合、分割中間材の取り合わせｊ順
序はいかようでも４Ｍわない。Of the three thick steel plates to be assembled, for example, if two have the same width and the remaining one has a different width, first add the required length of the two of the same width to the required width of the third. After adding the corresponding lengths and rolling the intermediate material, it is divided into three parts, and the material is rolled to reduce the thickness in the longitudinal direction or to reduce the thickness in the width direction after turning 90'. In this case, no matter what the order of arrangement j of the divided intermediate materials is, it will not be 4M.
また、取合わされる厚＠板３枚の幅が全部族なる場合は
、その３枚のうち最も幅寸法の小さい厚鋼板の幅を中間
材の幅とし、その必要長さに残りの２枚の幅に対応する
長さを加算して中間材の長さとなるように圧延し、３分
割後は幅寸法の小さい分割中間材はそのまま長手方向に
滅厚圧延し、他の分割中間＋Ａは９０°転回した後幅方
向に減厚圧延するようにすればよい。In addition, if the width of the three thick steel plates to be assembled is the entire width, the width of the thick steel plate with the smallest width dimension among the three plates is taken as the width of the intermediate material, and the remaining two plates are added to the required length. Add the length corresponding to the width and roll it to the length of the intermediate material, and after dividing into three, the divided intermediate material with the smaller width dimension is rolled as it is in the longitudinal direction, and the other divided intermediate +A is 90° After turning, rolling may be performed to reduce the thickness in the width direction.
〈実施例〉
厚さ；３ＳｍｍＸ幅； ２５００ｍｍ Ｘ長さ； １８
５００ ｍｍおよび厚さ：２０ｍｍ×幅； ４０００
ｍｍ Ｘ長さ： ２００００ ｍｍなる２枚の厚鋼板ａ
ｌ、ａ？、を同時に製造する際に、本発明法を適用して
行った。<Example> Thickness: 3Smm x Width: 2500mm x Length: 18
500 mm and thickness: 20 mm x width; 4000
mm x length: 2 thick steel plates a of 20000 mm
l, a? The method of the present invention was applied to simultaneously produce .
長尺スラブＡとしては、従来の経験から設定歩留り値を
９５％とした場合、厚さ；３］、ＯｍｍＸ幅；２２４０
胴×長さ； ２４３Ｂｍｍと厚さ；３１０ｍｍｘ幅：
２２４０ｍｍ×長さ；２４４１ｍｍの寸法のスラブが必
要であったことから、厚さｉ３］ＯｍｍＸ幅； ２２４
０…ｍ×長さ； 、１８７９ｍｍの寸法のものを用いた
。As long slab A, if the set yield value is 95% based on conventional experience, thickness: 3], Omm x width: 2240
Torso x length: 243Bmm and thickness: 310mm x width:
Since a slab with dimensions of 2240 mm x length; 2441 mm was required, thickness i3] Omm x width; 224
A piece with dimensions of 0...m x length; , 1879 mm was used.
そして、前記（１）〜（６）式を用いて計算した結果、
中間４．１ Ａ ’の１法は厚さ１１６４．１＋＋＋ｍ
Ｘ幅； ２５５０ｍｍ×長さ；８０９５ｍｍであり、分
割中間材ＡＩ′およびΔ、′の長さり、’ 、Ｌ２’
はそれぞれ４０４５ｍｍ４０５０ｍｍであった。As a result of calculation using the above formulas (1) to (6),
1 method of intermediate 4.1 A' has a thickness of 1164.1 +++ m
X width: 2550 mm x length: 8095 mm, and the lengths of the split intermediate materials AI' and Δ,', ', L2'
were 4045 mm and 4050 mm, respectively.
そこで、長尺スラブΔから中間材Ａ′までの圧延にはパ
ス回数８パス、時間が８５秒を要し、分割後における厚
鋼板ａ、、ａｚまでの減厚圧延にはパス回数が６バスお
よび９バス、また圧延時間が５５秒および８０秒を要し
、合計のバス回数が２３パス圧延時間が１３５秒であっ
た。Therefore, it takes 8 passes and 85 seconds to roll from the long slab Δ to the intermediate material A', and it takes 6 passes to reduce the thickness of the thick steel plates a, , and az after dividing. and 9 passes, and the rolling times were 55 seconds and 80 seconds, and the total number of passes was 23 passes, and the rolling time was 135 seconds.
なお、従来法により２木のスラブを用いて厚鋼板ａｌ、
ａ２をそれぞれ製造した場合は、１木目の厚さ：３］Ｏ
ｍｍＸ幅； ２２４０胴×長さ；２４３８ｍｍのスラブ
から厚鋼板ａ１を圧延するにはバス回数で１３パス、圧
延時間で１３５秒を要し、２木目の厚さ３１０ｍｍｘ幅
； ２２４０ｍ＋ｎ Ｘ長さ；２４４１ｍｍのスラブか
ら厚鋼板ａ２を圧延するにはバス回数が１６バス、圧延
時間が１６０秒であり、したがって２木の厚鋼板ａ（、
ａｔを圧延するのに要した合旧のバス回数は２９パス、
圧延時間は２９５秒であった。In addition, thick steel plate Al,
If A2 is manufactured separately, the thickness of the first grain: 3]O
To roll thick steel plate A1 from a slab of mm x width; 2240 mm x length 2438 mm, it takes 13 passes and 135 seconds of rolling time, and the thickness of the second grain is 310 mm x width: 2240 m + n x length: 2441 mm. To roll thick steel plate a2 from a slab of , the number of buses is 16 and the rolling time is 160 seconds.
The number of passes required to roll AT was 29 passes.
The rolling time was 295 seconds.
これらの結果から明らかなように、本発明法は従来法に
比し約２５％もの能率向上が認められることがわかる。As is clear from these results, it can be seen that the method of the present invention has an efficiency improvement of about 25% compared to the conventional method.
〈発明の効果〉
以上説明したように、本発明によれば、何ら特別の規制
を設りることなく、１枚のスラブから複数の厚鋼板を歩
留りの低下を惹起することなく、かつ、高能率で製造す
ることができる。<Effects of the Invention> As explained above, according to the present invention, a plurality of thick steel plates can be produced from one slab without any reduction in yield and without any special regulations. It can be manufactured efficiently.
第１図は本発明方法の実施例の手順を示す図、第２図は
本発明方法を適用する圧延設備を示す平面図、第３図は
従来例を示す斜視図、第４図は他の従来例を示す斜視図
、第５図は従来の改作例を示す側面図である。
■・・・加熱炉、 ２・・・保温カバー、 ３・・
・切断機。
４・・・圧延機、訃・・テーブルローラ、 ６・・・
パイパスライン。
２Fig. 1 is a diagram showing the procedure of an embodiment of the method of the present invention, Fig. 2 is a plan view showing a rolling equipment to which the method of the present invention is applied, Fig. 3 is a perspective view showing a conventional example, and Fig. 4 is a diagram showing other rolling equipment. FIG. 5 is a perspective view showing a conventional example, and FIG. 5 is a side view showing a modified example of the conventional example. ■...Heating furnace, 2...Heating cover, 3...
·Cutting machine. 4...Rolling mill, butt...Table roller, 6...
bypass line. 2
Claims (1)
た大きな長尺スラブを加熱後、一旦中間材に圧延し、分
割したのち所定の寸法の厚鋼板にそれぞれ圧延する厚鋼
板の圧延方法において、前記中間材の幅は先行して圧延
される厚鋼板の幅寸法に対応して必要とされるスラブの
幅寸法と同一な寸法とされ、その長さは前記先行して圧
延される厚鋼板の長さ寸法に対応して必要とされるスラ
ブの長さ寸法と同一とされる寸法と、少なくとも後続し
て圧延される厚鋼板の幅寸法に対応して必要とされるス
ラブの幅寸法と同一とされる寸法との組み合わせとされ
ることを特徴とする厚板圧延方法。In a method of rolling thick steel plates, a large long slab made by combining multiple thick steel plates with different dimensions into one slab is heated, then rolled into an intermediate material, divided, and then rolled into thick steel plates of predetermined dimensions. The width of the intermediate material is the same as the width of the required slab corresponding to the width of the thick steel plate to be rolled previously, and its length is equal to the width of the thick steel plate to be rolled first. A dimension that is the same as the required length dimension of the slab corresponding to the length dimension, and at least the same as the required width dimension of the slab corresponding to the width dimension of the thick steel plate to be rolled subsequently. A thick plate rolling method characterized by a combination of dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8093290A JP2633372B2 (en) | 1990-03-30 | 1990-03-30 | Rolling method of thick steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8093290A JP2633372B2 (en) | 1990-03-30 | 1990-03-30 | Rolling method of thick steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03285701A true JPH03285701A (en) | 1991-12-16 |
| JP2633372B2 JP2633372B2 (en) | 1997-07-23 |
Family
ID=13732220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8093290A Expired - Fee Related JP2633372B2 (en) | 1990-03-30 | 1990-03-30 | Rolling method of thick steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2633372B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100406404B1 (en) * | 1999-07-14 | 2003-11-19 | 주식회사 포스코 | A method for manufacturing thick steel plates with difference thickness from one slab |
| CN110252805A (en) * | 2019-04-26 | 2019-09-20 | 太原科技大学 | A kind of manufacturing method of easy welding composite plate assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107790494B (en) * | 2016-08-31 | 2020-06-23 | 鞍钢股份有限公司 | Camel blank rolling method for producing steel plate with thickness of 6mm and limit specification by using medium plate |
-
1990
- 1990-03-30 JP JP8093290A patent/JP2633372B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100406404B1 (en) * | 1999-07-14 | 2003-11-19 | 주식회사 포스코 | A method for manufacturing thick steel plates with difference thickness from one slab |
| CN110252805A (en) * | 2019-04-26 | 2019-09-20 | 太原科技大学 | A kind of manufacturing method of easy welding composite plate assembly |
| CN110252805B (en) * | 2019-04-26 | 2020-11-17 | 太原科技大学 | Manufacturing method of easily-welded composite board assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2633372B2 (en) | 1997-07-23 |
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