JPS63171216A - Manufacture of shape steel - Google Patents
Manufacture of shape steelInfo
- Publication number
- JPS63171216A JPS63171216A JP245287A JP245287A JPS63171216A JP S63171216 A JPS63171216 A JP S63171216A JP 245287 A JP245287 A JP 245287A JP 245287 A JP245287 A JP 245287A JP S63171216 A JPS63171216 A JP S63171216A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- rolling
- steel
- section
- shape steel
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000001816 cooling Methods 0.000 claims abstract description 74
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 18
- 238000009826 distribution Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000005452 bending Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- B21B45/02—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 for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
-
- 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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は圧延形鋼の冷却制御により仕上げ圧延終了後、
冷却床を経ることなく直接に矯正を可能とする形鋼の製
造方法に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention provides cooling control for rolled sections after finish rolling.
The present invention relates to a method for manufacturing section steel that allows direct straightening without going through a cooling bed.
（従来の技術）
熱間圧延により例えばＨ形鋼、鋼矢板等の形鋼ｆ：裂造
する一般的な手段は第７図に示すように加熱され次鋼片
１をブレークダウンミル２、ユニバーサルミル３ａとエ
ツジヤ−３ｂからなル第１中ｒｄｌユニバーサルミル３
．ユニバーサルミル３１＆とエツジヤ−３１ｂからなる
第２中間ユニバーサルミル３１および仕上げユニバーサ
ルミル４からなる圧延装置列で行われる。(Prior art) A general means of breaking steel sections such as H-beams and steel sheet piles by hot rolling is as shown in FIG. Mill 3a and edger 3b 1st middle rdl universal mill 3
．． The rolling process is carried out in a rolling equipment row consisting of a second intermediate universal mill 31 consisting of a universal mill 31& and an edger 31b, and a finishing universal mill 4.
仕上げユニバーサルミル４で仕上げ圧延され穴形鋼は一
旦、冷却床５で矯正可能な常温まで冷却された後、ロー
ラー矯正機６ａまたはプレス矯正機６ｂで矯正される。The hole shaped steel that has been finish-rolled by the finishing universal mill 4 is once cooled down to room temperature where it can be straightened by a cooling bed 5, and then straightened by a roller straightening machine 6a or a press straightening machine 6b.
ところで、前記冷却床５は形鋼の温度が矯正可能な温度
まで低下するまで貯留する機能とともに、圧延と矯正機
の間の工程能力の差を吸収する。いわゆるバッフ丁−の
役割を有しているため、極めて広い面積の設備を必要と
する。ま九冷却床の操業には運転、保守管理の次めの作
業者が必要であり、複数の冷却床を持つ工場では形鋼製
品の工程管理が複雑になる等の問題があっ次。しかしな
がら従来の常識では圧延形鋼の製造工場では冷却床は必
須の設備と考えられ、冷却床を有しない形鋼圧延工場の
例は無い。強制約に低温まで冷却すれば簡易な冷却床で
対応できることは推察できるが、従来の認識では高温か
ら冷却すると材質と形状の問題が懸念されたため実用化
され次ことはなかった。ま九、残留応力の＠減の次め仕
上げ圧延終了後のＨ形鋼についてウェブ中央部とフラン
ジ外面中央部との温度差が所定の温度範囲になるよう冷
却する手段が特公昭５１−５６０７号公報に示されてい
る。By the way, the cooling bed 5 has the function of storing the shaped steel until its temperature drops to a temperature that allows straightening, and also absorbs the difference in process capacity between the rolling machine and the straightening machine. Since it plays the role of a so-called buff, it requires equipment with an extremely large area. The operation of the Maku cooling bed requires a second set of operators for operation and maintenance, and in factories with multiple cooling beds, there are many problems such as complicated process management of shaped steel products. However, according to conventional wisdom, a cooling bed is considered to be an essential facility in a mill for manufacturing rolled sections, and there is no example of a section rolling mill that does not have a cooling bed. It can be inferred that a simple cooling bed could be used to cope with the forced cooling to a low temperature, but the conventional understanding was that cooling from a high temperature caused problems with the material and shape, so it was never put into practical use. 9. After reduction of residual stress, Japanese Patent Publication No. 51-5607 discloses a means for cooling the H-section steel after finish rolling so that the temperature difference between the center of the web and the center of the outer surface of the flange falls within a predetermined temperature range. It is shown in the official gazette.
しかしながらこの技術は、引っ張シ強度・伸び等の材質
あるいは形状の矯正までは言及されておらず１本発明の
、目的とは相違する。さらに、圧延後の水冷に関する材
質の制御という目的では、厚板について多くの周知技術
がある。特開昭５５−１１１０４号公報あるいは特開昭
５５−１１３８４号公報がその例であるが、厚板と形鋼
では断面形状での基本的な相違によシ、厚板での制御技
術をそのまま形鋼に適用できない。すなわち１例えばＨ
形鋼の場合、７ランジとウェブとで板厚が異なるため圧
延途中での温度降下の程度は部位毎に異なシ、同一断面
は同時に圧延されるため板厚が厚いフランジ部は高温域
での圧延、板厚の薄いウェブでは低温域圧延となる。こ
の点で、断面内での温度分布が連続している厚板の圧延
後の冷却とは大きな差異がある。However, this technique does not mention correction of the material or shape such as tensile strength and elongation, which is different from the purpose of the present invention. Further, for the purpose of controlling the material quality regarding water cooling after rolling, there are many well-known techniques for thick plates. An example is JP-A-55-11104 or JP-A-55-11384, but due to the basic difference in cross-sectional shape between thick plates and shaped steel, the control technology for thick plates can be applied as is. Not applicable to shaped steel. i.e. 1 for example H
In the case of section steel, the plate thickness is different between the 7 flange and the web, so the degree of temperature drop during rolling is different for each part.Since the same cross section is rolled at the same time, the flange part where the plate thickness is thicker will be lower in the high temperature range. For thin webs, rolling is performed in a low temperature range. In this respect, there is a big difference from cooling after rolling of a thick plate, in which the temperature distribution within the cross section is continuous.
以上のように形鋼の冷却に関しては、各部位で異なる圧
延履歴、冷却開始条件全前提にとし且つ、全断面につい
て非水冷材と同等の材質全確保しなければならない問題
点があって、圧延後の冷却によって直接矯正するという
手段は従来、当業界で実用化された例は無かった・（本
発明が解決しようとする問題点）
本発明は熱間仕上げ圧延終了後の形鋼を冷却制御するこ
とによって、仕上げ圧延終了後に冷却床七経プして直接
に矯正を行い、材質および形状上の問題を生ずることな
く長尺製品の製造を可能とする形鋼の製造方法である。As mentioned above, regarding cooling of section steel, there are problems in that it is necessary to assume different rolling histories and cooling start conditions for each part, and to ensure that all cross sections have the same material quality as non-water-cooled materials. Until now, there has been no example of practical use in this industry of direct straightening by subsequent cooling. (Problem to be solved by the present invention) The present invention is a method of controlling the cooling of a section steel after finishing hot finish rolling. By doing so, this is a method of manufacturing a section steel that straightens the steel directly by rolling it through a cooling bed after finish rolling, thereby making it possible to manufacture long products without causing problems in terms of material quality or shape.
（問題点を解決する危めの手段およびその作用）本発明
は上述の如き問題点を有利に解決したものであシ、その
要旨は熱間仕上げ圧延終了直後の形鋼に対し、該形鋼の
成分と、長さ方向に直交する断面内における部位毎の板
厚および圧延条件によって冷却速度を決定し、＃部位毎
の冷却速度によつて全断面の平均温度が１５０℃以下に
なるまで冷却し次後、冷却床を経ることなく直接に矯正
を行うことを特徴とする形鋼の製造方法である。(Dangerous Means for Solving the Problems and Their Effects) The present invention advantageously solves the above-mentioned problems. The cooling rate is determined by the component, the plate thickness and rolling conditions for each part in the cross section perpendicular to the length direction, and the cooling rate for each part is determined until the average temperature of the entire cross section becomes 150℃ or less. This method of manufacturing a section steel is characterized in that straightening is performed directly after straightening without passing through a cooling bed.
以下本発明の詳細な説明する。The present invention will be explained in detail below.
第５図は一般に製造されている圧延Ｈ形鋼７の断面を示
す。同図において、７ランジ７ａの厚みｔＦはウェブ７
ｂの厚みｔＷよシも厚く形放されておシ、仕上げ圧延後
の断面の温度分布はフランジ７ａの温度がクエプ７ｂよ
り高−６また圧延温度、圧下率、圧延中の冷却条件等の
圧延履歴によっても断面円各部の性状は異な夕、このよ
うなＨ形鋼に対して一律に強制冷却を行うことはできな
い。本発明者等はどのような冷却を行えば、材質と形状
悪化を生ずることなく圧延後に直接矯正できるかを検討
した。FIG. 5 shows a cross section of a commonly manufactured rolled H-beam 7. In the figure, the thickness tF of the 7 langes 7a is the thickness of the web 7.
The thickness of b is also thicker than tW, and the temperature distribution of the cross section after finish rolling shows that the temperature of flange 7a is higher than that of flange 7b. Since the properties of each part of the cross-sectional circle vary depending on the history, forced cooling cannot be uniformly applied to such H-beam steel. The present inventors investigated what kind of cooling should be performed to directly straighten the material after rolling without causing deterioration of the material and shape.
まず材質と冷却条件の関係について述べる。First, we will discuss the relationship between material and cooling conditions.
＃ １ 序刀 しか ＬＬ Ｌ ＋−ド ロ： ′Ｌ
電 鷺龜 Ｃハ − ｔ〜 壱ｋ ’ｔｂ
ｌｒ ヤ １１度降下を経九後、冷却金開始し次場合
について各圧延仕上げ温度での平均冷却速度と材質の代
表指標である引っ張シ強度（ＴＳ）と伸び（Ｅｔ）の関
係を示したもので、第１図（イ）、（ロ）、（ハ）は板
厚が３４露、１８１ｍ、１２ｍの場合について示してい
る。＃１ Opening sword only LL L +-Dro: 'L
Den Sagidama Cha - t~ Ik 'tb
lr Y After 11 degrees of cooling, cooling begins and the relationship between the average cooling rate at each finishing rolling temperature and the tensile strength (TS) and elongation (Et), which are representative indicators of material quality, is shown for the following cases. FIG. 1 (a), (b), and (c) show cases in which the plate thicknesses are 34 mm, 181 m, and 12 m.
平均冷却速度は水冷開始から３００℃までの平均冷却速
度をさらに板厚方向に平均したものであシ、１５０℃ま
で冷却し次。本発明において冷却終了温度ｔ′１５０℃
以下までとした理由は、経験的に被矯正材の温度と矯正
効果の関係から知見きれたもので、およそ１５０℃を境
としてこれよフ高いと、常温まで冷却される間に断面各
部の温度推移の不均一から矯正後に再曲がりが発生する
ことがある交めである。第２図はその実験例であり、矯
正開始温度と矯正後の常温状態での曲がシの関係を示し
、矯正開始温度が１５０℃以下の場合には殆ど曲が夕は
生じていない。ｔた。圧延仕上げ温度と水冷開始温度と
の関係は実際の装置別に応じて決定すべきであるが、第
１図は一般的な形鋼圧延工場での例として、圧延仕上げ
温度よシ５０℃低い温度からの水冷開始について示して
いる。なお、対象とした形鋼の成分はＣ； ０．１２．
Ｓｉ ： ０．２０゜Ｍｎ ； １．０８． Ｐ ：
０．０２］ 、 Ｓ：０．０８．残部鉄及び不可避不
純物、各ｉｔ％の範囲に含まれる一般構造用圧延鋼材で
ある。The average cooling rate is the average cooling rate from the start of water cooling to 300°C, further averaged in the plate thickness direction, after cooling to 150°C. In the present invention, the cooling end temperature t'150°C
The reason for the following is that we have learned empirically from the relationship between the temperature of the material to be straightened and the straightening effect. This is an intersection where re-curving may occur after correction due to uneven transition. FIG. 2 is an experimental example of this, showing the relationship between the straightening start temperature and the degree of curvature at room temperature after straightening, and when the straightening start temperature is 150° C. or lower, almost no curvature occurs. It was. The relationship between the finishing rolling temperature and the water cooling start temperature should be determined depending on the actual equipment, but Figure 1 shows an example of a general section steel rolling mill, starting from a temperature 50°C lower than the finishing rolling temperature. The figure shows the start of water cooling. The composition of the target steel section is C; 0.12.
Si: 0.20°Mn; 1.08. P:
0.02], S: 0.08. This is a general structural rolled steel material containing the balance iron and unavoidable impurities within the range of each it%.
次ぎに、第１図の結果に基づきＨ形鋼の冷却後のＴＳが
全断面で均一となり、かつＥｌも満足する冷却条件の設
定方法について述べる。例えば、７ランジ部厚が３４Ｂ
、クエツ厚が１：）＋ｍＯＨ形鋼について圧延仕上げ温
度が７ランジ部で８５０℃、クエツ部で７５０℃とする
と、７ランジについては第１図（イ）よル、約り℃／秒
の平均冷却速度でＥｌ ｌ ２１％以上満号し次うえで
５５−一のＴＳが得られることが分かる。同様にクエプ
については第１図（−）に基づき、約り０℃／秒の平均
冷却速度で５５に９／−のＴＳが得られる。つま）以上
の手順で形鋼管部位毎に冷却制御すればＥｔを満足し、
且つ全断面均一なＴＳを有する形鋼を得ることが可能で
ある。即ち。Next, based on the results shown in FIG. 1, a method of setting cooling conditions such that the TS after cooling of the H-section steel is uniform over the entire cross section and El is satisfied will be described. For example, the thickness of the 7-lunge part is 34B.
, for a Kuetsu thickness of 1:)+mOH section steel, the rolling finishing temperature is 850°C at the 7th flange and 750°C at the Kuetsu part. For the 7th lange, see Figure 1 (A), the average of approximately 0°C/sec It can be seen that a TS of 55-1 can be obtained at a cooling rate of 21% or more. Similarly, for Kuep, based on FIG. 1 (-), a TS of 55 to 9/- is obtained at an average cooling rate of approximately 0° C./sec. Finally, if cooling is controlled for each section of the steel pipe using the above steps, Et will be satisfied,
Moreover, it is possible to obtain a section steel having a uniform TS throughout the entire cross section. That is.
鋼材成分、形鋼板厚、圧延仕上げ温度および冷却開始温
度等の条件から予め第１図の関係グラフを作成しておけ
ば、材質上での問題がない冷却速度を簡単に設定するこ
とができる。なお、前記成分以外ま几は他の合金成分を
添加し九場合は、成分条件別の関係グラフを使用すれば
良いことは勿論である。If the relationship graph shown in FIG. 1 is created in advance from conditions such as the steel material composition, the thickness of the steel section, the rolling finish temperature, and the cooling start temperature, it is possible to easily set the cooling rate that does not cause problems with the material. In addition, if other alloy components other than the above-mentioned components are added, it goes without saying that a relationship graph for each component condition may be used.
続いて、水冷による形状変形を可能なＶａり少なくする
次め１本発明では以下のような冷却を行った。第３図は
形鋼の７ランジを想定して冷却水量密度を片面３００
ｌｖｍｌ ｎ 、他方の面ｔｏ、３００．２００および
３００２７ｍ”ｍｌｎとして水冷した場合に発生する変
形量（３５０ｗｍ当念シの曲がシ量）ｔ−有限要素法に
よって計算したものである。板厚の薄い９躇の場合は片
面からのみの冷却では大きな変形が発生するので、曲が
シ量を無くす九めには２００１７ｍ ” ｍ ｉ ｍ以
上の下面水量密度が必要であることを示している。Next, in the present invention, the following cooling was performed to reduce possible shape deformation due to water cooling. Figure 3 assumes a 7-lunge steel section and the cooling water density is 300 on one side.
lvmln, the other surface to, 300.200 and 30027m"mln, and the amount of deformation that occurs when water cooling (the amount of bending of 350wm) is calculated by the finite element method. In the case of a thin 90 mm, large deformation will occur if cooling is performed only from one side, so this shows that a lower surface water density of 20017 mm'' or more is required to eliminate the amount of bending.
また、第４・図（イ）、（ｃＩ）はＨ形鋼の冷却部位の
冷却量とキャンパーの関係を示す、第４図（ｆ）の縦軸
は第６図に示す冷却終了後のＨ形鋼７ｔ−水平な載置面
Ｇに置い友時に長さ方向端部７１が載置面Ｇに対し上反
りした量Ｓ（キャンパー）を示し、横軸はキャンパーが
無い部分から端部７１までの長さを示す。第４図（ロ）
は第４図（ｆ）と左右に対応して横軸にＨ形鋼７の７ラ
ンジ冷却速度差を表し次ものである。冷却速度差（ΔＣ
Ｒ）は第４図（・・）に示すＨ形鋼７の片側７ランジに
ついて７ランジ幅の１／４部位における点Ａと点Ｂの冷
却速度差である。これらの図面から明らかなように、冷
却速度差が小さい程キャンパーの発生は少ない。従って
冷却にあたっては以上の形状変形を考慮すると共に前記
の材質制御を組み合わせて実操業での水冷条件を設定す
る。In addition, Figure 4 (a) and (cI) show the relationship between the cooling amount of the cooling part of the H-section steel and the camper, and the vertical axis in Figure 4 (f) is the H Shaped steel 7t - When placed on a horizontal mounting surface G, the longitudinal end 71 shows the amount S (camper) that curves upward with respect to the mounting surface G, and the horizontal axis is from the part where there is no camper to the end 71 Indicates the length. Figure 4 (b)
The horizontal axis corresponds to the left and right sides of FIG. 4(f), and the difference in the cooling rate of the H-shaped steel 7 in seven langes is shown as follows. Cooling rate difference (ΔC
R) is the difference in cooling rate between point A and point B at 1/4 of the width of the seven flange on one side of the H-shaped steel 7 shown in FIG. 4 (...). As is clear from these drawings, the smaller the cooling rate difference, the less camper occurs. Therefore, when cooling, the water cooling conditions for actual operation are set by taking into consideration the above shape deformation and combining the material control described above.
（発明の効果）
前記した構故に基づき圧延後の冷却を経た後、直接に矯
正機を通しても常温時での曲がシは生ぜず、また材質的
な問題も無く良好な製品を得ることができ友。マ次１本
発明によると冷却床が不要となるので、省工程、省エネ
および作業者の削減となり、工業上の効果は極めて大き
い。(Effects of the invention) Based on the above-described structure, even if the product is cooled after rolling and then passed directly through a straightening machine, no bending occurs at room temperature, and a good product can be obtained without any material problems. friend. Main 1: According to the present invention, a cooling bed is not required, resulting in process savings, energy savings, and a reduction in the number of workers, resulting in extremely large industrial effects.
第１図（イ）、（ロ）、（ハ）は本発明の詳細な説明す
る仕上げ温度・水冷開始温度に対する冷却速度の関係を
示すグラフ、第２図は矯正温度と曲がフ量の関係を示す
グラフ、第３図は水量密度と曲が夕の関係を示すグラフ
、第４図（イ）は形鋼の端部位置とキャンパーの関係を
示すグラフ、第４図（ロ）は冷却部位の温度差に対する
キャンパーの関係を示すグラフ、第４図（ハ）は冷却部
位の水冷条件を示す説明図、第５図はＨ形鋼の断面を示
す説明図、第６図はキャンパーを説明する略図、第７図
は従来の形鋼圧延装置列を示す略図である。
１・・・鋼片 ２・・・プレークダクンミ
ル３・・・第１中間ユニバーサルミル
３１・・・ｇ２中間ユニバーサルミル
４・・・仕上ケユニバーサルミル
５・・・冷却床 ６ａ・・・ローラー矯正機６
ｂ・・・プレス矯正機 ７・・・Ｈ形鋼骨−−Figures 1 (a), (b), and (c) are graphs showing the relationship between the cooling rate and the finishing temperature and water cooling start temperature, which are explained in detail in the present invention, and Figure 2 is the relationship between the straightening temperature and the amount of bending. Figure 3 is a graph showing the relationship between the water density and the time of the song. Figure 4 (a) is a graph showing the relationship between the end position of the section steel and the camper. Figure 4 (b) is the graph showing the cooling area. Graph showing the relationship of the camper to the temperature difference of FIG. 7 is a schematic diagram showing a conventional section steel rolling mill train. 1... Steel billet 2... Plaque Dakun Mill 3... First intermediate universal mill 31... g2 Intermediate universal mill 4... Finishing universal mill 5... Cooling bed 6a... Roller Straightening machine 6
b...Press straightening machine 7...H-shaped steel frame--
Claims (1)
、長さ方向に直交する断面内における部位毎の板厚およ
び圧延条件によって冷却速度を決定し、該部位毎の冷却
速度によって全断面の平均温度が１５０℃以下になるま
で冷却した後、冷却床を経ることなく直接に矯正を行う
ことを特徴とする形鋼の製造方法。For a section steel immediately after finishing hot finish rolling, the cooling rate is determined based on the composition of the section steel, the plate thickness and rolling conditions for each section in a cross section perpendicular to the length direction, and the cooling rate for each section is determined. A method for manufacturing a section steel, characterized in that after cooling the steel section until the average temperature of the entire cross section becomes 150° C. or less, straightening is performed directly without passing through a cooling bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP245287A JPH0692009B2 (en) | 1987-01-08 | 1987-01-08 | Shaped steel manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP245287A JPH0692009B2 (en) | 1987-01-08 | 1987-01-08 | Shaped steel manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63171216A true JPS63171216A (en) | 1988-07-15 |
| JPH0692009B2 JPH0692009B2 (en) | 1994-11-16 |
Family
ID=11529675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP245287A Expired - Lifetime JPH0692009B2 (en) | 1987-01-08 | 1987-01-08 | Shaped steel manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0692009B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061871A (en) * | 2005-08-31 | 2007-03-15 | Sumitomo Metal Ind Ltd | Method for manufacturing steel plate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605243B (en) * | 2012-03-15 | 2013-12-25 | 莱芜钢铁集团有限公司 | Wind power H-beams and production method thereof |
-
1987
- 1987-01-08 JP JP245287A patent/JPH0692009B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061871A (en) * | 2005-08-31 | 2007-03-15 | Sumitomo Metal Ind Ltd | Method for manufacturing steel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0692009B2 (en) | 1994-11-16 |
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