JPS60213383A - Continuous joining method of high-temperature thick steel plates - Google Patents
Continuous joining method of high-temperature thick steel platesInfo
- Publication number
- JPS60213383A JPS60213383A JP6993784A JP6993784A JPS60213383A JP S60213383 A JPS60213383 A JP S60213383A JP 6993784 A JP6993784 A JP 6993784A JP 6993784 A JP6993784 A JP 6993784A JP S60213383 A JPS60213383 A JP S60213383A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- billets
- molten steel
- rolling
- billet
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/04—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a rolling mill
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、鋼材の接合方法に関し、さらに詳細には鋼材
の連続熱間圧延工程において先行鋼片と後行鋼片と【接
合する厚鋼材の接合方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining steel materials, and more particularly relates to a method for joining thick steel materials to be joined between a preceding steel billet and a following steel billet in a continuous hot rolling process of steel materials. .
従来、鋼材を熱間圧延する場合は、通常、所定長さの鋼
片を1本ずつ間欠的に圧延機に供給し、圧延を行ってい
る。この場合、鋼片の先端部と後端部においては形状不
良が生じて切り捨てるので製品歩留pが悪くなるば〃)
やでなく、鋼片端部がロールに噛み込み、あるいはロー
ルから排出されるたびに衝撃荷重が加わシ、ロール疵が
発生する機会が多くなり、ロール取替費用やロール取替
のための圧延停止の時間ロス等が問題となっていた。そ
こで、複数枚の鋼片をあらかじめ接続し、連続的に圧延
する工うにすれば、上記問題を生ずることがなく、生産
性?大幅に向上し得ることが考えられる。Conventionally, when hot rolling steel materials, steel slabs of a predetermined length are usually intermittently supplied one by one to a rolling mill for rolling. In this case, the tip and rear ends of the steel billet will have a defective shape and will be cut off, resulting in a poor product yield p.)
In addition, every time the end of the steel piece gets caught in the roll or is ejected from the roll, an impact load is applied, which increases the chances of roll flaws, resulting in roll replacement costs and rolling stoppages for roll replacement. The time loss was a problem. Therefore, if multiple pieces of steel are connected in advance and rolled continuously, the above problem will not occur and productivity will be improved. It is conceivable that this can be significantly improved.
一般に、比較的板厚の薄い鋼板(初期板厚10+w+以
下)を連続冷間圧延する場合には、第1図に示される工
うなフラッシュバット溶接等で鋼材を接続する方法が採
用されているが、熱間圧延工程では板厚が厚い(初期板
厚 30〜2ぢ0■)ため溶接装置能力が不足し、この
ような方法では全断面を短時間で接合することは困難で
ある。Generally, when continuously cold rolling relatively thin steel plates (initial thickness 10+w+ or less), a method of connecting the steel materials using flash butt welding or the like shown in Figure 1 is used. In the hot rolling process, the welding equipment capacity is insufficient because the plate is thick (initial plate thickness 30 to 20 cm), and it is difficult to join the entire cross section in a short time using such a method.
そこで、第2図お工び第3図に見られるように、前後の
鋼片の端部金型ね合わせ、鋲ま7Cは釘状材を打込んだ
り、溶接したりして仮止めしたのちロール等で圧接する
方法があるが、これらの方法も板厚50閣以上の厚鋼片
には殆んど採用不可能であり、ま7c30〜50mmの
板厚の場合でも重ね部を長<(100m以上)取らなけ
ればならず、該部分は通常部とは異なる特殊な予圧延工
程上必要とし、さらに、これら接合部分鉱最終的には切
取ってスクラップ化されるので接合部分が長いほど製品
の歩留りが悪化するという欠点もあった。このため、初
期板厚30〜250闘の厚鋼片を高能率、低コストで接
続して連続熱間圧延し得る技術の開発が強く要望されて
きた。Therefore, as shown in Fig. 2 and Fig. 3, the end molds of the front and rear steel pieces were fitted together, and the rivet 7C was temporarily fixed by driving a nail-like material or welding. There is a method of pressure welding with rolls, etc., but these methods are almost impossible to use for thick steel pieces with a thickness of 50 mm or more, and even in the case of a plate thickness of 30 to 50 mm, the overlapped part cannot be made long. 100m or more), and this part is required for a special pre-rolling process that is different from the normal part.Furthermore, these joint parts are ultimately cut off and scrapped, so the longer the joint part, the worse the product. There was also the drawback that the yield of For this reason, there has been a strong demand for the development of a technology that can connect and continuously hot-roll thick steel slabs with an initial thickness of 30 to 250 mm with high efficiency and low cost.
本発明は、以上の工うな従来の間鴎点に鑑み、厚鋼片を
簡単な工程で高能率に接合でき、し〃≧も、完全な接合
が得られる淳鋼材の接合方法會提供することt目的とす
るものであって、複数の鋼片を連続して圧延する鋼片の
熱間連続圧延工程において、先行鋼片の後端部と後行鋼
片の先端部を耐熱走行ベルト上に所定間隔tおいて設置
し、この間隙両側の開口部に外方1夛水冷した銅当金を
押し付け、前記先行鋼片後端部。In view of the above-mentioned conventional problems, the present invention provides a method for joining thick steel materials, which can join thick steel pieces with a simple process and with high efficiency, and which can also achieve a perfect joint. In the hot continuous rolling process of steel billets in which multiple steel billets are continuously rolled, the trailing end of the leading billet and the tip of the trailing billet are placed on a heat-resistant running belt. Installed at a predetermined interval t, one water-cooled copper dowel is pressed outward into the openings on both sides of this gap, and the rear end of the preceding steel piece is pressed.
後行鋼片先端部お工び銅当金で形成された空間に高温溶
鋼全注入し、前記ベルト上を走行させながら前記溶鋼を
冷却凝固させ1cのち、鋼片全連続圧延すること全特徴
とする。All of the high temperature molten steel is injected into the space formed by the copper dowel at the leading end of the trailing billet, the molten steel is cooled and solidified while running on the belt, and after 1c, the billet is fully continuously rolled. do.
以下、図面に工す本発明方法の詳細につき説明する。Hereinafter, details of the method of the present invention applied to the drawings will be explained.
第4図、第5図お工び第6図は本発明方法が実施される
状況全示したもので、第4図は溶鋼注入ならびに冷却時
の側断面図、第5図は同平面図、第6図は圧延時の側断
面図である。高温の鋼片1,2は耐熱走行ベルト8上に
載置されて移動する。この時、先行鋼片lの後端部と後
行鋼片2の先端部との間には、間NWが保持されている
。仁のWの間隙の鋼片幅方向両側の開口部分は、銅製の
当金9で閉塞される。この当金9はウォータジャケット
となっておジ、冷却水10にL!ll冷却されるもので
あり、鋼片幅方向外方↓りFlの力で押し付けられてい
る。Figures 4 and 5 show the entire situation in which the method of the present invention is carried out. Figure 4 is a side sectional view during injection and cooling of molten steel, Figure 5 is a plan view of the same, FIG. 6 is a side sectional view during rolling. The hot steel pieces 1 and 2 are placed on a heat-resistant running belt 8 and moved. At this time, a gap NW is maintained between the rear end portion of the leading steel piece l and the tip end of the trailing steel piece 2. The openings on both sides of the gap W in the width direction of the steel strip are closed with copper pads 9. This deposit 9 becomes a water jacket, and the cooling water 10 is L! ll is cooled, and is pressed outward in the width direction of the steel piece with a force of Fl.
このような状態で先行鋼片1と後行鋼片2とt耐熱走行
ベルト8で移動させながら、前記Wの間隙、すなわち先
行鋼片lの後端部、後行鋼片2の先端部お工び銅当金9
にニジ形成された空間に溶鋼3を注入する。この溶銅3
は、空間の上方にセットされ高温の溶鋼6會収容した溶
鋼容器7ρ)ら注入される。溶鋼容器7は耐火物内張を
有するとリペまたはタンディツシュであり、図示しない
が下部の溶鋼注出ノズルにストッパを備え、このストッ
パの操作にエカ前記空間への溶鋼注入翻始ならひに閉止
が行われる。In this state, while moving the leading steel slab 1, the trailing steel slab 2, and the heat-resistant traveling belt 8, the gap W, that is, the rear end of the leading steel slab 1, the tip end of the trailing steel slab 2, and the Machined copper dowel 9
The molten steel 3 is injected into the space formed in the hole. This molten copper 3
is injected from a molten steel container 7ρ) set above the space and containing six volumes of high-temperature molten steel. The molten steel container 7 has a refractory lining and is equipped with a stopper on the lower molten steel pouring nozzle (not shown). It will be done.
図中5でボされているのは、溶9143の表面に浮遊す
るスラグである。In the figure, 5 is the slag floating on the surface of the melt 9143.
溶鋼3が前記空間を満たすまで注入が終れば前記溶鋼容
器7會撤去し、鋼片1,2はそのまま耐熱走行ベルト8
に↓り移送され、その閾に#gI143は冷却凝固して
接合層4となり、先行鋼片1と後行鋼片2とはこの接合
層4を介して接合された状態となる。この状態で鋼片1
,2はさらに耐熱走行ベルト8で送られて圧延ロール1
1に導かれ、板厚10ρ1ら11に圧延され、さらに図
示しない下流側の圧延機群を順次通過して連続的に薄板
等の製品に圧延される。なお、12は耐熱走行ベルト駆
動ローラである。When the injection of molten steel 3 is completed until it fills the space, the molten steel container 7 is removed, and the steel slabs 1 and 2 are placed on the heat-resistant running belt 8.
#gI 143 is transferred to the threshold and cooled and solidified to form a bonding layer 4, and the leading steel piece 1 and the trailing steel piece 2 are in a state of being joined via this bonding layer 4. In this state, steel piece 1
, 2 are further conveyed by a heat-resistant running belt 8 to the rolling roll 1.
1 and rolled to a plate thickness of 10ρ1 to 11, and then sequentially passed through a group of rolling mills on the downstream side (not shown) to be continuously rolled into products such as thin plates. Note that 12 is a heat-resistant running belt drive roller.
一般に鋼片の熱間圧延では、板厚はスラブの場合200
〜250 wa、 バー(D場合30〜5゜瓢、温度は
スラブの場合1150℃程度、パーの場合1000℃程
度に加熱されている。従って、接合部表面(前記鋼片1
,2の端面)を前もって高圧水等にエタデスヶーリング
し、さらに委すればその表面に還元剤やフラックスを吹
きっけた上で前記のように溶鋼を注入すると、溶鋼3は
その上表面に生じたスラグ5で大気を遮断しながら前記
接合部表面と接触し、その保有熱で鋼片1,2の一部が
溶融する。そして前記の如く溶鋼3が冷却凝固すること
によって鋼片1゜2は浴94I43が凝固した接合rt
ti4*介して接合されることとなる。なお、上記フラ
ックスには公知の−q酸、珪醒ソーダ等が用いられる。Generally, when hot rolling steel billets, the plate thickness is 200 mm for slabs.
~250 wa, the bar (30~5° for D) is heated to about 1150°C for slab and 1000°C for par.
, 2 (end faces of 2) in advance with high-pressure water, etc., and then spray a reducing agent or flux on the surface and then inject molten steel as described above, the molten steel 3 The generated slag 5 contacts the surface of the joint while blocking the atmosphere, and a portion of the steel slabs 1 and 2 melts due to the retained heat. Then, as mentioned above, the molten steel 3 cools and solidifies, and the steel slab 1゜2 becomes the joint rt where the bath 94I43 has solidified.
They will be joined via ti4*. In addition, the well-known -q acid, silicate soda, etc. are used for the above-mentioned flux.
また、上記工程において、溶鋼の凝固時には収縮を生ず
るので後行鋼片2の後方刀1ら力Fzk加えて押し付け
る。次に、溶鋼3が冷却し凝固が完了した状態で銅当金
9を取り除き、鋼片1,2は圧延ロール11に送給され
て連続圧延されるが、圧延ローラに入る前に接合層4の
上外面に残存しているスラグ5はデスケーラ(図示しな
いンに工って除去される。なお、第6図のCFI)は先
行鋼片1の圧延状況を、(b)は接合i、1i4が圧延
ロール11を通過した後の後行鋼片2の圧延状況を示し
ている。In addition, in the above process, since contraction occurs when the molten steel solidifies, a force Fzk is applied to the rear blade 1 of the trailing steel piece 2 to press it. Next, after the molten steel 3 has cooled and solidified, the copper dowel 9 is removed, and the steel slabs 1 and 2 are fed to the rolling rolls 11 and continuously rolled. The slag 5 remaining on the upper and outer surfaces of the slab is removed by a descaler (not shown).The CFI in Figure 6 shows the rolling status of the preceding slab 1, and (b) shows the rolling status of the preceding slab 1. shows the rolling status of the trailing steel billet 2 after passing through the rolling rolls 11.
く実施例〉
供試鋼片として板厚250■、板幅1000mmのスラ
ブと板厚50m、板幅1000■のバー上用い、本発明
による方法に工って鋼片の接合試験葡行い、溶鋼の温度
、鋼片間の間隙W【椎々に変化させた場合の接合状態を
調査、検討した。Examples〉 A slab with a thickness of 250mm and a width of 1000mm and a bar with a thickness of 50m and a width of 1000mm were used as specimen steel pieces, and a joining test of the steel pieces was conducted using the method according to the present invention. We investigated and examined the bonding conditions when the temperature and the gap W between the steel pieces were varied.
その結果に&表に示す。The results are shown in &Table.
この試験の結果に工れば、溶鋼の温度が低い場合や間隙
が狭い場合に接合不良が生じ、逆に間隙が広過ぎる場合
に収縮にLる割れや凝固時間が長くなる不具合を生じ、
連続圧延が不可能となる。(賦香1,5,6.10)L
かし、溶鋼温度や間隙?適正にした場合には良好な接合
状態が得られ、連続圧延が可能であった。(賦香2,3
,4,7.9)かくして、適正な溶鋼温度や間隙Wの[
[’li−選定することにニジ、本発明に↓つて高温鋼
片を高能率に接合して連続圧延上行うことが充分可能で
あることが立証された。Based on the results of this test, poor joining will occur if the temperature of the molten steel is low or the gap is narrow, and conversely, if the gap is too wide, cracks due to shrinkage or problems such as a prolonged solidification time will occur.
Continuous rolling becomes impossible. (Incense 1, 5, 6.10) L
However, molten steel temperature and gap? When properly applied, a good bonding state was obtained and continuous rolling was possible. (Incense 2, 3
, 4, 7.9) Thus, appropriate molten steel temperature and gap W [
It has been proved that it is possible to join high-temperature steel billets with high efficiency and carry out continuous rolling according to the present invention.
以上の説明ニジ明らη≧なとおシ、本発明方法は耐熱走
行ベルト上に所定間1!Ja−おいて設置され九両鋼片
間に溶鋼を注入、凝固させることに工って厚鋼片の接合
を行うものであり、接合前に鋼片端部を特別な形状に成
形しておく必要が全くなく、溶鋼の注入、冷却だけで接
合が完了し、きわめて高能率に鋼片の接合を行うことが
でき、圧延作業の生産性向上に寄与するところが大きい
。また、連続熱間圧延設備は一般に製鋼工場に近接して
設けられることが多いので、本発明方法は製鋼造塊作業
の余り湯等を利用して軽済的にも有利に実施することが
できる。It is clear from the above explanation that η≧, and the method of the present invention is applied to the heat-resistant running belt for a predetermined period of time. This is a method to join thick steel pieces by injecting molten steel between two steel pieces and solidifying it, and the ends of the steel pieces must be formed into a special shape before joining. There is no problem at all, and joining can be completed simply by injecting molten steel and cooling, making it possible to join billets with extremely high efficiency, which greatly contributes to improving the productivity of rolling operations. Furthermore, since continuous hot rolling equipment is generally installed close to a steelmaking factory, the method of the present invention can be carried out advantageously in terms of cost by utilizing leftover hot water from steelmaking ingot operations. .
第1図は鋼板の接合方法を示す説明図、第2図、第3図
は従来の鋼片接合方法を示す説明図、第4図は本発明方
法による溶鋼注入、冷却時の側断面図、第5図は同平面
図、第6図は圧延時の側断面図である。
図面中、
1は先行鋼片、
2は後行鋼片、
3は溶鋼、
4は接合層、
7は溶鋼容器、
8は耐熱走行ベルト、
9は銅当金、
10は冷却水、
11は圧延ロールである。
特許出願人
三菱重工業株式会社
復代理人
弁理士 光 石 士 部(他1名〕Fig. 1 is an explanatory diagram showing a method of joining steel plates, Figs. 2 and 3 are explanatory diagrams showing a conventional method of joining steel plates, and Fig. 4 is a side sectional view of molten steel injection and cooling according to the method of the present invention. FIG. 5 is a plan view of the same, and FIG. 6 is a side sectional view during rolling. In the drawing, 1 is a leading steel piece, 2 is a trailing steel piece, 3 is molten steel, 4 is a bonding layer, 7 is a molten steel container, 8 is a heat-resistant running belt, 9 is a copper dowel, 10 is a cooling water, 11 is a rolling It's a roll. Patent applicant: Mitsubishi Heavy Industries, Ltd. Patent attorney: Shibu Mitsuishi (and 1 other person)
Claims (1)
において、先行鋼片の後端部と後行鋼片の先端部全耐熱
走行ベルト上に所足間隙會おいて設置し、この間隙両側
の開口部に外方工p水冷した銅当金全弁し付け、前記先
行鋼片後端部、後行鋼片先端部お工び銅当金で形成され
た空間に高温溶鋼を注入し、前記ベルト上を走行させな
がら前記溶鋼を冷却凝固させたのち鋼片を連続圧延する
ことを特徴とする高温厚鋼材の連続接合法。In the continuous hot rolling process of steel billets in which a plurality of steel billets are continuously rolled, the rear end of the leading steel billet and the tip of the trailing steel billet are all placed on the heat-resistant running belt with a certain gap, Attach water-cooled copper dowels to the openings on both sides of this gap, and pour high-temperature molten steel into the space formed by the copper dowels at the rear end of the preceding steel piece and the tip of the trailing steel piece. A method for continuously joining high-temperature thick steel materials, characterized in that the molten steel is injected, cooled and solidified while traveling on the belt, and then the billet is continuously rolled.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6993784A JPS60213383A (en) | 1984-04-10 | 1984-04-10 | Continuous joining method of high-temperature thick steel plates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6993784A JPS60213383A (en) | 1984-04-10 | 1984-04-10 | Continuous joining method of high-temperature thick steel plates |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60213383A true JPS60213383A (en) | 1985-10-25 |
Family
ID=13417074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6993784A Pending JPS60213383A (en) | 1984-04-10 | 1984-04-10 | Continuous joining method of high-temperature thick steel plates |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60213383A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0847815A1 (en) * | 1996-12-14 | 1998-06-17 | Sms Schloemann-Siemag Aktiengesellschaft | Method and device for rolling billets |
-
1984
- 1984-04-10 JP JP6993784A patent/JPS60213383A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0847815A1 (en) * | 1996-12-14 | 1998-06-17 | Sms Schloemann-Siemag Aktiengesellschaft | Method and device for rolling billets |
US5992001A (en) * | 1996-12-14 | 1999-11-30 | Sms Schloemann-Siemag Ag | Method and apparatus for connecting billets |
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