JPS5978706A - Train of installation for producing seamless steel pipe - Google Patents
Train of installation for producing seamless steel pipeInfo
- Publication number
- JPS5978706A JPS5978706A JP18821182A JP18821182A JPS5978706A JP S5978706 A JPS5978706 A JP S5978706A JP 18821182 A JP18821182 A JP 18821182A JP 18821182 A JP18821182 A JP 18821182A JP S5978706 A JPS5978706 A JP S5978706A
- Authority
- JP
- Japan
- Prior art keywords
- mill
- rolling
- turntable
- pipe
- steel pipe
- 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
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、素管の進路に沿って順次配列された圧延機群
と直接焼入装置とからなる継目無鋼管の製造設備列に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a series of seamless steel pipe manufacturing equipment consisting of a group of rolling mills and a direct hardening device arranged sequentially along the course of the raw pipe.
高強度、高靭性継目無鋼管を調質圧延によって製造する
方法として、(1)圧延後に室温まで冷却した素゛管を
誘導加熱装置によって再加熱した後に焼入れる方法、(
2)熱間圧延後のオーステナイト状態にある素管をその
ま\焼入れる直接焼入れ方法のいずれかがあるが、省エ
ネルギー、生産性の面から直接焼入れによる方法が優れ
ている。このような直接焼入れを行なう場合には、熱間
圧延後に、長手方向の温度分布が一様である高温の素管
を得ることが必要となる。Methods for manufacturing high-strength, high-toughness seamless steel pipes by temper rolling include (1) a method of cooling the raw pipe to room temperature after rolling, reheating it with an induction heating device, and then quenching it;
2) There is a direct quenching method in which the raw pipe in the austenitic state after hot rolling is quenched as it is, but the direct quenching method is superior in terms of energy saving and productivity. When performing such direct quenching, it is necessary to obtain a high-temperature mother tube with a uniform temperature distribution in the longitudinal direction after hot rolling.
ところで、第1図は従来例に係る継目無鋼管の製造設備
列を示す配置図である。回転炉床式の加熱炉1において
加熱された丸ビレットは、ピアサ−ミル2によって穿孔
され、次いでエロンゲーターミル3、プラグミル4にお
いて延伸圧延され、更にリーラ−ミル5において成形圧
延され、再加熱炉6において均熱された後、サイザーミ
ル7で所定の外径に定形圧延され、直接焼入れ装置R8
において焼入れを施されるようになっている。By the way, FIG. 1 is a layout diagram showing a row of manufacturing equipment for seamless steel pipes according to a conventional example. The round billet heated in a rotary hearth type heating furnace 1 is perforated by a piercer mill 2, then elongated and rolled in an elongator mill 3 and a plug mill 4, further formed and rolled in a reeler mill 5, and then transferred to a reheating furnace. After being soaked in step 6, it is rolled to a predetermined outer diameter in a sizer mill 7, and then directly quenched in a hardening device R8.
It is then hardened in the process.
しかしながら、上記従来例に係る製造設備列においては
、エロンゲータ−ミル3、プラグミル4、リーラ−ミル
5からなる圧延機群の全゛Cの圧延機を、被圧延材とし
ての素管が、先行圧延機の圧延先端側から圧延されるよ
うに、先行圧延機と同一方向に配置している。すなわち
、圧延素管の噛み込み端は、各圧延機を通じて常に同一
であり、均一な長手方向温度分布をもつ素管を得るには
困難がある。すなわち、素管の噛み込み端近傍は低温の
プラグが押込まれるために大きな温度低下を生ずるが、
後端部では圧延摩擦熱、素管の放熱によってプラグが昇
温しでおり、そのプラグに接する素管の温度低下は小と
なる。この素管の両端温度差は、プラグを保有する各圧
延機を通過する毎に重畳され、最終圧延機の出側では非
常に大となる。However, in the production equipment row according to the above-mentioned conventional example, all the rolling mills of the rolling mill group consisting of the elongator mill 3, the plug mill 4, and the reeler mill 5 are used to roll the blank tube as the material to be rolled. It is arranged in the same direction as the preceding rolling mill so that rolling is performed from the rolling tip side of the mill. That is, the biting end of the rolled blank tube is always the same throughout each rolling mill, making it difficult to obtain a blank tube with a uniform longitudinal temperature distribution. In other words, there is a large temperature drop near the biting end of the raw pipe because the low temperature plug is pushed in, but
At the rear end, the temperature of the plug increases due to rolling friction heat and heat dissipation from the raw tube, and the temperature drop of the raw tube in contact with the plug is small. This temperature difference between both ends of the raw tube is superimposed each time it passes through each rolling mill that has a plug, and becomes extremely large at the exit side of the final rolling mill.
このような長手方向に温度差がある′素管を直接焼入れ
装置8において焼入れする場合には、温度差に起因する
曲がり、機械的特性のばらつきを生ずる。また、上記継
目無鋼管の製造設備列は、圧延工程が長大であるために
、圧延の進行に伴う素管の温度低下も非常に大である。When such a blank tube with a temperature difference in the longitudinal direction is directly hardened in the hardening device 8, bending and variations in mechanical properties occur due to the temperature difference. Furthermore, since the rolling process in the above-mentioned seamless steel pipe manufacturing equipment row is long, the temperature of the base pipe decreases significantly as the rolling progresses.
したかつ・て、上記従来の製造設備列にあっては、焼入
れされる素管の長手方向温度分布を均一化し、かつ焼入
れに必要な程度に高温な素管を得るために、素管を均一
加熱する再加熱炉6を必ず備える必要がある。In addition, in the conventional manufacturing equipment array mentioned above, in order to equalize the longitudinal temperature distribution of the raw tube to be quenched and to obtain the raw tube at a high temperature necessary for quenching, the raw tube is heated uniformly. It is absolutely necessary to provide a reheating furnace 6 for heating.
そこで、本出願人は、昭和56年12月7日付特許願に
添付した明細書および図面において、圧延中における素
管の長手方向温度分布の均一化を図るべく、「製造設備
列を形成している圧延機群の少なくとも一基の圧延機を
、被圧延材が先行圧延機の圧延尾端側から圧延されるよ
うに、先行圧延機と逆方向に配置した製造設備列」を提
案している。このすでに提案している製造設備列によれ
ば、例えば第2図に示すように、プラグミル4のエロン
ゲータ−ミル3に対する配置を変更することにより、エ
ロンゲータ−ミル3によって圧延された素管の尾端がプ
ラグミル4における噛み込み端となり、ピアサ−ミル2
およびエロンゲータ−ミル3で発生した長手方向温度差
がプラグミル4、リーラ−ミル5で吸収可能となる。な
お、第2図における各構成設備は第1図におけると同様
であり、それぞれ第1図におけると同一符号を付されて
いる。Therefore, in the specification and drawings attached to the patent application dated December 7, 1981, the applicant proposed that ``manufacturing equipment rows be formed to uniformize the temperature distribution in the longitudinal direction of the raw tube during rolling. ``Production equipment array in which at least one rolling mill in a rolling mill group is arranged in the opposite direction from the preceding rolling mill so that the material to be rolled is rolled from the rolling tail end side of the preceding rolling mill.'' . According to this already proposed manufacturing equipment series, as shown in FIG. 2, for example, by changing the arrangement of the plug mill 4 with respect to the elongator mill 3, becomes the biting end in the plug mill 4, and the piercer mill 2
The longitudinal temperature difference generated in the elongator mill 3 can be absorbed by the plug mill 4 and the reeler mill 5. Note that each component equipment in FIG. 2 is the same as in FIG. 1, and is given the same reference numeral as in FIG. 1, respectively.
しかしながら、このすでに提案されている製造設備列に
おいても、素管の各圧延機間における移送距離を従来例
による場合に比して顕著に短縮することはできず、直接
焼入れに必要な高温度状態を素管に惺持させることは困
難である。However, even with this line of manufacturing equipment that has already been proposed, it is not possible to significantly shorten the transfer distance of the raw tube between each rolling mill compared to the conventional method, and the high temperature required for direct quenching cannot be achieved. It is difficult to maintain this in the raw pipe.
本発明は、素管長手方向の温度分布を均一とし、かつ素
管の温度低下を極力抑えるこ♂により、均熱処理するこ
となくもしくは短時間の再加熱を加えるのみによって、
均一な焼入れ組織の鋼管を得ることができる継目無鋼管
の製造設備列を提供することを目的とする。The present invention makes the temperature distribution in the longitudinal direction of the raw pipe uniform and suppresses the temperature drop of the raw pipe as much as possible, thereby achieving a
An object of the present invention is to provide a line of seamless steel pipe manufacturing equipment that can produce steel pipes with a uniform hardened structure.
上記目的を達成するために、本発明は、素管の進路に沿
って順次配列された圧延機群と直接焼入れ装置とからな
る継目無鋼管の製造設備列において、少なくとも一組の
隣接する圧延機間に、素管を長手方向において反転し、
先行圧延機における該素管の圧延尾端側を後続圧延機に
対する噛み込み端側とし、該素管を該後続圧延機へ移送
するターンテーブルを設けるようにしたものである。In order to achieve the above object, the present invention provides at least one set of adjacent rolling mills in a row of seamless steel pipe manufacturing equipment consisting of a rolling mill group and a direct quenching device arranged sequentially along the course of the raw pipe. In the meantime, the raw pipe is reversed in the longitudinal direction,
The rolling tail end side of the blank tube in the preceding rolling mill is the biting end side for the succeeding rolling mill, and a turntable is provided for transferring the blank tube to the succeeding rolling mill.
以下、本発明の実施例を図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
第3図は本発明の第1実施例を示す配置図である。加熱
炉11で加熱された丸ビレットは、ピアサ−ミル12、
エロンゲータ−ミル13、プラグミル14、リーラ−ミ
ル15によって順次圧延された後、サイザーミル16に
おいて所定の外径に定形圧延され、更に直接焼入れ装置
17において直接焼入れを施されるようになっている。FIG. 3 is a layout diagram showing a first embodiment of the present invention. The round billet heated in the heating furnace 11 is passed through a piercer mill 12,
After being sequentially rolled by an elongator mill 13, a plug mill 14, and a reeler mill 15, it is rolled to a predetermined outer diameter in a sizer mill 16, and then directly hardened in a direct hardening device 17.
しかして、この第1実施例においては、ピアサ−ミル1
2とエロンゲータ−ミル13との間、エロンゲータ−ミ
ル13きプラグミル14きの間、プラグミル14とリー
ラ−ミル15との間にそれぞれターンテーブル1B、1
9.20が配置されている。ターンテーブル18は、ピ
アサ−ミル12による圧延後の素管を受入れた後、90
度転回し、ピアサ−ミル12によって圧延された素管の
尾端をエロンゲータ−ミル13における噛み込み側に位
置せしめ、この素管をエロンゲータ−ミル13に移送可
能としている。また、ターンテーブル19は、エロンゲ
ータ−ミル13による圧延後の素管を受入れた後、90
度転回し、エロンゲータ−ミル13によって圧延された
素管の尾端をプラグミル14における噛み込み側に位置
せしめ、この素管をプラグミル14に移送可能としてい
る。また、ターンテーブル20は、プラグミル14によ
る圧延後の素管を受入れた後、90度転回し、プラグミ
ル14によって圧延された素管の尾端をリーラ−ミル1
5における噛み込み側に位置せしめ、この素管をリーラ
−ミル15に移送可能さしている。Therefore, in this first embodiment, the piercer mill 1
2 and the elongator mill 13, between the elongator mill 13 and the plug mill 14, and between the plug mill 14 and the reeler mill 15, the turntables 1B and 1 are installed, respectively.
9.20 is placed. After receiving the raw pipe rolled by the piercer mill 12, the turntable 18
The tail end of the raw pipe rolled by the piercer mill 12 is positioned on the biting side of the elongator mill 13, so that the raw pipe can be transferred to the elongator mill 13. Further, the turntable 19 receives the raw pipe after rolling by the elongator mill 13, and then
The tail end of the blank tube rolled by the elongator mill 13 is positioned on the biting side of the plug mill 14, so that the blank tube can be transferred to the plug mill 14. Further, after receiving the raw pipe rolled by the plug mill 14, the turntable 20 turns 90 degrees and transfers the tail end of the raw pipe rolled by the plug mill 14 to the reeler mill 1.
It is located on the biting side of 5, so that this raw tube can be transferred to a reeler mill 15.
この第1実施例によれば、各圧延機間で、素管の噛み込
み端が反転されることにより、素管の長手方向における
温度分布が均一化されるとともに、移送距離が短縮し素
管の温度降下を゛抑制することが可能となる。すなわち
、直接焼入れ装置17において直接焼入れするに好適な
均一温度かつ高温度の素管を容易に得ることが可能とな
る。According to this first embodiment, by reversing the biting end of the raw tube between each rolling mill, the temperature distribution in the longitudinal direction of the raw tube is made uniform, and the transfer distance is shortened. It becomes possible to suppress the temperature drop. In other words, it is possible to easily obtain a raw tube having a uniform temperature and a high temperature suitable for direct hardening in the direct hardening device 17.
第4図は本発明の第2実施例を示す配置図であり、前記
第1実施例におけると同−設備は同一符号を付すことに
よって説明を省略する。この第2実施例が、前記第1実
施例と異なる点は、エロンゲータ゛−ミル13−と、プ
ラグミル14との間にのみターンテーブル21を介装し
た点にある。すなわち、この第2実施例におけるように
、−組の圧延機間にのみターンテーブルを設ける場合に
は、各圧延機のうち、エロンゲータ−ミル13とプラグ
ミル14(!:の間に設けるのが効果的である。FIG. 4 is a layout diagram showing a second embodiment of the present invention, and the same equipment as in the first embodiment is given the same reference numerals, and a description thereof will be omitted. This second embodiment differs from the first embodiment in that a turntable 21 is interposed only between the elongator mill 13 and the plug mill 14. That is, when a turntable is provided only between the - set of rolling mills as in this second embodiment, it is effective to provide it between the elongator mill 13 and the plug mill 14 (!:) of each rolling mill. It is true.
次に、上記第2実施例に係る具体的実施結果について説
明する。この具体的実施例における試験材Gl、X52
級で製品寸法が外径ツイフチ、厚み18鶴、長さ12m
とされ、加熱炉11による素材加熱温度は、1280℃
とされている。この試験材をピアサ−ミル12、エロン
ゲータ−ミル13で圧延した後、エロンゲータ−ミル1
3の出側で転回し、プラグミル14、リーラ−ミル15
、サイザーミル16によって圧延を行な゛つた後、各圧
延機の出側における先端部(A)温度およびf&端部(
B)温度、ならびに直接焼入れ後の平均断面硬度を測定
し、表1に示すような測定結果を得た。なお、従来法に
よる実施結果を併記した。この表1によれば、リーラ−
ミル15の出側における管端温度差が、従来法における
70℃に比して、本発明によれば20″Cと極めて小と
なり、再加熱する表1.被圧延素管の管端温度と平均断
面硬度ことなく長手方向温度分布が均一化可能となるこ
とが認められる。また、平均断面硬度も、本発明による
直接焼入れによれば、従来法の再加熱後に直接焼入れし
た場合と同等の値を得ることが可能となり、直接焼入れ
に必要な程度の高温度状態が十分に保持可能となること
が認められる。Next, specific implementation results according to the second example will be explained. Test material Gl, X52 in this specific example
The product dimensions are 18 mm in outer diameter, 18 meters in thickness, and 12 meters in length.
The temperature at which the material is heated by the heating furnace 11 is 1280°C.
It is said that After rolling this test material with piercer mill 12 and elongator mill 13,
Turn on the exit side of 3, plug mill 14, reeler mill 15
, after rolling by the sizer mill 16, the temperature at the tip (A) and the temperature at the f & end (
B) Temperature and average cross-sectional hardness after direct quenching were measured, and the measurement results shown in Table 1 were obtained. The results obtained using the conventional method are also listed. According to Table 1, the reeler
According to the present invention, the difference in tube end temperature at the exit side of the mill 15 is extremely small at 20"C compared to 70°C in the conventional method, and the temperature difference at the tube end of the rolled blank tube during reheating is extremely small. It is recognized that the temperature distribution in the longitudinal direction can be made uniform without increasing the average cross-sectional hardness.Also, according to the direct quenching according to the present invention, the average cross-sectional hardness is equivalent to the value obtained when direct quenching is performed after reheating in the conventional method. It is recognized that it is possible to obtain a high temperature state necessary for direct quenching.
すなわち、本発明に係る製造設備列によれば、(1)燃
料原単位を削減することが可能となる。1すなわち、従
来法においては、リーラ−ミルによる圧延後に、素管の
組成、肉厚に応じて900〜950℃の再加熱炉内に1
0分程度保持され、サイザーミルによる圧延を経て直接
焼入れを施されていた。That is, according to the manufacturing equipment array according to the present invention, (1) it is possible to reduce the fuel consumption rate. 1. In other words, in the conventional method, after rolling with a reeler mill, 1
It was held for about 0 minutes, rolled with a sizer mill, and then directly quenched.
ところが、本発明によれば、厚肉管においては全く再加
熱(均熱処理)なしで良質な焼入れ鋼管を得るときが可
能となり、均熱に要するエネルギー原単位を削減するこ
とが可能きなる。(2)再加熱工程での作業時間が不要
となり、サイクルタイムが短縮し、生産性の向上を図る
ことが可能となる。However, according to the present invention, it is possible to obtain high-quality hardened steel pipes without any reheating (soaking treatment) for thick-walled pipes, and it is possible to reduce the energy consumption required for soaking. (2) Work time in the reheating step is no longer required, cycle time is shortened, and productivity can be improved.
(3) 直接焼入れ前に均熱処理が必要な材料につい
ても、本発明の実施によって管端温度差が小で、温度分
布の均一な温度状態からの再加熱(均熱)であるために
、材料の全域に同一加熱速度、同一均熱保持時間を与え
ることが可能となり、材料の均質化をより一層図ること
が可能となる。(3) Even for materials that require soaking treatment before direct quenching, implementation of the present invention allows reheating (soaking) from a state with a small tube end temperature difference and uniform temperature distribution. It becomes possible to give the same heating rate and the same soaking time to the entire area, and it becomes possible to further homogenize the material.
なお、上記各実施例は本発明をプラグミル方式による継
目無鋼管の製造設備列に適用する場合について説明した
が、本発明はマンドレルミル方式による継目無鋼管の製
造設備列等、他の製造方式による場合についても同様に
適用可能である。In addition, although each of the above embodiments describes a case in which the present invention is applied to a line of seamless steel pipe manufacturing equipment using a plug mill method, the present invention is applicable to a line of seamless steel pipe manufacturing equipment using a mandrel mill method, etc. The same applies to cases.
以上のように、本発明に係る継目無鋼管の製造設備列は
、少なくとも一組の隣接する圧延機間に、素管を長手方
向において反転し、先行圧延機における該素管の圧延尾
端側を後続圧延機に対す、る噛み込み端側とし、該素管
を該後続圧延機へ移送するターンテーブルを設けるよう
にしたので、素管長手方向の温度分布を均一とし、かつ
素管の温度低下を極力抑えることが可能となる。したが
って、素管を均熱処理することなく、もしくは短時間の
再加熱を加えるのみによって、均一な焼入れ組織の鋼管
を得ることが可能となる。As described above, in the seamless steel pipe manufacturing equipment row according to the present invention, the raw pipe is reversed in the longitudinal direction between at least one set of adjacent rolling mills, and the rolling tail end side of the raw pipe in the preceding rolling mill is is the biting end side for the succeeding rolling mill, and a turntable is provided to transfer the blank tube to the succeeding rolling mill, so that the temperature distribution in the longitudinal direction of the blank tube is uniform and the temperature of the blank tube is constant. This makes it possible to suppress the decrease as much as possible. Therefore, it is possible to obtain a steel pipe with a uniform hardened structure without subjecting the raw pipe to a soaking process or only by reheating the pipe for a short time.
第1図は従来例に係る継目無鋼管の製造設備列を示す配
置図、第2図は本出願人がすでに提案している製造設備
列を示す配置図、第3図は本発明の第1実施例に係る製
造設備列を示す配置図、第4図は本発明の第2実施例に
係る製造設備列を示す配置図である。
11・・パ加熱炉、 12・、・・ピアサ−ミ
ル、13・・・エロンゲータ−ミル、
14 プラグミル、 15・ リーラ−ミル、16
・サイザーミル、 17・・・直接焼入れ装置、18.
19,20.21・・ターンテーブル。
代理人 弁理士 塩 川 修 治
第1図
第2図
第3図FIG. 1 is a layout diagram showing a row of manufacturing equipment for seamless steel pipes according to a conventional example, FIG. 2 is a layout diagram showing a row of manufacturing equipment already proposed by the applicant, and FIG. FIG. 4 is a layout diagram showing a manufacturing equipment row according to the second embodiment of the present invention. 11...Pa heating furnace, 12...Piercer mill, 13...Elongator mill, 14 Plug mill, 15. Reeler mill, 16
・Sizer mill, 17... Direct quenching device, 18.
19,20.21... Turntable. Agent Patent Attorney Osamu Shiokawa Figure 1 Figure 2 Figure 3
Claims (1)
直接焼入れ装置とからなる継目無鋼管の製造設備列にお
いて、少なくとも一組の隣接する圧延機間に、素管を長
手方向において反転し、先行圧延機における該素管の圧
延尾端側を後続圧延機に対する噛み込み端側とし、該素
管を該後続圧延機へ移送するターンテーブルを設け゛た
ことを特徴とする継目無鋼管の製造設備列。(1) A group of rolling mills arranged sequentially along the course of the raw pipe,
In a line of seamless steel pipe manufacturing equipment consisting of a direct quenching device, the raw pipe is reversed in the longitudinal direction between at least one set of adjacent rolling mills, and the rolling tail end side of the raw pipe in the preceding rolling mill is subjected to subsequent rolling. 1. A line of seamless steel pipe manufacturing equipment, characterized in that it is provided with a turntable that is placed at the biting end of the machine and that transfers the raw pipe to the subsequent rolling mill.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18821182A JPS5978706A (en) | 1982-10-28 | 1982-10-28 | Train of installation for producing seamless steel pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18821182A JPS5978706A (en) | 1982-10-28 | 1982-10-28 | Train of installation for producing seamless steel pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5978706A true JPS5978706A (en) | 1984-05-07 |
Family
ID=16219707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18821182A Pending JPS5978706A (en) | 1982-10-28 | 1982-10-28 | Train of installation for producing seamless steel pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5978706A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018075576A (en) * | 2016-11-07 | 2018-05-17 | Jfeスチール株式会社 | Manufacturing method of seamless steel pipe and manufacturing equipment of seamless steel pipe |
-
1982
- 1982-10-28 JP JP18821182A patent/JPS5978706A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018075576A (en) * | 2016-11-07 | 2018-05-17 | Jfeスチール株式会社 | Manufacturing method of seamless steel pipe and manufacturing equipment of seamless steel pipe |
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