JPH06182427A - Method for preventing carburization of seamless pipe - Google Patents

Method for preventing carburization of seamless pipe

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Publication number
JPH06182427A
JPH06182427A JP4355344A JP35534492A JPH06182427A JP H06182427 A JPH06182427 A JP H06182427A JP 4355344 A JP4355344 A JP 4355344A JP 35534492 A JP35534492 A JP 35534492A JP H06182427 A JPH06182427 A JP H06182427A
Authority
JP
Japan
Prior art keywords
pipe
sand
carburization
inside surface
pipe stock
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.)
Withdrawn
Application number
JP4355344A
Other languages
Japanese (ja)
Inventor
Toshiaki Kasuya
利昭 粕谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP4355344A priority Critical patent/JPH06182427A/en
Publication of JPH06182427A publication Critical patent/JPH06182427A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To prevent the carburization of the inside surface layer of pipe stock under a rolling process by subjecting the inside surface of the pipe stock to mechanical descaling and removing the lubricating material components existing on the inside surface of the pipe stock. CONSTITUTION:The lubricating material components (lubricants, fat and oil components) existing on the inside surface of the pipe stock are removed by the mechanical descaling, such as projecting of silica sand, etc., together with compressed air from a sand injection nozzle 14 prior to heating of the pipe stock 10 in the method for preventing the carburization of a seamless steel pipe having <=0.10% carbon content. The descaling effect is much higher than by immersion washing by polychloroethylene, alkaline liquid, etc., water washing with brushes, etc. The sand remaining on the inside surface of the pipe stock 10 is removed by injecting water from a water injection nozzle 16 after the mechanical descaling. The lubricant components sticking to the remaining sand, etc., are completely discharged and the higher effect of preventing the carburization is assured.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は継目無鋼管の浸炭防止方
法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing carburization of seamless steel pipe.

【0002】[0002]

【従来の技術】マンネスマンマンドレルミル方式による
継目無鋼管は、素管内に挿入される芯金マンドレルバー
と圧延機との摩擦係数を低減すべく、マンドレルバーに
黒鉛系または油脂類の潤滑剤を塗布し造管されている。
2. Description of the Related Art A seamless steel pipe manufactured by the Mannes mandrel mill system is coated with a graphite-based or oil-based lubricant on the mandrel bar in order to reduce the friction coefficient between the cored bar mandrel bar inserted in the raw pipe and the rolling mill. It has been piped.

【0003】このマンドレルミル方式でオーステナイト
系ステンレス鋼管や低炭素鋼管を造管すると、潤滑剤中
の炭素がマンドレルミル圧延中に管内表層に浸炭する。
また、マンドレルミル圧延中に管内面に残留する潤滑剤
中の炭素は、素管を定形圧延する前の 850〜1050℃での
再加熱時に、更に管内表層に浸炭する現象が低炭素系鋼
種で見られる特徴である。
When an austenitic stainless steel pipe or a low carbon steel pipe is produced by this mandrel mill system, carbon in the lubricant carburizes the surface layer inside the pipe during the mandrel mill rolling.
In addition, carbon in the lubricant remaining on the inner surface of the pipe during mandrel mill rolling is a low-carbon steel type that is likely to cause further carburization on the surface layer inside the pipe during reheating at 850 to 1050 ° C before the standard rolling of the base pipe. It is a characteristic that can be seen.

【0004】図3は造管過程での管内表層に生ずる浸炭
深さの推移を示すものであり、P1はマンドレルミル圧
延直後、P2は再加熱後、P3は定形圧延直後、P4は
固溶化処理後を示している。
FIG. 3 shows changes in the carburizing depth generated in the surface layer of the pipe during the pipe making process. P1 is immediately after mandrel mill rolling, P2 is after reheating, P3 is immediately after regular rolling, and P4 is solution treatment. The latter is shown.

【0005】そこで従来、上述の造管過程での浸炭を防
止するため、特開昭 58-199820号公報に記載の如くの浸
炭防止方法が提案されている。この従来技術は、鋼管を
炉内へ挿入する前に、管端を蓋等によって閉塞し、外界
で管内に満たされた空気が炉内ガスによって置換される
ことを防止しておき、管が昇温した際に管内面の潤滑剤
成分を管内の十分な酸素量によって完全に燃焼し尽く
し、結果として浸炭を防止するものである。
Therefore, in order to prevent carburization in the above-mentioned pipe making process, a carburizing prevention method as described in JP-A-58-199820 has been conventionally proposed. According to this conventional technique, before inserting the steel pipe into the furnace, the pipe end is closed by a lid or the like to prevent the air filled in the pipe in the outside from being replaced by the gas in the furnace, and the pipe rises. When heated, the lubricant component on the inner surface of the pipe is completely burned out by a sufficient amount of oxygen in the pipe, and as a result, carburization is prevented.

【0006】[0006]

【発明が解決しようとする課題】然しながら、従来技術
では、素管の管端に蓋等の閉塞具を着脱し、この閉塞具
を加熱炉の入出側間で循環使用する等、生産性が悪い。
また、潤滑剤成分が多量に残存したままの素管を加熱炉
に挿入するものであるため、浸炭を十分に防止すること
に困難がある。このため、従来技術では、浸炭による管
内面疵を研磨する必要を生じたり、製品歩止りが低くな
る等の不都合がある。
However, in the prior art, the productivity is poor in that the obturator such as a lid is attached to and detached from the tube end of the raw tube and the obturator is circulated between the inlet and outlet sides of the heating furnace. .
Further, since the raw pipe in which a large amount of the lubricant component remains is inserted into the heating furnace, it is difficult to sufficiently prevent carburization. Therefore, in the conventional technique, there are disadvantages such as the necessity of polishing the inner surface defects of the pipe due to carburization and the reduction of product yield.

【0007】本発明は、継目無鋼管の造管ラインの生産
性を損なうことなく、管内表層の浸炭を十分に防止する
ことを目的とする。
An object of the present invention is to sufficiently prevent carburization of the surface layer in a pipe without impairing the productivity of a seamless steel pipe making line.

【0008】[0008]

【課題を解決するための手段】請求項1に記載の本発明
は、炭素含有量が0.10%以下の継目無鋼管の浸炭防止方
法において、圧延過程にある素管の再加熱前に、素管内
面に砂を投射する等のメカニカルなデスケーリング加工
を施すことにより素管内面に存在している潤滑剤成分を
除去するようにしたものである。
The present invention according to claim 1 is a method for preventing carburization of a seamless steel pipe having a carbon content of 0.10% or less, in a raw pipe before reheating in the rolling process. The lubricant component present on the inner surface of the shell is removed by performing mechanical descaling such as sand projection on the surface.

【0009】請求項2に記載の本発明は、炭素含有量が
0.10%以下の継目無鋼管の浸炭防止方法において、圧延
過程にある素管の再加熱前に、素管内面に砂を投射する
等のメカニカルなデスケーリング加工を施すことにより
素管内面に存在している潤滑剤成分を除去し、更に該素
管の内面に水を噴射して素管内面に残存する砂を除去す
るようにしたものである。
The present invention according to claim 2 has a carbon content of
In the carburizing prevention method of 0.10% or less of seamless steel pipe, before the reheating of the raw pipe in the rolling process, it exists on the inner surface of the raw pipe by performing mechanical descaling such as sand projection on the inner surface of the raw pipe. The lubricant component is removed, and water is sprayed on the inner surface of the base pipe to remove the sand remaining on the inner surface of the base pipe.

【0010】[0010]

【作用】 素管の再加熱前に、素管内面に存在している潤滑剤成
分(潤滑剤、油脂分)は圧縮空気等によって砂等を投射
する等のメカニカルデスケーリングされて除去される。
この砂投射等のメカニカルデスケーリングによる潤滑成
分のデスケーリング効果は、従来のポリクロルエチレ
ン、アルカリ液等による浸漬洗浄、ブラッシング水洗等
に比して格段に大である。これにより、素管が例えば 8
50〜1050℃で再加熱されても、潤滑剤成分中の炭素が管
内表層に浸炭する可能性を排除できる。
Before the reheating of the base pipe, the lubricant components (lubricant, oil and fat) present on the inner surface of the base pipe are removed by mechanical descaling such as projecting sand by compressed air or the like.
The descaling effect of the lubricating component by mechanical descaling such as sand blasting is remarkably large as compared with the conventional immersion cleaning with polychlorethylene, alkaline solution, etc., and brushing with water. As a result, for example,
Even if it is reheated at 50 to 1050 ° C, it is possible to eliminate the possibility that carbon in the lubricant component will carburize the surface layer in the pipe.

【0011】素管内面に噴射される水は、上記のメ
カニカルデスケーリングにおいて管内に投射されて残存
する砂等を除去することにより、残存砂等に付着して管
内に残存する潤滑剤成分を完全に管外に排出せしめ、上
記の浸炭防止作用をより確実にする。
The water sprayed on the inner surface of the base pipe is removed by removing the sand and the like which are projected and left in the pipe in the mechanical descaling described above, so that the lubricant component remaining in the pipe is completely adhered to the residual sand and the like. It is discharged to the outside of the pipe to make the above carburization prevention effect more reliable.

【0012】同時に、噴射水のうちで管内に残存する水
は、素管の再加熱時に、加熱蒸発して管内に酸素雰囲気
を保持せしめ、前工程のマンドレルミル圧延段階で潤滑
剤成分中の炭素に起因して管内表層に生成せしめられた
浸炭層を拡散せしめる。
At the same time, the water remaining in the pipe out of the injected water is heated and vaporized during the reheating of the raw pipe to keep the oxygen atmosphere in the pipe, and the carbon in the lubricant component is retained in the mandrel mill rolling step of the previous process. The carburized layer generated on the surface layer of the pipe due to is diffused.

【0013】上記、により、管内面の浸炭そのも
の、あるいは浸炭による内面疵の発生を十分に防止で
き、管内面疵の研磨を不要とするとともに、製品歩止り
を向上するものとなる。そして、上記、は、素管の
管端に蓋等の閉塞具を着脱することなく、造管ライン内
で管内面に砂を投射する等のメカニカルデスケーリング
を施し、あるいは水を噴射することによって実現される
ものであり、造管ラインの生産性を損なうところがな
い。
By the above, it is possible to sufficiently prevent the carburization of the inner surface of the pipe itself or the generation of inner surface defects due to carburization, and it becomes unnecessary to polish the inner surface defects of the pipe, and the product yield is improved. And, the above is, without attaching or detaching a closing device such as a lid to the pipe end of the raw pipe, by performing mechanical descaling such as projecting sand on the pipe inner surface in the pipe making line, or by spraying water. It will be realized, and there is no loss in productivity of the pipe making line.

【0014】即ち、マンネスマンマンドレルミル方式等
による継目無鋼管の造管過程で、炭素含有量が0.10%以
下である、低炭素鋼管やオーステナイト系ステンレス鋼
管の管内表層の浸炭を十分に防止できる。
That is, in the process of producing a seamless steel pipe by the Mannesmann mandrel mill system or the like, it is possible to sufficiently prevent carburization of the surface layer of a low carbon steel pipe or an austenitic stainless steel pipe having a carbon content of 0.10% or less.

【0015】[0015]

【実施例】図1は本発明が適用される造管ラインの一例
を示す模式図、図2は本発明による浸炭防止効果を示す
線図、図3は造管過程での浸炭防止の推移を示す線図で
ある。
EXAMPLES FIG. 1 is a schematic diagram showing an example of a pipe making line to which the present invention is applied, FIG. 2 is a diagram showing the carburizing prevention effect according to the present invention, and FIG. 3 is a diagram showing the transition of carburizing prevention in the pipe making process. It is a diagram showing.

【0016】素管10は、マンドレルミルで、黒鉛ある
いは油脂類の潤滑剤を塗布されたマンドレルバーを挿入
されて圧延される。そして、マンドレルミル圧延後の素
管10は、クロップ部を切断され、再加熱炉11の入側
のローラーコンベヤライン12に搬入される。
The blank tube 10 is rolled by a mandrel mill into which a mandrel bar coated with a lubricant such as graphite or oil is inserted. Then, the mandrel mill-rolled raw pipe 10 is cut at the crop portion and carried into the roller conveyor line 12 on the inlet side of the reheating furnace 11.

【0017】ローラーコンベヤライン12に搬入された
素管10は、ストッパ13により位置決めされた直後、
砂投射ノズル14から圧縮空気とともに管内に投射され
る硅砂により素管内面をデスケーリングされ、素管内面
に存在している黒鉛等の潤滑剤成分を除去される。この
とき、素管10はターニングローラ15により回転され
ながら、砂を投射されても良い。
The raw pipe 10 carried into the roller conveyor line 12 is immediately positioned after being positioned by the stopper 13.
The inner surface of the base pipe is descaled by silica sand that is projected into the pipe together with the compressed air from the sand projection nozzle 14, and the lubricant component such as graphite existing on the inner surface of the base pipe is removed. At this time, the blank tube 10 may be projected by sand while being rotated by the turning roller 15.

【0018】砂を投射された素管10は、その後、ター
ニングローラ15により回転されながら、水噴射ノズル
16から管内に噴射される水により素管内面に残存する
硅砂を除去される。
The blank pipe 10 on which the sand has been projected is then rotated by the turning roller 15 and the silica sand remaining on the inner surface of the blank pipe is removed by the water jetted from the water jet nozzle 16 into the pipe.

【0019】尚、ローラコンベヤライン12上にストッ
パ13により位置決めされている素管10における、砂
投射ノズル14、水噴射ノズル16の反対側には集塵機
17が配置される。集塵機17は、素管10から排出さ
れる硅砂を集塵する。
A dust collector 17 is arranged on the opposite side of the sand projection nozzle 14 and the water jet nozzle 16 in the raw pipe 10 positioned by the stopper 13 on the roller conveyor line 12. The dust collector 17 collects the silica sand discharged from the raw pipe 10.

【0020】素管10は、上述の如くに、砂を投射さ
れ、水を噴射された後、再加熱炉11に挿入されて加熱
され、潤滑剤成分中の炭素に起因する浸炭促進を防止せ
しめられる。
As described above, the blank pipe 10 is sprayed with sand and sprayed with water, and then inserted into the reheating furnace 11 and heated to prevent the carburization promotion caused by the carbon in the lubricant component. To be

【0021】尚、マンドレルミルでマンドレルバーに塗
布される黒鉛系潤滑剤の成分は、例えば表1の如くであ
る。
The components of the graphite-based lubricant applied to the mandrel bar by the mandrel mill are as shown in Table 1, for example.

【0022】[0022]

【表1】 [Table 1]

【0023】また、上述の砂投射ノズル14、水噴射ノ
ズル16によるデスケーリング条件は表2の如くであ
る。
Table 2 shows the descaling conditions for the sand projection nozzle 14 and the water injection nozzle 16 described above.

【0024】[0024]

【表2】 [Table 2]

【0025】以下、本実施例の作用について説明する。The operation of this embodiment will be described below.

【0026】素管10の再加熱前に、素管10内面に
存在している潤滑剤成分(潤滑剤、油脂分)は圧縮空気
等によって投射される砂によってデスケーリングされて
除去される。この砂投射による潤滑成分のデスケーリン
グ効果は、従来のポリクロルエチレン、アルカリ液等に
よる浸漬洗浄、ブラッシング水洗等に比して格段に大で
ある。これにより、素管10が例えば 850〜1050℃で再
加熱されても、潤滑剤成分中の炭素が管内表層に浸炭す
る可能性を排除できる。
Before reheating the base pipe 10, the lubricant components (lubricant, oil and fat) present on the inner surface of the base pipe 10 are descaled and removed by sand projected by compressed air or the like. The descaling effect of the lubricating component due to the sand blast is remarkably large as compared with the conventional dipping cleaning with polychlorethylene, alkali solution, etc., and brushing water cleaning. As a result, even if the base pipe 10 is reheated at, for example, 850 to 1050 ° C., it is possible to eliminate the possibility that carbon in the lubricant component will carburize the surface layer inside the pipe.

【0027】素管10内面に噴射される水は、上記
において管内に投射されて残存する砂を除去することに
より、残存砂に付着して管内に残存する潤滑剤成分を完
全に管外に排出せしめ、上記の浸炭防止作用を寄り確
実にする。
The water sprayed on the inner surface of the raw pipe 10 is projected into the pipe in the above to remove the remaining sand, thereby completely discharging the lubricant component remaining on the pipe by adhering to the remaining sand. At the very least, ensure the above carburizing prevention effect.

【0028】同時に、噴射水の内で管内に残存する水
は、素管の再加熱時に、加熱蒸発して管内に酸素雰囲気
を保持せしめ、前工程のマンドレルミル圧延段階で潤滑
剤成分中の炭素に起因して管内表層に生成せしめられた
浸炭層を拡散せしめる。
At the same time, the water remaining in the pipe in the jet water is heated and vaporized during the reheating of the raw pipe to keep the oxygen atmosphere in the pipe, and the carbon in the lubricant component is retained in the mandrel mill rolling step of the previous process. The carburized layer generated on the surface layer of the pipe due to is diffused.

【0029】上記、により、管内面の浸炭そのも
の、あるいは浸炭による内面疵の発生を十分に防止で
き、管内面疵の研磨を不要とするとともに、製品歩止り
を向上するものとなる。そして、上記、は、素管1
0の管端に蓋等の閉塞具を着脱することなく、造管ライ
ン内で管内面に砂を投射し、あるいは水を噴射すること
によって実現されるものであり、造管ラインの生産性を
損なうところがない。
By the above, carburization itself on the inner surface of the pipe or inner surface defects due to carburization can be sufficiently prevented, polishing of the inner surface defects of the pipe is unnecessary, and product yield is improved. And, the above is the tube 1
It is realized by projecting sand or spraying water on the inner surface of the pipe in the pipe making line without attaching or detaching a closing device such as a lid to the pipe end of 0. There is no place to lose.

【0030】即ち、マンネスマンマンドレルミル方式等
による継目無鋼管の造管過程で、炭素含有量が0.10%以
下である、低炭素鋼管やオーステナイト系ステンレス鋼
管の管内表層の浸炭を十分に防止できる。
That is, in the process of producing a seamless steel pipe by the Mannesmann mandrel mill method or the like, it is possible to sufficiently prevent carburization of the surface layer inside the low carbon steel pipe or the austenitic stainless steel pipe having a carbon content of 0.10% or less.

【0031】図1の造管ラインで、SUS304L 、直径90m
m、肉厚3.50mm、長さ14.6m の素管について本発明を実
施した結果を図2に示す。図2において、R1は素管、
R2はデスケーリング後の素管、R3は定形圧延後の素
管、図4は固溶化処理後の素管を示している。図2によ
れば、硅砂の投射によるデスケーリングの浸炭防止効果
A、硅砂の投射後更に水を噴射したデスケーリングの浸
炭防止効果Bを、それぞれ顕著に認めることができる。
In the pipe making line of FIG. 1, SUS304L, diameter 90m
FIG. 2 shows the result of carrying out the present invention on a blank tube having a length of m, a wall thickness of 3.50 mm and a length of 14.6 m. In FIG. 2, R1 is a blank tube,
R2 shows a raw pipe after descaling, R3 shows a raw pipe after standard rolling, and FIG. 4 shows a raw pipe after solution treatment. According to FIG. 2, the carburizing prevention effect A of descaling by the projection of silica sand and the carburizing prevention effect B of descaling by further injecting water after the projection of silica sand can be recognized remarkably, respectively.

【0032】図1の造管ラインで、オーステナイト系ス
テンレス鋼管について本発明を実施した結果を表3に示
す。表3によれば、硅砂の投射後更に水を噴射したデス
ケーリングの浸炭防止効果を顕著に認めることができ
る。また、デスケーリング時間を大きく取ることによ
り、大きな浸炭防止効果を得ることができることも明ら
かである。
Table 3 shows the results of carrying out the present invention on an austenitic stainless steel pipe in the pipe making line of FIG. According to Table 3, the carburizing prevention effect of descaling by further injecting water after the projection of silica sand can be recognized remarkably. It is also clear that a large carburizing prevention effect can be obtained by taking a long descaling time.

【0033】[0033]

【表3】 [Table 3]

【0034】[0034]

【発明の効果】以上のように本発明によれば、継目無鋼
管の造管ラインの生産性を損なうことなく、管内表層の
浸炭を十分に防止することができる。
As described above, according to the present invention, it is possible to sufficiently prevent carburization of the surface layer of the pipe without impairing the productivity of the seamless steel pipe making line.

【図面の簡単な説明】[Brief description of drawings]

【図1】図1は本発明が適用される造管ラインの一例を
示す模式図である。
FIG. 1 is a schematic view showing an example of a pipe making line to which the present invention is applied.

【図2】図2は本発明による浸炭防止効果を示す線図で
ある。
FIG. 2 is a diagram showing a carburizing prevention effect according to the present invention.

【図3】図3は造管過程での浸炭防止の推移を示す線図
である。
FIG. 3 is a diagram showing a transition of carburization prevention in a pipe making process.

【符号の説明】[Explanation of symbols]

10 素管 11 再加熱炉 14 砂投射ノズル 16 水噴射ノズル 10 Element Pipe 11 Reheating Furnace 14 Sand Spray Nozzle 16 Water Injection Nozzle

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 炭素含有量が0.10%以下の継目無鋼管の
浸炭防止方法において、圧延過程にある素管の再加熱前
に、素管内面にメカニカルなデスケーリング加工を施す
ことにより素管内面に存在している潤滑剤成分を除去す
ることを特徴とする継目無鋼管の浸炭防止方法。
1. A method for preventing carburization of a seamless steel pipe having a carbon content of 0.10% or less, wherein the inner surface of the raw pipe is subjected to mechanical descaling before reheating the raw pipe in the rolling process. A method for preventing carburization of a seamless steel pipe, which comprises removing a lubricant component existing in the steel.
【請求項2】 炭素含有量が0.10%以下の継目無鋼管の
浸炭防止方法において、圧延過程にある素管の再加熱前
に、素管内面にメカニカルなデスケーリング加工を施す
ことにより素管内面に存在している潤滑剤成分を除去
し、更に該素管の内面に水を噴射して素管内面に残存す
る砂を除去することを特徴とする継目無鋼管の浸炭防止
方法。
2. In the method for preventing carburization of a seamless steel pipe having a carbon content of 0.10% or less, the inner surface of the raw pipe is subjected to mechanical descaling before reheating the raw pipe in the rolling process. A method for preventing carburization of a seamless steel pipe, which comprises removing a lubricant component existing in the pipe, and further spraying water on the inner surface of the pipe to remove sand remaining on the inner surface of the pipe.
JP4355344A 1992-12-21 1992-12-21 Method for preventing carburization of seamless pipe Withdrawn JPH06182427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4355344A JPH06182427A (en) 1992-12-21 1992-12-21 Method for preventing carburization of seamless pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4355344A JPH06182427A (en) 1992-12-21 1992-12-21 Method for preventing carburization of seamless pipe

Publications (1)

Publication Number Publication Date
JPH06182427A true JPH06182427A (en) 1994-07-05

Family

ID=18443397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4355344A Withdrawn JPH06182427A (en) 1992-12-21 1992-12-21 Method for preventing carburization of seamless pipe

Country Status (1)

Country Link
JP (1) JPH06182427A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007114041A1 (en) 2006-03-31 2007-10-11 Sumitomo Metal Industries, Ltd. Method for production of seamless pipe, and oxidizing gas supply apparatus
CN105772454A (en) * 2016-05-11 2016-07-20 江铜华北(天津)铜业有限公司 Copper pipe cleaning device
CN107649463A (en) * 2017-10-13 2018-02-02 江苏恒润波纹管有限公司 A kind of bellows clearing and drying device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007114041A1 (en) 2006-03-31 2007-10-11 Sumitomo Metal Industries, Ltd. Method for production of seamless pipe, and oxidizing gas supply apparatus
US8464568B2 (en) 2006-03-31 2013-06-18 Nippon Steel & Sumitomo Metal Corporation Production method of seamless pipe or tube, and oxidizing gas supply unit
CN105772454A (en) * 2016-05-11 2016-07-20 江铜华北(天津)铜业有限公司 Copper pipe cleaning device
CN105772454B (en) * 2016-05-11 2018-05-18 江铜华北(天津)铜业有限公司 A kind of device cleaned to copper pipe
CN107649463A (en) * 2017-10-13 2018-02-02 江苏恒润波纹管有限公司 A kind of bellows clearing and drying device

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Effective date: 20000307